[gcc(refs/users/marxin/heads/sphinx-final)] sphinx: copy files from texi2rst-generated repository

[gcc(refs/users/marxin/heads/sphinx-final)] sphinx: copy files from texi2rst-generated repository

[Martin Liska]

https://gcc.gnu.org/g:29fbea41e934b89b12de420e8f46552d770c97a9

commit 29fbea41e934b89b12de420e8f46552d770c97a9
Author: Martin Liska <mliska@suse.cz>
Date:   Mon Nov 7 12:54:13 2022 +0100

    sphinx: copy files from texi2rst-generated repository
    
    ChangeLog:
    
            * doc/Makefile: New file.
            * doc/_static/custom.css: New file.
            * doc/baseconf.py: New file.
            * doc/bsd.rst: New file.
            * doc/contrib.rst: New file.
            * doc/contribute.rst: New file.
            * doc/cppdiropts.rst: New file.
            * doc/cppenv.rst: New file.
            * doc/cppopts.rst: New file.
            * doc/cppwarnopts.rst: New file.
            * doc/favicon.ico: New file.
            * doc/funding.rst: New file.
            * doc/gcc_sphinx.py: New file.
            * doc/gnu.rst: New file.
            * doc/gnu_free_documentation_license.rst: New file.
            * doc/gpl-3.0.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/lgpl-2.1.rst: New file.
            * doc/logo.pdf: New file.
            * doc/logo.svg: New file.
            * doc/md.rst: New file.
    
    gcc/d/ChangeLog:
    
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/invoking-gdc.rst: New file.
            * doc/invoking-gdc/code-generation.rst: New file.
            * doc/invoking-gdc/developer-options.rst: New file.
            * doc/invoking-gdc/input-and-output-files.rst: New file.
            * doc/invoking-gdc/options-for-directory-search.rst: New file.
            * doc/invoking-gdc/options-for-linking.rst: New file.
            * doc/invoking-gdc/runtime-options.rst: New file.
            * doc/invoking-gdc/warnings.rst: New file.
    
    gcc/ChangeLog:
    
            * doc/cpp/character-sets.rst: New file.
            * doc/cpp/conditional-syntax.rst: New file.
            * doc/cpp/conditional-uses.rst: New file.
            * doc/cpp/conditionals.rst: New file.
            * doc/cpp/conf.py: New file.
            * doc/cpp/copyright.rst: New file.
            * doc/cpp/deleted-code.rst: New file.
            * doc/cpp/diagnostics.rst: New file.
            * doc/cpp/environment-variables.rst: New file.
            * doc/cpp/gnu-free-documentation-license.rst: New file.
            * doc/cpp/header-files.rst: New file.
            * doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst: New file.
            * doc/cpp/header-files/computed-includes.rst: New file.
            * doc/cpp/header-files/include-operation.rst: New file.
            * doc/cpp/header-files/include-syntax.rst: New file.
            * doc/cpp/header-files/once-only-headers.rst: New file.
            * doc/cpp/header-files/search-path.rst: New file.
            * doc/cpp/header-files/system-headers.rst: New file.
            * doc/cpp/header-files/wrapper-headers.rst: New file.
            * doc/cpp/implementation-defined-behavior.rst: New file.
            * doc/cpp/implementation-details.rst: New file.
            * doc/cpp/implementation-limits.rst: New file.
            * doc/cpp/index.rst: New file.
            * doc/cpp/indices-and-tables.rst: New file.
            * doc/cpp/initial-processing.rst: New file.
            * doc/cpp/invocation.rst: New file.
            * doc/cpp/line-control.rst: New file.
            * doc/cpp/macros.rst: New file.
            * doc/cpp/macros/concatenation.rst: New file.
            * doc/cpp/macros/directives-within-macro-arguments.rst: New file.
            * doc/cpp/macros/function-like-macros.rst: New file.
            * doc/cpp/macros/macro-arguments.rst: New file.
            * doc/cpp/macros/macro-pitfalls.rst: New file.
            * doc/cpp/macros/object-like-macros.rst: New file.
            * doc/cpp/macros/predefined-macros.rst: New file.
            * doc/cpp/macros/stringizing.rst: New file.
            * doc/cpp/macros/undefining-and-redefining-macros.rst: New file.
            * doc/cpp/macros/variadic-macros.rst: New file.
            * doc/cpp/obsolete-features.rst: New file.
            * doc/cpp/other-directives.rst: New file.
            * doc/cpp/overview.rst: New file.
            * doc/cpp/pragmas.rst: New file.
            * doc/cpp/preprocessor-output.rst: New file.
            * doc/cpp/the-preprocessing-language.rst: New file.
            * doc/cpp/tokenization.rst: New file.
            * doc/cpp/traditional-lexical-analysis.rst: New file.
            * doc/cpp/traditional-macros.rst: New file.
            * doc/cpp/traditional-miscellany.rst: New file.
            * doc/cpp/traditional-mode.rst: New file.
            * doc/cpp/traditional-warnings.rst: New file.
            * doc/cppinternals/conf.py: New file.
            * doc/cppinternals/copyright.rst: New file.
            * doc/cppinternals/cppinternals.rst: New file.
            * doc/cppinternals/cpplib.rst: New file.
            * doc/cppinternals/files.rst: New file.
            * doc/cppinternals/index.rst: New file.
            * doc/cppinternals/indices-and-tables.rst: New file.
            * doc/cppinternals/internal-representation-of-macros.rst: New file.
            * doc/cppinternals/just-which-line-number-anyway.rst: New file.
            * doc/cppinternals/lexing-a-line.rst: New file.
            * doc/cppinternals/lexing-a-token.rst: New file.
            * doc/cppinternals/looking-for-a-function-like-macros-opening-parenthesis.rst: New file.
            * doc/cppinternals/macro-expansion-overview.rst: New file.
            * doc/cppinternals/marking-tokens-ineligible-for-future-expansion.rst: New file.
            * doc/cppinternals/multiple-include-optimization.rst: New file.
            * doc/cppinternals/overview.rst: New file.
            * doc/cppinternals/representation-of-line-numbers.rst: New file.
            * doc/cppinternals/scanning-the-replacement-list-for-macros-to-expand.rst: New file.
            * doc/gcc/binary-compatibility.rst: New file.
            * doc/gcc/c++-implementation-defined-behavior.rst: New file.
            * doc/gcc/c-implementation-defined-behavior.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/architecture.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/arrays-and-pointers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/characters.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/declarators.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/environment.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/floating-point.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/hints.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/identifiers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/integers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/library-functions.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/locale-specific-behavior.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/preprocessing-directives.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/qualifiers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/statements.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/structures-unions-enumerations-and-bit-fields.rst:
            New file.
            * doc/gcc/c-implementation-defined-behavior/translation.rst: New file.
            * doc/gcc/conditionally-supported-behavior.rst: New file.
            * doc/gcc/conf.py: New file.
            * doc/gcc/contributing-to-gcc-development.rst: New file.
            * doc/gcc/contributors-to-gcc.rst: New file.
            * doc/gcc/copyright.rst: New file.
            * doc/gcc/exception-handling.rst: New file.
            * doc/gcc/extensions-to-the-c++-language.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/backwards-compatibility.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/c++-concepts.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/c++-interface-and-implementation-pragmas.rst:
            New file.
            * doc/gcc/extensions-to-the-c++-language/c++-specific-variable-function-and-type-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c++-language/deprecated-features.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/extracting-the-function-pointer-from-a-bound-pointer-to-member-function.rst:
            New file.
            * doc/gcc/extensions-to-the-c++-language/function-multiversioning.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/restricting-pointer-aliasing.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/type-traits.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/vague-linkage.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/when-is-a-volatile-c++-object-accessed.rst:
            New file.
            * doc/gcc/extensions-to-the-c++-language/wheres-the-template.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/128-bit-integers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/additional-floating-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/alternate-keywords.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/an-inline-function-is-as-fast-as-a-macro.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/arithmetic-on-void-and-function-pointers.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/arrays-of-length-zero.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/arrays-of-variable-length.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/attribute-syntax.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/binary-constants-using-the-0b-prefix.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/built-in-functions-for-memory-model-aware-atomic-operations.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/built-in-functions-to-perform-arithmetic-with-overflow-checking.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/c++-style-comments.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/case-ranges.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/cast-to-a-union-type.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/complex-numbers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/compound-literals.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/conditionals-with-omitted-operands.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/constructing-function-calls.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/decimal-floating-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/aarch64-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/amd-gcn-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/arc-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/arm-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/avr-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/blackfin-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/bpf-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/c-sky-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/common-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/epiphany-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/h8-300-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/ia-64-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32c-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32r-d-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m68k-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mcore-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mep-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microblaze-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microsoft-windows-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mips-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/msp430-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nds32-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nios-ii-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nvidia-ptx-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/powerpc-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/risc-v-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rl78-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rx-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/s-390-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/sh-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/symbian-os-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/v850-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/visium-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/x86-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/xstormy16-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/designated-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/determining-the-alignment-of-functions-types-or-variables.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/dollar-signs-in-identifier-names.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/double-word-integers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/enumerator-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/fixed-point-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/format-checks-specific-to-particular-target-machines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/function-names-as-strings.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/getting-the-return-or-frame-address-of-a-function.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/half-precision-floating-point.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/hex-floats.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/how-to-use-inline-assembly-language-in-c-code.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/incomplete-enum-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/label-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/labels-as-values.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/legacy-sync-built-in-functions-for-atomic-memory-access.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/locally-declared-labels.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/macros-with-a-variable-number-of-arguments.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/mixed-declarations-labels-and-code.rst:
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            * doc/gcc/extensions-to-the-c-language-family/named-address-spaces.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/nested-functions.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-constant-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-lvalue-arrays-may-have-subscripts.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/nonlocal-gotos.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/object-size-checking-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/other-built-in-functions-provided-by-gcc.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pointer-arguments-in-variadic-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pointers-to-arrays-with-qualifiers-work-as-expected.rst:
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            * doc/gcc/extensions-to-the-c-language-family/pragmas-accepted-by-gcc.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/prototypes-and-old-style-function-definitions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/referring-to-a-type-with-typeof.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/slightly-looser-rules-for-escaped-newlines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-variables.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/statement-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/statements-and-declarations-in-expressions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/structures-with-no-members.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/support-for-offsetof.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/aarch64-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/alpha-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/altera-nios-ii-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arc-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arc-simd-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-armv8-m-security-extensions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-c-language-extensions-acle.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-floating-point-status-and-control-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-iwmmxt-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/avr-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/basic-powerpc-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/blackfin-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/bpf-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/fr-v-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-dsp-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-loongson-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-paired-single-support.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-simd-architecture-msa-support.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/msp430-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/nds32-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/other-mips-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/picochip-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-altivec-vsx-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-atomic-memory-operation-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-hardware-transactional-memory-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-matrix-multiply-assist-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/pru-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/risc-v-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/rx-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/s-390-system-z-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/sh-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/ti-c6x-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-control-flow-protection-intrinsics.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-transactional-memory-intrinsics.rst:
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            * doc/gcc/extensions-to-the-c-language-family/the-character-esc-in-constants.rst: New file.
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            * doc/gcc/extensions-to-the-c-language-family/unnamed-structure-and-union-fields.rst:
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            * doc/gcc/extensions-to-the-c-language-family/using-vector-instructions-through-built-in-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/when-is-a-volatile-object-accessed.rst:
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            * doc/gcc/extensions-to-the-c-language-family/x86-specific-memory-model-extensions-for-transactional-memory.rst:
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            * doc/gcc/funding.rst: New file.
            * doc/gcc/gcc-command-options.rst: New file.
            * doc/gcc/gcc-command-options/c++-modules.rst: New file.
            * doc/gcc/gcc-command-options/compiling-c++-programs.rst: New file.
            * doc/gcc/gcc-command-options/description.rst: New file.
            * doc/gcc/gcc-command-options/environment-variables-affecting-gcc.rst: New file.
            * doc/gcc/gcc-command-options/gcc-developer-options.rst: New file.
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            * doc/gccint/gimple/tuple-specific-accessors/gimplewithcleanupexpr.rst: New file.
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            * doc/gccint/guidelines-for-diagnostics.rst: New file.
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            * doc/gccint/introduction.rst: New file.
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            * doc/gccint/link-time-optimization/using-summary-information-in-ipa-passes.rst: New file.
            * doc/gccint/link-time-optimization/whole-program-assumptions-linker-plugin-and-symbol-visibilities.rst:
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            * doc/gccint/machine-descriptions/c-statements-for-assembler-output.rst: New file.
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            * doc/gccint/machine-descriptions/constant-definitions.rst: New file.
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            * doc/gccint/machine-descriptions/defining-looping-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/defining-rtl-sequences-for-code-generation.rst: New file.
            * doc/gccint/machine-descriptions/everything-about-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/example-of-defineinsn.rst: New file.
            * doc/gccint/machine-descriptions/including-patterns-in-machine-descriptions.rst: New file.
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            * doc/gccint/machine-descriptions/interdependence-of-patterns.rst: New file.
            * doc/gccint/machine-descriptions/iterators.rst: New file.
            * doc/gccint/machine-descriptions/machine-specific-peephole-optimizers.rst: New file.
            * doc/gccint/machine-descriptions/operand-constraints.rst: New file.
            * doc/gccint/machine-descriptions/output-templates-and-operand-substitution.rst: New file.
            * doc/gccint/machine-descriptions/overview-of-how-the-machine-description-is-used.rst:
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            * doc/gccint/machine-descriptions/predicates.rst: New file.
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            * doc/gccint/machine-descriptions/standard-pattern-names-for-generation.rst: New file.
            * doc/gccint/machine-descriptions/when-the-order-of-patterns-matters.rst: New file.
            * doc/gccint/makefile-fragments.rst: New file.
            * doc/gccint/match-and-simplify.rst: New file.
            * doc/gccint/memory-management-and-type-information.rst: New file.
            * doc/gccint/memory-management-and-type-information/how-to-invoke-the-garbage-collector.rst:
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            * doc/gccint/memory-management-and-type-information/marking-roots-for-the-garbage-collector.rst:
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            * doc/gccint/memory-management-and-type-information/source-files-containing-type-information.rst:
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            * doc/gccint/memory-management-and-type-information/support-for-user-provided-gc-marking-routines.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/the-inside-of-a-gty.rst: New file.
            * doc/gccint/memory-management-and-type-information/troubleshooting-the-garbage-collector.rst:
            New file.
            * doc/gccint/option-file-format.rst: New file.
            * doc/gccint/option-properties.rst: New file.
            * doc/gccint/option-specification-files.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/gimplification-pass.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/inter-procedural-optimization-passes.rst:
            New file.
            * doc/gccint/passes-and-files-of-the-compiler/optimization-info.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/parsing-pass.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/pass-manager.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/rtl-passes.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/tree-ssa-passes.rst: New file.
            * doc/gccint/plugins.rst: New file.
            * doc/gccint/plugins/building-gcc-plugins.rst: New file.
            * doc/gccint/plugins/controlling-which-passes-are-being-run.rst: New file.
            * doc/gccint/plugins/giving-information-about-a-plugin.rst: New file.
            * doc/gccint/plugins/interacting-with-the-gcc-garbage-collector.rst: New file.
            * doc/gccint/plugins/interacting-with-the-pass-manager.rst: New file.
            * doc/gccint/plugins/keeping-track-of-available-passes.rst: New file.
            * doc/gccint/plugins/loading-plugins.rst: New file.
            * doc/gccint/plugins/plugin-api.rst: New file.
            * doc/gccint/plugins/recording-information-about-pass-execution.rst: New file.
            * doc/gccint/plugins/registering-custom-attributes-or-pragmas.rst: New file.
            * doc/gccint/rtl-representation.rst: New file.
            * doc/gccint/rtl-representation/access-to-operands.rst: New file.
            * doc/gccint/rtl-representation/access-to-special-operands.rst: New file.
            * doc/gccint/rtl-representation/assembler-instructions-as-expressions.rst: New file.
            * doc/gccint/rtl-representation/bit-fields.rst: New file.
            * doc/gccint/rtl-representation/comparison-operations.rst: New file.
            * doc/gccint/rtl-representation/constant-expression-types.rst: New file.
            * doc/gccint/rtl-representation/conversions.rst: New file.
            * doc/gccint/rtl-representation/declarations.rst: New file.
            * doc/gccint/rtl-representation/embedded-side-effects-on-addresses.rst: New file.
            * doc/gccint/rtl-representation/flags-in-an-rtl-expression.rst: New file.
            * doc/gccint/rtl-representation/insns.rst: New file.
            * doc/gccint/rtl-representation/machine-modes.rst: New file.
            * doc/gccint/rtl-representation/on-the-side-ssa-form-for-rtl.rst: New file.
            * doc/gccint/rtl-representation/reading-rtl.rst: New file.
            * doc/gccint/rtl-representation/registers-and-memory.rst: New file.
            * doc/gccint/rtl-representation/rtl-classes-and-formats.rst: New file.
            * doc/gccint/rtl-representation/rtl-expressions-for-arithmetic.rst: New file.
            * doc/gccint/rtl-representation/rtl-object-types.rst: New file.
            * doc/gccint/rtl-representation/rtl-representation-of-function-call-insns.rst: New file.
            * doc/gccint/rtl-representation/side-effect-expressions.rst: New file.
            * doc/gccint/rtl-representation/structure-sharing-assumptions.rst: New file.
            * doc/gccint/rtl-representation/variable-location-debug-information-in-rtl.rst: New file.
            * doc/gccint/rtl-representation/vector-operations.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/alignment-of-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/arithmetic-on-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/comparisons-involving-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/computing-bounds-on-polyints.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/consequences-of-using-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/converting-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/guidelines-for-using-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/miscellaneous-polyint-routines.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/overview-of-polyint.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/configure-terms-and-history.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-language-front-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-target-back-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/build-system-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/building-documentation.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/configuration-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/headers-installed-by-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/library-source-files-and-headers-under-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/makefile-targets.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/subdirectories-of-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/top-level-source-directory.rst:
            New file.
            * doc/gccint/standard-header-file-directories.rst: New file.
            * doc/gccint/static-analyzer.rst: New file.
            * doc/gccint/target-macros.rst: New file.
            * doc/gccint/target-macros/adding-support-for-named-address-spaces.rst: New file.
            * doc/gccint/target-macros/addressing-modes.rst: New file.
            * doc/gccint/target-macros/adjusting-the-instruction-scheduler.rst: New file.
            * doc/gccint/target-macros/anchored-addresses.rst: New file.
            * doc/gccint/target-macros/c++-abi-parameters.rst: New file.
            * doc/gccint/target-macros/condition-code-status.rst: New file.
            * doc/gccint/target-macros/controlling-debugging-information-format.rst: New file.
            * doc/gccint/target-macros/controlling-the-compilation-driver-gcc.rst: New file.
            * doc/gccint/target-macros/cross-compilation-and-floating-point.rst: New file.
            * doc/gccint/target-macros/d-abi-parameters.rst: New file.
            * doc/gccint/target-macros/defining-coprocessor-specifics-for-mips-targets.rst: New file.
            * doc/gccint/target-macros/defining-data-structures-for-per-function-information.rst:
            New file.
            * doc/gccint/target-macros/defining-target-specific-uses-of-attribute.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-alignment.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-exception-regions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/how-initialization-functions-are-handled.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/macros-controlling-initialization-routines.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-and-generation-of-labels.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-assembler-instructions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-data.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-dispatch-tables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-uninitialized-variables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/the-overall-framework-of-an-assembler-file.rst:
            New file.
            * doc/gccint/target-macros/describing-relative-costs-of-operations.rst: New file.
            * doc/gccint/target-macros/dividing-the-output-into-sections-texts-data.rst: New file.
            * doc/gccint/target-macros/emulating-tls.rst: New file.
            * doc/gccint/target-macros/implementing-the-varargs-macros.rst: New file.
            * doc/gccint/target-macros/implicit-calls-to-library-routines.rst: New file.
            * doc/gccint/target-macros/layout-of-source-language-data-types.rst: New file.
            * doc/gccint/target-macros/miscellaneous-parameters.rst: New file.
            * doc/gccint/target-macros/mode-switching-instructions.rst: New file.
            * doc/gccint/target-macros/parameters-for-precompiled-header-validity-checking.rst:
            New file.
            * doc/gccint/target-macros/position-independent-code.rst: New file.
            * doc/gccint/target-macros/register-classes.rst: New file.
            * doc/gccint/target-macros/register-usage.rst: New file.
            * doc/gccint/target-macros/run-time-target-specification.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/basic-stack-layout.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/caller-saves-register-allocation.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/eliminating-frame-pointer-and-arg-pointer.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/exception-handling-support.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/function-entry-and-exit.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/generating-code-for-profiling.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-large-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-scalar-function-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/miscellaneous-register-hooks.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-arguments-in-registers.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-function-arguments-on-the-stack.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/permitting-tail-calls.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/registers-that-address-the-stack-frame.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/shrink-wrapping-separate-components.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/specifying-how-stack-checking-is-done.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/stack-smashing-protection.rst:
            New file.
            * doc/gccint/target-macros/storage-layout.rst: New file.
            * doc/gccint/target-macros/support-for-nested-functions.rst: New file.
            * doc/gccint/target-macros/the-global-targetm-variable.rst: New file.
            * doc/gccint/target-makefile-fragments.rst: New file.
            * doc/gccint/testsuites.rst: New test.
            * doc/gccint/testsuites/ada-language-testsuites.rst: New test.
            * doc/gccint/testsuites/c-language-testsuites.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/commands-for-use-in-dg-final.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/features-for-dg-add-options.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/keywords-describing-target-attributes.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/selecting-targets-to-which-a-test-applies.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/syntax-and-descriptions-of-test-directives.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/variants-of-dg-require-support.rst:
            New test.
            * doc/gccint/testsuites/idioms-used-in-testsuite-code.rst: New test.
            * doc/gccint/testsuites/support-for-testing-binary-compatibility.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gcov.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gimple-passes.rst: New test.
            * doc/gccint/testsuites/support-for-testing-link-time-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-profile-directed-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-rtl-passes.rst: New test.
            * doc/gccint/testsuites/support-for-torture-testing-using-multiple-options.rst: New test.
            * doc/gccint/the-gcc-low-level-runtime-library.rst: New file.
            * doc/gccint/the-gcc-low-level-runtime-library/language-independent-routines-for-exception-handling.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/miscellaneous-runtime-library-routines.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-decimal-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-fixed-point-fractional-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-integer-arithmetic.rst:
            New file.
            * doc/gccint/the-language.rst: New file.
            * doc/gccint/user-experience-guidelines.rst: New file.
            * doc/install/binaries.rst: New file.
            * doc/install/building.rst: New file.
            * doc/install/building/building-a-cross-compiler.rst: New file.
            * doc/install/building/building-a-native-compiler.rst: New file.
            * doc/install/building/building-in-parallel.rst: New file.
            * doc/install/building/building-the-ada-compiler.rst: New file.
            * doc/install/building/building-the-d-compiler.rst: New file.
            * doc/install/building/building-with-profile-feedback.rst: New file.
            * doc/install/conf.py: New file.
            * doc/install/configuration.rst: New file.
            * doc/install/copyright.rst: New file.
            * doc/install/downloading-gcc.rst: New file.
            * doc/install/final-installation.rst: New file.
            * doc/install/gnu-free-documentation-license.rst: New file.
            * doc/install/host-target-specific-installation-notes-for-gcc.rst: New file.
            * doc/install/how-can-you-run-the-testsuite-on-selected-tests.rst: New test.
            * doc/install/how-to-interpret-test-results.rst: New file.
            * doc/install/index.rst: New file.
            * doc/install/indices-and-tables.rst: New file.
            * doc/install/installing-gcc.rst: New file.
            * doc/install/passing-options-and-running-multiple-testsuites.rst: New test.
            * doc/install/prerequisites.rst: New file.
            * doc/install/submitting-test-results.rst: New file.
            * doc/install/testing.rst: New file.
    
    gcc/fortran/ChangeLog:
    
            * doc/gfc-internals/code-that-interacts-with-the-user.rst: New file.
            * doc/gfc-internals/command-line-options.rst: New file.
            * doc/gfc-internals/conf.py: New file.
            * doc/gfc-internals/copyright.rst: New file.
            * doc/gfc-internals/error-handling.rst: New file.
            * doc/gfc-internals/frontend-data-structures.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/accessing-declarations.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/basic-data-structures.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/converting-expressions-to-tree.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/translating-statements.rst:
            New file.
            * doc/gfc-internals/gfccode.rst: New file.
            * doc/gfc-internals/gfcexpr.rst: New file.
            * doc/gfc-internals/gnu-free-documentation-license.rst: New file.
            * doc/gfc-internals/index.rst: New file.
            * doc/gfc-internals/indices-and-tables.rst: New file.
            * doc/gfc-internals/internals-of-fortran-2003-oop-features.rst: New file.
            * doc/gfc-internals/introduction.rst: New file.
            * doc/gfc-internals/symbol-versioning.rst: New file.
            * doc/gfc-internals/the-libgfortran-runtime-library.rst: New file.
            * doc/gfc-internals/type-bound-operators.rst: New file.
            * doc/gfc-internals/type-bound-procedures.rst: New file.
            * doc/gfortran/about-gnu-fortran.rst: New file.
            * doc/gfortran/coarray-programming.rst: New file.
            * doc/gfortran/compiler-characteristics.rst: New file.
            * doc/gfortran/compiler-characteristics/asynchronous-i-o.rst: New file.
            * doc/gfortran/compiler-characteristics/data-consistency-and-durability.rst: New file.
            * doc/gfortran/compiler-characteristics/evaluation-of-logical-expressions.rst: New file.
            * doc/gfortran/compiler-characteristics/file-format-of-unformatted-sequential-files.rst:
            New file.
            * doc/gfortran/compiler-characteristics/file-operations-on-symbolic-links.rst: New file.
            * doc/gfortran/compiler-characteristics/files-opened-without-an-explicit-action=-specifier.rst:
            New file.
            * doc/gfortran/compiler-characteristics/internal-representation-of-logical-variables.rst:
            New file.
            * doc/gfortran/compiler-characteristics/kind-type-parameters.rst: New file.
            * doc/gfortran/compiler-characteristics/max-and-min-intrinsics-with-real-nan-arguments.rst:
            New file.
            * doc/gfortran/compiler-characteristics/thread-safety-of-the-runtime-library.rst: New file.
            * doc/gfortran/conf.py: New file.
            * doc/gfortran/contributing.rst: New file.
            * doc/gfortran/contributors-to-gnu-fortran.rst: New file.
            * doc/gfortran/copyright.rst: New file.
            * doc/gfortran/extensions-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions-not-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions.rst: New file.
            * doc/gfortran/function-abi-documentation.rst: New file.
            * doc/gfortran/funding.rst: New file.
            * doc/gfortran/general-public-license-3.rst: New file.
            * doc/gfortran/gnu-fortran-and-gcc.rst: New file.
            * doc/gfortran/gnu-fortran-command-options.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/description.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/enable-and-customize-preprocessing.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/environment-variables-affecting-gfortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-runtime-behavior.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-the-linking-step.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/option-summary.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-controlling-fortran-dialect.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-code-generation-conventions.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-debugging-your-program-or-gnu-fortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-directory-search.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-interoperability-with-other-languages.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-to-request-or-suppress-errors-and-warnings.rst:
            New file.
            * doc/gfortran/gnu-fortran-compiler-directives.rst: New file.
            * doc/gfortran/gnu-free-documentation-license.rst: New file.
            * doc/gfortran/index.rst: New file.
            * doc/gfortran/indices-and-tables.rst: New file.
            * doc/gfortran/interoperability-with-c.rst: New file.
            * doc/gfortran/intrinsic-modules.rst: New file.
            * doc/gfortran/intrinsic-modules/ieee-modules-ieeeexceptions-ieeearithmetic-and-ieeefeatures.rst:
            New file.
            * doc/gfortran/intrinsic-modules/isocbinding.rst: New file.
            * doc/gfortran/intrinsic-modules/isofortranenv.rst: New file.
            * doc/gfortran/intrinsic-modules/openacc-module-openacc.rst: New file.
            * doc/gfortran/intrinsic-modules/openmp-modules-omplib-and-omplibkinds.rst: New file.
            * doc/gfortran/intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/abort.rst: New file.
            * doc/gfortran/intrinsic-procedures/abs.rst: New file.
            * doc/gfortran/intrinsic-procedures/access.rst: New file.
            * doc/gfortran/intrinsic-procedures/achar.rst: New file.
            * doc/gfortran/intrinsic-procedures/acos.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustl.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustr.rst: New file.
            * doc/gfortran/intrinsic-procedures/aimag.rst: New file.
            * doc/gfortran/intrinsic-procedures/aint.rst: New file.
            * doc/gfortran/intrinsic-procedures/alarm.rst: New file.
            * doc/gfortran/intrinsic-procedures/all.rst: New file.
            * doc/gfortran/intrinsic-procedures/allocated.rst: New file.
            * doc/gfortran/intrinsic-procedures/and.rst: New file.
            * doc/gfortran/intrinsic-procedures/anint.rst: New file.
            * doc/gfortran/intrinsic-procedures/any.rst: New file.
            * doc/gfortran/intrinsic-procedures/asin.rst: New file.
            * doc/gfortran/intrinsic-procedures/asind.rst: New file.
            * doc/gfortran/intrinsic-procedures/asinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/associated.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2d.rst: New file.
            * doc/gfortran/intrinsic-procedures/atand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomiccas.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicdefine.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicref.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/backtrace.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj0.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besseljn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely0.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselyn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bge.rst: New file.
            * doc/gfortran/intrinsic-procedures/bgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/bitsize.rst: New file.
            * doc/gfortran/intrinsic-procedures/ble.rst: New file.
            * doc/gfortran/intrinsic-procedures/blt.rst: New file.
            * doc/gfortran/intrinsic-procedures/btest.rst: New file.
            * doc/gfortran/intrinsic-procedures/cassociated.rst: New file.
            * doc/gfortran/intrinsic-procedures/ceiling.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfprocpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfunloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/char.rst: New file.
            * doc/gfortran/intrinsic-procedures/chdir.rst: New file.
            * doc/gfortran/intrinsic-procedures/chmod.rst: New file.
            * doc/gfortran/intrinsic-procedures/cloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/cmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/cobroadcast.rst: New file.
            * doc/gfortran/intrinsic-procedures/comax.rst: New file.
            * doc/gfortran/intrinsic-procedures/comin.rst: New file.
            * doc/gfortran/intrinsic-procedures/commandargumentcount.rst: New file.
            * doc/gfortran/intrinsic-procedures/compileroptions.rst: New file.
            * doc/gfortran/intrinsic-procedures/compilerversion.rst: New file.
            * doc/gfortran/intrinsic-procedures/complex.rst: New file.
            * doc/gfortran/intrinsic-procedures/conjg.rst: New file.
            * doc/gfortran/intrinsic-procedures/coreduce.rst: New file.
            * doc/gfortran/intrinsic-procedures/cos.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosum.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotan.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotand.rst: New file.
            * doc/gfortran/intrinsic-procedures/count.rst: New file.
            * doc/gfortran/intrinsic-procedures/cputime.rst: New file.
            * doc/gfortran/intrinsic-procedures/cshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/csizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/ctime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dateandtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dble.rst: New file.
            * doc/gfortran/intrinsic-procedures/dcmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/digits.rst: New file.
            * doc/gfortran/intrinsic-procedures/dim.rst: New file.
            * doc/gfortran/intrinsic-procedures/dotproduct.rst: New file.
            * doc/gfortran/intrinsic-procedures/dprod.rst: New file.
            * doc/gfortran/intrinsic-procedures/dreal.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/dtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eoshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/epsilon.rst: New file.
            * doc/gfortran/intrinsic-procedures/erf.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfc.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfcscaled.rst: New file.
            * doc/gfortran/intrinsic-procedures/etime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eventquery.rst: New file.
            * doc/gfortran/intrinsic-procedures/executecommandline.rst: New file.
            * doc/gfortran/intrinsic-procedures/exit.rst: New file.
            * doc/gfortran/intrinsic-procedures/exp.rst: New file.
            * doc/gfortran/intrinsic-procedures/exponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/extendstypeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/fdate.rst: New file.
            * doc/gfortran/intrinsic-procedures/fget.rst: New file.
            * doc/gfortran/intrinsic-procedures/fgetc.rst: New file.
            * doc/gfortran/intrinsic-procedures/findloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/floor.rst: New file.
            * doc/gfortran/intrinsic-procedures/flush.rst: New file.
            * doc/gfortran/intrinsic-procedures/fnum.rst: New file.
            * doc/gfortran/intrinsic-procedures/fput.rst: New file.
            * doc/gfortran/intrinsic-procedures/fputc.rst: New file.
            * doc/gfortran/intrinsic-procedures/fraction.rst: New file.
            * doc/gfortran/intrinsic-procedures/free.rst: New file.
            * doc/gfortran/intrinsic-procedures/fseek.rst: New file.
            * doc/gfortran/intrinsic-procedures/fstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ftell.rst: New file.
            * doc/gfortran/intrinsic-procedures/gamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/gerror.rst: New file.
            * doc/gfortran/intrinsic-procedures/getarg.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommand.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommandargument.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcwd.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenv.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenvironmentvariable.rst: New file.
            * doc/gfortran/intrinsic-procedures/getgid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getlog.rst: New file.
            * doc/gfortran/intrinsic-procedures/getpid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getuid.rst: New file.
            * doc/gfortran/intrinsic-procedures/gmtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/hostnm.rst: New file.
            * doc/gfortran/intrinsic-procedures/huge.rst: New file.
            * doc/gfortran/intrinsic-procedures/hypot.rst: New file.
            * doc/gfortran/intrinsic-procedures/iachar.rst: New file.
            * doc/gfortran/intrinsic-procedures/iall.rst: New file.
            * doc/gfortran/intrinsic-procedures/iand.rst: New file.
            * doc/gfortran/intrinsic-procedures/iany.rst: New file.
            * doc/gfortran/intrinsic-procedures/iargc.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibclr.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibits.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibset.rst: New file.
            * doc/gfortran/intrinsic-procedures/ichar.rst: New file.
            * doc/gfortran/intrinsic-procedures/idate.rst: New file.
            * doc/gfortran/intrinsic-procedures/ieor.rst: New file.
            * doc/gfortran/intrinsic-procedures/ierrno.rst: New file.
            * doc/gfortran/intrinsic-procedures/imageindex.rst: New file.
            * doc/gfortran/intrinsic-procedures/index.rst: New file.
            * doc/gfortran/intrinsic-procedures/int.rst: New file.
            * doc/gfortran/intrinsic-procedures/int2.rst: New file.
            * doc/gfortran/intrinsic-procedures/int8.rst: New file.
            * doc/gfortran/intrinsic-procedures/introduction-to-intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/ior.rst: New file.
            * doc/gfortran/intrinsic-procedures/iparity.rst: New file.
            * doc/gfortran/intrinsic-procedures/irand.rst: New file.
            * doc/gfortran/intrinsic-procedures/isatty.rst: New file.
            * doc/gfortran/intrinsic-procedures/iscontiguous.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishft.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishftc.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostatend.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostateor.rst: New file.
            * doc/gfortran/intrinsic-procedures/isnan.rst: New file.
            * doc/gfortran/intrinsic-procedures/itime.rst: New file.
            * doc/gfortran/intrinsic-procedures/kill.rst: New file.
            * doc/gfortran/intrinsic-procedures/kind.rst: New file.
            * doc/gfortran/intrinsic-procedures/lbound.rst: New file.
            * doc/gfortran/intrinsic-procedures/lcobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/leadz.rst: New file.
            * doc/gfortran/intrinsic-procedures/len.rst: New file.
            * doc/gfortran/intrinsic-procedures/lentrim.rst: New file.
            * doc/gfortran/intrinsic-procedures/lge.rst: New file.
            * doc/gfortran/intrinsic-procedures/lgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/link.rst: New file.
            * doc/gfortran/intrinsic-procedures/lle.rst: New file.
            * doc/gfortran/intrinsic-procedures/llt.rst: New file.
            * doc/gfortran/intrinsic-procedures/lnblnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/loc.rst: New file.
            * doc/gfortran/intrinsic-procedures/log.rst: New file.
            * doc/gfortran/intrinsic-procedures/log10.rst: New file.
            * doc/gfortran/intrinsic-procedures/loggamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/logical.rst: New file.
            * doc/gfortran/intrinsic-procedures/lshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/lstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ltime.rst: New file.
            * doc/gfortran/intrinsic-procedures/malloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskl.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskr.rst: New file.
            * doc/gfortran/intrinsic-procedures/matmul.rst: New file.
            * doc/gfortran/intrinsic-procedures/max.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock8.rst: New file.
            * doc/gfortran/intrinsic-procedures/merge.rst: New file.
            * doc/gfortran/intrinsic-procedures/mergebits.rst: New file.
            * doc/gfortran/intrinsic-procedures/min.rst: New file.
            * doc/gfortran/intrinsic-procedures/minexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/minloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/minval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mod.rst: New file.
            * doc/gfortran/intrinsic-procedures/modulo.rst: New file.
            * doc/gfortran/intrinsic-procedures/movealloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/mvbits.rst: New file.
            * doc/gfortran/intrinsic-procedures/nearest.rst: New file.
            * doc/gfortran/intrinsic-procedures/newline.rst: New file.
            * doc/gfortran/intrinsic-procedures/nint.rst: New file.
            * doc/gfortran/intrinsic-procedures/norm2.rst: New file.
            * doc/gfortran/intrinsic-procedures/not.rst: New file.
            * doc/gfortran/intrinsic-procedures/null.rst: New file.
            * doc/gfortran/intrinsic-procedures/numimages.rst: New file.
            * doc/gfortran/intrinsic-procedures/or.rst: New file.
            * doc/gfortran/intrinsic-procedures/pack.rst: New file.
            * doc/gfortran/intrinsic-procedures/parity.rst: New file.
            * doc/gfortran/intrinsic-procedures/perror.rst: New file.
            * doc/gfortran/intrinsic-procedures/popcnt.rst: New file.
            * doc/gfortran/intrinsic-procedures/poppar.rst: New file.
            * doc/gfortran/intrinsic-procedures/precision.rst: New file.
            * doc/gfortran/intrinsic-procedures/present.rst: New file.
            * doc/gfortran/intrinsic-procedures/product.rst: New file.
            * doc/gfortran/intrinsic-procedures/radix.rst: New file.
            * doc/gfortran/intrinsic-procedures/ran.rst: New file.
            * doc/gfortran/intrinsic-procedures/rand.rst: New file.
            * doc/gfortran/intrinsic-procedures/randominit.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomnumber.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomseed.rst: New file.
            * doc/gfortran/intrinsic-procedures/range.rst: New file.
            * doc/gfortran/intrinsic-procedures/rank.rst: New file.
            * doc/gfortran/intrinsic-procedures/real.rst: New file.
            * doc/gfortran/intrinsic-procedures/rename.rst: New file.
            * doc/gfortran/intrinsic-procedures/repeat.rst: New file.
            * doc/gfortran/intrinsic-procedures/reshape.rst: New file.
            * doc/gfortran/intrinsic-procedures/rrspacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/rshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/sametypeas.rst: New file.
            * doc/gfortran/intrinsic-procedures/scale.rst: New file.
            * doc/gfortran/intrinsic-procedures/scan.rst: New file.
            * doc/gfortran/intrinsic-procedures/secnds.rst: New file.
            * doc/gfortran/intrinsic-procedures/second.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedcharkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedintkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedrealkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/setexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/shape.rst: New file.
            * doc/gfortran/intrinsic-procedures/shifta.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/sign.rst: New file.
            * doc/gfortran/intrinsic-procedures/signal.rst: New file.
            * doc/gfortran/intrinsic-procedures/sin.rst: New file.
            * doc/gfortran/intrinsic-procedures/sind.rst: New file.
            * doc/gfortran/intrinsic-procedures/sinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/size.rst: New file.
            * doc/gfortran/intrinsic-procedures/sizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/sleep.rst: New file.
            * doc/gfortran/intrinsic-procedures/spacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/spread.rst: New file.
            * doc/gfortran/intrinsic-procedures/sqrt.rst: New file.
            * doc/gfortran/intrinsic-procedures/srand.rst: New file.
            * doc/gfortran/intrinsic-procedures/stat.rst: New file.
            * doc/gfortran/intrinsic-procedures/storagesize.rst: New file.
            * doc/gfortran/intrinsic-procedures/sum.rst: New file.
            * doc/gfortran/intrinsic-procedures/symlnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/system.rst: New file.
            * doc/gfortran/intrinsic-procedures/systemclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/tan.rst: New file.
            * doc/gfortran/intrinsic-procedures/tand.rst: New file.
            * doc/gfortran/intrinsic-procedures/tanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/thisimage.rst: New file.
            * doc/gfortran/intrinsic-procedures/time.rst: New file.
            * doc/gfortran/intrinsic-procedures/time8.rst: New file.
            * doc/gfortran/intrinsic-procedures/tiny.rst: New file.
            * doc/gfortran/intrinsic-procedures/trailz.rst: New file.
            * doc/gfortran/intrinsic-procedures/transfer.rst: New file.
            * doc/gfortran/intrinsic-procedures/transpose.rst: New file.
            * doc/gfortran/intrinsic-procedures/trim.rst: New file.
            * doc/gfortran/intrinsic-procedures/ttynam.rst: New file.
            * doc/gfortran/intrinsic-procedures/ubound.rst: New file.
            * doc/gfortran/intrinsic-procedures/ucobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/umask.rst: New file.
            * doc/gfortran/intrinsic-procedures/unlink.rst: New file.
            * doc/gfortran/intrinsic-procedures/unpack.rst: New file.
            * doc/gfortran/intrinsic-procedures/verify.rst: New file.
            * doc/gfortran/intrinsic-procedures/xor.rst: New file.
            * doc/gfortran/introduction.rst: New file.
            * doc/gfortran/mixed-language-programming.rst: New file.
            * doc/gfortran/naming-and-argument-passing-conventions.rst: New file.
            * doc/gfortran/non-fortran-main-program.rst: New file.
            * doc/gfortran/projects.rst: New file.
            * doc/gfortran/runtime.rst: New file.
            * doc/gfortran/runtime/gfortranconvertunit.rst: New file.
            * doc/gfortran/runtime/gfortranerrorbacktrace.rst: New file.
            * doc/gfortran/runtime/gfortranformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/gfortranlistseparator.rst: New file.
            * doc/gfortran/runtime/gfortranoptionalplus.rst: New file.
            * doc/gfortran/runtime/gfortranshowlocus.rst: New file.
            * doc/gfortran/runtime/gfortranstderrunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdinunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdoutunit.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedall.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedpreconnected.rst: New file.
            * doc/gfortran/runtime/gfortranunformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/tmpdir.rst: New file.
            * doc/gfortran/standards.rst: New file.
            * doc/gfortran/type-and-enum-abi-documentation.rst: New file.
    
    gcc/go/ChangeLog:
    
            * doc/c-interoperability.rst: New file.
            * doc/c-type-interoperability.rst: New file.
            * doc/compiler-directives.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/function-names.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/import-and-export.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/invoking-gccgo.rst: New file.
    
    libgomp/ChangeLog:
    
            * doc/amd-radeon-gcn.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/cuda-streams-usage.rst: New file.
            * doc/enabling-openacc.rst: New file.
            * doc/enabling-openmp.rst: New file.
            * doc/first-invocation-nvidia-cublas-library-api.rst: New file.
            * doc/first-invocation-openacc-library-api.rst: New file.
            * doc/funding.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/implementation-status-and-implementation-defined-behavior.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/memory-allocation-with-libmemkind.rst: New file.
            * doc/nvptx.rst: New file.
            * doc/offload-target-specifics.rst: New file.
            * doc/openacc-environment-variables.rst: New file.
            * doc/openacc-environment-variables/accdevicenum.rst: New file.
            * doc/openacc-environment-variables/accdevicetype.rst: New file.
            * doc/openacc-environment-variables/accproflib.rst: New file.
            * doc/openacc-environment-variables/gccaccnotify.rst: New file.
            * doc/openacc-introduction.rst: New file.
            * doc/openacc-library-and-environment-variables.rst: New file.
            * doc/openacc-library-interoperability.rst: New file.
            * doc/openacc-profiling-interface.rst: New file.
            * doc/openacc-runtime-library-routines.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctest.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctestall.rst: New file.
            * doc/openacc-runtime-library-routines/accattach.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyin.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyout.rst: New file.
            * doc/openacc-runtime-library-routines/acccreate.rst: New file.
            * doc/openacc-runtime-library-routines/accdelete.rst: New file.
            * doc/openacc-runtime-library-routines/accdetach.rst: New file.
            * doc/openacc-runtime-library-routines/accdeviceptr.rst: New file.
            * doc/openacc-runtime-library-routines/accfree.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudacontext.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudadevice.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accgetnumdevices.rst: New file.
            * doc/openacc-runtime-library-routines/accgetproperty.rst: New file.
            * doc/openacc-runtime-library-routines/acchostptr.rst: New file.
            * doc/openacc-runtime-library-routines/accinit.rst: New file.
            * doc/openacc-runtime-library-routines/accispresent.rst: New file.
            * doc/openacc-runtime-library-routines/accmalloc.rst: New file.
            * doc/openacc-runtime-library-routines/accmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpyfromdevice.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpytodevice.rst: New file.
            * doc/openacc-runtime-library-routines/accondevice.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcopyin.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcreate.rst: New file.
            * doc/openacc-runtime-library-routines/accproflookup.rst: New file.
            * doc/openacc-runtime-library-routines/accprofregister.rst: New file.
            * doc/openacc-runtime-library-routines/accprofunregister.rst: New file.
            * doc/openacc-runtime-library-routines/accregisterlibrary.rst: New file.
            * doc/openacc-runtime-library-routines/accsetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accshutdown.rst: New file.
            * doc/openacc-runtime-library-routines/accunmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accupdatedevice.rst: New file.
            * doc/openacc-runtime-library-routines/accupdateself.rst: New file.
            * doc/openacc-runtime-library-routines/accwait.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitall.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitallasync.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitasync.rst: New file.
            * doc/openmp-context-selectors.rst: New file.
            * doc/openmp-environment-variables.rst: New file.
            * doc/openmp-environment-variables/gompcpuaffinity.rst: New file.
            * doc/openmp-environment-variables/gompdebug.rst: New file.
            * doc/openmp-environment-variables/gomprtemsthreadpools.rst: New file.
            * doc/openmp-environment-variables/gompspincount.rst: New file.
            * doc/openmp-environment-variables/gompstacksize.rst: New file.
            * doc/openmp-environment-variables/ompcancellation.rst: New file.
            * doc/openmp-environment-variables/ompdefaultdevice.rst: New file.
            * doc/openmp-environment-variables/ompdisplayenv.rst: New file.
            * doc/openmp-environment-variables/ompdynamic.rst: New file.
            * doc/openmp-environment-variables/ompmaxactivelevels.rst: New file.
            * doc/openmp-environment-variables/ompmaxtaskpriority.rst: New file.
            * doc/openmp-environment-variables/ompnested.rst: New file.
            * doc/openmp-environment-variables/ompnumteams.rst: New file.
            * doc/openmp-environment-variables/ompnumthreads.rst: New file.
            * doc/openmp-environment-variables/ompplaces.rst: New file.
            * doc/openmp-environment-variables/ompprocbind.rst: New file.
            * doc/openmp-environment-variables/ompschedule.rst: New file.
            * doc/openmp-environment-variables/ompstacksize.rst: New file.
            * doc/openmp-environment-variables/omptargetoffload.rst: New file.
            * doc/openmp-environment-variables/ompteamsthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompwaitpolicy.rst: New file.
            * doc/openmp-implementation-specifics.rst: New file.
            * doc/openmp-implementation-status.rst: New file.
            * doc/openmp-implementation-status/openmp-45.rst: New file.
            * doc/openmp-implementation-status/openmp-50.rst: New file.
            * doc/openmp-implementation-status/openmp-51.rst: New file.
            * doc/openmp-implementation-status/openmp-52.rst: New file.
            * doc/openmp-runtime-library-routines.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroylock.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroynestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompfulfillevent.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetactivelevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetancestorthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetcancellation.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdevicenum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetlevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxtaskpriority.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumdevices.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumprocs.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetprocbind.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetsupportedactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsize.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtick.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtime.rst: New file.
            * doc/openmp-runtime-library-routines/ompinfinal.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinparallel.rst: New file.
            * doc/openmp-runtime-library-routines/ompisinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/omptestlock.rst: New file.
            * doc/openmp-runtime-library-routines/omptestnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetnestlock.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/the-libgomp-abi.rst: New file.
            * doc/the-libgomp-abi/implementing-atomic-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-barrier-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-critical-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-firstprivate-lastprivate-copyin-and-copyprivate-clauses.rst:
            New file.
            * doc/the-libgomp-abi/implementing-flush-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-for-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-master-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-openaccs-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-ordered-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-private-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-reduction-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-sections-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-single-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-threadprivate-construct.rst: New file.
    
    libiberty/ChangeLog:
    
            * doc/bsd.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/extensions.rst: New file.
            * doc/function-variable-and-macro-listing.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/lesser-general-public-license-2.1.rst: New file.
            * doc/overview.rst: New file.
            * doc/replacement-functions.rst: New file.
            * doc/supplemental-functions.rst: New file.
            * doc/using.rst: New file.
    
    libitm/ChangeLog:
    
            * doc/c-c++-language-constructs-for-tm.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/enabling-libitm.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/internals.rst: New file.
            * doc/locking-conventions.rst: New file.
            * doc/nesting-flat-vs-closed.rst: New file.
            * doc/the-libitm-abi.rst: New file.
            * doc/the-libitm-abi/function-list.rst: New file.
            * doc/the-libitm-abi/future-enhancements-to-the-abi.rst: New file.
            * doc/the-libitm-abi/library-design-principles.rst: New file.
            * doc/the-libitm-abi/memory-model.rst: New file.
            * doc/the-libitm-abi/non-objectives.rst: New file.
            * doc/the-libitm-abi/objectives.rst: New file.
            * doc/the-libitm-abi/sample-code.rst: New file.
            * doc/the-libitm-abi/types-and-macros-list.rst: New file.
            * doc/tm-methods-and-method-groups.rst: New file.
    
    libquadmath/ChangeLog:
    
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/i-o-library-routines.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/math-library-routines.rst: New file.
            * doc/quadmathsnprintf.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/strtoflt128.rst: New file.
            * doc/typedef-and-constants.rst: New file.

Diff:
---
 doc/Makefile                                       |   97 +
 doc/_static/custom.css                             |   11 +
 doc/baseconf.py                                    |  230 +
 doc/bsd.rst                                        |   39 +
 doc/contrib.rst                                    | 1273 +++++
 doc/contribute.rst                                 |   21 +
 doc/cppdiropts.rst                                 |  217 +
 doc/cppenv.rst                                     |   97 +
 doc/cppopts.rst                                    |  556 +++
 doc/cppwarnopts.rst                                |    4 +
 doc/favicon.ico                                    |  Bin 0 -> 766 bytes
 doc/funding.rst                                    |   47 +
 doc/gcc_sphinx.py                                  |   44 +
 doc/gnu.rst                                        |   19 +
 doc/gnu_free_documentation_license.rst             |  476 ++
 doc/gpl-3.0.rst                                    |  707 +++
 doc/indices-and-tables.rst                         |   13 +
 doc/lgpl-2.1.rst                                   |  514 +++
 doc/logo.pdf                                       |  Bin 0 -> 8978 bytes
 doc/logo.svg                                       |  108 +
 doc/md.rst                                         | 3142 +++++++++++++
 gcc/d/doc/conf.py                                  |   30 +
 gcc/d/doc/copyright.rst                            |   13 +
 gcc/d/doc/general-public-license-3.rst             |    6 +
 gcc/d/doc/gnu-free-documentation-license.rst       |    6 +
 gcc/d/doc/index.rst                                |   22 +
 gcc/d/doc/indices-and-tables.rst                   |    1 +
 gcc/d/doc/invoking-gdc.rst                         |   48 +
 gcc/d/doc/invoking-gdc/code-generation.rst         |  170 +
 gcc/d/doc/invoking-gdc/developer-options.rst       |   31 +
 gcc/d/doc/invoking-gdc/input-and-output-files.rst  |   45 +
 .../invoking-gdc/options-for-directory-search.rst  |   92 +
 gcc/d/doc/invoking-gdc/options-for-linking.rst     |   59 +
 gcc/d/doc/invoking-gdc/runtime-options.rst         |  314 ++
 gcc/d/doc/invoking-gdc/warnings.rst                |  148 +
 gcc/doc/cpp/character-sets.rst                     |   56 +
 gcc/doc/cpp/conditional-syntax.rst                 |  411 ++
 gcc/doc/cpp/conditional-uses.rst                   |   32 +
 gcc/doc/cpp/conditionals.rst                       |   44 +
 gcc/doc/cpp/conf.py                                |   30 +
 gcc/doc/cpp/copyright.rst                          |   24 +
 gcc/doc/cpp/deleted-code.rst                       |   34 +
 gcc/doc/cpp/diagnostics.rst                        |   51 +
 gcc/doc/cpp/environment-variables.rst              |   23 +
 gcc/doc/cpp/gnu-free-documentation-license.rst     |    6 +
 gcc/doc/cpp/header-files.rst                       |   56 +
 .../alternatives-to-wrapper-ifndef.rst             |   40 +
 gcc/doc/cpp/header-files/computed-includes.rst     |   86 +
 gcc/doc/cpp/header-files/include-operation.rst     |   67 +
 gcc/doc/cpp/header-files/include-syntax.rst        |   42 +
 gcc/doc/cpp/header-files/once-only-headers.rst     |   52 +
 gcc/doc/cpp/header-files/search-path.rst           |   53 +
 gcc/doc/cpp/header-files/system-headers.rst        |   41 +
 gcc/doc/cpp/header-files/wrapper-headers.rst       |   58 +
 gcc/doc/cpp/implementation-defined-behavior.rst    |   97 +
 gcc/doc/cpp/implementation-details.rst             |   23 +
 gcc/doc/cpp/implementation-limits.rst              |   68 +
 gcc/doc/cpp/index.rst                              |   35 +
 gcc/doc/cpp/indices-and-tables.rst                 |    1 +
 gcc/doc/cpp/initial-processing.rst                 |  164 +
 gcc/doc/cpp/invocation.rst                         |   81 +
 gcc/doc/cpp/line-control.rst                       |   55 +
 gcc/doc/cpp/macros.rst                             |   37 +
 gcc/doc/cpp/macros/concatenation.rst               |   85 +
 .../macros/directives-within-macro-arguments.rst   |   39 +
 gcc/doc/cpp/macros/function-like-macros.rst        |   55 +
 gcc/doc/cpp/macros/macro-arguments.rst             |  112 +
 gcc/doc/cpp/macros/macro-pitfalls.rst              |  449 ++
 gcc/doc/cpp/macros/object-like-macros.rst          |  126 +
 gcc/doc/cpp/macros/predefined-macros.rst           |  874 ++++
 gcc/doc/cpp/macros/stringizing.rst                 |   86 +
 .../macros/undefining-and-redefining-macros.rst    |   67 +
 gcc/doc/cpp/macros/variadic-macros.rst             |  141 +
 gcc/doc/cpp/obsolete-features.rst                  |   98 +
 gcc/doc/cpp/other-directives.rst                   |   30 +
 gcc/doc/cpp/overview.rst                           |   67 +
 gcc/doc/cpp/pragmas.rst                            |  121 +
 gcc/doc/cpp/preprocessor-output.rst                |   86 +
 gcc/doc/cpp/the-preprocessing-language.rst         |   69 +
 gcc/doc/cpp/tokenization.rst                       |  168 +
 gcc/doc/cpp/traditional-lexical-analysis.rst       |   74 +
 gcc/doc/cpp/traditional-macros.rst                 |   99 +
 gcc/doc/cpp/traditional-miscellany.rst             |   30 +
 gcc/doc/cpp/traditional-mode.rst                   |   35 +
 gcc/doc/cpp/traditional-warnings.rst               |   49 +
 gcc/doc/cppinternals/conf.py                       |   24 +
 gcc/doc/cppinternals/copyright.rst                 |   19 +
 gcc/doc/cppinternals/cppinternals.rst              |  284 ++
 gcc/doc/cppinternals/cpplib.rst                    |   29 +
 gcc/doc/cppinternals/files.rst                     |   70 +
 gcc/doc/cppinternals/index.rst                     |   21 +
 gcc/doc/cppinternals/indices-and-tables.rst        |    1 +
 .../internal-representation-of-macros.rst          |   27 +
 .../cppinternals/just-which-line-number-anyway.rst |   62 +
 gcc/doc/cppinternals/lexing-a-line.rst             |   91 +
 gcc/doc/cppinternals/lexing-a-token.rst            |  177 +
 ...-a-function-like-macros-opening-parenthesis.rst |   24 +
 gcc/doc/cppinternals/macro-expansion-overview.rst  |   51 +
 ...king-tokens-ineligible-for-future-expansion.rst |   24 +
 .../cppinternals/multiple-include-optimization.rst |  117 +
 gcc/doc/cppinternals/overview.rst                  |   24 +
 .../representation-of-line-numbers.rst             |   32 +
 ...g-the-replacement-list-for-macros-to-expand.rst |   57 +
 gcc/doc/gcc/binary-compatibility.rst               |  151 +
 .../gcc/c++-implementation-defined-behavior.rst    |   33 +
 gcc/doc/gcc/c-implementation-defined-behavior.rst  |   46 +
 .../architecture.rst                               |   47 +
 .../arrays-and-pointers.rst                        |   46 +
 .../characters.rst                                 |   93 +
 .../declarators.rst                                |   14 +
 .../environment.rst                                |   18 +
 .../floating-point.rst                             |   88 +
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 .../identifiers.rst                                |   28 +
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 .../library-functions.rst                          |   19 +
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 .../qualifiers.rst                                 |   53 +
 .../statements.rst                                 |   14 +
 ...ructures-unions-enumerations-and-bit-fields.rst |   78 +
 .../translation.rst                                |   20 +
 gcc/doc/gcc/conditionally-supported-behavior.rst   |   20 +
 gcc/doc/gcc/conf.py                                |   37 +
 gcc/doc/gcc/contributing-to-gcc-development.rst    |    6 +
 gcc/doc/gcc/contributors-to-gcc.rst                |    6 +
 gcc/doc/gcc/copyright.rst                          |   25 +
 gcc/doc/gcc/exception-handling.rst                 |   15 +
 gcc/doc/gcc/extensions-to-the-c++-language.rst     |   34 +
 .../backwards-compatibility.rst                    |   27 +
 .../c++-concepts.rst                               |   44 +
 .../c++-interface-and-implementation-pragmas.rst   |   97 +
 ...cific-variable-function-and-type-attributes.rst |   95 +
 .../deprecated-features.rst                        |   43 +
 ...ter-from-a-bound-pointer-to-member-function.rst |   48 +
 .../function-multiversioning.rst                   |   65 +
 .../restricting-pointer-aliasing.rst               |   52 +
 .../extensions-to-the-c++-language/type-traits.rst |  165 +
 .../vague-linkage.rst                              |   80 +
 .../when-is-a-volatile-c++-object-accessed.rst     |   58 +
 .../wheres-the-template.rst                        |  131 +
 .../gcc/extensions-to-the-c-language-family.rst    |   92 +
 .../128-bit-integers.rst                           |   18 +
 .../additional-floating-types.rst                  |   83 +
 .../alternate-keywords.rst                         |   46 +
 .../an-inline-function-is-as-fast-as-a-macro.rst   |  126 +
 .../arithmetic-on-void-and-function-pointers.rst   |   23 +
 .../arrays-of-length-zero.rst                      |  111 +
 .../arrays-of-variable-length.rst                  |   99 +
 .../attribute-syntax.rst                           |  259 ++
 .../binary-constants-using-the-0b-prefix.rst       |   29 +
 ...ns-for-memory-model-aware-atomic-operations.rst |  290 ++
 ...o-perform-arithmetic-with-overflow-checking.rst |  102 +
 .../c++-style-comments.rst                         |   18 +
 .../case-ranges.rst                                |   43 +
 .../cast-to-a-union-type.rst                       |   69 +
 .../complex-numbers.rst                            |  122 +
 .../compound-literals.rst                          |  104 +
 .../conditionals-with-omitted-operands.rst         |   39 +
 .../constructing-function-calls.rst                |  125 +
 .../decimal-floating-types.rst                     |   47 +
 .../declaring-attributes-of-functions.rst          |  109 +
 .../aarch64-function-attributes.rst                |  192 +
 .../amd-gcn-function-attributes.rst                |   93 +
 .../arc-function-attributes.rst                    |   88 +
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 .../blackfin-function-attributes.rst               |   91 +
 .../bpf-function-attributes.rst                    |   24 +
 .../c-sky-function-attributes.rst                  |   37 +
 .../common-function-attributes.rst                 | 1891 ++++++++
 .../epiphany-function-attributes.rst               |   82 +
 .../h8-300-function-attributes.rst                 |   39 +
 .../ia-64-function-attributes.rst                  |   36 +
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 .../microsoft-windows-function-attributes.rst      |  104 +
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 .../msp430-function-attributes.rst                 |  103 +
 .../nds32-function-attributes.rst                  |   96 +
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 .../nvidia-ptx-function-attributes.rst             |   22 +
 .../powerpc-function-attributes.rst                |  225 +
 .../risc-v-function-attributes.rst                 |   43 +
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 .../v850-function-attributes.rst                   |   20 +
 .../visium-function-attributes.rst                 |   22 +
 .../x86-function-attributes.rst                    | 1020 ++++
 .../xstormy16-function-attributes.rst              |   20 +
 .../designated-initializers.rst                    |  147 +
 ...e-alignment-of-functions-types-or-variables.rst |   44 +
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 .../fixed-point-types.rst                          |  128 +
 ...ecks-specific-to-particular-target-machines.rst |   47 +
 .../function-names-as-strings.rst                  |   71 +
 ...g-the-return-or-frame-address-of-a-function.rst |   97 +
 .../half-precision-floating-point.rst              |   76 +
 .../hex-floats.rst                                 |   30 +
 ...w-to-use-inline-assembly-language-in-c-code.rst | 1979 ++++++++
 .../incomplete-enum-types.rst                      |   23 +
 .../label-attributes.rst                           |   65 +
 .../labels-as-values.rst                           |   86 +
 ...built-in-functions-for-atomic-memory-access.rst |  171 +
 .../locally-declared-labels.rst                    |   82 +
 .../macros-with-a-variable-number-of-arguments.rst |   68 +
 .../mixed-declarations-labels-and-code.rst         |   27 +
 .../named-address-spaces.rst                       |  240 +
 .../nested-functions.rst                           |  132 +
 .../non-constant-initializers.rst                  |   23 +
 .../non-lvalue-arrays-may-have-subscripts.rst      |   30 +
 .../nonlocal-gotos.rst                             |   62 +
 .../object-size-checking-built-in-functions.rst    |  145 +
 .../other-built-in-functions-provided-by-gcc.rst   | 1245 +++++
 .../pointer-arguments-in-variadic-functions.rst    |   22 +
 ...-to-arrays-with-qualifiers-work-as-expected.rst |   27 +
 .../pragmas-accepted-by-gcc.rst                    |  729 +++
 ...ototypes-and-old-style-function-definitions.rst |   63 +
 .../referring-to-a-type-with-typeof.rst            |  137 +
 .../slightly-looser-rules-for-escaped-newlines.rst |   23 +
 .../specifying-attributes-of-types.rst             |  713 +++
 .../specifying-attributes-of-variables.rst         | 1187 +++++
 .../statement-attributes.rst                       |   71 +
 .../statements-and-declarations-in-expressions.rst |  164 +
 .../structures-with-no-members.rst                 |   22 +
 .../support-for-offsetof.rst                       |   34 +
 .../target-builtins.rst                            |   53 +
 .../target-builtins/aarch64-built-in-functions.rst |   24 +
 .../target-builtins/alpha-built-in-functions.rst   |   88 +
 .../altera-nios-ii-built-in-functions.rst          |  118 +
 .../target-builtins/arc-built-in-functions.rst     |  233 +
 .../arc-simd-built-in-functions.rst                |  245 +
 .../arm-armv8-m-security-extensions.rst            |   35 +
 .../arm-c-language-extensions-acle.rst             |   30 +
 ...loating-point-status-and-control-intrinsics.rst |   17 +
 .../arm-iwmmxt-built-in-functions.rst              |  159 +
 .../target-builtins/avr-built-in-functions.rst     |  114 +
 .../basic-powerpc-built-in-functions.rst           |  724 +++
 .../blackfin-built-in-functions.rst                |   20 +
 .../target-builtins/bpf-built-in-functions.rst     |  100 +
 .../target-builtins/fr-v-built-in-functions.rst    |  474 ++
 .../mips-dsp-built-in-functions.rst                |  312 ++
 .../mips-loongson-built-in-functions.rst           |  447 ++
 .../target-builtins/mips-paired-single-support.rst |   45 +
 .../mips-simd-architecture-msa-support.rst         |  812 ++++
 .../target-builtins/msp430-built-in-functions.rst  |   36 +
 .../target-builtins/nds32-built-in-functions.rst   |   44 +
 .../other-mips-built-in-functions.rst              |   27 +
 .../picochip-built-in-functions.rst                |   45 +
 .../powerpc-altivec-vsx-built-in-functions.rst     | 2181 +++++++++
 .../powerpc-atomic-memory-operation-functions.rst  |   68 +
 ...are-transactional-memory-built-in-functions.rst |  226 +
 ...c-matrix-multiply-assist-built-in-functions.rst |  104 +
 .../target-builtins/pru-built-in-functions.rst     |   34 +
 .../target-builtins/risc-v-built-in-functions.rst  |   16 +
 .../target-builtins/rx-built-in-functions.rst      |  122 +
 .../s-390-system-z-built-in-functions.rst          |  121 +
 .../target-builtins/sh-built-in-functions.rst      |   50 +
 .../sparc-vis-built-in-functions.rst               |  226 +
 .../target-builtins/ti-c6x-built-in-functions.rst  |   43 +
 .../target-builtins/x86-built-in-functions.rst     | 1698 +++++++
 .../x86-control-flow-protection-intrinsics.rst     |   50 +
 .../x86-transactional-memory-intrinsics.rst        |  102 +
 .../the-character-esc-in-constants.rst             |   12 +
 .../thread-local-storage.rst                       |  219 +
 .../unnamed-structure-and-union-fields.rst         |   86 +
 ...tor-instructions-through-built-in-functions.rst |  285 ++
 .../when-is-a-volatile-object-accessed.rst         |   86 +
 ...y-model-extensions-for-transactional-memory.rst |   38 +
 gcc/doc/gcc/funding.rst                            |    6 +
 gcc/doc/gcc/gcc-command-options.rst                |   67 +
 gcc/doc/gcc/gcc-command-options/c++-modules.rst    |  352 ++
 .../gcc-command-options/compiling-c++-programs.rst |   42 +
 gcc/doc/gcc/gcc-command-options/description.rst    |   73 +
 .../environment-variables-affecting-gcc.rst        |  163 +
 .../gcc-command-options/gcc-developer-options.rst  | 1174 +++++
 .../machine-dependent-options.rst                  |   92 +
 .../machine-dependent-options/aarch64-options.rst  |  550 +++
 .../adapteva-epiphany-options.rst                  |  163 +
 .../machine-dependent-options/amd-gcn-options.rst  |   58 +
 .../machine-dependent-options/arc-options.rst      |  759 +++
 .../machine-dependent-options/arm-options.rst      | 1037 +++++
 .../machine-dependent-options/avr-mmcu.rst         |   97 +
 .../machine-dependent-options/avr-options.rst      |  543 +++
 .../machine-dependent-options/blackfin-options.rst |  227 +
 .../machine-dependent-options/c-sky-options.rst    |  193 +
 .../machine-dependent-options/c6x-options.rst      |   55 +
 .../machine-dependent-options/cris-options.rst     |  102 +
 .../machine-dependent-options/darwin-options.rst   |  224 +
 .../dec-alpha-options.rst                          |  274 ++
 .../machine-dependent-options/ebpf-options.rst     |   94 +
 .../machine-dependent-options/fr30-options.rst     |   27 +
 .../machine-dependent-options/frv-options.rst      |  279 ++
 .../machine-dependent-options/ft32-options.rst     |   44 +
 .../gnu-linux-options.rst                          |   56 +
 .../machine-dependent-options/h8-300-options.rst   |   64 +
 .../machine-dependent-options/hppa-options.rst     |  245 +
 .../machine-dependent-options/ia-64-options.rst    |  261 ++
 .../ibm-rs-6000-and-powerpc-options.rst            | 1017 ++++
 .../machine-dependent-options/lm32-options.rst     |   35 +
 .../loongarch-options.rst                          |  191 +
 .../machine-dependent-options/m32c-options.rst     |   38 +
 .../machine-dependent-options/m32r-d-options.rst   |  137 +
 .../machine-dependent-options/m680x0-options.rst   |  407 ++
 .../machine-dependent-options/mcore-options.rst    |   66 +
 .../machine-dependent-options/mep-options.rst      |  167 +
 .../microblaze-options.rst                         |  121 +
 .../machine-dependent-options/mips-options.rst     |  986 ++++
 .../machine-dependent-options/mmix-options.rst     |   75 +
 .../machine-dependent-options/mn10300-options.rst  |   93 +
 .../machine-dependent-options/moxie-options.rst    |   31 +
 .../machine-dependent-options/msp430-options.rst   |  189 +
 .../machine-dependent-options/nds32-options.rst    |  116 +
 .../machine-dependent-options/nios-ii-options.rst  |  363 ++
 .../nvidia-ptx-options.rst                         |   98 +
 .../machine-dependent-options/openrisc-options.rst |   95 +
 .../options-for-system-v.rst                       |   43 +
 .../machine-dependent-options/pdp-11-options.rst   |   73 +
 .../machine-dependent-options/picochip-options.rst |   55 +
 .../machine-dependent-options/powerpc-options.rst  |   15 +
 .../machine-dependent-options/pru-options.rst      |   63 +
 .../machine-dependent-options/risc-v-options.rst   |  216 +
 .../machine-dependent-options/rl78-options.rst     |   91 +
 .../machine-dependent-options/rx-options.rst       |  209 +
 .../s-390-and-zseries-options.rst                  |  244 +
 .../machine-dependent-options/score-options.rst    |   51 +
 .../machine-dependent-options/sh-options.rst       |  444 ++
 .../solaris-2-options.rst                          |   42 +
 .../machine-dependent-options/sparc-options.rst    |  388 ++
 .../machine-dependent-options/v850-options.rst     |  207 +
 .../machine-dependent-options/vax-options.rst      |   35 +
 .../machine-dependent-options/visium-options.rst   |   73 +
 .../machine-dependent-options/vms-options.rst      |   38 +
 .../machine-dependent-options/vxworks-options.rst  |   45 +
 .../machine-dependent-options/x86-options.rst      | 1620 +++++++
 .../x86-windows-options.rst                        |   95 +
 .../xstormy16-options.rst                          |   19 +
 .../machine-dependent-options/xtensa-options.rst   |  138 +
 .../machine-dependent-options/zseries-options.rst  |   15 +
 gcc/doc/gcc/gcc-command-options/option-summary.rst | 1527 ++++++
 .../options-controlling-c++-dialect.rst            | 2133 +++++++++
 .../options-controlling-c-dialect.rst              |  544 +++
 ...ling-objective-c-and-objective-c++-dialects.rst |  316 ++
 .../options-controlling-the-kind-of-output.rst     |  732 +++
 .../options-controlling-the-preprocessor.rst       |   79 +
 .../options-for-code-generation-conventions.rst    |  713 +++
 .../options-for-debugging-your-program.rst         |  471 ++
 .../options-for-directory-search.rst               |  102 +
 .../gcc-command-options/options-for-linking.rst    |  407 ++
 .../options-that-control-optimization.rst          | 4857 +++++++++++++++++++
 .../options-that-control-static-analysis.rst       | 1067 +++++
 ...s-to-control-diagnostic-messages-formatting.rst |  899 ++++
 .../options-to-request-or-suppress-warnings.rst    | 4866 ++++++++++++++++++++
 .../passing-options-to-the-assembler.rst           |   27 +
 .../program-instrumentation-options.rst            | 1111 +++++
 ...bprocesses-and-the-switches-to-pass-to-them.rst |  687 +++
 .../using-precompiled-headers.rst                  |  132 +
 gcc/doc/gcc/gcc.rst                                |   47 +
 gcc/doc/gcc/gcov-dump.rst                          |   70 +
 gcc/doc/gcc/gcov-tool.rst                          |  209 +
 gcc/doc/gcc/gcov.rst                               |   53 +
 .../gcov/brief-description-of-gcov-data-files.rst  |   33 +
 ...-file-relocation-to-support-cross-profiling.rst |   43 +
 gcc/doc/gcc/gcov/introduction-to-gcov.rst          |   62 +
 gcc/doc/gcc/gcov/invoking-gcov.rst                 |  656 +++
 ...-test-coverage-in-freestanding-environments.rst |  391 ++
 .../gcc/gcov/using-gcov-with-gcc-optimization.rst  |   86 +
 gcc/doc/gcc/general-public-license-3.rst           |    6 +
 gcc/doc/gcc/gnu-free-documentation-license.rst     |    6 +
 gcc/doc/gcc/gnu-objective-c-features.rst           |   27 +
 .../compatibilityalias.rst                         |   26 +
 .../constant-string-objects.rst                    |   64 +
 .../gcc/gnu-objective-c-features/exceptions.rst    |   79 +
 .../gnu-objective-c-features/fast-enumeration.rst  |  221 +
 .../garbage-collection.rst                         |   81 +
 .../gnu-objective-c-runtime-api.rst                |   98 +
 .../load-executing-code-before-main.rst            |  141 +
 .../messaging-with-the-gnu-objective-c-runtime.rst |  145 +
 .../gnu-objective-c-features/synchronization.rst   |   36 +
 .../gcc/gnu-objective-c-features/type-encoding.rst |  280 ++
 gcc/doc/gcc/gnu.rst                                |    1 +
 gcc/doc/gcc/have-you-found-a-bug.rst               |   62 +
 gcc/doc/gcc/how-and-where-to-report-bugs.rst       |   13 +
 gcc/doc/gcc/how-to-get-help-with-gcc.rst           |   26 +
 gcc/doc/gcc/index.rst                              |   40 +
 gcc/doc/gcc/indices-and-tables.rst                 |    1 +
 gcc/doc/gcc/known-causes-of-trouble-with-gcc.rst   |   32 +
 .../actual-bugs-we-havent-fixed-yet.rst            |   14 +
 .../certain-changes-we-dont-want-to-make.rst       |  236 +
 .../common-misunderstandings-with-gnu-c.rst        |  296 ++
 .../disappointments-and-misunderstandings.rst      |  102 +
 .../fixed-header-files.rst                         |   39 +
 .../incompatibilities-of-gcc.rst                   |  233 +
 .../interoperation.rst                             |  153 +
 .../standard-libraries.rst                         |   33 +
 .../warning-messages-and-error-messages.rst        |   46 +
 .../gcc/language-standards-supported-by-gcc.rst    |   23 +
 .../c++-language.rst                               |   71 +
 .../c-language.rst                                 |  139 +
 .../d-language.rst                                 |   11 +
 .../go-language.rst                                |   10 +
 .../objective-c-and-objective-c++-languages.rst    |   62 +
 .../references-for-other-languages.rst             |   13 +
 gcc/doc/gcc/lto-dump.rst                           |  117 +
 .../gcc/programming-languages-supported-by-gcc.rst |   54 +
 gcc/doc/gcc/reporting-bugs.rst                     |   23 +
 .../analysis-and-optimization-of-gimple-tuples.rst |   44 +
 .../alias-analysis.rst                             |  104 +
 .../annotations.rst                                |   17 +
 .../memory-model.rst                               |   34 +
 .../ssa-operands.rst                               |  388 ++
 .../static-single-assignment.rst                   |  259 ++
 .../analysis-and-representation-of-loops.rst       |   27 +
 .../data-dependency-analysis.rst                   |  135 +
 .../iv-analysis-on-rtl.rst                         |   55 +
 .../loop-closed-ssa-form.rst                       |   47 +
 .../loop-manipulation.rst                          |   58 +
 .../loop-querying.rst                              |   81 +
 .../loop-representation.rst                        |  137 +
 .../number-of-iterations-analysis.rst              |   85 +
 .../scalar-evolutions.rst                          |   71 +
 gcc/doc/gccint/analyzer-internals.rst              |  419 ++
 gcc/doc/gccint/collect2.rst                        |   77 +
 gcc/doc/gccint/conf.py                             |   24 +
 gcc/doc/gccint/contributing-to-gcc-development.rst |    6 +
 gcc/doc/gccint/contributors-to-gcc.rst             |    6 +
 gcc/doc/gccint/control-flow-graph.rst              |   43 +
 gcc/doc/gccint/control-flow-graph/basic-blocks.rst |  141 +
 gcc/doc/gccint/control-flow-graph/edges.rst        |  241 +
 .../control-flow-graph/liveness-information.rst    |   48 +
 .../control-flow-graph/maintaining-the-cfg.rst     |  145 +
 .../control-flow-graph/profile-information.rst     |  112 +
 gcc/doc/gccint/copyright.rst                       |   25 +
 gcc/doc/gccint/debugging-the-analyzer.rst          |  141 +
 gcc/doc/gccint/funding.rst                         |    6 +
 gcc/doc/gccint/gcc-and-portability.rst             |   41 +
 gcc/doc/gccint/general-public-license-3.rst        |    6 +
 gcc/doc/gccint/generic.rst                         |   47 +
 gcc/doc/gccint/generic/attributes-in-trees.rst     |   35 +
 gcc/doc/gccint/generic/c-and-c++-trees.rst         |  886 ++++
 gcc/doc/gccint/generic/declarations.rst            |  346 ++
 gcc/doc/gccint/generic/deficiencies.rst            |   14 +
 gcc/doc/gccint/generic/expressions.rst             |  910 ++++
 gcc/doc/gccint/generic/functions.rst               |  212 +
 .../gccint/generic/language-dependent-trees.rst    |   25 +
 gcc/doc/gccint/generic/overview.rst                |  213 +
 gcc/doc/gccint/generic/statements.rst              |  516 +++
 gcc/doc/gccint/generic/types.rst                   |  299 ++
 gcc/doc/gccint/gimple-api.rst                      |   47 +
 gcc/doc/gccint/gimple.rst                          |   88 +
 .../gimple/adding-a-new-gimple-statement-code.rst  |   36 +
 .../class-hierarchy-of-gimple-statements.rst       |  150 +
 gcc/doc/gccint/gimple/exception-handling.rst       |   46 +
 gcc/doc/gccint/gimple/gimple-instruction-set.rst   |  106 +
 gcc/doc/gccint/gimple/gimple-sequences.rst         |   94 +
 .../gimple/manipulating-gimple-statements.rst      |  176 +
 gcc/doc/gccint/gimple/operands.rst                 |  319 ++
 gcc/doc/gccint/gimple/sequence-iterators.rst       |  223 +
 .../gimple/statement-and-operand-traversals.rst    |   62 +
 gcc/doc/gccint/gimple/temporaries.rst              |   43 +
 gcc/doc/gccint/gimple/tuple-representation.rst     |  242 +
 gcc/doc/gccint/gimple/tuple-specific-accessors.rst |   44 +
 .../gimple/tuple-specific-accessors/gimpleasm.rst  |   66 +
 .../tuple-specific-accessors/gimpleassign.rst      |  126 +
 .../gimple/tuple-specific-accessors/gimplebind.rst |   56 +
 .../gimple/tuple-specific-accessors/gimplecall.rst |  116 +
 .../tuple-specific-accessors/gimplecatch.rst       |   37 +
 .../gimple/tuple-specific-accessors/gimplecond.rst |   80 +
 .../tuple-specific-accessors/gimpledebug.rst       |  106 +
 .../tuple-specific-accessors/gimpleehfilter.rst    |   45 +
 .../gimple/tuple-specific-accessors/gimplegoto.rst |   21 +
 .../tuple-specific-accessors/gimplelabel.rst       |   23 +
 .../gimple/tuple-specific-accessors/gimplenop.rst  |   17 +
 .../gimpleompatomicload.rst                        |   31 +
 .../gimpleompatomicstore.rst                       |   22 +
 .../tuple-specific-accessors/gimpleompcontinue.rst |   43 +
 .../tuple-specific-accessors/gimpleompcritical.rst |   28 +
 .../tuple-specific-accessors/gimpleompfor.rst      |   97 +
 .../tuple-specific-accessors/gimpleompmaster.rst   |   14 +
 .../tuple-specific-accessors/gimpleompordered.rst  |   16 +
 .../tuple-specific-accessors/gimpleompparallel.rst |   76 +
 .../tuple-specific-accessors/gimpleompreturn.rst   |   23 +
 .../tuple-specific-accessors/gimpleompsection.rst  |   24 +
 .../tuple-specific-accessors/gimpleompsections.rst |   48 +
 .../tuple-specific-accessors/gimpleompsingle.rst   |   28 +
 .../gimple/tuple-specific-accessors/gimplephi.rst  |   41 +
 .../gimple/tuple-specific-accessors/gimpleresx.rst |   24 +
 .../tuple-specific-accessors/gimplereturn.rst      |   21 +
 .../tuple-specific-accessors/gimpleswitch.rst      |   52 +
 .../gimple/tuple-specific-accessors/gimpletry.rst  |   51 +
 .../gimplewithcleanupexpr.rst                      |   30 +
 gcc/doc/gccint/gnu-free-documentation-license.rst  |    6 +
 gcc/doc/gccint/guidelines-for-diagnostics.rst      |  598 +++
 gcc/doc/gccint/guidelines-for-options.rst          |   13 +
 gcc/doc/gccint/host-common.rst                     |   57 +
 gcc/doc/gccint/host-configuration.rst              |   32 +
 gcc/doc/gccint/host-filesystem.rst                 |  103 +
 gcc/doc/gccint/host-makefile-fragments.rst         |   14 +
 gcc/doc/gccint/host-misc.rst                       |   70 +
 gcc/doc/gccint/index.rst                           |   51 +
 gcc/doc/gccint/indices-and-tables.rst              |    1 +
 gcc/doc/gccint/interfacing-to-gcc-output.rst       |   71 +
 gcc/doc/gccint/introduction.rst                    |   26 +
 gcc/doc/gccint/language-front-ends-in-gcc.rst      |   39 +
 gcc/doc/gccint/link-time-optimization.rst          |   33 +
 .../link-time-optimization/design-overview.rst     |  123 +
 .../internal-flags-controlling-lto1.rst            |   42 +
 .../link-time-optimization/lto-file-sections.rst   |  110 +
 .../using-summary-information-in-ipa-passes.rst    |  206 +
 ...tions-linker-plugin-and-symbol-visibilities.rst |   91 +
 gcc/doc/gccint/machine-descriptions.rst            |   49 +
 .../c-statements-for-assembler-output.rst          |  122 +
 .../canonicalization-of-instructions.rst           |  152 +
 .../machine-descriptions/conditional-execution.rst |   98 +
 .../machine-descriptions/constant-definitions.rst  |  185 +
 .../defining-how-to-split-instructions.rst         |  374 ++
 .../defining-jump-instruction-patterns.rst         |   37 +
 .../defining-looping-instruction-patterns.rst      |  134 +
 .../defining-rtl-sequences-for-code-generation.rst |  206 +
 .../everything-about-instruction-patterns.rst      |  106 +
 .../machine-descriptions/example-of-defineinsn.rst |   54 +
 .../including-patterns-in-machine-descriptions.rst |   70 +
 .../instruction-attributes.rst                     | 1248 +++++
 .../interdependence-of-patterns.rst                |   43 +
 gcc/doc/gccint/machine-descriptions/iterators.rst  |  543 +++
 .../machine-specific-peephole-optimizers.rst       |  330 ++
 .../machine-descriptions/operand-constraints.rst   |  426 ++
 .../output-templates-and-operand-substitution.rst  |   99 +
 ...view-of-how-the-machine-description-is-used.rst |   47 +
 gcc/doc/gccint/machine-descriptions/predicates.rst |  343 ++
 .../gccint/machine-descriptions/rtl-template.rst   |  255 +
 .../rtl-templates-transformations.rst              |  225 +
 .../standard-pattern-names-for-generation.rst      | 3413 ++++++++++++++
 .../when-the-order-of-patterns-matters.rst         |   29 +
 gcc/doc/gccint/makefile-fragments.rst              |   37 +
 gcc/doc/gccint/match-and-simplify.rst              |   34 +
 .../memory-management-and-type-information.rst     |  103 +
 .../how-to-invoke-the-garbage-collector.rst        |   36 +
 .../marking-roots-for-the-garbage-collector.rst    |   28 +
 .../source-files-containing-type-information.rst   |   60 +
 .../support-for-inheritance.rst                    |   59 +
 ...pport-for-user-provided-gc-marking-routines.rst |  121 +
 .../the-inside-of-a-gty.rst                        |  324 ++
 .../troubleshooting-the-garbage-collector.rst      |   27 +
 gcc/doc/gccint/option-file-format.rst              |  175 +
 gcc/doc/gccint/option-properties.rst               |  376 ++
 gcc/doc/gccint/option-specification-files.rst      |   21 +
 .../gccint/passes-and-files-of-the-compiler.rst    |   27 +
 .../gimplification-pass.rst                        |   44 +
 .../inter-procedural-optimization-passes.rst       |  269 ++
 .../optimization-info.rst                          |  262 ++
 .../parsing-pass.rst                               |   80 +
 .../pass-manager.rst                               |   42 +
 .../rtl-passes.rst                                 |  275 ++
 .../tree-ssa-passes.rst                            |  477 ++
 gcc/doc/gccint/plugins.rst                         |   35 +
 gcc/doc/gccint/plugins/building-gcc-plugins.rst    |   97 +
 .../controlling-which-passes-are-being-run.rst     |   16 +
 .../plugins/giving-information-about-a-plugin.rst  |   24 +
 .../interacting-with-the-gcc-garbage-collector.rst |   37 +
 .../plugins/interacting-with-the-pass-manager.rst  |   57 +
 .../plugins/keeping-track-of-available-passes.rst  |   17 +
 gcc/doc/gccint/plugins/loading-plugins.rst         |   31 +
 gcc/doc/gccint/plugins/plugin-api.rst              |  213 +
 .../recording-information-about-pass-execution.rst |   20 +
 .../registering-custom-attributes-or-pragmas.rst   |   73 +
 gcc/doc/gccint/rtl-representation.rst              |   48 +
 .../rtl-representation/access-to-operands.rst      |   73 +
 .../access-to-special-operands.rst                 |  188 +
 .../assembler-instructions-as-expressions.rst      |   45 +
 gcc/doc/gccint/rtl-representation/bit-fields.rst   |   48 +
 .../rtl-representation/comparison-operations.rst   |  112 +
 .../constant-expression-types.rst                  |  313 ++
 gcc/doc/gccint/rtl-representation/conversions.rst  |  152 +
 gcc/doc/gccint/rtl-representation/declarations.rst |   27 +
 .../embedded-side-effects-on-addresses.rst         |  100 +
 .../flags-in-an-rtl-expression.rst                 |  447 ++
 gcc/doc/gccint/rtl-representation/insns.rst        |  624 +++
 .../gccint/rtl-representation/machine-modes.rst    |  635 +++
 .../on-the-side-ssa-form-for-rtl.rst               |  748 +++
 gcc/doc/gccint/rtl-representation/reading-rtl.rst  |   28 +
 .../rtl-representation/registers-and-memory.rst    |  451 ++
 .../rtl-representation/rtl-classes-and-formats.rst |  192 +
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 .../gccint/rtl-representation/rtl-object-types.rst |   84 +
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 .../rtl-representation/side-effect-expressions.rst |  374 ++
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 .../sizes-and-offsets-as-runtime-invariants.rst    |   51 +
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 .../comparisons-involving-polyint.rst              |  324 ++
 .../computing-bounds-on-polyints.rst               |   34 +
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 .../converting-polyints.rst                        |   91 +
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 .../miscellaneous-polyint-routines.rst             |   16 +
 .../overview-of-polyint.rst                        |   78 +
 .../source-tree-structure-and-build-system.rst     |   21 +
 .../configure-terms-and-history.rst                |   64 +
 .../the-gcc-subdirectory.rst                       |   28 +
 .../anatomy-of-a-language-front-end.rst            |  281 ++
 .../anatomy-of-a-target-back-end.rst               |  116 +
 .../build-system-in-the-gcc-directory.rst          |   14 +
 .../building-documentation.rst                     |  235 +
 .../configuration-in-the-gcc-directory.rst         |  127 +
 .../headers-installed-by-gcc.rst                   |   50 +
 ...e-files-and-headers-under-the-gcc-directory.rst |   15 +
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 .../the-gcc-subdirectory/subdirectories-of-gcc.rst |   55 +
 .../top-level-source-directory.rst                 |  135 +
 .../gccint/standard-header-file-directories.rst    |   35 +
 gcc/doc/gccint/static-analyzer.rst                 |   19 +
 gcc/doc/gccint/target-macros.rst                   |   60 +
 .../adding-support-for-named-address-spaces.rst    |  163 +
 gcc/doc/gccint/target-macros/addressing-modes.rst  |  824 ++++
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 .../gccint/target-macros/anchored-addresses.rst    |   92 +
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 .../controlling-debugging-information-format.rst   |  306 ++
 .../controlling-the-compilation-driver-gcc.rst     |  482 ++
 .../cross-compilation-and-floating-point.rst       |   73 +
 gcc/doc/gccint/target-macros/d-abi-parameters.rst  |  111 +
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 ...ata-structures-for-per-function-information.rst |   62 +
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 .../defining-the-output-assembler-language.rst     |   27 +
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 ...ividing-the-output-into-sections-texts-data.rst |  445 ++
 gcc/doc/gccint/target-macros/emulating-tls.rst     |  125 +
 .../implementing-the-varargs-macros.rst            |  192 +
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 ...rs-for-precompiled-header-validity-checking.rst |   63 +
 .../target-macros/position-independent-code.rst    |   53 +
 gcc/doc/gccint/target-macros/register-classes.rst  |  801 ++++
 gcc/doc/gccint/target-macros/register-usage.rst    |  563 +++
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 .../exception-handling-support.rst                 |  137 +
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 .../passing-function-arguments-on-the-stack.rst    |  193 +
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 .../registers-that-address-the-stack-frame.rst     |  198 +
 .../shrink-wrapping-separate-components.rst        |   93 +
 .../specifying-how-stack-checking-is-done.rst      |  118 +
 .../stack-smashing-protection.rst                  |   75 +
 gcc/doc/gccint/target-macros/storage-layout.rst    |  729 +++
 .../target-macros/support-for-nested-functions.rst |  222 +
 .../target-macros/the-global-targetm-variable.rst  |   65 +
 gcc/doc/gccint/target-makefile-fragments.rst       |  245 +
 gcc/doc/gccint/testsuites.rst                      |   31 +
 .../gccint/testsuites/ada-language-testsuites.rst  |   38 +
 .../gccint/testsuites/c-language-testsuites.rst    |  113 +
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 .../commands-for-use-in-dg-final.rst               |  291 ++
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 .../selecting-targets-to-which-a-test-applies.rst  |  106 +
 .../syntax-and-descriptions-of-test-directives.rst |  311 ++
 .../variants-of-dg-require-support.rst             |   83 +
 .../testsuites/idioms-used-in-testsuite-code.rst   |   84 +
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 .../gccint/testsuites/support-for-testing-gcov.rst |   72 +
 .../support-for-testing-gimple-passes.rst          |   55 +
 ...support-for-testing-link-time-optimizations.rst |   46 +
 ...-for-testing-profile-directed-optimizations.rst |   51 +
 .../testsuites/support-for-testing-rtl-passes.rst  |   48 +
 ...-for-torture-testing-using-multiple-options.rst |   52 +
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 ...utines-for-decimal-floating-point-emulation.rst |  312 ++
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 .../routines-for-floating-point-emulation.rst      |  283 ++
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 gcc/doc/gccint/the-language.rst                    |  384 ++
 gcc/doc/gccint/user-experience-guidelines.rst      |   30 +
 gcc/doc/install/binaries.rst                       |   54 +
 gcc/doc/install/building.rst                       |   67 +
 .../install/building/building-a-cross-compiler.rst |   74 +
 .../building/building-a-native-compiler.rst        |  191 +
 gcc/doc/install/building/building-in-parallel.rst  |   15 +
 .../install/building/building-the-ada-compiler.rst |    9 +
 .../install/building/building-the-d-compiler.rst   |    9 +
 .../building/building-with-profile-feedback.rst    |   34 +
 gcc/doc/install/conf.py                            |   24 +
 gcc/doc/install/configuration.rst                  | 2098 +++++++++
 gcc/doc/install/copyright.rst                      |   24 +
 gcc/doc/install/downloading-gcc.rst                |   42 +
 gcc/doc/install/final-installation.rst             |  128 +
 gcc/doc/install/gnu-free-documentation-license.rst |    6 +
 ...-target-specific-installation-notes-for-gcc.rst | 1336 ++++++
 ...can-you-run-the-testsuite-on-selected-tests.rst |   46 +
 gcc/doc/install/how-to-interpret-test-results.rst  |   32 +
 gcc/doc/install/index.rst                          |   27 +
 gcc/doc/install/indices-and-tables.rst             |    1 +
 gcc/doc/install/installing-gcc.rst                 |   39 +
 ...ing-options-and-running-multiple-testsuites.rst |   74 +
 gcc/doc/install/prerequisites.rst                  |  319 ++
 gcc/doc/install/submitting-test-results.rst        |   22 +
 gcc/doc/install/testing.rst                        |   69 +
 .../code-that-interacts-with-the-user.rst          |   15 +
 .../doc/gfc-internals/command-line-options.rst     |   30 +
 gcc/fortran/doc/gfc-internals/conf.py              |   24 +
 gcc/fortran/doc/gfc-internals/copyright.rst        |   25 +
 gcc/fortran/doc/gfc-internals/error-handling.rst   |   75 +
 .../doc/gfc-internals/frontend-data-structures.rst |   23 +
 ...-the-intermediate-language-for-later-stages.rst |   24 +
 .../accessing-declarations.rst                     |   16 +
 .../basic-data-structures.rst                      |   67 +
 .../converting-expressions-to-tree.rst             |   48 +
 .../translating-statements.rst                     |   14 +
 gcc/fortran/doc/gfc-internals/gfccode.rst          |  146 +
 gcc/fortran/doc/gfc-internals/gfcexpr.rst          |  156 +
 .../gnu-free-documentation-license.rst             |    6 +
 gcc/fortran/doc/gfc-internals/index.rst            |   24 +
 .../doc/gfc-internals/indices-and-tables.rst       |    1 +
 .../internals-of-fortran-2003-oop-features.rst     |   15 +
 gcc/fortran/doc/gfc-internals/introduction.rst     |   32 +
 .../doc/gfc-internals/symbol-versioning.rst        |   63 +
 .../the-libgfortran-runtime-library.rst            |   14 +
 .../doc/gfc-internals/type-bound-operators.rst     |   33 +
 .../doc/gfc-internals/type-bound-procedures.rst    |  101 +
 gcc/fortran/doc/gfortran/about-gnu-fortran.rst     |  115 +
 gcc/fortran/doc/gfortran/coarray-programming.rst   |   17 +
 .../doc/gfortran/compiler-characteristics.rst      |   27 +
 .../compiler-characteristics/asynchronous-i-o.rst  |   21 +
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 ...nternal-representation-of-logical-variables.rst |   24 +
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 ...-and-min-intrinsics-with-real-nan-arguments.rst |   21 +
 .../thread-safety-of-the-runtime-library.rst       |   53 +
 gcc/fortran/doc/gfortran/conf.py                   |   30 +
 gcc/fortran/doc/gfortran/contributing.rst          |   28 +
 .../doc/gfortran/contributors-to-gnu-fortran.rst   |  109 +
 gcc/fortran/doc/gfortran/copyright.rst             |   25 +
 .../extensions-implemented-in-gnu-fortran.rst      | 1535 ++++++
 .../extensions-not-implemented-in-gnu-fortran.rst  |  186 +
 gcc/fortran/doc/gfortran/extensions.rst            |   24 +
 .../doc/gfortran/function-abi-documentation.rst    | 1526 ++++++
 gcc/fortran/doc/gfortran/funding.rst               |    6 +
 .../doc/gfortran/general-public-license-3.rst      |    6 +
 gcc/fortran/doc/gfortran/gnu-fortran-and-gcc.rst   |   48 +
 .../doc/gfortran/gnu-fortran-command-options.rst   |   33 +
 .../gnu-fortran-command-options/description.rst    |   39 +
 .../enable-and-customize-preprocessing.rst         |  298 ++
 .../environment-variables-affecting-gfortran.rst   |   24 +
 .../influencing-runtime-behavior.rst               |   67 +
 .../influencing-the-linking-step.rst               |   37 +
 .../gnu-fortran-command-options/option-summary.rst |  104 +
 .../options-controlling-fortran-dialect.rst        |  411 ++
 .../options-for-code-generation-conventions.rst    |  583 +++
 ...s-for-debugging-your-program-or-gnu-fortran.rst |  134 +
 .../options-for-directory-search.rst               |   54 +
 ...s-for-interoperability-with-other-languages.rst |   63 +
 ...-to-request-or-suppress-errors-and-warnings.rst |  411 ++
 .../gfortran/gnu-fortran-compiler-directives.rst   |  174 +
 .../gfortran/gnu-free-documentation-license.rst    |    6 +
 gcc/fortran/doc/gfortran/index.rst                 |   56 +
 gcc/fortran/doc/gfortran/indices-and-tables.rst    |    1 +
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 gcc/fortran/doc/gfortran/intrinsic-modules.rst     |   20 +
 ...eexceptions-ieeearithmetic-and-ieeefeatures.rst |   29 +
 .../doc/gfortran/intrinsic-modules/isocbinding.rst |  227 +
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 gcc/fortran/doc/gfortran/intrinsic-procedures.rst  |  299 ++
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 .../the-libitm-abi/library-design-principles.rst   |   61 +
 libitm/doc/the-libitm-abi/memory-model.rst         |   18 +
 libitm/doc/the-libitm-abi/non-objectives.rst       |    7 +
 libitm/doc/the-libitm-abi/objectives.rst           |    7 +
 libitm/doc/the-libitm-abi/sample-code.rst          |   10 +
 .../doc/the-libitm-abi/types-and-macros-list.rst   |   10 +
 libitm/doc/tm-methods-and-method-groups.rst        |   47 +
 libquadmath/doc/conf.py                            |   24 +
 libquadmath/doc/copyright.rst                      |   18 +
 libquadmath/doc/gnu-free-documentation-license.rst |    6 +
 libquadmath/doc/i-o-library-routines.rst           |   15 +
 libquadmath/doc/index.rst                          |   23 +
 libquadmath/doc/indices-and-tables.rst             |    1 +
 libquadmath/doc/introduction.rst                   |    7 +
 libquadmath/doc/math-library-routines.rst          |  104 +
 libquadmath/doc/quadmathsnprintf.rst               |   74 +
 libquadmath/doc/reporting-bugs.rst                 |   12 +
 libquadmath/doc/strtoflt128.rst                    |   40 +
 libquadmath/doc/typedef-and-constants.rst          |   43 +
 1334 files changed, 176969 insertions(+)

diff --git a/doc/Makefile b/doc/Makefile
new file mode 100644
index 00000000000..9e305a8e7da
--- /dev/null
+++ b/doc/Makefile
@@ -0,0 +1,97 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS   ?= -j auto -q
+SPHINXBUILD  ?= sphinx-build
+PAPER        ?=
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_elements.papersize=a4paper
+PAPEROPT_letter = -D latex_elements.papersize=letterpaper
+# $(O) is meant as a shortcut for $(SPHINXOPTS)
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+# the i18n builder cannot share the environment and doctrees with the others
+I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+
+.PHONY: help
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html        to make standalone HTML files"
+	@echo "  dirhtml     to make HTML files named index.html in directories"
+	@echo "  singlehtml  to make a single large HTML file"
+	@echo "  pickle      to make pickle files"
+	@echo "  json        to make JSON files"
+	@echo "  htmlhelp    to make HTML files and an HTML help project"
+	@echo "  qthelp      to make HTML files and a qthelp project"
+	@echo "  applehelp   to make an Apple Help Book"
+	@echo "  devhelp     to make HTML files and a Devhelp project"
+	@echo "  epub        to make an epub"
+	@echo "  latex       to make LaTeX files (you can set PAPER=a4 or PAPER=letter)"
+	@echo "  latexpdf    to make LaTeX files and then PDFs out of them"
+	@echo "  latexpdfja  to make LaTeX files and run them through platex/dvipdfmx"
+	@echo "  lualatexpdf to make LaTeX files and run them through lualatex"
+	@echo "  xelatexpdf  to make LaTeX files and run them through xelatex"
+	@echo "  text        to make text files"
+	@echo "  man         to make manual pages"
+	@echo "  texinfo     to make Texinfo files"
+	@echo "  info        to make Texinfo files and run them through makeinfo"
+	@echo "  gettext     to make PO message catalogs"
+	@echo "  changes     to make an overview of all changed/added/deprecated items"
+	@echo "  xml         to make Docutils-native XML files"
+	@echo "  pseudoxml   to make pseudoxml-XML files for display purposes"
+	@echo "  linkcheck   to check all external links for integrity"
+	@echo "  doctest     to run all doctests embedded in the documentation (if enabled)"
+	@echo "  coverage    to run coverage check of the documentation (if enabled)"
+	@echo "  dummy       to check syntax errors of document sources"
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILDDIR)
+
+.PHONY: latexpdf
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	$(MAKE) LATEXMKOPTS="-interaction=nonstopmode -f" -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: latexpdfja
+latexpdfja:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through platex and dvipdfmx..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: lualatexpdf
+lualatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through lualatex..."
+	$(MAKE) PDFLATEX=lualatex -C $(BUILDDIR)/latex all-pdf
+	@echo "lualatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: xelatexpdf
+xelatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through xelatex..."
+	$(MAKE) PDFLATEX=xelatex -C $(BUILDDIR)/latex all-pdf
+	@echo "xelatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: info
+info:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo "Running Texinfo files through makeinfo..."
+	make -C $(BUILDDIR)/texinfo info
+	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
+
+.PHONY: gettext
+gettext:
+	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+
+# Catch-all target: route all unknown targets to Sphinx
+.PHONY: Makefile
+%: Makefile
+	$(SPHINXBUILD) -b "$@" $(ALLSPHINXOPTS) "$(BUILDDIR)/$@"
+
diff --git a/doc/_static/custom.css b/doc/_static/custom.css
new file mode 100644
index 00000000000..1282a993e2a
--- /dev/null
+++ b/doc/_static/custom.css
@@ -0,0 +1,11 @@
+.sidebar-brand-text {
+  font-size: 13pt;
+}
+
+.literal {
+  white-space: nowrap !important;
+}
+
+.wy-nav-content {
+  max-width: initial;
+}
diff --git a/doc/baseconf.py b/doc/baseconf.py
new file mode 100644
index 00000000000..2eea8298dae
--- /dev/null
+++ b/doc/baseconf.py
@@ -0,0 +1,230 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import os
+import subprocess
+import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+# gccint needs a deeper stack limit
+sys.setrecursionlimit(2000)
+
+# -- Project information -----------------------------------------------------
+
+# The full version, including alpha/beta/rc tags
+
+# FIXME
+folder = os.path.dirname(os.path.realpath(__file__))
+gcc_srcdir = os.path.join(folder, './objdir')
+
+
+def __read_file(name):
+    path = os.path.join(gcc_srcdir, name)
+    if os.path.exists(path):
+        return open(path).read().strip()
+    else:
+        return ''
+
+
+def __get_git_revision():
+    try:
+        r = subprocess.check_output('git rev-parse --short HEAD', shell=True, encoding='utf8',
+                                    stderr=subprocess.DEVNULL)
+        return r.strip()
+    except subprocess.CalledProcessError:
+        return None
+
+
+def __get_builder_name():
+    if '-b' in sys.argv:
+        return sys.argv[sys.argv.index('-b') + 1]
+    else:
+        return None
+
+
+gcc_BASEVER = __read_file('BASE-VER')
+gcc_DEVPHASE = __read_file('DEV-PHASE')
+gcc_DATESTAMP = __read_file('DATESTAMP')
+gcc_REVISION = __read_file('REVISION')
+
+VERSION_PACKAGE = os.getenv('VERSION_PACKAGE', '(GCC)')
+BUGURL = os.getenv('BUGURL', 'https://gcc.gnu.org/bugs/')
+MONOCHROMATIC = os.getenv('MONOCHROMATIC')
+
+# The short X.Y version.
+version = gcc_BASEVER
+
+# The full version, including alpha/beta/rc tags.
+release = ('%s (%s %s%s)'
+           % (gcc_BASEVER, gcc_DEVPHASE, gcc_DATESTAMP,
+              (' %s' % gcc_REVISION) if gcc_REVISION else ''))
+
+rst_prolog = r'''
+.. |gol| raw:: latex
+
+               \\
+.. |nbsp| unicode:: 0xA0
+  :trim:
+'''
+
+needs_sphinx = '5.3'
+
+rst_epilog = '''
+.. |gcc_version| replace:: %s
+.. |package_version| replace:: %s
+.. |bugurl| replace:: %s
+.. |needs_sphinx| replace:: %s
+''' % (gcc_BASEVER, VERSION_PACKAGE, BUGURL, needs_sphinx)
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'gcc_sphinx',
+    'sphinx.ext.intersphinx',
+    'sphinx.ext.extlinks',
+    'sphinx.ext.todo',
+]
+
+if __get_builder_name() == 'html':
+    extensions.append('sphinx_copybutton')
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ['_build']
+
+# Do not highlight by default
+highlight_language = 'none'
+
+# Select C++ as a primary domain
+primary_domain = 'cpp'
+
+cpp_id_attributes = ['HOST_WIDE_INT', '__memx']
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'furo'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+html_theme_options = {
+    'navigation_with_keys': True,
+}
+
+html_logo = '../logo.svg'
+
+html_favicon = '../favicon.ico'
+
+html_last_updated_fmt = ''
+
+html_context = {
+    'commit': __get_git_revision()
+}
+
+html_static_path = [
+    '../_static'
+]
+
+html_css_files = [
+    'custom.css'
+]
+
+# By default, do not generate any manual pages
+man_pages = []
+
+# FIXME: handle WARNINGs: unknown option issues and cross refs
+suppress_warnings = [
+    'ref.option',
+]
+
+# Use xelatex by default
+latex_engine = 'xelatex'
+
+latex_logo = '../logo.pdf'
+
+latex_elements = {
+    'pointsize': '11pt',
+    'fontpkg': r'''
+\setmonofont[Scale=0.8]{DejaVu Sans Mono}
+''',
+    'preamble': r'''
+\fvset{formatcom=\let\textbf\relax}
+\protected\def\sphinxcrossref#1{#1}
+''',
+}
+
+if MONOCHROMATIC:
+    latex_elements['sphinxsetup'] = r'''
+TitleColor={black},
+InnerLinkColor={rgb}{0.0, 0.2, 0.6},
+OuterLinkColor={rgb}{0.0, 0.2, 0.6},
+'''
+
+latex_table_style = ['colorrows']
+
+texinfo_cross_references = False
+
+texinfo_elements = {'preamble': """
+@definfoenclose strong,*,*
+@definfoenclose emph,','
+"""
+}
+
+# Use default as RTD theme uses default as well
+pygments_style = 'bw' if MONOCHROMATIC else 'default'
+
+option_emphasise_placeholders = True
+
+# Ignore GitHub domain for link checking:
+# https://github.com/sphinx-doc/sphinx/issues/9016
+linkcheck_ignore = [
+    'https://github.com/.*#.*'
+]
+
+USER_LEVEL_DOCS = ('install', 'gcc', 'gfortran', 'cpp', 'gnat_rm', 'gnat_ugn',
+                   'gccgo', 'libgomp', 'libquadmath', 'libgccjit')
+INTERNAL_DOCS = ('gccint', 'cppinternals', 'gfc-internals', 'gnat-style')
+
+# Cross manual reference mapping
+intersphinx_mapping = {}
+for manual in USER_LEVEL_DOCS + INTERNAL_DOCS:
+    intersphinx_mapping[manual] = (f'https://splichal.eu/scripts/sphinx/{manual}/_build/html/', None)
+
+# Custom references
+extlinks = {
+    'P': ('https://wg21.link/p%s', 'P%s'),
+    'PR': ('https://gcc.gnu.org/PR%s', 'PR%s'),
+    'openmp': ('https://openmp.org/specifications/#%s', 'OpenMP specification v%s'),
+    'openacc': ('https://openacc.org/specification#%s', 'OpenACC specification v%s'),
+}
+
+extlinks_detect_hardcoded_links = True
+
+# Set common settings where we need NAME of the documentation
+def set_common(name, module):
+    module['tags'].add(name)
+    if gcc_DEVPHASE == 'experimental':
+        module['todo_include_todos'] = True
+        module['tags'].add('development')
+
+    html_theme_options['source_edit_link'] = f'https://splichal.eu/scripts/sphinx/{name}' \
+                                               '/_build/html/_sources/{filename}.txt'
diff --git a/doc/bsd.rst b/doc/bsd.rst
new file mode 100644
index 00000000000..6d53fa6271c
--- /dev/null
+++ b/doc/bsd.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+BSD
+===
+
+Copyright (C) 1990 Regents of the University of California.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+#. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+#. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+#. [rescinded 22 July 1999]
+
+#. Neither the name of the University nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS 'AS IS' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
\ No newline at end of file
diff --git a/doc/contrib.rst b/doc/contrib.rst
new file mode 100644
index 00000000000..273d61717b1
--- /dev/null
+++ b/doc/contrib.rst
@@ -0,0 +1,1273 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: contributors
+
+.. _contributors:
+
+Contributors to GCC
+===================
+
+The GCC project would like to thank its many contributors.  Without them the
+project would not have been nearly as successful as it has been.  Any omissions
+in this list are accidental.  Feel free to contact
+law@redhat.com or gerald@pfeifer.com if you have been left
+out or some of your contributions are not listed.  Please keep this list in
+alphabetical order.
+
+* Analog Devices helped implement the support for complex data types
+  and iterators.
+
+* John David Anglin for threading-related fixes and improvements to
+  libstdc++-v3, and the HP-UX port.
+
+* James van Artsdalen wrote the code that makes efficient use of
+  the Intel 80387 register stack.
+
+* Abramo and Roberto Bagnara for the SysV68 Motorola 3300 Delta Series
+  port.
+
+* Alasdair Baird for various bug fixes.
+
+* Giovanni Bajo for analyzing lots of complicated C++ problem reports.
+
+* Peter Barada for his work to improve code generation for new
+  ColdFire cores.
+
+* Gerald Baumgartner added the signature extension to the C++ front end.
+
+* Godmar Back for his Java improvements and encouragement.
+
+* Scott Bambrough for help porting the Java compiler.
+
+* Wolfgang Bangerth for processing tons of bug reports.
+
+* Jon Beniston for his Microsoft Windows port of Java and port to Lattice Mico32.
+
+* Daniel Berlin for better DWARF 2 support, faster/better optimizations,
+  improved alias analysis, plus migrating GCC to Bugzilla.
+
+* Geoff Berry for his Java object serialization work and various patches.
+
+* David Binderman tests weekly snapshots of GCC trunk against Fedora Rawhide
+  for several architectures.
+
+* Laurynas Biveinis for memory management work and DJGPP port fixes.
+
+* Uros Bizjak for the implementation of x87 math built-in functions and
+  for various middle end and i386 back end improvements and bug fixes.
+
+* Eric Blake for helping to make GCJ and libgcj conform to the
+  specifications.
+
+* Janne Blomqvist for contributions to GNU Fortran.
+
+* Hans-J. Boehm for his garbage collector, IA-64 libffi port, and other
+  Java work.
+
+* Segher Boessenkool for helping maintain the PowerPC port and the
+  instruction combiner plus various contributions to the middle end.
+
+* Neil Booth for work on cpplib, lang hooks, debug hooks and other
+  miscellaneous clean-ups.
+
+* Steven Bosscher for integrating the GNU Fortran front end into GCC and for
+  contributing to the tree-ssa branch.
+
+* Eric Botcazou for fixing middle- and backend bugs left and right.
+
+* Per Bothner for his direction via the steering committee and various
+  improvements to the infrastructure for supporting new languages.  Chill
+  front end implementation.  Initial implementations of
+  cpplib, fix-header, config.guess, libio, and past C++ library (libg++)
+  maintainer.  Dreaming up, designing and implementing much of GCJ.
+
+* Devon Bowen helped port GCC to the Tahoe.
+
+* Don Bowman for mips-vxworks contributions.
+
+* James Bowman for the FT32 port.
+
+* Dave Brolley for work on cpplib and Chill.
+
+* Paul Brook for work on the ARM architecture and maintaining GNU Fortran.
+
+* Robert Brown implemented the support for Encore 32000 systems.
+
+* Christian Bruel for improvements to local store elimination.
+
+* Herman A.J. ten Brugge for various fixes.
+
+* Joerg Brunsmann for Java compiler hacking and help with the GCJ FAQ.
+
+* Joe Buck for his direction via the steering committee from its creation
+  to 2013.
+
+* Iain Buclaw for the D frontend.
+
+* Craig Burley for leadership of the G77 Fortran effort.
+
+* Tobias Burnus for contributions to GNU Fortran.
+
+* Stephan Buys for contributing Doxygen notes for libstdc++.
+
+* Paolo Carlini for libstdc++ work: lots of efficiency improvements to
+  the C++ strings, streambufs and formatted I/O, hard detective work on
+  the frustrating localization issues, and keeping up with the problem reports.
+
+* John Carr for his alias work, SPARC hacking, infrastructure improvements,
+  previous contributions to the steering committee, loop optimizations, etc.
+
+* Stephane Carrez for 68HC11 and 68HC12 ports.
+
+* Steve Chamberlain for support for the Renesas SH and H8 processors
+  and the PicoJava processor, and for GCJ config fixes.
+
+* Glenn Chambers for help with the GCJ FAQ.
+
+* John-Marc Chandonia for various libgcj patches.
+
+* Denis Chertykov for contributing and maintaining the AVR port, the first GCC port
+  for an 8-bit architecture.
+
+* Kito Cheng for his work on the RISC-V port, including bringing up the test
+  suite and maintenance.
+
+* Scott Christley for his Objective-C contributions.
+
+* Eric Christopher for his Java porting help and clean-ups.
+
+* Branko Cibej for more warning contributions.
+
+* The `GNU Classpath project <https://www.gnu.org/software/classpath/>`_
+  for all of their merged runtime code.
+
+* Nick Clifton for arm, mcore, fr30, v850, m32r, msp430 rx work,
+  :option:`--help`, and other random hacking.
+
+* Michael Cook for libstdc++ cleanup patches to reduce warnings.
+
+* R. Kelley Cook for making GCC buildable from a read-only directory as
+  well as other miscellaneous build process and documentation clean-ups.
+
+* Ralf Corsepius for SH testing and minor bug fixing.
+
+* François-Xavier Coudert for contributions to GNU Fortran.
+
+* Stan Cox for care and feeding of the x86 port and lots of behind
+  the scenes hacking.
+
+* Alex Crain provided changes for the 3b1.
+
+* Ian Dall for major improvements to the NS32k port.
+
+* Paul Dale for his work to add uClinux platform support to the
+  m68k backend.
+
+* Palmer Dabbelt for his work maintaining the RISC-V port.
+
+* Dario Dariol contributed the four varieties of sample programs
+  that print a copy of their source.
+
+* Russell Davidson for fstream and stringstream fixes in libstdc++.
+
+* Bud Davis for work on the G77 and GNU Fortran compilers.
+
+* Mo DeJong for GCJ and libgcj bug fixes.
+
+* Jerry DeLisle for contributions to GNU Fortran.
+
+* DJ Delorie for the DJGPP port, build and libiberty maintenance,
+  various bug fixes, and the M32C, MeP, MSP430, and RL78 ports.
+
+* Arnaud Desitter for helping to debug GNU Fortran.
+
+* Gabriel Dos Reis for contributions to G++, contributions and
+  maintenance of GCC diagnostics infrastructure, libstdc++-v3,
+  including ``valarray<>``, ``complex<>``, maintaining the numerics library
+  (including that pesky ``<limits>`` :-) and keeping up-to-date anything
+  to do with numbers.
+
+* Ulrich Drepper for his work on glibc, testing of GCC using glibc, ISO C99
+  support, CFG dumping support, etc., plus support of the C++ runtime
+  libraries including for all kinds of C interface issues, contributing and
+  maintaining ``complex<>``, sanity checking and disbursement, configuration
+  architecture, libio maintenance, and early math work.
+
+* François Dumont for his work on libstdc++-v3, especially maintaining and
+  improving ``debug-mode`` and associative and unordered containers.
+
+* Zdenek Dvorak for a new loop unroller and various fixes.
+
+* Michael Eager for his work on the Xilinx MicroBlaze port.
+
+* Richard Earnshaw for his ongoing work with the ARM.
+
+* David Edelsohn for his direction via the steering committee, ongoing work
+  with the RS6000/PowerPC port, help cleaning up Haifa loop changes,
+  doing the entire AIX port of libstdc++ with his bare hands, and for
+  ensuring GCC properly keeps working on AIX.
+
+* Kevin Ediger for the floating point formatting of num_put::do_put in
+  libstdc++.
+
+* Phil Edwards for libstdc++ work including configuration hackery,
+  documentation maintainer, chief breaker of the web pages, the occasional
+  iostream bug fix, and work on shared library symbol versioning.
+
+* Paul Eggert for random hacking all over GCC.
+
+* Mark Elbrecht for various DJGPP improvements, and for libstdc++
+  configuration support for locales and fstream-related fixes.
+
+* Vadim Egorov for libstdc++ fixes in strings, streambufs, and iostreams.
+
+* Christian Ehrhardt for dealing with bug reports.
+
+* Ben Elliston for his work to move the Objective-C runtime into its
+  own subdirectory and for his work on autoconf.
+
+* Revital Eres for work on the PowerPC 750CL port.
+
+* Marc Espie for OpenBSD support.
+
+* Doug Evans for much of the global optimization framework, arc, m32r,
+  and SPARC work.
+
+* Christopher Faylor for his work on the Cygwin port and for caring and
+  feeding the gcc.gnu.org box and saving its users tons of spam.
+
+* Fred Fish for BeOS support and Ada fixes.
+
+* Ivan Fontes Garcia for the Portuguese translation of the GCJ FAQ.
+
+* Peter Gerwinski for various bug fixes and the Pascal front end.
+
+* Kaveh R. Ghazi for his direction via the steering committee, amazing
+  work to make :samp:`-W -Wall -W* -Werror` useful, and
+  testing GCC on a plethora of platforms.  Kaveh extends his gratitude to
+  the CAIP Center at Rutgers University for providing him with computing
+  resources to work on Free Software from the late 1980s to 2010.
+
+* John Gilmore for a donation to the FSF earmarked improving GNU Java.
+
+* Judy Goldberg for c++ contributions.
+
+* Torbjorn Granlund for various fixes and the c-torture testsuite,
+  multiply- and divide-by-constant optimization, improved long long
+  support, improved leaf function register allocation, and his direction
+  via the steering committee.
+
+* Jonny Grant for improvements to ``collect2's`` :option:`--help` documentation.
+
+* Anthony Green for his :option:`-Os` contributions, the moxie port, and
+  Java front end work.
+
+* Stu Grossman for gdb hacking, allowing GCJ developers to debug Java code.
+
+* Michael K. Gschwind contributed the port to the PDP-11.
+
+* Richard Biener for his ongoing middle-end contributions and bug fixes
+  and for release management.
+
+* Ron Guilmette implemented the :command:`protoize` and :command:`unprotoize`
+  tools, the support for DWARF 1 symbolic debugging information, and much of
+  the support for System V Release 4.  He has also worked heavily on the
+  Intel 386 and 860 support.
+
+* Sumanth Gundapaneni for contributing the CR16 port.
+
+* Mostafa Hagog for Swing Modulo Scheduling (SMS) and post reload GCSE.
+
+* Bruno Haible for improvements in the runtime overhead for EH, new
+  warnings and assorted bug fixes.
+
+* Andrew Haley for his amazing Java compiler and library efforts.
+
+* Chris Hanson assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Michael Hayes for various thankless work he's done trying to get
+  the c30/c40 ports functional.  Lots of loop and unroll improvements and
+  fixes.
+
+* Dara Hazeghi for wading through myriads of target-specific bug reports.
+
+* Kate Hedstrom for staking the G77 folks with an initial testsuite.
+
+* Richard Henderson for his ongoing SPARC, alpha, ia32, and ia64 work, loop
+  opts, and generally fixing lots of old problems we've ignored for
+  years, flow rewrite and lots of further stuff, including reviewing
+  tons of patches.
+
+* Aldy Hernandez for working on the PowerPC port, SIMD support, and
+  various fixes.
+
+* Nobuyuki Hikichi of Software Research Associates, Tokyo, contributed
+  the support for the Sony NEWS machine.
+
+* Kazu Hirata for caring and feeding the Renesas H8/300 port and various fixes.
+
+* Katherine Holcomb for work on GNU Fortran.
+
+* Manfred Hollstein for his ongoing work to keep the m88k alive, lots
+  of testing and bug fixing, particularly of GCC configury code.
+
+* Steve Holmgren for MachTen patches.
+
+* Mat Hostetter for work on the TILE-Gx and TILEPro ports.
+
+* Jan Hubicka for his x86 port improvements.
+
+* Falk Hueffner for working on C and optimization bug reports.
+
+* Bernardo Innocenti for his m68k work, including merging of
+  ColdFire improvements and uClinux support.
+
+* Christian Iseli for various bug fixes.
+
+* Kamil Iskra for general m68k hacking.
+
+* Lee Iverson for random fixes and MIPS testing.
+
+* Balaji V. Iyer for Cilk+ development and merging.
+
+* Andreas Jaeger for testing and benchmarking of GCC and various bug fixes.
+
+* Martin Jambor for his work on inter-procedural optimizations, the
+  switch conversion pass, and scalar replacement of aggregates.
+
+* Jakub Jelinek for his SPARC work and sibling call optimizations as well
+  as lots of bug fixes and test cases, and for improving the Java build
+  system.
+
+* Janis Johnson for ia64 testing and fixes, her quality improvement
+  sidetracks, and web page maintenance.
+
+* Kean Johnston for SCO OpenServer support and various fixes.
+
+* Tim Josling for the sample language treelang based originally on Richard
+  Kenner's 'toy' language.
+
+* Nicolai Josuttis for additional libstdc++ documentation.
+
+* Klaus Kaempf for his ongoing work to make alpha-vms a viable target.
+
+* Steven G. Kargl for work on GNU Fortran.
+
+* David Kashtan of SRI adapted GCC to VMS.
+
+* Ryszard Kabatek for many, many libstdc++ bug fixes and optimizations of
+  strings, especially member functions, and for auto_ptr fixes.
+
+* Geoffrey Keating for his ongoing work to make the PPC work for GNU/Linux
+  and his automatic regression tester.
+
+* Brendan Kehoe for his ongoing work with G++ and for a lot of early work
+  in just about every part of libstdc++.
+
+* Oliver M. Kellogg of Deutsche Aerospace contributed the port to the
+  MIL-STD-1750A.
+
+* Richard Kenner of the New York University Ultracomputer Research
+  Laboratory wrote the machine descriptions for the AMD 29000, the DEC
+  Alpha, the IBM RT PC, and the IBM RS/6000 as well as the support for
+  instruction attributes.  He also made changes to better support RISC
+  processors including changes to common subexpression elimination,
+  strength reduction, function calling sequence handling, and condition
+  code support, in addition to generalizing the code for frame pointer
+  elimination and delay slot scheduling.  Richard Kenner was also the
+  head maintainer of GCC for several years.
+
+* Mumit Khan for various contributions to the Cygwin and Mingw32 ports and
+  maintaining binary releases for Microsoft Windows hosts, and for massive libstdc++
+  porting work to Cygwin/Mingw32.
+
+* Robin Kirkham for cpu32 support.
+
+* Mark Klein for PA improvements.
+
+* Thomas Koenig for various bug fixes.
+
+* Bruce Korb for the new and improved fixincludes code.
+
+* Benjamin Kosnik for his G++ work and for leading the libstdc++-v3 effort.
+
+* Maxim Kuvyrkov for contributions to the instruction scheduler, the Android
+  and m68k/Coldfire ports, and optimizations.
+
+* Charles LaBrec contributed the support for the Integrated Solutions
+  68020 system.
+
+* Asher Langton and Mike Kumbera for contributing Cray pointer support
+  to GNU Fortran, and for other GNU Fortran improvements.
+
+* Jeff Law for his direction via the steering committee, coordinating the
+  entire egcs project and GCC 2.95, rolling out snapshots and releases,
+  handling merges from GCC2, reviewing tons of patches that might have
+  fallen through the cracks else, and random but extensive hacking.
+
+* Walter Lee for work on the TILE-Gx and TILEPro ports.
+
+* Marc Lehmann for his direction via the steering committee and helping
+  with analysis and improvements of x86 performance.
+
+* Victor Leikehman for work on GNU Fortran.
+
+* Ted Lemon wrote parts of the RTL reader and printer.
+
+* Kriang Lerdsuwanakij for C++ improvements including template as template
+  parameter support, and many C++ fixes.
+
+* Warren Levy for tremendous work on libgcj (Java Runtime Library) and
+  random work on the Java front end.
+
+* Alain Lichnewsky ported GCC to the MIPS CPU.
+
+* Oskar Liljeblad for hacking on AWT and his many Java bug reports and
+  patches.
+
+* Robert Lipe for OpenServer support, new testsuites, testing, etc.
+
+* Chen Liqin for various S+core related fixes/improvement, and for
+  maintaining the S+core port.
+
+* Martin Liska for his work on identical code folding, the sanitizers,
+  HSA, general bug fixing and for running automated regression testing of GCC
+  and reporting numerous bugs.
+
+* Weiwen Liu for testing and various bug fixes.
+
+* Manuel López-Ibáñez for improving :option:`-Wconversion` and
+  many other diagnostics fixes and improvements.
+
+* Dave Love for his ongoing work with the Fortran front end and
+  runtime libraries.
+
+* Martin von Löwis for internal consistency checking infrastructure,
+  various C++ improvements including namespace support, and tons of
+  assistance with libstdc++/compiler merges.
+
+* H.J. Lu for his previous contributions to the steering committee, many x86
+  bug reports, prototype patches, and keeping the GNU/Linux ports working.
+
+* Greg McGary for random fixes and (someday) bounded pointers.
+
+* Andrew MacLeod for his ongoing work in building a real EH system,
+  various code generation improvements, work on the global optimizer, etc.
+
+* Vladimir Makarov for hacking some ugly i960 problems, PowerPC hacking
+  improvements to compile-time performance, overall knowledge and
+  direction in the area of instruction scheduling, design and
+  implementation of the automaton based instruction scheduler and
+  design and implementation of the integrated and local register allocators.
+
+* David Malcolm for his work on improving GCC diagnostics, JIT, self-tests
+  and unit testing.
+
+* Bob Manson for his behind the scenes work on dejagnu.
+
+* John Marino for contributing the DragonFly BSD port.
+
+* Philip Martin for lots of libstdc++ string and vector iterator fixes and
+  improvements, and string clean up and testsuites.
+
+* Michael Matz for his work on dominance tree discovery, the x86-64 port,
+  link-time optimization framework and general optimization improvements.
+
+* All of the Mauve project contributors for Java test code.
+
+* Bryce McKinlay for numerous GCJ and libgcj fixes and improvements.
+
+* Adam Megacz for his work on the Microsoft Windows port of GCJ.
+
+* Michael Meissner for LRS framework, ia32, m32r, v850, m88k, MIPS,
+  powerpc, haifa, ECOFF debug support, and other assorted hacking.
+
+* Jason Merrill for his direction via the steering committee and leading
+  the G++ effort.
+
+* Martin Michlmayr for testing GCC on several architectures using the
+  entire Debian archive.
+
+* David Miller for his direction via the steering committee, lots of
+  SPARC work, improvements in jump.cc and interfacing with the Linux kernel
+  developers.
+
+* Gary Miller ported GCC to Charles River Data Systems machines.
+
+* Alfred Minarik for libstdc++ string and ios bug fixes, and turning the
+  entire libstdc++ testsuite namespace-compatible.
+
+* Mark Mitchell for his direction via the steering committee, mountains of
+  C++ work, load/store hoisting out of loops, alias analysis improvements,
+  ISO C ``restrict`` support, and serving as release manager from 2000
+  to 2011.
+
+* Alan Modra for various GNU/Linux bits and testing.
+
+* Toon Moene for his direction via the steering committee, Fortran
+  maintenance, and his ongoing work to make us make Fortran run fast.
+
+* Jason Molenda for major help in the care and feeding of all the services
+  on the gcc.gnu.org (formerly egcs.cygnus.com) machine---mail, web
+  services, ftp services, etc etc.  Doing all this work on scrap paper and
+  the backs of envelopes would have been... difficult.
+
+* Catherine Moore for fixing various ugly problems we have sent her
+  way, including the haifa bug which was killing the Alpha & PowerPC
+  Linux kernels.
+
+* Mike Moreton for his various Java patches.
+
+* David Mosberger-Tang for various Alpha improvements, and for the initial
+  IA-64 port.
+
+* Stephen Moshier contributed the floating point emulator that assists in
+  cross-compilation and permits support for floating point numbers wider
+  than 64 bits and for ISO C99 support.
+
+* Bill Moyer for his behind the scenes work on various issues.
+
+* Philippe De Muyter for his work on the m68k port.
+
+* Joseph S. Myers for his work on the PDP-11 port, format checking and ISO
+  C99 support, and continuous emphasis on (and contributions to) documentation.
+
+* Nathan Myers for his work on libstdc++-v3: architecture and authorship
+  through the first three snapshots, including implementation of locale
+  infrastructure, string, shadow C headers, and the initial project
+  documentation (DESIGN, CHECKLIST, and so forth).  Later, more work on
+  MT-safe string and shadow headers.
+
+* Felix Natter for documentation on porting libstdc++.
+
+* Nathanael Nerode for cleaning up the configuration/build process.
+
+* NeXT, Inc. donated the front end that supports the Objective-C
+  language.
+
+* Hans-Peter Nilsson for the CRIS and MMIX ports, improvements to the search
+  engine setup, various documentation fixes and other small fixes.
+
+* Geoff Noer for his work on getting cygwin native builds working.
+
+* Vegard Nossum for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Diego Novillo for his work on Tree SSA, OpenMP, SPEC performance
+  tracking web pages, GIMPLE tuples, and assorted fixes.
+
+* David O'Brien for the FreeBSD/alpha, FreeBSD/AMD x86-64, FreeBSD/ARM,
+  FreeBSD/PowerPC, and FreeBSD/SPARC64 ports and related infrastructure
+  improvements.
+
+* Alexandre Oliva for various build infrastructure improvements, scripts and
+  amazing testing work, including keeping libtool issues sane and happy.
+
+* Stefan Olsson for work on mt_alloc.
+
+* Melissa O'Neill for various NeXT fixes.
+
+* Rainer Orth for random MIPS work, including improvements to GCC's o32
+  ABI support, improvements to dejagnu's MIPS support, Java configuration
+  clean-ups and porting work, and maintaining the IRIX, Solaris 2, and
+  Tru64 UNIX ports.
+
+* Steven Pemberton for his contribution of :samp:`enquire` which allowed GCC to
+  determine various properties of the floating point unit and generate
+  :samp:`float.h` in older versions of GCC.
+
+* Hartmut Penner for work on the s390 port.
+
+* Paul Petersen wrote the machine description for the Alliant FX/8.
+
+* Alexandre Petit-Bianco for implementing much of the Java compiler and
+  continued Java maintainership.
+
+* Matthias Pfaller for major improvements to the NS32k port.
+
+* Gerald Pfeifer for his direction via the steering committee, pointing
+  out lots of problems we need to solve, maintenance of the web pages, and
+  taking care of documentation maintenance in general.
+
+* Marek Polacek for his work on the C front end, the sanitizers and general
+  bug fixing.
+
+* Andrew Pinski for processing bug reports by the dozen.
+
+* Ovidiu Predescu for his work on the Objective-C front end and runtime
+  libraries.
+
+* Jerry Quinn for major performance improvements in C++ formatted I/O.
+
+* Ken Raeburn for various improvements to checker, MIPS ports and various
+  cleanups in the compiler.
+
+* Rolf W. Rasmussen for hacking on AWT.
+
+* David Reese of Sun Microsystems contributed to the Solaris on PowerPC
+  port.
+
+* John Regehr for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Volker Reichelt for running automated regression testing of GCC and reporting
+  numerous bugs and for keeping up with the problem reports.
+
+* Joern Rennecke for maintaining the sh port, loop, regmove & reload
+  hacking and developing and maintaining the Epiphany port.
+
+* Loren J. Rittle for improvements to libstdc++-v3 including the FreeBSD
+  port, threading fixes, thread-related configury changes, critical
+  threading documentation, and solutions to really tricky I/O problems,
+  as well as keeping GCC properly working on FreeBSD and continuous testing.
+
+* Craig Rodrigues for processing tons of bug reports.
+
+* Ola Rönnerup for work on mt_alloc.
+
+* Gavin Romig-Koch for lots of behind the scenes MIPS work.
+
+* David Ronis inspired and encouraged Craig to rewrite the G77
+  documentation in texinfo format by contributing a first pass at a
+  translation of the old :samp:`g77-0.5.16/f/DOC` file.
+
+* Ken Rose for fixes to GCC's delay slot filling code.
+
+* Ira Rosen for her contributions to the auto-vectorizer.
+
+* Paul Rubin wrote most of the preprocessor.
+
+* Pétur Runólfsson for major performance improvements in C++ formatted I/O and
+  large file support in C++ filebuf.
+
+* Chip Salzenberg for libstdc++ patches and improvements to locales, traits,
+  Makefiles, libio, libtool hackery, and 'long long' support.
+
+* Juha Sarlin for improvements to the H8 code generator.
+
+* Greg Satz assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Roger Sayle for improvements to constant folding and GCC's RTL optimizers
+  as well as for fixing numerous bugs.
+
+* Bradley Schatz for his work on the GCJ FAQ.
+
+* Peter Schauer wrote the code to allow debugging to work on the Alpha.
+
+* William Schelter did most of the work on the Intel 80386 support.
+
+* Tobias Schlüter for work on GNU Fortran.
+
+* Bernd Schmidt for various code generation improvements and major
+  work in the reload pass, serving as release manager for
+  GCC 2.95.3, and work on the Blackfin and C6X ports.
+
+* Peter Schmid for constant testing of libstdc++---especially application
+  testing, going above and beyond what was requested for the release
+  criteria---and libstdc++ header file tweaks.
+
+* Jason Schroeder for jcf-dump patches.
+
+* Andreas Schwab for his work on the m68k port.
+
+* Lars Segerlund for work on GNU Fortran.
+
+* Dodji Seketeli for numerous C++ bug fixes and debug info improvements.
+
+* Tim Shen for major work on ``<regex>``.
+
+* Joel Sherrill for his direction via the steering committee, RTEMS
+  contributions and RTEMS testing.
+
+* Nathan Sidwell for many C++ fixes/improvements.
+
+* Jeffrey Siegal for helping RMS with the original design of GCC, some
+  code which handles the parse tree and RTL data structures, constant
+  folding and help with the original VAX & m68k ports.
+
+* Kenny Simpson for prompting libstdc++ fixes due to defect reports from
+  the LWG (thereby keeping GCC in line with updates from the ISO).
+
+* Franz Sirl for his ongoing work with making the PPC port stable
+  for GNU/Linux.
+
+* Andrey Slepuhin for assorted AIX hacking.
+
+* Trevor Smigiel for contributing the SPU port.
+
+* Christopher Smith did the port for Convex machines.
+
+* Danny Smith for his major efforts on the Mingw (and Cygwin) ports.
+  Retired from GCC maintainership August 2010, having mentored two
+  new maintainers into the role.
+
+* Randy Smith finished the Sun FPA support.
+
+* Ed Smith-Rowland for his continuous work on libstdc++-v3, special functions,
+  ``<random>``, and various improvements to C++11 features.
+
+* Scott Snyder for queue, iterator, istream, and string fixes and libstdc++
+  testsuite entries.  Also for providing the patch to G77 to add
+  rudimentary support for ``INTEGER*1``, ``INTEGER*2``, and
+  ``LOGICAL*1``.
+
+* Zdenek Sojka for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Arseny Solokha for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Jayant Sonar for contributing the CR16 port.
+
+* Brad Spencer for contributions to the GLIBCPP_FORCE_NEW technique.
+
+* Richard Stallman, for writing the original GCC and launching the GNU project.
+
+* Jan Stein of the Chalmers Computer Society provided support for
+  Genix, as well as part of the 32000 machine description.
+
+* Gerhard Steinmetz for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Nigel Stephens for various mips16 related fixes/improvements.
+
+* Jonathan Stone wrote the machine description for the Pyramid computer.
+
+* Graham Stott for various infrastructure improvements.
+
+* John Stracke for his Java HTTP protocol fixes.
+
+* Mike Stump for his Elxsi port, G++ contributions over the years and more
+  recently his vxworks contributions
+
+* Jeff Sturm for Java porting help, bug fixes, and encouragement.
+
+* Zhendong Su for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Chengnian Sun for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Shigeya Suzuki for this fixes for the bsdi platforms.
+
+* Ian Lance Taylor for the Go frontend, the initial mips16 and mips64
+  support, general configury hacking, fixincludes, etc.
+
+* Holger Teutsch provided the support for the Clipper CPU.
+
+* Gary Thomas for his ongoing work to make the PPC work for GNU/Linux.
+
+* Paul Thomas for contributions to GNU Fortran.
+
+* Philipp Thomas for random bug fixes throughout the compiler
+
+* Jason Thorpe for thread support in libstdc++ on NetBSD.
+
+* Kresten Krab Thorup wrote the run time support for the Objective-C
+  language and the fantastic Java bytecode interpreter.
+
+* Michael Tiemann for random bug fixes, the first instruction scheduler,
+  initial C++ support, function integration, NS32k, SPARC and M88k
+  machine description work, delay slot scheduling.
+
+* Andreas Tobler for his work porting libgcj to Darwin.
+
+* Teemu Torma for thread safe exception handling support.
+
+* Leonard Tower wrote parts of the parser, RTL generator, and RTL
+  definitions, and of the VAX machine description.
+
+* Daniel Towner and Hariharan Sandanagobalane contributed and
+  maintain the picoChip port.
+
+* Tom Tromey for internationalization support and for his many Java
+  contributions and libgcj maintainership.
+
+* Lassi Tuura for improvements to config.guess to determine HP processor
+  types.
+
+* Petter Urkedal for libstdc++ CXXFLAGS, math, and algorithms fixes.
+
+* Andy Vaught for the design and initial implementation of the GNU Fortran
+  front end.
+
+* Brent Verner for work with the libstdc++ cshadow files and their
+  associated configure steps.
+
+* Todd Vierling for contributions for NetBSD ports.
+
+* Andrew Waterman for contributing the RISC-V port, as well as maintaining it.
+
+* Jonathan Wakely for contributing libstdc++ Doxygen notes and XHTML
+  guidance and maintaining libstdc++.
+
+* Dean Wakerley for converting the install documentation from HTML to texinfo
+  in time for GCC 3.0.
+
+* Krister Walfridsson for random bug fixes.
+
+* Feng Wang for contributions to GNU Fortran.
+
+* Stephen M. Webb for time and effort on making libstdc++ shadow files
+  work with the tricky Solaris 8+ headers, and for pushing the build-time
+  header tree. Also, for starting and driving the ``<regex>`` effort.
+
+* John Wehle for various improvements for the x86 code generator,
+  related infrastructure improvements to help x86 code generation,
+  value range propagation and other work, WE32k port.
+
+* Ulrich Weigand for work on the s390 port.
+
+* Janus Weil for contributions to GNU Fortran.
+
+* Zack Weinberg for major work on cpplib and various other bug fixes.
+
+* Matt Welsh for help with Linux Threads support in GCJ.
+
+* Urban Widmark for help fixing java.io.
+
+* Mark Wielaard for new Java library code and his work integrating with
+  Classpath.
+
+* Dale Wiles helped port GCC to the Tahoe.
+
+* Bob Wilson from Tensilica, Inc. for the Xtensa port.
+
+* Jim Wilson for his direction via the steering committee, tackling hard
+  problems in various places that nobody else wanted to work on, strength
+  reduction and other loop optimizations.
+
+* Paul Woegerer and Tal Agmon for the CRX port.
+
+* Carlo Wood for various fixes.
+
+* Tom Wood for work on the m88k port.
+
+* Chung-Ju Wu for his work on the Andes NDS32 port.
+
+* Canqun Yang for work on GNU Fortran.
+
+* Masanobu Yuhara of Fujitsu Laboratories implemented the machine
+  description for the Tron architecture (specifically, the Gmicro).
+
+* Kevin Zachmann helped port GCC to the Tahoe.
+
+* Ayal Zaks for Swing Modulo Scheduling (SMS).
+
+* Qirun Zhang for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Xiaoqiang Zhang for work on GNU Fortran.
+
+* Gilles Zunino for help porting Java to Irix.
+
+The following people are recognized for their contributions to GNAT,
+the Ada front end of GCC:
+
+* Bernard Banner
+
+* Romain Berrendonner
+
+* Geert Bosch
+
+* Emmanuel Briot
+
+* Joel Brobecker
+
+* Ben Brosgol
+
+* Vincent Celier
+
+* Arnaud Charlet
+
+* Chien Chieng
+
+* Cyrille Comar
+
+* Cyrille Crozes
+
+* Robert Dewar
+
+* Gary Dismukes
+
+* Robert Duff
+
+* Ed Falis
+
+* Ramon Fernandez
+
+* Sam Figueroa
+
+* Vasiliy Fofanov
+
+* Michael Friess
+
+* Franco Gasperoni
+
+* Ted Giering
+
+* Matthew Gingell
+
+* Laurent Guerby
+
+* Jerome Guitton
+
+* Olivier Hainque
+
+* Jerome Hugues
+
+* Hristian Kirtchev
+
+* Jerome Lambourg
+
+* Bruno Leclerc
+
+* Albert Lee
+
+* Sean McNeil
+
+* Javier Miranda
+
+* Laurent Nana
+
+* Pascal Obry
+
+* Dong-Ik Oh
+
+* Laurent Pautet
+
+* Brett Porter
+
+* Thomas Quinot
+
+* Nicolas Roche
+
+* Pat Rogers
+
+* Jose Ruiz
+
+* Douglas Rupp
+
+* Sergey Rybin
+
+* Gail Schenker
+
+* Ed Schonberg
+
+* Nicolas Setton
+
+* Samuel Tardieu
+
+The following people are recognized for their contributions of new
+features, bug reports, testing and integration of classpath/libgcj for
+GCC version 4.1:
+
+* Lillian Angel for ``JTree`` implementation and lots Free Swing
+  additions and bug fixes.
+
+* Wolfgang Baer for ``GapContent`` bug fixes.
+
+* Anthony Balkissoon for ``JList``, Free Swing 1.5 updates and mouse event
+  fixes, lots of Free Swing work including ``JTable`` editing.
+
+* Stuart Ballard for RMI constant fixes.
+
+* Goffredo Baroncelli for ``HTTPURLConnection`` fixes.
+
+* Gary Benson for ``MessageFormat`` fixes.
+
+* Daniel Bonniot for ``Serialization`` fixes.
+
+* Chris Burdess for lots of gnu.xml and http protocol fixes, ``StAX``
+  and ``DOM xml:id`` support.
+
+* Ka-Hing Cheung for ``TreePath`` and ``TreeSelection`` fixes.
+
+* Archie Cobbs for build fixes, VM interface updates,
+  ``URLClassLoader`` updates.
+
+* Kelley Cook for build fixes.
+
+* Martin Cordova for Suggestions for better ``SocketTimeoutException``.
+
+* David Daney for ``BitSet`` bug fixes, ``HttpURLConnection``
+  rewrite and improvements.
+
+* Thomas Fitzsimmons for lots of upgrades to the gtk+ AWT and Cairo 2D
+  support. Lots of imageio framework additions, lots of AWT and Free
+  Swing bug fixes.
+
+* Jeroen Frijters for ``ClassLoader`` and nio cleanups, serialization fixes,
+  better ``Proxy`` support, bug fixes and IKVM integration.
+
+* Santiago Gala for ``AccessControlContext`` fixes.
+
+* Nicolas Geoffray for ``VMClassLoader`` and ``AccessController``
+  improvements.
+
+* David Gilbert for ``basic`` and ``metal`` icon and plaf support
+  and lots of documenting, Lots of Free Swing and metal theme
+  additions. ``MetalIconFactory`` implementation.
+
+* Anthony Green for ``MIDI`` framework, ``ALSA`` and ``DSSI``
+  providers.
+
+* Andrew Haley for ``Serialization`` and ``URLClassLoader`` fixes,
+  gcj build speedups.
+
+* Kim Ho for ``JFileChooser`` implementation.
+
+* Andrew John Hughes for ``Locale`` and net fixes, URI RFC2986
+  updates, ``Serialization`` fixes, ``Properties`` XML support and
+  generic branch work, VMIntegration guide update.
+
+* Bastiaan Huisman for ``TimeZone`` bug fixing.
+
+* Andreas Jaeger for mprec updates.
+
+* Paul Jenner for better :option:`-Werror` support.
+
+* Ito Kazumitsu for ``NetworkInterface`` implementation and updates.
+
+* Roman Kennke for ``BoxLayout``, ``GrayFilter`` and
+  ``SplitPane``, plus bug fixes all over. Lots of Free Swing work
+  including styled text.
+
+* Simon Kitching for ``String`` cleanups and optimization suggestions.
+
+* Michael Koch for configuration fixes, ``Locale`` updates, bug and
+  build fixes.
+
+* Guilhem Lavaux for configuration, thread and channel fixes and Kaffe
+  integration. JCL native ``Pointer`` updates. Logger bug fixes.
+
+* David Lichteblau for JCL support library global/local reference
+  cleanups.
+
+* Aaron Luchko for JDWP updates and documentation fixes.
+
+* Ziga Mahkovec for ``Graphics2D`` upgraded to Cairo 0.5 and new regex
+  features.
+
+* Sven de Marothy for BMP imageio support, CSS and ``TextLayout``
+  fixes. ``GtkImage`` rewrite, 2D, awt, free swing and date/time fixes and
+  implementing the Qt4 peers.
+
+* Casey Marshall for crypto algorithm fixes, ``FileChannel`` lock,
+  ``SystemLogger`` and ``FileHandler`` rotate implementations, NIO
+  ``FileChannel.map`` support, security and policy updates.
+
+* Bryce McKinlay for RMI work.
+
+* Audrius Meskauskas for lots of Free Corba, RMI and HTML work plus
+  testing and documenting.
+
+* Kalle Olavi Niemitalo for build fixes.
+
+* Rainer Orth for build fixes.
+
+* Andrew Overholt for ``File`` locking fixes.
+
+* Ingo Proetel for ``Image``, ``Logger`` and ``URLClassLoader``
+  updates.
+
+* Olga Rodimina for ``MenuSelectionManager`` implementation.
+
+* Jan Roehrich for ``BasicTreeUI`` and ``JTree`` fixes.
+
+* Julian Scheid for documentation updates and gjdoc support.
+
+* Christian Schlichtherle for zip fixes and cleanups.
+
+* Robert Schuster for documentation updates and beans fixes,
+  ``TreeNode`` enumerations and ``ActionCommand`` and various
+  fixes, XML and URL, AWT and Free Swing bug fixes.
+
+* Keith Seitz for lots of JDWP work.
+
+* Christian Thalinger for 64-bit cleanups, Configuration and VM
+  interface fixes and ``CACAO`` integration, ``fdlibm`` updates.
+
+* Gael Thomas for ``VMClassLoader`` boot packages support suggestions.
+
+* Andreas Tobler for Darwin and Solaris testing and fixing, ``Qt4``
+  support for Darwin/OS X, ``Graphics2D`` support, ``gtk+``
+  updates.
+
+* Dalibor Topic for better ``DEBUG`` support, build cleanups and
+  Kaffe integration. ``Qt4`` build infrastructure, ``SHA1PRNG``
+  and ``GdkPixbugDecoder`` updates.
+
+* Tom Tromey for Eclipse integration, generics work, lots of bug fixes
+  and gcj integration including coordinating The Big Merge.
+
+* Mark Wielaard for bug fixes, packaging and release management,
+  ``Clipboard`` implementation, system call interrupts and network
+  timeouts and ``GdkPixpufDecoder`` fixes.
+
+In addition to the above, all of which also contributed time and energy in
+testing GCC, we would like to thank the following for their contributions
+to testing:
+
+* Michael Abd-El-Malek
+
+* Thomas Arend
+
+* Bonzo Armstrong
+
+* Steven Ashe
+
+* Chris Baldwin
+
+* David Billinghurst
+
+* Jim Blandy
+
+* Stephane Bortzmeyer
+
+* Horst von Brand
+
+* Frank Braun
+
+* Rodney Brown
+
+* Sidney Cadot
+
+* Bradford Castalia
+
+* Robert Clark
+
+* Jonathan Corbet
+
+* Ralph Doncaster
+
+* Richard Emberson
+
+* Levente Farkas
+
+* Graham Fawcett
+
+* Mark Fernyhough
+
+* Robert A. French
+
+* Jörgen Freyh
+
+* Mark K. Gardner
+
+* Charles-Antoine Gauthier
+
+* Yung Shing Gene
+
+* David Gilbert
+
+* Simon Gornall
+
+* Fred Gray
+
+* John Griffin
+
+* Patrik Hagglund
+
+* Phil Hargett
+
+* Amancio Hasty
+
+* Takafumi Hayashi
+
+* Bryan W. Headley
+
+* Kevin B. Hendricks
+
+* Joep Jansen
+
+* Christian Joensson
+
+* Michel Kern
+
+* David Kidd
+
+* Tobias Kuipers
+
+* Anand Krishnaswamy
+
+* A.O.V. Le Blanc
+
+* llewelly
+
+* Damon Love
+
+* Brad Lucier
+
+* Matthias Klose
+
+* Martin Knoblauch
+
+* Rick Lutowski
+
+* Jesse Macnish
+
+* Stefan Morrell
+
+* Anon A. Mous
+
+* Matthias Mueller
+
+* Pekka Nikander
+
+* Rick Niles
+
+* Jon Olson
+
+* Magnus Persson
+
+* Chris Pollard
+
+* Richard Polton
+
+* Derk Reefman
+
+* David Rees
+
+* Paul Reilly
+
+* Tom Reilly
+
+* Torsten Rueger
+
+* Danny Sadinoff
+
+* Marc Schifer
+
+* Erik Schnetter
+
+* Wayne K. Schroll
+
+* David Schuler
+
+* Vin Shelton
+
+* Tim Souder
+
+* Adam Sulmicki
+
+* Bill Thorson
+
+* George Talbot
+
+* Pedro A. M. Vazquez
+
+* Gregory Warnes
+
+* Ian Watson
+
+* David E. Young
+
+* And many others
+
+And finally we'd like to thank everyone who uses the compiler, provides
+feedback and generally reminds us why we're doing this work in the first
+place.
\ No newline at end of file
diff --git a/doc/contribute.rst b/doc/contribute.rst
new file mode 100644
index 00000000000..643562efc63
--- /dev/null
+++ b/doc/contribute.rst
@@ -0,0 +1,21 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _contributing:
+
+Contributing to GCC Development
+-------------------------------
+
+If you would like to help pretest GCC releases to assure they work well,
+current development sources are available via Git (see
+https://gcc.gnu.org/git.html).  Source and binary snapshots are
+also available for FTP; see https://gcc.gnu.org/snapshots.html.
+
+If you would like to work on improvements to GCC, please read the
+advice at these URLs: https://gcc.gnu.org/contribute.html, https://gcc.gnu.org/contributewhy.html.
+
+for information on how to make useful contributions and avoid
+duplication of effort.  Suggested projects are listed at
+https://gcc.gnu.org/projects/.
\ No newline at end of file
diff --git a/doc/cppdiropts.rst b/doc/cppdiropts.rst
new file mode 100644
index 00000000000..91568fe5612
--- /dev/null
+++ b/doc/cppdiropts.rst
@@ -0,0 +1,217 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -I {dir}, -iquote {dir}, -isystem {dir}, -idirafter {dir}
+
+  Add the directory :samp:`{dir}` to the list of directories to be searched
+  for header files during preprocessing.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+  If :samp:`{dir}` begins with :samp:`=` or ``$SYSROOT``, then the :samp:`=`
+  or ``$SYSROOT`` is replaced by the sysroot prefix; see
+  :option:`--sysroot` and :option:`-isysroot`.
+
+  Directories specified with :option:`-iquote` apply only to the quote
+  form of the directive, ``#include "file"``.
+  Directories specified with :option:`-I`, :option:`-isystem`,
+  or :option:`-idirafter` apply to lookup for both the
+  ``#include "file"`` and
+  ``#include <file>`` directives.
+
+  You can specify any number or combination of these options on the
+  command line to search for header files in several directories.
+  The lookup order is as follows:
+
+  * For the quote form of the include directive, the directory of the current
+    file is searched first.
+
+  * For the quote form of the include directive, the directories specified
+    by :option:`-iquote` options are searched in left-to-right order,
+    as they appear on the command line.
+
+  * Directories specified with :option:`-I` options are scanned in
+    left-to-right order.
+
+  * Directories specified with :option:`-isystem` options are scanned in
+    left-to-right order.
+
+  * Standard system directories are scanned.
+
+  * Directories specified with :option:`-idirafter` options are scanned in
+    left-to-right order.
+
+  You can use :option:`-I` to override a system header
+  file, substituting your own version, since these directories are
+  searched before the standard system header file directories.
+  However, you should
+  not use this option to add directories that contain vendor-supplied
+  system header files; use :option:`-isystem` for that.
+
+  The :option:`-isystem` and :option:`-idirafter` options also mark the directory
+  as a system directory, so that it gets the same special treatment that
+  is applied to the standard system directories.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+  If a standard system include directory, or a directory specified with
+  :option:`-isystem`, is also specified with :option:`-I`, the :option:`-I`
+  option is ignored.  The directory is still searched but as a
+  system directory at its normal position in the system include chain.
+  This is to ensure that GCC's procedure to fix buggy system headers and
+  the ordering for the ``#include_next`` directive are not inadvertently
+  changed.
+  If you really need to change the search order for system directories,
+  use the :option:`-nostdinc` and/or :option:`-isystem` options.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+.. option:: -I-
+
+  Split the include path.
+  This option has been deprecated.  Please use :option:`-iquote` instead for
+  :option:`-I` directories before the :option:`-I-` and remove the :option:`-I-`
+  option.
+
+  Any directories specified with :option:`-I`
+  options before :option:`-I-` are searched only for headers requested with
+  ``#include "file"`` ; they are not searched for
+  ``#include <file>``.  If additional directories are
+  specified with :option:`-I` options after the :option:`-I-`, those
+  directories are searched for all :samp:`#include` directives.
+
+  In addition, :option:`-I-` inhibits the use of the directory of the current
+  file directory as the first search directory for ``#include
+  "file"``.  There is no way to override this effect of :option:`-I-`.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+
+.. option:: -iprefix {prefix}
+
+  Specify :samp:`{prefix}` as the prefix for subsequent :option:`-iwithprefix`
+  options.  If the prefix represents a directory, you should include the
+  final :samp:`/`.
+
+.. option:: -iwithprefix {dir}, -iwithprefixbefore {dir}
+
+  Append :samp:`{dir}` to the prefix specified previously with
+  :option:`-iprefix`, and add the resulting directory to the include search
+  path.  :option:`-iwithprefixbefore` puts it in the same place :option:`-I`
+  would; :option:`-iwithprefix` puts it where :option:`-idirafter` would.
+
+.. option:: -isysroot {dir}
+
+  This option is like the :option:`--sysroot` option, but applies only to
+  header files (except for Darwin targets, where it applies to both header
+  files and libraries).  See the :option:`--sysroot` option for more
+  information.
+
+.. option:: -imultilib {dir}
+
+  Use :samp:`{dir}` as a subdirectory of the directory containing
+  target-specific C++ headers.
+
+.. option:: -nostdinc
+
+  Do not search the standard system directories for header files.
+  Only the directories explicitly specified with :option:`-I`,
+  :option:`-iquote`, :option:`-isystem`, and/or :option:`-idirafter`
+  options (and the directory of the current file, if appropriate)
+  are searched.
+
+.. option:: -nostdinc++
+
+  Do not search for header files in the C++-specific standard directories,
+  but do still search the other standard directories.  (This option is
+  used when building the C++ library.)
+
+.. option:: -Wcomment, -Wcomments
+
+  Warn whenever a comment-start sequence :samp:`/*` appears in a :samp:`/*`
+  comment, or whenever a backslash-newline appears in a :samp:`//` comment.
+  This warning is enabled by :option:`-Wall`.
+
+.. option:: -Wtrigraphs
+
+.. _wtrigraphs:
+
+  Warn if any trigraphs are encountered that might change the meaning of
+  the program.  Trigraphs within comments are not warned about,
+  except those that would form escaped newlines.
+
+  This option is implied by :option:`-Wall`.  If :option:`-Wall` is not
+  given, this option is still enabled unless trigraphs are enabled.  To
+  get trigraph conversion without warnings, but get the other
+  :option:`-Wall` warnings, use :samp:`-trigraphs -Wall -Wno-trigraphs`.
+
+.. option:: -Wundef
+
+  Warn if an undefined identifier is evaluated in an ``#if`` directive.
+  Such identifiers are replaced with zero.
+
+.. option:: -Wno-undef
+
+  Default setting; overrides :option:`-Wundef`.
+
+.. option:: -Wexpansion-to-defined
+
+  Warn whenever :samp:`defined` is encountered in the expansion of a macro
+  (including the case where the macro is expanded by an :samp:`#if` directive).
+  Such usage is not portable.
+  This warning is also enabled by :option:`-Wpedantic` and :option:`-Wextra`.
+
+.. option:: -Wunused-macros
+
+  Warn about macros defined in the main file that are unused.  A macro
+  is :dfn:`used` if it is expanded or tested for existence at least once.
+  The preprocessor also warns if the macro has not been used at the
+  time it is redefined or undefined.
+
+  Built-in macros, macros defined on the command line, and macros
+  defined in include files are not warned about.
+
+  .. note::
+
+    If a macro is actually used, but only used in skipped
+    conditional blocks, then the preprocessor reports it as unused.  To avoid the
+    warning in such a case, you might improve the scope of the macro's
+    definition by, for example, moving it into the first skipped block.
+    Alternatively, you could provide a dummy use with something like:
+
+  .. code-block:: c++
+
+    #if defined the_macro_causing_the_warning
+    #endif
+
+.. option:: -Wno-endif-labels
+
+  Do not warn whenever an ``#else`` or an ``#endif`` are followed by text.
+  This sometimes happens in older programs with code of the form
+
+  .. code-block:: c++
+
+    #if FOO
+    ...
+    #else FOO
+    ...
+    #endif FOO
+
+  The second and third ``FOO`` should be in comments.
+  This warning is on by default.
+
+.. option:: -Wendif-labels
+
+  Default setting; overrides :option:`-Wno-endif-labels`.
\ No newline at end of file
diff --git a/doc/cppenv.rst b/doc/cppenv.rst
new file mode 100644
index 00000000000..f27338cfa2f
--- /dev/null
+++ b/doc/cppenv.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. envvar:: CPATH, C_INCLUDE_PATH, CPLUS_INCLUDE_PATH, OBJC_INCLUDE_PATH
+
+  .. Commented out until ObjC++ is part of GCC:
+     @itemx OBJCPLUS_INCLUDE_PATH
+
+  Each variable's value is a list of directories separated by a special
+  character, much like :envvar:`PATH`, in which to look for header files.
+  The special character, ``PATH_SEPARATOR``, is target-dependent and
+  determined at GCC build time.  For Microsoft Windows-based targets it is a
+  semicolon, and for almost all other targets it is a colon.
+
+  :envvar:`CPATH` specifies a list of directories to be searched as if
+  specified with :option:`-I`, but after any paths given with :option:`-I`
+  options on the command line.  This environment variable is used
+  regardless of which language is being preprocessed.
+
+  The remaining environment variables apply only when preprocessing the
+  particular language indicated.  Each specifies a list of directories
+  to be searched as if specified with :option:`-isystem`, but after any
+  paths given with :option:`-isystem` options on the command line.
+
+  In all these variables, an empty element instructs the compiler to
+  search its current working directory.  Empty elements can appear at the
+  beginning or end of a path.  For instance, if the value of
+  :envvar:`CPATH` is ``:/special/include``, that has the same
+  effect as :samp:`-I. -I/special/include`.
+
+  .. only:: cpp
+
+    See also :ref:`search-path`.
+
+.. index:: dependencies for make as output
+
+.. envvar:: DEPENDENCIES_OUTPUT
+
+  If this variable is set, its value specifies how to output
+  dependencies for Make based on the non-system header files processed
+  by the compiler.  System header files are ignored in the dependency
+  output.
+
+  The value of :envvar:`DEPENDENCIES_OUTPUT` can be just a file name, in
+  which case the Make rules are written to that file, guessing the target
+  name from the source file name.  Or the value can have the form
+  :samp:`{file}{target}`, in which case the rules are written to
+  file :samp:`{file}` using :samp:`{target}` as the target name.
+
+  In other words, this environment variable is equivalent to combining
+  the options :option:`-MM` and :option:`-MF`
+
+  .. only:: cpp
+
+    (see :ref:`invocation`),
+
+  .. only:: not cpp
+
+    (see :ref:`preprocessor-options`),
+
+  with an optional :option:`-MT` switch too.
+
+.. index:: dependencies for make as output
+
+.. envvar:: SUNPRO_DEPENDENCIES
+
+  This variable is the same as :envvar:`DEPENDENCIES_OUTPUT` (see above),
+  except that system header files are not ignored, so it implies
+  :option:`-M` rather than :option:`-MM`.  However, the dependence on the
+  main input file is omitted.
+
+  .. only:: cpp
+
+    See :ref:`invocation`.
+
+  .. only:: not cpp
+
+    See :ref:`preprocessor-options`.
+
+.. envvar:: SOURCE_DATE_EPOCH
+
+  If this variable is set, its value specifies a UNIX timestamp to be
+  used in replacement of the current date and time in the ``__DATE__``
+  and ``__TIME__`` macros, so that the embedded timestamps become
+  reproducible.
+
+  The value of :envvar:`SOURCE_DATE_EPOCH` must be a UNIX timestamp,
+  defined as the number of seconds (excluding leap seconds) since
+  01 Jan 1970 00:00:00 represented in ASCII; identical to the output of
+  ``date +%s`` on GNU/Linux and other systems that support the
+  ``%s`` extension in the ``date`` command.
+
+  The value should be a known timestamp such as the last modification
+  time of the source or package and it should be set by the build
+  process.
\ No newline at end of file
diff --git a/doc/cppopts.rst b/doc/cppopts.rst
new file mode 100644
index 00000000000..60d663e35d8
--- /dev/null
+++ b/doc/cppopts.rst
@@ -0,0 +1,556 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -D {name}
+
+  Predefine :samp:`{name}` as a macro, with definition ``1``.
+
+.. option:: -D name=definition
+
+  The contents of :samp:`{definition}` are tokenized and processed as if
+  they appeared during translation phase three in a :samp:`#define`
+  directive.  In particular, the definition is truncated by
+  embedded newline characters.
+
+  If you are invoking the preprocessor from a shell or shell-like
+  program you may need to use the shell's quoting syntax to protect
+  characters such as spaces that have a meaning in the shell syntax.
+
+  If you wish to define a function-like macro on the command line, write
+  its argument list with surrounding parentheses before the equals sign
+  (if any).  Parentheses are meaningful to most shells, so you should
+  quote the option.  With :command:`sh` and :command:`csh`,
+  :option:`-D'name(args...)=definition'` works.
+
+  :option:`-D` and :option:`-U` options are processed in the order they
+  are given on the command line.  All :option:`-imacros file` and
+  :option:`-include file` options are processed after all
+  :option:`-D` and :option:`-U` options.
+
+.. option:: -U {name}
+
+  Cancel any previous definition of :samp:`{name}`, either built in or
+  provided with a :option:`-D` option.
+
+.. option:: -include {file}
+
+  Process :samp:`{file}` as if ``#include "file"`` appeared as the first
+  line of the primary source file.  However, the first directory searched
+  for :samp:`{file}` is the preprocessor's working directory *instead of*
+  the directory containing the main source file.  If not found there, it
+  is searched for in the remainder of the ``#include "..."`` search
+  chain as normal.
+
+  If multiple :option:`-include` options are given, the files are included
+  in the order they appear on the command line.
+
+.. option:: -imacros {file}
+
+  Exactly like :option:`-include`, except that any output produced by
+  scanning :samp:`{file}` is thrown away.  Macros it defines remain defined.
+  This allows you to acquire all the macros from a header without also
+  processing its declarations.
+
+  All files specified by :option:`-imacros` are processed before all files
+  specified by :option:`-include`.
+
+.. option:: -undef
+
+  Do not predefine any system-specific or GCC-specific macros.  The
+  standard predefined macros remain defined.
+
+  .. only:: cpp
+
+    See :ref:`standard-predefined-macros`.
+
+.. option:: -pthread
+
+  Define additional macros required for using the POSIX threads library.
+  You should use this option consistently for both compilation and linking.
+  This option is supported on GNU/Linux targets, most other Unix derivatives,
+  and also on x86 Cygwin and MinGW targets.
+
+.. index:: make, dependencies, make
+
+.. option:: -M
+
+  Instead of outputting the result of preprocessing, output a rule
+  suitable for :command:`make` describing the dependencies of the main
+  source file.  The preprocessor outputs one :command:`make` rule containing
+  the object file name for that source file, a colon, and the names of all
+  the included files, including those coming from :option:`-include` or
+  :option:`-imacros` command-line options.
+
+  Unless specified explicitly (with :option:`-MT` or :option:`-MQ`), the
+  object file name consists of the name of the source file with any
+  suffix replaced with object file suffix and with any leading directory
+  parts removed.  If there are many included files then the rule is
+  split into several lines using :samp:`\\` -newline.  The rule has no
+  commands.
+
+  This option does not suppress the preprocessor's debug output, such as
+  :option:`-dM`.  To avoid mixing such debug output with the dependency
+  rules you should explicitly specify the dependency output file with
+  :option:`-MF`, or use an environment variable like
+  :envvar:`DEPENDENCIES_OUTPUT` (see :ref:`environment-variables`).  Debug output
+  is still sent to the regular output stream as normal.
+
+  Passing :option:`-M` to the driver implies :option:`-E`, and suppresses
+  warnings with an implicit :option:`-w`.
+
+.. option:: -MM
+
+  Like :option:`-M` but do not mention header files that are found in
+  system header directories, nor header files that are included,
+  directly or indirectly, from such a header.
+
+  This implies that the choice of angle brackets or double quotes in an
+  :samp:`#include` directive does not in itself determine whether that
+  header appears in :option:`-MM` dependency output.
+
+.. option:: -MF {file}
+
+  When used with :option:`-M` or :option:`-MM`, specifies a
+  file to write the dependencies to.  If no :option:`-MF` switch is given
+  the preprocessor sends the rules to the same place it would send
+  preprocessed output.
+
+  When used with the driver options :option:`-MD` or :option:`-MMD`,
+  :option:`-MF` overrides the default dependency output file.
+
+  If :samp:`{file}` is :samp:`-`, then the dependencies are written to :samp:`stdout`.
+
+.. option:: -MG
+
+  In conjunction with an option such as :option:`-M` requesting
+  dependency generation, :option:`-MG` assumes missing header files are
+  generated files and adds them to the dependency list without raising
+  an error.  The dependency filename is taken directly from the
+  ``#include`` directive without prepending any path.  :option:`-MG`
+  also suppresses preprocessed output, as a missing header file renders
+  this useless.
+
+  This feature is used in automatic updating of makefiles.
+
+.. option:: -Mno-modules
+
+  Disable dependency generation for compiled module interfaces.
+
+.. option:: -MP
+
+  This option instructs CPP to add a phony target for each dependency
+  other than the main file, causing each to depend on nothing.  These
+  dummy rules work around errors :command:`make` gives if you remove header
+  files without updating the :samp:`Makefile` to match.
+
+  This is typical output:
+
+  .. code-block:: c++
+
+    test.o: test.c test.h
+
+    test.h:
+
+.. option:: -MT {target}
+
+  Change the target of the rule emitted by dependency generation.  By
+  default CPP takes the name of the main input file, deletes any
+  directory components and any file suffix such as :samp:`.c`, and
+  appends the platform's usual object suffix.  The result is the target.
+
+  An :option:`-MT` option sets the target to be exactly the string you
+  specify.  If you want multiple targets, you can specify them as a single
+  argument to :option:`-MT`, or use multiple :option:`-MT` options.
+
+  For example, ``-MT '$(objpfx)foo.o'`` might give
+
+  .. code-block:: c++
+
+    $(objpfx)foo.o: foo.c
+
+.. option:: -MQ {target}
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  Make. ``-MQ '$(objpfx)foo.o'`` gives
+
+  .. code-block:: c++
+
+    $$(objpfx)foo.o: foo.c
+
+  The default target is automatically quoted, as if it were given with
+  :option:`-MQ`.
+
+.. option:: -MD
+
+  :option:`-MD` is equivalent to :option:`-M -MF file`, except that
+  :option:`-E` is not implied.  The driver determines :samp:`{file}` based on
+  whether an :option:`-o` option is given.  If it is, the driver uses its
+  argument but with a suffix of :samp:`.d`, otherwise it takes the name
+  of the input file, removes any directory components and suffix, and
+  applies a :samp:`.d` suffix.
+
+  If :option:`-MD` is used in conjunction with :option:`-E`, any
+  :option:`-o` switch is understood to specify the dependency output file
+  (see :option:`-MF`), but if used without :option:`-E`, each :option:`-o`
+  is understood to specify a target object file.
+
+  Since :option:`-E` is not implied, :option:`-MD` can be used to generate
+  a dependency output file as a side effect of the compilation process.
+
+.. option:: -MMD
+
+  Like :option:`-MD` except mention only user header files, not system
+  header files.
+
+.. option:: -fpreprocessed
+
+  Indicate to the preprocessor that the input file has already been
+  preprocessed.  This suppresses things like macro expansion, trigraph
+  conversion, escaped newline splicing, and processing of most directives.
+  The preprocessor still recognizes and removes comments, so that you can
+  pass a file preprocessed with :option:`-C` to the compiler without
+  problems.  In this mode the integrated preprocessor is little more than
+  a tokenizer for the front ends.
+
+  :option:`-fpreprocessed` is implicit if the input file has one of the
+  extensions :samp:`.i`, :samp:`.ii` or :samp:`.mi`.  These are the
+  extensions that GCC uses for preprocessed files created by
+  :option:`-save-temps`.
+
+.. option:: -fdirectives-only
+
+  When preprocessing, handle directives, but do not expand macros.
+
+  The option's behavior depends on the :option:`-E` and :option:`-fpreprocessed`
+  options.
+
+  With :option:`-E`, preprocessing is limited to the handling of directives
+  such as ``#define``, ``#ifdef``, and ``#error``.  Other
+  preprocessor operations, such as macro expansion and trigraph
+  conversion are not performed.  In addition, the :option:`-dD` option is
+  implicitly enabled.
+
+  With :option:`-fpreprocessed`, predefinition of command line and most
+  builtin macros is disabled.  Macros such as ``__LINE__``, which are
+  contextually dependent, are handled normally.  This enables compilation of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+  With both :option:`-E` and :option:`-fpreprocessed`, the rules for
+  :option:`-fpreprocessed` take precedence.  This enables full preprocessing of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+.. option:: -fdollars-in-identifiers
+
+  Accept :samp:`$` in identifiers.
+
+  .. only:: cpp
+
+    See :ref:`identifier-characters`.
+
+.. option:: -fextended-identifiers
+
+  Accept universal character names and extended characters in
+  identifiers.  This option is enabled by default for C99 (and later C
+  standard versions) and C++.
+
+.. option:: -fno-canonical-system-headers
+
+  When preprocessing, do not shorten system header paths with canonicalization.
+
+.. option:: -fmax-include-depth={depth}
+
+  Set the maximum depth of the nested #include. The default is 200.
+
+.. option:: -ftabstop={width}
+
+  Set the distance between tab stops.  This helps the preprocessor report
+  correct column numbers in warnings or errors, even if tabs appear on the
+  line.  If the value is less than 1 or greater than 100, the option is
+  ignored.  The default is 8.
+
+.. option:: -ftrack-macro-expansion[={level}]
+
+  Track locations of tokens across macro expansions. This allows the
+  compiler to emit diagnostic about the current macro expansion stack
+  when a compilation error occurs in a macro expansion. Using this
+  option makes the preprocessor and the compiler consume more
+  memory. The :samp:`{level}` parameter can be used to choose the level of
+  precision of token location tracking thus decreasing the memory
+  consumption if necessary. Value :samp:`0` of :samp:`{level}` de-activates
+  this option. Value :samp:`1` tracks tokens locations in a
+  degraded mode for the sake of minimal memory overhead. In this mode
+  all tokens resulting from the expansion of an argument of a
+  function-like macro have the same location. Value :samp:`2` tracks
+  tokens locations completely. This value is the most memory hungry.
+  When this option is given no argument, the default parameter value is
+  :samp:`2`.
+
+  Note that ``-ftrack-macro-expansion=2`` is activated by default.
+
+.. option:: -fmacro-prefix-map={old}={new}
+
+  When preprocessing files residing in directory :samp:`{old}`,
+  expand the ``__FILE__`` and ``__BASE_FILE__`` macros as if the
+  files resided in directory :samp:`{new}` instead.  This can be used
+  to change an absolute path to a relative path by using :samp:`.` for
+  :samp:`{new}` which can result in more reproducible builds that are
+  location independent.  This option also affects
+  ``__builtin_FILE()`` during compilation.  See also
+  :option:`-ffile-prefix-map`.
+
+.. index:: character set, execution
+
+.. option:: -fexec-charset={charset}
+
+  Set the execution character set, used for string and character
+  constants.  The default is UTF-8.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. index:: character set, wide execution
+
+.. option:: -fwide-exec-charset={charset}
+
+  Set the wide execution character set, used for wide string and
+  character constants.  The default is one of UTF-32BE, UTF-32LE, UTF-16BE,
+  or UTF-16LE, whichever corresponds to the width of ``wchar_t`` and the
+  big-endian or little-endian byte order being used for code generation.  As
+  with :option:`-fexec-charset`, :samp:`{charset}` can be any encoding supported
+  by the system's ``iconv`` library routine; however, you will have
+  problems with encodings that do not fit exactly in ``wchar_t``.
+
+.. index:: character set, input
+
+.. option:: -finput-charset={charset}
+
+  Set the input character set, used for translation from the character
+  set of the input file to the source character set used by GCC.  If the
+  locale does not specify, or GCC cannot get this information from the
+  locale, the default is UTF-8.  This can be overridden by either the locale
+  or this command-line option.  Currently the command-line option takes
+  precedence if there's a conflict.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. only:: not cpp
+
+  .. option:: -fpch-deps
+
+    When using precompiled headers (see :ref:`precompiled-headers`), this flag
+    causes the dependency-output flags to also list the files from the
+    precompiled header's dependencies.  If not specified, only the
+    precompiled header are listed and not the files that were used to
+    create it, because those files are not consulted when a precompiled
+    header is used.
+
+  .. option:: -fpch-preprocess
+
+    This option allows use of a precompiled header (see :ref:`precompiled-headers`) together with :option:`-E`.  It inserts a special ``#pragma``,
+    ``#pragma GCC pch_preprocess "filename"`` in the output to mark
+    the place where the precompiled header was found, and its :samp:`{filename}`.
+    When :option:`-fpreprocessed` is in use, GCC recognizes this ``#pragma``
+    and loads the PCH.
+
+    This option is off by default, because the resulting preprocessed output
+    is only really suitable as input to GCC.  It is switched on by
+    :option:`-save-temps`.
+
+    You should not write this ``#pragma`` in your own code, but it is
+    safe to edit the filename if the PCH file is available in a different
+    location.  The filename may be absolute or it may be relative to GCC's
+    current directory.
+
+.. option:: -fworking-directory
+
+  Enable generation of linemarkers in the preprocessor output that
+  let the compiler know the current working directory at the time of
+  preprocessing.  When this option is enabled, the preprocessor
+  emits, after the initial linemarker, a second linemarker with the
+  current working directory followed by two slashes.  GCC uses this
+  directory, when it's present in the preprocessed input, as the
+  directory emitted as the current working directory in some debugging
+  information formats.  This option is implicitly enabled if debugging
+  information is enabled, but this can be inhibited with the negated
+  form :option:`-fno-working-directory`.  If the :option:`-P` flag is
+  present in the command line, this option has no effect, since no
+  ``#line`` directives are emitted whatsoever.
+
+.. option:: -fno-working-directory
+
+  Default setting; overrides :option:`-fworking-directory`.
+
+.. option:: -A {predicate}={answer}
+
+  Make an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.  This form is preferred to the older form :option:`-A
+  predicate(answer)`, which is still supported, because
+  it does not use shell special characters.
+
+  .. only:: cpp
+
+    See :ref:`obsolete-features`.
+
+.. option:: -A -predicate=answer
+
+  Cancel an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.
+
+.. option:: -C
+
+  Do not discard comments.  All comments are passed through to the output
+  file, except for comments in processed directives, which are deleted
+  along with the directive.
+
+  You should be prepared for side effects when using :option:`-C` ; it
+  causes the preprocessor to treat comments as tokens in their own right.
+  For example, comments appearing at the start of what would be a
+  directive line have the effect of turning that line into an ordinary
+  source line, since the first token on the line is no longer a :samp:`#`.
+
+.. option:: -CC
+
+  Do not discard comments, including during macro expansion.  This is
+  like :option:`-C`, except that comments contained within macros are
+  also passed through to the output file where the macro is expanded.
+
+  In addition to the side effects of the :option:`-C` option, the
+  :option:`-CC` option causes all C++-style comments inside a macro
+  to be converted to C-style comments.  This is to prevent later use
+  of that macro from inadvertently commenting out the remainder of
+  the source line.
+
+  The :option:`-CC` option is generally used to support lint comments.
+
+.. option:: -P
+
+  Inhibit generation of linemarkers in the output from the preprocessor.
+  This might be useful when running the preprocessor on something that is
+  not C code, and will be sent to a program which might be confused by the
+  linemarkers.
+
+  .. only:: cpp
+
+    See :ref:`preprocessor-output`.
+
+  .. index:: traditional C language, C language, traditional
+
+.. option:: -traditional, -traditional-cpp
+
+  Try to imitate the behavior of pre-standard C preprocessors, as
+  opposed to ISO C preprocessors.
+
+  .. only:: cpp
+
+    See :ref:`traditional-mode`.
+
+  .. only:: not cpp
+
+    See the GNU CPP manual for details.
+
+  Note that GCC does not otherwise attempt to emulate a pre-standard
+  C compiler, and these options are only supported with the :option:`-E`
+  switch, or when invoking CPP explicitly.
+
+.. option:: -trigraphs
+
+  Support ISO C trigraphs.
+  These are three-character sequences, all starting with :samp:`??`, that
+  are defined by ISO C to stand for single characters.  For example,
+  :samp:`??/` stands for :samp:`\\`, so :samp:`??/n` is a character
+  constant for a newline.
+
+  .. only:: cpp
+
+    See :ref:`initial-processing`.
+
+  .. only:: not cpp
+
+    The nine trigraphs and their replacements are
+
+    .. code-block::
+
+      Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+      Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+  By default, GCC ignores trigraphs, but in
+  standard-conforming modes it converts them.  See the :option:`-std` and
+  :option:`-ansi` options.
+
+.. option:: -remap
+
+  Enable special code to work around file systems which only permit very
+  short file names, such as MS-DOS.
+
+.. option:: -H
+
+  Print the name of each header file used, in addition to other normal
+  activities.  Each name is indented to show how deep in the
+  :samp:`#include` stack it is.  Precompiled header files are also
+  printed, even if they are found to be invalid; an invalid precompiled
+  header file is printed with :samp:`...x` and a valid one with :samp:`...!` .
+
+.. option:: -dletters
+
+  Says to make debugging dumps during compilation as specified by
+  :samp:`{letters}`.  The flags documented here are those relevant to the
+  preprocessor.  Other :samp:`{letters}` are interpreted
+  by the compiler proper, or reserved for future versions of GCC, and so
+  are silently ignored.  If you specify :samp:`{letters}` whose behavior
+  conflicts, the result is undefined.
+
+  .. only:: not cpp
+
+    See :ref:`developer-options`, for more information.
+
+  .. option:: -dM
+
+    Instead of the normal output, generate a list of :samp:`#define`
+    directives for all the macros defined during the execution of the
+    preprocessor, including predefined macros.  This gives you a way of
+    finding out what is predefined in your version of the preprocessor.
+    Assuming you have no file :samp:`foo.h`, the command
+
+    .. code-block:: c++
+
+      touch foo.h; cpp -dM foo.h
+
+    shows all the predefined macros.
+
+    .. only:: cpp
+
+      If you use :option:`-dM` without the :option:`-E` option, :option:`-dM` is
+      interpreted as a synonym for :option:`-fdump-rtl-mach`.
+      See :ref:`developer-options`.
+
+  .. option:: -dD
+
+    Like :option:`-dM` except in two respects: it does *not* include the
+    predefined macros, and it outputs *both* the :samp:`#define`
+    directives and the result of preprocessing.  Both kinds of output go to
+    the standard output file.
+
+  .. option:: -dN
+
+    Like :option:`-dD`, but emit only the macro names, not their expansions.
+
+  .. option:: -dI
+
+    Output :samp:`#include` directives in addition to the result of
+    preprocessing.
+
+  .. option:: -dU
+
+    Like :option:`-dD` except that only macros that are expanded, or whose
+    definedness is tested in preprocessor directives, are output; the
+    output is delayed until the use or test of the macro; and
+    :samp:`#undef` directives are also output for macros tested but
+    undefined at the time.
+
+.. option:: -fdebug-cpp
+
+  This option is only useful for debugging GCC.  When used from CPP or with
+  :option:`-E`, it dumps debugging information about location maps.  Every
+  token in the output is preceded by the dump of the map its location
+  belongs to.
+
+  When used from GCC without :option:`-E`, this option has no effect.
\ No newline at end of file
diff --git a/doc/cppwarnopts.rst b/doc/cppwarnopts.rst
new file mode 100644
index 00000000000..8e9e9e7276f
--- /dev/null
+++ b/doc/cppwarnopts.rst
@@ -0,0 +1,4 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
\ No newline at end of file
diff --git a/doc/favicon.ico b/doc/favicon.ico
new file mode 100644
index 00000000000..42e8969edc8
Binary files /dev/null and b/doc/favicon.ico differ
diff --git a/doc/funding.rst b/doc/funding.rst
new file mode 100644
index 00000000000..ee4daca6fd7
--- /dev/null
+++ b/doc/funding.rst
@@ -0,0 +1,47 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+Funding Free Software
+=====================
+
+If you want to have more free software a few years from now, it makes
+sense for you to help encourage people to contribute funds for its
+development.  The most effective approach known is to encourage
+commercial redistributors to donate.
+
+Users of free software systems can boost the pace of development by
+encouraging for-a-fee distributors to donate part of their selling price
+to free software developers-the Free Software Foundation, and others.
+
+The way to convince distributors to do this is to demand it and expect
+it from them.  So when you compare distributors, judge them partly by
+how much they give to free software development.  Show distributors
+they must compete to be the one who gives the most.
+
+To make this approach work, you must insist on numbers that you can
+compare, such as, 'We will donate ten dollars to the Frobnitz project
+for each disk sold.'  Don't be satisfied with a vague promise, such as
+'A portion of the profits are donated,' since it doesn't give a basis
+for comparison.
+
+Even a precise fraction 'of the profits from this disk' is not very
+meaningful, since creative accounting and unrelated business decisions
+can greatly alter what fraction of the sales price counts as profit.
+If the price you pay is $50, ten percent of the profit is probably
+less than a dollar; it might be a few cents, or nothing at all.
+
+Some redistributors do development work themselves.  This is useful too;
+but to keep everyone honest, you need to inquire how much they do, and
+what kind.  Some kinds of development make much more long-term
+difference than others.  For example, maintaining a separate version of
+a program contributes very little; maintaining the standard version of a
+program for the whole community contributes much.  Easy new ports
+contribute little, since someone else would surely do them; difficult
+ports such as adding a new CPU to the GNU Compiler Collection contribute more;
+major new features or packages contribute the most.
+
+By establishing the idea that supporting further development is 'the
+proper thing to do' when distributing free software for a fee, we can
+assure a steady flow of resources into making more free software.
\ No newline at end of file
diff --git a/doc/gcc_sphinx.py b/doc/gcc_sphinx.py
new file mode 100644
index 00000000000..2ef15aef944
--- /dev/null
+++ b/doc/gcc_sphinx.py
@@ -0,0 +1,44 @@
+# GCC Sphinx customization
+
+__version__ = '1.0'
+
+
+def setup(app):
+    app.add_object_type('gcc-attr', 'gcc-attr', objname='GCC attribute',
+                        indextemplate='pair: %s; attribute')
+    app.add_object_type('fn-attr', 'fn-attr', objname='function attribute',
+                        indextemplate='pair: %s; function attribute')
+    app.add_object_type('var-attr', 'var-attr', objname='variable attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('type-attr', 'type-attr', objname='type attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('enum-attr', 'enum-attr', objname='Enumerator attribute',
+                        indextemplate='pair: %s; enumerator attribute')
+    app.add_object_type('label-attr', 'label-attr', objname='Label attribute',
+                        indextemplate='pair: %s; label attribute')
+    app.add_object_type('gcc-param', 'gcc-param', objname='GCC parameter',
+                        indextemplate='pair: %s; parameter')
+
+    targets = (('AArch64 ', 'aarch64'), ('AMD GCN ', 'amd-gcn'), ('ARC ', 'arc'), ('ARM ', 'arm'), ('AVR ', 'avr'),
+               ('Blackfin ', 'blackfin'), ('BPF ', 'bpf'), ('C-SKY ', 'c-sky'),
+               ('Epiphany ', 'epiphany'), ('H8/300 ', 'h8-300'), ('IA-64 ', 'ia-64'), ('LoongArch', 'loongarch'), ('M32C ', 'm32c'),
+               ('M32R/D ', 'm32r-d'), ('m68k ', 'm68k'), ('MCORE ', 'mcore'), ('MeP ', 'mep'),
+               ('MicroBlaze ', 'microblaze'), ('Microsoft Windows ', 'microsoft-windows'), ('MIPS ', 'mips'),
+               ('MSP430 ', 'msp430'), ('NDS32 ', 'nds32'), ('Nios II ', 'nios-ii'), ('Nvidia PTX ', 'nvidia-ptx'),
+               ('PowerPC ', 'powerpc'), ('RISC-V ', 'risc-v'), ('RL78 ', 'rl78'), ('RX ', 'rx'), ('S/390 ', 's-390'),
+               ('SH ', 'sh'), ('Symbian OS ', 'symbian-os'), ('V850 ', 'v850'), ('Visium ', 'visium'), ('x86 ', 'x86'),
+               ('Xstormy16 ', 'xstormy16'))
+
+    for target_name, target in targets:
+        app.add_object_type(f'{target}-fn-attr', f'{target}-fn-attr', objname=f'{target_name} function attribute',
+                            indextemplate=f'pair: %s; {target_name} function attribute')
+        app.add_object_type(f'{target}-var-attr', f'{target}-var-attr', objname=f'{target_name} variable attribute',
+                            indextemplate=f'pair: %s; {target_name} variable attribute')
+        app.add_object_type(f'{target}-type-attr', f'{target}-type-attr', objname=f'{target_name} type attribute',
+                            indextemplate=f'pair: %s; {target_name} type attribute')
+
+    return dict(
+        version=__version__,
+        parallel_read_safe=True,
+        parallel_write_safe=True
+    )
diff --git a/doc/gnu.rst b/doc/gnu.rst
new file mode 100644
index 00000000000..930659b250b
--- /dev/null
+++ b/doc/gnu.rst
@@ -0,0 +1,19 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu-project:
+
+The GNU Project and GNU/Linux
+=============================
+
+The GNU Project was launched in 1984 to develop a complete Unix-like
+operating system which is free software: the GNU system.  (GNU is a
+recursive acronym for 'GNU's Not Unix'; it is pronounced
+'guh-NEW'.)  Variants of the GNU operating system, which use the
+kernel Linux, are now widely used; though these systems are often
+referred to as 'Linux', they are more accurately called GNU/Linux
+systems.
+
+For more information, see: https://www.gnu.org/ and https://www.gnu.org/gnu/linux-and-gnu.html.
\ No newline at end of file
diff --git a/doc/gnu_free_documentation_license.rst b/doc/gnu_free_documentation_license.rst
new file mode 100644
index 00000000000..5a7d110efde
--- /dev/null
+++ b/doc/gnu_free_documentation_license.rst
@@ -0,0 +1,476 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu_fdl:
+
+******************************
+GNU Free Documentation License
+******************************
+
+Version 1.3, 3 November 2008
+
+Copyright  2000, 2001, 2002, 2007, 2008  Free Software Foundation, Inc
+https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+~~~~~~~~
+
+The purpose of this License is to make a manual, textbook, or other
+functional and useful document "free" in the sense of freedom: to
+assure everyone the effective freedom to copy and redistribute it,
+with or without modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and publisher a way
+to get credit for their work, while not being considered responsible
+for modifications made by others.
+
+This License is a kind of "copyleft", which means that derivative
+works of the document must themselves be free in the same sense.  It
+complements the GNU General Public License, which is a copyleft
+license designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free
+program should come with manuals providing the same freedoms that the
+software does.  But this License is not limited to software manuals;
+it can be used for any textual work, regardless of subject matter or
+whether it is published as a printed book.  We recommend this License
+principally for works whose purpose is instruction or reference.
+
+1. APPLICABILITY AND DEFINITIONS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This License applies to any manual or other work, in any medium, that
+contains a notice placed by the copyright holder saying it can be
+distributed under the terms of this License.  Such a notice grants a
+world-wide, royalty-free license, unlimited in duration, to use that
+work under the conditions stated herein.  The **Document**, below,
+refers to any such manual or work.  Any member of the public is a
+licensee, and is addressed as "**you**".  You accept the license if you
+copy, modify or distribute the work in a way requiring permission
+under copyright law.
+
+A "**Modified Version**" of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+A "**Secondary Section**" is a named appendix or a front-matter section of
+the Document that deals exclusively with the relationship of the
+publishers or authors of the Document to the Document's overall subject
+(or to related matters) and contains nothing that could fall directly
+within that overall subject.  (Thus, if the Document is in part a
+textbook of mathematics, a Secondary Section may not explain any
+mathematics.)  The relationship could be a matter of historical
+connection with the subject or with related matters, or of legal,
+commercial, philosophical, ethical or political position regarding
+them.
+
+The "**Invariant Sections**" are certain Secondary Sections whose titles
+are designated, as being those of Invariant Sections, in the notice
+that says that the Document is released under this License.  If a
+section does not fit the above definition of Secondary then it is not
+allowed to be designated as Invariant.  The Document may contain zero
+Invariant Sections.  If the Document does not identify any Invariant
+Sections then there are none.
+
+The "**Cover Texts**" are certain short passages of text that are listed,
+as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+the Document is released under this License.  A Front-Cover Text may
+be at most 5 words, and a Back-Cover Text may be at most 25 words.
+
+A "**Transparent**" copy of the Document means a machine-readable copy,
+represented in a format whose specification is available to the
+general public, that is suitable for revising the document
+straightforwardly with generic text editors or (for images composed of
+pixels) generic paint programs or (for drawings) some widely available
+drawing editor, and that is suitable for input to text formatters or
+for automatic translation to a variety of formats suitable for input
+to text formatters.  A copy made in an otherwise Transparent file
+format whose markup, or absence of markup, has been arranged to thwart
+or discourage subsequent modification by readers is not Transparent.
+An image format is not Transparent if used for any substantial amount
+of text.  A copy that is not "Transparent" is called **Opaque**.
+
+Examples of suitable formats for Transparent copies include plain
+ASCII without markup, Texinfo input format, LaTeX input format, SGML
+or XML using a publicly available DTD, and standard-conforming simple
+HTML, PostScript or PDF designed for human modification.  Examples of
+transparent image formats include PNG, XCF and JPG.  Opaque formats
+include proprietary formats that can be read and edited only by
+proprietary word processors, SGML or XML for which the DTD and/or
+processing tools are not generally available, and the
+machine-generated HTML, PostScript or PDF produced by some word
+processors for output purposes only.
+
+The "**Title Page**" means, for a printed book, the title page itself,
+plus such following pages as are needed to hold, legibly, the material
+this License requires to appear in the title page.  For works in
+formats which do not have any title page as such, "Title Page" means
+the text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+The "**publisher**" means any person or entity that distributes
+copies of the Document to the public.
+
+A section "**Entitled XYZ**" means a named subunit of the Document whose
+title either is precisely XYZ or contains XYZ in parentheses following
+text that translates XYZ in another language.  (Here XYZ stands for a
+specific section name mentioned below, such as "**Acknowledgements**",
+"**Dedications**", "**Endorsements**", or "**History**".)
+To "**Preserve the Title**"
+of such a section when you modify the Document means that it remains a
+section "Entitled XYZ" according to this definition.
+
+The Document may include Warranty Disclaimers next to the notice which
+states that this License applies to the Document.  These Warranty
+Disclaimers are considered to be included by reference in this
+License, but only as regards disclaiming warranties: any other
+implication that these Warranty Disclaimers may have is void and has
+no effect on the meaning of this License.
+
+2. VERBATIM COPYING
+~~~~~~~~~~~~~~~~~~~
+
+You may copy and distribute the Document in any medium, either
+commercially or noncommercially, provided that this License, the
+copyright notices, and the license notice saying this License applies
+to the Document are reproduced in all copies, and that you add no other
+conditions whatsoever to those of this License.  You may not use
+technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute.  However, you may accept
+compensation in exchange for copies.  If you distribute a large enough
+number of copies you must also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+3. COPYING IN QUANTITY
+~~~~~~~~~~~~~~~~~~~~~~
+
+If you publish printed copies (or copies in media that commonly have
+printed covers) of the Document, numbering more than 100, and the
+Document's license notice requires Cover Texts, you must enclose the
+copies in covers that carry, clearly and legibly, all these Cover
+Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+the back cover.  Both covers must also clearly and legibly identify
+you as the publisher of these copies.  The front cover must present
+the full title with all words of the title equally prominent and
+visible.  You may add other material on the covers in addition.
+Copying with changes limited to the covers, as long as they preserve
+the title of the Document and satisfy these conditions, can be treated
+as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute Opaque copies of the Document numbering
+more than 100, you must either include a machine-readable Transparent
+copy along with each Opaque copy, or state in or with each Opaque copy
+a computer-network location from which the general network-using
+public has access to download using public-standard network protocols
+a complete Transparent copy of the Document, free of added material.
+If you use the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity, to ensure
+that this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you distribute an
+Opaque copy (directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the authors of the
+Document well before redistributing any large number of copies, to give
+them a chance to provide you with an updated version of the Document.
+
+4. MODIFICATIONS
+~~~~~~~~~~~~~~~~
+
+You may copy and distribute a Modified Version of the Document under
+the conditions of sections 2 and 3 above, provided that you release
+the Modified Version under precisely this License, with the Modified
+Version filling the role of the Document, thus licensing distribution
+and modification of the Modified Version to whoever possesses a copy
+of it.  In addition, you must do these things in the Modified Version:
+
+A. Use in the Title Page (and on the covers, if any) a title distinct
+   from that of the Document, and from those of previous versions
+   (which should, if there were any, be listed in the History section
+   of the Document).  You may use the same title as a previous version
+   if the original publisher of that version gives permission.
+
+B. List on the Title Page, as authors, one or more persons or entities
+   responsible for authorship of the modifications in the Modified
+   Version, together with at least five of the principal authors of the
+   Document (all of its principal authors, if it has fewer than five),
+   unless they release you from this requirement.
+
+C. State on the Title page the name of the publisher of the
+   Modified Version, as the publisher.
+
+D. Preserve all the copyright notices of the Document.
+
+E. Add an appropriate copyright notice for your modifications
+   adjacent to the other copyright notices.
+
+F. Include, immediately after the copyright notices, a license notice
+   giving the public permission to use the Modified Version under the
+   terms of this License, in the form shown in the Addendum below.
+
+G. Preserve in that license notice the full lists of Invariant Sections
+   and required Cover Texts given in the Document's license notice.
+H. Include an unaltered copy of this License.
+
+I. Preserve the section Entitled "History", Preserve its Title, and add
+   to it an item stating at least the title, year, new authors, and
+   publisher of the Modified Version as given on the Title Page.  If
+   there is no section Entitled "History" in the Document, create one
+   stating the title, year, authors, and publisher of the Document as
+   given on its Title Page, then add an item describing the Modified
+   Version as stated in the previous sentence.
+
+J. Preserve the network location, if any, given in the Document for
+   public access to a Transparent copy of the Document, and likewise
+   the network locations given in the Document for previous versions
+   it was based on.  These may be placed in the "History" section.
+   You may omit a network location for a work that was published at
+   least four years before the Document itself, or if the original
+   publisher of the version it refers to gives permission.
+
+K. For any section Entitled "Acknowledgements" or "Dedications",
+   Preserve the Title of the section, and preserve in the section all
+   the substance and tone of each of the contributor acknowledgements
+   and/or dedications given therein.
+
+L. Preserve all the Invariant Sections of the Document,
+   unaltered in their text and in their titles.  Section numbers
+   or the equivalent are not considered part of the section titles.
+
+M. Delete any section Entitled "Endorsements".  Such a section
+   may not be included in the Modified Version.
+
+N. Do not retitle any existing section to be Entitled "Endorsements"
+   or to conflict in title with any Invariant Section.
+
+O. Preserve any Warranty Disclaimers.
+
+If the Modified Version includes new front-matter sections or
+appendices that qualify as Secondary Sections and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant.  To do this, add their titles to the
+list of Invariant Sections in the Modified Version's license notice.
+These titles must be distinct from any other section titles.
+
+You may add a section Entitled "Endorsements", provided it contains
+nothing but endorsements of your Modified Version by various
+parties---for example, statements of peer review or that the text has
+been approved by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover Text, and a
+passage of up to 25 words as a Back-Cover Text, to the end of the list
+of Cover Texts in the Modified Version.  Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or
+through arrangements made by) any one entity.  If the Document already
+includes a cover text for the same cover, previously added by you or
+by arrangement made by the same entity you are acting on behalf of,
+you may not add another; but you may replace the old one, on explicit
+permission from the previous publisher that added the old one.
+
+The author(s) and publisher(s) of the Document do not by this License
+give permission to use their names for publicity for or to assert or
+imply endorsement of any Modified Version.
+
+5. COMBINING DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~
+
+You may combine the Document with other documents released under this
+License, under the terms defined in section 4 above for modified
+versions, provided that you include in the combination all of the
+Invariant Sections of all of the original documents, unmodified, and
+list them all as Invariant Sections of your combined work in its
+license notice, and that you preserve all their Warranty Disclaimers.
+
+The combined work need only contain one copy of this License, and
+multiple identical Invariant Sections may be replaced with a single
+copy.  If there are multiple Invariant Sections with the same name but
+different contents, make the title of each such section unique by
+adding at the end of it, in parentheses, the name of the original
+author or publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list of
+Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections Entitled "History"
+in the various original documents, forming one section Entitled
+"History"; likewise combine any sections Entitled "Acknowledgements",
+and any sections Entitled "Dedications".  You must delete all sections
+Entitled "Endorsements".
+
+6. COLLECTIONS OF DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+You may make a collection consisting of the Document and other documents
+released under this License, and replace the individual copies of this
+License in the various documents with a single copy that is included in
+the collection, provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+7. AGGREGATION WITH INDEPENDENT WORKS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A compilation of the Document or its derivatives with other separate
+and independent documents or works, in or on a volume of a storage or
+distribution medium, is called an "aggregate" if the copyright
+resulting from the compilation is not used to limit the legal rights
+of the compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License does not
+apply to the other works in the aggregate which are not themselves
+derivative works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to these
+copies of the Document, then if the Document is less than one half of
+the entire aggregate, the Document's Cover Texts may be placed on
+covers that bracket the Document within the aggregate, or the
+electronic equivalent of covers if the Document is in electronic form.
+Otherwise they must appear on printed covers that bracket the whole
+aggregate.
+
+8. TRANSLATION
+~~~~~~~~~~~~~~
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of section 4.
+Replacing Invariant Sections with translations requires special
+permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections.  You may include a
+translation of this License, and all the license notices in the
+Document, and any Warranty Disclaimers, provided that you also include
+the original English version of this License and the original versions
+of those notices and disclaimers.  In case of a disagreement between
+the translation and the original version of this License or a notice
+or disclaimer, the original version will prevail.
+
+If a section in the Document is Entitled "Acknowledgements",
+"Dedications", or "History", the requirement (section 4) to Preserve
+its Title (section 1) will typically require changing the actual
+title.
+
+9. TERMINATION
+~~~~~~~~~~~~~~
+
+You may not copy, modify, sublicense, or distribute the Document
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense, or distribute it is void, and
+will automatically terminate your rights under this License.
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, receipt of a copy of some or all of the same material does
+not give you any rights to use it.
+
+10. FUTURE REVISIONS OF THIS LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The Free Software Foundation may publish new, revised versions
+of the GNU Free Documentation License from time to time.  Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.  See
+https://www.gnu.org/copyleft/.
+
+Each version of the License is given a distinguishing version number.
+If the Document specifies that a particular numbered version of this
+License "or any later version" applies to it, you have the option of
+following the terms and conditions either of that specified version or
+of any later version that has been published (not as a draft) by the
+Free Software Foundation.  If the Document does not specify a version
+number of this License, you may choose any version ever published (not
+as a draft) by the Free Software Foundation.  If the Document
+specifies that a proxy can decide which future versions of this
+License can be used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version for the
+Document.
+
+11. RELICENSING
+~~~~~~~~~~~~~~~
+
+"Massive Multiauthor Collaboration Site" (or "MMC Site") means any
+World Wide Web server that publishes copyrightable works and also
+provides prominent facilities for anybody to edit those works.  A
+public wiki that anybody can edit is an example of such a server.  A
+"Massive Multiauthor Collaboration" (or "MMC") contained in the
+site means any set of copyrightable works thus published on the MMC
+site.
+
+"CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
+license published by Creative Commons Corporation, a not-for-profit
+corporation with a principal place of business in San Francisco,
+California, as well as future copyleft versions of that license
+published by that same organization.
+
+"Incorporate" means to publish or republish a Document, in whole or
+in part, as part of another Document.
+
+An MMC is "eligible for relicensing" if it is licensed under this
+License, and if all works that were first published under this License
+somewhere other than this MMC, and subsequently incorporated in whole
+or in part into the MMC, (1) had no cover texts or invariant sections,
+and (2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained in the site
+under CC-BY-SA on the same site at any time before August 1, 2009,
+provided the MMC is eligible for relicensing.
+
+ADDENDUM: How to use this License for your documents
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and
+license notices just after the title page:
+
+    Copyright © YEAR  YOUR NAME.
+    Permission is granted to copy, distribute and/or modify this document
+    under the terms of the GNU Free Documentation License, Version 1.3
+    or any later version published by the Free Software Foundation;
+    with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+    A copy of the license is included in the section entitled "GNU
+    Free Documentation License".
+
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the "with ... Texts." line with this:
+
+    with the Invariant Sections being LIST THEIR TITLES, with the
+    Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
+
+If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of
+free software license, such as the GNU General Public License,
+to permit their use in free software.
\ No newline at end of file
diff --git a/doc/gpl-3.0.rst b/doc/gpl-3.0.rst
new file mode 100644
index 00000000000..07ffd72b375
--- /dev/null
+++ b/doc/gpl-3.0.rst
@@ -0,0 +1,707 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU GENERAL PUBLIC LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Version 3, 29 June 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+########
+
+The GNU General Public License is a free, copyleft license for software
+and other kinds of works.
+
+The licenses for most software and other practical works are designed to
+take away your freedom to share and change the works. By contrast, the
+GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users. We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
+your programs, too.
+
+When we speak of free software, we are referring to freedom, not price.
+Our General Public Licenses are designed to make sure that you have the
+freedom to distribute copies of free software (and charge for them if
+you wish), that you receive source code or can get it if you want it,
+that you can change the software or use pieces of it in new free
+programs, and that you know you can do these things.
+
+To protect your rights, we need to prevent others from denying you these
+rights or asking you to surrender the rights. Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+For example, if you distribute copies of such a program, whether gratis
+or for a fee, you must pass on to the recipients the same freedoms that
+you received. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+Developers that use the GNU GPL protect your rights with two steps: (1)
+assert copyright on the software, and (2) offer you this License giving
+you legal permission to copy, distribute and/or modify it.
+
+For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software. For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so. This is fundamentally incompatible with the aim of protecting
+users' freedom to change the software. The systematic pattern of such
+abuse occurs in the area of products for individuals to use, which is
+precisely where it is most unacceptable. Therefore, we have designed
+this version of the GPL to prohibit the practice for those products. If
+such problems arise substantially in other domains, we stand ready to
+extend this provision to those domains in future versions of the GPL, as
+needed to protect the freedom of users.
+
+Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary. To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+TERMS AND CONDITIONS
+####################
+
+0. Definitions.
+^^^^^^^^^^^^^^^
+
+"This License" refers to version 3 of the GNU General Public License.
+
+"Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+"The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
+"recipients" may be individuals or organizations.
+
+To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy. The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+A "covered work" means either the unmodified Program or a work based on
+the Program.
+
+To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+An interactive user interface displays "Appropriate Legal Notices" to
+the extent that it includes a convenient and prominently visible feature
+that (1) displays an appropriate copyright notice, and (2) tells the
+user that there is no warranty for the work (except to the extent that
+warranties are provided), that licensees may convey the work under this
+License, and how to view a copy of this License. If the interface
+presents a list of user commands or options, such as a menu, a prominent
+item in the list meets this criterion.
+
+1. Source Code.
+^^^^^^^^^^^^^^^
+
+The "source code" for a work means the preferred form of the work for
+making modifications to it. "Object code" means any non-source form of a
+work.
+
+A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that is
+widely used among developers working in that language.
+
+The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that Major
+Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form. A "Major
+Component", in this context, means a major essential component (kernel,
+window system, and so on) of the specific operating system (if any) on
+which the executable work runs, or a compiler used to produce the work,
+or an object code interpreter used to run it.
+
+The "Corresponding Source" for a work in object code form means all the
+source code needed to generate, install, and (for an executable work)
+run the object code and to modify the work, including scripts to control
+those activities. However, it does not include the work's System
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+7. Additional Terms.
+^^^^^^^^^^^^^^^^^^^^
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+^^^^^^^^^^^^^^^
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+9. Acceptance Not Required for Having Copies.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+10. Automatic Licensing of Downstream Recipients.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Each time you convey a covered work, the recipient automatically
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+patent claim is infringed by making, using, selling, offering for sale,
+or importing the Program or any portion of it.
+
+11. Patents.
+^^^^^^^^^^^^
+
+A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The work
+thus licensed is called the contributor's "contributor version".
+
+A contributor's "essential patent claims" are all patent claims owned or
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+definition, "control" includes the right to grant patent sublicenses in
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+
+Each contributor grants you a non-exclusive, worldwide, royalty-free
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+
+Nothing in this License shall be construed as excluding or limiting any
+implied license or other defenses to infringement that may otherwise be
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+
+12. No Surrender of Others' Freedom.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
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+Program.
+
+13. Use with the GNU Affero General Public License.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Notwithstanding any other provision of this License, you have permission
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+
+14. Revised Versions of this License.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+The Free Software Foundation may publish revised and/or new versions of
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+Each version is given a distinguishing version number. If the Program
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+
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+However, no additional obligations are imposed on any author or
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+15. Disclaimer of Warranty.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
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+
+16. Limitation of Liability.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES
+SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE
+WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN
+ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If the disclaimer of warranty and limitation of liability provided above
+cannot be given local legal effect according to their terms, reviewing
+courts shall apply local law that most closely approximates an absolute
+waiver of all civil liability in connection with the Program, unless a
+warranty or assumption of liability accompanies a copy of the Program in
+return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+#############################################
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+::
+
+        <one line to give the program's name and a brief idea of what it does.>
+        Copyright (C) <year>  <name of author>
+
+        This program is free software: you can redistribute it and/or modify
+        it under the terms of the GNU General Public License as published by
+        the Free Software Foundation, either version 3 of the License, or
+        (at your option) any later version.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+        GNU General Public License for more details.
+
+        You should have received a copy of the GNU General Public License
+        along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice
+like this when it starts in an interactive mode:
+
+::
+
+        <program>  Copyright (C) <year>  <name of author>
+        This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+        This is free software, and you are welcome to redistribute it
+        under certain conditions; type `show c' for details.
+
+The hypothetical commands \`show w' and \`show c' should show the
+appropriate parts of the General Public License. Of course, your
+program's commands might be different; for a GUI interface, you would
+use an "about box".
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow the
+GNU GPL, see https://www.gnu.org/licenses/.
+
+The GNU General Public License does not permit incorporating your
+program into proprietary programs. If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library. If this is what you want to do, use the
+GNU Lesser General Public License instead of this License. But first,
+please read https://www.gnu.org/licenses/why-not-lgpl.html.
\ No newline at end of file
diff --git a/doc/indices-and-tables.rst b/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..92bf73bcb0a
--- /dev/null
+++ b/doc/indices-and-tables.rst
@@ -0,0 +1,13 @@
+.. only:: html
+
+  Indexes and tables
+  ==================
+
+  :ref:`genindex`
+
+  .. only:: development
+
+    TODO
+    ----
+
+    .. todolist::
\ No newline at end of file
diff --git a/doc/lgpl-2.1.rst b/doc/lgpl-2.1.rst
new file mode 100644
index 00000000000..845de30d8d4
--- /dev/null
+++ b/doc/lgpl-2.1.rst
@@ -0,0 +1,514 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU LESSER GENERAL PUBLIC LICENSE
+---------------------------------
+
+.. index:: LGPL, Lesser General Public License
+
+Version 2.1, February 1999
+
+Copyright (C) 1991-2022 Free Software Foundation, Inc.
+51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+as the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+
+Preamble
+^^^^^^^^
+
+The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software---to make sure the software is free for all its users.
+
+This license, the Lesser General Public License, applies to some
+specially designated software---typically libraries---of the Free
+Software Foundation and other authors who decide to use it.  You can use
+it too, but we suggest you first think carefully about whether this
+license or the ordinary General Public License is the better strategy to
+use in any particular case, based on the explanations below.
+
+When we speak of free software, we are referring to freedom of use,
+not price.  Our General Public Licenses are designed to make sure that
+you have the freedom to distribute copies of free software (and charge
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+it if you want it; that you can change the software and use pieces of it
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+That's all there is to it!
\ No newline at end of file
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diff --git a/doc/md.rst b/doc/md.rst
new file mode 100644
index 00000000000..55e0711113e
--- /dev/null
+++ b/doc/md.rst
@@ -0,0 +1,3142 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: simple constraints
+
+.. _simple-constraints:
+
+Simple Constraints
+^^^^^^^^^^^^^^^^^^
+
+The simplest kind of constraint is a string full of letters, each of
+which describes one kind of operand that is permitted.  Here are
+the letters that are allowed:
+
+whitespace
+  Whitespace characters are ignored and can be inserted at any position
+  except the first.  This enables each alternative for different operands to
+  be visually aligned in the machine description even if they have different
+  number of constraints and modifiers.
+
+  .. index:: m in constraint, memory references in constraints
+
+m
+  A memory operand is allowed, with any kind of address that the machine
+  supports in general.
+  Note that the letter used for the general memory constraint can be
+  re-defined by a back end using the ``TARGET_MEM_CONSTRAINT`` macro.
+
+  .. index:: offsettable address, o in constraint
+
+o
+  A memory operand is allowed, but only if the address is
+  :dfn:`offsettable`.  This means that adding a small integer (actually,
+  the width in bytes of the operand, as determined by its machine mode)
+  may be added to the address and the result is also a valid memory
+  address.
+
+  .. index:: autoincrement/decrement addressing
+
+  For example, an address which is constant is offsettable; so is an
+  address that is the sum of a register and a constant (as long as a
+  slightly larger constant is also within the range of address-offsets
+  supported by the machine); but an autoincrement or autodecrement
+  address is not offsettable.  More complicated indirect/indexed
+  addresses may or may not be offsettable depending on the other
+  addressing modes that the machine supports.
+
+  Note that in an output operand which can be matched by another
+  operand, the constraint letter :samp:`o` is valid only when accompanied
+  by both :samp:`<` (if the target machine has predecrement addressing)
+  and :samp:`>` (if the target machine has preincrement addressing).
+
+  .. index:: V in constraint
+
+V
+  A memory operand that is not offsettable.  In other words, anything that
+  would fit the :samp:`m` constraint but not the :samp:`o` constraint.
+
+  .. index:: < in constraint
+
+<
+  A memory operand with autodecrement addressing (either predecrement or
+  postdecrement) is allowed.  In inline ``asm`` this constraint is only
+  allowed if the operand is used exactly once in an instruction that can
+  handle the side effects.  Not using an operand with :samp:`<` in constraint
+  string in the inline ``asm`` pattern at all or using it in multiple
+  instructions isn't valid, because the side effects wouldn't be performed
+  or would be performed more than once.  Furthermore, on some targets
+  the operand with :samp:`<` in constraint string must be accompanied by
+  special instruction suffixes like ``%U0`` instruction suffix on PowerPC
+  or ``%P0`` on IA-64.
+
+  .. index:: > in constraint
+
+>
+  A memory operand with autoincrement addressing (either preincrement or
+  postincrement) is allowed.  In inline ``asm`` the same restrictions
+  as for :samp:`<` apply.
+
+  .. index:: r in constraint, registers in constraints
+
+r
+  A register operand is allowed provided that it is in a general
+  register.
+
+  .. index:: constants in constraints, i in constraint
+
+i
+  An immediate integer operand (one with constant value) is allowed.
+  This includes symbolic constants whose values will be known only at
+  assembly time or later.
+
+  .. index:: n in constraint
+
+n
+  An immediate integer operand with a known numeric value is allowed.
+  Many systems cannot support assembly-time constants for operands less
+  than a word wide.  Constraints for these operands should use :samp:`n`
+  rather than :samp:`i`.
+
+  .. index:: I in constraint
+
+:samp:`{I}, {J}, {K}, ... {P}`
+  Other letters in the range :samp:`I` through :samp:`P` may be defined in
+  a machine-dependent fashion to permit immediate integer operands with
+  explicit integer values in specified ranges.  For example, on the
+  68000, :samp:`I` is defined to stand for the range of values 1 to 8.
+  This is the range permitted as a shift count in the shift
+  instructions.
+
+  .. index:: E in constraint
+
+E
+  An immediate floating operand (expression code ``const_double``) is
+  allowed, but only if the target floating point format is the same as
+  that of the host machine (on which the compiler is running).
+
+  .. index:: F in constraint
+
+F
+  An immediate floating operand (expression code ``const_double`` or
+  ``const_vector``) is allowed.
+
+  .. index:: G in constraint, H in constraint
+
+:samp:`{G}, {H}`
+  :samp:`G` and :samp:`H` may be defined in a machine-dependent fashion to
+  permit immediate floating operands in particular ranges of values.
+
+  .. index:: s in constraint
+
+s
+  An immediate integer operand whose value is not an explicit integer is
+  allowed.
+
+  This might appear strange; if an insn allows a constant operand with a
+  value not known at compile time, it certainly must allow any known
+  value.  So why use :samp:`s` instead of :samp:`i`?  Sometimes it allows
+  better code to be generated.
+
+  For example, on the 68000 in a fullword instruction it is possible to
+  use an immediate operand; but if the immediate value is between -128
+  and 127, better code results from loading the value into a register and
+  using the register.  This is because the load into the register can be
+  done with a :samp:`moveq` instruction.  We arrange for this to happen
+  by defining the letter :samp:`K` to mean 'any integer outside the
+  range -128 to 127', and then specifying :samp:`Ks` in the operand
+  constraints.
+
+  .. index:: g in constraint
+
+g
+  Any register, memory or immediate integer operand is allowed, except for
+  registers that are not general registers.
+
+  .. index:: X in constraint
+
+X
+
+  .. only:: gccint
+
+    Any operand whatsoever is allowed, even if it does not satisfy
+    ``general_operand``.  This is normally used in the constraint of
+    a ``match_scratch`` when certain alternatives will not actually
+    require a scratch register.
+
+  .. only:: not gccint
+
+    Any operand whatsoever is allowed.
+
+  .. index:: 0 in constraint, digits in constraint
+
+:samp:`{0}, {1}, {2}, ... {9}`
+  An operand that matches the specified operand number is allowed.  If a
+  digit is used together with letters within the same alternative, the
+  digit should come last.
+
+  This number is allowed to be more than a single digit.  If multiple
+  digits are encountered consecutively, they are interpreted as a single
+  decimal integer.  There is scant chance for ambiguity, since to-date
+  it has never been desirable that :samp:`10` be interpreted as matching
+  either operand 1 *or* operand 0.  Should this be desired, one
+  can use multiple alternatives instead.
+
+  .. index:: matching constraint, constraint, matching
+
+  This is called a :dfn:`matching constraint` and what it really means is
+  that the assembler has only a single operand that fills two roles
+
+  .. only:: gccint
+
+    considered separate in the RTL insn.  For example, an add insn has two
+    input operands and one output operand in the RTL, but on most CISC
+
+  .. only:: not gccint
+
+    which ``asm`` distinguishes.  For example, an add instruction uses
+    two input operands and an output operand, but on most CISC
+
+  machines an add instruction really has only two operands, one of them an
+  input-output operand:
+
+  .. code-block::
+
+    addl #35,r12
+
+  Matching constraints are used in these circumstances.
+  More precisely, the two operands that match must include one input-only
+  operand and one output-only operand.  Moreover, the digit must be a
+  smaller number than the number of the operand that uses it in the
+  constraint.
+
+  .. only:: gccint
+
+    For operands to match in a particular case usually means that they
+    are identical-looking RTL expressions.  But in a few special cases
+    specific kinds of dissimilarity are allowed.  For example, ``*x``
+    as an input operand will match ``*x++`` as an output operand.
+    For proper results in such cases, the output template should always
+    use the output-operand's number when printing the operand.
+
+  .. index:: load address instruction, push address instruction, address constraints, p in constraint
+
+p
+  An operand that is a valid memory address is allowed.  This is
+  for 'load address' and 'push address' instructions.
+
+  .. index:: address_operand
+
+  :samp:`p` in the constraint must be accompanied by ``address_operand``
+  as the predicate in the ``match_operand``.  This predicate interprets
+  the mode specified in the ``match_operand`` as the mode of the memory
+  reference for which the address would be valid.
+
+  .. index:: other register constraints, extensible constraints
+
+other-letters
+  Other letters can be defined in machine-dependent fashion to stand for
+  particular classes of registers or other arbitrary operand types.
+  :samp:`d`, :samp:`a` and :samp:`f` are defined on the 68000/68020 to stand
+  for data, address and floating point registers.
+
+.. only:: gccint
+
+  In order to have valid assembler code, each operand must satisfy
+  its constraint.  But a failure to do so does not prevent the pattern
+  from applying to an insn.  Instead, it directs the compiler to modify
+  the code so that the constraint will be satisfied.  Usually this is
+  done by copying an operand into a register.
+
+  Contrast, therefore, the two instruction patterns that follow:
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_dup 0)
+                     (match_operand:SI 1 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has two operands, one of which must appear in two places, and
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_operand:SI 1 "general_operand" "0")
+                     (match_operand:SI 2 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has three operands, two of which are required by a constraint to be
+  identical.  If we are considering an insn of the form
+
+  .. code-block:: c++
+
+    (insn n prev next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 6) (reg:SI 109)))
+      ...)
+
+  the first pattern would not apply at all, because this insn does not
+  contain two identical subexpressions in the right place.  The pattern would
+  say, 'That does not look like an add instruction; try other patterns'.
+  The second pattern would say, 'Yes, that's an add instruction, but there
+  is something wrong with it'.  It would direct the reload pass of the
+  compiler to generate additional insns to make the constraint true.  The
+  results might look like this:
+
+  .. code-block:: c++
+
+    (insn n2 prev n
+      (set (reg:SI 3) (reg:SI 6))
+      ...)
+
+    (insn n n2 next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 3) (reg:SI 109)))
+      ...)
+
+  It is up to you to make sure that each operand, in each pattern, has
+  constraints that can handle any RTL expression that could be present for
+  that operand.  (When multiple alternatives are in use, each pattern must,
+  for each possible combination of operand expressions, have at least one
+  alternative which can handle that combination of operands.)  The
+  constraints don't need to *allow* any possible operand---when this is
+  the case, they do not constrain---but they must at least point the way to
+  reloading any possible operand so that it will fit.
+
+  * If the constraint accepts whatever operands the predicate permits,
+    there is no problem: reloading is never necessary for this operand.
+
+    For example, an operand whose constraints permit everything except
+    registers is safe provided its predicate rejects registers.
+
+    An operand whose predicate accepts only constant values is safe
+    provided its constraints include the letter :samp:`i`.  If any possible
+    constant value is accepted, then nothing less than :samp:`i` will do;
+    if the predicate is more selective, then the constraints may also be
+    more selective.
+
+  * Any operand expression can be reloaded by copying it into a register.
+    So if an operand's constraints allow some kind of register, it is
+    certain to be safe.  It need not permit all classes of registers; the
+    compiler knows how to copy a register into another register of the
+    proper class in order to make an instruction valid.
+
+    .. index:: nonoffsettable memory reference, memory reference, nonoffsettable
+
+  * A nonoffsettable memory reference can be reloaded by copying the
+    address into a register.  So if the constraint uses the letter
+    :samp:`o`, all memory references are taken care of.
+
+  * A constant operand can be reloaded by allocating space in memory to
+    hold it as preinitialized data.  Then the memory reference can be used
+    in place of the constant.  So if the constraint uses the letters
+    :samp:`o` or :samp:`m`, constant operands are not a problem.
+
+  * If the constraint permits a constant and a pseudo register used in an insn
+    was not allocated to a hard register and is equivalent to a constant,
+    the register will be replaced with the constant.  If the predicate does
+    not permit a constant and the insn is re-recognized for some reason, the
+    compiler will crash.  Thus the predicate must always recognize any
+    objects allowed by the constraint.
+
+  If the operand's predicate can recognize registers, but the constraint does
+  not permit them, it can make the compiler crash.  When this operand happens
+  to be a register, the reload pass will be stymied, because it does not know
+  how to copy a register temporarily into memory.
+
+  If the predicate accepts a unary operator, the constraint applies to the
+  operand.  For example, the MIPS processor at ISA level 3 supports an
+  instruction which adds two registers in ``SImode`` to produce a
+  ``DImode`` result, but only if the registers are correctly sign
+  extended.  This predicate for the input operands accepts a
+  ``sign_extend`` of an ``SImode`` register.  Write the constraint
+  to indicate the type of register that is required for the operand of the
+  ``sign_extend``.
+
+.. only:: not gccint
+
+  So the first alternative for the 68000's logical-or could be written as
+  ``"+m" (output) : "ir" (input)``.  The second could be ``"+r"
+  (output): "irm" (input)``.  However, the fact that two memory locations
+  cannot be used in a single instruction prevents simply using ``"+rm"
+  (output) : "irm" (input)``.  Using multi-alternatives, this might be
+  written as ``"+m,r" (output) : "ir,irm" (input)``.  This describes
+  all the available alternatives to the compiler, allowing it to choose
+  the most efficient one for the current conditions.
+
+  There is no way within the template to determine which alternative was
+  chosen.  However you may be able to wrap your ``asm`` statements with
+  builtins such as ``__builtin_constant_p`` to achieve the desired results.
+
+.. index:: multiple alternative constraints
+
+.. _multi-alternative:
+
+Multiple Alternative Constraints
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Sometimes a single instruction has multiple alternative sets of possible
+operands.  For example, on the 68000, a logical-or instruction can combine
+register or an immediate value into memory, or it can combine any kind of
+operand into a register; but it cannot combine one memory location into
+another.
+
+These constraints are represented as multiple alternatives.  An alternative
+can be described by a series of letters for each operand.  The overall
+constraint for an operand is made from the letters for this operand
+from the first alternative, a comma, the letters for this operand from
+the second alternative, a comma, and so on until the last alternative.
+All operands for a single instruction must have the same number of
+alternatives.
+
+.. only:: gccint
+
+  Here is how it is done for fullword logical-or on the 68000:
+
+  .. code-block:: c++
+
+    (define_insn "iorsi3"
+      [(set (match_operand:SI 0 "general_operand" "=m,d")
+            (ior:SI (match_operand:SI 1 "general_operand" "%0,0")
+                    (match_operand:SI 2 "general_operand" "dKs,dmKs")))]
+      ...)
+
+  The first alternative has :samp:`m` (memory) for operand 0, :samp:`0` for
+  operand 1 (meaning it must match operand 0), and :samp:`dKs` for operand
+  2.  The second alternative has :samp:`d` (data register) for operand 0,
+  :samp:`0` for operand 1, and :samp:`dmKs` for operand 2.  The :samp:`=` and
+  :samp:`%` in the constraints apply to all the alternatives; their
+  meaning is explained in the next section (see :ref:`class-preferences`).
+
+  If all the operands fit any one alternative, the instruction is valid.
+  Otherwise, for each alternative, the compiler counts how many instructions
+  must be added to copy the operands so that that alternative applies.
+  The alternative requiring the least copying is chosen.  If two alternatives
+  need the same amount of copying, the one that comes first is chosen.
+  These choices can be altered with the :samp:`?` and :samp:`!` characters:
+
+  .. index:: ? in constraint, question mark
+
+  ``?``
+    Disparage slightly the alternative that the :samp:`?` appears in,
+    as a choice when no alternative applies exactly.  The compiler regards
+    this alternative as one unit more costly for each :samp:`?` that appears
+    in it.
+
+    .. index:: ! in constraint, exclamation point
+
+  ``!``
+    Disparage severely the alternative that the :samp:`!` appears in.
+    This alternative can still be used if it fits without reloading,
+    but if reloading is needed, some other alternative will be used.
+
+    .. index:: ^ in constraint, caret
+
+  ``^``
+    This constraint is analogous to :samp:`?` but it disparages slightly
+    the alternative only if the operand with the :samp:`^` needs a reload.
+
+    .. index:: $ in constraint, dollar sign
+
+  ``$``
+    This constraint is analogous to :samp:`!` but it disparages severely
+    the alternative only if the operand with the :samp:`$` needs a reload.
+
+  When an insn pattern has multiple alternatives in its constraints, often
+  the appearance of the assembler code is determined mostly by which
+  alternative was matched.  When this is so, the C code for writing the
+  assembler code can use the variable ``which_alternative``, which is
+  the ordinal number of the alternative that was actually satisfied (0 for
+  the first, 1 for the second alternative, etc.).  See :ref:`output-statement`.
+
+.. _class-preferences:
+
+Register Class Preferences
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. only:: gccint
+
+  .. index:: class preference constraints, register class preference constraints, voting between constraint alternatives
+
+  The operand constraints have another function: they enable the compiler
+  to decide which kind of hardware register a pseudo register is best
+  allocated to.  The compiler examines the constraints that apply to the
+  insns that use the pseudo register, looking for the machine-dependent
+  letters such as :samp:`d` and :samp:`a` that specify classes of registers.
+  The pseudo register is put in whichever class gets the most 'votes'.
+  The constraint letters :samp:`g` and :samp:`r` also vote: they vote in
+  favor of a general register.  The machine description says which registers
+  are considered general.
+
+  Of course, on some machines all registers are equivalent, and no register
+  classes are defined.  Then none of this complexity is relevant.
+
+.. index:: modifiers in constraints, constraint modifier characters
+
+.. _modifiers:
+
+Constraint Modifier Characters
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. prevent bad page break with this line
+
+Here are constraint modifier characters.
+
+.. index:: = in constraint
+
+:samp:`=`
+  Means that this operand is written to by this instruction:
+  the previous value is discarded and replaced by new data.
+
+  .. index:: + in constraint
+
+:samp:`+`
+  Means that this operand is both read and written by the instruction.
+
+  When the compiler fixes up the operands to satisfy the constraints,
+  it needs to know which operands are read by the instruction and
+  which are written by it.  :samp:`=` identifies an operand which is only
+  written; :samp:`+` identifies an operand that is both read and written; all
+  other operands are assumed to only be read.
+
+  If you specify :samp:`=` or :samp:`+` in a constraint, you put it in the
+  first character of the constraint string.
+
+  .. index:: & in constraint, earlyclobber operand
+
+:samp:`&`
+  Means (in a particular alternative) that this operand is an
+  :dfn:`earlyclobber` operand, which is written before the instruction is
+  finished using the input operands.  Therefore, this operand may not lie
+  in a register that is read by the instruction or as part of any memory
+  address.
+
+  :samp:`&` applies only to the alternative in which it is written.  In
+  constraints with multiple alternatives, sometimes one alternative
+  requires :samp:`&` while others do not.  See, for example, the
+  :samp:`movdf` insn of the 68000.
+
+  An operand which is read by the instruction can be tied to an earlyclobber
+  operand if its only use as an input occurs before the early result is
+  written.  Adding alternatives of this form often allows GCC to produce
+  better code when only some of the read operands can be affected by the
+  earlyclobber. See, for example, the :samp:`mulsi3` insn of the ARM.
+
+  Furthermore, if the :dfn:`earlyclobber` operand is also a read/write
+  operand, then that operand is written only after it's used.
+
+  :samp:`&` does not obviate the need to write :samp:`=` or :samp:`+`.  As
+  :dfn:`earlyclobber` operands are always written, a read-only
+  :dfn:`earlyclobber` operand is ill-formed and will be rejected by the
+  compiler.
+
+  .. index:: % in constraint
+
+:samp:`%`
+  Declares the instruction to be commutative for this operand and the
+  following operand.  This means that the compiler may interchange the
+  two operands if that is the cheapest way to make all operands fit the
+  constraints.  :samp:`%` applies to all alternatives and must appear as
+  the first character in the constraint.  Only read-only operands can use
+  :samp:`%`.
+
+  .. only:: gccint
+
+    This is often used in patterns for addition instructions
+    that really have only two operands: the result must go in one of the
+    arguments.  Here for example, is how the 68000 halfword-add
+    instruction is defined:
+
+    .. code-block:: c++
+
+      (define_insn "addhi3"
+        [(set (match_operand:HI 0 "general_operand" "=m,r")
+           (plus:HI (match_operand:HI 1 "general_operand" "%0,0")
+                    (match_operand:HI 2 "general_operand" "di,g")))]
+        ...)
+
+  GCC can only handle one commutative pair in an asm; if you use more,
+  the compiler may fail.  Note that you need not use the modifier if
+  the two alternatives are strictly identical; this would only waste
+  time in the reload pass.
+
+  .. only:: gccint
+
+    The modifier is not operational after
+    register allocation, so the result of ``define_peephole2``
+    and ``define_split`` s performed after reload cannot rely on
+    :samp:`%` to make the intended insn match.
+
+    .. index:: # in constraint
+
+  :samp:`#`
+    Says that all following characters, up to the next comma, are to be
+    ignored as a constraint.  They are significant only for choosing
+    register preferences.
+
+    .. index:: * in constraint
+
+  :samp:`*`
+    Says that the following character should be ignored when choosing
+    register preferences.  :samp:`*` has no effect on the meaning of the
+    constraint as a constraint, and no effect on reloading.  For LRA
+    :samp:`*` additionally disparages slightly the alternative if the
+    following character matches the operand.
+
+    Here is an example: the 68000 has an instruction to sign-extend a
+    halfword in a data register, and can also sign-extend a value by
+    copying it into an address register.  While either kind of register is
+    acceptable, the constraints on an address-register destination are
+    less strict, so it is best if register allocation makes an address
+    register its goal.  Therefore, :samp:`*` is used so that the :samp:`d`
+    constraint letter (for data register) is ignored when computing
+    register preferences.
+
+    .. code-block:: c++
+
+      (define_insn "extendhisi2"
+        [(set (match_operand:SI 0 "general_operand" "=*d,a")
+              (sign_extend:SI
+               (match_operand:HI 1 "general_operand" "0,g")))]
+        ...)
+
+.. index:: machine specific constraints, constraints, machine specific
+
+.. _machine-constraints:
+
+Constraints for Particular Machines
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Whenever possible, you should use the general-purpose constraint letters
+in ``asm`` arguments, since they will convey meaning more readily to
+people reading your code.  Failing that, use the constraint letters
+that usually have very similar meanings across architectures.  The most
+commonly used constraints are :samp:`m` and :samp:`r` (for memory and
+general-purpose registers respectively; see :ref:`simple-constraints`), and
+:samp:`I`, usually the letter indicating the most common
+immediate-constant format.
+
+Each architecture defines additional constraints.  These constraints
+are used by the compiler itself for instruction generation, as well as
+for ``asm`` statements; therefore, some of the constraints are not
+particularly useful for ``asm``.  Here is a summary of some of the
+machine-dependent constraints available on some particular machines;
+it includes both constraints that are useful for ``asm`` and
+constraints that aren't.  The compiler source file mentioned in the
+table heading for each architecture is the definitive reference for
+the meanings of that architecture's constraints.
+
+.. Please keep this table alphabetized by target!
+
+AArch64 family---:samp:`{config/aarch64/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``k``
+  The stack pointer register (``SP``)
+
+``w``
+  Floating point register, Advanced SIMD vector register or SVE vector register
+
+``x``
+  Like ``w``, but restricted to registers 0 to 15 inclusive.
+
+``y``
+  Like ``w``, but restricted to registers 0 to 7 inclusive.
+
+``Upl``
+  One of the low eight SVE predicate registers (``P0`` to ``P7``)
+
+``Upa``
+  Any of the SVE predicate registers (``P0`` to ``P15``)
+
+``I``
+  Integer constant that is valid as an immediate operand in an ``ADD``
+  instruction
+
+``J``
+  Integer constant that is valid as an immediate operand in a ``SUB``
+  instruction (once negated)
+
+``K``
+  Integer constant that can be used with a 32-bit logical instruction
+
+``L``
+  Integer constant that can be used with a 64-bit logical instruction
+
+``M``
+  Integer constant that is valid as an immediate operand in a 32-bit ``MOV``
+  pseudo instruction. The ``MOV`` may be assembled to one of several different
+  machine instructions depending on the value
+
+``N``
+  Integer constant that is valid as an immediate operand in a 64-bit ``MOV``
+  pseudo instruction
+
+``S``
+  An absolute symbolic address or a label reference
+
+``Y``
+  Floating point constant zero
+
+``Z``
+  Integer constant zero
+
+``Ush``
+  The high part (bits 12 and upwards) of the pc-relative address of a symbol
+  within 4GB of the instruction
+
+``Q``
+  A memory address which uses a single base register with no offset
+
+``Ump``
+  A memory address suitable for a load/store pair instruction in SI, DI, SF and
+  DF modes
+
+AMD GCN ---:samp:`{config/gcn/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Immediate integer in the range -16 to 64
+
+``J``
+  Immediate 16-bit signed integer
+
+``Kf``
+  Immediate constant -1
+
+``L``
+  Immediate 15-bit unsigned integer
+
+``A``
+  Immediate constant that can be inlined in an instruction encoding: integer
+  -16..64, or float 0.0, +/-0.5, +/-1.0, +/-2.0,
+  +/-4.0, 1.0/(2.0\*PI)
+
+``B``
+  Immediate 32-bit signed integer that can be attached to an instruction encoding
+
+``C``
+  Immediate 32-bit integer in range -16..4294967295 (i.e. 32-bit unsigned
+  integer or :samp:`A` constraint)
+
+``DA``
+  Immediate 64-bit constant that can be split into two :samp:`A` constants
+
+``DB``
+  Immediate 64-bit constant that can be split into two :samp:`B` constants
+
+``U``
+  Any ``unspec``
+
+``Y``
+  Any ``symbol_ref`` or ``label_ref``
+
+``v``
+  VGPR register
+
+``Sg``
+  SGPR register
+
+``SD``
+  SGPR registers valid for instruction destinations, including VCC, M0 and EXEC
+
+``SS``
+  SGPR registers valid for instruction sources, including VCC, M0, EXEC and SCC
+
+``Sm``
+  SGPR registers valid as a source for scalar memory instructions (excludes M0
+  and EXEC)
+
+``Sv``
+  SGPR registers valid as a source or destination for vector instructions
+  (excludes EXEC)
+
+``ca``
+  All condition registers: SCC, VCCZ, EXECZ
+
+``cs``
+  Scalar condition register: SCC
+
+``cV``
+  Vector condition register: VCC, VCC_LO, VCC_HI
+
+``e``
+  EXEC register (EXEC_LO and EXEC_HI)
+
+``RB``
+  Memory operand with address space suitable for ``buffer_*`` instructions
+
+``RF``
+  Memory operand with address space suitable for ``flat_*`` instructions
+
+``RS``
+  Memory operand with address space suitable for ``s_*`` instructions
+
+``RL``
+  Memory operand with address space suitable for ``ds_*`` LDS instructions
+
+``RG``
+  Memory operand with address space suitable for ``ds_*`` GDS instructions
+
+``RD``
+  Memory operand with address space suitable for any ``ds_*`` instructions
+
+``RM``
+  Memory operand with address space suitable for ``global_*`` instructions
+
+ARC ---:samp:`{config/arc/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``q``
+  Registers usable in ARCompact 16-bit instructions: ``r0`` - ``r3``,
+  ``r12`` - ``r15``.  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``e``
+  Registers usable as base-regs of memory addresses in ARCompact 16-bit memory
+  instructions: ``r0`` - ``r3``, ``r12`` - ``r15``, ``sp``.
+  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``D``
+  ARC FPX (dpfp) 64-bit registers. ``D0``, ``D1``.
+
+``I``
+  A signed 12-bit integer constant.
+
+``Cal``
+  constant for arithmetic/logical operations.  This might be any constant
+  that can be put into a long immediate by the assmbler or linker without
+  involving a PIC relocation.
+
+``K``
+  A 3-bit unsigned integer constant.
+
+``L``
+  A 6-bit unsigned integer constant.
+
+``CnL``
+  One's complement of a 6-bit unsigned integer constant.
+
+``CmL``
+  Two's complement of a 6-bit unsigned integer constant.
+
+``M``
+  A 5-bit unsigned integer constant.
+
+``O``
+  A 7-bit unsigned integer constant.
+
+``P``
+  A 8-bit unsigned integer constant.
+
+``H``
+  Any const_double value.
+
+ARM family---:samp:`{config/arm/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``h``
+  In Thumb state, the core registers ``r8`` - ``r15``.
+
+``k``
+  The stack pointer register.
+
+``l``
+  In Thumb State the core registers ``r0`` - ``r7``.  In ARM state this
+  is an alias for the ``r`` constraint.
+
+``t``
+  VFP floating-point registers ``s0`` - ``s31``.  Used for 32 bit values.
+
+``w``
+  VFP floating-point registers ``d0`` - ``d31`` and the appropriate
+  subset ``d0`` - ``d15`` based on command line options.
+  Used for 64 bit values only.  Not valid for Thumb1.
+
+``y``
+  The iWMMX co-processor registers.
+
+``z``
+  The iWMMX GR registers.
+
+``G``
+  The floating-point constant 0.0
+
+``I``
+  Integer that is valid as an immediate operand in a data processing
+  instruction.  That is, an integer in the range 0 to 255 rotated by a
+  multiple of 2
+
+``J``
+  Integer in the range -4095 to 4095
+
+``K``
+  Integer that satisfies constraint :samp:`I` when inverted (ones complement)
+
+``L``
+  Integer that satisfies constraint :samp:`I` when negated (twos complement)
+
+``M``
+  Integer in the range 0 to 32
+
+``Q``
+  A memory reference where the exact address is in a single register
+  (':samp:`m`' is preferable for ``asm`` statements)
+
+``R``
+  An item in the constant pool
+
+``S``
+  A symbol in the text segment of the current file
+
+``Uv``
+  A memory reference suitable for VFP load/store insns (reg+constant offset)
+
+``Uy``
+  A memory reference suitable for iWMMXt load/store instructions.
+
+``Uq``
+  A memory reference suitable for the ARMv4 ldrsb instruction.
+
+AVR family---:samp:`{config/avr/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``l``
+  Registers from r0 to r15
+
+``a``
+  Registers from r16 to r23
+
+``d``
+  Registers from r16 to r31
+
+``w``
+  Registers from r24 to r31.  These registers can be used in :samp:`adiw` command
+
+``e``
+  Pointer register (r26--r31)
+
+``b``
+  Base pointer register (r28--r31)
+
+``q``
+  Stack pointer register (SPH:SPL)
+
+``t``
+  Temporary register r0
+
+``x``
+  Register pair X (r27:r26)
+
+``y``
+  Register pair Y (r29:r28)
+
+``z``
+  Register pair Z (r31:r30)
+
+``I``
+  Constant greater than -1, less than 64
+
+``J``
+  Constant greater than -64, less than 1
+
+``K``
+  Constant integer 2
+
+``L``
+  Constant integer 0
+
+``M``
+  Constant that fits in 8 bits
+
+``N``
+  Constant integer -1
+
+``O``
+  Constant integer 8, 16, or 24
+
+``P``
+  Constant integer 1
+
+``G``
+  A floating point constant 0.0
+
+``Q``
+  A memory address based on Y or Z pointer with displacement.
+
+Blackfin family---:samp:`{config/bfin/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  P register
+
+``d``
+  D register
+
+``z``
+  A call clobbered P register.
+
+:samp:`q{n}`
+  A single register.  If :samp:`{n}` is in the range 0 to 7, the corresponding D
+  register.  If it is ``A``, then the register P0.
+
+``D``
+  Even-numbered D register
+
+``W``
+  Odd-numbered D register
+
+``e``
+  Accumulator register.
+
+``A``
+  Even-numbered accumulator register.
+
+``B``
+  Odd-numbered accumulator register.
+
+``b``
+  I register
+
+``v``
+  B register
+
+``f``
+  M register
+
+``c``
+  Registers used for circular buffering, i.e. I, B, or L registers.
+
+``C``
+  The CC register.
+
+``t``
+  LT0 or LT1.
+
+``k``
+  LC0 or LC1.
+
+``u``
+  LB0 or LB1.
+
+``x``
+  Any D, P, B, M, I or L register.
+
+``y``
+  Additional registers typically used only in prologues and epilogues: RETS,
+  RETN, RETI, RETX, RETE, ASTAT, SEQSTAT and USP.
+
+``w``
+  Any register except accumulators or CC.
+
+``Ksh``
+  Signed 16 bit integer (in the range -32768 to 32767)
+
+``Kuh``
+  Unsigned 16 bit integer (in the range 0 to 65535)
+
+``Ks7``
+  Signed 7 bit integer (in the range -64 to 63)
+
+``Ku7``
+  Unsigned 7 bit integer (in the range 0 to 127)
+
+``Ku5``
+  Unsigned 5 bit integer (in the range 0 to 31)
+
+``Ks4``
+  Signed 4 bit integer (in the range -8 to 7)
+
+``Ks3``
+  Signed 3 bit integer (in the range -3 to 4)
+
+``Ku3``
+  Unsigned 3 bit integer (in the range 0 to 7)
+
+:samp:`P{n}`
+  Constant :samp:`{n}`, where :samp:`{n}` is a single-digit constant in the range 0 to 4.
+
+``PA``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use with either accumulator.
+
+``PB``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use only with accumulator A1.
+
+``M1``
+  Constant 255.
+
+``M2``
+  Constant 65535.
+
+``J``
+  An integer constant with exactly a single bit set.
+
+``L``
+  An integer constant with all bits set except exactly one.
+
+``H``, ``Q``
+
+  Any SYMBOL_REF.
+
+C-SKY---:samp:`{config/csky/constraints.md}`
+
+``a``
+  The mini registers r0 - r7.
+
+``b``
+  The low registers r0 - r15.
+
+``c``
+  C register.
+
+``y``
+  HI and LO registers.
+
+``l``
+  LO register.
+
+``h``
+  HI register.
+
+``v``
+  Vector registers.
+
+``z``
+  Stack pointer register (SP).
+
+``Q``
+  A memory address which uses a base register with a short offset
+  or with a index register with its scale.
+
+``W``
+  A memory address which uses a base register with a index register
+  with its scale.
+
+.. only:: gccint
+
+  The C-SKY back end supports a large set of additional constraints
+  that are only useful for instruction selection or splitting rather
+  than inline asm, such as constraints representing constant integer
+  ranges accepted by particular instruction encodings.
+  Refer to the source code for details.
+
+Epiphany---:samp:`{config/epiphany/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``U16``
+  An unsigned 16-bit constant.
+
+``K``
+  An unsigned 5-bit constant.
+
+``L``
+  A signed 11-bit constant.
+
+``Cm1``
+  A signed 11-bit constant added to -1.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cl1``
+  Left-shift of -1, i.e., a bit mask with a block of leading ones, the rest
+  being a block of trailing zeroes.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cr1``
+  Right-shift of -1, i.e., a bit mask with a trailing block of ones, the
+  rest being zeroes.  Or to put it another way, one less than a power of two.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cal``
+  Constant for arithmetic/logical operations.
+  This is like ``i``, except that for position independent code,
+  no symbols / expressions needing relocations are allowed.
+
+``Csy``
+  Symbolic constant for call/jump instruction.
+
+``Rcs``
+  The register class usable in short insns.  This is a register class
+  constraint, and can thus drive register allocation.
+  This constraint won't match unless :option:`-mprefer-short-insn-regs` is
+  in effect.
+
+``Rsc``
+  The register class of registers that can be used to hold a
+  sibcall call address.  I.e., a caller-saved register.
+
+``Rct``
+  Core control register class.
+
+``Rgs``
+  The register group usable in short insns.
+  This constraint does not use a register class, so that it only
+  passively matches suitable registers, and doesn't drive register allocation.
+
+.. only:: gccint
+
+  ``Car``
+    Constant suitable for the addsi3_r pattern.  This is a valid offset
+    For byte, halfword, or word addressing.
+
+``Rra``
+  Matches the return address if it can be replaced with the link register.
+
+``Rcc``
+  Matches the integer condition code register.
+
+``Sra``
+  Matches the return address if it is in a stack slot.
+
+``Cfm``
+  Matches control register values to switch fp mode, which are encapsulated in
+  ``UNSPEC_FP_MODE``.
+
+FRV---:samp:`{config/frv/frv.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register in the class ``ACC_REGS`` (``acc0`` to ``acc7``).
+
+``b``
+  Register in the class ``EVEN_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``c``
+  Register in the class ``CC_REGS`` (``fcc0`` to ``fcc3`` and
+  ``icc0`` to ``icc3``).
+
+``d``
+  Register in the class ``GPR_REGS`` (``gr0`` to ``gr63``).
+
+``e``
+  Register in the class ``EVEN_REGS`` (``gr0`` to ``gr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``f``
+  Register in the class ``FPR_REGS`` (``fr0`` to ``fr63``).
+
+``h``
+  Register in the class ``FEVEN_REGS`` (``fr0`` to ``fr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``l``
+  Register in the class ``LR_REG`` (the ``lr`` register).
+
+``q``
+  Register in the class ``QUAD_REGS`` (``gr2`` to ``gr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``t``
+  Register in the class ``ICC_REGS`` (``icc0`` to ``icc3``).
+
+``u``
+  Register in the class ``FCC_REGS`` (``fcc0`` to ``fcc3``).
+
+``v``
+  Register in the class ``ICR_REGS`` (``cc4`` to ``cc7``).
+
+``w``
+  Register in the class ``FCR_REGS`` (``cc0`` to ``cc3``).
+
+``x``
+  Register in the class ``QUAD_FPR_REGS`` (``fr0`` to ``fr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``z``
+  Register in the class ``SPR_REGS`` (``lcr`` and ``lr``).
+
+``A``
+  Register in the class ``QUAD_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``B``
+  Register in the class ``ACCG_REGS`` (``accg0`` to ``accg7``).
+
+``C``
+  Register in the class ``CR_REGS`` (``cc0`` to ``cc7``).
+
+``G``
+  Floating point constant zero
+
+``I``
+  6-bit signed integer constant
+
+``J``
+  10-bit signed integer constant
+
+``L``
+  16-bit signed integer constant
+
+``M``
+  16-bit unsigned integer constant
+
+``N``
+  12-bit signed integer constant that is negative---i.e. in the
+  range of -2048 to -1
+
+``O``
+  Constant zero
+
+``P``
+  12-bit signed integer constant that is greater than zero---i.e. in the
+  range of 1 to 2047.
+
+FT32---:samp:`{config/ft32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``e``
+  An offset address.
+
+``f``
+  An offset address.
+
+``O``
+  The constant zero or one
+
+``I``
+  A 16-bit signed constant (-32768 ... 32767)
+
+``w``
+  A bitfield mask suitable for bext or bins
+
+``x``
+  An inverted bitfield mask suitable for bext or bins
+
+``L``
+  A 16-bit unsigned constant, multiple of 4 (0 ... 65532)
+
+``S``
+  A 20-bit signed constant (-524288 ... 524287)
+
+``b``
+  A constant for a bitfield width (1 ... 16)
+
+``KA``
+  A 10-bit signed constant (-512 ... 511)
+
+Hewlett-Packard PA-RISC---:samp:`{config/pa/pa.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register 1
+
+``f``
+  Floating point register
+
+``q``
+  Shift amount register
+
+``x``
+  Floating point register (deprecated)
+
+``y``
+  Upper floating point register (32-bit), floating point register (64-bit)
+
+``Z``
+  Any register
+
+``I``
+  Signed 11-bit integer constant
+
+``J``
+  Signed 14-bit integer constant
+
+``K``
+  Integer constant that can be deposited with a ``zdepi`` instruction
+
+``L``
+  Signed 5-bit integer constant
+
+``M``
+  Integer constant 0
+
+``N``
+  Integer constant that can be loaded with a ``ldil`` instruction
+
+``O``
+  Integer constant whose value plus one is a power of 2
+
+``P``
+  Integer constant that can be used for ``and`` operations in ``depi``
+  and ``extru`` instructions
+
+``S``
+  Integer constant 31
+
+``U``
+  Integer constant 63
+
+``G``
+  Floating-point constant 0.0
+
+``A``
+  A ``lo_sum`` data-linkage-table memory operand
+
+``Q``
+  A memory operand that can be used as the destination operand of an
+  integer store instruction
+
+``R``
+  A scaled or unscaled indexed memory operand
+
+``T``
+  A memory operand for floating-point loads and stores
+
+``W``
+  A register indirect memory operand
+
+Intel IA-64---:samp:`{config/ia64/ia64.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register ``r0`` to ``r3`` for ``addl`` instruction
+
+``b``
+  Branch register
+
+``c``
+  Predicate register (:samp:`c` as in 'conditional')
+
+``d``
+  Application register residing in M-unit
+
+``e``
+  Application register residing in I-unit
+
+``f``
+  Floating-point register
+
+``m``
+  Memory operand.  If used together with :samp:`<` or :samp:`>`,
+  the operand can have postincrement and postdecrement which
+  require printing with :samp:`%Pn` on IA-64.
+
+``G``
+  Floating-point constant 0.0 or 1.0
+
+``I``
+  14-bit signed integer constant
+
+``J``
+  22-bit signed integer constant
+
+``K``
+  8-bit signed integer constant for logical instructions
+
+``L``
+  8-bit adjusted signed integer constant for compare pseudo-ops
+
+``M``
+  6-bit unsigned integer constant for shift counts
+
+``N``
+  9-bit signed integer constant for load and store postincrements
+
+``O``
+  The constant zero
+
+``P``
+  0 or -1 for ``dep`` instruction
+
+``Q``
+  Non-volatile memory for floating-point loads and stores
+
+``R``
+  Integer constant in the range 1 to 4 for ``shladd`` instruction
+
+``S``
+  Memory operand except postincrement and postdecrement.  This is
+  now roughly the same as :samp:`m` when not used together with :samp:`<`
+  or :samp:`>`.
+
+M32C---:samp:`{config/m32c/m32c.cc}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Rsp`` ``Rfb`` ``Rsb``
+  :samp:`$sp`, :samp:`$fb`, :samp:`$sb`.
+
+``Rcr``
+  Any control register, when they're 16 bits wide (nothing if control
+  registers are 24 bits wide)
+
+``Rcl``
+  Any control register, when they're 24 bits wide.
+
+``R0w`` ``R1w`` ``R2w`` ``R3w``
+  $r0, $r1, $r2, $r3.
+
+``R02``
+  $r0 or $r2, or $r2r0 for 32 bit values.
+
+``R13``
+  $r1 or $r3, or $r3r1 for 32 bit values.
+
+``Rdi``
+  A register that can hold a 64 bit value.
+
+``Rhl``
+  $r0 or $r1 (registers with addressable high/low bytes)
+
+``R23``
+  $r2 or $r3
+
+``Raa``
+  Address registers
+
+``Raw``
+  Address registers when they're 16 bits wide.
+
+``Ral``
+  Address registers when they're 24 bits wide.
+
+``Rqi``
+  Registers that can hold QI values.
+
+``Rad``
+  Registers that can be used with displacements ($a0, $a1, $sb).
+
+``Rsi``
+  Registers that can hold 32 bit values.
+
+``Rhi``
+  Registers that can hold 16 bit values.
+
+``Rhc``
+  Registers chat can hold 16 bit values, including all control
+  registers.
+
+``Rra``
+  $r0 through R1, plus $a0 and $a1.
+
+``Rfl``
+  The flags register.
+
+``Rmm``
+  The memory-based pseudo-registers $mem0 through $mem15.
+
+``Rpi``
+  Registers that can hold pointers (16 bit registers for r8c, m16c; 24
+  bit registers for m32cm, m32c).
+
+``Rpa``
+  Matches multiple registers in a PARALLEL to form a larger register.
+  Used to match function return values.
+
+``Is3``
+  -8 ... 7
+
+``IS1``
+  -128 ... 127
+
+``IS2``
+  -32768 ... 32767
+
+``IU2``
+  0 ... 65535
+
+``In4``
+  -8 ... -1 or 1 ... 8
+
+``In5``
+  -16 ... -1 or 1 ... 16
+
+``In6``
+  -32 ... -1 or 1 ... 32
+
+``IM2``
+  -65536 ... -1
+
+``Ilb``
+  An 8 bit value with exactly one bit set.
+
+``Ilw``
+  A 16 bit value with exactly one bit set.
+
+``Sd``
+  The common src/dest memory addressing modes.
+
+``Sa``
+  Memory addressed using $a0 or $a1.
+
+``Si``
+  Memory addressed with immediate addresses.
+
+``Ss``
+  Memory addressed using the stack pointer ($sp).
+
+``Sf``
+  Memory addressed using the frame base register ($fb).
+
+``Ss``
+  Memory addressed using the small base register ($sb).
+
+``S1``
+  $r1h
+
+LoongArch---:samp:`{config/loongarch/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``k``
+  A memory operand whose address is formed by a base register and
+  (optionally scaled) index register.
+
+``l``
+  A signed 16-bit constant.
+
+``m``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``st.w`` and ``ld.w``.
+
+``I``
+  A signed 12-bit constant (for arithmetic instructions).
+
+``K``
+  An unsigned 12-bit constant (for logic instructions).
+
+``ZB``
+  An address that is held in a general-purpose register.
+  The offset is zero.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll.w`` and ``sc.w``.
+
+MicroBlaze---:samp:`{config/microblaze/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general register (``r0`` to ``r31``).
+
+``z``
+  A status register (``rmsr``, ``$fcc1`` to ``$fcc7``).
+
+MIPS---:samp:`{config/mips/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general-purpose register.  This is equivalent to ``r`` unless
+  generating MIPS16 code, in which case the MIPS16 register set is used.
+
+``f``
+  A floating-point register (if available).
+
+``h``
+  Formerly the ``hi`` register.  This constraint is no longer supported.
+
+``l``
+  The ``lo`` register.  Use this register to store values that are
+  no bigger than a word.
+
+``x``
+  The concatenated ``hi`` and ``lo`` registers.  Use this register
+  to store doubleword values.
+
+``c``
+  A register suitable for use in an indirect jump.  This will always be
+  ``$25`` for :option:`-mabicalls`.
+
+``v``
+  Register ``$3``.  Do not use this constraint in new code;
+  it is retained only for compatibility with glibc.
+
+``y``
+  Equivalent to ``r`` ; retained for backwards compatibility.
+
+``z``
+  A floating-point condition code register.
+
+``I``
+  A signed 16-bit constant (for arithmetic instructions).
+
+``J``
+  Integer zero.
+
+``K``
+  An unsigned 16-bit constant (for logic instructions).
+
+``L``
+  A signed 32-bit constant in which the lower 16 bits are zero.
+  Such constants can be loaded using ``lui``.
+
+``M``
+  A constant that cannot be loaded using ``lui``, ``addiu``
+  or ``ori``.
+
+``N``
+  A constant in the range -65535 to -1 (inclusive).
+
+``O``
+  A signed 15-bit constant.
+
+``P``
+  A constant in the range 1 to 65535 (inclusive).
+
+``G``
+  Floating-point zero.
+
+``R``
+  An address that can be used in a non-macro load or store.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll`` and ``sc``.
+
+``ZD``
+  An address suitable for a ``prefetch`` instruction, or for any other
+  instruction with the same addressing mode as ``prefetch``.
+
+Motorola 680x0---:samp:`{config/m68k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register
+
+``d``
+  Data register
+
+``f``
+  68881 floating-point register, if available
+
+``I``
+  Integer in the range 1 to 8
+
+``J``
+  16-bit signed number
+
+``K``
+  Signed number whose magnitude is greater than 0x80
+
+``L``
+  Integer in the range -8 to -1
+
+``M``
+  Signed number whose magnitude is greater than 0x100
+
+``N``
+  Range 24 to 31, rotatert:SI 8 to 1 expressed as rotate
+
+``O``
+  16 (for rotate using swap)
+
+``P``
+  Range 8 to 15, rotatert:HI 8 to 1 expressed as rotate
+
+``R``
+  Numbers that mov3q can handle
+
+``G``
+  Floating point constant that is not a 68881 constant
+
+``S``
+  Operands that satisfy 'm' when -mpcrel is in effect
+
+``T``
+  Operands that satisfy 's' when -mpcrel is not in effect
+
+``Q``
+  Address register indirect addressing mode
+
+``U``
+  Register offset addressing
+
+``W``
+  const_call_operand
+
+``Cs``
+  symbol_ref or const
+
+``Ci``
+  const_int
+
+``C0``
+  const_int 0
+
+``Cj``
+  Range of signed numbers that don't fit in 16 bits
+
+``Cmvq``
+  Integers valid for mvq
+
+``Capsw``
+  Integers valid for a moveq followed by a swap
+
+``Cmvz``
+  Integers valid for mvz
+
+``Cmvs``
+  Integers valid for mvs
+
+``Ap``
+  push_operand
+
+``Ac``
+  Non-register operands allowed in clr
+
+Moxie---:samp:`{config/moxie/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``I``
+  A constant in the range of 0 to 255.
+
+``N``
+  A constant in the range of 0 to -255.
+
+MSP430---:samp:`{config/msp430/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R12``
+  Register R12.
+
+``R13``
+  Register R13.
+
+``K``
+  Integer constant 1.
+
+``L``
+  Integer constant -1^20..1^19.
+
+``M``
+  Integer constant 1-4.
+
+``Ya``
+  Memory references which do not require an extended MOVX instruction.
+
+``Yl``
+  Memory reference, labels only.
+
+``Ys``
+  Memory reference, stack only.
+
+NDS32---:samp:`{config/nds32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``w``
+  LOW register class $r0 to $r7 constraint for V3/V3M ISA.
+
+``l``
+  LOW register class $r0 to $r7.
+
+``d``
+  MIDDLE register class $r0 to $r11, $r16 to $r19.
+
+``h``
+  HIGH register class $r12 to $r14, $r20 to $r31.
+
+``t``
+  Temporary assist register $ta (i.e. $r15).
+
+``k``
+  Stack register $sp.
+
+``Iu03``
+  Unsigned immediate 3-bit value.
+
+``In03``
+  Negative immediate 3-bit value in the range of -7--0.
+
+``Iu04``
+  Unsigned immediate 4-bit value.
+
+``Is05``
+  Signed immediate 5-bit value.
+
+``Iu05``
+  Unsigned immediate 5-bit value.
+
+``In05``
+  Negative immediate 5-bit value in the range of -31--0.
+
+``Ip05``
+  Unsigned immediate 5-bit value for movpi45 instruction with range 16--47.
+
+``Iu06``
+  Unsigned immediate 6-bit value constraint for addri36.sp instruction.
+
+``Iu08``
+  Unsigned immediate 8-bit value.
+
+``Iu09``
+  Unsigned immediate 9-bit value.
+
+``Is10``
+  Signed immediate 10-bit value.
+
+``Is11``
+  Signed immediate 11-bit value.
+
+``Is15``
+  Signed immediate 15-bit value.
+
+``Iu15``
+  Unsigned immediate 15-bit value.
+
+``Ic15``
+  A constant which is not in the range of imm15u but ok for bclr instruction.
+
+``Ie15``
+  A constant which is not in the range of imm15u but ok for bset instruction.
+
+``It15``
+  A constant which is not in the range of imm15u but ok for btgl instruction.
+
+``Ii15``
+  A constant whose compliment value is in the range of imm15u
+  and ok for bitci instruction.
+
+``Is16``
+  Signed immediate 16-bit value.
+
+``Is17``
+  Signed immediate 17-bit value.
+
+``Is19``
+  Signed immediate 19-bit value.
+
+``Is20``
+  Signed immediate 20-bit value.
+
+``Ihig``
+  The immediate value that can be simply set high 20-bit.
+
+``Izeb``
+  The immediate value 0xff.
+
+``Izeh``
+  The immediate value 0xffff.
+
+``Ixls``
+  The immediate value 0x01.
+
+``Ix11``
+  The immediate value 0x7ff.
+
+``Ibms``
+  The immediate value with power of 2.
+
+``Ifex``
+  The immediate value with power of 2 minus 1.
+
+``U33``
+  Memory constraint for 333 format.
+
+``U45``
+  Memory constraint for 45 format.
+
+``U37``
+  Memory constraint for 37 format.
+
+Nios II family---:samp:`{config/nios2/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``J``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking only the upper 16-bits of a
+  32-bit number. Range 32-bit numbers with the lower
+  16-bits being 0.
+
+``L``
+  Integer that is valid as an immediate operand for a
+  shift instruction. Range 0 to 31.
+
+``M``
+  Integer that is valid as an immediate operand for
+  only the value 0. Can be used in conjunction with
+  the format modifier ``z`` to use ``r0``
+  instead of ``0`` in the assembly output.
+
+``N``
+  Integer that is valid as an immediate operand for
+  a custom instruction opcode. Range 0 to 255.
+
+``P``
+  An immediate operand for R2 andchi/andci instructions.
+
+``S``
+  Matches immediates which are addresses in the small
+  data section and therefore can be added to ``gp``
+  as a 16-bit immediate to re-create their 32-bit value.
+
+``U``
+  Matches constants suitable as an operand for the rdprs and
+  cache instructions.
+
+``v``
+  A memory operand suitable for Nios II R2 load/store
+  exclusive instructions.
+
+``w``
+  A memory operand suitable for load/store IO and cache
+  instructions.
+
+.. only:: gccint
+
+  ``T``
+    A ``const`` wrapped ``UNSPEC`` expression,
+    representing a supported PIC or TLS relocation.
+
+OpenRISC---:samp:`{config/or1k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``M``
+  Signed 16-bit constant shifted left 16 bits. (Used with ``l.movhi``)
+
+``O``
+  Zero
+
+.. only:: gccint
+
+  ``c``
+    Register usable for sibcalls.
+
+PDP-11---:samp:`{config/pdp11/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Floating point registers AC0 through AC3.  These can be loaded from/to
+  memory with a single instruction.
+
+``d``
+  Odd numbered general registers (R1, R3, R5).  These are used for
+  16-bit multiply operations.
+
+``D``
+  A memory reference that is encoded within the opcode, but not
+  auto-increment or auto-decrement.
+
+``f``
+  Any of the floating point registers (AC0 through AC5).
+
+``G``
+  Floating point constant 0.
+
+``h``
+  Floating point registers AC4 and AC5.  These cannot be loaded from/to
+  memory with a single instruction.
+
+``I``
+  An integer constant that fits in 16 bits.
+
+``J``
+  An integer constant whose low order 16 bits are zero.
+
+``K``
+  An integer constant that does not meet the constraints for codes
+  :samp:`I` or :samp:`J`.
+
+``L``
+  The integer constant 1.
+
+``M``
+  The integer constant -1.
+
+``N``
+  The integer constant 0.
+
+``O``
+  Integer constants 0 through 3; shifts by these
+  amounts are handled as multiple single-bit shifts rather than a single
+  variable-length shift.
+
+``Q``
+  A memory reference which requires an additional word (address or
+  offset) after the opcode.
+
+``R``
+  A memory reference that is encoded within the opcode.
+
+PowerPC and IBM RS6000---:samp:`{config/rs6000/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``r``
+  A general purpose register (GPR), ``r0``... ``r31``.
+
+``b``
+  A base register.  Like ``r``, but ``r0`` is not allowed, so
+  ``r1``... ``r31``.
+
+``f``
+  A floating point register (FPR), ``f0``... ``f31``.
+
+``d``
+  A floating point register.  This is the same as ``f`` nowadays;
+  historically ``f`` was for single-precision and ``d`` was for
+  double-precision floating point.
+
+``v``
+  An Altivec vector register (VR), ``v0``... ``v31``.
+
+``wa``
+  A VSX register (VSR), ``vs0``... ``vs63``.  This is either an
+  FPR (``vs0``... ``vs31`` are ``f0``... ``f31``) or a VR
+  (``vs32``... ``vs63`` are ``v0``... ``v31``).
+
+  When using ``wa``, you should use the ``%x`` output modifier, so that
+  the correct register number is printed.  For example:
+
+  .. code-block:: c++
+
+    asm ("xvadddp %x0,%x1,%x2"
+         : "=wa" (v1)
+         : "wa" (v2), "wa" (v3));
+
+  You should not use ``%x`` for ``v`` operands:
+
+  .. code-block:: c++
+
+    asm ("xsaddqp %0,%1,%2"
+         : "=v" (v1)
+         : "v" (v2), "v" (v3));
+
+.. only:: gccint
+
+  ``h``
+    A special register (``vrsave``, ``ctr``, or ``lr``).
+
+``c``
+  The count register, ``ctr``.
+
+``l``
+  The link register, ``lr``.
+
+``x``
+  Condition register field 0, ``cr0``.
+
+``y``
+  Any condition register field, ``cr0``... ``cr7``.
+
+.. only:: gccint
+
+  ``z``
+    The carry bit, ``XER[CA]``.
+
+  ``we``
+    Like ``wa``, if :option:`-mpower9-vector` and :option:`-m64` are used;
+    otherwise, ``NO_REGS``.
+
+  ``wn``
+    No register (``NO_REGS``).
+
+  ``wr``
+    Like ``r``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wx``
+    Like ``d``, if :option:`-mpowerpc-gfxopt` is used; otherwise, ``NO_REGS``.
+
+  ``wA``
+    Like ``b``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wB``
+    Signed 5-bit constant integer that can be loaded into an Altivec register.
+
+  ``wE``
+    Vector constant that can be loaded with the XXSPLTIB instruction.
+
+  ``wF``
+    Memory operand suitable for power8 GPR load fusion.
+
+  ``wL``
+    Int constant that is the element number mfvsrld accesses in a vector.
+
+  ``wM``
+    Match vector constant with all 1's if the XXLORC instruction is available.
+
+  ``wO``
+    Memory operand suitable for the ISA 3.0 vector d-form instructions.
+
+  ``wQ``
+    Memory operand suitable for the load/store quad instructions.
+
+  ``wS``
+    Vector constant that can be loaded with XXSPLTIB & sign extension.
+
+  ``wY``
+    A memory operand for a DS-form instruction.
+
+  ``wZ``
+    An indexed or indirect memory operand, ignoring the bottom 4 bits.
+
+``I``
+  A signed 16-bit constant.
+
+``J``
+  An unsigned 16-bit constant shifted left 16 bits (use ``L`` instead
+  for ``SImode`` constants).
+
+``K``
+  An unsigned 16-bit constant.
+
+``L``
+  A signed 16-bit constant shifted left 16 bits.
+
+.. only:: gccint
+
+  ``M``
+    An integer constant greater than 31.
+
+  ``N``
+    An exact power of 2.
+
+  ``O``
+    The integer constant zero.
+
+  ``P``
+    A constant whose negation is a signed 16-bit constant.
+
+``eI``
+  A signed 34-bit integer constant if prefixed instructions are supported.
+
+``eQ``
+  An IEEE 128-bit constant that can be loaded into a VSX register with
+  the ``lxvkq`` instruction.
+
+.. only:: gccint
+
+  ``G``
+    A floating point constant that can be loaded into a register with one
+    instruction per word.
+
+  ``H``
+    A floating point constant that can be loaded into a register using
+    three instructions.
+
+``m``
+  A memory operand.
+  Normally, ``m`` does not allow addresses that update the base register.
+  If the ``<`` or ``>`` constraint is also used, they are allowed and
+  therefore on PowerPC targets in that case it is only safe
+  to use ``m<>`` in an ``asm`` statement if that ``asm`` statement
+  accesses the operand exactly once.  The ``asm`` statement must also
+  use ``%U<opno>`` as a placeholder for the 'update' flag in the
+  corresponding load or store instruction.  For example:
+
+  .. code-block:: c++
+
+    asm ("st%U0 %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is correct but:
+
+  .. code-block:: c++
+
+    asm ("st %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is not.
+
+.. only:: gccint
+
+  ``es``
+    A 'stable' memory operand; that is, one which does not include any
+    automodification of the base register.  This used to be useful when
+    ``m`` allowed automodification of the base register, but as those
+    are now only allowed when ``<`` or ``>`` is used, ``es`` is
+    basically the same as ``m`` without ``<`` and ``>``.
+
+``Q``
+  A memory operand addressed by just a base register.
+
+.. only:: gccint
+
+  ``Y``
+    A memory operand for a DQ-form instruction.
+
+``Z``
+  A memory operand accessed with indexed or indirect addressing.
+
+.. only:: gccint
+
+  ``R``
+    An AIX TOC entry.
+
+``a``
+  An indexed or indirect address.
+
+.. only:: gccint
+
+  ``U``
+    A V.4 small data reference.
+
+  ``W``
+    A vector constant that does not require memory.
+
+  ``j``
+    The zero vector constant.
+
+PRU---:samp:`{config/pru/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  An unsigned 8-bit integer constant.
+
+``J``
+  An unsigned 16-bit integer constant.
+
+``L``
+  An unsigned 5-bit integer constant (for shift counts).
+
+``T``
+  A text segment (program memory) constant label.
+
+``Z``
+  Integer constant zero.
+
+RL78---:samp:`{config/rl78/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Int3``
+  An integer constant in the range 1 ... 7.
+
+``Int8``
+  An integer constant in the range 0 ... 255.
+
+``J``
+  An integer constant in the range -255 ... 0
+
+``K``
+  The integer constant 1.
+
+``L``
+  The integer constant -1.
+
+``M``
+  The integer constant 0.
+
+``N``
+  The integer constant 2.
+
+``O``
+  The integer constant -2.
+
+``P``
+  An integer constant in the range 1 ... 15.
+
+``Qbi``
+  The built-in compare types--eq, ne, gtu, ltu, geu, and leu.
+
+``Qsc``
+  The synthetic compare types--gt, lt, ge, and le.
+
+``Wab``
+  A memory reference with an absolute address.
+
+``Wbc``
+  A memory reference using ``BC`` as a base register, with an optional offset.
+
+``Wca``
+  A memory reference using ``AX``, ``BC``, ``DE``, or ``HL`` for the address, for calls.
+
+``Wcv``
+  A memory reference using any 16-bit register pair for the address, for calls.
+
+``Wd2``
+  A memory reference using ``DE`` as a base register, with an optional offset.
+
+``Wde``
+  A memory reference using ``DE`` as a base register, without any offset.
+
+``Wfr``
+  Any memory reference to an address in the far address space.
+
+``Wh1``
+  A memory reference using ``HL`` as a base register, with an optional one-byte offset.
+
+``Whb``
+  A memory reference using ``HL`` as a base register, with ``B`` or ``C`` as the index register.
+
+``Whl``
+  A memory reference using ``HL`` as a base register, without any offset.
+
+``Ws1``
+  A memory reference using ``SP`` as a base register, with an optional one-byte offset.
+
+``Y``
+  Any memory reference to an address in the near address space.
+
+``A``
+  The ``AX`` register.
+
+``B``
+  The ``BC`` register.
+
+``D``
+  The ``DE`` register.
+
+``R``
+  ``A`` through ``L`` registers.
+
+``S``
+  The ``SP`` register.
+
+``T``
+  The ``HL`` register.
+
+``Z08W``
+  The 16-bit ``R8`` register.
+
+``Z10W``
+  The 16-bit ``R10`` register.
+
+``Zint``
+  The registers reserved for interrupts (``R24`` to ``R31``).
+
+``a``
+  The ``A`` register.
+
+``b``
+  The ``B`` register.
+
+``c``
+  The ``C`` register.
+
+``d``
+  The ``D`` register.
+
+``e``
+  The ``E`` register.
+
+``h``
+  The ``H`` register.
+
+``l``
+  The ``L`` register.
+
+``v``
+  The virtual registers.
+
+``w``
+  The ``PSW`` register.
+
+``x``
+  The ``X`` register.
+
+RISC-V---:samp:`{config/riscv/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``I``
+  An I-type 12-bit signed immediate.
+
+``J``
+  Integer zero.
+
+``K``
+  A 5-bit unsigned immediate for CSR access instructions.
+
+``A``
+  An address that is held in a general-purpose register.
+
+``S``
+  A constraint that matches an absolute symbolic address.
+
+RX---:samp:`{config/rx/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Q``
+  An address which does not involve register indirect addressing or
+  pre/post increment/decrement addressing.
+
+``Symbol``
+  A symbol reference.
+
+``Int08``
+  A constant in the range -256 to 255, inclusive.
+
+``Sint08``
+  A constant in the range -128 to 127, inclusive.
+
+``Sint16``
+  A constant in the range -32768 to 32767, inclusive.
+
+``Sint24``
+  A constant in the range -8388608 to 8388607, inclusive.
+
+``Uint04``
+  A constant in the range 0 to 15, inclusive.
+
+S/390 and zSeries---:samp:`{config/s390/s390.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register (general purpose register except r0)
+
+``c``
+  Condition code register
+
+``d``
+  Data register (arbitrary general purpose register)
+
+``f``
+  Floating-point register
+
+``I``
+  Unsigned 8-bit constant (0--255)
+
+``J``
+  Unsigned 12-bit constant (0--4095)
+
+``K``
+  Signed 16-bit constant (-32768--32767)
+
+``L``
+  Value appropriate as displacement.
+
+  ``(0..4095)``
+    for short displacement
+
+  ``(-524288..524287)``
+    for long displacement
+
+``M``
+  Constant integer with a value of 0x7fffffff.
+
+``N``
+  Multiple letter constraint followed by 4 parameter letters.
+
+  ``0..9:``
+    number of the part counting from most to least significant
+
+  ``H,Q:``
+    mode of the part
+
+  ``D,S,H:``
+    mode of the containing operand
+
+  ``0,F:``
+    value of the other parts (F---all bits set)
+
+  The constraint matches if the specified part of a constant
+  has a value different from its other parts.
+
+``Q``
+  Memory reference without index register and with short displacement.
+
+``R``
+  Memory reference with index register and short displacement.
+
+``S``
+  Memory reference without index register but with long displacement.
+
+``T``
+  Memory reference with index register and long displacement.
+
+``U``
+  Pointer with short displacement.
+
+``W``
+  Pointer with long displacement.
+
+``Y``
+  Shift count operand.
+
+SPARC---:samp:`{config/sparc/sparc.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  Floating-point register on the SPARC-V8 architecture and
+  lower floating-point register on the SPARC-V9 architecture.
+
+``e``
+  Floating-point register.  It is equivalent to :samp:`f` on the
+  SPARC-V8 architecture and contains both lower and upper
+  floating-point registers on the SPARC-V9 architecture.
+
+``c``
+  Floating-point condition code register.
+
+``d``
+  Lower floating-point register.  It is only valid on the SPARC-V9
+  architecture when the Visual Instruction Set is available.
+
+``b``
+  Floating-point register.  It is only valid on the SPARC-V9 architecture
+  when the Visual Instruction Set is available.
+
+``h``
+  64-bit global or out register for the SPARC-V8+ architecture.
+
+``C``
+  The constant all-ones, for floating-point.
+
+``A``
+  Signed 5-bit constant
+
+``D``
+  A vector constant
+
+``I``
+  Signed 13-bit constant
+
+``J``
+  Zero
+
+``K``
+  32-bit constant with the low 12 bits clear (a constant that can be
+  loaded with the ``sethi`` instruction)
+
+``L``
+  A constant in the range supported by ``movcc`` instructions (11-bit
+  signed immediate)
+
+``M``
+  A constant in the range supported by ``movrcc`` instructions (10-bit
+  signed immediate)
+
+``N``
+  Same as :samp:`K`, except that it verifies that bits that are not in the
+  lower 32-bit range are all zero.  Must be used instead of :samp:`K` for
+  modes wider than ``SImode``
+
+``O``
+  The constant 4096
+
+``G``
+  Floating-point zero
+
+``H``
+  Signed 13-bit constant, sign-extended to 32 or 64 bits
+
+``P``
+  The constant -1
+
+``Q``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single sethi
+  instruction
+
+``R``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single mov
+  instruction
+
+``S``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a high/lo_sum
+  instruction sequence
+
+``T``
+  Memory address aligned to an 8-byte boundary
+
+``U``
+  Even register
+
+``W``
+  Memory address for :samp:`e` constraint registers
+
+``w``
+  Memory address with only a base register
+
+``Y``
+  Vector zero
+
+TI C6X family---:samp:`{config/c6x/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register file A (A0--A31).
+
+``b``
+  Register file B (B0--B31).
+
+``A``
+  Predicate registers in register file A (A0--A2 on C64X and
+  higher, A1 and A2 otherwise).
+
+``B``
+  Predicate registers in register file B (B0--B2).
+
+``C``
+  A call-used register in register file B (B0--B9, B16--B31).
+
+``Da``
+  Register file A, excluding predicate registers (A3--A31,
+  plus A0 if not C64X or higher).
+
+``Db``
+  Register file B, excluding predicate registers (B3--B31).
+
+``Iu4``
+  Integer constant in the range 0 ... 15.
+
+``Iu5``
+  Integer constant in the range 0 ... 31.
+
+``In5``
+  Integer constant in the range -31 ... 0.
+
+``Is5``
+  Integer constant in the range -16 ... 15.
+
+``I5x``
+  Integer constant that can be the operand of an ADDA or a SUBA insn.
+
+``IuB``
+  Integer constant in the range 0 ... 65535.
+
+``IsB``
+  Integer constant in the range -32768 ... 32767.
+
+``IsC``
+  Integer constant in the range -2^{20} ... 2^{20} - 1.
+
+``Jc``
+  Integer constant that is a valid mask for the clr instruction.
+
+``Js``
+  Integer constant that is a valid mask for the set instruction.
+
+``Q``
+  Memory location with A base register.
+
+``R``
+  Memory location with B base register.
+
+.. only:: gccint
+
+  ``S0``
+    On C64x+ targets, a GP-relative small data reference.
+
+  ``S1``
+    Any kind of ``SYMBOL_REF``, for use in a call address.
+
+  ``Si``
+    Any kind of immediate operand, unless it matches the S0 constraint.
+
+  ``T``
+    Memory location with B base register, but not using a long offset.
+
+  ``W``
+    A memory operand with an address that cannot be used in an unaligned access.
+
+``Z``
+  Register B14 (aka DP).
+
+Visium---:samp:`{config/visium/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``b``
+  EAM register ``mdb``
+
+``c``
+  EAM register ``mdc``
+
+``f``
+  Floating point register
+
+.. only:: gccint
+
+  ``k``
+    Register for sibcall optimization
+
+``l``
+  General register, but not ``r29``, ``r30`` and ``r31``
+
+``t``
+  Register ``r1``
+
+``u``
+  Register ``r2``
+
+``v``
+  Register ``r3``
+
+``G``
+  Floating-point constant 0.0
+
+``J``
+  Integer constant in the range 0 .. 65535 (16-bit immediate)
+
+``K``
+  Integer constant in the range 1 .. 31 (5-bit immediate)
+
+``L``
+  Integer constant in the range -65535 .. -1 (16-bit negative immediate)
+
+``M``
+  Integer constant -1
+
+``O``
+  Integer constant 0
+
+``P``
+  Integer constant 32
+
+x86 family---:samp:`{config/i386/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R``
+  Legacy register---the eight integer registers available on all
+  i386 processors (``a``, ``b``, ``c``, ``d``,
+  ``si``, ``di``, ``bp``, ``sp``).
+
+``q``
+  Any register accessible as ``rl``.  In 32-bit mode, ``a``,
+  ``b``, ``c``, and ``d`` ; in 64-bit mode, any integer register.
+
+``Q``
+  Any register accessible as ``rh`` : ``a``, ``b``,
+  ``c``, and ``d``.
+
+.. only:: gccint
+
+  ``l``
+    Any register that can be used as the index in a base+index memory
+    access: that is, any general register except the stack pointer.
+
+``a``
+  The ``a`` register.
+
+``b``
+  The ``b`` register.
+
+``c``
+  The ``c`` register.
+
+``d``
+  The ``d`` register.
+
+``S``
+  The ``si`` register.
+
+``D``
+  The ``di`` register.
+
+``A``
+  The ``a`` and ``d`` registers.  This class is used for instructions
+  that return double word results in the ``ax:dx`` register pair.  Single
+  word values will be allocated either in ``ax`` or ``dx``.
+  For example on i386 the following implements ``rdtsc`` :
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned long long tick;
+      __asm__ __volatile__("rdtsc":"=A"(tick));
+      return tick;
+    }
+
+  This is not correct on x86-64 as it would allocate tick in either ``ax``
+  or ``dx``.  You have to use the following variant instead:
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned int tickl, tickh;
+      __asm__ __volatile__("rdtsc":"=a"(tickl),"=d"(tickh));
+      return ((unsigned long long)tickh << 32)|tickl;
+    }
+
+``U``
+  The call-clobbered integer registers.
+
+``f``
+  Any 80387 floating-point (stack) register.
+
+``t``
+  Top of 80387 floating-point stack (``%st(0)``).
+
+``u``
+  Second from top of 80387 floating-point stack (``%st(1)``).
+
+.. only:: gccint
+
+  ``Yk``
+    Any mask register that can be used as a predicate, i.e. ``k1-k7``.
+
+  ``k``
+    Any mask register.
+
+``y``
+  Any MMX register.
+
+``x``
+  Any SSE register.
+
+``v``
+  Any EVEX encodable SSE register (``%xmm0-%xmm31``).
+
+.. only:: gccint
+
+  ``w``
+    Any bound register.
+
+``Yz``
+  First SSE register (``%xmm0``).
+
+.. only:: gccint
+
+  ``Yi``
+    Any SSE register, when SSE2 and inter-unit moves are enabled.
+
+  ``Yj``
+    Any SSE register, when SSE2 and inter-unit moves from vector registers are enabled.
+
+  ``Ym``
+    Any MMX register, when inter-unit moves are enabled.
+
+  ``Yn``
+    Any MMX register, when inter-unit moves from vector registers are enabled.
+
+  ``Yp``
+    Any integer register when ``TARGET_PARTIAL_REG_STALL`` is disabled.
+
+  ``Ya``
+    Any integer register when zero extensions with ``AND`` are disabled.
+
+  ``Yb``
+    Any register that can be used as the GOT base when calling
+
+    ``___tls_get_addr`` : that is, any general register except ``a``
+    and ``sp`` registers, for :option:`-fno-plt` if linker supports it.
+    Otherwise, ``b`` register.
+
+  ``Yf``
+    Any x87 register when 80387 floating-point arithmetic is enabled.
+
+  ``Yr``
+    Lower SSE register when avoiding REX prefix and all SSE registers otherwise.
+
+  ``Yv``
+    For AVX512VL, any EVEX-encodable SSE register (``%xmm0-%xmm31``),
+    otherwise any SSE register.
+
+  ``Yh``
+    Any EVEX-encodable SSE register, that has number factor of four.
+
+  ``Bf``
+    Flags register operand.
+
+  ``Bg``
+    GOT memory operand.
+
+  ``Bm``
+    Vector memory operand.
+
+  ``Bc``
+    Constant memory operand.
+
+``Bn``
+  Memory operand without REX prefix.
+
+``Bs``
+  Sibcall memory operand.
+
+``Bw``
+  Call memory operand.
+
+``Bz``
+  Constant call address operand.
+
+``BC``
+  SSE constant -1 operand.
+
+``I``
+  Integer constant in the range 0 ... 31, for 32-bit shifts.
+
+``J``
+  Integer constant in the range 0 ... 63, for 64-bit shifts.
+
+``K``
+  Signed 8-bit integer constant.
+
+``L``
+  ``0xFF`` or ``0xFFFF``, for andsi as a zero-extending move.
+
+``M``
+  0, 1, 2, or 3 (shifts for the ``lea`` instruction).
+
+``N``
+  Unsigned 8-bit integer constant (for ``in`` and ``out``
+  instructions).
+
+.. only:: gccint
+
+  ``O``
+    Integer constant in the range 0 ... 127, for 128-bit shifts.
+
+``G``
+  Standard 80387 floating point constant.
+
+``C``
+  SSE constant zero operand.
+
+``e``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in sign-extending x86-64
+  instructions).
+
+``We``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for sign-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wz``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for zero-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wd``
+  128-bit integer constant where both the high and low 64-bit word
+  satisfy the ``e`` constraint.
+
+``Z``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in zero-extending x86-64
+  instructions).
+
+``Tv``
+  VSIB address operand.
+
+``Ts``
+  Address operand without segment register.
+
+Xstormy16---:samp:`{config/stormy16/stormy16.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register r0.
+
+``b``
+  Register r1.
+
+``c``
+  Register r2.
+
+``d``
+  Register r8.
+
+``e``
+  Registers r0 through r7.
+
+``t``
+  Registers r0 and r1.
+
+``y``
+  The carry register.
+
+``z``
+  Registers r8 and r9.
+
+``I``
+  A constant between 0 and 3 inclusive.
+
+``J``
+  A constant that has exactly one bit set.
+
+``K``
+  A constant that has exactly one bit clear.
+
+``L``
+  A constant between 0 and 255 inclusive.
+
+``M``
+  A constant between -255 and 0 inclusive.
+
+``N``
+  A constant between -3 and 0 inclusive.
+
+``O``
+  A constant between 1 and 4 inclusive.
+
+``P``
+  A constant between -4 and -1 inclusive.
+
+``Q``
+  A memory reference that is a stack push.
+
+``R``
+  A memory reference that is a stack pop.
+
+``S``
+  A memory reference that refers to a constant address of known value.
+
+``T``
+  The register indicated by Rx (not implemented yet).
+
+``U``
+  A constant that is not between 2 and 15 inclusive.
+
+``Z``
+  The constant 0.
+
+Xtensa---:samp:`{config/xtensa/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General-purpose 32-bit register
+
+``b``
+  One-bit boolean register
+
+``A``
+  MAC16 40-bit accumulator register
+
+``I``
+  Signed 12-bit integer constant, for use in MOVI instructions
+
+``J``
+  Signed 8-bit integer constant, for use in ADDI instructions
+
+``K``
+  Integer constant valid for BccI instructions
+
+``L``
+  Unsigned constant valid for BccUI instructions
\ No newline at end of file
diff --git a/gcc/d/doc/conf.py b/gcc/d/doc/conf.py
new file mode 100644
index 00000000000..c33f28a2f7f
--- /dev/null
+++ b/gcc/d/doc/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'gdc'
+project = 'The GNU D Compiler'
+copyright = '2006-2022 Free Software Foundation, Inc.'
+authors = 'David Friedman, Iain Buclaw'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invoking-gdc', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/d/doc/copyright.rst b/gcc/d/doc/copyright.rst
new file mode 100644
index 00000000000..5afce611a7a
--- /dev/null
+++ b/gcc/d/doc/copyright.rst
@@ -0,0 +1,13 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is in the :ref:`gnu_fdl`.
\ No newline at end of file
diff --git a/gcc/d/doc/general-public-license-3.rst b/gcc/d/doc/general-public-license-3.rst
new file mode 100644
index 00000000000..becda773ca0
--- /dev/null
+++ b/gcc/d/doc/general-public-license-3.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gpl-3.0.rst
\ No newline at end of file
diff --git a/gcc/d/doc/gnu-free-documentation-license.rst b/gcc/d/doc/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/d/doc/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/d/doc/index.rst b/gcc/d/doc/index.rst
new file mode 100644
index 00000000000..700a4a8d885
--- /dev/null
+++ b/gcc/d/doc/index.rst
@@ -0,0 +1,22 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The GNU D Compiler
+==================
+
+This manual describes how to use :command:`gdc`, the GNU compiler for
+the D programming language.  This manual is specifically about
+:command:`gdc`.  For more information about the D programming
+language in general, including language specifications and standard
+package documentation, see https://dlang.org/.
+
+.. toctree::
+
+  copyright
+  invoking-gdc
+  general-public-license-3
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/d/doc/indices-and-tables.rst b/gcc/d/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/d/doc/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc.rst b/gcc/d/doc/invoking-gdc.rst
new file mode 100644
index 00000000000..be477b82f07
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc.rst
@@ -0,0 +1,48 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _invoking-gdc:
+
+Invoking gdc
+------------
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  gdc [ :option:`-c` | :option:`-S` ] [ :option:`-g` ] [ :option:`-pg` ]
+      [ :option:`-O`:samp:`{level}` ] [ :option:`-W`:samp:`{warn}`...]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-L`:samp:`{dir}`...]
+      [ :option:`-f`:samp:`{option}`...] [ :option:`-m`:samp:`{machine-option}`...]
+      [ :option:`-o` :samp:`{outfile}` ] [@ :samp:`{file}` ] :samp:`{infile}`...
+
+  Only the most useful options are listed here; see below for the
+  remainder.
+
+Description
+^^^^^^^^^^^
+
+The :command:`gdc` command is the GNU compiler for the D language and
+supports many of the same options as :command:`gcc`.  See :ref:`gcc:option-summary`.
+This manual only documents the options specific to :command:`gdc`.
+
+Options
+^^^^^^^
+
+.. toctree::
+  :maxdepth: 2
+
+  invoking-gdc/input-and-output-files
+  invoking-gdc/runtime-options
+  invoking-gdc/options-for-directory-search
+  invoking-gdc/code-generation
+  invoking-gdc/warnings
+  invoking-gdc/options-for-linking
+  invoking-gdc/developer-options
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/code-generation.rst b/gcc/d/doc/invoking-gdc/code-generation.rst
new file mode 100644
index 00000000000..178b6f98fe2
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/code-generation.rst
@@ -0,0 +1,170 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, code generation
+
+.. _code-generation:
+
+Code Generation
+***************
+
+In addition to the many :command:`gcc` options controlling code generation,
+:command:`gdc` has several options specific to itself.
+
+.. option:: -H
+
+  .. index:: -H
+
+  Generates D interface files for all modules being compiled.  The compiler
+  determines the output file based on the name of the input file, removes
+  any directory components and suffix, and applies the :samp:`.di` suffix.
+
+.. option:: -Hd dir
+
+  .. index:: -Hd
+
+  Same as :option:`-H`, but writes interface files to directory :samp:`{dir}`.
+  This option can be used with :option:`-Hf file` to independently set the
+  output file and directory path.
+
+.. option:: -Hf file
+
+  .. index:: -Hf
+
+  Same as :option:`-H` but writes interface files to :samp:`{file}`.  This option can
+  be used with :option:`-Hd dir` to independently set the output file and
+  directory path.
+
+.. option:: -M
+
+  .. index:: -M
+
+  Output the module dependencies of all source files being compiled in a
+  format suitable for :command:`make`.  The compiler outputs one
+  :command:`make` rule containing the object file name for that source file,
+  a colon, and the names of all imported files.
+
+.. option:: -MM
+
+  .. index:: -MM
+
+  Like :option:`-M` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -MF file
+
+  .. index:: -MF
+
+  When used with :option:`-M` or :option:`-MM`, specifies a :samp:`{file}` to write
+  the dependencies to.  When used with the driver options :option:`-MD` or
+  :option:`-MMD`, :option:`-MF` overrides the default dependency output file.
+
+.. option:: -MG
+
+  .. index:: -MG
+
+  This option is for compatibility with :command:`gcc`, and is ignored by the
+  compiler.
+
+.. option:: -MP
+
+  .. index:: -MP
+
+  Outputs a phony target for each dependency other than the modules being
+  compiled, causing each to depend on nothing.
+
+.. option:: -MT target
+
+  .. index:: -MT
+
+  Change the :samp:`{target}` of the rule emitted by dependency generation
+  to be exactly the string you specify.  If you want multiple targets,
+  you can specify them as a single argument to :option:`-MT`, or use
+  multiple :option:`-MT` options.
+
+.. option:: -MQ target
+
+  .. index:: -MQ
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  :command:`make`.
+
+.. option:: -MD
+
+  .. index:: -MD
+
+  This option is equivalent to :option:`-M -MF file`.  The driver
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.deps` suffix.
+
+.. option:: -MMD
+
+  .. index:: -MMD
+
+  Like :option:`-MD` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -X
+
+  .. index:: -X
+
+  Output information describing the contents of all source files being
+  compiled in JSON format to a file.  The driver determines :samp:`{file}` by
+  removing any directory components and suffix from the input file, and then
+  adding a :samp:`.json` suffix.
+
+.. option:: -Xf file
+
+  .. index:: -Xf
+
+  Same as :option:`-X`, but writes all JSON contents to the specified
+  :samp:`{file}`.
+
+.. option:: -fdoc
+
+  .. index:: -fdoc
+
+  Generates ``Ddoc`` documentation and writes it to a file.  The compiler
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.html` suffix.
+
+.. option:: -fdoc-dir=dir
+
+  .. index:: -fdoc-dir
+
+  Same as :option:`-fdoc`, but writes documentation to directory :samp:`{dir}`.
+  This option can be used with :option:`-fdoc-file=file` to
+  independently set the output file and directory path.
+
+.. option:: -fdoc-file=file
+
+  .. index:: -fdoc-file
+
+  Same as :option:`-fdoc`, but writes documentation to :samp:`{file}`.  This
+  option can be used with :option:`-fdoc-dir=dir` to independently
+  set the output file and directory path.
+
+.. option:: -fdoc-inc=file
+
+  .. index:: -fdoc-inc
+
+  Specify :samp:`{file}` as a :samp:`{Ddoc}` macro file to be read.  Multiple
+  :option:`-fdoc-inc` options can be used, and files are read and processed
+  in the same order.
+
+.. option::  -fdump-c++-spec={file}
+
+  For D source files, generate corresponding C++ declarations in :samp:`{file}`.
+
+.. option:: -fdump-c++-spec-verbose
+
+  In conjunction with :option:`-fdump-c++-spec=` above, add comments for ignored
+  declarations in the generated C++ header.
+
+.. option:: -fsave-mixins={file}
+
+  Generates code expanded from D ``mixin`` statements and writes the
+  processed sources to :samp:`{file}`.  This is useful to debug errors in compilation
+  and provides source for debuggers to show when requested.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/developer-options.rst b/gcc/d/doc/invoking-gdc/developer-options.rst
new file mode 100644
index 00000000000..564ed36d6c0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/developer-options.rst
@@ -0,0 +1,31 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: developer options, debug dump options, dump options
+
+.. _developer-options:
+
+Developer Options
+*****************
+
+This section describes command-line options that are primarily of
+interest to developers or language tooling.
+
+.. option:: -fdump-d-original
+
+  .. index:: -fdump-d-original
+
+  Output the internal front-end AST after the ``semantic3`` stage.
+  This option is only useful for debugging the GNU D compiler itself.
+
+.. option:: -v
+
+  .. index:: -v
+
+  Dump information about the compiler language processing stages as the source
+  program is being compiled.  This includes listing all modules that are
+  processed through the ``parse``, ``semantic``, ``semantic2``, and
+  ``semantic3`` stages; all ``import`` modules and their file paths;
+  and all ``function`` bodies that are being compiled.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/input-and-output-files.rst b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
new file mode 100644
index 00000000000..a4bce6b9aba
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
@@ -0,0 +1,45 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: suffixes for D source, D source file suffixes
+
+.. _input-and-output-files:
+
+Input and Output files
+**********************
+
+For any given input file, the file name suffix determines what kind of
+compilation is done.  The following kinds of input file names are supported:
+
+:samp:`{file}.d`
+  D source files.
+
+:samp:`{file}.dd`
+  Ddoc source files.
+
+:samp:`{file}.di`
+  D interface files.
+
+You can specify more than one input file on the :command:`gdc` command line,
+each being compiled separately in the compilation process.  If you specify a
+``-o file`` option, all the input files are compiled together,
+producing a single output file, named :samp:`{file}`.  This is allowed even
+when using ``-S`` or ``-c``.
+
+.. index:: D interface files.
+
+A D interface file contains only what an import of the module needs,
+rather than the whole implementation of that module.  They can be created
+by :command:`gdc` from a D source file by using the ``-H`` option.
+When the compiler resolves an import declaration, it searches for matching
+:samp:`.di` files first, then for :samp:`.d`.
+
+.. index:: Ddoc source files.
+
+A Ddoc source file contains code in the D macro processor language.  It is
+primarily designed for use in producing user documentation from embedded
+comments, with a slight affinity towards HTML generation.  If a :samp:`.d`
+source file starts with the string ``Ddoc`` then it is treated as general
+purpose documentation, not as a D source file.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-directory-search.rst b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
new file mode 100644
index 00000000000..934b22df5b0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
@@ -0,0 +1,92 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: directory options, options, directory search, search path
+
+.. _directory-options:
+
+Options for Directory Search
+****************************
+
+These options specify directories to search for files, libraries, and
+other parts of the compiler:
+
+.. option:: -Idir
+
+  .. index:: -I
+
+  Specify a directory to use when searching for imported modules at
+  compile time.  Multiple :option:`-I` options can be used, and the
+  paths are searched in the same order.
+
+.. option:: -Jdir
+
+  .. index:: -J
+
+  Specify a directory to use when searching for files in string imports
+  at compile time.  This switch is required in order to use
+  ``import(file)`` expressions.  Multiple :option:`-J` options can be
+  used, and the paths are searched in the same order.
+
+.. option:: -Ldir
+
+  .. index:: -L
+
+  When linking, specify a library search directory, as with :command:`gcc`.
+
+.. option:: -Bdir
+
+  .. index:: -B
+
+  This option specifies where to find the executables, libraries,
+  source files, and data files of the compiler itself, as with :command:`gcc`.
+
+.. option:: -fmodule-file=module=spec
+
+  .. index:: -fmodule-file
+
+  This option manipulates file paths of imported modules, such that if an
+  imported module matches all or the leftmost part of :samp:`{module}`, the file
+  path in :samp:`{spec}` is used as the location to search for D sources.
+  This is used when the source file path and names are not the same as the
+  package and module hierarchy.  Consider the following examples:
+
+  .. code-block:: c++
+
+    gdc test.d -fmodule-file=A.B=foo.d -fmodule-file=C=bar
+
+  This will tell the compiler to search in all import paths for the source
+  file :samp:`{foo.d}` when importing :samp:`{A.B}`, and the directory :samp:`{bar/}`
+  when importing :samp:`{C}`, as annotated in the following D code:
+
+  .. code-block:: c++
+
+    module test;
+    import A.B;     // Matches A.B, searches for foo.d
+    import C.D.E;   // Matches C, searches for bar/D/E.d
+    import A.B.C;   // No match, searches for A/B/C.d
+
+.. option:: -imultilib dir
+
+  .. index:: -imultilib
+
+  Use :samp:`{dir}` as a subdirectory of the gcc directory containing
+  target-specific D sources and interfaces.
+
+.. option:: -iprefix prefix
+
+  .. index:: -iprefix
+
+  Specify :samp:`{prefix}` as the prefix for the gcc directory containing
+  target-specific D sources and interfaces.  If the :samp:`{prefix}` represents
+  a directory, you should include the final ``'/'``.
+
+.. option:: -nostdinc
+
+  .. index:: -nostdinc
+
+  Do not search the standard system directories for D source and interface
+  files.  Only the directories that have been specified with :option:`-I` options
+  (and the directory of the current file, if appropriate) are searched.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-linking.rst b/gcc/d/doc/invoking-gdc/options-for-linking.rst
new file mode 100644
index 00000000000..dc64fcd206a
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-linking.rst
@@ -0,0 +1,59 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, linking, linking, static
+
+.. _linking:
+
+Options for Linking
+*******************
+
+These options come into play when the compiler links object files into an
+executable output file.  They are meaningless if the compiler is not doing
+a link step.
+
+.. option:: -defaultlib=libname
+
+  .. index:: -defaultlib=
+
+  Specify the library to use instead of libphobos when linking.  Options
+  specifying the linkage of libphobos, such as :option:`-static-libphobos`
+  or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -debuglib=libname
+
+  .. index:: -debuglib=
+
+  Specify the debug library to use instead of libphobos when linking.
+  This option has no effect unless the :option:`-g` option was also given
+  on the command line.  Options specifying the linkage of libphobos, such
+  as :option:`-static-libphobos` or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -nophoboslib
+
+  .. index:: -nophoboslib
+
+  Do not use the Phobos or D runtime library when linking.  Options specifying
+  the linkage of libphobos, such as :option:`-static-libphobos` or
+  :option:`-shared-libphobos`, are ignored.  The standard system libraries are
+  used normally, unless :option:`-nostdlib` or :option:`-nodefaultlibs` is used.
+
+.. option:: -shared-libphobos
+
+  .. index:: -shared-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the shared
+  version.  If no shared version was built when the compiler was configured,
+  this option has no effect.
+
+.. option:: -static-libphobos
+
+  .. index:: -static-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the static
+  version.  If no static version was built when the compiler was configured,
+  this option has no effect.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/runtime-options.rst b/gcc/d/doc/invoking-gdc/runtime-options.rst
new file mode 100644
index 00000000000..fda87c2b96e
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/runtime-options.rst
@@ -0,0 +1,314 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, runtime
+
+.. _runtime-options:
+
+Runtime Options
+***************
+
+These options affect the runtime behavior of programs compiled with
+:command:`gdc`.
+
+.. option:: -fall-instantiations
+
+  .. index:: -fall-instantiations, -fno-all-instantiations
+
+  Generate code for all template instantiations.  The default template emission
+  strategy is to not generate code for declarations that were either
+  instantiated speculatively, such as from ``__traits(compiles, ...)``, or
+  that come from an imported module not being compiled.
+
+.. option:: -fno-assert
+
+  .. index:: -fassert, -fno-assert
+
+  Turn off code generation for ``assert`` contracts.
+
+.. option:: -fno-bounds-check
+
+  .. index:: -fbounds-check, -fno-bounds-check
+
+  Turns off array bounds checking for all functions, which can improve
+  performance for code that uses arrays extensively.  Note that this
+  can result in unpredictable behavior if the code in question actually
+  does violate array bounds constraints.  It is safe to use this option
+  if you are sure that your code never throws a ``RangeError``.
+
+.. option:: -fbounds-check=value
+
+  .. index:: -fbounds-check=
+
+  An alternative to :option:`-fbounds-check` that allows more control
+  as to where bounds checking is turned on or off.  The following values
+  are supported:
+
+  :samp:`on`
+    Turns on array bounds checking for all functions.
+
+  :samp:`safeonly`
+    Turns on array bounds checking only for ``@safe`` functions.
+
+  :samp:`off`
+    Turns off array bounds checking completely.
+
+.. option:: -fno-builtin
+
+  .. index:: -fbuiltin, -fno-builtin
+
+  Don't recognize built-in functions unless they begin with the prefix
+  :samp:`__builtin_`.  By default, the compiler will recognize when a
+  function in the ``core.stdc`` package is a built-in function.
+
+.. option:: -fcheckaction
+
+  This option controls what code is generated on an assertion, bounds check, or
+  final switch failure.  The following values are supported:
+
+  :samp:`context`
+    Throw an ``AssertError`` with extra context information.
+
+  :samp:`halt`
+    Halt the program execution.
+
+  :samp:`throw`
+    Throw an ``AssertError`` (the default).
+
+.. option:: -fdebug=value
+
+  .. index:: -fno-debug
+
+  Turn on compilation of conditional ``debug`` code into the program.
+  The :option:`-fdebug` option itself sets the debug level to ``1``,
+  while :option:`-fdebug=` enables ``debug`` code that are identified
+  by any of the following values:
+
+  :samp:`level`
+    Sets the debug level to :samp:`{level}`, any ``debug`` code <= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of any ``debug`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-druntime
+
+  .. index:: -fdruntime, -fno-druntime
+
+  Implements https://dlang.org/spec/betterc.html.  Assumes that
+  compilation targets an environment without a D runtime library.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -nophoboslib -fno-exceptions -fno-moduleinfo -fno-rtti
+
+.. option:: -fextern-std=standard
+
+  Sets the C++ name mangling compatibility to the version identified by
+  :samp:`{standard}`.  The following values are supported:
+
+  :samp:`c++98`, :samp:`c++03`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``199711``.
+
+  :samp:`c++11`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201103``.
+
+  :samp:`c++14`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201402``.
+
+  :samp:`c++17`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201703``.
+    This is the default.
+
+  :samp:`c++20`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``202002``.
+
+.. option:: -fno-invariants
+
+  .. index:: -finvariants, -fno-invariants
+
+  Turns off code generation for class ``invariant`` contracts.
+
+.. option:: -fmain
+
+  Generates a default ``main()`` function when compiling.  This is useful when
+  unittesting a library, as it enables running the unittests in a library without
+  having to manually define an entry-point function.  This option does nothing
+  when ``main`` is already defined in user code.
+
+.. option:: -fno-moduleinfo
+
+  Turns off generation of the ``ModuleInfo`` and related functions
+  that would become unreferenced without it, which may allow linking
+  to programs not written in D.  Functions that are not be generated
+  include module constructors and destructors (``static this`` and
+  ``static ~this``), ``unittest`` code, and ``DSO`` registry
+  functions for dynamically linked code.
+
+.. option:: -fonly=filename
+
+  .. index:: -fonly
+
+  Tells the compiler to parse and run semantic analysis on all modules
+  on the command line, but only generate code for the module specified
+  by :samp:`{filename}`.
+
+.. option:: -fno-postconditions
+
+  .. index:: -fpostconditions, -fno-postconditions
+
+  Turns off code generation for postcondition ``out`` contracts.
+
+.. option:: -fno-preconditions
+
+  .. index:: -fpreconditions, -fno-preconditions
+
+  Turns off code generation for precondition ``in`` contracts.
+
+.. option:: -fpreview=id
+
+  .. index:: -fpreview
+
+  Turns on an upcoming D language change identified by :samp:`{id}`.  The following
+  values are supported:
+
+  :samp:`all`
+    Turns on all upcoming D language features.
+
+  :samp:`dip1000`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1000.md
+    (Scoped pointers).
+
+  :samp:`dip1008`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1008.md
+    (Allow exceptions in ``@nogc`` code).
+
+  :samp:`dip1021`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/accepted/DIP1021.md
+    (Mutable function arguments).
+
+  :samp:`dip25`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns on generation for destructing fields of partially constructed objects.
+
+  :samp:`fieldwise`
+    Turns on generation of struct equality to use field-wise comparisons.
+
+  :samp:`fixaliasthis`
+    Implements new lookup rules that check the current scope for ``alias this``
+    before searching in upper scopes.
+
+  :samp:`fiximmutableconv`
+    Disallows unsound immutable conversions that were formerly incorrectly
+    permitted.
+
+  :samp:`in`
+    Implements ``in`` parameters to mean ``scope const [ref]`` and accepts
+    rvalues.
+
+  :samp:`inclusiveincontracts`
+    Implements ``in`` contracts of overridden methods to be a superset of parent
+    contract.
+
+  :samp:`intpromote`
+    Implements C-style integral promotion for unary ``+``, ``-`` and ``~``
+    expressions.
+
+  :samp:`nosharedaccess`
+    Turns off and disallows all access to shared memory objects.
+
+  :samp:`rvaluerefparam`
+    Implements rvalue arguments to ``ref`` parameters.
+
+  :samp:`systemvariables`
+    Disables access to variables marked ``@system`` from ``@safe`` code.
+
+.. option:: -frelease
+
+  .. index:: -fno-release
+
+  Turns on compiling in release mode, which means not emitting runtime
+  checks for contracts and asserts.  Array bounds checking is not done
+  for ``@system`` and ``@trusted`` functions, and assertion
+  failures are undefined behavior.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -fno-assert -fbounds-check=safe -fno-invariants \
+        -fno-postconditions -fno-preconditions -fno-switch-errors
+
+.. option:: -frevert=
+
+  .. index:: -frevert
+
+  Turns off a D language feature identified by :samp:`{id}`.  The following values
+  are supported:
+
+  :samp:`all`
+    Turns off all revertable D language features.
+
+  :samp:`dip25`
+    Reverts https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns off generation for destructing fields of partially constructed objects.
+
+  :samp:`markdown`
+    Turns off Markdown replacements in Ddoc comments.
+
+.. option:: -fno-rtti
+
+  .. index:: -frtti, -fno-rtti
+
+  Turns off generation of run-time type information for all user defined types.
+  Any code that uses features of the language that require access to this
+  information will result in an error.
+
+.. option:: -fno-switch-errors
+
+  .. index:: -fswitch-errors, -fno-switch-errors
+
+  This option controls what code is generated when no case is matched
+  in a ``final switch`` statement.  The default run time behavior
+  is to throw a ``SwitchError``.  Turning off :option:`-fswitch-errors`
+  means that instead the execution of the program is immediately halted.
+
+.. option:: -funittest
+
+  .. index:: -funittest, -fno-unittest
+
+  Turns on compilation of ``unittest`` code, and turns on the
+  ``version(unittest)`` identifier.  This implies :option:`-fassert`.
+
+.. option:: -fversion=value
+
+  .. index:: -fversion
+
+  Turns on compilation of conditional ``version`` code into the program
+  identified by any of the following values:
+
+  :samp:`level`
+    Sets the version level to :samp:`{level}`, any ``version`` code >= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of ``version`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-weak-templates
+
+  .. index:: -fweak-templates, -fno-weak-templates
+
+  Turns off emission of declarations that can be defined in multiple objects as
+  weak symbols.  The default is to emit all public symbols as weak, unless the
+  target lacks support for weak symbols.  Disabling this option means that common
+  symbols are instead put in COMDAT or become private.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/warnings.rst b/gcc/d/doc/invoking-gdc/warnings.rst
new file mode 100644
index 00000000000..c9ed52e7630
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/warnings.rst
@@ -0,0 +1,148 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options to control warnings, warning messages, messages, warning, suppressing warnings
+
+.. _warnings:
+
+Warnings
+********
+
+Warnings are diagnostic messages that report constructions that
+are not inherently erroneous but that are risky or suggest there
+is likely to be a bug in the program.  Unless :option:`-Werror` is
+specified, they do not prevent compilation of the program.
+
+.. option:: -Wall
+
+  .. index:: -Wall, -Wno-all
+
+  Turns on all warnings messages.  Warnings are not a defined part of
+  the D language, and all constructs for which this may generate a
+  warning message are valid code.
+
+.. option:: -Walloca
+
+  .. index:: -Walloca
+
+  This option warns on all uses of "alloca" in the source.
+
+.. option:: -Walloca-larger-than=n
+
+  .. index:: -Walloca-larger-than, -Wno-alloca-larger-than
+
+  Warn on unbounded uses of alloca, and on bounded uses of alloca
+  whose bound can be larger than :samp:`{n}` bytes.
+  :option:`-Wno-alloca-larger-than` disables
+  :option:`-Walloca-larger-than` warning and is equivalent to
+  :option:`-Walloca-larger-than=SIZE_MAX` or larger.
+
+.. option:: -Wcast-result
+
+  .. index:: -Wcast-result, -Wno-cast-result
+
+  Warn about casts that will produce a null or zero result.  Currently
+  this is only done for casting between an imaginary and non-imaginary
+  data type, or casting between a D and C++ class.
+
+.. option:: -Wno-deprecated
+
+  .. index:: -Wdeprecated, -Wno-deprecated
+
+  Do not warn about usage of deprecated features and symbols with
+  ``deprecated`` attributes.
+
+.. option:: -Werror
+
+  .. index:: -Werror, -Wno-error
+
+  Turns all warnings into errors.
+
+.. option:: -Wspeculative
+
+  .. index:: -Wspeculative, -Wno-speculative
+
+  List all error messages from speculative compiles, such as
+  ``__traits(compiles, ...)``.  This option does not report
+  messages as warnings, and these messages therefore never become
+  errors when the :option:`-Werror` option is also used.
+
+.. option:: -Wtemplates
+
+  .. index:: -Wtemplates, -Wno-templates
+
+  Warn when a template instantiation is encountered.  Some coding
+  rules disallow templates, and this may be used to enforce that rule.
+
+.. option:: -Wunknown-pragmas
+
+  .. index:: -Wunknown-pragmas, -Wno-unknown-pragmas
+
+  Warn when a ``pragma()`` is encountered that is not understood by
+  :command:`gdc`.  This differs from :option:`-fignore-unknown-pragmas`
+  where a pragma that is part of the D language, but not implemented by
+  the compiler, won't get reported.
+
+.. option:: -Wno-varargs
+
+  .. index:: Wvarargs, Wno-varargs
+
+  Do not warn upon questionable usage of the macros used to handle variable
+  arguments like ``va_start``.
+
+.. option:: -fignore-unknown-pragmas
+
+  .. index:: -fignore-unknown-pragmas, -fno-ignore-unknown-pragmas
+
+  Turns off errors for unsupported pragmas.
+
+.. option:: -fmax-errors=n
+
+  .. index:: -fmax-errors
+
+  Limits the maximum number of error messages to :samp:`{n}`, at which point
+  :command:`gdc` bails out rather than attempting to continue processing the
+  source code.  If :samp:`{n}` is 0 (the default), there is no limit on the
+  number of error messages produced.
+
+.. option:: -fsyntax-only
+
+  .. index:: -fsyntax-only, -fno-syntax-only
+
+  Check the code for syntax errors, but do not actually compile it.  This
+  can be used in conjunction with :option:`-fdoc` or :option:`-H` to generate
+  files for each module present on the command-line, but no other output
+  file.
+
+.. option:: -ftransition=id
+
+  .. index:: -ftransition
+
+  Report additional information about D language changes identified by
+  :samp:`{id}`.  The following values are supported:
+
+  :samp:`all`
+    List information on all D language transitions.
+
+  :samp:`complex`
+    List all usages of complex or imaginary types.
+
+  :samp:`field`
+    List all non-mutable fields which occupy an object instance.
+
+  :samp:`in`
+    List all usages of ``in`` on parameter.
+
+  :samp:`nogc`
+    List all hidden GC allocations.
+
+  :samp:`templates`
+    List statistics on template instantiations.
+
+  :samp:`tls`
+    List all variables going into thread local storage.
+
+  :samp:`vmarkdown`
+    List instances of Markdown replacements in Ddoc.
\ No newline at end of file
diff --git a/gcc/doc/cpp/character-sets.rst b/gcc/doc/cpp/character-sets.rst
new file mode 100644
index 00000000000..f4b6e05515c
--- /dev/null
+++ b/gcc/doc/cpp/character-sets.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _character-sets:
+
+Character sets
+**************
+
+Source code character set processing in C and related languages is
+rather complicated.  The C standard discusses two character sets, but
+there are really at least four.
+
+The files input to CPP might be in any character set at all.  CPP's
+very first action, before it even looks for line boundaries, is to
+convert the file into the character set it uses for internal
+processing.  That set is what the C standard calls the :dfn:`source`
+character set.  It must be isomorphic with ISO 10646, also known as
+Unicode.  CPP uses the UTF-8 encoding of Unicode.
+
+The character sets of the input files are specified using the
+:option:`-finput-charset=` option.
+
+All preprocessing work (the subject of the rest of this manual) is
+carried out in the source character set.  If you request textual
+output from the preprocessor with the :option:`-E` option, it will be
+in UTF-8.
+
+After preprocessing is complete, string and character constants are
+converted again, into the :dfn:`execution` character set.  This
+character set is under control of the user; the default is UTF-8,
+matching the source character set.  Wide string and character
+constants have their own character set, which is not called out
+specifically in the standard.  Again, it is under control of the user.
+The default is UTF-16 or UTF-32, whichever fits in the target's
+``wchar_t`` type, in the target machine's byte
+order [#f1]_.
+
+Octal and hexadecimal escape sequences do not undergo
+conversion; ``'\x12'`` has the value 0x12 regardless of the currently
+selected execution character set.  All other escapes are replaced by
+the character in the source character set that they represent, then
+converted to the execution character set, just like unescaped
+characters.
+
+In identifiers, characters outside the ASCII range can be specified
+with the :samp:`\\u` and :samp:`\\U` escapes or used directly in the input
+encoding.  If strict ISO C90 conformance is specified with an option
+such as :option:`-std=c90`, or :option:`-fno-extended-identifiers` is
+used, then those constructs are not permitted in identifiers.
+
+.. [#f1] UTF-16 does not meet the requirements of the C
+  standard for a wide character set, but the choice of 16-bit
+  ``wchar_t`` is enshrined in some system ABIs so we cannot fix
+  this.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-syntax.rst b/gcc/doc/cpp/conditional-syntax.rst
new file mode 100644
index 00000000000..1dec2ac6f4b
--- /dev/null
+++ b/gcc/doc/cpp/conditional-syntax.rst
@@ -0,0 +1,411 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #if
+
+.. _conditional-syntax:
+
+Conditional Syntax
+******************
+
+A conditional in the C preprocessor begins with a :dfn:`conditional
+directive`: :samp:`#if`, :samp:`#ifdef` or :samp:`#ifndef`.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: #ifdef, #endif
+
+.. _ifdef:
+
+Ifdef
+^^^^^
+
+The simplest sort of conditional is
+
+.. code-block:: c++
+
+  #ifdef MACRO
+
+  controlled text
+
+  #endif /* MACRO */
+
+.. index:: conditional group
+
+This block is called a :dfn:`conditional group`.  :samp:`{controlled text}`
+will be included in the output of the preprocessor if and only if
+:samp:`{MACRO}` is defined.  We say that the conditional :dfn:`succeeds` if
+:samp:`{MACRO}` is defined, :dfn:`fails` if it is not.
+
+The :samp:`{controlled text}` inside of a conditional can include
+preprocessing directives.  They are executed only if the conditional
+succeeds.  You can nest conditional groups inside other conditional
+groups, but they must be completely nested.  In other words,
+:samp:`#endif` always matches the nearest :samp:`#ifdef` (or
+:samp:`#ifndef`, or :samp:`#if`).  Also, you cannot start a conditional
+group in one file and end it in another.
+
+Even if a conditional fails, the :samp:`{controlled text}` inside it is
+still run through initial transformations and tokenization.  Therefore,
+it must all be lexically valid C.  Normally the only way this matters is
+that all comments and string literals inside a failing conditional group
+must still be properly ended.
+
+The comment following the :samp:`#endif` is not required, but it is a
+good practice if there is a lot of :samp:`{controlled text}`, because it
+helps people match the :samp:`#endif` to the corresponding :samp:`#ifdef`.
+Older programs sometimes put :samp:`{MACRO}` directly after the
+:samp:`#endif` without enclosing it in a comment.  This is invalid code
+according to the C standard.  CPP accepts it with a warning.  It
+never affects which :samp:`#ifndef` the :samp:`#endif` matches.
+
+.. index:: #ifndef
+
+Sometimes you wish to use some code if a macro is *not* defined.
+You can do this by writing :samp:`#ifndef` instead of :samp:`#ifdef`.
+One common use of :samp:`#ifndef` is to include code only the first
+time a header file is included.  See :ref:`once-only-headers`.
+
+Macro definitions can vary between compilations for several reasons.
+Here are some samples.
+
+* Some macros are predefined on each kind of machine
+  (see :ref:`system-specific-predefined-macros`).  This allows you to provide
+  code specially tuned for a particular machine.
+
+* System header files define more macros, associated with the features
+  they implement.  You can test these macros with conditionals to avoid
+  using a system feature on a machine where it is not implemented.
+
+* Macros can be defined or undefined with the :option:`-D` and :option:`-U`
+  command-line options when you compile the program.  You can arrange to
+  compile the same source file into two different programs by choosing a
+  macro name to specify which program you want, writing conditionals to
+  test whether or how this macro is defined, and then controlling the
+  state of the macro with command-line options, perhaps set in the
+  Makefile.  See :ref:`invocation`.
+
+* Your program might have a special header file (often called
+  :samp:`config.h`) that is adjusted when the program is compiled.  It can
+  define or not define macros depending on the features of the system and
+  the desired capabilities of the program.  The adjustment can be
+  automated by a tool such as :command:`autoconf`, or done by hand.
+
+.. _if:
+
+If
+^^
+
+The :samp:`#if` directive allows you to test the value of an arithmetic
+expression, rather than the mere existence of one macro.  Its syntax is
+
+.. code-block:: c++
+
+  #if expression
+
+  controlled text
+
+  #endif /* expression */
+
+:samp:`{expression}` is a C expression of integer type, subject to stringent
+restrictions.  It may contain
+
+* Integer constants.
+
+* Character constants, which are interpreted as they would be in normal
+  code.
+
+* Arithmetic operators for addition, subtraction, multiplication,
+  division, bitwise operations, shifts, comparisons, and logical
+  operations (``&&`` and ``||``).  The latter two obey the usual
+  short-circuiting rules of standard C.
+
+* Macros.  All macros in the expression are expanded before actual
+  computation of the expression's value begins.
+
+* Uses of the ``defined`` operator, which lets you check whether macros
+  are defined in the middle of an :samp:`#if`.
+
+* Identifiers that are not macros, which are all considered to be the
+  number zero.  This allows you to write ``#if MACRO`` instead of
+  ``#ifdef MACRO``, if you know that MACRO, when defined, will
+  always have a nonzero value.  Function-like macros used without their
+  function call parentheses are also treated as zero.
+
+  In some contexts this shortcut is undesirable.  The :option:`-Wundef`
+  option causes GCC to warn whenever it encounters an identifier which is
+  not a macro in an :samp:`#if`.
+
+The preprocessor does not know anything about types in the language.
+Therefore, ``sizeof`` operators are not recognized in :samp:`#if`, and
+neither are ``enum`` constants.  They will be taken as identifiers
+which are not macros, and replaced by zero.  In the case of
+``sizeof``, this is likely to cause the expression to be invalid.
+
+The preprocessor calculates the value of :samp:`{expression}`.  It carries
+out all calculations in the widest integer type known to the compiler;
+on most machines supported by GCC this is 64 bits.  This is not the same
+rule as the compiler uses to calculate the value of a constant
+expression, and may give different results in some cases.  If the value
+comes out to be nonzero, the :samp:`#if` succeeds and the :samp:`{controlled
+text}` is included; otherwise it is skipped.
+
+.. index:: defined
+
+.. _defined:
+
+Defined
+^^^^^^^
+
+The special operator ``defined`` is used in :samp:`#if` and
+:samp:`#elif` expressions to test whether a certain name is defined as a
+macro.  ``defined name`` and ``defined (name)`` are
+both expressions whose value is 1 if :samp:`{name}` is defined as a macro at
+the current point in the program, and 0 otherwise.  Thus,  ``#if
+defined MACRO`` is precisely equivalent to ``#ifdef MACRO``.
+
+``defined`` is useful when you wish to test more than one macro for
+existence at once.  For example,
+
+.. code-block:: c++
+
+  #if defined (__vax__) || defined (__ns16000__)
+
+would succeed if either of the names ``__vax__`` or
+``__ns16000__`` is defined as a macro.
+
+Conditionals written like this:
+
+.. code-block:: c++
+
+  #if defined BUFSIZE && BUFSIZE >= 1024
+
+can generally be simplified to just ``#if BUFSIZE >= 1024``,
+since if ``BUFSIZE`` is not defined, it will be interpreted as having
+the value zero.
+
+If the ``defined`` operator appears as a result of a macro expansion,
+the C standard says the behavior is undefined.  GNU cpp treats it as a
+genuine ``defined`` operator and evaluates it normally.  It will warn
+wherever your code uses this feature if you use the command-line option
+:option:`-Wpedantic`, since other compilers may handle it differently.  The
+warning is also enabled by :option:`-Wextra`, and can also be enabled
+individually with :option:`-Wexpansion-to-defined`.
+
+.. index:: #else
+
+.. _else:
+
+Else
+^^^^
+
+The :samp:`#else` directive can be added to a conditional to provide
+alternative text to be used if the condition fails.  This is what it
+looks like:
+
+.. code-block:: c++
+
+  #if expression
+  text-if-true
+  #else /* Not expression */
+  text-if-false
+  #endif /* Not expression */
+
+If :samp:`{expression}` is nonzero, the :samp:`{text-if-true}` is included and
+the :samp:`{text-if-false}` is skipped.  If :samp:`{expression}` is zero, the
+opposite happens.
+
+You can use :samp:`#else` with :samp:`#ifdef` and :samp:`#ifndef`, too.
+
+.. index:: #elif
+
+.. _elif:
+
+Elif
+^^^^
+
+One common case of nested conditionals is used to check for more than two
+possible alternatives.  For example, you might have
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #else /* X != 1 */
+  #if X == 2
+  ...
+  #else /* X != 2 */
+  ...
+  #endif /* X != 2 */
+  #endif /* X != 1 */
+
+Another conditional directive, :samp:`#elif`, allows this to be
+abbreviated as follows:
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #elif X == 2
+  ...
+  #else /* X != 2 and X != 1*/
+  ...
+  #endif /* X != 2 and X != 1*/
+
+:samp:`#elif` stands for 'else if'.  Like :samp:`#else`, it goes in the
+middle of a conditional group and subdivides it; it does not require a
+matching :samp:`#endif` of its own.  Like :samp:`#if`, the :samp:`#elif`
+directive includes an expression to be tested.  The text following the
+:samp:`#elif` is processed only if the original :samp:`#if`-condition
+failed and the :samp:`#elif` condition succeeds.
+
+More than one :samp:`#elif` can go in the same conditional group.  Then
+the text after each :samp:`#elif` is processed only if the :samp:`#elif`
+condition succeeds after the original :samp:`#if` and all previous
+:samp:`#elif` directives within it have failed.
+
+:samp:`#else` is allowed after any number of :samp:`#elif` directives, but
+:samp:`#elif` may not follow :samp:`#else`.
+
+.. index:: __has_attribute
+
+__has_attribute
+^^^^^^^^^^^^^^^
+
+The special operator ``__has_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions to test whether the attribute
+referenced by its :samp:`{operand}` is recognized by GCC.  Using the operator
+in other contexts is not valid.  In C code, if compiling for strict
+conformance to standards before C2x, :samp:`{operand}` must be
+a valid identifier.  Otherwise, :samp:`{operand}` may be optionally
+introduced by the ``attribute-scope::`` prefix.
+The :samp:`{attribute-scope}` prefix identifies the 'namespace' within
+which the attribute is recognized.  The scope of GCC attributes is
+:samp:`gnu` or :samp:`__gnu__`.  The ``__has_attribute`` operator by
+itself, without any :samp:`{operand}` or parentheses, acts as a predefined
+macro so that support for it can be tested in portable code.  Thus,
+the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_attribute
+  #  if __has_attribute (nonnull)
+  #    define ATTR_NONNULL __attribute__ ((nonnull))
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_attribute`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression as
+shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_attribute && __has_attribute (nonnull)   /* not portable */
+  ...
+  #endif
+
+.. index:: __has_cpp_attribute
+
+__has_cpp_attribute
+^^^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_cpp_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions in C++ code to test whether
+the attribute referenced by its :samp:`{operand}` is recognized by GCC.
+``__has_cpp_attribute (operand)`` is equivalent to
+``__has_attribute (operand)`` except that when :samp:`{operand}`
+designates a supported standard attribute it evaluates to an integer
+constant of the form ``YYYYMM`` indicating the year and month when
+the attribute was first introduced into the C++ standard.  For additional
+information including the dates of the introduction of current standard
+attributes, see `SD-6: SG10 Feature Test Recommendations <https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations/>`_.
+
+.. index:: __has_c_attribute
+
+__has_c_attribute
+^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_c_attribute (operand)`` may be
+used in :samp:`#if` and :samp:`#elif` expressions in C code to test
+whether the attribute referenced by its :samp:`{operand}` is recognized by
+GCC in attributes using the :samp:`[[]]` syntax.  GNU attributes must
+be specified with the scope :samp:`gnu` or :samp:`__gnu__` with
+``__has_c_attribute``.  When :samp:`{operand}` designates a supported
+standard attribute it evaluates to an integer constant of the form
+``YYYYMM`` indicating the year and month when the attribute was
+first introduced into the C standard, or when the syntax of operands
+to the attribute was extended in the C standard.
+
+.. index:: __has_builtin
+
+__has_builtin
+^^^^^^^^^^^^^
+
+The special operator ``__has_builtin (operand)`` may be used in
+constant integer contexts and in preprocessor :samp:`#if` and :samp:`#elif`
+expressions to test whether the symbol named by its :samp:`{operand}` is
+recognized as a built-in function by GCC in the current language and
+conformance mode.  It evaluates to a constant integer with a nonzero
+value if the argument refers to such a function, and to zero otherwise.
+The operator may also be used in preprocessor :samp:`#if` and :samp:`#elif`
+expressions.  The ``__has_builtin`` operator by itself, without any
+:samp:`{operand}` or parentheses, acts as a predefined macro so that support
+for it can be tested in portable code.  Thus, the recommended use of
+the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_builtin
+  #  if __has_builtin (__builtin_object_size)
+  #    define builtin_object_size(ptr) __builtin_object_size (ptr, 2)
+  #  endif
+  #endif
+  #ifndef builtin_object_size
+  #  define builtin_object_size(ptr)   ((size_t)-1)
+  #endif
+
+.. index:: __has_include
+
+__has_include
+^^^^^^^^^^^^^
+
+The special operator ``__has_include (operand)`` may be used in
+:samp:`#if` and :samp:`#elif` expressions to test whether the header referenced
+by its :samp:`{operand}` can be included using the :samp:`#include` directive.  Using
+the operator in other contexts is not valid.  The :samp:`{operand}` takes
+the same form as the file in the :samp:`#include` directive (see :ref:`include-syntax`) and evaluates to a nonzero value if the header can be included and
+to zero otherwise.  Note that that the ability to include a header doesn't
+imply that the header doesn't contain invalid constructs or :samp:`#error`
+directives that would cause the preprocessor to fail.
+
+The ``__has_include`` operator by itself, without any :samp:`{operand}` or
+parentheses, acts as a predefined macro so that support for it can be tested
+in portable code.  Thus, the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_include
+  #  if __has_include (<stdatomic.h>)
+  #    include <stdatomic.h>
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_include`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression
+as shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_include && __has_include ("header.h")   /* not portable */
+  ...
+  #endif
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-uses.rst b/gcc/doc/cpp/conditional-uses.rst
new file mode 100644
index 00000000000..59555a5828d
--- /dev/null
+++ b/gcc/doc/cpp/conditional-uses.rst
@@ -0,0 +1,32 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _conditional-uses:
+
+Conditional Uses
+****************
+
+There are three general reasons to use a conditional.
+
+* A program may need to use different code depending on the machine or
+  operating system it is to run on.  In some cases the code for one
+  operating system may be erroneous on another operating system; for
+  example, it might refer to data types or constants that do not exist on
+  the other system.  When this happens, it is not enough to avoid
+  executing the invalid code.  Its mere presence will cause the compiler
+  to reject the program.  With a preprocessing conditional, the offending
+  code can be effectively excised from the program when it is not valid.
+
+* You may want to be able to compile the same source file into two
+  different programs.  One version might make frequent time-consuming
+  consistency checks on its intermediate data, or print the values of
+  those data for debugging, and the other not.
+
+* A conditional whose condition is always false is one way to exclude code
+  from the program but keep it as a sort of comment for future reference.
+
+Simple programs that do not need system-specific logic or complex
+debugging hooks generally will not need to use preprocessing
+conditionals.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditionals.rst b/gcc/doc/cpp/conditionals.rst
new file mode 100644
index 00000000000..381a6124da4
--- /dev/null
+++ b/gcc/doc/cpp/conditionals.rst
@@ -0,0 +1,44 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: conditionals
+
+.. _conditionals:
+
+Conditionals
+------------
+
+A :dfn:`conditional` is a directive that instructs the preprocessor to
+select whether or not to include a chunk of code in the final token
+stream passed to the compiler.  Preprocessor conditionals can test
+arithmetic expressions, or whether a name is defined as a macro, or both
+simultaneously using the special ``defined`` operator.
+
+A conditional in the C preprocessor resembles in some ways an ``if``
+statement in C, but it is important to understand the difference between
+them.  The condition in an ``if`` statement is tested during the
+execution of your program.  Its purpose is to allow your program to
+behave differently from run to run, depending on the data it is
+operating on.  The condition in a preprocessing conditional directive is
+tested when your program is compiled.  Its purpose is to allow different
+code to be included in the program depending on the situation at the
+time of compilation.
+
+However, the distinction is becoming less clear.  Modern compilers often
+do test ``if`` statements when a program is compiled, if their
+conditions are known not to vary at run time, and eliminate code which
+can never be executed.  If you can count on your compiler to do this,
+you may find that your program is more readable if you use ``if``
+statements with constant conditions (perhaps determined by macros).  Of
+course, you can only use this to exclude code, not type definitions or
+other preprocessing directives, and you can only do it if the code
+remains syntactically valid when it is not to be used.
+
+.. toctree::
+  :maxdepth: 2
+
+  conditional-uses
+  conditional-syntax
+  deleted-code
\ No newline at end of file
diff --git a/gcc/doc/cpp/conf.py b/gcc/doc/cpp/conf.py
new file mode 100644
index 00000000000..29d3aed4558
--- /dev/null
+++ b/gcc/doc/cpp/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'cpp'
+project = 'The C Preprocessor'
+copyright = '1987-2022 Free Software Foundation, Inc.'
+authors = 'Richard M. Stallman, Zachary Weinberg'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invocation', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/doc/cpp/copyright.rst b/gcc/doc/cpp/copyright.rst
new file mode 100644
index 00000000000..fa61190ddf7
--- /dev/null
+++ b/gcc/doc/cpp/copyright.rst
@@ -0,0 +1,24 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, the Front-Cover Texts being (a) (see below), and
+with the Back-Cover Texts being (b) (see below).
+A copy of the license is included in the :ref:`gnu_fdl`.
+
+(a) The FSF's Front-Cover Text is:
+
+     A GNU Manual
+
+(b) The FSF's Back-Cover Text is:
+
+     You have freedom to copy and modify this GNU Manual, like GNU
+     software.  Copies published by the Free Software Foundation raise
+     funds for GNU development.
\ No newline at end of file
diff --git a/gcc/doc/cpp/deleted-code.rst b/gcc/doc/cpp/deleted-code.rst
new file mode 100644
index 00000000000..758e0c1c0a3
--- /dev/null
+++ b/gcc/doc/cpp/deleted-code.rst
@@ -0,0 +1,34 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: commenting out code
+
+.. _deleted-code:
+
+Deleted Code
+************
+
+If you replace or delete a part of the program but want to keep the old
+code around for future reference, you often cannot simply comment it
+out.  Block comments do not nest, so the first comment inside the old
+code will end the commenting-out.  The probable result is a flood of
+syntax errors.
+
+One way to avoid this problem is to use an always-false conditional
+instead.  For instance, put ``#if 0`` before the deleted code and
+``#endif`` after it.  This works even if the code being turned
+off contains conditionals, but they must be entire conditionals
+(balanced :samp:`#if` and :samp:`#endif`).
+
+Some people use ``#ifdef notdef`` instead.  This is risky, because
+``notdef`` might be accidentally defined as a macro, and then the
+conditional would succeed.  ``#if 0`` can be counted on to fail.
+
+Do not use ``#if 0`` for comments which are not C code.  Use a real
+comment, instead.  The interior of ``#if 0`` must consist of complete
+tokens; in particular, single-quote characters must balance.  Comments
+often contain unbalanced single-quote characters (known in English as
+apostrophes).  These confuse ``#if 0``.  They don't confuse
+:samp:`/*`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/diagnostics.rst b/gcc/doc/cpp/diagnostics.rst
new file mode 100644
index 00000000000..beaad7d8217
--- /dev/null
+++ b/gcc/doc/cpp/diagnostics.rst
@@ -0,0 +1,51 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: diagnostic, reporting errors, reporting warnings, #error
+
+.. _diagnostics:
+
+Diagnostics
+-----------
+
+The directive :samp:`#error` causes the preprocessor to report a fatal
+error.  The tokens forming the rest of the line following :samp:`#error`
+are used as the error message.
+
+You would use :samp:`#error` inside of a conditional that detects a
+combination of parameters which you know the program does not properly
+support.  For example, if you know that the program will not run
+properly on a VAX, you might write
+
+.. code-block:: c++
+
+  #ifdef __vax__
+  #error "Won't work on VAXen.  See comments at get_last_object."
+  #endif
+
+If you have several configuration parameters that must be set up by
+the installation in a consistent way, you can use conditionals to detect
+an inconsistency and report it with :samp:`#error`.  For example,
+
+.. code-block:: c++
+
+  #if !defined(FOO) && defined(BAR)
+  #error "BAR requires FOO."
+  #endif
+
+.. index:: #warning
+
+The directive :samp:`#warning` is like :samp:`#error`, but causes the
+preprocessor to issue a warning and continue preprocessing.  The tokens
+following :samp:`#warning` are used as the warning message.
+
+You might use :samp:`#warning` in obsolete header files, with a message
+directing the user to the header file which should be used instead.
+
+Neither :samp:`#error` nor :samp:`#warning` macro-expands its argument.
+Internal whitespace sequences are each replaced with a single space.
+The line must consist of complete tokens.  It is wisest to make the
+argument of these directives be a single string constant; this avoids
+problems with apostrophes and the like.
\ No newline at end of file
diff --git a/gcc/doc/cpp/environment-variables.rst b/gcc/doc/cpp/environment-variables.rst
new file mode 100644
index 00000000000..c0ab7992905
--- /dev/null
+++ b/gcc/doc/cpp/environment-variables.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: environment variables
+
+.. _environment-variables:
+
+Environment Variables
+---------------------
+
+This section describes the environment variables that affect how CPP
+operates.  You can use them to specify directories or prefixes to use
+when searching for include files, or to control dependency output.
+
+Note that you can also specify places to search using options such as
+:option:`-I`, and control dependency output with options like
+:option:`-M` (see :ref:`invocation`).  These take precedence over
+environment variables, which in turn take precedence over the
+configuration of GCC.
+
+.. include:: ../../../doc/cppenv.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/gnu-free-documentation-license.rst b/gcc/doc/cpp/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/doc/cpp/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files.rst b/gcc/doc/cpp/header-files.rst
new file mode 100644
index 00000000000..13b9841c3c6
--- /dev/null
+++ b/gcc/doc/cpp/header-files.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: header file
+
+.. _header-files:
+
+Header Files
+------------
+
+A header file is a file containing C declarations and macro definitions
+(see :ref:`macros`) to be shared between several source files.  You request
+the use of a header file in your program by :dfn:`including` it, with the
+C preprocessing directive :samp:`#include`.
+
+Header files serve two purposes.
+
+.. index:: system header files
+
+* System header files declare the interfaces to parts of the operating
+  system.  You include them in your program to supply the definitions and
+  declarations you need to invoke system calls and libraries.
+
+* Your own header files contain declarations for interfaces between the
+  source files of your program.  Each time you have a group of related
+  declarations and macro definitions all or most of which are needed in
+  several different source files, it is a good idea to create a header
+  file for them.
+
+Including a header file produces the same results as copying the header
+file into each source file that needs it.  Such copying would be
+time-consuming and error-prone.  With a header file, the related
+declarations appear in only one place.  If they need to be changed, they
+can be changed in one place, and programs that include the header file
+will automatically use the new version when next recompiled.  The header
+file eliminates the labor of finding and changing all the copies as well
+as the risk that a failure to find one copy will result in
+inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with
+:samp:`.h`.  It is most portable to use only letters, digits, dashes, and
+underscores in header file names, and at most one dot.
+
+.. toctree::
+  :maxdepth: 2
+
+  header-files/include-syntax
+  header-files/include-operation
+  header-files/search-path
+  header-files/once-only-headers
+  header-files/alternatives-to-wrapper-ifndef
+  header-files/computed-includes
+  header-files/wrapper-headers
+  header-files/system-headers
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
new file mode 100644
index 00000000000..e38cffeaf38
--- /dev/null
+++ b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
@@ -0,0 +1,40 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _alternatives-to-wrapper-ifndef:
+
+Alternatives to Wrapper #ifndef
+*******************************
+
+CPP supports two more ways of indicating that a header file should be
+read only once.  Neither one is as portable as a wrapper :samp:`#ifndef`
+and we recommend you do not use them in new programs, with the caveat
+that :samp:`#import` is standard practice in Objective-C.
+
+.. index:: #import
+
+CPP supports a variant of :samp:`#include` called :samp:`#import` which
+includes a file, but does so at most once.  If you use :samp:`#import`
+instead of :samp:`#include`, then you don't need the conditionals
+inside the header file to prevent multiple inclusion of the contents.
+:samp:`#import` is standard in Objective-C, but is considered a
+deprecated extension in C and C++.
+
+:samp:`#import` is not a well designed feature.  It requires the users of
+a header file to know that it should only be included once.  It is much
+better for the header file's implementor to write the file so that users
+don't need to know this.  Using a wrapper :samp:`#ifndef` accomplishes
+this goal.
+
+In the present implementation, a single use of :samp:`#import` will
+prevent the file from ever being read again, by either :samp:`#import` or
+:samp:`#include`.  You should not rely on this; do not use both
+:samp:`#import` and :samp:`#include` to refer to the same header file.
+
+Another way to prevent a header file from being included more than once
+is with the :samp:`#pragma once` directive (see :ref:`pragmas`).
+:samp:`#pragma once` does not have the problems that :samp:`#import` does,
+but it is not recognized by all preprocessors, so you cannot rely on it
+in a portable program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/computed-includes.rst b/gcc/doc/cpp/header-files/computed-includes.rst
new file mode 100644
index 00000000000..49c16228032
--- /dev/null
+++ b/gcc/doc/cpp/header-files/computed-includes.rst
@@ -0,0 +1,86 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: computed includes, macros in include
+
+.. _computed-includes:
+
+Computed Includes
+*****************
+
+Sometimes it is necessary to select one of several different header
+files to be included into your program.  They might specify
+configuration parameters to be used on different sorts of operating
+systems, for instance.  You could do this with a series of conditionals,
+
+.. code-block:: c++
+
+  #if SYSTEM_1
+  # include "system_1.h"
+  #elif SYSTEM_2
+  # include "system_2.h"
+  #elif SYSTEM_3
+  ...
+  #endif
+
+That rapidly becomes tedious.  Instead, the preprocessor offers the
+ability to use a macro for the header name.  This is called a
+:dfn:`computed include`.  Instead of writing a header name as the direct
+argument of :samp:`#include`, you simply put a macro name there instead:
+
+.. code-block:: c++
+
+  #define SYSTEM_H "system_1.h"
+  ...
+  #include SYSTEM_H
+
+``SYSTEM_H`` will be expanded, and the preprocessor will look for
+:samp:`system_1.h` as if the :samp:`#include` had been written that way
+originally.  ``SYSTEM_H`` could be defined by your Makefile with a
+:option:`-D` option.
+
+You must be careful when you define the macro.  :samp:`#define` saves
+tokens, not text.  The preprocessor has no way of knowing that the macro
+will be used as the argument of :samp:`#include`, so it generates
+ordinary tokens, not a header name.  This is unlikely to cause problems
+if you use double-quote includes, which are close enough to string
+constants.  If you use angle brackets, however, you may have trouble.
+
+The syntax of a computed include is actually a bit more general than the
+above.  If the first non-whitespace character after :samp:`#include` is
+not :samp:`"` or :samp:`<`, then the entire line is macro-expanded
+like running text would be.
+
+If the line expands to a single string constant, the contents of that
+string constant are the file to be included.  CPP does not re-examine the
+string for embedded quotes, but neither does it process backslash
+escapes in the string.  Therefore
+
+.. code-block:: c++
+
+  #define HEADER "a\"b"
+  #include HEADER
+
+looks for a file named :samp:`a\\"b`.  CPP searches for the file according
+to the rules for double-quoted includes.
+
+If the line expands to a token stream beginning with a :samp:`<` token
+and including a :samp:`>` token, then the tokens between the :samp:`<` and
+the first :samp:`>` are combined to form the filename to be included.
+Any whitespace between tokens is reduced to a single space; then any
+space after the initial :samp:`<` is retained, but a trailing space
+before the closing :samp:`>` is ignored.  CPP searches for the file
+according to the rules for angle-bracket includes.
+
+In either case, if there are any tokens on the line after the file name,
+an error occurs and the directive is not processed.  It is also an error
+if the result of expansion does not match either of the two expected
+forms.
+
+These rules are implementation-defined behavior according to the C
+standard.  To minimize the risk of different compilers interpreting your
+computed includes differently, we recommend you use only a single
+object-like macro which expands to a string constant.  This will also
+minimize confusion for people reading your program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-operation.rst b/gcc/doc/cpp/header-files/include-operation.rst
new file mode 100644
index 00000000000..465905698e7
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-operation.rst
@@ -0,0 +1,67 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _include-operation:
+
+Include Operation
+*****************
+
+The :samp:`#include` directive works by directing the C preprocessor to
+scan the specified file as input before continuing with the rest of the
+current file.  The output from the preprocessor contains the output
+already generated, followed by the output resulting from the included
+file, followed by the output that comes from the text after the
+:samp:`#include` directive.  For example, if you have a header file
+:samp:`header.h` as follows,
+
+.. code-block:: c++
+
+  char *test (void);
+
+and a main program called :samp:`program.c` that uses the header file,
+like this,
+
+.. code-block:: c++
+
+  int x;
+  #include "header.h"
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+the compiler will see the same token stream as it would if
+:samp:`program.c` read
+
+.. code-block:: c++
+
+  int x;
+  char *test (void);
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+Included files are not limited to declarations and macro definitions;
+those are merely the typical uses.  Any fragment of a C program can be
+included from another file.  The include file could even contain the
+beginning of a statement that is concluded in the containing file, or
+the end of a statement that was started in the including file.  However,
+an included file must consist of complete tokens.  Comments and string
+literals which have not been closed by the end of an included file are
+invalid.  For error recovery, they are considered to end at the end of
+the file.
+
+To avoid confusion, it is best if header files contain only complete
+syntactic units---function declarations or definitions, type
+declarations, etc.
+
+The line following the :samp:`#include` directive is always treated as a
+separate line by the C preprocessor, even if the included file lacks a
+final newline.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-syntax.rst b/gcc/doc/cpp/header-files/include-syntax.rst
new file mode 100644
index 00000000000..a378dfc5375
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-syntax.rst
@@ -0,0 +1,42 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #include
+
+.. _include-syntax:
+
+Include Syntax
+**************
+
+Both user and system header files are included using the preprocessing
+directive :samp:`#include`.  It has two variants:
+
+:samp:`#include <{file}>`
+  This variant is used for system header files.  It searches for a file
+  named :samp:`{file}` in a standard list of system directories.  You can prepend
+  directories to this list with the :option:`-I` option (see :ref:`invocation`).
+
+:samp:`#include "{file}"`
+  This variant is used for header files of your own program.  It
+  searches for a file named :samp:`{file}` first in the directory containing
+  the current file, then in the quote directories and then the same
+  directories used for ``<file>``.  You can prepend directories
+  to the list of quote directories with the :option:`-iquote` option.
+
+The argument of :samp:`#include`, whether delimited with quote marks or
+angle brackets, behaves like a string constant in that comments are not
+recognized, and macro names are not expanded.  Thus, ``#include
+<x/*y>`` specifies inclusion of a system header file named :samp:`x/*y`.
+
+However, if backslashes occur within :samp:`{file}`, they are considered
+ordinary text characters, not escape characters.  None of the character
+escape sequences appropriate to string constants in C are processed.
+Thus, ``#include "x\n\\y"`` specifies a filename containing three
+backslashes.  (Some systems interpret :samp:`\\` as a pathname separator.
+All of these also interpret :samp:`/` the same way.  It is most portable
+to use only :samp:`/`.)
+
+It is an error if there is anything (other than comments) on the line
+after the file name.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/once-only-headers.rst b/gcc/doc/cpp/header-files/once-only-headers.rst
new file mode 100644
index 00000000000..2ee77771620
--- /dev/null
+++ b/gcc/doc/cpp/header-files/once-only-headers.rst
@@ -0,0 +1,52 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: repeated inclusion, including just once, wrapper #ifndef
+
+.. _once-only-headers:
+
+Once-Only Headers
+*****************
+
+If a header file happens to be included twice, the compiler will process
+its contents twice.  This is very likely to cause an error, e.g. when the
+compiler sees the same structure definition twice.  Even if it does not,
+it will certainly waste time.
+
+The standard way to prevent this is to enclose the entire real contents
+of the file in a conditional, like this:
+
+.. code-block:: c++
+
+  /* File foo.  */
+  #ifndef FILE_FOO_SEEN
+  #define FILE_FOO_SEEN
+
+  the entire file
+
+  #endif /* !FILE_FOO_SEEN */
+
+This construct is commonly known as a :dfn:`wrapper #ifndef`.
+When the header is included again, the conditional will be false,
+because ``FILE_FOO_SEEN`` is defined.  The preprocessor will skip
+over the entire contents of the file, and the compiler will not see it
+twice.
+
+CPP optimizes even further.  It remembers when a header file has a
+wrapper :samp:`#ifndef`.  If a subsequent :samp:`#include` specifies that
+header, and the macro in the :samp:`#ifndef` is still defined, it does
+not bother to rescan the file at all.
+
+You can put comments outside the wrapper.  They will not interfere with
+this optimization.
+
+.. index:: controlling macro, guard macro
+
+The macro ``FILE_FOO_SEEN`` is called the :dfn:`controlling macro` or
+:dfn:`guard macro`.  In a user header file, the macro name should not
+begin with :samp:`_`.  In a system header file, it should begin with
+:samp:`__` to avoid conflicts with user programs.  In any kind of header
+file, the macro name should contain the name of the file and some
+additional text, to avoid conflicts with other header files.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/search-path.rst b/gcc/doc/cpp/header-files/search-path.rst
new file mode 100644
index 00000000000..9f87878517f
--- /dev/null
+++ b/gcc/doc/cpp/header-files/search-path.rst
@@ -0,0 +1,53 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _search-path:
+
+Search Path
+***********
+
+By default, the preprocessor looks for header files included by the quote
+form of the directive ``#include "file"`` first relative to
+the directory of the current file, and then in a preconfigured list
+of standard system directories.
+For example, if :samp:`/usr/include/sys/stat.h` contains
+``#include "types.h"``, GCC looks for :samp:`types.h` first in
+:samp:`/usr/include/sys`, then in its usual search path.
+
+For the angle-bracket form ``#include <file>``, the
+preprocessor's default behavior is to look only in the standard system
+directories.  The exact search directory list depends on the target
+system, how GCC is configured, and where it is installed.  You can
+find the default search directory list for your version of CPP by
+invoking it with the :option:`-v` option.  For example,
+
+.. code-block:: c++
+
+  cpp -v /dev/null -o /dev/null
+
+There are a number of command-line options you can use to add
+additional directories to the search path.
+The most commonly-used option is :option:`-Idir`, which causes
+:samp:`{dir}` to be searched after the current directory (for the quote
+form of the directive) and ahead of the standard system directories.
+You can specify multiple :option:`-I` options on the command line,
+in which case the directories are searched in left-to-right order.
+
+If you need separate control over the search paths for the quote and
+angle-bracket forms of the :samp:`#include` directive, you can use the
+:option:`-iquote` and/or :option:`-isystem` options instead of :option:`-I`.
+See :ref:`invocation`, for a detailed description of these options, as
+well as others that are less generally useful.
+
+If you specify other options on the command line, such as :option:`-I`,
+that affect where the preprocessor searches for header files, the
+directory list printed by the :option:`-v` option reflects the actual
+search path used by the preprocessor.
+
+Note that you can also prevent the preprocessor from searching any of
+the default system header directories with the :option:`-nostdinc`
+option.  This is useful when you are compiling an operating system
+kernel or some other program that does not use the standard C library
+facilities, or the standard C library itself.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/system-headers.rst b/gcc/doc/cpp/header-files/system-headers.rst
new file mode 100644
index 00000000000..ef6474f9dea
--- /dev/null
+++ b/gcc/doc/cpp/header-files/system-headers.rst
@@ -0,0 +1,41 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: system header files
+
+.. _system-headers:
+
+System Headers
+**************
+
+The header files declaring interfaces to the operating system and
+runtime libraries often cannot be written in strictly conforming C.
+Therefore, GCC gives code found in :dfn:`system headers` special
+treatment.  All warnings, other than those generated by :samp:`#warning`
+(see :ref:`diagnostics`), are suppressed while GCC is processing a system
+header.  Macros defined in a system header are immune to a few warnings
+wherever they are expanded.  This immunity is granted on an ad-hoc
+basis, when we find that a warning generates lots of false positives
+because of code in macros defined in system headers.
+
+Normally, only the headers found in specific directories are considered
+system headers.  These directories are determined when GCC is compiled.
+There are, however, two ways to make normal headers into system headers:
+
+* Header files found in directories added to the search path with the
+  :option:`-isystem` and :option:`-idirafter` command-line options are
+  treated as system headers for the purposes of diagnostics.
+
+*
+  .. index:: #pragma GCC system_header
+
+  There is also a directive, ``#pragma GCC system_header``, which
+  tells GCC to consider the rest of the current include file a system
+  header, no matter where it was found.  Code that comes before the
+  :samp:`#pragma` in the file is not affected.  ``#pragma GCC
+  system_header`` has no effect in the primary source file.
+
+On some targets, such as RS/6000 AIX, GCC implicitly surrounds all
+system headers with an :samp:`extern "C"` block when compiling as C++.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/wrapper-headers.rst b/gcc/doc/cpp/header-files/wrapper-headers.rst
new file mode 100644
index 00000000000..848170e138e
--- /dev/null
+++ b/gcc/doc/cpp/header-files/wrapper-headers.rst
@@ -0,0 +1,58 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: wrapper headers, overriding a header file, #include_next
+
+.. _wrapper-headers:
+
+Wrapper Headers
+***************
+
+Sometimes it is necessary to adjust the contents of a system-provided
+header file without editing it directly.  GCC's :command:`fixincludes`
+operation does this, for example.  One way to do that would be to create
+a new header file with the same name and insert it in the search path
+before the original header.  That works fine as long as you're willing
+to replace the old header entirely.  But what if you want to refer to
+the old header from the new one?
+
+You cannot simply include the old header with :samp:`#include`.  That
+will start from the beginning, and find your new header again.  If your
+header is not protected from multiple inclusion (see :ref:`once-only-headers`), it will recurse infinitely and cause a fatal error.
+
+You could include the old header with an absolute pathname:
+
+.. code-block:: c++
+
+  #include "/usr/include/old-header.h"
+
+This works, but is not clean; should the system headers ever move, you
+would have to edit the new headers to match.
+
+There is no way to solve this problem within the C standard, but you can
+use the GNU extension :samp:`#include_next`.  It means, 'Include the
+*next* file with this name'.  This directive works like
+:samp:`#include` except in searching for the specified file: it starts
+searching the list of header file directories *after* the directory
+in which the current file was found.
+
+Suppose you specify :option:`-I /usr/local/include`, and the list of
+directories to search also includes :samp:`/usr/include`; and suppose
+both directories contain :samp:`signal.h`.  Ordinary ``#include
+<signal.h>`` finds the file under :samp:`/usr/local/include`.  If that
+file contains ``#include_next <signal.h>``, it starts searching
+after that directory, and finds the file in :samp:`/usr/include`.
+
+:samp:`#include_next` does not distinguish between ``<file>``
+and ``"file"`` inclusion, nor does it check that the file you
+specify has the same name as the current file.  It simply looks for the
+file named, starting with the directory in the search path after the one
+where the current file was found.
+
+The use of :samp:`#include_next` can lead to great confusion.  We
+recommend it be used only when there is no other alternative.  In
+particular, it should not be used in the headers belonging to a specific
+program; it should be used only to make global corrections along the
+lines of :command:`fixincludes`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-defined-behavior.rst b/gcc/doc/cpp/implementation-defined-behavior.rst
new file mode 100644
index 00000000000..8946520eefe
--- /dev/null
+++ b/gcc/doc/cpp/implementation-defined-behavior.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-defined-behavior:
+
+.. _identifier-characters:
+
+Implementation-defined behavior
+*******************************
+
+This is how CPP behaves in all the cases which the C standard
+describes as :dfn:`implementation-defined`.  This term means that the
+implementation is free to do what it likes, but must document its choice
+and stick to it.
+
+.. todo:: Check the C++ standard for more implementation-defined stuff.
+
+* The mapping of physical source file multi-byte characters to the
+  execution character set.
+
+  The input character set can be specified using the
+  :option:`-finput-charset` option, while the execution character set may
+  be controlled using the :option:`-fexec-charset` and
+  :option:`-fwide-exec-charset` options.
+
+* Identifier characters.
+
+  The C and C++ standards allow identifiers to be composed of :samp:`_`
+  and the alphanumeric characters.  C++ also allows universal character
+  names.  C99 and later C standards permit both universal character
+  names and implementation-defined characters.  In both C and C++ modes,
+  GCC accepts in identifiers exactly those extended characters that
+  correspond to universal character names permitted by the chosen
+  standard.
+
+  GCC allows the :samp:`$` character in identifiers as an extension for
+  most targets.  This is true regardless of the std= switch,
+  since this extension cannot conflict with standards-conforming
+  programs.  When preprocessing assembler, however, dollars are not
+  identifier characters by default.
+
+  Currently the targets that by default do not permit :samp:`$` are AVR,
+  IP2K, MMIX, MIPS Irix 3, ARM aout, and PowerPC targets for the AIX
+  operating system.
+
+  You can override the default with :option:`-fdollars-in-identifiers` or
+  :option:`-fno-dollars-in-identifiers`.  See :option:`-fdollars-in-identifiers`.
+
+* Non-empty sequences of whitespace characters.
+
+  In textual output, each whitespace sequence is collapsed to a single
+  space.  For aesthetic reasons, the first token on each non-directive
+  line of output is preceded with sufficient spaces that it appears in the
+  same column as it did in the original source file.
+
+* The numeric value of character constants in preprocessor expressions.
+
+  The preprocessor and compiler interpret character constants in the
+  same way; i.e. escape sequences such as :samp:`\\a` are given the
+  values they would have on the target machine.
+
+  The compiler evaluates a multi-character character constant a character
+  at a time, shifting the previous value left by the number of bits per
+  target character, and then or-ing in the bit-pattern of the new
+  character truncated to the width of a target character.  The final
+  bit-pattern is given type ``int``, and is therefore signed,
+  regardless of whether single characters are signed or not.
+  If there are more
+  characters in the constant than would fit in the target ``int`` the
+  compiler issues a warning, and the excess leading characters are
+  ignored.
+
+  For example, ``'ab'`` for a target with an 8-bit ``char`` would be
+  interpreted as :samp:`(int) ((unsigned char) 'a' * 256 + (unsigned char)
+  'b')`, and ``'\234a'`` as :samp:`(int) ((unsigned char) '\\234' *
+  256 + (unsigned char) 'a')`.
+
+* Source file inclusion.
+
+  For a discussion on how the preprocessor locates header files,
+  :ref:`include-operation`.
+
+* Interpretation of the filename resulting from a macro-expanded
+  :samp:`#include` directive.
+
+  See :ref:`computed-includes`.
+
+* Treatment of a :samp:`#pragma` directive that after macro-expansion
+  results in a standard pragma.
+
+  No macro expansion occurs on any :samp:`#pragma` directive line, so the
+  question does not arise.
+
+  Note that GCC does not yet implement any of the standard
+  pragmas.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-details.rst b/gcc/doc/cpp/implementation-details.rst
new file mode 100644
index 00000000000..326277b1fc9
--- /dev/null
+++ b/gcc/doc/cpp/implementation-details.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-details:
+
+Implementation Details
+----------------------
+
+Here we document details of how the preprocessor's implementation
+affects its user-visible behavior.  You should try to avoid undue
+reliance on behavior described here, as it is possible that it will
+change subtly in future implementations.
+
+Also documented here are obsolete features still supported by CPP.
+
+.. toctree::
+  :maxdepth: 2
+
+  implementation-defined-behavior
+  implementation-limits
+  obsolete-features
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-limits.rst b/gcc/doc/cpp/implementation-limits.rst
new file mode 100644
index 00000000000..18cfc6ab0a6
--- /dev/null
+++ b/gcc/doc/cpp/implementation-limits.rst
@@ -0,0 +1,68 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: implementation limits
+
+.. _implementation-limits:
+
+Implementation limits
+*********************
+
+CPP has a small number of internal limits.  This section lists the
+limits which the C standard requires to be no lower than some minimum,
+and all the others known.  It is intended that there should be as few limits
+as possible.  If you encounter an undocumented or inconvenient limit,
+please report that as a bug.  See :ref:`gcc:bugs`.
+
+Where we say something is limited :dfn:`only by available memory`, that
+means that internal data structures impose no intrinsic limit, and space
+is allocated with ``malloc`` or equivalent.  The actual limit will
+therefore depend on many things, such as the size of other things
+allocated by the compiler at the same time, the amount of memory
+consumed by other processes on the same computer, etc.
+
+* Nesting levels of :samp:`#include` files.
+
+  We impose an arbitrary limit of 200 levels, to avoid runaway recursion.
+  The standard requires at least 15 levels.
+
+* Nesting levels of conditional inclusion.
+
+  The C standard mandates this be at least 63.  CPP is limited only by
+  available memory.
+
+* Levels of parenthesized expressions within a full expression.
+
+  The C standard requires this to be at least 63.  In preprocessor
+  conditional expressions, it is limited only by available memory.
+
+* Significant initial characters in an identifier or macro name.
+
+  The preprocessor treats all characters as significant.  The C standard
+  requires only that the first 63 be significant.
+
+* Number of macros simultaneously defined in a single translation unit.
+
+  The standard requires at least 4095 be possible.  CPP is limited only
+  by available memory.
+
+* Number of parameters in a macro definition and arguments in a macro call.
+
+  We allow ``USHRT_MAX``, which is no smaller than 65,535.  The minimum
+  required by the standard is 127.
+
+* Number of characters on a logical source line.
+
+  The C standard requires a minimum of 4096 be permitted.  CPP places
+  no limits on this, but you may get incorrect column numbers reported in
+  diagnostics for lines longer than 65,535 characters.
+
+* Maximum size of a source file.
+
+  The standard does not specify any lower limit on the maximum size of a
+  source file.  GNU cpp maps files into memory, so it is limited by the
+  available address space.  This is generally at least two gigabytes.
+  Depending on the operating system, the size of physical memory may or
+  may not be a limitation.
\ No newline at end of file
diff --git a/gcc/doc/cpp/index.rst b/gcc/doc/cpp/index.rst
new file mode 100644
index 00000000000..e19dfba42a6
--- /dev/null
+++ b/gcc/doc/cpp/index.rst
@@ -0,0 +1,35 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The C Preprocessor
+==================
+
+The C preprocessor implements the macro language used to transform C,
+C++, and Objective-C programs before they are compiled.  It can also be
+useful on its own.
+
+.. only:: html
+
+  Contents:
+
+.. toctree::
+
+  copyright
+  overview
+  header-files
+  macros
+  conditionals
+  diagnostics
+  line-control
+  pragmas
+  other-directives
+  preprocessor-output
+  traditional-mode
+  implementation-details
+  invocation
+  environment-variables
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/doc/cpp/indices-and-tables.rst b/gcc/doc/cpp/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/doc/cpp/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/initial-processing.rst b/gcc/doc/cpp/initial-processing.rst
new file mode 100644
index 00000000000..9ca96f21428
--- /dev/null
+++ b/gcc/doc/cpp/initial-processing.rst
@@ -0,0 +1,164 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _initial-processing:
+
+Initial processing
+******************
+
+The preprocessor performs a series of textual transformations on its
+input.  These happen before all other processing.  Conceptually, they
+happen in a rigid order, and the entire file is run through each
+transformation before the next one begins.  CPP actually does them
+all at once, for performance reasons.  These transformations correspond
+roughly to the first three 'phases of translation' described in the C
+standard.
+
+.. index:: line endings
+
+* The input file is read into memory and broken into lines.
+
+  Different systems use different conventions to indicate the end of a
+  line.  GCC accepts the ASCII control sequences LF, CR
+  LF and CR as end-of-line markers.  These are the canonical
+  sequences used by Unix, DOS and VMS, and the classic Mac OS (before
+  OSX) respectively.  You may therefore safely copy source code written
+  on any of those systems to a different one and use it without
+  conversion.  (GCC may lose track of the current line number if a file
+  doesn't consistently use one convention, as sometimes happens when it
+  is edited on computers with different conventions that share a network
+  file system.)
+
+  If the last line of any input file lacks an end-of-line marker, the end
+  of the file is considered to implicitly supply one.  The C standard says
+  that this condition provokes undefined behavior, so GCC will emit a
+  warning message.
+
+.. index:: trigraphs
+
+.. _trigraphs:
+
+* If trigraphs are enabled, they are replaced by their
+  corresponding single characters.  By default GCC ignores trigraphs,
+  but if you request a strictly conforming mode with the :option:`-std`
+  option, or you specify the :option:`-trigraphs` option, then it
+  converts them.
+
+  These are nine three-character sequences, all starting with :samp:`??`,
+  that are defined by ISO C to stand for single characters.  They permit
+  obsolete systems that lack some of C's punctuation to use C.  For
+  example, :samp:`??/` stands for :samp:`\\`, so ``'??/n'`` is a character
+  constant for a newline.
+
+  Trigraphs are not popular and many compilers implement them
+  incorrectly.  Portable code should not rely on trigraphs being either
+  converted or ignored.  With :option:`-Wtrigraphs` GCC will warn you
+  when a trigraph may change the meaning of your program if it were
+  converted.  See :ref:`wtrigraphs`.
+
+  In a string constant, you can prevent a sequence of question marks
+  from being confused with a trigraph by inserting a backslash between
+  the question marks, or by separating the string literal at the
+  trigraph and making use of string literal concatenation.  ``"(??\?)"``
+  is the string :samp:`(???)`, not :samp:`(?]`.  Traditional C compilers
+  do not recognize these idioms.
+
+  The nine trigraphs and their replacements are
+
+  .. code-block::
+
+    Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+    Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+.. index:: continued lines, backslash-newline
+
+* Continued lines are merged into one long line.
+
+  A continued line is a line which ends with a backslash, :samp:`\\`.  The
+  backslash is removed and the following line is joined with the current
+  one.  No space is inserted, so you may split a line anywhere, even in
+  the middle of a word.  (It is generally more readable to split lines
+  only at white space.)
+
+  The trailing backslash on a continued line is commonly referred to as a
+  :dfn:`backslash-newline`.
+
+  If there is white space between a backslash and the end of a line, that
+  is still a continued line.  However, as this is usually the result of an
+  editing mistake, and many compilers will not accept it as a continued
+  line, GCC will warn you about it.
+
+.. index:: comments, line comments, block comments
+
+* All comments are replaced with single spaces.
+
+  There are two kinds of comments.  :dfn:`Block comments` begin with
+  :samp:`/*` and continue until the next :samp:`*/`.  Block comments do not
+  nest:
+
+  .. code-block:: c++
+
+    /* this is /* one comment */ text outside comment
+
+  :dfn:`Line comments` begin with :samp:`//` and continue to the end of the
+  current line.  Line comments do not nest either, but it does not matter,
+  because they would end in the same place anyway.
+
+  .. code-block:: c++
+
+    // this is // one comment
+    text outside comment
+
+It is safe to put line comments inside block comments, or vice versa.
+
+.. code-block:: c++
+
+  /* block comment
+     // contains line comment
+     yet more comment
+   */ outside comment
+
+  // line comment /* contains block comment */
+
+But beware of commenting out one end of a block comment with a line
+comment.
+
+.. code-block::
+
+   // l.c.  /* block comment begins
+      oops! this isn't a comment anymore */
+
+Comments are not recognized within string literals.
+``"/* blah */"`` is the string constant :samp:`/\* blah \*/`, not
+an empty string.
+
+Line comments are not in the 1989 edition of the C standard, but they
+are recognized by GCC as an extension.  In C++ and in the 1999 edition
+of the C standard, they are an official part of the language.
+
+Since these transformations happen before all other processing, you can
+split a line mechanically with backslash-newline anywhere.  You can
+comment out the end of a line.  You can continue a line comment onto the
+next line with backslash-newline.  You can even split :samp:`/*`,
+:samp:`*/`, and :samp:`//` onto multiple lines with backslash-newline.
+For example:
+
+.. code-block::
+
+  /\
+  *
+  */ # /*
+  */ defi\
+  ne FO\
+  O 10\
+  20
+
+is equivalent to ``#define FOO 1020``.  All these tricks are
+extremely confusing and should not be used in code intended to be
+readable.
+
+There is no way to prevent a backslash at the end of a line from being
+interpreted as a backslash-newline.  This cannot affect any correct
+program, however.
\ No newline at end of file
diff --git a/gcc/doc/cpp/invocation.rst b/gcc/doc/cpp/invocation.rst
new file mode 100644
index 00000000000..7b13980af5a
--- /dev/null
+++ b/gcc/doc/cpp/invocation.rst
@@ -0,0 +1,81 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: invocation, command line
+
+.. _invocation:
+
+Invocation
+----------
+
+Most often when you use the C preprocessor you do not have to invoke it
+explicitly: the C compiler does so automatically.  However, the
+preprocessor is sometimes useful on its own.  You can invoke the
+preprocessor either with the :command:`cpp` command, or via :command:`gcc -E`.
+In GCC, the preprocessor is actually integrated with the compiler
+rather than a separate program, and both of these commands invoke
+GCC and tell it to stop after the preprocessing phase.
+
+The :command:`cpp` options listed here are also accepted by
+:command:`gcc` and have the same meaning.  Likewise the :command:`cpp`
+command accepts all the usual :command:`gcc` driver options, although those
+pertaining to compilation phases after preprocessing are ignored.
+
+Only options specific to preprocessing behavior are documented here.
+Refer to the GCC manual for full documentation of other driver options.
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  cpp [ :option:`-D`:samp:`{macro}` [= :samp:`{defn}` ]...] [ :option:`-U`:samp:`{macro}` ]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-iquote`:samp:`{dir}`...]
+      [ :option:`-M` | :option:`-MM` ] [ :option:`-MG` ] [ :option:`-MF` :samp:`{filename}` ]
+      [ :option:`-MP` ] [ :option:`-MQ` :samp:`{target}`...]
+      [ :option:`-MT` :samp:`{target}`...]
+      :samp:`{infile}` [[ :option:`-o` ] :samp:`{outfile}` ]
+
+  Only the most useful options are given above; see below for a more
+  complete list of preprocessor-specific options.
+  In addition, :command:`cpp` accepts most :command:`gcc` driver options, which
+  are not listed here.  Refer to the GCC documentation for details.
+
+Options
+^^^^^^^
+
+The :command:`cpp` command expects two file names as arguments, :samp:`{infile}` and
+:samp:`{outfile}`.  The preprocessor reads :samp:`{infile}` together with any
+other files it specifies with :samp:`#include`.  All the output generated
+by the combined input files is written in :samp:`{outfile}`.
+
+Either :samp:`{infile}` or :samp:`{outfile}` may be :option:`-`, which as
+:samp:`{infile}` means to read from standard input and as :samp:`{outfile}`
+means to write to standard output.  If either file is omitted, it
+means the same as if :option:`-` had been specified for that file.
+You can also use the :option:`-o outfile` option to specify the
+output file.
+
+Unless otherwise noted, or the option ends in :samp:`=`, all options
+which take an argument may have that argument appear either immediately
+after the option, or with a space between option and argument:
+:option:`-Ifoo` and :option:`-I foo` have the same effect.
+
+.. index:: grouping options, options, grouping
+
+Many options have multi-letter names; therefore multiple single-letter
+options may *not* be grouped: :option:`-dM` is very different from
+:samp:`-d -M`.
+
+.. index:: options
+
+.. include:: ../../../doc/cppopts.rst
+
+
+.. include:: ../../../doc/cppdiropts.rst
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/line-control.rst b/gcc/doc/cpp/line-control.rst
new file mode 100644
index 00000000000..933d8a9cf1c
--- /dev/null
+++ b/gcc/doc/cpp/line-control.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: line control
+
+.. _line-control:
+
+Line Control
+------------
+
+The C preprocessor informs the C compiler of the location in your source
+code where each token came from.  Presently, this is just the file name
+and line number.  All the tokens resulting from macro expansion are
+reported as having appeared on the line of the source file where the
+outermost macro was used.  We intend to be more accurate in the future.
+
+If you write a program which generates source code, such as the
+:command:`bison` parser generator, you may want to adjust the preprocessor's
+notion of the current file name and line number by hand.  Parts of the
+output from :command:`bison` are generated from scratch, other parts come
+from a standard parser file.  The rest are copied verbatim from
+:command:`bison`'s input.  You would like compiler error messages and
+symbolic debuggers to be able to refer to ``bison`` 's input file.
+
+.. index:: #line
+
+:command:`bison` or any such program can arrange this by writing
+:samp:`#line` directives into the output file.  :samp:`#line` is a
+directive that specifies the original line number and source file name
+for subsequent input in the current preprocessor input file.
+:samp:`#line` has three variants:
+
+:samp:`#line {linenum}`
+  :samp:`{linenum}` is a non-negative decimal integer constant.  It specifies
+  the line number which should be reported for the following line of
+  input.  Subsequent lines are counted from :samp:`{linenum}`.
+
+:samp:`#line {linenum}{filename}`
+  :samp:`{linenum}` is the same as for the first form, and has the same
+  effect.  In addition, :samp:`{filename}` is a string constant.  The
+  following line and all subsequent lines are reported to come from the
+  file it specifies, until something else happens to change that.
+  :samp:`{filename}` is interpreted according to the normal rules for a string
+  constant: backslash escapes are interpreted.  This is different from
+  :samp:`#include`.
+
+:samp:`#line {anything else}`
+  :samp:`{anything else}` is checked for macro calls, which are expanded.
+  The result should match one of the above two forms.
+
+:samp:`#line` directives alter the results of the ``__FILE__`` and
+``__LINE__`` predefined macros from that point on.  See :ref:`standard-predefined-macros`.  They do not have any effect on :samp:`#include`'s
+idea of the directory containing the current file.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros.rst b/gcc/doc/cpp/macros.rst
new file mode 100644
index 00000000000..7355e0719ef
--- /dev/null
+++ b/gcc/doc/cpp/macros.rst
@@ -0,0 +1,37 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _macros:
+
+Macros
+------
+
+A :dfn:`macro` is a fragment of code which has been given a name.
+Whenever the name is used, it is replaced by the contents of the macro.
+There are two kinds of macros.  They differ mostly in what they look
+like when they are used.  :dfn:`Object-like` macros resemble data objects
+when used, :dfn:`function-like` macros resemble function calls.
+
+You may define any valid identifier as a macro, even if it is a C
+keyword.  The preprocessor does not know anything about keywords.  This
+can be useful if you wish to hide a keyword such as ``const`` from an
+older compiler that does not understand it.  However, the preprocessor
+operator ``defined`` (see :ref:`defined`) can never be defined as a
+macro, and C++'s named operators (see :ref:`c++-named-operators`) cannot be
+macros when you are compiling C++.
+
+.. toctree::
+  :maxdepth: 2
+
+  macros/object-like-macros
+  macros/function-like-macros
+  macros/macro-arguments
+  macros/stringizing
+  macros/concatenation
+  macros/variadic-macros
+  macros/predefined-macros
+  macros/undefining-and-redefining-macros
+  macros/directives-within-macro-arguments
+  macros/macro-pitfalls
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/concatenation.rst b/gcc/doc/cpp/macros/concatenation.rst
new file mode 100644
index 00000000000..2f5066ab65e
--- /dev/null
+++ b/gcc/doc/cpp/macros/concatenation.rst
@@ -0,0 +1,85 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: concatenation, token pasting, token concatenation, ## operator
+
+.. _concatenation:
+
+Concatenation
+*************
+
+It is often useful to merge two tokens into one while expanding macros.
+This is called :dfn:`token pasting` or :dfn:`token concatenation`.  The
+:samp:`##` preprocessing operator performs token pasting.  When a macro
+is expanded, the two tokens on either side of each :samp:`##` operator
+are combined into a single token, which then replaces the :samp:`##` and
+the two original tokens in the macro expansion.  Usually both will be
+identifiers, or one will be an identifier and the other a preprocessing
+number.  When pasted, they make a longer identifier.  This isn't the
+only valid case.  It is also possible to concatenate two numbers (or a
+number and a name, such as ``1.5`` and ``e3``) into a number.
+Also, multi-character operators such as ``+=`` can be formed by
+token pasting.
+
+However, two tokens that don't together form a valid token cannot be
+pasted together.  For example, you cannot concatenate ``x`` with
+``+`` in either order.  If you try, the preprocessor issues a warning
+and emits the two tokens.  Whether it puts white space between the
+tokens is undefined.  It is common to find unnecessary uses of :samp:`##`
+in complex macros.  If you get this warning, it is likely that you can
+simply remove the :samp:`##`.
+
+Both the tokens combined by :samp:`##` could come from the macro body,
+but you could just as well write them as one token in the first place.
+Token pasting is most useful when one or both of the tokens comes from a
+macro argument.  If either of the tokens next to an :samp:`##` is a
+parameter name, it is replaced by its actual argument before :samp:`##`
+executes.  As with stringizing, the actual argument is not
+macro-expanded first.  If the argument is empty, that :samp:`##` has no
+effect.
+
+Keep in mind that the C preprocessor converts comments to whitespace
+before macros are even considered.  Therefore, you cannot create a
+comment by concatenating :samp:`/` and :samp:`*`.  You can put as much
+whitespace between :samp:`##` and its operands as you like, including
+comments, and you can put comments in arguments that will be
+concatenated.  However, it is an error if :samp:`##` appears at either
+end of a macro body.
+
+Consider a C program that interprets named commands.  There probably
+needs to be a table of commands, perhaps an array of structures declared
+as follows:
+
+.. code-block:: c++
+
+  struct command
+  {
+    char *name;
+    void (*function) (void);
+  };
+
+  struct command commands[] =
+  {
+    { "quit", quit_command },
+    { "help", help_command },
+    ...
+  };
+
+It would be cleaner not to have to give each command name twice, once in
+the string constant and once in the function name.  A macro which takes the
+name of a command as an argument can make this unnecessary.  The string
+constant can be created with stringizing, and the function name by
+concatenating the argument with :samp:`_command`.  Here is how it is done:
+
+.. code-block:: c++
+
+  #define COMMAND(NAME)  { #NAME, NAME ## _command }
+
+  struct command commands[] =
+  {
+    COMMAND (quit),
+    COMMAND (help),
+    ...
+  };
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/directives-within-macro-arguments.rst b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
new file mode 100644
index 00000000000..2e7e82563e9
--- /dev/null
+++ b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: macro arguments and directives
+
+.. _directives-within-macro-arguments:
+
+Directives Within Macro Arguments
+*********************************
+
+Occasionally it is convenient to use preprocessor directives within
+the arguments of a macro.  The C and C++ standards declare that
+behavior in these cases is undefined.  GNU CPP
+processes arbitrary directives within macro arguments in
+exactly the same way as it would have processed the directive were the
+function-like macro invocation not present.
+
+If, within a macro invocation, that macro is redefined, then the new
+definition takes effect in time for argument pre-expansion, but the
+original definition is still used for argument replacement.  Here is a
+pathological example:
+
+.. code-block:: c++
+
+  #define f(x) x x
+  f (1
+  #undef f
+  #define f 2
+  f)
+
+which expands to
+
+.. code-block:: c++
+
+  1 2 1 2
+
+with the semantics described above.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/function-like-macros.rst b/gcc/doc/cpp/macros/function-like-macros.rst
new file mode 100644
index 00000000000..16ba2cf1a1a
--- /dev/null
+++ b/gcc/doc/cpp/macros/function-like-macros.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: function-like macros
+
+.. _function-like-macros:
+
+Function-like Macros
+********************
+
+You can also define macros whose use looks like a function call.  These
+are called :dfn:`function-like macros`.  To define a function-like macro,
+you use the same :samp:`#define` directive, but you put a pair of
+parentheses immediately after the macro name.  For example,
+
+.. code-block::
+
+  #define lang_init()  c_init()
+  lang_init()
+       → c_init()
+
+A function-like macro is only expanded if its name appears with a pair
+of parentheses after it.  If you write just the name, it is left alone.
+This can be useful when you have a function and a macro of the same
+name, and you wish to use the function sometimes.
+
+.. code-block::
+
+  extern void foo(void);
+  #define foo() /* optimized inline version */
+  ...
+    foo();
+    funcptr = foo;
+
+Here the call to ``foo()`` will use the macro, but the function
+pointer will get the address of the real function.  If the macro were to
+be expanded, it would cause a syntax error.
+
+If you put spaces between the macro name and the parentheses in the
+macro definition, that does not define a function-like macro, it defines
+an object-like macro whose expansion happens to begin with a pair of
+parentheses.
+
+.. code-block::
+
+  #define lang_init ()    c_init()
+  lang_init()
+       → () c_init()()
+
+The first two pairs of parentheses in this expansion come from the
+macro.  The third is the pair that was originally after the macro
+invocation.  Since ``lang_init`` is an object-like macro, it does not
+consume those parentheses.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-arguments.rst b/gcc/doc/cpp/macros/macro-arguments.rst
new file mode 100644
index 00000000000..06911523e7f
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-arguments.rst
@@ -0,0 +1,112 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: arguments, macros with arguments, arguments in macro definitions
+
+.. _macro-arguments:
+
+Macro Arguments
+***************
+
+Function-like macros can take :dfn:`arguments`, just like true functions.
+To define a macro that uses arguments, you insert :dfn:`parameters`
+between the pair of parentheses in the macro definition that make the
+macro function-like.  The parameters must be valid C identifiers,
+separated by commas and optionally whitespace.
+
+To invoke a macro that takes arguments, you write the name of the macro
+followed by a list of :dfn:`actual arguments` in parentheses, separated
+by commas.  The invocation of the macro need not be restricted to a
+single logical line---it can cross as many lines in the source file as
+you wish.  The number of arguments you give must match the number of
+parameters in the macro definition.  When the macro is expanded, each
+use of a parameter in its body is replaced by the tokens of the
+corresponding argument.  (You need not use all of the parameters in the
+macro body.)
+
+As an example, here is a macro that computes the minimum of two numeric
+values, as it is defined in many C programs, and some uses.
+
+.. code-block::
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+    x = min(a, b);          →  x = ((a) < (b) ? (a) : (b));
+    y = min(1, 2);          →  y = ((1) < (2) ? (1) : (2));
+    z = min(a + 28, *p);    →  z = ((a + 28) < (*p) ? (a + 28) : (*p));
+
+(In this small example you can already see several of the dangers of
+macro arguments.  See :ref:`macro-pitfalls`, for detailed explanations.)
+
+Leading and trailing whitespace in each argument is dropped, and all
+whitespace between the tokens of an argument is reduced to a single
+space.  Parentheses within each argument must balance; a comma within
+such parentheses does not end the argument.  However, there is no
+requirement for square brackets or braces to balance, and they do not
+prevent a comma from separating arguments.  Thus,
+
+.. code-block:: c++
+
+  macro (array[x = y, x + 1])
+
+passes two arguments to ``macro`` : ``array[x = y`` and ``x +
+1]``.  If you want to supply ``array[x = y, x + 1]`` as an argument,
+you can write it as ``array[(x = y, x + 1)]``, which is equivalent C
+code.
+
+All arguments to a macro are completely macro-expanded before they are
+substituted into the macro body.  After substitution, the complete text
+is scanned again for macros to expand, including the arguments.  This rule
+may seem strange, but it is carefully designed so you need not worry
+about whether any function call is actually a macro invocation.  You can
+run into trouble if you try to be too clever, though.  See :ref:`argument-prescan`, for detailed discussion.
+
+For example, ``min (min (a, b), c)`` is first expanded to
+
+.. code-block:: c++
+
+    min (((a) < (b) ? (a) : (b)), (c))
+
+and then to
+
+.. code-block:: c++
+
+  ((((a) < (b) ? (a) : (b))) < (c)
+   ? (((a) < (b) ? (a) : (b)))
+   : (c))
+
+(Line breaks shown here for clarity would not actually be generated.)
+
+.. index:: empty macro arguments
+
+You can leave macro arguments empty; this is not an error to the
+preprocessor (but many macros will then expand to invalid code).
+You cannot leave out arguments entirely; if a macro takes two arguments,
+there must be exactly one comma at the top level of its argument list.
+Here are some silly examples using ``min`` :
+
+.. code-block::
+
+  min(, b)        → ((   ) < (b) ? (   ) : (b))
+  min(a, )        → ((a  ) < ( ) ? (a  ) : ( ))
+  min(,)          → ((   ) < ( ) ? (   ) : ( ))
+  min((,),)       → (((,)) < ( ) ? ((,)) : ( ))
+
+  min()      error macro "min" requires 2 arguments, but only 1 given
+  min(,,)    error macro "min" passed 3 arguments, but takes just 2
+
+Whitespace is not a preprocessing token, so if a macro ``foo`` takes
+one argument, ``foo ()`` and ``foo ( )`` both supply it an
+empty argument.  Previous GNU preprocessor implementations and
+documentation were incorrect on this point, insisting that a
+function-like macro that takes a single argument be passed a space if an
+empty argument was required.
+
+Macro parameters appearing inside string literals are not replaced by
+their corresponding actual arguments.
+
+.. code-block::
+
+  #define foo(x) x, "x"
+  foo(bar)        → bar, "x"
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-pitfalls.rst b/gcc/doc/cpp/macros/macro-pitfalls.rst
new file mode 100644
index 00000000000..0be22954a76
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-pitfalls.rst
@@ -0,0 +1,449 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: problems with macros, pitfalls of macros
+
+.. _macro-pitfalls:
+
+Macro Pitfalls
+**************
+
+In this section we describe some special rules that apply to macros and
+macro expansion, and point out certain cases in which the rules have
+counter-intuitive consequences that you must watch out for.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. _misnesting:
+
+Misnesting
+^^^^^^^^^^
+
+When a macro is called with arguments, the arguments are substituted
+into the macro body and the result is checked, together with the rest of
+the input file, for more macro calls.  It is possible to piece together
+a macro call coming partially from the macro body and partially from the
+arguments.  For example,
+
+.. code-block::
+
+  #define twice(x) (2*(x))
+  #define call_with_1(x) x(1)
+  call_with_1 (twice)
+       → twice(1)
+       → (2*(1))
+
+Macro definitions do not have to have balanced parentheses.  By writing
+an unbalanced open parenthesis in a macro body, it is possible to create
+a macro call that begins inside the macro body but ends outside of it.
+For example,
+
+.. code-block::
+
+  #define strange(file) fprintf (file, "%s %d",
+  ...
+  strange(stderr) p, 35)
+       → fprintf (stderr, "%s %d", p, 35)
+
+The ability to piece together a macro call can be useful, but the use of
+unbalanced open parentheses in a macro body is just confusing, and
+should be avoided.
+
+.. index:: parentheses in macro bodies
+
+.. _operator-precedence-problems:
+
+Operator Precedence Problems
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You may have noticed that in most of the macro definition examples shown
+above, each occurrence of a macro argument name had parentheses around
+it.  In addition, another pair of parentheses usually surround the
+entire macro definition.  Here is why it is best to write macros that
+way.
+
+Suppose you define a macro as follows,
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (x + y - 1) / y
+
+whose purpose is to divide, rounding up.  (One use for this operation is
+to compute how many ``int`` objects are needed to hold a certain
+number of ``char`` objects.)  Then suppose it is used as follows:
+
+.. code-block::
+
+  a = ceil_div (b & c, sizeof (int));
+       → a = (b & c + sizeof (int) - 1) / sizeof (int);
+
+This does not do what is intended.  The operator-precedence rules of
+C make it equivalent to this:
+
+.. code-block:: c++
+
+  a = (b & (c + sizeof (int) - 1)) / sizeof (int);
+
+What we want is this:
+
+.. code-block:: c++
+
+  a = ((b & c) + sizeof (int) - 1)) / sizeof (int);
+
+Defining the macro as
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) ((x) + (y) - 1) / (y)
+
+provides the desired result.
+
+Unintended grouping can result in another way.  Consider ``sizeof
+ceil_div(1, 2)``.  That has the appearance of a C expression that would
+compute the size of the type of ``ceil_div (1, 2)``, but in fact it
+means something very different.  Here is what it expands to:
+
+.. code-block:: c++
+
+  sizeof ((1) + (2) - 1) / (2)
+
+This would take the size of an integer and divide it by two.  The
+precedence rules have put the division outside the ``sizeof`` when it
+was intended to be inside.
+
+Parentheses around the entire macro definition prevent such problems.
+Here, then, is the recommended way to define ``ceil_div`` :
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (((x) + (y) - 1) / (y))
+
+.. index:: semicolons (after macro calls)
+
+.. _swallowing-the-semicolon:
+
+Swallowing the Semicolon
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+Often it is desirable to define a macro that expands into a compound
+statement.  Consider, for example, the following macro, that advances a
+pointer (the argument ``p`` says where to find it) across whitespace
+characters:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)  \
+  { char *lim = (limit);         \
+    while (p < lim) {            \
+      if (*p++ != ' ') {         \
+        p--; break; }}}
+
+Here backslash-newline is used to split the macro definition, which must
+be a single logical line, so that it resembles the way such code would
+be laid out if not part of a macro definition.
+
+A call to this macro might be ``SKIP_SPACES (p, lim)``.  Strictly
+speaking, the call expands to a compound statement, which is a complete
+statement with no need for a semicolon to end it.  However, since it
+looks like a function call, it minimizes confusion if you can use it
+like a function call, writing a semicolon afterward, as in
+``SKIP_SPACES (p, lim);``
+
+This can cause trouble before ``else`` statements, because the
+semicolon is actually a null statement.  Suppose you write
+
+.. code-block:: c++
+
+  if (*p != 0)
+    SKIP_SPACES (p, lim);
+  else ...
+
+The presence of two statements---the compound statement and a null
+statement---in between the ``if`` condition and the ``else``
+makes invalid C code.
+
+The definition of the macro ``SKIP_SPACES`` can be altered to solve
+this problem, using a ``do ... while`` statement.  Here is how:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)     \
+  do { char *lim = (limit);         \
+       while (p < lim) {            \
+         if (*p++ != ' ') {         \
+           p--; break; }}}          \
+  while (0)
+
+Now ``SKIP_SPACES (p, lim);`` expands into
+
+.. code-block:: c++
+
+  do {...} while (0);
+
+which is one statement.  The loop executes exactly once; most compilers
+generate no extra code for it.
+
+.. index:: side effects (in macro arguments), unsafe macros
+
+.. _duplication-of-side-effects:
+
+Duplication of Side Effects
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Many C programs define a macro ``min``, for 'minimum', like this:
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+
+When you use this macro with an argument containing a side effect,
+as shown here,
+
+.. code-block:: c++
+
+  next = min (x + y, foo (z));
+
+it expands as follows:
+
+.. code-block:: c++
+
+  next = ((x + y) < (foo (z)) ? (x + y) : (foo (z)));
+
+where ``x + y`` has been substituted for ``X`` and ``foo (z)``
+for ``Y``.
+
+The function ``foo`` is used only once in the statement as it appears
+in the program, but the expression ``foo (z)`` has been substituted
+twice into the macro expansion.  As a result, ``foo`` might be called
+two times when the statement is executed.  If it has side effects or if
+it takes a long time to compute, the results might not be what you
+intended.  We say that ``min`` is an :dfn:`unsafe` macro.
+
+The best solution to this problem is to define ``min`` in a way that
+computes the value of ``foo (z)`` only once.  The C language offers
+no standard way to do this, but it can be done with GNU extensions as
+follows:
+
+.. code-block:: c++
+
+  #define min(X, Y)                \
+  ({ typeof (X) x_ = (X);          \
+     typeof (Y) y_ = (Y);          \
+     (x_ < y_) ? x_ : y_; })
+
+The :samp:`({ ... })` notation produces a compound statement that
+acts as an expression.  Its value is the value of its last statement.
+This permits us to define local variables and assign each argument to
+one.  The local variables have underscores after their names to reduce
+the risk of conflict with an identifier of wider scope (it is impossible
+to avoid this entirely).  Now each argument is evaluated exactly once.
+
+If you do not wish to use GNU C extensions, the only solution is to be
+careful when *using* the macro ``min``.  For example, you can
+calculate the value of ``foo (z)``, save it in a variable, and use
+that variable in ``min`` :
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+  ...
+  {
+    int tem = foo (z);
+    next = min (x + y, tem);
+  }
+
+(where we assume that ``foo`` returns type ``int``).
+
+.. index:: self-reference
+
+.. _self-referential-macros:
+
+Self-Referential Macros
+^^^^^^^^^^^^^^^^^^^^^^^
+
+A :dfn:`self-referential` macro is one whose name appears in its
+definition.  Recall that all macro definitions are rescanned for more
+macros to replace.  If the self-reference were considered a use of the
+macro, it would produce an infinitely large expansion.  To prevent this,
+the self-reference is not considered a macro call.  It is passed into
+the preprocessor output unchanged.  Consider an example:
+
+.. code-block:: c++
+
+  #define foo (4 + foo)
+
+where ``foo`` is also a variable in your program.
+
+Following the ordinary rules, each reference to ``foo`` will expand
+into ``(4 + foo)`` ; then this will be rescanned and will expand into
+``(4 + (4 + foo))`` ; and so on until the computer runs out of memory.
+
+The self-reference rule cuts this process short after one step, at
+``(4 + foo)``.  Therefore, this macro definition has the possibly
+useful effect of causing the program to add 4 to the value of ``foo``
+wherever ``foo`` is referred to.
+
+In most cases, it is a bad idea to take advantage of this feature.  A
+person reading the program who sees that ``foo`` is a variable will
+not expect that it is a macro as well.  The reader will come across the
+identifier ``foo`` in the program and think its value should be that
+of the variable ``foo``, whereas in fact the value is four greater.
+
+One common, useful use of self-reference is to create a macro which
+expands to itself.  If you write
+
+.. code-block:: c++
+
+  #define EPERM EPERM
+
+then the macro ``EPERM`` expands to ``EPERM``.  Effectively, it is
+left alone by the preprocessor whenever it's used in running text.  You
+can tell that it's a macro with :samp:`#ifdef`.  You might do this if you
+want to define numeric constants with an ``enum``, but have
+:samp:`#ifdef` be true for each constant.
+
+If a macro ``x`` expands to use a macro ``y``, and the expansion of
+``y`` refers to the macro ``x``, that is an :dfn:`indirect
+self-reference` of ``x``.  ``x`` is not expanded in this case
+either.  Thus, if we have
+
+.. code-block:: c++
+
+  #define x (4 + y)
+  #define y (2 * x)
+
+then ``x`` and ``y`` expand as follows:
+
+.. code-block::
+
+  x    → (4 + y)
+       → (4 + (2 * x))
+
+  y    → (2 * x)
+       → (2 * (4 + y))
+
+Each macro is expanded when it appears in the definition of the other
+macro, but not when it indirectly appears in its own definition.
+
+.. index:: expansion of arguments, macro argument expansion, prescan of macro arguments
+
+.. _argument-prescan:
+
+Argument Prescan
+^^^^^^^^^^^^^^^^
+
+Macro arguments are completely macro-expanded before they are
+substituted into a macro body, unless they are stringized or pasted
+with other tokens.  After substitution, the entire macro body, including
+the substituted arguments, is scanned again for macros to be expanded.
+The result is that the arguments are scanned *twice* to expand
+macro calls in them.
+
+Most of the time, this has no effect.  If the argument contained any
+macro calls, they are expanded during the first scan.  The result
+therefore contains no macro calls, so the second scan does not change
+it.  If the argument were substituted as given, with no prescan, the
+single remaining scan would find the same macro calls and produce the
+same results.
+
+You might expect the double scan to change the results when a
+self-referential macro is used in an argument of another macro
+(see :ref:`self-referential-macros`): the self-referential macro would be
+expanded once in the first scan, and a second time in the second scan.
+However, this is not what happens.  The self-references that do not
+expand in the first scan are marked so that they will not expand in the
+second scan either.
+
+You might wonder, 'Why mention the prescan, if it makes no difference?
+And why not skip it and make the preprocessor faster?'  The answer is
+that the prescan does make a difference in three special cases:
+
+* Nested calls to a macro.
+
+  We say that :dfn:`nested` calls to a macro occur when a macro's argument
+  contains a call to that very macro.  For example, if ``f`` is a macro
+  that expects one argument, ``f (f (1))`` is a nested pair of calls to
+  ``f``.  The desired expansion is made by expanding ``f (1)`` and
+  substituting that into the definition of ``f``.  The prescan causes
+  the expected result to happen.  Without the prescan, ``f (1)`` itself
+  would be substituted as an argument, and the inner use of ``f`` would
+  appear during the main scan as an indirect self-reference and would not
+  be expanded.
+
+* Macros that call other macros that stringize or concatenate.
+
+  If an argument is stringized or concatenated, the prescan does not
+  occur.  If you *want* to expand a macro, then stringize or
+  concatenate its expansion, you can do that by causing one macro to call
+  another macro that does the stringizing or concatenation.  For
+  instance, if you have
+
+  .. code-block:: c++
+
+    #define AFTERX(x) X_ ## x
+    #define XAFTERX(x) AFTERX(x)
+    #define TABLESIZE 1024
+    #define BUFSIZE TABLESIZE
+
+  then ``AFTERX(BUFSIZE)`` expands to ``X_BUFSIZE``, and
+  ``XAFTERX(BUFSIZE)`` expands to ``X_1024``.  (Not to
+  ``X_TABLESIZE``.  Prescan always does a complete expansion.)
+
+* Macros used in arguments, whose expansions contain unshielded commas.
+
+  This can cause a macro expanded on the second scan to be called with the
+  wrong number of arguments.  Here is an example:
+
+  .. code-block:: c++
+
+    #define foo  a,b
+    #define bar(x) lose(x)
+    #define lose(x) (1 + (x))
+
+  We would like ``bar(foo)`` to turn into ``(1 + (foo))``, which
+  would then turn into ``(1 + (a,b))``.  Instead, ``bar(foo)``
+  expands into ``lose(a,b)``, and you get an error because ``lose``
+  requires a single argument.  In this case, the problem is easily solved
+  by the same parentheses that ought to be used to prevent misnesting of
+  arithmetic operations:
+
+  .. code-block::
+
+    #define foo (a,b)
+    or#define bar(x) lose((x))
+
+  The extra pair of parentheses prevents the comma in ``foo`` 's
+  definition from being interpreted as an argument separator.
+
+.. index:: newlines in macro arguments
+
+.. _newlines-in-arguments:
+
+Newlines in Arguments
+^^^^^^^^^^^^^^^^^^^^^
+
+The invocation of a function-like macro can extend over many logical
+lines.  However, in the present implementation, the entire expansion
+comes out on one line.  Thus line numbers emitted by the compiler or
+debugger refer to the line the invocation started on, which might be
+different to the line containing the argument causing the problem.
+
+Here is an example illustrating this:
+
+.. code-block:: c++
+
+  #define ignore_second_arg(a,b,c) a; c
+
+  ignore_second_arg (foo (),
+                     ignored (),
+                     syntax error);
+
+The syntax error triggered by the tokens ``syntax error`` results in
+an error message citing line three---the line of ignore_second_arg---
+even though the problematic code comes from line five.
+
+We consider this a bug, and intend to fix it in the near future.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/object-like-macros.rst b/gcc/doc/cpp/macros/object-like-macros.rst
new file mode 100644
index 00000000000..c5e6e4cd466
--- /dev/null
+++ b/gcc/doc/cpp/macros/object-like-macros.rst
@@ -0,0 +1,126 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: object-like macro, symbolic constants, manifest constants
+
+.. _object-like-macros:
+
+Object-like Macros
+******************
+
+An :dfn:`object-like macro` is a simple identifier which will be replaced
+by a code fragment.  It is called object-like because it looks like a
+data object in code that uses it.  They are most commonly used to give
+symbolic names to numeric constants.
+
+.. index:: #define
+
+You create macros with the :samp:`#define` directive.  :samp:`#define` is
+followed by the name of the macro and then the token sequence it should
+be an abbreviation for, which is variously referred to as the macro's
+:dfn:`body`, :dfn:`expansion` or :dfn:`replacement list`.  For example,
+
+.. code-block:: c++
+
+  #define BUFFER_SIZE 1024
+
+defines a macro named ``BUFFER_SIZE`` as an abbreviation for the
+token ``1024``.  If somewhere after this :samp:`#define` directive
+there comes a C statement of the form
+
+.. code-block:: c++
+
+  foo = (char *) malloc (BUFFER_SIZE);
+
+then the C preprocessor will recognize and :dfn:`expand` the macro
+``BUFFER_SIZE``.  The C compiler will see the same tokens as it would
+if you had written
+
+.. code-block:: c++
+
+  foo = (char *) malloc (1024);
+
+By convention, macro names are written in uppercase.  Programs are
+easier to read when it is possible to tell at a glance which names are
+macros.
+
+The macro's body ends at the end of the :samp:`#define` line.  You may
+continue the definition onto multiple lines, if necessary, using
+backslash-newline.  When the macro is expanded, however, it will all
+come out on one line.  For example,
+
+.. code-block::
+
+  #define NUMBERS 1, \
+                  2, \
+                  3
+  int x[] = { NUMBERS };
+       → int x[] = { 1, 2, 3 };
+
+The most common visible consequence of this is surprising line numbers
+in error messages.
+
+There is no restriction on what can go in a macro body provided it
+decomposes into valid preprocessing tokens.  Parentheses need not
+balance, and the body need not resemble valid C code.  (If it does not,
+you may get error messages from the C compiler when you use the macro.)
+
+The C preprocessor scans your program sequentially.  Macro definitions
+take effect at the place you write them.  Therefore, the following input
+to the C preprocessor
+
+.. code-block:: c++
+
+  foo = X;
+  #define X 4
+  bar = X;
+
+produces
+
+.. code-block:: c++
+
+  foo = X;
+  bar = 4;
+
+When the preprocessor expands a macro name, the macro's expansion
+replaces the macro invocation, then the expansion is examined for more
+macros to expand.  For example,
+
+.. code-block::
+
+  #define TABLESIZE BUFSIZE
+  #define BUFSIZE 1024
+  TABLESIZE
+       → BUFSIZE
+       → 1024
+
+``TABLESIZE`` is expanded first to produce ``BUFSIZE``, then that
+macro is expanded to produce the final result, ``1024``.
+
+Notice that ``BUFSIZE`` was not defined when ``TABLESIZE`` was
+defined.  The :samp:`#define` for ``TABLESIZE`` uses exactly the
+expansion you specify---in this case, ``BUFSIZE`` ---and does not
+check to see whether it too contains macro names.  Only when you
+*use* ``TABLESIZE`` is the result of its expansion scanned for
+more macro names.
+
+This makes a difference if you change the definition of ``BUFSIZE``
+at some point in the source file.  ``TABLESIZE``, defined as shown,
+will always expand using the definition of ``BUFSIZE`` that is
+currently in effect:
+
+.. code-block:: c++
+
+  #define BUFSIZE 1020
+  #define TABLESIZE BUFSIZE
+  #undef BUFSIZE
+  #define BUFSIZE 37
+
+Now ``TABLESIZE`` expands (in two stages) to ``37``.
+
+If the expansion of a macro contains its own name, either directly or
+via intermediate macros, it is not expanded again when the expansion is
+examined for more macros.  This prevents infinite recursion.
+See :ref:`self-referential-macros`, for the precise details.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/predefined-macros.rst b/gcc/doc/cpp/macros/predefined-macros.rst
new file mode 100644
index 00000000000..8af566e0dc3
--- /dev/null
+++ b/gcc/doc/cpp/macros/predefined-macros.rst
@@ -0,0 +1,874 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: predefined macros
+
+.. _predefined-macros:
+
+Predefined Macros
+*****************
+
+Several object-like macros are predefined; you use them without
+supplying their definitions.  They fall into three classes: standard,
+common, and system-specific.
+
+In C++, there is a fourth category, the named operators.  They act like
+predefined macros, but you cannot undefine them.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: standard predefined macros.
+
+.. _standard-predefined-macros:
+
+Standard Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The standard predefined macros are specified by the relevant
+language standards, so they are available with all compilers that
+implement those standards.  Older compilers may not provide all of
+them.  Their names all start with double underscores.
+
+.. c:macro:: __FILE__
+
+  This macro expands to the name of the current input file, in the form of
+  a C string constant.  This is the path by which the preprocessor opened
+  the file, not the short name specified in :samp:`#include` or as the
+  input file name argument.  For example,
+  ``"/usr/local/include/myheader.h"`` is a possible expansion of this
+  macro.
+
+.. c:macro:: __LINE__
+
+  This macro expands to the current input line number, in the form of a
+  decimal integer constant.  While we call it a predefined macro, it's
+  a pretty strange macro, since its 'definition' changes with each
+  new line of source code.
+
+  ``__FILE__`` and ``__LINE__`` are useful in generating an error
+  message to report an inconsistency detected by the program; the message
+  can state the source line at which the inconsistency was detected.  For
+  example,
+
+.. code-block:: c++
+
+  fprintf (stderr, "Internal error: "
+                   "negative string length "
+                   "%d at %s, line %d.",
+           length, __FILE__, __LINE__);
+
+An :samp:`#include` directive changes the expansions of ``__FILE__``
+and ``__LINE__`` to correspond to the included file.  At the end of
+that file, when processing resumes on the input file that contained
+the :samp:`#include` directive, the expansions of ``__FILE__`` and
+``__LINE__`` revert to the values they had before the
+:samp:`#include` (but ``__LINE__`` is then incremented by one as
+processing moves to the line after the :samp:`#include`).
+
+A :samp:`#line` directive changes ``__LINE__``, and may change
+``__FILE__`` as well.  See :ref:`line-control`.
+
+C99 introduced ``__func__``, and GCC has provided ``__FUNCTION__``
+for a long time.  Both of these are strings containing the name of the
+current function (there are slight semantic differences; see the GCC
+manual).  Neither of them is a macro; the preprocessor does not know the
+name of the current function.  They tend to be useful in conjunction
+with ``__FILE__`` and ``__LINE__``, though.
+
+.. c:macro:: __DATE__
+
+  This macro expands to a string constant that describes the date on which
+  the preprocessor is being run.  The string constant contains eleven
+  characters and looks like ``"Feb 12 1996"``.  If the day of the
+  month is less than 10, it is padded with a space on the left.
+
+  If GCC cannot determine the current date, it will emit a warning message
+  (once per compilation) and ``__DATE__`` will expand to
+  ``"??? ?? ????"``.
+
+.. c:macro:: __TIME__
+
+  This macro expands to a string constant that describes the time at
+  which the preprocessor is being run.  The string constant contains
+  eight characters and looks like ``"23:59:01"``.
+
+  If GCC cannot determine the current time, it will emit a warning message
+  (once per compilation) and ``__TIME__`` will expand to
+  ``"??:??:??"``.
+
+.. c:macro:: __STDC__
+
+  In normal operation, this macro expands to the constant 1, to signify
+  that this compiler conforms to ISO Standard C.  If GNU CPP is used with
+  a compiler other than GCC, this is not necessarily true; however, the
+  preprocessor always conforms to the standard unless the
+  :option:`-traditional-cpp` option is used.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is used.
+
+  On some hosts, the system compiler uses a different convention, where
+  ``__STDC__`` is normally 0, but is 1 if the user specifies strict
+  conformance to the C Standard.  CPP follows the host convention when
+  processing system header files, but when processing user files
+  ``__STDC__`` is always 1.  This has been reported to cause problems;
+  for instance, some versions of Solaris provide X Windows headers that
+  expect ``__STDC__`` to be either undefined or 1.  See :ref:`invocation`.
+
+.. c:macro:: __STDC_VERSION__
+
+  This macro expands to the C Standard's version number, a long integer
+  constant of the form ``yyyymmL`` where :samp:`{yyyy}` and
+  :samp:`{mm}` are the year and month of the Standard version.  This signifies
+  which version of the C Standard the compiler conforms to.  Like
+  ``__STDC__``, this is not necessarily accurate for the entire
+  implementation, unless GNU CPP is being used with GCC.
+
+  The value ``199409L`` signifies the 1989 C standard as amended in
+  1994, which is the current default; the value ``199901L`` signifies
+  the 1999 revision of the C standard; the value ``201112L``
+  signifies the 2011 revision of the C standard; the value
+  ``201710L`` signifies the 2017 revision of the C standard (which is
+  otherwise identical to the 2011 version apart from correction of
+  defects).  An unspecified value larger than ``201710L`` is used for
+  the experimental :option:`-std=c2x` and :option:`-std=gnu2x` modes.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is
+  used, nor when compiling C++ or Objective-C.
+
+.. c:macro:: __STDC_HOSTED__
+
+  This macro is defined, with value 1, if the compiler's target is a
+  :dfn:`hosted environment`.  A hosted environment has the complete
+  facilities of the standard C library available.
+
+.. c:macro:: __cplusplus
+
+  This macro is defined when the C++ compiler is in use.  You can use
+  ``__cplusplus`` to test whether a header is compiled by a C compiler
+  or a C++ compiler.  This macro is similar to ``__STDC_VERSION__``, in
+  that it expands to a version number.  Depending on the language standard
+  selected, the value of the macro is
+  ``199711L`` for the 1998 C++ standard,
+  ``201103L`` for the 2011 C++ standard,
+  ``201402L`` for the 2014 C++ standard,
+  ``201703L`` for the 2017 C++ standard,
+  ``202002L`` for the 2020 C++ standard,
+  or an unspecified value strictly larger than ``202002L`` for the
+  experimental languages enabled by :option:`-std=c++23` and
+  :option:`-std=gnu++23`.
+
+.. c:macro:: __OBJC__
+
+  This macro is defined, with value 1, when the Objective-C compiler is in
+  use.  You can use ``__OBJC__`` to test whether a header is compiled
+  by a C compiler or an Objective-C compiler.
+
+.. c:macro:: __ASSEMBLER__
+
+  This macro is defined with value 1 when preprocessing assembly
+  language.
+
+.. index:: common predefined macros
+
+.. _common-predefined-macros:
+
+Common Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+The common predefined macros are GNU C extensions.  They are available
+with the same meanings regardless of the machine or operating system on
+which you are using GNU C or GNU Fortran.  Their names all start with
+double underscores.
+
+.. c:macro:: __COUNTER__
+
+  This macro expands to sequential integral values starting from 0.  In
+  conjunction with the ``##`` operator, this provides a convenient means to
+  generate unique identifiers.  Care must be taken to ensure that
+  ``__COUNTER__`` is not expanded prior to inclusion of precompiled headers
+  which use it.  Otherwise, the precompiled headers will not be used.
+
+.. c:macro:: __GFORTRAN__
+
+  The GNU Fortran compiler defines this.
+
+.. c:macro:: __GNUC__
+             __GNUC_MINOR__
+             __GNUC_PATCHLEVEL__
+
+  These macros are defined by all GNU compilers that use the C
+  preprocessor: C, C++, Objective-C and Fortran.  Their values are the major
+  version, minor version, and patch level of the compiler, as integer
+  constants.  For example, GCC version :samp:`{x}`. :samp:`{y}`. :samp:`{z}`
+  defines ``__GNUC__`` to :samp:`{x}`, ``__GNUC_MINOR__`` to :samp:`{y}`,
+  and ``__GNUC_PATCHLEVEL__`` to :samp:`{z}`.  These
+  macros are also defined if you invoke the preprocessor directly.
+
+  If all you need to know is whether or not your program is being compiled
+  by GCC, or a non-GCC compiler that claims to accept the GNU C dialects,
+  you can simply test ``__GNUC__``.  If you need to write code
+  which depends on a specific version, you must be more careful.  Each
+  time the minor version is increased, the patch level is reset to zero;
+  each time the major version is increased, the
+  minor version and patch level are reset.  If you wish to use the
+  predefined macros directly in the conditional, you will need to write it
+  like this:
+
+  .. code-block:: c++
+
+    /* Test for GCC > 3.2.0 */
+    #if __GNUC__ > 3 || \
+        (__GNUC__ == 3 && (__GNUC_MINOR__ > 2 || \
+                           (__GNUC_MINOR__ == 2 && \
+                            __GNUC_PATCHLEVEL__ > 0))
+
+  Another approach is to use the predefined macros to
+  calculate a single number, then compare that against a threshold:
+
+  .. code-block:: c++
+
+    #define GCC_VERSION (__GNUC__ * 10000 \
+                         + __GNUC_MINOR__ * 100 \
+                         + __GNUC_PATCHLEVEL__)
+    ...
+    /* Test for GCC > 3.2.0 */
+    #if GCC_VERSION > 30200
+
+  Many people find this form easier to understand.
+
+.. c:macro:: __GNUG__
+
+  The GNU C++ compiler defines this.  Testing it is equivalent to
+  testing ``(__GNUC__ && __cplusplus)``.
+
+.. c:macro:: __STRICT_ANSI__
+
+  GCC defines this macro if and only if the :option:`-ansi` switch, or a
+  :option:`-std` switch specifying strict conformance to some version of ISO C
+  or ISO C++, was specified when GCC was invoked.  It is defined to :samp:`1`.
+  This macro exists primarily to direct GNU libc's header files to use only
+  definitions found in standard C.
+
+.. c:macro:: __BASE_FILE__
+
+  This macro expands to the name of the main input file, in the form
+  of a C string constant.  This is the source file that was specified
+  on the command line of the preprocessor or C compiler.
+
+.. c:macro:: __FILE_NAME__
+
+  This macro expands to the basename of the current input file, in the
+  form of a C string constant.  This is the last path component by which
+  the preprocessor opened the file.  For example, processing
+  ``"/usr/local/include/myheader.h"`` would set this
+  macro to ``"myheader.h"``.
+
+.. c:macro:: __INCLUDE_LEVEL__
+
+  This macro expands to a decimal integer constant that represents the
+  depth of nesting in include files.  The value of this macro is
+  incremented on every :samp:`#include` directive and decremented at the
+  end of every included file.  It starts out at 0, its value within the
+  base file specified on the command line.
+
+.. c:macro:: __ELF__
+
+  This macro is defined if the target uses the ELF object format.
+
+.. c:macro:: __VERSION__
+
+  This macro expands to a string constant which describes the version of
+  the compiler in use.  You should not rely on its contents having any
+  particular form, but it can be counted on to contain at least the
+  release number.
+
+.. c:macro:: __OPTIMIZE__
+             __OPTIMIZE_SIZE__
+             __NO_INLINE__
+
+  These macros describe the compilation mode.  ``__OPTIMIZE__`` is
+  defined in all optimizing compilations.  ``__OPTIMIZE_SIZE__`` is
+  defined if the compiler is optimizing for size, not speed.
+  ``__NO_INLINE__`` is defined if no functions will be inlined into
+  their callers (when not optimizing, or when inlining has been
+  specifically disabled by :option:`-fno-inline`).
+
+  These macros cause certain GNU header files to provide optimized
+  definitions, using macros or inline functions, of system library
+  functions.  You should not use these macros in any way unless you make
+  sure that programs will execute with the same effect whether or not they
+  are defined.  If they are defined, their value is 1.
+
+.. c:macro:: __GNUC_GNU_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled in GCC's traditional gnu90 mode.  Object files will contain
+  externally visible definitions of all functions declared ``inline``
+  without ``extern`` or ``static``.  They will not contain any
+  definitions of any functions declared ``extern inline``.
+
+.. c:macro:: __GNUC_STDC_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled according to the ISO C99 or later standards.  Object files will contain
+  externally visible definitions of all functions declared ``extern
+  inline``.  They will not contain definitions of any functions declared
+  ``inline`` without ``extern``.
+
+  If this macro is defined, GCC supports the ``gnu_inline`` function
+  attribute as a way to always get the gnu90 behavior.
+
+.. c:macro:: __CHAR_UNSIGNED__
+
+  GCC defines this macro if and only if the data type ``char`` is
+  unsigned on the target machine.  It exists to cause the standard header
+  file :samp:`limits.h` to work correctly.  You should not use this macro
+  yourself; instead, refer to the standard macros defined in :samp:`limits.h`.
+
+.. c:macro:: __WCHAR_UNSIGNED__
+
+  Like ``__CHAR_UNSIGNED__``, this macro is defined if and only if the
+  data type ``wchar_t`` is unsigned and the front-end is in C++ mode.
+
+.. c:macro:: __REGISTER_PREFIX__
+
+  This macro expands to a single token (not a string constant) which is
+  the prefix applied to CPU register names in assembly language for this
+  target.  You can use it to write assembly that is usable in multiple
+  environments.  For example, in the ``m68k-aout`` environment it
+  expands to nothing, but in the ``m68k-coff`` environment it expands
+  to a single :samp:`%`.
+
+.. c:macro:: __USER_LABEL_PREFIX__
+
+  This macro expands to a single token which is the prefix applied to
+  user labels (symbols visible to C code) in assembly.  For example, in
+  the ``m68k-aout`` environment it expands to an :samp:`_`, but in the
+  ``m68k-coff`` environment it expands to nothing.
+
+  This macro will have the correct definition even if
+  :option:`-f(no-)underscores` is in use, but it will not be correct if
+  target-specific options that adjust this prefix are used (e.g. the
+  OSF/rose :option:`-mno-underscores` option).
+
+.. c:macro:: __SIZE_TYPE__
+             __PTRDIFF_TYPE__
+             __WCHAR_TYPE__
+             __WINT_TYPE__
+             __INTMAX_TYPE__
+             __UINTMAX_TYPE__
+             __SIG_ATOMIC_TYPE__
+             __INT8_TYPE__
+             __INT16_TYPE__
+             __INT32_TYPE__
+             __INT64_TYPE__
+             __UINT8_TYPE__
+             __UINT16_TYPE__
+             __UINT32_TYPE__
+             __UINT64_TYPE__
+             __INT_LEAST8_TYPE__
+             __INT_LEAST16_TYPE__
+             __INT_LEAST32_TYPE__
+             __INT_LEAST64_TYPE__
+             __UINT_LEAST8_TYPE__
+             __UINT_LEAST16_TYPE__
+             __UINT_LEAST32_TYPE__
+             __UINT_LEAST64_TYPE__
+             __INT_FAST8_TYPE__
+             __INT_FAST16_TYPE__
+             __INT_FAST32_TYPE__
+             __INT_FAST64_TYPE__
+             __UINT_FAST8_TYPE__
+             __UINT_FAST16_TYPE__
+             __UINT_FAST32_TYPE__
+             __UINT_FAST64_TYPE__
+             __INTPTR_TYPE__
+             __UINTPTR_TYPE__
+
+  These macros are defined to the correct underlying types for the
+  ``size_t``, ``ptrdiff_t``, ``wchar_t``, ``wint_t``,
+  ``intmax_t``, ``uintmax_t``, ``sig_atomic_t``, ``int8_t``,
+  ``int16_t``, ``int32_t``, ``int64_t``, ``uint8_t``,
+  ``uint16_t``, ``uint32_t``, ``uint64_t``,
+  ``int_least8_t``, ``int_least16_t``, ``int_least32_t``,
+  ``int_least64_t``, ``uint_least8_t``, ``uint_least16_t``,
+  ``uint_least32_t``, ``uint_least64_t``, ``int_fast8_t``,
+  ``int_fast16_t``, ``int_fast32_t``, ``int_fast64_t``,
+  ``uint_fast8_t``, ``uint_fast16_t``, ``uint_fast32_t``,
+  ``uint_fast64_t``, ``intptr_t``, and ``uintptr_t`` typedefs,
+  respectively.  They exist to make the standard header files
+  :samp:`stddef.h`, :samp:`stdint.h`, and :samp:`wchar.h` work correctly.
+  You should not use these macros directly; instead, include the
+  appropriate headers and use the typedefs.  Some of these macros may
+  not be defined on particular systems if GCC does not provide a
+  :samp:`stdint.h` header on those systems.
+
+.. c:macro:: __CHAR_BIT__
+
+  Defined to the number of bits used in the representation of the
+  ``char`` data type.  It exists to make the standard header given
+  numerical limits work correctly.  You should not use
+  this macro directly; instead, include the appropriate headers.
+
+.. c:macro:: __SCHAR_MAX__
+             __WCHAR_MAX__
+             __SHRT_MAX__
+             __INT_MAX__
+             __LONG_MAX__
+             __LONG_LONG_MAX__
+             __WINT_MAX__
+             __SIZE_MAX__
+             __PTRDIFF_MAX__
+             __INTMAX_MAX[...]

[diff truncated at 524288 bytes]

[gcc(refs/users/marxin/heads/sphinx-final)] sphinx: copy files from texi2rst-generated repository

[Martin Liska]

https://gcc.gnu.org/g:3af87c14b8363ae0f64a942cb6d31857b23ee767

commit 3af87c14b8363ae0f64a942cb6d31857b23ee767
Author: Martin Liska <mliska@suse.cz>
Date:   Mon Nov 7 12:54:13 2022 +0100

    sphinx: copy files from texi2rst-generated repository
    
    ChangeLog:
    
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            * doc/gcc/c-implementation-defined-behavior/hints.rst: New file.
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            * doc/gcc/copyright.rst: New file.
            * doc/gcc/exception-handling.rst: New file.
            * doc/gcc/extensions-to-the-c++-language.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/backwards-compatibility.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/c++-concepts.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/c++-interface-and-implementation-pragmas.rst:
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            * doc/gcc/extensions-to-the-c++-language/c++-specific-variable-function-and-type-attributes.rst:
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            * doc/gcc/extensions-to-the-c++-language/deprecated-features.rst: New file.
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            * doc/gcc/extensions-to-the-c++-language/function-multiversioning.rst: New file.
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            * doc/gcc/extensions-to-the-c++-language/type-traits.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/vague-linkage.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/when-is-a-volatile-c++-object-accessed.rst:
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            * doc/gcc/extensions-to-the-c-language-family/additional-floating-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/alternate-keywords.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/an-inline-function-is-as-fast-as-a-macro.rst:
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            * doc/gcc/extensions-to-the-c-language-family/arithmetic-on-void-and-function-pointers.rst:
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            * doc/gcc/extensions-to-the-c-language-family/arrays-of-variable-length.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/attribute-syntax.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/binary-constants-using-the-0b-prefix.rst:
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            * doc/gcc/extensions-to-the-c-language-family/built-in-functions-to-perform-arithmetic-with-overflow-checking.rst:
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            * doc/gcc/extensions-to-the-c-language-family/c++-style-comments.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/case-ranges.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/cast-to-a-union-type.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/complex-numbers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/compound-literals.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/conditionals-with-omitted-operands.rst:
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            * doc/gcc/extensions-to-the-c-language-family/constructing-function-calls.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/decimal-floating-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/aarch64-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/amd-gcn-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/arc-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/arm-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/avr-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/blackfin-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/bpf-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/c-sky-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/common-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/epiphany-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/h8-300-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/ia-64-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32c-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32r-d-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m68k-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mcore-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mep-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microblaze-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microsoft-windows-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mips-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/msp430-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nds32-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nios-ii-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nvidia-ptx-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/powerpc-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/risc-v-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rl78-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rx-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/s-390-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/sh-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/symbian-os-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/v850-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/visium-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/x86-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/xstormy16-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/designated-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/determining-the-alignment-of-functions-types-or-variables.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/dollar-signs-in-identifier-names.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/double-word-integers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/enumerator-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/fixed-point-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/format-checks-specific-to-particular-target-machines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/function-names-as-strings.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/getting-the-return-or-frame-address-of-a-function.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/half-precision-floating-point.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/hex-floats.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/how-to-use-inline-assembly-language-in-c-code.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/incomplete-enum-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/label-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/labels-as-values.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/legacy-sync-built-in-functions-for-atomic-memory-access.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/locally-declared-labels.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/macros-with-a-variable-number-of-arguments.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/mixed-declarations-labels-and-code.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/named-address-spaces.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/nested-functions.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-constant-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-lvalue-arrays-may-have-subscripts.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/nonlocal-gotos.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/object-size-checking-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/other-built-in-functions-provided-by-gcc.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pointer-arguments-in-variadic-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pointers-to-arrays-with-qualifiers-work-as-expected.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pragmas-accepted-by-gcc.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/prototypes-and-old-style-function-definitions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/referring-to-a-type-with-typeof.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/slightly-looser-rules-for-escaped-newlines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-variables.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/statement-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/statements-and-declarations-in-expressions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/structures-with-no-members.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/support-for-offsetof.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/aarch64-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/alpha-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/altera-nios-ii-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arc-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arc-simd-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-armv8-m-security-extensions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-c-language-extensions-acle.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-floating-point-status-and-control-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-iwmmxt-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/avr-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/basic-powerpc-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/blackfin-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/bpf-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/fr-v-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-dsp-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-loongson-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-paired-single-support.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-simd-architecture-msa-support.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/msp430-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/nds32-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/other-mips-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/picochip-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-altivec-vsx-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-atomic-memory-operation-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-hardware-transactional-memory-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-matrix-multiply-assist-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/pru-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/risc-v-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/rx-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/s-390-system-z-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/sh-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/sparc-vis-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/ti-c6x-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-control-flow-protection-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-transactional-memory-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/the-character-esc-in-constants.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/thread-local-storage.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/unnamed-structure-and-union-fields.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/using-vector-instructions-through-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/when-is-a-volatile-object-accessed.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/x86-specific-memory-model-extensions-for-transactional-memory.rst:
            New file.
            * doc/gcc/funding.rst: New file.
            * doc/gcc/gcc-command-options.rst: New file.
            * doc/gcc/gcc-command-options/c++-modules.rst: New file.
            * doc/gcc/gcc-command-options/compiling-c++-programs.rst: New file.
            * doc/gcc/gcc-command-options/description.rst: New file.
            * doc/gcc/gcc-command-options/environment-variables-affecting-gcc.rst: New file.
            * doc/gcc/gcc-command-options/gcc-developer-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/aarch64-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/adapteva-epiphany-options.rst:
            New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/amd-gcn-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/arc-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/arm-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/avr-mmcu.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/avr-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/blackfin-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/c-sky-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/c6x-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/cris-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/darwin-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/dec-alpha-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/ebpf-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/fr30-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/frv-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/ft32-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/gnu-linux-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/h8-300-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/hppa-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/ia-64-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/ibm-rs-6000-and-powerpc-options.rst:
            New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/lm32-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/loongarch-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/m32c-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/m32r-d-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/m680x0-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mcore-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mep-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/microblaze-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mips-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mmix-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mn10300-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/moxie-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/msp430-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/nds32-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/nios-ii-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/nvidia-ptx-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/openrisc-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/options-for-system-v.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/pdp-11-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/picochip-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/powerpc-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/pru-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/risc-v-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/rl78-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/rx-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/s-390-and-zseries-options.rst:
            New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/score-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/sh-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/solaris-2-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/sparc-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/v850-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/vax-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/visium-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/vms-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/vxworks-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/x86-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/x86-windows-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/xstormy16-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/xtensa-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/zseries-options.rst: New file.
            * doc/gcc/gcc-command-options/option-summary.rst: New file.
            * doc/gcc/gcc-command-options/options-controlling-c++-dialect.rst: New file.
            * doc/gcc/gcc-command-options/options-controlling-c-dialect.rst: New file.
            * doc/gcc/gcc-command-options/options-controlling-objective-c-and-objective-c++-dialects.rst:
            New file.
            * doc/gcc/gcc-command-options/options-controlling-the-kind-of-output.rst: New file.
            * doc/gcc/gcc-command-options/options-controlling-the-preprocessor.rst: New file.
            * doc/gcc/gcc-command-options/options-for-code-generation-conventions.rst: New file.
            * doc/gcc/gcc-command-options/options-for-debugging-your-program.rst: New file.
            * doc/gcc/gcc-command-options/options-for-directory-search.rst: New file.
            * doc/gcc/gcc-command-options/options-for-linking.rst: New file.
            * doc/gcc/gcc-command-options/options-that-control-optimization.rst: New file.
            * doc/gcc/gcc-command-options/options-that-control-static-analysis.rst: New file.
            * doc/gcc/gcc-command-options/options-to-control-diagnostic-messages-formatting.rst:
            New file.
            * doc/gcc/gcc-command-options/options-to-request-or-suppress-warnings.rst: New file.
            * doc/gcc/gcc-command-options/passing-options-to-the-assembler.rst: New file.
            * doc/gcc/gcc-command-options/program-instrumentation-options.rst: New file.
            * doc/gcc/gcc-command-options/specifying-subprocesses-and-the-switches-to-pass-to-them.rst:
            New file.
            * doc/gcc/gcc-command-options/using-precompiled-headers.rst: New file.
            * doc/gcc/gcc.rst: New file.
            * doc/gcc/gcov-dump.rst: New file.
            * doc/gcc/gcov-tool.rst: New file.
            * doc/gcc/gcov.rst: New file.
            * doc/gcc/gcov/brief-description-of-gcov-data-files.rst: New file.
            * doc/gcc/gcov/data-file-relocation-to-support-cross-profiling.rst: New file.
            * doc/gcc/gcov/introduction-to-gcov.rst: New file.
            * doc/gcc/gcov/invoking-gcov.rst: New file.
            * doc/gcc/gcov/profiling-and-test-coverage-in-freestanding-environments.rst: New file.
            * doc/gcc/gcov/using-gcov-with-gcc-optimization.rst: New file.
            * doc/gcc/general-public-license-3.rst: New file.
            * doc/gcc/gnu-free-documentation-license.rst: New file.
            * doc/gcc/gnu-objective-c-features.rst: New file.
            * doc/gcc/gnu-objective-c-features/compatibilityalias.rst: New file.
            * doc/gcc/gnu-objective-c-features/constant-string-objects.rst: New file.
            * doc/gcc/gnu-objective-c-features/exceptions.rst: New file.
            * doc/gcc/gnu-objective-c-features/fast-enumeration.rst: New file.
            * doc/gcc/gnu-objective-c-features/garbage-collection.rst: New file.
            * doc/gcc/gnu-objective-c-features/gnu-objective-c-runtime-api.rst: New file.
            * doc/gcc/gnu-objective-c-features/load-executing-code-before-main.rst: New file.
            * doc/gcc/gnu-objective-c-features/messaging-with-the-gnu-objective-c-runtime.rst: New file.
            * doc/gcc/gnu-objective-c-features/synchronization.rst: New file.
            * doc/gcc/gnu-objective-c-features/type-encoding.rst: New file.
            * doc/gcc/gnu.rst: New file.
            * doc/gcc/have-you-found-a-bug.rst: New file.
            * doc/gcc/how-and-where-to-report-bugs.rst: New file.
            * doc/gcc/how-to-get-help-with-gcc.rst: New file.
            * doc/gcc/index.rst: New file.
            * doc/gcc/indices-and-tables.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/actual-bugs-we-havent-fixed-yet.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/certain-changes-we-dont-want-to-make.rst:
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            * doc/gcc/known-causes-of-trouble-with-gcc/common-misunderstandings-with-gnu-c.rst:
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            * doc/gcc/known-causes-of-trouble-with-gcc/disappointments-and-misunderstandings.rst:
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            * doc/gcc/known-causes-of-trouble-with-gcc/fixed-header-files.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/incompatibilities-of-gcc.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/interoperation.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/standard-libraries.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/warning-messages-and-error-messages.rst:
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            * doc/gcc/language-standards-supported-by-gcc.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/c++-language.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/c-language.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/d-language.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/go-language.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/objective-c-and-objective-c++-languages.rst:
            New file.
            * doc/gcc/language-standards-supported-by-gcc/references-for-other-languages.rst: New file.
            * doc/gcc/lto-dump.rst: New file.
            * doc/gcc/programming-languages-supported-by-gcc.rst: New file.
            * doc/gcc/reporting-bugs.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/alias-analysis.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/annotations.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/memory-model.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/ssa-operands.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/static-single-assignment.rst:
            New file.
            * doc/gccint/analysis-and-representation-of-loops.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/data-dependency-analysis.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/iv-analysis-on-rtl.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/loop-closed-ssa-form.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/loop-manipulation.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/loop-querying.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/loop-representation.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/number-of-iterations-analysis.rst:
            New file.
            * doc/gccint/analysis-and-representation-of-loops/scalar-evolutions.rst: New file.
            * doc/gccint/analyzer-internals.rst: New file.
            * doc/gccint/collect2.rst: New file.
            * doc/gccint/conf.py: New file.
            * doc/gccint/contributing-to-gcc-development.rst: New file.
            * doc/gccint/contributors-to-gcc.rst: New file.
            * doc/gccint/control-flow-graph.rst: New file.
            * doc/gccint/control-flow-graph/basic-blocks.rst: New file.
            * doc/gccint/control-flow-graph/edges.rst: New file.
            * doc/gccint/control-flow-graph/liveness-information.rst: New file.
            * doc/gccint/control-flow-graph/maintaining-the-cfg.rst: New file.
            * doc/gccint/control-flow-graph/profile-information.rst: New file.
            * doc/gccint/copyright.rst: New file.
            * doc/gccint/debugging-the-analyzer.rst: New file.
            * doc/gccint/funding.rst: New file.
            * doc/gccint/gcc-and-portability.rst: New file.
            * doc/gccint/general-public-license-3.rst: New file.
            * doc/gccint/generic.rst: New file.
            * doc/gccint/generic/attributes-in-trees.rst: New file.
            * doc/gccint/generic/c-and-c++-trees.rst: New file.
            * doc/gccint/generic/declarations.rst: New file.
            * doc/gccint/generic/deficiencies.rst: New file.
            * doc/gccint/generic/expressions.rst: New file.
            * doc/gccint/generic/functions.rst: New file.
            * doc/gccint/generic/language-dependent-trees.rst: New file.
            * doc/gccint/generic/overview.rst: New file.
            * doc/gccint/generic/statements.rst: New file.
            * doc/gccint/generic/types.rst: New file.
            * doc/gccint/gimple-api.rst: New file.
            * doc/gccint/gimple.rst: New file.
            * doc/gccint/gimple/adding-a-new-gimple-statement-code.rst: New file.
            * doc/gccint/gimple/class-hierarchy-of-gimple-statements.rst: New file.
            * doc/gccint/gimple/exception-handling.rst: New file.
            * doc/gccint/gimple/gimple-instruction-set.rst: New file.
            * doc/gccint/gimple/gimple-sequences.rst: New file.
            * doc/gccint/gimple/manipulating-gimple-statements.rst: New file.
            * doc/gccint/gimple/operands.rst: New file.
            * doc/gccint/gimple/sequence-iterators.rst: New file.
            * doc/gccint/gimple/statement-and-operand-traversals.rst: New file.
            * doc/gccint/gimple/temporaries.rst: New file.
            * doc/gccint/gimple/tuple-representation.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleasm.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleassign.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplebind.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplecall.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplecatch.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplecond.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpledebug.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleehfilter.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplegoto.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplelabel.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplenop.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompatomicload.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompatomicstore.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompcontinue.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompcritical.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompfor.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompmaster.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompordered.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompparallel.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompreturn.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompsection.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompsections.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompsingle.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplephi.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleresx.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplereturn.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleswitch.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpletry.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplewithcleanupexpr.rst: New file.
            * doc/gccint/gnu-free-documentation-license.rst: New file.
            * doc/gccint/guidelines-for-diagnostics.rst: New file.
            * doc/gccint/guidelines-for-options.rst: New file.
            * doc/gccint/host-common.rst: New file.
            * doc/gccint/host-configuration.rst: New file.
            * doc/gccint/host-filesystem.rst: New file.
            * doc/gccint/host-makefile-fragments.rst: New file.
            * doc/gccint/host-misc.rst: New file.
            * doc/gccint/index.rst: New file.
            * doc/gccint/indices-and-tables.rst: New file.
            * doc/gccint/interfacing-to-gcc-output.rst: New file.
            * doc/gccint/introduction.rst: New file.
            * doc/gccint/language-front-ends-in-gcc.rst: New file.
            * doc/gccint/link-time-optimization.rst: New file.
            * doc/gccint/link-time-optimization/design-overview.rst: New file.
            * doc/gccint/link-time-optimization/internal-flags-controlling-lto1.rst: New file.
            * doc/gccint/link-time-optimization/lto-file-sections.rst: New file.
            * doc/gccint/link-time-optimization/using-summary-information-in-ipa-passes.rst: New file.
            * doc/gccint/link-time-optimization/whole-program-assumptions-linker-plugin-and-symbol-visibilities.rst:
            New file.
            * doc/gccint/machine-descriptions.rst: New file.
            * doc/gccint/machine-descriptions/c-statements-for-assembler-output.rst: New file.
            * doc/gccint/machine-descriptions/canonicalization-of-instructions.rst: New file.
            * doc/gccint/machine-descriptions/conditional-execution.rst: New file.
            * doc/gccint/machine-descriptions/constant-definitions.rst: New file.
            * doc/gccint/machine-descriptions/defining-how-to-split-instructions.rst: New file.
            * doc/gccint/machine-descriptions/defining-jump-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/defining-looping-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/defining-rtl-sequences-for-code-generation.rst: New file.
            * doc/gccint/machine-descriptions/everything-about-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/example-of-defineinsn.rst: New file.
            * doc/gccint/machine-descriptions/including-patterns-in-machine-descriptions.rst: New file.
            * doc/gccint/machine-descriptions/instruction-attributes.rst: New file.
            * doc/gccint/machine-descriptions/interdependence-of-patterns.rst: New file.
            * doc/gccint/machine-descriptions/iterators.rst: New file.
            * doc/gccint/machine-descriptions/machine-specific-peephole-optimizers.rst: New file.
            * doc/gccint/machine-descriptions/operand-constraints.rst: New file.
            * doc/gccint/machine-descriptions/output-templates-and-operand-substitution.rst: New file.
            * doc/gccint/machine-descriptions/overview-of-how-the-machine-description-is-used.rst:
            New file.
            * doc/gccint/machine-descriptions/predicates.rst: New file.
            * doc/gccint/machine-descriptions/rtl-template.rst: New file.
            * doc/gccint/machine-descriptions/rtl-templates-transformations.rst: New file.
            * doc/gccint/machine-descriptions/standard-pattern-names-for-generation.rst: New file.
            * doc/gccint/machine-descriptions/when-the-order-of-patterns-matters.rst: New file.
            * doc/gccint/makefile-fragments.rst: New file.
            * doc/gccint/match-and-simplify.rst: New file.
            * doc/gccint/memory-management-and-type-information.rst: New file.
            * doc/gccint/memory-management-and-type-information/how-to-invoke-the-garbage-collector.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/marking-roots-for-the-garbage-collector.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/source-files-containing-type-information.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/support-for-inheritance.rst: New file.
            * doc/gccint/memory-management-and-type-information/support-for-user-provided-gc-marking-routines.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/the-inside-of-a-gty.rst: New file.
            * doc/gccint/memory-management-and-type-information/troubleshooting-the-garbage-collector.rst:
            New file.
            * doc/gccint/option-file-format.rst: New file.
            * doc/gccint/option-properties.rst: New file.
            * doc/gccint/option-specification-files.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/gimplification-pass.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/inter-procedural-optimization-passes.rst:
            New file.
            * doc/gccint/passes-and-files-of-the-compiler/optimization-info.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/parsing-pass.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/pass-manager.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/rtl-passes.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/tree-ssa-passes.rst: New file.
            * doc/gccint/plugins.rst: New file.
            * doc/gccint/plugins/building-gcc-plugins.rst: New file.
            * doc/gccint/plugins/controlling-which-passes-are-being-run.rst: New file.
            * doc/gccint/plugins/giving-information-about-a-plugin.rst: New file.
            * doc/gccint/plugins/interacting-with-the-gcc-garbage-collector.rst: New file.
            * doc/gccint/plugins/interacting-with-the-pass-manager.rst: New file.
            * doc/gccint/plugins/keeping-track-of-available-passes.rst: New file.
            * doc/gccint/plugins/loading-plugins.rst: New file.
            * doc/gccint/plugins/plugin-api.rst: New file.
            * doc/gccint/plugins/recording-information-about-pass-execution.rst: New file.
            * doc/gccint/plugins/registering-custom-attributes-or-pragmas.rst: New file.
            * doc/gccint/rtl-representation.rst: New file.
            * doc/gccint/rtl-representation/access-to-operands.rst: New file.
            * doc/gccint/rtl-representation/access-to-special-operands.rst: New file.
            * doc/gccint/rtl-representation/assembler-instructions-as-expressions.rst: New file.
            * doc/gccint/rtl-representation/bit-fields.rst: New file.
            * doc/gccint/rtl-representation/comparison-operations.rst: New file.
            * doc/gccint/rtl-representation/constant-expression-types.rst: New file.
            * doc/gccint/rtl-representation/conversions.rst: New file.
            * doc/gccint/rtl-representation/declarations.rst: New file.
            * doc/gccint/rtl-representation/embedded-side-effects-on-addresses.rst: New file.
            * doc/gccint/rtl-representation/flags-in-an-rtl-expression.rst: New file.
            * doc/gccint/rtl-representation/insns.rst: New file.
            * doc/gccint/rtl-representation/machine-modes.rst: New file.
            * doc/gccint/rtl-representation/on-the-side-ssa-form-for-rtl.rst: New file.
            * doc/gccint/rtl-representation/reading-rtl.rst: New file.
            * doc/gccint/rtl-representation/registers-and-memory.rst: New file.
            * doc/gccint/rtl-representation/rtl-classes-and-formats.rst: New file.
            * doc/gccint/rtl-representation/rtl-expressions-for-arithmetic.rst: New file.
            * doc/gccint/rtl-representation/rtl-object-types.rst: New file.
            * doc/gccint/rtl-representation/rtl-representation-of-function-call-insns.rst: New file.
            * doc/gccint/rtl-representation/side-effect-expressions.rst: New file.
            * doc/gccint/rtl-representation/structure-sharing-assumptions.rst: New file.
            * doc/gccint/rtl-representation/variable-location-debug-information-in-rtl.rst: New file.
            * doc/gccint/rtl-representation/vector-operations.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/alignment-of-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/arithmetic-on-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/comparisons-involving-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/computing-bounds-on-polyints.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/consequences-of-using-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/converting-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/guidelines-for-using-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/miscellaneous-polyint-routines.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/overview-of-polyint.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/configure-terms-and-history.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-language-front-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-target-back-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/build-system-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/building-documentation.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/configuration-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/headers-installed-by-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/library-source-files-and-headers-under-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/makefile-targets.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/subdirectories-of-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/top-level-source-directory.rst:
            New file.
            * doc/gccint/standard-header-file-directories.rst: New file.
            * doc/gccint/static-analyzer.rst: New file.
            * doc/gccint/target-macros.rst: New file.
            * doc/gccint/target-macros/adding-support-for-named-address-spaces.rst: New file.
            * doc/gccint/target-macros/addressing-modes.rst: New file.
            * doc/gccint/target-macros/adjusting-the-instruction-scheduler.rst: New file.
            * doc/gccint/target-macros/anchored-addresses.rst: New file.
            * doc/gccint/target-macros/c++-abi-parameters.rst: New file.
            * doc/gccint/target-macros/condition-code-status.rst: New file.
            * doc/gccint/target-macros/controlling-debugging-information-format.rst: New file.
            * doc/gccint/target-macros/controlling-the-compilation-driver-gcc.rst: New file.
            * doc/gccint/target-macros/cross-compilation-and-floating-point.rst: New file.
            * doc/gccint/target-macros/d-abi-parameters.rst: New file.
            * doc/gccint/target-macros/defining-coprocessor-specifics-for-mips-targets.rst: New file.
            * doc/gccint/target-macros/defining-data-structures-for-per-function-information.rst:
            New file.
            * doc/gccint/target-macros/defining-target-specific-uses-of-attribute.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-alignment.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-exception-regions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/how-initialization-functions-are-handled.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/macros-controlling-initialization-routines.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-and-generation-of-labels.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-assembler-instructions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-data.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-dispatch-tables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-uninitialized-variables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/the-overall-framework-of-an-assembler-file.rst:
            New file.
            * doc/gccint/target-macros/describing-relative-costs-of-operations.rst: New file.
            * doc/gccint/target-macros/dividing-the-output-into-sections-texts-data.rst: New file.
            * doc/gccint/target-macros/emulating-tls.rst: New file.
            * doc/gccint/target-macros/implementing-the-varargs-macros.rst: New file.
            * doc/gccint/target-macros/implicit-calls-to-library-routines.rst: New file.
            * doc/gccint/target-macros/layout-of-source-language-data-types.rst: New file.
            * doc/gccint/target-macros/miscellaneous-parameters.rst: New file.
            * doc/gccint/target-macros/mode-switching-instructions.rst: New file.
            * doc/gccint/target-macros/parameters-for-precompiled-header-validity-checking.rst:
            New file.
            * doc/gccint/target-macros/position-independent-code.rst: New file.
            * doc/gccint/target-macros/register-classes.rst: New file.
            * doc/gccint/target-macros/register-usage.rst: New file.
            * doc/gccint/target-macros/run-time-target-specification.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/basic-stack-layout.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/caller-saves-register-allocation.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/eliminating-frame-pointer-and-arg-pointer.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/exception-handling-support.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/function-entry-and-exit.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/generating-code-for-profiling.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-large-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-scalar-function-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/miscellaneous-register-hooks.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-arguments-in-registers.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-function-arguments-on-the-stack.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/permitting-tail-calls.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/registers-that-address-the-stack-frame.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/shrink-wrapping-separate-components.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/specifying-how-stack-checking-is-done.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/stack-smashing-protection.rst:
            New file.
            * doc/gccint/target-macros/storage-layout.rst: New file.
            * doc/gccint/target-macros/support-for-nested-functions.rst: New file.
            * doc/gccint/target-macros/the-global-targetm-variable.rst: New file.
            * doc/gccint/target-makefile-fragments.rst: New file.
            * doc/gccint/testsuites.rst: New test.
            * doc/gccint/testsuites/ada-language-testsuites.rst: New test.
            * doc/gccint/testsuites/c-language-testsuites.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/commands-for-use-in-dg-final.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/features-for-dg-add-options.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/keywords-describing-target-attributes.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/selecting-targets-to-which-a-test-applies.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/syntax-and-descriptions-of-test-directives.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/variants-of-dg-require-support.rst:
            New test.
            * doc/gccint/testsuites/idioms-used-in-testsuite-code.rst: New test.
            * doc/gccint/testsuites/support-for-testing-binary-compatibility.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gcov.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gimple-passes.rst: New test.
            * doc/gccint/testsuites/support-for-testing-link-time-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-profile-directed-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-rtl-passes.rst: New test.
            * doc/gccint/testsuites/support-for-torture-testing-using-multiple-options.rst: New test.
            * doc/gccint/the-gcc-low-level-runtime-library.rst: New file.
            * doc/gccint/the-gcc-low-level-runtime-library/language-independent-routines-for-exception-handling.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/miscellaneous-runtime-library-routines.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-decimal-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-fixed-point-fractional-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-integer-arithmetic.rst:
            New file.
            * doc/gccint/the-language.rst: New file.
            * doc/gccint/user-experience-guidelines.rst: New file.
            * doc/install/binaries.rst: New file.
            * doc/install/building.rst: New file.
            * doc/install/building/building-a-cross-compiler.rst: New file.
            * doc/install/building/building-a-native-compiler.rst: New file.
            * doc/install/building/building-in-parallel.rst: New file.
            * doc/install/building/building-the-ada-compiler.rst: New file.
            * doc/install/building/building-the-d-compiler.rst: New file.
            * doc/install/building/building-with-profile-feedback.rst: New file.
            * doc/install/conf.py: New file.
            * doc/install/configuration.rst: New file.
            * doc/install/copyright.rst: New file.
            * doc/install/downloading-gcc.rst: New file.
            * doc/install/final-installation.rst: New file.
            * doc/install/gnu-free-documentation-license.rst: New file.
            * doc/install/host-target-specific-installation-notes-for-gcc.rst: New file.
            * doc/install/how-can-you-run-the-testsuite-on-selected-tests.rst: New test.
            * doc/install/how-to-interpret-test-results.rst: New file.
            * doc/install/index.rst: New file.
            * doc/install/indices-and-tables.rst: New file.
            * doc/install/installing-gcc.rst: New file.
            * doc/install/passing-options-and-running-multiple-testsuites.rst: New test.
            * doc/install/prerequisites.rst: New file.
            * doc/install/submitting-test-results.rst: New file.
            * doc/install/testing.rst: New file.
    
    gcc/fortran/ChangeLog:
    
            * doc/gfc-internals/code-that-interacts-with-the-user.rst: New file.
            * doc/gfc-internals/command-line-options.rst: New file.
            * doc/gfc-internals/conf.py: New file.
            * doc/gfc-internals/copyright.rst: New file.
            * doc/gfc-internals/error-handling.rst: New file.
            * doc/gfc-internals/frontend-data-structures.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/accessing-declarations.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/basic-data-structures.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/converting-expressions-to-tree.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/translating-statements.rst:
            New file.
            * doc/gfc-internals/gfccode.rst: New file.
            * doc/gfc-internals/gfcexpr.rst: New file.
            * doc/gfc-internals/gnu-free-documentation-license.rst: New file.
            * doc/gfc-internals/index.rst: New file.
            * doc/gfc-internals/indices-and-tables.rst: New file.
            * doc/gfc-internals/internals-of-fortran-2003-oop-features.rst: New file.
            * doc/gfc-internals/introduction.rst: New file.
            * doc/gfc-internals/symbol-versioning.rst: New file.
            * doc/gfc-internals/the-libgfortran-runtime-library.rst: New file.
            * doc/gfc-internals/type-bound-operators.rst: New file.
            * doc/gfc-internals/type-bound-procedures.rst: New file.
            * doc/gfortran/about-gnu-fortran.rst: New file.
            * doc/gfortran/coarray-programming.rst: New file.
            * doc/gfortran/compiler-characteristics.rst: New file.
            * doc/gfortran/compiler-characteristics/asynchronous-i-o.rst: New file.
            * doc/gfortran/compiler-characteristics/data-consistency-and-durability.rst: New file.
            * doc/gfortran/compiler-characteristics/evaluation-of-logical-expressions.rst: New file.
            * doc/gfortran/compiler-characteristics/file-format-of-unformatted-sequential-files.rst:
            New file.
            * doc/gfortran/compiler-characteristics/file-operations-on-symbolic-links.rst: New file.
            * doc/gfortran/compiler-characteristics/files-opened-without-an-explicit-action=-specifier.rst:
            New file.
            * doc/gfortran/compiler-characteristics/internal-representation-of-logical-variables.rst:
            New file.
            * doc/gfortran/compiler-characteristics/kind-type-parameters.rst: New file.
            * doc/gfortran/compiler-characteristics/max-and-min-intrinsics-with-real-nan-arguments.rst:
            New file.
            * doc/gfortran/compiler-characteristics/thread-safety-of-the-runtime-library.rst: New file.
            * doc/gfortran/conf.py: New file.
            * doc/gfortran/contributing.rst: New file.
            * doc/gfortran/contributors-to-gnu-fortran.rst: New file.
            * doc/gfortran/copyright.rst: New file.
            * doc/gfortran/extensions-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions-not-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions.rst: New file.
            * doc/gfortran/function-abi-documentation.rst: New file.
            * doc/gfortran/funding.rst: New file.
            * doc/gfortran/general-public-license-3.rst: New file.
            * doc/gfortran/gnu-fortran-and-gcc.rst: New file.
            * doc/gfortran/gnu-fortran-command-options.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/description.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/enable-and-customize-preprocessing.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/environment-variables-affecting-gfortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-runtime-behavior.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-the-linking-step.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/option-summary.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-controlling-fortran-dialect.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-code-generation-conventions.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-debugging-your-program-or-gnu-fortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-directory-search.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-interoperability-with-other-languages.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-to-request-or-suppress-errors-and-warnings.rst:
            New file.
            * doc/gfortran/gnu-fortran-compiler-directives.rst: New file.
            * doc/gfortran/gnu-free-documentation-license.rst: New file.
            * doc/gfortran/index.rst: New file.
            * doc/gfortran/indices-and-tables.rst: New file.
            * doc/gfortran/interoperability-with-c.rst: New file.
            * doc/gfortran/intrinsic-modules.rst: New file.
            * doc/gfortran/intrinsic-modules/ieee-modules-ieeeexceptions-ieeearithmetic-and-ieeefeatures.rst:
            New file.
            * doc/gfortran/intrinsic-modules/isocbinding.rst: New file.
            * doc/gfortran/intrinsic-modules/isofortranenv.rst: New file.
            * doc/gfortran/intrinsic-modules/openacc-module-openacc.rst: New file.
            * doc/gfortran/intrinsic-modules/openmp-modules-omplib-and-omplibkinds.rst: New file.
            * doc/gfortran/intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/abort.rst: New file.
            * doc/gfortran/intrinsic-procedures/abs.rst: New file.
            * doc/gfortran/intrinsic-procedures/access.rst: New file.
            * doc/gfortran/intrinsic-procedures/achar.rst: New file.
            * doc/gfortran/intrinsic-procedures/acos.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustl.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustr.rst: New file.
            * doc/gfortran/intrinsic-procedures/aimag.rst: New file.
            * doc/gfortran/intrinsic-procedures/aint.rst: New file.
            * doc/gfortran/intrinsic-procedures/alarm.rst: New file.
            * doc/gfortran/intrinsic-procedures/all.rst: New file.
            * doc/gfortran/intrinsic-procedures/allocated.rst: New file.
            * doc/gfortran/intrinsic-procedures/and.rst: New file.
            * doc/gfortran/intrinsic-procedures/anint.rst: New file.
            * doc/gfortran/intrinsic-procedures/any.rst: New file.
            * doc/gfortran/intrinsic-procedures/asin.rst: New file.
            * doc/gfortran/intrinsic-procedures/asind.rst: New file.
            * doc/gfortran/intrinsic-procedures/asinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/associated.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2d.rst: New file.
            * doc/gfortran/intrinsic-procedures/atand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomiccas.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicdefine.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicref.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/backtrace.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj0.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besseljn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely0.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselyn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bge.rst: New file.
            * doc/gfortran/intrinsic-procedures/bgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/bitsize.rst: New file.
            * doc/gfortran/intrinsic-procedures/ble.rst: New file.
            * doc/gfortran/intrinsic-procedures/blt.rst: New file.
            * doc/gfortran/intrinsic-procedures/btest.rst: New file.
            * doc/gfortran/intrinsic-procedures/cassociated.rst: New file.
            * doc/gfortran/intrinsic-procedures/ceiling.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfprocpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfunloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/char.rst: New file.
            * doc/gfortran/intrinsic-procedures/chdir.rst: New file.
            * doc/gfortran/intrinsic-procedures/chmod.rst: New file.
            * doc/gfortran/intrinsic-procedures/cloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/cmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/cobroadcast.rst: New file.
            * doc/gfortran/intrinsic-procedures/comax.rst: New file.
            * doc/gfortran/intrinsic-procedures/comin.rst: New file.
            * doc/gfortran/intrinsic-procedures/commandargumentcount.rst: New file.
            * doc/gfortran/intrinsic-procedures/compileroptions.rst: New file.
            * doc/gfortran/intrinsic-procedures/compilerversion.rst: New file.
            * doc/gfortran/intrinsic-procedures/complex.rst: New file.
            * doc/gfortran/intrinsic-procedures/conjg.rst: New file.
            * doc/gfortran/intrinsic-procedures/coreduce.rst: New file.
            * doc/gfortran/intrinsic-procedures/cos.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosum.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotan.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotand.rst: New file.
            * doc/gfortran/intrinsic-procedures/count.rst: New file.
            * doc/gfortran/intrinsic-procedures/cputime.rst: New file.
            * doc/gfortran/intrinsic-procedures/cshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/csizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/ctime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dateandtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dble.rst: New file.
            * doc/gfortran/intrinsic-procedures/dcmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/digits.rst: New file.
            * doc/gfortran/intrinsic-procedures/dim.rst: New file.
            * doc/gfortran/intrinsic-procedures/dotproduct.rst: New file.
            * doc/gfortran/intrinsic-procedures/dprod.rst: New file.
            * doc/gfortran/intrinsic-procedures/dreal.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/dtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eoshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/epsilon.rst: New file.
            * doc/gfortran/intrinsic-procedures/erf.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfc.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfcscaled.rst: New file.
            * doc/gfortran/intrinsic-procedures/etime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eventquery.rst: New file.
            * doc/gfortran/intrinsic-procedures/executecommandline.rst: New file.
            * doc/gfortran/intrinsic-procedures/exit.rst: New file.
            * doc/gfortran/intrinsic-procedures/exp.rst: New file.
            * doc/gfortran/intrinsic-procedures/exponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/extendstypeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/fdate.rst: New file.
            * doc/gfortran/intrinsic-procedures/fget.rst: New file.
            * doc/gfortran/intrinsic-procedures/fgetc.rst: New file.
            * doc/gfortran/intrinsic-procedures/findloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/floor.rst: New file.
            * doc/gfortran/intrinsic-procedures/flush.rst: New file.
            * doc/gfortran/intrinsic-procedures/fnum.rst: New file.
            * doc/gfortran/intrinsic-procedures/fput.rst: New file.
            * doc/gfortran/intrinsic-procedures/fputc.rst: New file.
            * doc/gfortran/intrinsic-procedures/fraction.rst: New file.
            * doc/gfortran/intrinsic-procedures/free.rst: New file.
            * doc/gfortran/intrinsic-procedures/fseek.rst: New file.
            * doc/gfortran/intrinsic-procedures/fstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ftell.rst: New file.
            * doc/gfortran/intrinsic-procedures/gamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/gerror.rst: New file.
            * doc/gfortran/intrinsic-procedures/getarg.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommand.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommandargument.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcwd.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenv.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenvironmentvariable.rst: New file.
            * doc/gfortran/intrinsic-procedures/getgid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getlog.rst: New file.
            * doc/gfortran/intrinsic-procedures/getpid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getuid.rst: New file.
            * doc/gfortran/intrinsic-procedures/gmtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/hostnm.rst: New file.
            * doc/gfortran/intrinsic-procedures/huge.rst: New file.
            * doc/gfortran/intrinsic-procedures/hypot.rst: New file.
            * doc/gfortran/intrinsic-procedures/iachar.rst: New file.
            * doc/gfortran/intrinsic-procedures/iall.rst: New file.
            * doc/gfortran/intrinsic-procedures/iand.rst: New file.
            * doc/gfortran/intrinsic-procedures/iany.rst: New file.
            * doc/gfortran/intrinsic-procedures/iargc.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibclr.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibits.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibset.rst: New file.
            * doc/gfortran/intrinsic-procedures/ichar.rst: New file.
            * doc/gfortran/intrinsic-procedures/idate.rst: New file.
            * doc/gfortran/intrinsic-procedures/ieor.rst: New file.
            * doc/gfortran/intrinsic-procedures/ierrno.rst: New file.
            * doc/gfortran/intrinsic-procedures/imageindex.rst: New file.
            * doc/gfortran/intrinsic-procedures/index.rst: New file.
            * doc/gfortran/intrinsic-procedures/int.rst: New file.
            * doc/gfortran/intrinsic-procedures/int2.rst: New file.
            * doc/gfortran/intrinsic-procedures/int8.rst: New file.
            * doc/gfortran/intrinsic-procedures/introduction-to-intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/ior.rst: New file.
            * doc/gfortran/intrinsic-procedures/iparity.rst: New file.
            * doc/gfortran/intrinsic-procedures/irand.rst: New file.
            * doc/gfortran/intrinsic-procedures/isatty.rst: New file.
            * doc/gfortran/intrinsic-procedures/iscontiguous.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishft.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishftc.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostatend.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostateor.rst: New file.
            * doc/gfortran/intrinsic-procedures/isnan.rst: New file.
            * doc/gfortran/intrinsic-procedures/itime.rst: New file.
            * doc/gfortran/intrinsic-procedures/kill.rst: New file.
            * doc/gfortran/intrinsic-procedures/kind.rst: New file.
            * doc/gfortran/intrinsic-procedures/lbound.rst: New file.
            * doc/gfortran/intrinsic-procedures/lcobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/leadz.rst: New file.
            * doc/gfortran/intrinsic-procedures/len.rst: New file.
            * doc/gfortran/intrinsic-procedures/lentrim.rst: New file.
            * doc/gfortran/intrinsic-procedures/lge.rst: New file.
            * doc/gfortran/intrinsic-procedures/lgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/link.rst: New file.
            * doc/gfortran/intrinsic-procedures/lle.rst: New file.
            * doc/gfortran/intrinsic-procedures/llt.rst: New file.
            * doc/gfortran/intrinsic-procedures/lnblnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/loc.rst: New file.
            * doc/gfortran/intrinsic-procedures/log.rst: New file.
            * doc/gfortran/intrinsic-procedures/log10.rst: New file.
            * doc/gfortran/intrinsic-procedures/loggamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/logical.rst: New file.
            * doc/gfortran/intrinsic-procedures/lshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/lstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ltime.rst: New file.
            * doc/gfortran/intrinsic-procedures/malloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskl.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskr.rst: New file.
            * doc/gfortran/intrinsic-procedures/matmul.rst: New file.
            * doc/gfortran/intrinsic-procedures/max.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock8.rst: New file.
            * doc/gfortran/intrinsic-procedures/merge.rst: New file.
            * doc/gfortran/intrinsic-procedures/mergebits.rst: New file.
            * doc/gfortran/intrinsic-procedures/min.rst: New file.
            * doc/gfortran/intrinsic-procedures/minexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/minloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/minval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mod.rst: New file.
            * doc/gfortran/intrinsic-procedures/modulo.rst: New file.
            * doc/gfortran/intrinsic-procedures/movealloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/mvbits.rst: New file.
            * doc/gfortran/intrinsic-procedures/nearest.rst: New file.
            * doc/gfortran/intrinsic-procedures/newline.rst: New file.
            * doc/gfortran/intrinsic-procedures/nint.rst: New file.
            * doc/gfortran/intrinsic-procedures/norm2.rst: New file.
            * doc/gfortran/intrinsic-procedures/not.rst: New file.
            * doc/gfortran/intrinsic-procedures/null.rst: New file.
            * doc/gfortran/intrinsic-procedures/numimages.rst: New file.
            * doc/gfortran/intrinsic-procedures/or.rst: New file.
            * doc/gfortran/intrinsic-procedures/pack.rst: New file.
            * doc/gfortran/intrinsic-procedures/parity.rst: New file.
            * doc/gfortran/intrinsic-procedures/perror.rst: New file.
            * doc/gfortran/intrinsic-procedures/popcnt.rst: New file.
            * doc/gfortran/intrinsic-procedures/poppar.rst: New file.
            * doc/gfortran/intrinsic-procedures/precision.rst: New file.
            * doc/gfortran/intrinsic-procedures/present.rst: New file.
            * doc/gfortran/intrinsic-procedures/product.rst: New file.
            * doc/gfortran/intrinsic-procedures/radix.rst: New file.
            * doc/gfortran/intrinsic-procedures/ran.rst: New file.
            * doc/gfortran/intrinsic-procedures/rand.rst: New file.
            * doc/gfortran/intrinsic-procedures/randominit.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomnumber.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomseed.rst: New file.
            * doc/gfortran/intrinsic-procedures/range.rst: New file.
            * doc/gfortran/intrinsic-procedures/rank.rst: New file.
            * doc/gfortran/intrinsic-procedures/real.rst: New file.
            * doc/gfortran/intrinsic-procedures/rename.rst: New file.
            * doc/gfortran/intrinsic-procedures/repeat.rst: New file.
            * doc/gfortran/intrinsic-procedures/reshape.rst: New file.
            * doc/gfortran/intrinsic-procedures/rrspacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/rshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/sametypeas.rst: New file.
            * doc/gfortran/intrinsic-procedures/scale.rst: New file.
            * doc/gfortran/intrinsic-procedures/scan.rst: New file.
            * doc/gfortran/intrinsic-procedures/secnds.rst: New file.
            * doc/gfortran/intrinsic-procedures/second.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedcharkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedintkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedrealkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/setexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/shape.rst: New file.
            * doc/gfortran/intrinsic-procedures/shifta.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/sign.rst: New file.
            * doc/gfortran/intrinsic-procedures/signal.rst: New file.
            * doc/gfortran/intrinsic-procedures/sin.rst: New file.
            * doc/gfortran/intrinsic-procedures/sind.rst: New file.
            * doc/gfortran/intrinsic-procedures/sinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/size.rst: New file.
            * doc/gfortran/intrinsic-procedures/sizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/sleep.rst: New file.
            * doc/gfortran/intrinsic-procedures/spacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/spread.rst: New file.
            * doc/gfortran/intrinsic-procedures/sqrt.rst: New file.
            * doc/gfortran/intrinsic-procedures/srand.rst: New file.
            * doc/gfortran/intrinsic-procedures/stat.rst: New file.
            * doc/gfortran/intrinsic-procedures/storagesize.rst: New file.
            * doc/gfortran/intrinsic-procedures/sum.rst: New file.
            * doc/gfortran/intrinsic-procedures/symlnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/system.rst: New file.
            * doc/gfortran/intrinsic-procedures/systemclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/tan.rst: New file.
            * doc/gfortran/intrinsic-procedures/tand.rst: New file.
            * doc/gfortran/intrinsic-procedures/tanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/thisimage.rst: New file.
            * doc/gfortran/intrinsic-procedures/time.rst: New file.
            * doc/gfortran/intrinsic-procedures/time8.rst: New file.
            * doc/gfortran/intrinsic-procedures/tiny.rst: New file.
            * doc/gfortran/intrinsic-procedures/trailz.rst: New file.
            * doc/gfortran/intrinsic-procedures/transfer.rst: New file.
            * doc/gfortran/intrinsic-procedures/transpose.rst: New file.
            * doc/gfortran/intrinsic-procedures/trim.rst: New file.
            * doc/gfortran/intrinsic-procedures/ttynam.rst: New file.
            * doc/gfortran/intrinsic-procedures/ubound.rst: New file.
            * doc/gfortran/intrinsic-procedures/ucobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/umask.rst: New file.
            * doc/gfortran/intrinsic-procedures/unlink.rst: New file.
            * doc/gfortran/intrinsic-procedures/unpack.rst: New file.
            * doc/gfortran/intrinsic-procedures/verify.rst: New file.
            * doc/gfortran/intrinsic-procedures/xor.rst: New file.
            * doc/gfortran/introduction.rst: New file.
            * doc/gfortran/mixed-language-programming.rst: New file.
            * doc/gfortran/naming-and-argument-passing-conventions.rst: New file.
            * doc/gfortran/non-fortran-main-program.rst: New file.
            * doc/gfortran/projects.rst: New file.
            * doc/gfortran/runtime.rst: New file.
            * doc/gfortran/runtime/gfortranconvertunit.rst: New file.
            * doc/gfortran/runtime/gfortranerrorbacktrace.rst: New file.
            * doc/gfortran/runtime/gfortranformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/gfortranlistseparator.rst: New file.
            * doc/gfortran/runtime/gfortranoptionalplus.rst: New file.
            * doc/gfortran/runtime/gfortranshowlocus.rst: New file.
            * doc/gfortran/runtime/gfortranstderrunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdinunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdoutunit.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedall.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedpreconnected.rst: New file.
            * doc/gfortran/runtime/gfortranunformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/tmpdir.rst: New file.
            * doc/gfortran/standards.rst: New file.
            * doc/gfortran/type-and-enum-abi-documentation.rst: New file.
    
    gcc/go/ChangeLog:
    
            * doc/c-interoperability.rst: New file.
            * doc/c-type-interoperability.rst: New file.
            * doc/compiler-directives.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/function-names.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/import-and-export.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/invoking-gccgo.rst: New file.
    
    libgomp/ChangeLog:
    
            * doc/amd-radeon-gcn.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/cuda-streams-usage.rst: New file.
            * doc/enabling-openacc.rst: New file.
            * doc/enabling-openmp.rst: New file.
            * doc/first-invocation-nvidia-cublas-library-api.rst: New file.
            * doc/first-invocation-openacc-library-api.rst: New file.
            * doc/funding.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/implementation-status-and-implementation-defined-behavior.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/memory-allocation-with-libmemkind.rst: New file.
            * doc/nvptx.rst: New file.
            * doc/offload-target-specifics.rst: New file.
            * doc/openacc-environment-variables.rst: New file.
            * doc/openacc-environment-variables/accdevicenum.rst: New file.
            * doc/openacc-environment-variables/accdevicetype.rst: New file.
            * doc/openacc-environment-variables/accproflib.rst: New file.
            * doc/openacc-environment-variables/gccaccnotify.rst: New file.
            * doc/openacc-introduction.rst: New file.
            * doc/openacc-library-and-environment-variables.rst: New file.
            * doc/openacc-library-interoperability.rst: New file.
            * doc/openacc-profiling-interface.rst: New file.
            * doc/openacc-runtime-library-routines.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctest.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctestall.rst: New file.
            * doc/openacc-runtime-library-routines/accattach.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyin.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyout.rst: New file.
            * doc/openacc-runtime-library-routines/acccreate.rst: New file.
            * doc/openacc-runtime-library-routines/accdelete.rst: New file.
            * doc/openacc-runtime-library-routines/accdetach.rst: New file.
            * doc/openacc-runtime-library-routines/accdeviceptr.rst: New file.
            * doc/openacc-runtime-library-routines/accfree.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudacontext.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudadevice.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accgetnumdevices.rst: New file.
            * doc/openacc-runtime-library-routines/accgetproperty.rst: New file.
            * doc/openacc-runtime-library-routines/acchostptr.rst: New file.
            * doc/openacc-runtime-library-routines/accinit.rst: New file.
            * doc/openacc-runtime-library-routines/accispresent.rst: New file.
            * doc/openacc-runtime-library-routines/accmalloc.rst: New file.
            * doc/openacc-runtime-library-routines/accmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpyfromdevice.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpytodevice.rst: New file.
            * doc/openacc-runtime-library-routines/accondevice.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcopyin.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcreate.rst: New file.
            * doc/openacc-runtime-library-routines/accproflookup.rst: New file.
            * doc/openacc-runtime-library-routines/accprofregister.rst: New file.
            * doc/openacc-runtime-library-routines/accprofunregister.rst: New file.
            * doc/openacc-runtime-library-routines/accregisterlibrary.rst: New file.
            * doc/openacc-runtime-library-routines/accsetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accshutdown.rst: New file.
            * doc/openacc-runtime-library-routines/accunmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accupdatedevice.rst: New file.
            * doc/openacc-runtime-library-routines/accupdateself.rst: New file.
            * doc/openacc-runtime-library-routines/accwait.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitall.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitallasync.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitasync.rst: New file.
            * doc/openmp-context-selectors.rst: New file.
            * doc/openmp-environment-variables.rst: New file.
            * doc/openmp-environment-variables/gompcpuaffinity.rst: New file.
            * doc/openmp-environment-variables/gompdebug.rst: New file.
            * doc/openmp-environment-variables/gomprtemsthreadpools.rst: New file.
            * doc/openmp-environment-variables/gompspincount.rst: New file.
            * doc/openmp-environment-variables/gompstacksize.rst: New file.
            * doc/openmp-environment-variables/ompcancellation.rst: New file.
            * doc/openmp-environment-variables/ompdefaultdevice.rst: New file.
            * doc/openmp-environment-variables/ompdisplayenv.rst: New file.
            * doc/openmp-environment-variables/ompdynamic.rst: New file.
            * doc/openmp-environment-variables/ompmaxactivelevels.rst: New file.
            * doc/openmp-environment-variables/ompmaxtaskpriority.rst: New file.
            * doc/openmp-environment-variables/ompnested.rst: New file.
            * doc/openmp-environment-variables/ompnumteams.rst: New file.
            * doc/openmp-environment-variables/ompnumthreads.rst: New file.
            * doc/openmp-environment-variables/ompplaces.rst: New file.
            * doc/openmp-environment-variables/ompprocbind.rst: New file.
            * doc/openmp-environment-variables/ompschedule.rst: New file.
            * doc/openmp-environment-variables/ompstacksize.rst: New file.
            * doc/openmp-environment-variables/omptargetoffload.rst: New file.
            * doc/openmp-environment-variables/ompteamsthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompwaitpolicy.rst: New file.
            * doc/openmp-implementation-specifics.rst: New file.
            * doc/openmp-implementation-status.rst: New file.
            * doc/openmp-implementation-status/openmp-45.rst: New file.
            * doc/openmp-implementation-status/openmp-50.rst: New file.
            * doc/openmp-implementation-status/openmp-51.rst: New file.
            * doc/openmp-implementation-status/openmp-52.rst: New file.
            * doc/openmp-runtime-library-routines.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroylock.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroynestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompfulfillevent.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetactivelevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetancestorthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetcancellation.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdevicenum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetlevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxtaskpriority.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumdevices.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumprocs.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetprocbind.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetsupportedactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsize.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtick.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtime.rst: New file.
            * doc/openmp-runtime-library-routines/ompinfinal.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinparallel.rst: New file.
            * doc/openmp-runtime-library-routines/ompisinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/omptestlock.rst: New file.
            * doc/openmp-runtime-library-routines/omptestnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetnestlock.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/the-libgomp-abi.rst: New file.
            * doc/the-libgomp-abi/implementing-atomic-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-barrier-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-critical-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-firstprivate-lastprivate-copyin-and-copyprivate-clauses.rst:
            New file.
            * doc/the-libgomp-abi/implementing-flush-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-for-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-master-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-openaccs-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-ordered-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-private-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-reduction-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-sections-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-single-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-threadprivate-construct.rst: New file.
    
    libiberty/ChangeLog:
    
            * doc/bsd.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/extensions.rst: New file.
            * doc/function-variable-and-macro-listing.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/lesser-general-public-license-2.1.rst: New file.
            * doc/overview.rst: New file.
            * doc/replacement-functions.rst: New file.
            * doc/supplemental-functions.rst: New file.
            * doc/using.rst: New file.
    
    libitm/ChangeLog:
    
            * doc/c-c++-language-constructs-for-tm.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/enabling-libitm.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/internals.rst: New file.
            * doc/locking-conventions.rst: New file.
            * doc/nesting-flat-vs-closed.rst: New file.
            * doc/the-libitm-abi.rst: New file.
            * doc/the-libitm-abi/function-list.rst: New file.
            * doc/the-libitm-abi/future-enhancements-to-the-abi.rst: New file.
            * doc/the-libitm-abi/library-design-principles.rst: New file.
            * doc/the-libitm-abi/memory-model.rst: New file.
            * doc/the-libitm-abi/non-objectives.rst: New file.
            * doc/the-libitm-abi/objectives.rst: New file.
            * doc/the-libitm-abi/sample-code.rst: New file.
            * doc/the-libitm-abi/types-and-macros-list.rst: New file.
            * doc/tm-methods-and-method-groups.rst: New file.
    
    libquadmath/ChangeLog:
    
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/i-o-library-routines.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/math-library-routines.rst: New file.
            * doc/quadmathsnprintf.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/strtoflt128.rst: New file.
            * doc/typedef-and-constants.rst: New file.

Diff:
---
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 doc/contribute.rst                                 |   21 +
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 gcc/doc/gcc/have-you-found-a-bug.rst               |   62 +
 gcc/doc/gcc/how-and-where-to-report-bugs.rst       |   13 +
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 .../references-for-other-languages.rst             |   13 +
 gcc/doc/gcc/lto-dump.rst                           |  117 +
 .../gcc/programming-languages-supported-by-gcc.rst |   54 +
 gcc/doc/gcc/reporting-bugs.rst                     |   23 +
 .../analysis-and-optimization-of-gimple-tuples.rst |   44 +
 .../alias-analysis.rst                             |  104 +
 .../annotations.rst                                |   17 +
 .../memory-model.rst                               |   34 +
 .../ssa-operands.rst                               |  388 ++
 .../static-single-assignment.rst                   |  259 ++
 .../analysis-and-representation-of-loops.rst       |   27 +
 .../data-dependency-analysis.rst                   |  135 +
 .../iv-analysis-on-rtl.rst                         |   55 +
 .../loop-closed-ssa-form.rst                       |   47 +
 .../loop-manipulation.rst                          |   58 +
 .../loop-querying.rst                              |   81 +
 .../loop-representation.rst                        |  137 +
 .../number-of-iterations-analysis.rst              |   85 +
 .../scalar-evolutions.rst                          |   71 +
 gcc/doc/gccint/analyzer-internals.rst              |  419 ++
 gcc/doc/gccint/collect2.rst                        |   77 +
 gcc/doc/gccint/conf.py                             |   24 +
 gcc/doc/gccint/contributing-to-gcc-development.rst |    6 +
 gcc/doc/gccint/contributors-to-gcc.rst             |    6 +
 gcc/doc/gccint/control-flow-graph.rst              |   43 +
 gcc/doc/gccint/control-flow-graph/basic-blocks.rst |  141 +
 gcc/doc/gccint/control-flow-graph/edges.rst        |  241 +
 .../control-flow-graph/liveness-information.rst    |   48 +
 .../control-flow-graph/maintaining-the-cfg.rst     |  145 +
 .../control-flow-graph/profile-information.rst     |  112 +
 gcc/doc/gccint/copyright.rst                       |   25 +
 gcc/doc/gccint/debugging-the-analyzer.rst          |  141 +
 gcc/doc/gccint/funding.rst                         |    6 +
 gcc/doc/gccint/gcc-and-portability.rst             |   41 +
 gcc/doc/gccint/general-public-license-3.rst        |    6 +
 gcc/doc/gccint/generic.rst                         |   47 +
 gcc/doc/gccint/generic/attributes-in-trees.rst     |   35 +
 gcc/doc/gccint/generic/c-and-c++-trees.rst         |  886 ++++
 gcc/doc/gccint/generic/declarations.rst            |  346 ++
 gcc/doc/gccint/generic/deficiencies.rst            |   14 +
 gcc/doc/gccint/generic/expressions.rst             |  910 ++++
 gcc/doc/gccint/generic/functions.rst               |  212 +
 .../gccint/generic/language-dependent-trees.rst    |   25 +
 gcc/doc/gccint/generic/overview.rst                |  213 +
 gcc/doc/gccint/generic/statements.rst              |  516 +++
 gcc/doc/gccint/generic/types.rst                   |  299 ++
 gcc/doc/gccint/gimple-api.rst                      |   47 +
 gcc/doc/gccint/gimple.rst                          |   88 +
 .../gimple/adding-a-new-gimple-statement-code.rst  |   36 +
 .../class-hierarchy-of-gimple-statements.rst       |  150 +
 gcc/doc/gccint/gimple/exception-handling.rst       |   46 +
 gcc/doc/gccint/gimple/gimple-instruction-set.rst   |  106 +
 gcc/doc/gccint/gimple/gimple-sequences.rst         |   94 +
 .../gimple/manipulating-gimple-statements.rst      |  176 +
 gcc/doc/gccint/gimple/operands.rst                 |  319 ++
 gcc/doc/gccint/gimple/sequence-iterators.rst       |  223 +
 .../gimple/statement-and-operand-traversals.rst    |   62 +
 gcc/doc/gccint/gimple/temporaries.rst              |   43 +
 gcc/doc/gccint/gimple/tuple-representation.rst     |  242 +
 gcc/doc/gccint/gimple/tuple-specific-accessors.rst |   44 +
 .../gimple/tuple-specific-accessors/gimpleasm.rst  |   66 +
 .../tuple-specific-accessors/gimpleassign.rst      |  126 +
 .../gimple/tuple-specific-accessors/gimplebind.rst |   56 +
 .../gimple/tuple-specific-accessors/gimplecall.rst |  116 +
 .../tuple-specific-accessors/gimplecatch.rst       |   37 +
 .../gimple/tuple-specific-accessors/gimplecond.rst |   80 +
 .../tuple-specific-accessors/gimpledebug.rst       |  106 +
 .../tuple-specific-accessors/gimpleehfilter.rst    |   45 +
 .../gimple/tuple-specific-accessors/gimplegoto.rst |   21 +
 .../tuple-specific-accessors/gimplelabel.rst       |   23 +
 .../gimple/tuple-specific-accessors/gimplenop.rst  |   17 +
 .../gimpleompatomicload.rst                        |   31 +
 .../gimpleompatomicstore.rst                       |   22 +
 .../tuple-specific-accessors/gimpleompcontinue.rst |   43 +
 .../tuple-specific-accessors/gimpleompcritical.rst |   28 +
 .../tuple-specific-accessors/gimpleompfor.rst      |   97 +
 .../tuple-specific-accessors/gimpleompmaster.rst   |   14 +
 .../tuple-specific-accessors/gimpleompordered.rst  |   16 +
 .../tuple-specific-accessors/gimpleompparallel.rst |   76 +
 .../tuple-specific-accessors/gimpleompreturn.rst   |   23 +
 .../tuple-specific-accessors/gimpleompsection.rst  |   24 +
 .../tuple-specific-accessors/gimpleompsections.rst |   48 +
 .../tuple-specific-accessors/gimpleompsingle.rst   |   28 +
 .../gimple/tuple-specific-accessors/gimplephi.rst  |   41 +
 .../gimple/tuple-specific-accessors/gimpleresx.rst |   24 +
 .../tuple-specific-accessors/gimplereturn.rst      |   21 +
 .../tuple-specific-accessors/gimpleswitch.rst      |   52 +
 .../gimple/tuple-specific-accessors/gimpletry.rst  |   51 +
 .../gimplewithcleanupexpr.rst                      |   30 +
 gcc/doc/gccint/gnu-free-documentation-license.rst  |    6 +
 gcc/doc/gccint/guidelines-for-diagnostics.rst      |  598 +++
 gcc/doc/gccint/guidelines-for-options.rst          |   13 +
 gcc/doc/gccint/host-common.rst                     |   57 +
 gcc/doc/gccint/host-configuration.rst              |   32 +
 gcc/doc/gccint/host-filesystem.rst                 |  103 +
 gcc/doc/gccint/host-makefile-fragments.rst         |   14 +
 gcc/doc/gccint/host-misc.rst                       |   70 +
 gcc/doc/gccint/index.rst                           |   51 +
 gcc/doc/gccint/indices-and-tables.rst              |    1 +
 gcc/doc/gccint/interfacing-to-gcc-output.rst       |   71 +
 gcc/doc/gccint/introduction.rst                    |   26 +
 gcc/doc/gccint/language-front-ends-in-gcc.rst      |   39 +
 gcc/doc/gccint/link-time-optimization.rst          |   33 +
 .../link-time-optimization/design-overview.rst     |  123 +
 .../internal-flags-controlling-lto1.rst            |   42 +
 .../link-time-optimization/lto-file-sections.rst   |  110 +
 .../using-summary-information-in-ipa-passes.rst    |  206 +
 ...tions-linker-plugin-and-symbol-visibilities.rst |   91 +
 gcc/doc/gccint/machine-descriptions.rst            |   49 +
 .../c-statements-for-assembler-output.rst          |  122 +
 .../canonicalization-of-instructions.rst           |  152 +
 .../machine-descriptions/conditional-execution.rst |   98 +
 .../machine-descriptions/constant-definitions.rst  |  185 +
 .../defining-how-to-split-instructions.rst         |  374 ++
 .../defining-jump-instruction-patterns.rst         |   37 +
 .../defining-looping-instruction-patterns.rst      |  134 +
 .../defining-rtl-sequences-for-code-generation.rst |  206 +
 .../everything-about-instruction-patterns.rst      |  106 +
 .../machine-descriptions/example-of-defineinsn.rst |   54 +
 .../including-patterns-in-machine-descriptions.rst |   70 +
 .../instruction-attributes.rst                     | 1248 +++++
 .../interdependence-of-patterns.rst                |   43 +
 gcc/doc/gccint/machine-descriptions/iterators.rst  |  543 +++
 .../machine-specific-peephole-optimizers.rst       |  330 ++
 .../machine-descriptions/operand-constraints.rst   |  426 ++
 .../output-templates-and-operand-substitution.rst  |   99 +
 ...view-of-how-the-machine-description-is-used.rst |   47 +
 gcc/doc/gccint/machine-descriptions/predicates.rst |  343 ++
 .../gccint/machine-descriptions/rtl-template.rst   |  255 +
 .../rtl-templates-transformations.rst              |  225 +
 .../standard-pattern-names-for-generation.rst      | 3413 ++++++++++++++
 .../when-the-order-of-patterns-matters.rst         |   29 +
 gcc/doc/gccint/makefile-fragments.rst              |   37 +
 gcc/doc/gccint/match-and-simplify.rst              |   34 +
 .../memory-management-and-type-information.rst     |  103 +
 .../how-to-invoke-the-garbage-collector.rst        |   36 +
 .../marking-roots-for-the-garbage-collector.rst    |   28 +
 .../source-files-containing-type-information.rst   |   60 +
 .../support-for-inheritance.rst                    |   59 +
 ...pport-for-user-provided-gc-marking-routines.rst |  121 +
 .../the-inside-of-a-gty.rst                        |  324 ++
 .../troubleshooting-the-garbage-collector.rst      |   27 +
 gcc/doc/gccint/option-file-format.rst              |  175 +
 gcc/doc/gccint/option-properties.rst               |  376 ++
 gcc/doc/gccint/option-specification-files.rst      |   21 +
 .../gccint/passes-and-files-of-the-compiler.rst    |   27 +
 .../gimplification-pass.rst                        |   44 +
 .../inter-procedural-optimization-passes.rst       |  269 ++
 .../optimization-info.rst                          |  262 ++
 .../parsing-pass.rst                               |   80 +
 .../pass-manager.rst                               |   42 +
 .../rtl-passes.rst                                 |  275 ++
 .../tree-ssa-passes.rst                            |  477 ++
 gcc/doc/gccint/plugins.rst                         |   35 +
 gcc/doc/gccint/plugins/building-gcc-plugins.rst    |   97 +
 .../controlling-which-passes-are-being-run.rst     |   16 +
 .../plugins/giving-information-about-a-plugin.rst  |   24 +
 .../interacting-with-the-gcc-garbage-collector.rst |   37 +
 .../plugins/interacting-with-the-pass-manager.rst  |   57 +
 .../plugins/keeping-track-of-available-passes.rst  |   17 +
 gcc/doc/gccint/plugins/loading-plugins.rst         |   31 +
 gcc/doc/gccint/plugins/plugin-api.rst              |  213 +
 .../recording-information-about-pass-execution.rst |   20 +
 .../registering-custom-attributes-or-pragmas.rst   |   73 +
 gcc/doc/gccint/rtl-representation.rst              |   48 +
 .../rtl-representation/access-to-operands.rst      |   73 +
 .../access-to-special-operands.rst                 |  188 +
 .../assembler-instructions-as-expressions.rst      |   45 +
 gcc/doc/gccint/rtl-representation/bit-fields.rst   |   48 +
 .../rtl-representation/comparison-operations.rst   |  112 +
 .../constant-expression-types.rst                  |  313 ++
 gcc/doc/gccint/rtl-representation/conversions.rst  |  152 +
 gcc/doc/gccint/rtl-representation/declarations.rst |   27 +
 .../embedded-side-effects-on-addresses.rst         |  100 +
 .../flags-in-an-rtl-expression.rst                 |  447 ++
 gcc/doc/gccint/rtl-representation/insns.rst        |  624 +++
 .../gccint/rtl-representation/machine-modes.rst    |  635 +++
 .../on-the-side-ssa-form-for-rtl.rst               |  748 +++
 gcc/doc/gccint/rtl-representation/reading-rtl.rst  |   28 +
 .../rtl-representation/registers-and-memory.rst    |  451 ++
 .../rtl-representation/rtl-classes-and-formats.rst |  192 +
 .../rtl-expressions-for-arithmetic.rst             |  310 ++
 .../gccint/rtl-representation/rtl-object-types.rst |   84 +
 .../rtl-representation-of-function-call-insns.rst  |   72 +
 .../rtl-representation/side-effect-expressions.rst |  374 ++
 .../structure-sharing-assumptions.rst              |   99 +
 .../variable-location-debug-information-in-rtl.rst |   64 +
 .../rtl-representation/vector-operations.rst       |   60 +
 .../sizes-and-offsets-as-runtime-invariants.rst    |   51 +
 .../alignment-of-polyints.rst                      |   84 +
 .../arithmetic-on-polyints.rst                     |  178 +
 .../comparisons-involving-polyint.rst              |  324 ++
 .../computing-bounds-on-polyints.rst               |   34 +
 .../consequences-of-using-polyint.rst              |   55 +
 .../converting-polyints.rst                        |   91 +
 .../guidelines-for-using-polyint.rst               |  119 +
 .../miscellaneous-polyint-routines.rst             |   16 +
 .../overview-of-polyint.rst                        |   78 +
 .../source-tree-structure-and-build-system.rst     |   21 +
 .../configure-terms-and-history.rst                |   64 +
 .../the-gcc-subdirectory.rst                       |   28 +
 .../anatomy-of-a-language-front-end.rst            |  281 ++
 .../anatomy-of-a-target-back-end.rst               |  116 +
 .../build-system-in-the-gcc-directory.rst          |   14 +
 .../building-documentation.rst                     |  247 +
 .../configuration-in-the-gcc-directory.rst         |  127 +
 .../headers-installed-by-gcc.rst                   |   50 +
 ...e-files-and-headers-under-the-gcc-directory.rst |   15 +
 .../the-gcc-subdirectory/makefile-targets.rst      |  195 +
 .../the-gcc-subdirectory/subdirectories-of-gcc.rst |   55 +
 .../top-level-source-directory.rst                 |  135 +
 .../gccint/standard-header-file-directories.rst    |   35 +
 gcc/doc/gccint/static-analyzer.rst                 |   19 +
 gcc/doc/gccint/target-macros.rst                   |   60 +
 .../adding-support-for-named-address-spaces.rst    |  163 +
 gcc/doc/gccint/target-macros/addressing-modes.rst  |  824 ++++
 .../adjusting-the-instruction-scheduler.rst        |  660 +++
 .../gccint/target-macros/anchored-addresses.rst    |   92 +
 .../gccint/target-macros/c++-abi-parameters.rst    |  164 +
 .../gccint/target-macros/condition-code-status.rst |  210 +
 .../controlling-debugging-information-format.rst   |  306 ++
 .../controlling-the-compilation-driver-gcc.rst     |  482 ++
 .../cross-compilation-and-floating-point.rst       |   73 +
 gcc/doc/gccint/target-macros/d-abi-parameters.rst  |  111 +
 ...ning-coprocessor-specifics-for-mips-targets.rst |   35 +
 ...ata-structures-for-per-function-information.rst |   62 +
 .../defining-target-specific-uses-of-attribute.rst |  319 ++
 .../defining-the-output-assembler-language.rst     |   27 +
 .../assembler-commands-for-alignment.rst           |   95 +
 .../assembler-commands-for-exception-regions.rst   |  188 +
 .../how-initialization-functions-are-handled.rst   |  122 +
 .../macros-controlling-initialization-routines.rst |  182 +
 .../output-and-generation-of-labels.rst            |  586 +++
 .../output-of-assembler-instructions.rst           |  252 +
 .../output-of-data.rst                             |  191 +
 .../output-of-dispatch-tables.rst                  |  171 +
 .../output-of-uninitialized-variables.rst          |  105 +
 .../the-overall-framework-of-an-assembler-file.rst |  287 ++
 .../describing-relative-costs-of-operations.rst    |  528 +++
 ...ividing-the-output-into-sections-texts-data.rst |  445 ++
 gcc/doc/gccint/target-macros/emulating-tls.rst     |  125 +
 .../implementing-the-varargs-macros.rst            |  192 +
 .../implicit-calls-to-library-routines.rst         |  141 +
 .../layout-of-source-language-data-types.rst       |  355 ++
 .../target-macros/miscellaneous-parameters.rst     | 1718 +++++++
 .../target-macros/mode-switching-instructions.rst  |  121 +
 ...rs-for-precompiled-header-validity-checking.rst |   63 +
 .../target-macros/position-independent-code.rst    |   53 +
 gcc/doc/gccint/target-macros/register-classes.rst  |  801 ++++
 gcc/doc/gccint/target-macros/register-usage.rst    |  563 +++
 .../run-time-target-specification.rst              |  273 ++
 .../stack-layout-and-calling-conventions.rst       |   35 +
 .../basic-stack-layout.rst                         |  304 ++
 .../caller-saves-register-allocation.rst           |   21 +
 .../eliminating-frame-pointer-and-arg-pointer.rst  |  102 +
 .../exception-handling-support.rst                 |  137 +
 .../function-entry-and-exit.rst                    |  265 ++
 .../generating-code-for-profiling.rst              |   61 +
 .../how-large-values-are-returned.rst              |  132 +
 .../how-scalar-function-values-are-returned.rst    |  166 +
 .../miscellaneous-register-hooks.rst               |   26 +
 .../passing-arguments-in-registers.rst             |  633 +++
 .../passing-function-arguments-on-the-stack.rst    |  193 +
 .../permitting-tail-calls.rst                      |   60 +
 .../registers-that-address-the-stack-frame.rst     |  198 +
 .../shrink-wrapping-separate-components.rst        |   93 +
 .../specifying-how-stack-checking-is-done.rst      |  118 +
 .../stack-smashing-protection.rst                  |   75 +
 gcc/doc/gccint/target-macros/storage-layout.rst    |  729 +++
 .../target-macros/support-for-nested-functions.rst |  222 +
 .../target-macros/the-global-targetm-variable.rst  |   65 +
 gcc/doc/gccint/target-makefile-fragments.rst       |  245 +
 gcc/doc/gccint/testsuites.rst                      |   31 +
 .../gccint/testsuites/ada-language-testsuites.rst  |   38 +
 .../gccint/testsuites/c-language-testsuites.rst    |  113 +
 .../directives-used-within-dejagnu-tests.rst       |   19 +
 .../commands-for-use-in-dg-final.rst               |  291 ++
 .../features-for-dg-add-options.rst                |  122 +
 .../keywords-describing-target-attributes.rst      | 1524 ++++++
 .../selecting-targets-to-which-a-test-applies.rst  |  106 +
 .../syntax-and-descriptions-of-test-directives.rst |  311 ++
 .../variants-of-dg-require-support.rst             |   83 +
 .../testsuites/idioms-used-in-testsuite-code.rst   |   84 +
 .../support-for-testing-binary-compatibility.rst   |  109 +
 .../gccint/testsuites/support-for-testing-gcov.rst |   72 +
 .../support-for-testing-gimple-passes.rst          |   55 +
 ...support-for-testing-link-time-optimizations.rst |   46 +
 ...-for-testing-profile-directed-optimizations.rst |   51 +
 .../testsuites/support-for-testing-rtl-passes.rst  |   48 +
 ...-for-torture-testing-using-multiple-options.rst |   52 +
 .../gccint/the-gcc-low-level-runtime-library.rst   |   50 +
 ...independent-routines-for-exception-handling.rst |   42 +
 .../miscellaneous-runtime-library-routines.rst     |   59 +
 ...utines-for-decimal-floating-point-emulation.rst |  312 ++
 ...utines-for-fixed-point-fractional-emulation.rst | 1432 ++++++
 .../routines-for-floating-point-emulation.rst      |  283 ++
 .../routines-for-integer-arithmetic.rst            |  183 +
 gcc/doc/gccint/the-language.rst                    |  384 ++
 gcc/doc/gccint/user-experience-guidelines.rst      |   30 +
 gcc/doc/install/binaries.rst                       |   54 +
 gcc/doc/install/building.rst                       |   67 +
 .../install/building/building-a-cross-compiler.rst |   74 +
 .../building/building-a-native-compiler.rst        |  191 +
 gcc/doc/install/building/building-in-parallel.rst  |   15 +
 .../install/building/building-the-ada-compiler.rst |    9 +
 .../install/building/building-the-d-compiler.rst   |    9 +
 .../building/building-with-profile-feedback.rst    |   34 +
 gcc/doc/install/conf.py                            |   24 +
 gcc/doc/install/configuration.rst                  | 2098 +++++++++
 gcc/doc/install/copyright.rst                      |   24 +
 gcc/doc/install/downloading-gcc.rst                |   42 +
 gcc/doc/install/final-installation.rst             |  128 +
 gcc/doc/install/gnu-free-documentation-license.rst |    6 +
 ...-target-specific-installation-notes-for-gcc.rst | 1336 ++++++
 ...can-you-run-the-testsuite-on-selected-tests.rst |   46 +
 gcc/doc/install/how-to-interpret-test-results.rst  |   32 +
 gcc/doc/install/index.rst                          |   27 +
 gcc/doc/install/indices-and-tables.rst             |    1 +
 gcc/doc/install/installing-gcc.rst                 |   39 +
 ...ing-options-and-running-multiple-testsuites.rst |   74 +
 gcc/doc/install/prerequisites.rst                  |  319 ++
 gcc/doc/install/submitting-test-results.rst        |   22 +
 gcc/doc/install/testing.rst                        |   69 +
 .../code-that-interacts-with-the-user.rst          |   15 +
 .../doc/gfc-internals/command-line-options.rst     |   30 +
 gcc/fortran/doc/gfc-internals/conf.py              |   24 +
 gcc/fortran/doc/gfc-internals/copyright.rst        |   25 +
 gcc/fortran/doc/gfc-internals/error-handling.rst   |   75 +
 .../doc/gfc-internals/frontend-data-structures.rst |   23 +
 ...-the-intermediate-language-for-later-stages.rst |   24 +
 .../accessing-declarations.rst                     |   16 +
 .../basic-data-structures.rst                      |   67 +
 .../converting-expressions-to-tree.rst             |   48 +
 .../translating-statements.rst                     |   14 +
 gcc/fortran/doc/gfc-internals/gfccode.rst          |  146 +
 gcc/fortran/doc/gfc-internals/gfcexpr.rst          |  156 +
 .../gnu-free-documentation-license.rst             |    6 +
 gcc/fortran/doc/gfc-internals/index.rst            |   24 +
 .../doc/gfc-internals/indices-and-tables.rst       |    1 +
 .../internals-of-fortran-2003-oop-features.rst     |   15 +
 gcc/fortran/doc/gfc-internals/introduction.rst     |   32 +
 .../doc/gfc-internals/symbol-versioning.rst        |   63 +
 .../the-libgfortran-runtime-library.rst            |   14 +
 .../doc/gfc-internals/type-bound-operators.rst     |   33 +
 .../doc/gfc-internals/type-bound-procedures.rst    |  101 +
 gcc/fortran/doc/gfortran/about-gnu-fortran.rst     |  115 +
 gcc/fortran/doc/gfortran/coarray-programming.rst   |   17 +
 .../doc/gfortran/compiler-characteristics.rst      |   27 +
 .../compiler-characteristics/asynchronous-i-o.rst  |   21 +
 .../data-consistency-and-durability.rst            |   80 +
 .../evaluation-of-logical-expressions.rst          |   18 +
 ...file-format-of-unformatted-sequential-files.rst |   63 +
 .../file-operations-on-symbolic-links.rst          |   28 +
 ...pened-without-an-explicit-action=-specifier.rst |   23 +
 ...nternal-representation-of-logical-variables.rst |   24 +
 .../kind-type-parameters.rst                       |   54 +
 ...-and-min-intrinsics-with-real-nan-arguments.rst |   21 +
 .../thread-safety-of-the-runtime-library.rst       |   53 +
 gcc/fortran/doc/gfortran/conf.py                   |   30 +
 gcc/fortran/doc/gfortran/contributing.rst          |   28 +
 .../doc/gfortran/contributors-to-gnu-fortran.rst   |  109 +
 gcc/fortran/doc/gfortran/copyright.rst             |   25 +
 .../extensions-implemented-in-gnu-fortran.rst      | 1535 ++++++
 .../extensions-not-implemented-in-gnu-fortran.rst  |  186 +
 gcc/fortran/doc/gfortran/extensions.rst            |   24 +
 .../doc/gfortran/function-abi-documentation.rst    | 1526 ++++++
 gcc/fortran/doc/gfortran/funding.rst               |    6 +
 .../doc/gfortran/general-public-license-3.rst      |    6 +
 gcc/fortran/doc/gfortran/gnu-fortran-and-gcc.rst   |   48 +
 .../doc/gfortran/gnu-fortran-command-options.rst   |   33 +
 .../gnu-fortran-command-options/description.rst    |   39 +
 .../enable-and-customize-preprocessing.rst         |  298 ++
 .../environment-variables-affecting-gfortran.rst   |   24 +
 .../influencing-runtime-behavior.rst               |   67 +
 .../influencing-the-linking-step.rst               |   37 +
 .../gnu-fortran-command-options/option-summary.rst |  104 +
 .../options-controlling-fortran-dialect.rst        |  411 ++
 .../options-for-code-generation-conventions.rst    |  583 +++
 ...s-for-debugging-your-program-or-gnu-fortran.rst |  134 +
 .../options-for-directory-search.rst               |   54 +
 ...s-for-interoperability-with-other-languages.rst |   63 +
 ...-to-request-or-suppress-errors-and-warnings.rst |  411 ++
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 libgomp/doc/amd-radeon-gcn.rst                     |   57 +
 libgomp/doc/conf.py                                |   24 +
 libgomp/doc/copyright.rst                          |   25 +
 libgomp/doc/cuda-streams-usage.rst                 |   50 +
 libgomp/doc/enabling-openacc.rst                   |   24 +
 libgomp/doc/enabling-openmp.rst                    |   22 +
 .../first-invocation-nvidia-cublas-library-api.rst |   52 +
 .../doc/first-invocation-openacc-library-api.rst   |   74 +
 libgomp/doc/funding.rst                            |    6 +
 libgomp/doc/general-public-license-3.rst           |    6 +
 libgomp/doc/gnu-free-documentation-license.rst     |    6 +
 ...-status-and-implementation-defined-behavior.rst |  281 ++
 libgomp/doc/index.rst                              |   35 +
 libgomp/doc/indices-and-tables.rst                 |    1 +
 libgomp/doc/introduction.rst                       |   25 +
 libgomp/doc/memory-allocation-with-libmemkind.rst  |   23 +
 libgomp/doc/nvptx.rst                              |   60 +
 libgomp/doc/offload-target-specifics.rst           |   17 +
 libgomp/doc/openacc-environment-variables.rst      |   23 +
 .../openacc-environment-variables/accdevicenum.rst |   13 +
 .../accdevicetype.rst                              |   13 +
 .../openacc-environment-variables/accproflib.rst   |   16 +
 .../openacc-environment-variables/gccaccnotify.rst |   12 +
 libgomp/doc/openacc-introduction.rst               |   21 +
 .../openacc-library-and-environment-variables.rst  |   30 +
 libgomp/doc/openacc-library-interoperability.rst   |   17 +
 libgomp/doc/openacc-profiling-interface.rst        |   14 +
 libgomp/doc/openacc-runtime-library-routines.rst   |   74 +
 .../accasynctest.rst                               |   36 +
 .../accasynctestall.rst                            |   34 +
 .../openacc-runtime-library-routines/accattach.rst |   25 +
 .../openacc-runtime-library-routines/acccopyin.rst |   58 +
 .../acccopyout.rst                                 |   85 +
 .../openacc-runtime-library-routines/acccreate.rst |   58 +
 .../openacc-runtime-library-routines/accdelete.rst |   85 +
 .../openacc-runtime-library-routines/accdetach.rst |   29 +
 .../accdeviceptr.rst                               |   23 +
 .../openacc-runtime-library-routines/accfree.rst   |   22 +
 .../accgetcudastream.rst                           |   23 +
 .../accgetcurrentcudacontext.rst                   |   23 +
 .../accgetcurrentcudadevice.rst                    |   23 +
 .../accgetdevicenum.rst                            |   34 +
 .../accgetdevicetype.rst                           |   36 +
 .../accgetnumdevices.rst                           |   31 +
 .../accgetproperty.rst                             |   60 +
 .../acchostptr.rst                                 |   23 +
 .../openacc-runtime-library-routines/accinit.rst   |   31 +
 .../accispresent.rst                               |   50 +
 .../openacc-runtime-library-routines/accmalloc.rst |   23 +
 .../accmapdata.rst                                 |   24 +
 .../accmemcpyfromdevice.rst                        |   24 +
 .../accmemcpytodevice.rst                          |   24 +
 .../accondevice.rst                                |   37 +
 .../accpresentorcopyin.rst                         |   58 +
 .../accpresentorcreate.rst                         |   58 +
 .../accproflookup.rst                              |   25 +
 .../accprofregister.rst                            |   25 +
 .../accprofunregister.rst                          |   25 +
 .../accregisterlibrary.rst                         |   25 +
 .../accsetcudastream.rst                           |   28 +
 .../accsetdevicenum.rst                            |   34 +
 .../accsetdevicetype.rst                           |   31 +
 .../accshutdown.rst                                |   31 +
 .../accunmapdata.rst                               |   23 +
 .../accupdatedevice.rst                            |   58 +
 .../accupdateself.rst                              |   58 +
 .../openacc-runtime-library-routines/accwait.rst   |   37 +
 .../accwaitall.rst                                 |   32 +
 .../accwaitallasync.rst                            |   32 +
 .../accwaitasync.rst                               |   31 +
 libgomp/doc/openmp-context-selectors.rst           |   28 +
 libgomp/doc/openmp-environment-variables.rst       |   39 +
 .../gompcpuaffinity.rst                            |   37 +
 .../doc/openmp-environment-variables/gompdebug.rst |   18 +
 .../gomprtemsthreadpools.rst                       |   46 +
 .../openmp-environment-variables/gompspincount.rst |   30 +
 .../openmp-environment-variables/gompstacksize.rst |   25 +
 .../ompcancellation.rst                            |   21 +
 .../ompdefaultdevice.rst                           |   24 +
 .../openmp-environment-variables/ompdisplayenv.rst |   21 +
 .../openmp-environment-variables/ompdynamic.rst    |   23 +
 .../ompmaxactivelevels.rst                         |   26 +
 .../ompmaxtaskpriority.rst                         |   25 +
 .../doc/openmp-environment-variables/ompnested.rst |   28 +
 .../openmp-environment-variables/ompnumteams.rst   |   23 +
 .../openmp-environment-variables/ompnumthreads.rst |   24 +
 .../doc/openmp-environment-variables/ompplaces.rst |   54 +
 .../openmp-environment-variables/ompprocbind.rst   |   34 +
 .../openmp-environment-variables/ompschedule.rst   |   24 +
 .../openmp-environment-variables/ompstacksize.rst  |   24 +
 .../omptargetoffload.rst                           |   27 +
 .../ompteamsthreadlimit.rst                        |   24 +
 .../ompthreadlimit.rst                             |   22 +
 .../openmp-environment-variables/ompwaitpolicy.rst |   24 +
 libgomp/doc/openmp-implementation-specifics.rst    |   15 +
 libgomp/doc/openmp-implementation-status.rst       |   21 +
 .../doc/openmp-implementation-status/openmp-45.rst |   11 +
 .../doc/openmp-implementation-status/openmp-50.rst |  212 +
 .../doc/openmp-implementation-status/openmp-51.rst |  177 +
 .../doc/openmp-implementation-status/openmp-52.rst |  132 +
 libgomp/doc/openmp-runtime-library-routines.rst    |   87 +
 .../ompdestroylock.rst                             |   33 +
 .../ompdestroynestlock.rst                         |   33 +
 .../ompfulfillevent.rst                            |   36 +
 .../ompgetactivelevel.rst                          |   31 +
 .../ompgetancestorthreadnum.rst                    |   35 +
 .../ompgetcancellation.rst                         |   33 +
 .../ompgetdefaultdevice.rst                        |   30 +
 .../ompgetdevicenum.rst                            |   33 +
 .../ompgetdynamic.rst                              |   37 +
 .../ompgetinitialdevice.rst                        |   32 +
 .../ompgetlevel.rst                                |   31 +
 .../ompgetmaxactivelevels.rst                      |   30 +
 .../ompgetmaxtaskpriority.rst                      |   29 +
 .../ompgetmaxteams.rst                             |   31 +
 .../ompgetmaxthreads.rst                           |   31 +
 .../ompgetnested.rst                               |   48 +
 .../ompgetnumdevices.rst                           |   27 +
 .../ompgetnumprocs.rst                             |   27 +
 .../ompgetnumteams.rst                             |   27 +
 .../ompgetnumthreads.rst                           |   38 +
 .../ompgetprocbind.rst                             |   34 +
 .../ompgetschedule.rst                             |   37 +
 .../ompgetsupportedactivelevels.rst                |   31 +
 .../ompgetteamnum.rst                              |   27 +
 .../ompgetteamsize.rst                             |   36 +
 .../ompgetteamsthreadlimit.rst                     |   31 +
 .../ompgetthreadlimit.rst                          |   30 +
 .../ompgetthreadnum.rst                            |   34 +
 .../ompgetwtick.rst                                |   31 +
 .../ompgetwtime.rst                                |   33 +
 .../openmp-runtime-library-routines/ompinfinal.rst |   29 +
 .../ompinitlock.rst                                |   33 +
 .../ompinitnestlock.rst                            |   33 +
 .../ompinparallel.rst                              |   29 +
 .../ompisinitialdevice.rst                         |   29 +
 .../ompsetdefaultdevice.rst                        |   33 +
 .../ompsetdynamic.rst                              |   35 +
 .../openmp-runtime-library-routines/ompsetlock.rst |   35 +
 .../ompsetmaxactivelevels.rst                      |   35 +
 .../ompsetnested.rst                               |   40 +
 .../ompsetnestlock.rst                             |   35 +
 .../ompsetnumteams.rst                             |   34 +
 .../ompsetnumthreads.rst                           |   34 +
 .../ompsetschedule.rst                             |   40 +
 .../ompsetteamsthreadlimit.rst                     |   35 +
 .../omptestlock.rst                                |   36 +
 .../omptestnestlock.rst                            |   36 +
 .../ompunsetlock.rst                               |   36 +
 .../ompunsetnestlock.rst                           |   36 +
 libgomp/doc/reporting-bugs.rst                     |   14 +
 libgomp/doc/the-libgomp-abi.rst                    |   31 +
 .../implementing-atomic-construct.rst              |   21 +
 .../implementing-barrier-construct.rst             |   13 +
 .../implementing-critical-construct.rst            |   30 +
 ...-lastprivate-copyin-and-copyprivate-clauses.rst |   45 +
 .../implementing-flush-construct.rst               |   11 +
 .../the-libgomp-abi/implementing-for-construct.rst |   73 +
 .../implementing-master-construct.rst              |   18 +
 .../implementing-openaccs-parallel-construct.rst   |   13 +
 .../implementing-ordered-construct.rst             |   14 +
 .../implementing-parallel-construct.rst            |   55 +
 .../implementing-private-clause.rst                |   17 +
 .../implementing-reduction-clause.rst              |   15 +
 .../implementing-sections-construct.rst            |   42 +
 .../implementing-single-construct.rst              |   48 +
 .../implementing-threadprivate-construct.rst       |   18 +
 libiberty/doc/bsd.rst                              |    6 +
 libiberty/doc/conf.py                              |   25 +
 libiberty/doc/copyright.rst                        |   13 +
 libiberty/doc/extensions.rst                       |  767 +++
 .../doc/function-variable-and-macro-listing.rst    | 1857 ++++++++
 libiberty/doc/index.rst                            |   23 +
 libiberty/doc/indices-and-tables.rst               |    1 +
 libiberty/doc/introduction.rst                     |    8 +
 .../doc/lesser-general-public-license-2.1.rst      |    6 +
 libiberty/doc/overview.rst                         |   20 +
 libiberty/doc/replacement-functions.rst            |   62 +
 libiberty/doc/supplemental-functions.rst           |   31 +
 libiberty/doc/using.rst                            |   40 +
 libitm/doc/c-c++-language-constructs-for-tm.rst    |   39 +
 libitm/doc/conf.py                                 |   24 +
 libitm/doc/copyright.rst                           |   13 +
 libitm/doc/enabling-libitm.rst                     |   13 +
 libitm/doc/gnu-free-documentation-license.rst      |    6 +
 libitm/doc/index.rst                               |   27 +
 libitm/doc/indices-and-tables.rst                  |    1 +
 libitm/doc/internals.rst                           |   16 +
 libitm/doc/locking-conventions.rst                 |  261 ++
 libitm/doc/nesting-flat-vs-closed.rst              |   28 +
 libitm/doc/the-libitm-abi.rst                      |   27 +
 libitm/doc/the-libitm-abi/function-list.rst        |  272 ++
 .../future-enhancements-to-the-abi.rst             |    7 +
 .../the-libitm-abi/library-design-principles.rst   |   61 +
 libitm/doc/the-libitm-abi/memory-model.rst         |   18 +
 libitm/doc/the-libitm-abi/non-objectives.rst       |    7 +
 libitm/doc/the-libitm-abi/objectives.rst           |    7 +
 libitm/doc/the-libitm-abi/sample-code.rst          |   10 +
 .../doc/the-libitm-abi/types-and-macros-list.rst   |   10 +
 libitm/doc/tm-methods-and-method-groups.rst        |   47 +
 libquadmath/doc/conf.py                            |   24 +
 libquadmath/doc/copyright.rst                      |   18 +
 libquadmath/doc/gnu-free-documentation-license.rst |    6 +
 libquadmath/doc/i-o-library-routines.rst           |   15 +
 libquadmath/doc/index.rst                          |   23 +
 libquadmath/doc/indices-and-tables.rst             |    1 +
 libquadmath/doc/introduction.rst                   |    7 +
 libquadmath/doc/math-library-routines.rst          |  104 +
 libquadmath/doc/quadmathsnprintf.rst               |   74 +
 libquadmath/doc/reporting-bugs.rst                 |   12 +
 libquadmath/doc/strtoflt128.rst                    |   40 +
 libquadmath/doc/typedef-and-constants.rst          |   43 +
 1335 files changed, 176984 insertions(+)

diff --git a/doc/Makefile b/doc/Makefile
new file mode 100644
index 00000000000..9e305a8e7da
--- /dev/null
+++ b/doc/Makefile
@@ -0,0 +1,97 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS   ?= -j auto -q
+SPHINXBUILD  ?= sphinx-build
+PAPER        ?=
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_elements.papersize=a4paper
+PAPEROPT_letter = -D latex_elements.papersize=letterpaper
+# $(O) is meant as a shortcut for $(SPHINXOPTS)
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+# the i18n builder cannot share the environment and doctrees with the others
+I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+
+.PHONY: help
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html        to make standalone HTML files"
+	@echo "  dirhtml     to make HTML files named index.html in directories"
+	@echo "  singlehtml  to make a single large HTML file"
+	@echo "  pickle      to make pickle files"
+	@echo "  json        to make JSON files"
+	@echo "  htmlhelp    to make HTML files and an HTML help project"
+	@echo "  qthelp      to make HTML files and a qthelp project"
+	@echo "  applehelp   to make an Apple Help Book"
+	@echo "  devhelp     to make HTML files and a Devhelp project"
+	@echo "  epub        to make an epub"
+	@echo "  latex       to make LaTeX files (you can set PAPER=a4 or PAPER=letter)"
+	@echo "  latexpdf    to make LaTeX files and then PDFs out of them"
+	@echo "  latexpdfja  to make LaTeX files and run them through platex/dvipdfmx"
+	@echo "  lualatexpdf to make LaTeX files and run them through lualatex"
+	@echo "  xelatexpdf  to make LaTeX files and run them through xelatex"
+	@echo "  text        to make text files"
+	@echo "  man         to make manual pages"
+	@echo "  texinfo     to make Texinfo files"
+	@echo "  info        to make Texinfo files and run them through makeinfo"
+	@echo "  gettext     to make PO message catalogs"
+	@echo "  changes     to make an overview of all changed/added/deprecated items"
+	@echo "  xml         to make Docutils-native XML files"
+	@echo "  pseudoxml   to make pseudoxml-XML files for display purposes"
+	@echo "  linkcheck   to check all external links for integrity"
+	@echo "  doctest     to run all doctests embedded in the documentation (if enabled)"
+	@echo "  coverage    to run coverage check of the documentation (if enabled)"
+	@echo "  dummy       to check syntax errors of document sources"
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILDDIR)
+
+.PHONY: latexpdf
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	$(MAKE) LATEXMKOPTS="-interaction=nonstopmode -f" -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: latexpdfja
+latexpdfja:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through platex and dvipdfmx..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: lualatexpdf
+lualatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through lualatex..."
+	$(MAKE) PDFLATEX=lualatex -C $(BUILDDIR)/latex all-pdf
+	@echo "lualatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: xelatexpdf
+xelatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through xelatex..."
+	$(MAKE) PDFLATEX=xelatex -C $(BUILDDIR)/latex all-pdf
+	@echo "xelatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: info
+info:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo "Running Texinfo files through makeinfo..."
+	make -C $(BUILDDIR)/texinfo info
+	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
+
+.PHONY: gettext
+gettext:
+	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+
+# Catch-all target: route all unknown targets to Sphinx
+.PHONY: Makefile
+%: Makefile
+	$(SPHINXBUILD) -b "$@" $(ALLSPHINXOPTS) "$(BUILDDIR)/$@"
+
diff --git a/doc/_static/custom.css b/doc/_static/custom.css
new file mode 100644
index 00000000000..1282a993e2a
--- /dev/null
+++ b/doc/_static/custom.css
@@ -0,0 +1,11 @@
+.sidebar-brand-text {
+  font-size: 13pt;
+}
+
+.literal {
+  white-space: nowrap !important;
+}
+
+.wy-nav-content {
+  max-width: initial;
+}
diff --git a/doc/baseconf.py b/doc/baseconf.py
new file mode 100644
index 00000000000..2eea8298dae
--- /dev/null
+++ b/doc/baseconf.py
@@ -0,0 +1,230 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import os
+import subprocess
+import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+# gccint needs a deeper stack limit
+sys.setrecursionlimit(2000)
+
+# -- Project information -----------------------------------------------------
+
+# The full version, including alpha/beta/rc tags
+
+# FIXME
+folder = os.path.dirname(os.path.realpath(__file__))
+gcc_srcdir = os.path.join(folder, './objdir')
+
+
+def __read_file(name):
+    path = os.path.join(gcc_srcdir, name)
+    if os.path.exists(path):
+        return open(path).read().strip()
+    else:
+        return ''
+
+
+def __get_git_revision():
+    try:
+        r = subprocess.check_output('git rev-parse --short HEAD', shell=True, encoding='utf8',
+                                    stderr=subprocess.DEVNULL)
+        return r.strip()
+    except subprocess.CalledProcessError:
+        return None
+
+
+def __get_builder_name():
+    if '-b' in sys.argv:
+        return sys.argv[sys.argv.index('-b') + 1]
+    else:
+        return None
+
+
+gcc_BASEVER = __read_file('BASE-VER')
+gcc_DEVPHASE = __read_file('DEV-PHASE')
+gcc_DATESTAMP = __read_file('DATESTAMP')
+gcc_REVISION = __read_file('REVISION')
+
+VERSION_PACKAGE = os.getenv('VERSION_PACKAGE', '(GCC)')
+BUGURL = os.getenv('BUGURL', 'https://gcc.gnu.org/bugs/')
+MONOCHROMATIC = os.getenv('MONOCHROMATIC')
+
+# The short X.Y version.
+version = gcc_BASEVER
+
+# The full version, including alpha/beta/rc tags.
+release = ('%s (%s %s%s)'
+           % (gcc_BASEVER, gcc_DEVPHASE, gcc_DATESTAMP,
+              (' %s' % gcc_REVISION) if gcc_REVISION else ''))
+
+rst_prolog = r'''
+.. |gol| raw:: latex
+
+               \\
+.. |nbsp| unicode:: 0xA0
+  :trim:
+'''
+
+needs_sphinx = '5.3'
+
+rst_epilog = '''
+.. |gcc_version| replace:: %s
+.. |package_version| replace:: %s
+.. |bugurl| replace:: %s
+.. |needs_sphinx| replace:: %s
+''' % (gcc_BASEVER, VERSION_PACKAGE, BUGURL, needs_sphinx)
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'gcc_sphinx',
+    'sphinx.ext.intersphinx',
+    'sphinx.ext.extlinks',
+    'sphinx.ext.todo',
+]
+
+if __get_builder_name() == 'html':
+    extensions.append('sphinx_copybutton')
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ['_build']
+
+# Do not highlight by default
+highlight_language = 'none'
+
+# Select C++ as a primary domain
+primary_domain = 'cpp'
+
+cpp_id_attributes = ['HOST_WIDE_INT', '__memx']
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'furo'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+html_theme_options = {
+    'navigation_with_keys': True,
+}
+
+html_logo = '../logo.svg'
+
+html_favicon = '../favicon.ico'
+
+html_last_updated_fmt = ''
+
+html_context = {
+    'commit': __get_git_revision()
+}
+
+html_static_path = [
+    '../_static'
+]
+
+html_css_files = [
+    'custom.css'
+]
+
+# By default, do not generate any manual pages
+man_pages = []
+
+# FIXME: handle WARNINGs: unknown option issues and cross refs
+suppress_warnings = [
+    'ref.option',
+]
+
+# Use xelatex by default
+latex_engine = 'xelatex'
+
+latex_logo = '../logo.pdf'
+
+latex_elements = {
+    'pointsize': '11pt',
+    'fontpkg': r'''
+\setmonofont[Scale=0.8]{DejaVu Sans Mono}
+''',
+    'preamble': r'''
+\fvset{formatcom=\let\textbf\relax}
+\protected\def\sphinxcrossref#1{#1}
+''',
+}
+
+if MONOCHROMATIC:
+    latex_elements['sphinxsetup'] = r'''
+TitleColor={black},
+InnerLinkColor={rgb}{0.0, 0.2, 0.6},
+OuterLinkColor={rgb}{0.0, 0.2, 0.6},
+'''
+
+latex_table_style = ['colorrows']
+
+texinfo_cross_references = False
+
+texinfo_elements = {'preamble': """
+@definfoenclose strong,*,*
+@definfoenclose emph,','
+"""
+}
+
+# Use default as RTD theme uses default as well
+pygments_style = 'bw' if MONOCHROMATIC else 'default'
+
+option_emphasise_placeholders = True
+
+# Ignore GitHub domain for link checking:
+# https://github.com/sphinx-doc/sphinx/issues/9016
+linkcheck_ignore = [
+    'https://github.com/.*#.*'
+]
+
+USER_LEVEL_DOCS = ('install', 'gcc', 'gfortran', 'cpp', 'gnat_rm', 'gnat_ugn',
+                   'gccgo', 'libgomp', 'libquadmath', 'libgccjit')
+INTERNAL_DOCS = ('gccint', 'cppinternals', 'gfc-internals', 'gnat-style')
+
+# Cross manual reference mapping
+intersphinx_mapping = {}
+for manual in USER_LEVEL_DOCS + INTERNAL_DOCS:
+    intersphinx_mapping[manual] = (f'https://splichal.eu/scripts/sphinx/{manual}/_build/html/', None)
+
+# Custom references
+extlinks = {
+    'P': ('https://wg21.link/p%s', 'P%s'),
+    'PR': ('https://gcc.gnu.org/PR%s', 'PR%s'),
+    'openmp': ('https://openmp.org/specifications/#%s', 'OpenMP specification v%s'),
+    'openacc': ('https://openacc.org/specification#%s', 'OpenACC specification v%s'),
+}
+
+extlinks_detect_hardcoded_links = True
+
+# Set common settings where we need NAME of the documentation
+def set_common(name, module):
+    module['tags'].add(name)
+    if gcc_DEVPHASE == 'experimental':
+        module['todo_include_todos'] = True
+        module['tags'].add('development')
+
+    html_theme_options['source_edit_link'] = f'https://splichal.eu/scripts/sphinx/{name}' \
+                                               '/_build/html/_sources/{filename}.txt'
diff --git a/doc/bsd.rst b/doc/bsd.rst
new file mode 100644
index 00000000000..6d53fa6271c
--- /dev/null
+++ b/doc/bsd.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+BSD
+===
+
+Copyright (C) 1990 Regents of the University of California.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+#. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+#. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+#. [rescinded 22 July 1999]
+
+#. Neither the name of the University nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS 'AS IS' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
\ No newline at end of file
diff --git a/doc/contrib.rst b/doc/contrib.rst
new file mode 100644
index 00000000000..273d61717b1
--- /dev/null
+++ b/doc/contrib.rst
@@ -0,0 +1,1273 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: contributors
+
+.. _contributors:
+
+Contributors to GCC
+===================
+
+The GCC project would like to thank its many contributors.  Without them the
+project would not have been nearly as successful as it has been.  Any omissions
+in this list are accidental.  Feel free to contact
+law@redhat.com or gerald@pfeifer.com if you have been left
+out or some of your contributions are not listed.  Please keep this list in
+alphabetical order.
+
+* Analog Devices helped implement the support for complex data types
+  and iterators.
+
+* John David Anglin for threading-related fixes and improvements to
+  libstdc++-v3, and the HP-UX port.
+
+* James van Artsdalen wrote the code that makes efficient use of
+  the Intel 80387 register stack.
+
+* Abramo and Roberto Bagnara for the SysV68 Motorola 3300 Delta Series
+  port.
+
+* Alasdair Baird for various bug fixes.
+
+* Giovanni Bajo for analyzing lots of complicated C++ problem reports.
+
+* Peter Barada for his work to improve code generation for new
+  ColdFire cores.
+
+* Gerald Baumgartner added the signature extension to the C++ front end.
+
+* Godmar Back for his Java improvements and encouragement.
+
+* Scott Bambrough for help porting the Java compiler.
+
+* Wolfgang Bangerth for processing tons of bug reports.
+
+* Jon Beniston for his Microsoft Windows port of Java and port to Lattice Mico32.
+
+* Daniel Berlin for better DWARF 2 support, faster/better optimizations,
+  improved alias analysis, plus migrating GCC to Bugzilla.
+
+* Geoff Berry for his Java object serialization work and various patches.
+
+* David Binderman tests weekly snapshots of GCC trunk against Fedora Rawhide
+  for several architectures.
+
+* Laurynas Biveinis for memory management work and DJGPP port fixes.
+
+* Uros Bizjak for the implementation of x87 math built-in functions and
+  for various middle end and i386 back end improvements and bug fixes.
+
+* Eric Blake for helping to make GCJ and libgcj conform to the
+  specifications.
+
+* Janne Blomqvist for contributions to GNU Fortran.
+
+* Hans-J. Boehm for his garbage collector, IA-64 libffi port, and other
+  Java work.
+
+* Segher Boessenkool for helping maintain the PowerPC port and the
+  instruction combiner plus various contributions to the middle end.
+
+* Neil Booth for work on cpplib, lang hooks, debug hooks and other
+  miscellaneous clean-ups.
+
+* Steven Bosscher for integrating the GNU Fortran front end into GCC and for
+  contributing to the tree-ssa branch.
+
+* Eric Botcazou for fixing middle- and backend bugs left and right.
+
+* Per Bothner for his direction via the steering committee and various
+  improvements to the infrastructure for supporting new languages.  Chill
+  front end implementation.  Initial implementations of
+  cpplib, fix-header, config.guess, libio, and past C++ library (libg++)
+  maintainer.  Dreaming up, designing and implementing much of GCJ.
+
+* Devon Bowen helped port GCC to the Tahoe.
+
+* Don Bowman for mips-vxworks contributions.
+
+* James Bowman for the FT32 port.
+
+* Dave Brolley for work on cpplib and Chill.
+
+* Paul Brook for work on the ARM architecture and maintaining GNU Fortran.
+
+* Robert Brown implemented the support for Encore 32000 systems.
+
+* Christian Bruel for improvements to local store elimination.
+
+* Herman A.J. ten Brugge for various fixes.
+
+* Joerg Brunsmann for Java compiler hacking and help with the GCJ FAQ.
+
+* Joe Buck for his direction via the steering committee from its creation
+  to 2013.
+
+* Iain Buclaw for the D frontend.
+
+* Craig Burley for leadership of the G77 Fortran effort.
+
+* Tobias Burnus for contributions to GNU Fortran.
+
+* Stephan Buys for contributing Doxygen notes for libstdc++.
+
+* Paolo Carlini for libstdc++ work: lots of efficiency improvements to
+  the C++ strings, streambufs and formatted I/O, hard detective work on
+  the frustrating localization issues, and keeping up with the problem reports.
+
+* John Carr for his alias work, SPARC hacking, infrastructure improvements,
+  previous contributions to the steering committee, loop optimizations, etc.
+
+* Stephane Carrez for 68HC11 and 68HC12 ports.
+
+* Steve Chamberlain for support for the Renesas SH and H8 processors
+  and the PicoJava processor, and for GCJ config fixes.
+
+* Glenn Chambers for help with the GCJ FAQ.
+
+* John-Marc Chandonia for various libgcj patches.
+
+* Denis Chertykov for contributing and maintaining the AVR port, the first GCC port
+  for an 8-bit architecture.
+
+* Kito Cheng for his work on the RISC-V port, including bringing up the test
+  suite and maintenance.
+
+* Scott Christley for his Objective-C contributions.
+
+* Eric Christopher for his Java porting help and clean-ups.
+
+* Branko Cibej for more warning contributions.
+
+* The `GNU Classpath project <https://www.gnu.org/software/classpath/>`_
+  for all of their merged runtime code.
+
+* Nick Clifton for arm, mcore, fr30, v850, m32r, msp430 rx work,
+  :option:`--help`, and other random hacking.
+
+* Michael Cook for libstdc++ cleanup patches to reduce warnings.
+
+* R. Kelley Cook for making GCC buildable from a read-only directory as
+  well as other miscellaneous build process and documentation clean-ups.
+
+* Ralf Corsepius for SH testing and minor bug fixing.
+
+* François-Xavier Coudert for contributions to GNU Fortran.
+
+* Stan Cox for care and feeding of the x86 port and lots of behind
+  the scenes hacking.
+
+* Alex Crain provided changes for the 3b1.
+
+* Ian Dall for major improvements to the NS32k port.
+
+* Paul Dale for his work to add uClinux platform support to the
+  m68k backend.
+
+* Palmer Dabbelt for his work maintaining the RISC-V port.
+
+* Dario Dariol contributed the four varieties of sample programs
+  that print a copy of their source.
+
+* Russell Davidson for fstream and stringstream fixes in libstdc++.
+
+* Bud Davis for work on the G77 and GNU Fortran compilers.
+
+* Mo DeJong for GCJ and libgcj bug fixes.
+
+* Jerry DeLisle for contributions to GNU Fortran.
+
+* DJ Delorie for the DJGPP port, build and libiberty maintenance,
+  various bug fixes, and the M32C, MeP, MSP430, and RL78 ports.
+
+* Arnaud Desitter for helping to debug GNU Fortran.
+
+* Gabriel Dos Reis for contributions to G++, contributions and
+  maintenance of GCC diagnostics infrastructure, libstdc++-v3,
+  including ``valarray<>``, ``complex<>``, maintaining the numerics library
+  (including that pesky ``<limits>`` :-) and keeping up-to-date anything
+  to do with numbers.
+
+* Ulrich Drepper for his work on glibc, testing of GCC using glibc, ISO C99
+  support, CFG dumping support, etc., plus support of the C++ runtime
+  libraries including for all kinds of C interface issues, contributing and
+  maintaining ``complex<>``, sanity checking and disbursement, configuration
+  architecture, libio maintenance, and early math work.
+
+* François Dumont for his work on libstdc++-v3, especially maintaining and
+  improving ``debug-mode`` and associative and unordered containers.
+
+* Zdenek Dvorak for a new loop unroller and various fixes.
+
+* Michael Eager for his work on the Xilinx MicroBlaze port.
+
+* Richard Earnshaw for his ongoing work with the ARM.
+
+* David Edelsohn for his direction via the steering committee, ongoing work
+  with the RS6000/PowerPC port, help cleaning up Haifa loop changes,
+  doing the entire AIX port of libstdc++ with his bare hands, and for
+  ensuring GCC properly keeps working on AIX.
+
+* Kevin Ediger for the floating point formatting of num_put::do_put in
+  libstdc++.
+
+* Phil Edwards for libstdc++ work including configuration hackery,
+  documentation maintainer, chief breaker of the web pages, the occasional
+  iostream bug fix, and work on shared library symbol versioning.
+
+* Paul Eggert for random hacking all over GCC.
+
+* Mark Elbrecht for various DJGPP improvements, and for libstdc++
+  configuration support for locales and fstream-related fixes.
+
+* Vadim Egorov for libstdc++ fixes in strings, streambufs, and iostreams.
+
+* Christian Ehrhardt for dealing with bug reports.
+
+* Ben Elliston for his work to move the Objective-C runtime into its
+  own subdirectory and for his work on autoconf.
+
+* Revital Eres for work on the PowerPC 750CL port.
+
+* Marc Espie for OpenBSD support.
+
+* Doug Evans for much of the global optimization framework, arc, m32r,
+  and SPARC work.
+
+* Christopher Faylor for his work on the Cygwin port and for caring and
+  feeding the gcc.gnu.org box and saving its users tons of spam.
+
+* Fred Fish for BeOS support and Ada fixes.
+
+* Ivan Fontes Garcia for the Portuguese translation of the GCJ FAQ.
+
+* Peter Gerwinski for various bug fixes and the Pascal front end.
+
+* Kaveh R. Ghazi for his direction via the steering committee, amazing
+  work to make :samp:`-W -Wall -W* -Werror` useful, and
+  testing GCC on a plethora of platforms.  Kaveh extends his gratitude to
+  the CAIP Center at Rutgers University for providing him with computing
+  resources to work on Free Software from the late 1980s to 2010.
+
+* John Gilmore for a donation to the FSF earmarked improving GNU Java.
+
+* Judy Goldberg for c++ contributions.
+
+* Torbjorn Granlund for various fixes and the c-torture testsuite,
+  multiply- and divide-by-constant optimization, improved long long
+  support, improved leaf function register allocation, and his direction
+  via the steering committee.
+
+* Jonny Grant for improvements to ``collect2's`` :option:`--help` documentation.
+
+* Anthony Green for his :option:`-Os` contributions, the moxie port, and
+  Java front end work.
+
+* Stu Grossman for gdb hacking, allowing GCJ developers to debug Java code.
+
+* Michael K. Gschwind contributed the port to the PDP-11.
+
+* Richard Biener for his ongoing middle-end contributions and bug fixes
+  and for release management.
+
+* Ron Guilmette implemented the :command:`protoize` and :command:`unprotoize`
+  tools, the support for DWARF 1 symbolic debugging information, and much of
+  the support for System V Release 4.  He has also worked heavily on the
+  Intel 386 and 860 support.
+
+* Sumanth Gundapaneni for contributing the CR16 port.
+
+* Mostafa Hagog for Swing Modulo Scheduling (SMS) and post reload GCSE.
+
+* Bruno Haible for improvements in the runtime overhead for EH, new
+  warnings and assorted bug fixes.
+
+* Andrew Haley for his amazing Java compiler and library efforts.
+
+* Chris Hanson assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Michael Hayes for various thankless work he's done trying to get
+  the c30/c40 ports functional.  Lots of loop and unroll improvements and
+  fixes.
+
+* Dara Hazeghi for wading through myriads of target-specific bug reports.
+
+* Kate Hedstrom for staking the G77 folks with an initial testsuite.
+
+* Richard Henderson for his ongoing SPARC, alpha, ia32, and ia64 work, loop
+  opts, and generally fixing lots of old problems we've ignored for
+  years, flow rewrite and lots of further stuff, including reviewing
+  tons of patches.
+
+* Aldy Hernandez for working on the PowerPC port, SIMD support, and
+  various fixes.
+
+* Nobuyuki Hikichi of Software Research Associates, Tokyo, contributed
+  the support for the Sony NEWS machine.
+
+* Kazu Hirata for caring and feeding the Renesas H8/300 port and various fixes.
+
+* Katherine Holcomb for work on GNU Fortran.
+
+* Manfred Hollstein for his ongoing work to keep the m88k alive, lots
+  of testing and bug fixing, particularly of GCC configury code.
+
+* Steve Holmgren for MachTen patches.
+
+* Mat Hostetter for work on the TILE-Gx and TILEPro ports.
+
+* Jan Hubicka for his x86 port improvements.
+
+* Falk Hueffner for working on C and optimization bug reports.
+
+* Bernardo Innocenti for his m68k work, including merging of
+  ColdFire improvements and uClinux support.
+
+* Christian Iseli for various bug fixes.
+
+* Kamil Iskra for general m68k hacking.
+
+* Lee Iverson for random fixes and MIPS testing.
+
+* Balaji V. Iyer for Cilk+ development and merging.
+
+* Andreas Jaeger for testing and benchmarking of GCC and various bug fixes.
+
+* Martin Jambor for his work on inter-procedural optimizations, the
+  switch conversion pass, and scalar replacement of aggregates.
+
+* Jakub Jelinek for his SPARC work and sibling call optimizations as well
+  as lots of bug fixes and test cases, and for improving the Java build
+  system.
+
+* Janis Johnson for ia64 testing and fixes, her quality improvement
+  sidetracks, and web page maintenance.
+
+* Kean Johnston for SCO OpenServer support and various fixes.
+
+* Tim Josling for the sample language treelang based originally on Richard
+  Kenner's 'toy' language.
+
+* Nicolai Josuttis for additional libstdc++ documentation.
+
+* Klaus Kaempf for his ongoing work to make alpha-vms a viable target.
+
+* Steven G. Kargl for work on GNU Fortran.
+
+* David Kashtan of SRI adapted GCC to VMS.
+
+* Ryszard Kabatek for many, many libstdc++ bug fixes and optimizations of
+  strings, especially member functions, and for auto_ptr fixes.
+
+* Geoffrey Keating for his ongoing work to make the PPC work for GNU/Linux
+  and his automatic regression tester.
+
+* Brendan Kehoe for his ongoing work with G++ and for a lot of early work
+  in just about every part of libstdc++.
+
+* Oliver M. Kellogg of Deutsche Aerospace contributed the port to the
+  MIL-STD-1750A.
+
+* Richard Kenner of the New York University Ultracomputer Research
+  Laboratory wrote the machine descriptions for the AMD 29000, the DEC
+  Alpha, the IBM RT PC, and the IBM RS/6000 as well as the support for
+  instruction attributes.  He also made changes to better support RISC
+  processors including changes to common subexpression elimination,
+  strength reduction, function calling sequence handling, and condition
+  code support, in addition to generalizing the code for frame pointer
+  elimination and delay slot scheduling.  Richard Kenner was also the
+  head maintainer of GCC for several years.
+
+* Mumit Khan for various contributions to the Cygwin and Mingw32 ports and
+  maintaining binary releases for Microsoft Windows hosts, and for massive libstdc++
+  porting work to Cygwin/Mingw32.
+
+* Robin Kirkham for cpu32 support.
+
+* Mark Klein for PA improvements.
+
+* Thomas Koenig for various bug fixes.
+
+* Bruce Korb for the new and improved fixincludes code.
+
+* Benjamin Kosnik for his G++ work and for leading the libstdc++-v3 effort.
+
+* Maxim Kuvyrkov for contributions to the instruction scheduler, the Android
+  and m68k/Coldfire ports, and optimizations.
+
+* Charles LaBrec contributed the support for the Integrated Solutions
+  68020 system.
+
+* Asher Langton and Mike Kumbera for contributing Cray pointer support
+  to GNU Fortran, and for other GNU Fortran improvements.
+
+* Jeff Law for his direction via the steering committee, coordinating the
+  entire egcs project and GCC 2.95, rolling out snapshots and releases,
+  handling merges from GCC2, reviewing tons of patches that might have
+  fallen through the cracks else, and random but extensive hacking.
+
+* Walter Lee for work on the TILE-Gx and TILEPro ports.
+
+* Marc Lehmann for his direction via the steering committee and helping
+  with analysis and improvements of x86 performance.
+
+* Victor Leikehman for work on GNU Fortran.
+
+* Ted Lemon wrote parts of the RTL reader and printer.
+
+* Kriang Lerdsuwanakij for C++ improvements including template as template
+  parameter support, and many C++ fixes.
+
+* Warren Levy for tremendous work on libgcj (Java Runtime Library) and
+  random work on the Java front end.
+
+* Alain Lichnewsky ported GCC to the MIPS CPU.
+
+* Oskar Liljeblad for hacking on AWT and his many Java bug reports and
+  patches.
+
+* Robert Lipe for OpenServer support, new testsuites, testing, etc.
+
+* Chen Liqin for various S+core related fixes/improvement, and for
+  maintaining the S+core port.
+
+* Martin Liska for his work on identical code folding, the sanitizers,
+  HSA, general bug fixing and for running automated regression testing of GCC
+  and reporting numerous bugs.
+
+* Weiwen Liu for testing and various bug fixes.
+
+* Manuel López-Ibáñez for improving :option:`-Wconversion` and
+  many other diagnostics fixes and improvements.
+
+* Dave Love for his ongoing work with the Fortran front end and
+  runtime libraries.
+
+* Martin von Löwis for internal consistency checking infrastructure,
+  various C++ improvements including namespace support, and tons of
+  assistance with libstdc++/compiler merges.
+
+* H.J. Lu for his previous contributions to the steering committee, many x86
+  bug reports, prototype patches, and keeping the GNU/Linux ports working.
+
+* Greg McGary for random fixes and (someday) bounded pointers.
+
+* Andrew MacLeod for his ongoing work in building a real EH system,
+  various code generation improvements, work on the global optimizer, etc.
+
+* Vladimir Makarov for hacking some ugly i960 problems, PowerPC hacking
+  improvements to compile-time performance, overall knowledge and
+  direction in the area of instruction scheduling, design and
+  implementation of the automaton based instruction scheduler and
+  design and implementation of the integrated and local register allocators.
+
+* David Malcolm for his work on improving GCC diagnostics, JIT, self-tests
+  and unit testing.
+
+* Bob Manson for his behind the scenes work on dejagnu.
+
+* John Marino for contributing the DragonFly BSD port.
+
+* Philip Martin for lots of libstdc++ string and vector iterator fixes and
+  improvements, and string clean up and testsuites.
+
+* Michael Matz for his work on dominance tree discovery, the x86-64 port,
+  link-time optimization framework and general optimization improvements.
+
+* All of the Mauve project contributors for Java test code.
+
+* Bryce McKinlay for numerous GCJ and libgcj fixes and improvements.
+
+* Adam Megacz for his work on the Microsoft Windows port of GCJ.
+
+* Michael Meissner for LRS framework, ia32, m32r, v850, m88k, MIPS,
+  powerpc, haifa, ECOFF debug support, and other assorted hacking.
+
+* Jason Merrill for his direction via the steering committee and leading
+  the G++ effort.
+
+* Martin Michlmayr for testing GCC on several architectures using the
+  entire Debian archive.
+
+* David Miller for his direction via the steering committee, lots of
+  SPARC work, improvements in jump.cc and interfacing with the Linux kernel
+  developers.
+
+* Gary Miller ported GCC to Charles River Data Systems machines.
+
+* Alfred Minarik for libstdc++ string and ios bug fixes, and turning the
+  entire libstdc++ testsuite namespace-compatible.
+
+* Mark Mitchell for his direction via the steering committee, mountains of
+  C++ work, load/store hoisting out of loops, alias analysis improvements,
+  ISO C ``restrict`` support, and serving as release manager from 2000
+  to 2011.
+
+* Alan Modra for various GNU/Linux bits and testing.
+
+* Toon Moene for his direction via the steering committee, Fortran
+  maintenance, and his ongoing work to make us make Fortran run fast.
+
+* Jason Molenda for major help in the care and feeding of all the services
+  on the gcc.gnu.org (formerly egcs.cygnus.com) machine---mail, web
+  services, ftp services, etc etc.  Doing all this work on scrap paper and
+  the backs of envelopes would have been... difficult.
+
+* Catherine Moore for fixing various ugly problems we have sent her
+  way, including the haifa bug which was killing the Alpha & PowerPC
+  Linux kernels.
+
+* Mike Moreton for his various Java patches.
+
+* David Mosberger-Tang for various Alpha improvements, and for the initial
+  IA-64 port.
+
+* Stephen Moshier contributed the floating point emulator that assists in
+  cross-compilation and permits support for floating point numbers wider
+  than 64 bits and for ISO C99 support.
+
+* Bill Moyer for his behind the scenes work on various issues.
+
+* Philippe De Muyter for his work on the m68k port.
+
+* Joseph S. Myers for his work on the PDP-11 port, format checking and ISO
+  C99 support, and continuous emphasis on (and contributions to) documentation.
+
+* Nathan Myers for his work on libstdc++-v3: architecture and authorship
+  through the first three snapshots, including implementation of locale
+  infrastructure, string, shadow C headers, and the initial project
+  documentation (DESIGN, CHECKLIST, and so forth).  Later, more work on
+  MT-safe string and shadow headers.
+
+* Felix Natter for documentation on porting libstdc++.
+
+* Nathanael Nerode for cleaning up the configuration/build process.
+
+* NeXT, Inc. donated the front end that supports the Objective-C
+  language.
+
+* Hans-Peter Nilsson for the CRIS and MMIX ports, improvements to the search
+  engine setup, various documentation fixes and other small fixes.
+
+* Geoff Noer for his work on getting cygwin native builds working.
+
+* Vegard Nossum for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Diego Novillo for his work on Tree SSA, OpenMP, SPEC performance
+  tracking web pages, GIMPLE tuples, and assorted fixes.
+
+* David O'Brien for the FreeBSD/alpha, FreeBSD/AMD x86-64, FreeBSD/ARM,
+  FreeBSD/PowerPC, and FreeBSD/SPARC64 ports and related infrastructure
+  improvements.
+
+* Alexandre Oliva for various build infrastructure improvements, scripts and
+  amazing testing work, including keeping libtool issues sane and happy.
+
+* Stefan Olsson for work on mt_alloc.
+
+* Melissa O'Neill for various NeXT fixes.
+
+* Rainer Orth for random MIPS work, including improvements to GCC's o32
+  ABI support, improvements to dejagnu's MIPS support, Java configuration
+  clean-ups and porting work, and maintaining the IRIX, Solaris 2, and
+  Tru64 UNIX ports.
+
+* Steven Pemberton for his contribution of :samp:`enquire` which allowed GCC to
+  determine various properties of the floating point unit and generate
+  :samp:`float.h` in older versions of GCC.
+
+* Hartmut Penner for work on the s390 port.
+
+* Paul Petersen wrote the machine description for the Alliant FX/8.
+
+* Alexandre Petit-Bianco for implementing much of the Java compiler and
+  continued Java maintainership.
+
+* Matthias Pfaller for major improvements to the NS32k port.
+
+* Gerald Pfeifer for his direction via the steering committee, pointing
+  out lots of problems we need to solve, maintenance of the web pages, and
+  taking care of documentation maintenance in general.
+
+* Marek Polacek for his work on the C front end, the sanitizers and general
+  bug fixing.
+
+* Andrew Pinski for processing bug reports by the dozen.
+
+* Ovidiu Predescu for his work on the Objective-C front end and runtime
+  libraries.
+
+* Jerry Quinn for major performance improvements in C++ formatted I/O.
+
+* Ken Raeburn for various improvements to checker, MIPS ports and various
+  cleanups in the compiler.
+
+* Rolf W. Rasmussen for hacking on AWT.
+
+* David Reese of Sun Microsystems contributed to the Solaris on PowerPC
+  port.
+
+* John Regehr for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Volker Reichelt for running automated regression testing of GCC and reporting
+  numerous bugs and for keeping up with the problem reports.
+
+* Joern Rennecke for maintaining the sh port, loop, regmove & reload
+  hacking and developing and maintaining the Epiphany port.
+
+* Loren J. Rittle for improvements to libstdc++-v3 including the FreeBSD
+  port, threading fixes, thread-related configury changes, critical
+  threading documentation, and solutions to really tricky I/O problems,
+  as well as keeping GCC properly working on FreeBSD and continuous testing.
+
+* Craig Rodrigues for processing tons of bug reports.
+
+* Ola Rönnerup for work on mt_alloc.
+
+* Gavin Romig-Koch for lots of behind the scenes MIPS work.
+
+* David Ronis inspired and encouraged Craig to rewrite the G77
+  documentation in texinfo format by contributing a first pass at a
+  translation of the old :samp:`g77-0.5.16/f/DOC` file.
+
+* Ken Rose for fixes to GCC's delay slot filling code.
+
+* Ira Rosen for her contributions to the auto-vectorizer.
+
+* Paul Rubin wrote most of the preprocessor.
+
+* Pétur Runólfsson for major performance improvements in C++ formatted I/O and
+  large file support in C++ filebuf.
+
+* Chip Salzenberg for libstdc++ patches and improvements to locales, traits,
+  Makefiles, libio, libtool hackery, and 'long long' support.
+
+* Juha Sarlin for improvements to the H8 code generator.
+
+* Greg Satz assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Roger Sayle for improvements to constant folding and GCC's RTL optimizers
+  as well as for fixing numerous bugs.
+
+* Bradley Schatz for his work on the GCJ FAQ.
+
+* Peter Schauer wrote the code to allow debugging to work on the Alpha.
+
+* William Schelter did most of the work on the Intel 80386 support.
+
+* Tobias Schlüter for work on GNU Fortran.
+
+* Bernd Schmidt for various code generation improvements and major
+  work in the reload pass, serving as release manager for
+  GCC 2.95.3, and work on the Blackfin and C6X ports.
+
+* Peter Schmid for constant testing of libstdc++---especially application
+  testing, going above and beyond what was requested for the release
+  criteria---and libstdc++ header file tweaks.
+
+* Jason Schroeder for jcf-dump patches.
+
+* Andreas Schwab for his work on the m68k port.
+
+* Lars Segerlund for work on GNU Fortran.
+
+* Dodji Seketeli for numerous C++ bug fixes and debug info improvements.
+
+* Tim Shen for major work on ``<regex>``.
+
+* Joel Sherrill for his direction via the steering committee, RTEMS
+  contributions and RTEMS testing.
+
+* Nathan Sidwell for many C++ fixes/improvements.
+
+* Jeffrey Siegal for helping RMS with the original design of GCC, some
+  code which handles the parse tree and RTL data structures, constant
+  folding and help with the original VAX & m68k ports.
+
+* Kenny Simpson for prompting libstdc++ fixes due to defect reports from
+  the LWG (thereby keeping GCC in line with updates from the ISO).
+
+* Franz Sirl for his ongoing work with making the PPC port stable
+  for GNU/Linux.
+
+* Andrey Slepuhin for assorted AIX hacking.
+
+* Trevor Smigiel for contributing the SPU port.
+
+* Christopher Smith did the port for Convex machines.
+
+* Danny Smith for his major efforts on the Mingw (and Cygwin) ports.
+  Retired from GCC maintainership August 2010, having mentored two
+  new maintainers into the role.
+
+* Randy Smith finished the Sun FPA support.
+
+* Ed Smith-Rowland for his continuous work on libstdc++-v3, special functions,
+  ``<random>``, and various improvements to C++11 features.
+
+* Scott Snyder for queue, iterator, istream, and string fixes and libstdc++
+  testsuite entries.  Also for providing the patch to G77 to add
+  rudimentary support for ``INTEGER*1``, ``INTEGER*2``, and
+  ``LOGICAL*1``.
+
+* Zdenek Sojka for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Arseny Solokha for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Jayant Sonar for contributing the CR16 port.
+
+* Brad Spencer for contributions to the GLIBCPP_FORCE_NEW technique.
+
+* Richard Stallman, for writing the original GCC and launching the GNU project.
+
+* Jan Stein of the Chalmers Computer Society provided support for
+  Genix, as well as part of the 32000 machine description.
+
+* Gerhard Steinmetz for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Nigel Stephens for various mips16 related fixes/improvements.
+
+* Jonathan Stone wrote the machine description for the Pyramid computer.
+
+* Graham Stott for various infrastructure improvements.
+
+* John Stracke for his Java HTTP protocol fixes.
+
+* Mike Stump for his Elxsi port, G++ contributions over the years and more
+  recently his vxworks contributions
+
+* Jeff Sturm for Java porting help, bug fixes, and encouragement.
+
+* Zhendong Su for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Chengnian Sun for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Shigeya Suzuki for this fixes for the bsdi platforms.
+
+* Ian Lance Taylor for the Go frontend, the initial mips16 and mips64
+  support, general configury hacking, fixincludes, etc.
+
+* Holger Teutsch provided the support for the Clipper CPU.
+
+* Gary Thomas for his ongoing work to make the PPC work for GNU/Linux.
+
+* Paul Thomas for contributions to GNU Fortran.
+
+* Philipp Thomas for random bug fixes throughout the compiler
+
+* Jason Thorpe for thread support in libstdc++ on NetBSD.
+
+* Kresten Krab Thorup wrote the run time support for the Objective-C
+  language and the fantastic Java bytecode interpreter.
+
+* Michael Tiemann for random bug fixes, the first instruction scheduler,
+  initial C++ support, function integration, NS32k, SPARC and M88k
+  machine description work, delay slot scheduling.
+
+* Andreas Tobler for his work porting libgcj to Darwin.
+
+* Teemu Torma for thread safe exception handling support.
+
+* Leonard Tower wrote parts of the parser, RTL generator, and RTL
+  definitions, and of the VAX machine description.
+
+* Daniel Towner and Hariharan Sandanagobalane contributed and
+  maintain the picoChip port.
+
+* Tom Tromey for internationalization support and for his many Java
+  contributions and libgcj maintainership.
+
+* Lassi Tuura for improvements to config.guess to determine HP processor
+  types.
+
+* Petter Urkedal for libstdc++ CXXFLAGS, math, and algorithms fixes.
+
+* Andy Vaught for the design and initial implementation of the GNU Fortran
+  front end.
+
+* Brent Verner for work with the libstdc++ cshadow files and their
+  associated configure steps.
+
+* Todd Vierling for contributions for NetBSD ports.
+
+* Andrew Waterman for contributing the RISC-V port, as well as maintaining it.
+
+* Jonathan Wakely for contributing libstdc++ Doxygen notes and XHTML
+  guidance and maintaining libstdc++.
+
+* Dean Wakerley for converting the install documentation from HTML to texinfo
+  in time for GCC 3.0.
+
+* Krister Walfridsson for random bug fixes.
+
+* Feng Wang for contributions to GNU Fortran.
+
+* Stephen M. Webb for time and effort on making libstdc++ shadow files
+  work with the tricky Solaris 8+ headers, and for pushing the build-time
+  header tree. Also, for starting and driving the ``<regex>`` effort.
+
+* John Wehle for various improvements for the x86 code generator,
+  related infrastructure improvements to help x86 code generation,
+  value range propagation and other work, WE32k port.
+
+* Ulrich Weigand for work on the s390 port.
+
+* Janus Weil for contributions to GNU Fortran.
+
+* Zack Weinberg for major work on cpplib and various other bug fixes.
+
+* Matt Welsh for help with Linux Threads support in GCJ.
+
+* Urban Widmark for help fixing java.io.
+
+* Mark Wielaard for new Java library code and his work integrating with
+  Classpath.
+
+* Dale Wiles helped port GCC to the Tahoe.
+
+* Bob Wilson from Tensilica, Inc. for the Xtensa port.
+
+* Jim Wilson for his direction via the steering committee, tackling hard
+  problems in various places that nobody else wanted to work on, strength
+  reduction and other loop optimizations.
+
+* Paul Woegerer and Tal Agmon for the CRX port.
+
+* Carlo Wood for various fixes.
+
+* Tom Wood for work on the m88k port.
+
+* Chung-Ju Wu for his work on the Andes NDS32 port.
+
+* Canqun Yang for work on GNU Fortran.
+
+* Masanobu Yuhara of Fujitsu Laboratories implemented the machine
+  description for the Tron architecture (specifically, the Gmicro).
+
+* Kevin Zachmann helped port GCC to the Tahoe.
+
+* Ayal Zaks for Swing Modulo Scheduling (SMS).
+
+* Qirun Zhang for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Xiaoqiang Zhang for work on GNU Fortran.
+
+* Gilles Zunino for help porting Java to Irix.
+
+The following people are recognized for their contributions to GNAT,
+the Ada front end of GCC:
+
+* Bernard Banner
+
+* Romain Berrendonner
+
+* Geert Bosch
+
+* Emmanuel Briot
+
+* Joel Brobecker
+
+* Ben Brosgol
+
+* Vincent Celier
+
+* Arnaud Charlet
+
+* Chien Chieng
+
+* Cyrille Comar
+
+* Cyrille Crozes
+
+* Robert Dewar
+
+* Gary Dismukes
+
+* Robert Duff
+
+* Ed Falis
+
+* Ramon Fernandez
+
+* Sam Figueroa
+
+* Vasiliy Fofanov
+
+* Michael Friess
+
+* Franco Gasperoni
+
+* Ted Giering
+
+* Matthew Gingell
+
+* Laurent Guerby
+
+* Jerome Guitton
+
+* Olivier Hainque
+
+* Jerome Hugues
+
+* Hristian Kirtchev
+
+* Jerome Lambourg
+
+* Bruno Leclerc
+
+* Albert Lee
+
+* Sean McNeil
+
+* Javier Miranda
+
+* Laurent Nana
+
+* Pascal Obry
+
+* Dong-Ik Oh
+
+* Laurent Pautet
+
+* Brett Porter
+
+* Thomas Quinot
+
+* Nicolas Roche
+
+* Pat Rogers
+
+* Jose Ruiz
+
+* Douglas Rupp
+
+* Sergey Rybin
+
+* Gail Schenker
+
+* Ed Schonberg
+
+* Nicolas Setton
+
+* Samuel Tardieu
+
+The following people are recognized for their contributions of new
+features, bug reports, testing and integration of classpath/libgcj for
+GCC version 4.1:
+
+* Lillian Angel for ``JTree`` implementation and lots Free Swing
+  additions and bug fixes.
+
+* Wolfgang Baer for ``GapContent`` bug fixes.
+
+* Anthony Balkissoon for ``JList``, Free Swing 1.5 updates and mouse event
+  fixes, lots of Free Swing work including ``JTable`` editing.
+
+* Stuart Ballard for RMI constant fixes.
+
+* Goffredo Baroncelli for ``HTTPURLConnection`` fixes.
+
+* Gary Benson for ``MessageFormat`` fixes.
+
+* Daniel Bonniot for ``Serialization`` fixes.
+
+* Chris Burdess for lots of gnu.xml and http protocol fixes, ``StAX``
+  and ``DOM xml:id`` support.
+
+* Ka-Hing Cheung for ``TreePath`` and ``TreeSelection`` fixes.
+
+* Archie Cobbs for build fixes, VM interface updates,
+  ``URLClassLoader`` updates.
+
+* Kelley Cook for build fixes.
+
+* Martin Cordova for Suggestions for better ``SocketTimeoutException``.
+
+* David Daney for ``BitSet`` bug fixes, ``HttpURLConnection``
+  rewrite and improvements.
+
+* Thomas Fitzsimmons for lots of upgrades to the gtk+ AWT and Cairo 2D
+  support. Lots of imageio framework additions, lots of AWT and Free
+  Swing bug fixes.
+
+* Jeroen Frijters for ``ClassLoader`` and nio cleanups, serialization fixes,
+  better ``Proxy`` support, bug fixes and IKVM integration.
+
+* Santiago Gala for ``AccessControlContext`` fixes.
+
+* Nicolas Geoffray for ``VMClassLoader`` and ``AccessController``
+  improvements.
+
+* David Gilbert for ``basic`` and ``metal`` icon and plaf support
+  and lots of documenting, Lots of Free Swing and metal theme
+  additions. ``MetalIconFactory`` implementation.
+
+* Anthony Green for ``MIDI`` framework, ``ALSA`` and ``DSSI``
+  providers.
+
+* Andrew Haley for ``Serialization`` and ``URLClassLoader`` fixes,
+  gcj build speedups.
+
+* Kim Ho for ``JFileChooser`` implementation.
+
+* Andrew John Hughes for ``Locale`` and net fixes, URI RFC2986
+  updates, ``Serialization`` fixes, ``Properties`` XML support and
+  generic branch work, VMIntegration guide update.
+
+* Bastiaan Huisman for ``TimeZone`` bug fixing.
+
+* Andreas Jaeger for mprec updates.
+
+* Paul Jenner for better :option:`-Werror` support.
+
+* Ito Kazumitsu for ``NetworkInterface`` implementation and updates.
+
+* Roman Kennke for ``BoxLayout``, ``GrayFilter`` and
+  ``SplitPane``, plus bug fixes all over. Lots of Free Swing work
+  including styled text.
+
+* Simon Kitching for ``String`` cleanups and optimization suggestions.
+
+* Michael Koch for configuration fixes, ``Locale`` updates, bug and
+  build fixes.
+
+* Guilhem Lavaux for configuration, thread and channel fixes and Kaffe
+  integration. JCL native ``Pointer`` updates. Logger bug fixes.
+
+* David Lichteblau for JCL support library global/local reference
+  cleanups.
+
+* Aaron Luchko for JDWP updates and documentation fixes.
+
+* Ziga Mahkovec for ``Graphics2D`` upgraded to Cairo 0.5 and new regex
+  features.
+
+* Sven de Marothy for BMP imageio support, CSS and ``TextLayout``
+  fixes. ``GtkImage`` rewrite, 2D, awt, free swing and date/time fixes and
+  implementing the Qt4 peers.
+
+* Casey Marshall for crypto algorithm fixes, ``FileChannel`` lock,
+  ``SystemLogger`` and ``FileHandler`` rotate implementations, NIO
+  ``FileChannel.map`` support, security and policy updates.
+
+* Bryce McKinlay for RMI work.
+
+* Audrius Meskauskas for lots of Free Corba, RMI and HTML work plus
+  testing and documenting.
+
+* Kalle Olavi Niemitalo for build fixes.
+
+* Rainer Orth for build fixes.
+
+* Andrew Overholt for ``File`` locking fixes.
+
+* Ingo Proetel for ``Image``, ``Logger`` and ``URLClassLoader``
+  updates.
+
+* Olga Rodimina for ``MenuSelectionManager`` implementation.
+
+* Jan Roehrich for ``BasicTreeUI`` and ``JTree`` fixes.
+
+* Julian Scheid for documentation updates and gjdoc support.
+
+* Christian Schlichtherle for zip fixes and cleanups.
+
+* Robert Schuster for documentation updates and beans fixes,
+  ``TreeNode`` enumerations and ``ActionCommand`` and various
+  fixes, XML and URL, AWT and Free Swing bug fixes.
+
+* Keith Seitz for lots of JDWP work.
+
+* Christian Thalinger for 64-bit cleanups, Configuration and VM
+  interface fixes and ``CACAO`` integration, ``fdlibm`` updates.
+
+* Gael Thomas for ``VMClassLoader`` boot packages support suggestions.
+
+* Andreas Tobler for Darwin and Solaris testing and fixing, ``Qt4``
+  support for Darwin/OS X, ``Graphics2D`` support, ``gtk+``
+  updates.
+
+* Dalibor Topic for better ``DEBUG`` support, build cleanups and
+  Kaffe integration. ``Qt4`` build infrastructure, ``SHA1PRNG``
+  and ``GdkPixbugDecoder`` updates.
+
+* Tom Tromey for Eclipse integration, generics work, lots of bug fixes
+  and gcj integration including coordinating The Big Merge.
+
+* Mark Wielaard for bug fixes, packaging and release management,
+  ``Clipboard`` implementation, system call interrupts and network
+  timeouts and ``GdkPixpufDecoder`` fixes.
+
+In addition to the above, all of which also contributed time and energy in
+testing GCC, we would like to thank the following for their contributions
+to testing:
+
+* Michael Abd-El-Malek
+
+* Thomas Arend
+
+* Bonzo Armstrong
+
+* Steven Ashe
+
+* Chris Baldwin
+
+* David Billinghurst
+
+* Jim Blandy
+
+* Stephane Bortzmeyer
+
+* Horst von Brand
+
+* Frank Braun
+
+* Rodney Brown
+
+* Sidney Cadot
+
+* Bradford Castalia
+
+* Robert Clark
+
+* Jonathan Corbet
+
+* Ralph Doncaster
+
+* Richard Emberson
+
+* Levente Farkas
+
+* Graham Fawcett
+
+* Mark Fernyhough
+
+* Robert A. French
+
+* Jörgen Freyh
+
+* Mark K. Gardner
+
+* Charles-Antoine Gauthier
+
+* Yung Shing Gene
+
+* David Gilbert
+
+* Simon Gornall
+
+* Fred Gray
+
+* John Griffin
+
+* Patrik Hagglund
+
+* Phil Hargett
+
+* Amancio Hasty
+
+* Takafumi Hayashi
+
+* Bryan W. Headley
+
+* Kevin B. Hendricks
+
+* Joep Jansen
+
+* Christian Joensson
+
+* Michel Kern
+
+* David Kidd
+
+* Tobias Kuipers
+
+* Anand Krishnaswamy
+
+* A.O.V. Le Blanc
+
+* llewelly
+
+* Damon Love
+
+* Brad Lucier
+
+* Matthias Klose
+
+* Martin Knoblauch
+
+* Rick Lutowski
+
+* Jesse Macnish
+
+* Stefan Morrell
+
+* Anon A. Mous
+
+* Matthias Mueller
+
+* Pekka Nikander
+
+* Rick Niles
+
+* Jon Olson
+
+* Magnus Persson
+
+* Chris Pollard
+
+* Richard Polton
+
+* Derk Reefman
+
+* David Rees
+
+* Paul Reilly
+
+* Tom Reilly
+
+* Torsten Rueger
+
+* Danny Sadinoff
+
+* Marc Schifer
+
+* Erik Schnetter
+
+* Wayne K. Schroll
+
+* David Schuler
+
+* Vin Shelton
+
+* Tim Souder
+
+* Adam Sulmicki
+
+* Bill Thorson
+
+* George Talbot
+
+* Pedro A. M. Vazquez
+
+* Gregory Warnes
+
+* Ian Watson
+
+* David E. Young
+
+* And many others
+
+And finally we'd like to thank everyone who uses the compiler, provides
+feedback and generally reminds us why we're doing this work in the first
+place.
\ No newline at end of file
diff --git a/doc/contribute.rst b/doc/contribute.rst
new file mode 100644
index 00000000000..643562efc63
--- /dev/null
+++ b/doc/contribute.rst
@@ -0,0 +1,21 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _contributing:
+
+Contributing to GCC Development
+-------------------------------
+
+If you would like to help pretest GCC releases to assure they work well,
+current development sources are available via Git (see
+https://gcc.gnu.org/git.html).  Source and binary snapshots are
+also available for FTP; see https://gcc.gnu.org/snapshots.html.
+
+If you would like to work on improvements to GCC, please read the
+advice at these URLs: https://gcc.gnu.org/contribute.html, https://gcc.gnu.org/contributewhy.html.
+
+for information on how to make useful contributions and avoid
+duplication of effort.  Suggested projects are listed at
+https://gcc.gnu.org/projects/.
\ No newline at end of file
diff --git a/doc/cppdiropts.rst b/doc/cppdiropts.rst
new file mode 100644
index 00000000000..91568fe5612
--- /dev/null
+++ b/doc/cppdiropts.rst
@@ -0,0 +1,217 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -I {dir}, -iquote {dir}, -isystem {dir}, -idirafter {dir}
+
+  Add the directory :samp:`{dir}` to the list of directories to be searched
+  for header files during preprocessing.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+  If :samp:`{dir}` begins with :samp:`=` or ``$SYSROOT``, then the :samp:`=`
+  or ``$SYSROOT`` is replaced by the sysroot prefix; see
+  :option:`--sysroot` and :option:`-isysroot`.
+
+  Directories specified with :option:`-iquote` apply only to the quote
+  form of the directive, ``#include "file"``.
+  Directories specified with :option:`-I`, :option:`-isystem`,
+  or :option:`-idirafter` apply to lookup for both the
+  ``#include "file"`` and
+  ``#include <file>`` directives.
+
+  You can specify any number or combination of these options on the
+  command line to search for header files in several directories.
+  The lookup order is as follows:
+
+  * For the quote form of the include directive, the directory of the current
+    file is searched first.
+
+  * For the quote form of the include directive, the directories specified
+    by :option:`-iquote` options are searched in left-to-right order,
+    as they appear on the command line.
+
+  * Directories specified with :option:`-I` options are scanned in
+    left-to-right order.
+
+  * Directories specified with :option:`-isystem` options are scanned in
+    left-to-right order.
+
+  * Standard system directories are scanned.
+
+  * Directories specified with :option:`-idirafter` options are scanned in
+    left-to-right order.
+
+  You can use :option:`-I` to override a system header
+  file, substituting your own version, since these directories are
+  searched before the standard system header file directories.
+  However, you should
+  not use this option to add directories that contain vendor-supplied
+  system header files; use :option:`-isystem` for that.
+
+  The :option:`-isystem` and :option:`-idirafter` options also mark the directory
+  as a system directory, so that it gets the same special treatment that
+  is applied to the standard system directories.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+  If a standard system include directory, or a directory specified with
+  :option:`-isystem`, is also specified with :option:`-I`, the :option:`-I`
+  option is ignored.  The directory is still searched but as a
+  system directory at its normal position in the system include chain.
+  This is to ensure that GCC's procedure to fix buggy system headers and
+  the ordering for the ``#include_next`` directive are not inadvertently
+  changed.
+  If you really need to change the search order for system directories,
+  use the :option:`-nostdinc` and/or :option:`-isystem` options.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+.. option:: -I-
+
+  Split the include path.
+  This option has been deprecated.  Please use :option:`-iquote` instead for
+  :option:`-I` directories before the :option:`-I-` and remove the :option:`-I-`
+  option.
+
+  Any directories specified with :option:`-I`
+  options before :option:`-I-` are searched only for headers requested with
+  ``#include "file"`` ; they are not searched for
+  ``#include <file>``.  If additional directories are
+  specified with :option:`-I` options after the :option:`-I-`, those
+  directories are searched for all :samp:`#include` directives.
+
+  In addition, :option:`-I-` inhibits the use of the directory of the current
+  file directory as the first search directory for ``#include
+  "file"``.  There is no way to override this effect of :option:`-I-`.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+
+.. option:: -iprefix {prefix}
+
+  Specify :samp:`{prefix}` as the prefix for subsequent :option:`-iwithprefix`
+  options.  If the prefix represents a directory, you should include the
+  final :samp:`/`.
+
+.. option:: -iwithprefix {dir}, -iwithprefixbefore {dir}
+
+  Append :samp:`{dir}` to the prefix specified previously with
+  :option:`-iprefix`, and add the resulting directory to the include search
+  path.  :option:`-iwithprefixbefore` puts it in the same place :option:`-I`
+  would; :option:`-iwithprefix` puts it where :option:`-idirafter` would.
+
+.. option:: -isysroot {dir}
+
+  This option is like the :option:`--sysroot` option, but applies only to
+  header files (except for Darwin targets, where it applies to both header
+  files and libraries).  See the :option:`--sysroot` option for more
+  information.
+
+.. option:: -imultilib {dir}
+
+  Use :samp:`{dir}` as a subdirectory of the directory containing
+  target-specific C++ headers.
+
+.. option:: -nostdinc
+
+  Do not search the standard system directories for header files.
+  Only the directories explicitly specified with :option:`-I`,
+  :option:`-iquote`, :option:`-isystem`, and/or :option:`-idirafter`
+  options (and the directory of the current file, if appropriate)
+  are searched.
+
+.. option:: -nostdinc++
+
+  Do not search for header files in the C++-specific standard directories,
+  but do still search the other standard directories.  (This option is
+  used when building the C++ library.)
+
+.. option:: -Wcomment, -Wcomments
+
+  Warn whenever a comment-start sequence :samp:`/*` appears in a :samp:`/*`
+  comment, or whenever a backslash-newline appears in a :samp:`//` comment.
+  This warning is enabled by :option:`-Wall`.
+
+.. option:: -Wtrigraphs
+
+.. _wtrigraphs:
+
+  Warn if any trigraphs are encountered that might change the meaning of
+  the program.  Trigraphs within comments are not warned about,
+  except those that would form escaped newlines.
+
+  This option is implied by :option:`-Wall`.  If :option:`-Wall` is not
+  given, this option is still enabled unless trigraphs are enabled.  To
+  get trigraph conversion without warnings, but get the other
+  :option:`-Wall` warnings, use :samp:`-trigraphs -Wall -Wno-trigraphs`.
+
+.. option:: -Wundef
+
+  Warn if an undefined identifier is evaluated in an ``#if`` directive.
+  Such identifiers are replaced with zero.
+
+.. option:: -Wno-undef
+
+  Default setting; overrides :option:`-Wundef`.
+
+.. option:: -Wexpansion-to-defined
+
+  Warn whenever :samp:`defined` is encountered in the expansion of a macro
+  (including the case where the macro is expanded by an :samp:`#if` directive).
+  Such usage is not portable.
+  This warning is also enabled by :option:`-Wpedantic` and :option:`-Wextra`.
+
+.. option:: -Wunused-macros
+
+  Warn about macros defined in the main file that are unused.  A macro
+  is :dfn:`used` if it is expanded or tested for existence at least once.
+  The preprocessor also warns if the macro has not been used at the
+  time it is redefined or undefined.
+
+  Built-in macros, macros defined on the command line, and macros
+  defined in include files are not warned about.
+
+  .. note::
+
+    If a macro is actually used, but only used in skipped
+    conditional blocks, then the preprocessor reports it as unused.  To avoid the
+    warning in such a case, you might improve the scope of the macro's
+    definition by, for example, moving it into the first skipped block.
+    Alternatively, you could provide a dummy use with something like:
+
+  .. code-block:: c++
+
+    #if defined the_macro_causing_the_warning
+    #endif
+
+.. option:: -Wno-endif-labels
+
+  Do not warn whenever an ``#else`` or an ``#endif`` are followed by text.
+  This sometimes happens in older programs with code of the form
+
+  .. code-block:: c++
+
+    #if FOO
+    ...
+    #else FOO
+    ...
+    #endif FOO
+
+  The second and third ``FOO`` should be in comments.
+  This warning is on by default.
+
+.. option:: -Wendif-labels
+
+  Default setting; overrides :option:`-Wno-endif-labels`.
\ No newline at end of file
diff --git a/doc/cppenv.rst b/doc/cppenv.rst
new file mode 100644
index 00000000000..f27338cfa2f
--- /dev/null
+++ b/doc/cppenv.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. envvar:: CPATH, C_INCLUDE_PATH, CPLUS_INCLUDE_PATH, OBJC_INCLUDE_PATH
+
+  .. Commented out until ObjC++ is part of GCC:
+     @itemx OBJCPLUS_INCLUDE_PATH
+
+  Each variable's value is a list of directories separated by a special
+  character, much like :envvar:`PATH`, in which to look for header files.
+  The special character, ``PATH_SEPARATOR``, is target-dependent and
+  determined at GCC build time.  For Microsoft Windows-based targets it is a
+  semicolon, and for almost all other targets it is a colon.
+
+  :envvar:`CPATH` specifies a list of directories to be searched as if
+  specified with :option:`-I`, but after any paths given with :option:`-I`
+  options on the command line.  This environment variable is used
+  regardless of which language is being preprocessed.
+
+  The remaining environment variables apply only when preprocessing the
+  particular language indicated.  Each specifies a list of directories
+  to be searched as if specified with :option:`-isystem`, but after any
+  paths given with :option:`-isystem` options on the command line.
+
+  In all these variables, an empty element instructs the compiler to
+  search its current working directory.  Empty elements can appear at the
+  beginning or end of a path.  For instance, if the value of
+  :envvar:`CPATH` is ``:/special/include``, that has the same
+  effect as :samp:`-I. -I/special/include`.
+
+  .. only:: cpp
+
+    See also :ref:`search-path`.
+
+.. index:: dependencies for make as output
+
+.. envvar:: DEPENDENCIES_OUTPUT
+
+  If this variable is set, its value specifies how to output
+  dependencies for Make based on the non-system header files processed
+  by the compiler.  System header files are ignored in the dependency
+  output.
+
+  The value of :envvar:`DEPENDENCIES_OUTPUT` can be just a file name, in
+  which case the Make rules are written to that file, guessing the target
+  name from the source file name.  Or the value can have the form
+  :samp:`{file}{target}`, in which case the rules are written to
+  file :samp:`{file}` using :samp:`{target}` as the target name.
+
+  In other words, this environment variable is equivalent to combining
+  the options :option:`-MM` and :option:`-MF`
+
+  .. only:: cpp
+
+    (see :ref:`invocation`),
+
+  .. only:: not cpp
+
+    (see :ref:`preprocessor-options`),
+
+  with an optional :option:`-MT` switch too.
+
+.. index:: dependencies for make as output
+
+.. envvar:: SUNPRO_DEPENDENCIES
+
+  This variable is the same as :envvar:`DEPENDENCIES_OUTPUT` (see above),
+  except that system header files are not ignored, so it implies
+  :option:`-M` rather than :option:`-MM`.  However, the dependence on the
+  main input file is omitted.
+
+  .. only:: cpp
+
+    See :ref:`invocation`.
+
+  .. only:: not cpp
+
+    See :ref:`preprocessor-options`.
+
+.. envvar:: SOURCE_DATE_EPOCH
+
+  If this variable is set, its value specifies a UNIX timestamp to be
+  used in replacement of the current date and time in the ``__DATE__``
+  and ``__TIME__`` macros, so that the embedded timestamps become
+  reproducible.
+
+  The value of :envvar:`SOURCE_DATE_EPOCH` must be a UNIX timestamp,
+  defined as the number of seconds (excluding leap seconds) since
+  01 Jan 1970 00:00:00 represented in ASCII; identical to the output of
+  ``date +%s`` on GNU/Linux and other systems that support the
+  ``%s`` extension in the ``date`` command.
+
+  The value should be a known timestamp such as the last modification
+  time of the source or package and it should be set by the build
+  process.
\ No newline at end of file
diff --git a/doc/cppopts.rst b/doc/cppopts.rst
new file mode 100644
index 00000000000..60d663e35d8
--- /dev/null
+++ b/doc/cppopts.rst
@@ -0,0 +1,556 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -D {name}
+
+  Predefine :samp:`{name}` as a macro, with definition ``1``.
+
+.. option:: -D name=definition
+
+  The contents of :samp:`{definition}` are tokenized and processed as if
+  they appeared during translation phase three in a :samp:`#define`
+  directive.  In particular, the definition is truncated by
+  embedded newline characters.
+
+  If you are invoking the preprocessor from a shell or shell-like
+  program you may need to use the shell's quoting syntax to protect
+  characters such as spaces that have a meaning in the shell syntax.
+
+  If you wish to define a function-like macro on the command line, write
+  its argument list with surrounding parentheses before the equals sign
+  (if any).  Parentheses are meaningful to most shells, so you should
+  quote the option.  With :command:`sh` and :command:`csh`,
+  :option:`-D'name(args...)=definition'` works.
+
+  :option:`-D` and :option:`-U` options are processed in the order they
+  are given on the command line.  All :option:`-imacros file` and
+  :option:`-include file` options are processed after all
+  :option:`-D` and :option:`-U` options.
+
+.. option:: -U {name}
+
+  Cancel any previous definition of :samp:`{name}`, either built in or
+  provided with a :option:`-D` option.
+
+.. option:: -include {file}
+
+  Process :samp:`{file}` as if ``#include "file"`` appeared as the first
+  line of the primary source file.  However, the first directory searched
+  for :samp:`{file}` is the preprocessor's working directory *instead of*
+  the directory containing the main source file.  If not found there, it
+  is searched for in the remainder of the ``#include "..."`` search
+  chain as normal.
+
+  If multiple :option:`-include` options are given, the files are included
+  in the order they appear on the command line.
+
+.. option:: -imacros {file}
+
+  Exactly like :option:`-include`, except that any output produced by
+  scanning :samp:`{file}` is thrown away.  Macros it defines remain defined.
+  This allows you to acquire all the macros from a header without also
+  processing its declarations.
+
+  All files specified by :option:`-imacros` are processed before all files
+  specified by :option:`-include`.
+
+.. option:: -undef
+
+  Do not predefine any system-specific or GCC-specific macros.  The
+  standard predefined macros remain defined.
+
+  .. only:: cpp
+
+    See :ref:`standard-predefined-macros`.
+
+.. option:: -pthread
+
+  Define additional macros required for using the POSIX threads library.
+  You should use this option consistently for both compilation and linking.
+  This option is supported on GNU/Linux targets, most other Unix derivatives,
+  and also on x86 Cygwin and MinGW targets.
+
+.. index:: make, dependencies, make
+
+.. option:: -M
+
+  Instead of outputting the result of preprocessing, output a rule
+  suitable for :command:`make` describing the dependencies of the main
+  source file.  The preprocessor outputs one :command:`make` rule containing
+  the object file name for that source file, a colon, and the names of all
+  the included files, including those coming from :option:`-include` or
+  :option:`-imacros` command-line options.
+
+  Unless specified explicitly (with :option:`-MT` or :option:`-MQ`), the
+  object file name consists of the name of the source file with any
+  suffix replaced with object file suffix and with any leading directory
+  parts removed.  If there are many included files then the rule is
+  split into several lines using :samp:`\\` -newline.  The rule has no
+  commands.
+
+  This option does not suppress the preprocessor's debug output, such as
+  :option:`-dM`.  To avoid mixing such debug output with the dependency
+  rules you should explicitly specify the dependency output file with
+  :option:`-MF`, or use an environment variable like
+  :envvar:`DEPENDENCIES_OUTPUT` (see :ref:`environment-variables`).  Debug output
+  is still sent to the regular output stream as normal.
+
+  Passing :option:`-M` to the driver implies :option:`-E`, and suppresses
+  warnings with an implicit :option:`-w`.
+
+.. option:: -MM
+
+  Like :option:`-M` but do not mention header files that are found in
+  system header directories, nor header files that are included,
+  directly or indirectly, from such a header.
+
+  This implies that the choice of angle brackets or double quotes in an
+  :samp:`#include` directive does not in itself determine whether that
+  header appears in :option:`-MM` dependency output.
+
+.. option:: -MF {file}
+
+  When used with :option:`-M` or :option:`-MM`, specifies a
+  file to write the dependencies to.  If no :option:`-MF` switch is given
+  the preprocessor sends the rules to the same place it would send
+  preprocessed output.
+
+  When used with the driver options :option:`-MD` or :option:`-MMD`,
+  :option:`-MF` overrides the default dependency output file.
+
+  If :samp:`{file}` is :samp:`-`, then the dependencies are written to :samp:`stdout`.
+
+.. option:: -MG
+
+  In conjunction with an option such as :option:`-M` requesting
+  dependency generation, :option:`-MG` assumes missing header files are
+  generated files and adds them to the dependency list without raising
+  an error.  The dependency filename is taken directly from the
+  ``#include`` directive without prepending any path.  :option:`-MG`
+  also suppresses preprocessed output, as a missing header file renders
+  this useless.
+
+  This feature is used in automatic updating of makefiles.
+
+.. option:: -Mno-modules
+
+  Disable dependency generation for compiled module interfaces.
+
+.. option:: -MP
+
+  This option instructs CPP to add a phony target for each dependency
+  other than the main file, causing each to depend on nothing.  These
+  dummy rules work around errors :command:`make` gives if you remove header
+  files without updating the :samp:`Makefile` to match.
+
+  This is typical output:
+
+  .. code-block:: c++
+
+    test.o: test.c test.h
+
+    test.h:
+
+.. option:: -MT {target}
+
+  Change the target of the rule emitted by dependency generation.  By
+  default CPP takes the name of the main input file, deletes any
+  directory components and any file suffix such as :samp:`.c`, and
+  appends the platform's usual object suffix.  The result is the target.
+
+  An :option:`-MT` option sets the target to be exactly the string you
+  specify.  If you want multiple targets, you can specify them as a single
+  argument to :option:`-MT`, or use multiple :option:`-MT` options.
+
+  For example, ``-MT '$(objpfx)foo.o'`` might give
+
+  .. code-block:: c++
+
+    $(objpfx)foo.o: foo.c
+
+.. option:: -MQ {target}
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  Make. ``-MQ '$(objpfx)foo.o'`` gives
+
+  .. code-block:: c++
+
+    $$(objpfx)foo.o: foo.c
+
+  The default target is automatically quoted, as if it were given with
+  :option:`-MQ`.
+
+.. option:: -MD
+
+  :option:`-MD` is equivalent to :option:`-M -MF file`, except that
+  :option:`-E` is not implied.  The driver determines :samp:`{file}` based on
+  whether an :option:`-o` option is given.  If it is, the driver uses its
+  argument but with a suffix of :samp:`.d`, otherwise it takes the name
+  of the input file, removes any directory components and suffix, and
+  applies a :samp:`.d` suffix.
+
+  If :option:`-MD` is used in conjunction with :option:`-E`, any
+  :option:`-o` switch is understood to specify the dependency output file
+  (see :option:`-MF`), but if used without :option:`-E`, each :option:`-o`
+  is understood to specify a target object file.
+
+  Since :option:`-E` is not implied, :option:`-MD` can be used to generate
+  a dependency output file as a side effect of the compilation process.
+
+.. option:: -MMD
+
+  Like :option:`-MD` except mention only user header files, not system
+  header files.
+
+.. option:: -fpreprocessed
+
+  Indicate to the preprocessor that the input file has already been
+  preprocessed.  This suppresses things like macro expansion, trigraph
+  conversion, escaped newline splicing, and processing of most directives.
+  The preprocessor still recognizes and removes comments, so that you can
+  pass a file preprocessed with :option:`-C` to the compiler without
+  problems.  In this mode the integrated preprocessor is little more than
+  a tokenizer for the front ends.
+
+  :option:`-fpreprocessed` is implicit if the input file has one of the
+  extensions :samp:`.i`, :samp:`.ii` or :samp:`.mi`.  These are the
+  extensions that GCC uses for preprocessed files created by
+  :option:`-save-temps`.
+
+.. option:: -fdirectives-only
+
+  When preprocessing, handle directives, but do not expand macros.
+
+  The option's behavior depends on the :option:`-E` and :option:`-fpreprocessed`
+  options.
+
+  With :option:`-E`, preprocessing is limited to the handling of directives
+  such as ``#define``, ``#ifdef``, and ``#error``.  Other
+  preprocessor operations, such as macro expansion and trigraph
+  conversion are not performed.  In addition, the :option:`-dD` option is
+  implicitly enabled.
+
+  With :option:`-fpreprocessed`, predefinition of command line and most
+  builtin macros is disabled.  Macros such as ``__LINE__``, which are
+  contextually dependent, are handled normally.  This enables compilation of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+  With both :option:`-E` and :option:`-fpreprocessed`, the rules for
+  :option:`-fpreprocessed` take precedence.  This enables full preprocessing of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+.. option:: -fdollars-in-identifiers
+
+  Accept :samp:`$` in identifiers.
+
+  .. only:: cpp
+
+    See :ref:`identifier-characters`.
+
+.. option:: -fextended-identifiers
+
+  Accept universal character names and extended characters in
+  identifiers.  This option is enabled by default for C99 (and later C
+  standard versions) and C++.
+
+.. option:: -fno-canonical-system-headers
+
+  When preprocessing, do not shorten system header paths with canonicalization.
+
+.. option:: -fmax-include-depth={depth}
+
+  Set the maximum depth of the nested #include. The default is 200.
+
+.. option:: -ftabstop={width}
+
+  Set the distance between tab stops.  This helps the preprocessor report
+  correct column numbers in warnings or errors, even if tabs appear on the
+  line.  If the value is less than 1 or greater than 100, the option is
+  ignored.  The default is 8.
+
+.. option:: -ftrack-macro-expansion[={level}]
+
+  Track locations of tokens across macro expansions. This allows the
+  compiler to emit diagnostic about the current macro expansion stack
+  when a compilation error occurs in a macro expansion. Using this
+  option makes the preprocessor and the compiler consume more
+  memory. The :samp:`{level}` parameter can be used to choose the level of
+  precision of token location tracking thus decreasing the memory
+  consumption if necessary. Value :samp:`0` of :samp:`{level}` de-activates
+  this option. Value :samp:`1` tracks tokens locations in a
+  degraded mode for the sake of minimal memory overhead. In this mode
+  all tokens resulting from the expansion of an argument of a
+  function-like macro have the same location. Value :samp:`2` tracks
+  tokens locations completely. This value is the most memory hungry.
+  When this option is given no argument, the default parameter value is
+  :samp:`2`.
+
+  Note that ``-ftrack-macro-expansion=2`` is activated by default.
+
+.. option:: -fmacro-prefix-map={old}={new}
+
+  When preprocessing files residing in directory :samp:`{old}`,
+  expand the ``__FILE__`` and ``__BASE_FILE__`` macros as if the
+  files resided in directory :samp:`{new}` instead.  This can be used
+  to change an absolute path to a relative path by using :samp:`.` for
+  :samp:`{new}` which can result in more reproducible builds that are
+  location independent.  This option also affects
+  ``__builtin_FILE()`` during compilation.  See also
+  :option:`-ffile-prefix-map`.
+
+.. index:: character set, execution
+
+.. option:: -fexec-charset={charset}
+
+  Set the execution character set, used for string and character
+  constants.  The default is UTF-8.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. index:: character set, wide execution
+
+.. option:: -fwide-exec-charset={charset}
+
+  Set the wide execution character set, used for wide string and
+  character constants.  The default is one of UTF-32BE, UTF-32LE, UTF-16BE,
+  or UTF-16LE, whichever corresponds to the width of ``wchar_t`` and the
+  big-endian or little-endian byte order being used for code generation.  As
+  with :option:`-fexec-charset`, :samp:`{charset}` can be any encoding supported
+  by the system's ``iconv`` library routine; however, you will have
+  problems with encodings that do not fit exactly in ``wchar_t``.
+
+.. index:: character set, input
+
+.. option:: -finput-charset={charset}
+
+  Set the input character set, used for translation from the character
+  set of the input file to the source character set used by GCC.  If the
+  locale does not specify, or GCC cannot get this information from the
+  locale, the default is UTF-8.  This can be overridden by either the locale
+  or this command-line option.  Currently the command-line option takes
+  precedence if there's a conflict.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. only:: not cpp
+
+  .. option:: -fpch-deps
+
+    When using precompiled headers (see :ref:`precompiled-headers`), this flag
+    causes the dependency-output flags to also list the files from the
+    precompiled header's dependencies.  If not specified, only the
+    precompiled header are listed and not the files that were used to
+    create it, because those files are not consulted when a precompiled
+    header is used.
+
+  .. option:: -fpch-preprocess
+
+    This option allows use of a precompiled header (see :ref:`precompiled-headers`) together with :option:`-E`.  It inserts a special ``#pragma``,
+    ``#pragma GCC pch_preprocess "filename"`` in the output to mark
+    the place where the precompiled header was found, and its :samp:`{filename}`.
+    When :option:`-fpreprocessed` is in use, GCC recognizes this ``#pragma``
+    and loads the PCH.
+
+    This option is off by default, because the resulting preprocessed output
+    is only really suitable as input to GCC.  It is switched on by
+    :option:`-save-temps`.
+
+    You should not write this ``#pragma`` in your own code, but it is
+    safe to edit the filename if the PCH file is available in a different
+    location.  The filename may be absolute or it may be relative to GCC's
+    current directory.
+
+.. option:: -fworking-directory
+
+  Enable generation of linemarkers in the preprocessor output that
+  let the compiler know the current working directory at the time of
+  preprocessing.  When this option is enabled, the preprocessor
+  emits, after the initial linemarker, a second linemarker with the
+  current working directory followed by two slashes.  GCC uses this
+  directory, when it's present in the preprocessed input, as the
+  directory emitted as the current working directory in some debugging
+  information formats.  This option is implicitly enabled if debugging
+  information is enabled, but this can be inhibited with the negated
+  form :option:`-fno-working-directory`.  If the :option:`-P` flag is
+  present in the command line, this option has no effect, since no
+  ``#line`` directives are emitted whatsoever.
+
+.. option:: -fno-working-directory
+
+  Default setting; overrides :option:`-fworking-directory`.
+
+.. option:: -A {predicate}={answer}
+
+  Make an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.  This form is preferred to the older form :option:`-A
+  predicate(answer)`, which is still supported, because
+  it does not use shell special characters.
+
+  .. only:: cpp
+
+    See :ref:`obsolete-features`.
+
+.. option:: -A -predicate=answer
+
+  Cancel an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.
+
+.. option:: -C
+
+  Do not discard comments.  All comments are passed through to the output
+  file, except for comments in processed directives, which are deleted
+  along with the directive.
+
+  You should be prepared for side effects when using :option:`-C` ; it
+  causes the preprocessor to treat comments as tokens in their own right.
+  For example, comments appearing at the start of what would be a
+  directive line have the effect of turning that line into an ordinary
+  source line, since the first token on the line is no longer a :samp:`#`.
+
+.. option:: -CC
+
+  Do not discard comments, including during macro expansion.  This is
+  like :option:`-C`, except that comments contained within macros are
+  also passed through to the output file where the macro is expanded.
+
+  In addition to the side effects of the :option:`-C` option, the
+  :option:`-CC` option causes all C++-style comments inside a macro
+  to be converted to C-style comments.  This is to prevent later use
+  of that macro from inadvertently commenting out the remainder of
+  the source line.
+
+  The :option:`-CC` option is generally used to support lint comments.
+
+.. option:: -P
+
+  Inhibit generation of linemarkers in the output from the preprocessor.
+  This might be useful when running the preprocessor on something that is
+  not C code, and will be sent to a program which might be confused by the
+  linemarkers.
+
+  .. only:: cpp
+
+    See :ref:`preprocessor-output`.
+
+  .. index:: traditional C language, C language, traditional
+
+.. option:: -traditional, -traditional-cpp
+
+  Try to imitate the behavior of pre-standard C preprocessors, as
+  opposed to ISO C preprocessors.
+
+  .. only:: cpp
+
+    See :ref:`traditional-mode`.
+
+  .. only:: not cpp
+
+    See the GNU CPP manual for details.
+
+  Note that GCC does not otherwise attempt to emulate a pre-standard
+  C compiler, and these options are only supported with the :option:`-E`
+  switch, or when invoking CPP explicitly.
+
+.. option:: -trigraphs
+
+  Support ISO C trigraphs.
+  These are three-character sequences, all starting with :samp:`??`, that
+  are defined by ISO C to stand for single characters.  For example,
+  :samp:`??/` stands for :samp:`\\`, so :samp:`??/n` is a character
+  constant for a newline.
+
+  .. only:: cpp
+
+    See :ref:`initial-processing`.
+
+  .. only:: not cpp
+
+    The nine trigraphs and their replacements are
+
+    .. code-block::
+
+      Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+      Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+  By default, GCC ignores trigraphs, but in
+  standard-conforming modes it converts them.  See the :option:`-std` and
+  :option:`-ansi` options.
+
+.. option:: -remap
+
+  Enable special code to work around file systems which only permit very
+  short file names, such as MS-DOS.
+
+.. option:: -H
+
+  Print the name of each header file used, in addition to other normal
+  activities.  Each name is indented to show how deep in the
+  :samp:`#include` stack it is.  Precompiled header files are also
+  printed, even if they are found to be invalid; an invalid precompiled
+  header file is printed with :samp:`...x` and a valid one with :samp:`...!` .
+
+.. option:: -dletters
+
+  Says to make debugging dumps during compilation as specified by
+  :samp:`{letters}`.  The flags documented here are those relevant to the
+  preprocessor.  Other :samp:`{letters}` are interpreted
+  by the compiler proper, or reserved for future versions of GCC, and so
+  are silently ignored.  If you specify :samp:`{letters}` whose behavior
+  conflicts, the result is undefined.
+
+  .. only:: not cpp
+
+    See :ref:`developer-options`, for more information.
+
+  .. option:: -dM
+
+    Instead of the normal output, generate a list of :samp:`#define`
+    directives for all the macros defined during the execution of the
+    preprocessor, including predefined macros.  This gives you a way of
+    finding out what is predefined in your version of the preprocessor.
+    Assuming you have no file :samp:`foo.h`, the command
+
+    .. code-block:: c++
+
+      touch foo.h; cpp -dM foo.h
+
+    shows all the predefined macros.
+
+    .. only:: cpp
+
+      If you use :option:`-dM` without the :option:`-E` option, :option:`-dM` is
+      interpreted as a synonym for :option:`-fdump-rtl-mach`.
+      See :ref:`developer-options`.
+
+  .. option:: -dD
+
+    Like :option:`-dM` except in two respects: it does *not* include the
+    predefined macros, and it outputs *both* the :samp:`#define`
+    directives and the result of preprocessing.  Both kinds of output go to
+    the standard output file.
+
+  .. option:: -dN
+
+    Like :option:`-dD`, but emit only the macro names, not their expansions.
+
+  .. option:: -dI
+
+    Output :samp:`#include` directives in addition to the result of
+    preprocessing.
+
+  .. option:: -dU
+
+    Like :option:`-dD` except that only macros that are expanded, or whose
+    definedness is tested in preprocessor directives, are output; the
+    output is delayed until the use or test of the macro; and
+    :samp:`#undef` directives are also output for macros tested but
+    undefined at the time.
+
+.. option:: -fdebug-cpp
+
+  This option is only useful for debugging GCC.  When used from CPP or with
+  :option:`-E`, it dumps debugging information about location maps.  Every
+  token in the output is preceded by the dump of the map its location
+  belongs to.
+
+  When used from GCC without :option:`-E`, this option has no effect.
\ No newline at end of file
diff --git a/doc/cppwarnopts.rst b/doc/cppwarnopts.rst
new file mode 100644
index 00000000000..8e9e9e7276f
--- /dev/null
+++ b/doc/cppwarnopts.rst
@@ -0,0 +1,4 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
\ No newline at end of file
diff --git a/doc/favicon.ico b/doc/favicon.ico
new file mode 100644
index 00000000000..42e8969edc8
Binary files /dev/null and b/doc/favicon.ico differ
diff --git a/doc/funding.rst b/doc/funding.rst
new file mode 100644
index 00000000000..ee4daca6fd7
--- /dev/null
+++ b/doc/funding.rst
@@ -0,0 +1,47 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+Funding Free Software
+=====================
+
+If you want to have more free software a few years from now, it makes
+sense for you to help encourage people to contribute funds for its
+development.  The most effective approach known is to encourage
+commercial redistributors to donate.
+
+Users of free software systems can boost the pace of development by
+encouraging for-a-fee distributors to donate part of their selling price
+to free software developers-the Free Software Foundation, and others.
+
+The way to convince distributors to do this is to demand it and expect
+it from them.  So when you compare distributors, judge them partly by
+how much they give to free software development.  Show distributors
+they must compete to be the one who gives the most.
+
+To make this approach work, you must insist on numbers that you can
+compare, such as, 'We will donate ten dollars to the Frobnitz project
+for each disk sold.'  Don't be satisfied with a vague promise, such as
+'A portion of the profits are donated,' since it doesn't give a basis
+for comparison.
+
+Even a precise fraction 'of the profits from this disk' is not very
+meaningful, since creative accounting and unrelated business decisions
+can greatly alter what fraction of the sales price counts as profit.
+If the price you pay is $50, ten percent of the profit is probably
+less than a dollar; it might be a few cents, or nothing at all.
+
+Some redistributors do development work themselves.  This is useful too;
+but to keep everyone honest, you need to inquire how much they do, and
+what kind.  Some kinds of development make much more long-term
+difference than others.  For example, maintaining a separate version of
+a program contributes very little; maintaining the standard version of a
+program for the whole community contributes much.  Easy new ports
+contribute little, since someone else would surely do them; difficult
+ports such as adding a new CPU to the GNU Compiler Collection contribute more;
+major new features or packages contribute the most.
+
+By establishing the idea that supporting further development is 'the
+proper thing to do' when distributing free software for a fee, we can
+assure a steady flow of resources into making more free software.
\ No newline at end of file
diff --git a/doc/gcc_sphinx.py b/doc/gcc_sphinx.py
new file mode 100644
index 00000000000..2ef15aef944
--- /dev/null
+++ b/doc/gcc_sphinx.py
@@ -0,0 +1,44 @@
+# GCC Sphinx customization
+
+__version__ = '1.0'
+
+
+def setup(app):
+    app.add_object_type('gcc-attr', 'gcc-attr', objname='GCC attribute',
+                        indextemplate='pair: %s; attribute')
+    app.add_object_type('fn-attr', 'fn-attr', objname='function attribute',
+                        indextemplate='pair: %s; function attribute')
+    app.add_object_type('var-attr', 'var-attr', objname='variable attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('type-attr', 'type-attr', objname='type attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('enum-attr', 'enum-attr', objname='Enumerator attribute',
+                        indextemplate='pair: %s; enumerator attribute')
+    app.add_object_type('label-attr', 'label-attr', objname='Label attribute',
+                        indextemplate='pair: %s; label attribute')
+    app.add_object_type('gcc-param', 'gcc-param', objname='GCC parameter',
+                        indextemplate='pair: %s; parameter')
+
+    targets = (('AArch64 ', 'aarch64'), ('AMD GCN ', 'amd-gcn'), ('ARC ', 'arc'), ('ARM ', 'arm'), ('AVR ', 'avr'),
+               ('Blackfin ', 'blackfin'), ('BPF ', 'bpf'), ('C-SKY ', 'c-sky'),
+               ('Epiphany ', 'epiphany'), ('H8/300 ', 'h8-300'), ('IA-64 ', 'ia-64'), ('LoongArch', 'loongarch'), ('M32C ', 'm32c'),
+               ('M32R/D ', 'm32r-d'), ('m68k ', 'm68k'), ('MCORE ', 'mcore'), ('MeP ', 'mep'),
+               ('MicroBlaze ', 'microblaze'), ('Microsoft Windows ', 'microsoft-windows'), ('MIPS ', 'mips'),
+               ('MSP430 ', 'msp430'), ('NDS32 ', 'nds32'), ('Nios II ', 'nios-ii'), ('Nvidia PTX ', 'nvidia-ptx'),
+               ('PowerPC ', 'powerpc'), ('RISC-V ', 'risc-v'), ('RL78 ', 'rl78'), ('RX ', 'rx'), ('S/390 ', 's-390'),
+               ('SH ', 'sh'), ('Symbian OS ', 'symbian-os'), ('V850 ', 'v850'), ('Visium ', 'visium'), ('x86 ', 'x86'),
+               ('Xstormy16 ', 'xstormy16'))
+
+    for target_name, target in targets:
+        app.add_object_type(f'{target}-fn-attr', f'{target}-fn-attr', objname=f'{target_name} function attribute',
+                            indextemplate=f'pair: %s; {target_name} function attribute')
+        app.add_object_type(f'{target}-var-attr', f'{target}-var-attr', objname=f'{target_name} variable attribute',
+                            indextemplate=f'pair: %s; {target_name} variable attribute')
+        app.add_object_type(f'{target}-type-attr', f'{target}-type-attr', objname=f'{target_name} type attribute',
+                            indextemplate=f'pair: %s; {target_name} type attribute')
+
+    return dict(
+        version=__version__,
+        parallel_read_safe=True,
+        parallel_write_safe=True
+    )
diff --git a/doc/gnu.rst b/doc/gnu.rst
new file mode 100644
index 00000000000..930659b250b
--- /dev/null
+++ b/doc/gnu.rst
@@ -0,0 +1,19 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu-project:
+
+The GNU Project and GNU/Linux
+=============================
+
+The GNU Project was launched in 1984 to develop a complete Unix-like
+operating system which is free software: the GNU system.  (GNU is a
+recursive acronym for 'GNU's Not Unix'; it is pronounced
+'guh-NEW'.)  Variants of the GNU operating system, which use the
+kernel Linux, are now widely used; though these systems are often
+referred to as 'Linux', they are more accurately called GNU/Linux
+systems.
+
+For more information, see: https://www.gnu.org/ and https://www.gnu.org/gnu/linux-and-gnu.html.
\ No newline at end of file
diff --git a/doc/gnu_free_documentation_license.rst b/doc/gnu_free_documentation_license.rst
new file mode 100644
index 00000000000..5a7d110efde
--- /dev/null
+++ b/doc/gnu_free_documentation_license.rst
@@ -0,0 +1,476 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu_fdl:
+
+******************************
+GNU Free Documentation License
+******************************
+
+Version 1.3, 3 November 2008
+
+Copyright  2000, 2001, 2002, 2007, 2008  Free Software Foundation, Inc
+https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+~~~~~~~~
+
+The purpose of this License is to make a manual, textbook, or other
+functional and useful document "free" in the sense of freedom: to
+assure everyone the effective freedom to copy and redistribute it,
+with or without modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and publisher a way
+to get credit for their work, while not being considered responsible
+for modifications made by others.
+
+This License is a kind of "copyleft", which means that derivative
+works of the document must themselves be free in the same sense.  It
+complements the GNU General Public License, which is a copyleft
+license designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free
+program should come with manuals providing the same freedoms that the
+software does.  But this License is not limited to software manuals;
+it can be used for any textual work, regardless of subject matter or
+whether it is published as a printed book.  We recommend this License
+principally for works whose purpose is instruction or reference.
+
+1. APPLICABILITY AND DEFINITIONS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This License applies to any manual or other work, in any medium, that
+contains a notice placed by the copyright holder saying it can be
+distributed under the terms of this License.  Such a notice grants a
+world-wide, royalty-free license, unlimited in duration, to use that
+work under the conditions stated herein.  The **Document**, below,
+refers to any such manual or work.  Any member of the public is a
+licensee, and is addressed as "**you**".  You accept the license if you
+copy, modify or distribute the work in a way requiring permission
+under copyright law.
+
+A "**Modified Version**" of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+A "**Secondary Section**" is a named appendix or a front-matter section of
+the Document that deals exclusively with the relationship of the
+publishers or authors of the Document to the Document's overall subject
+(or to related matters) and contains nothing that could fall directly
+within that overall subject.  (Thus, if the Document is in part a
+textbook of mathematics, a Secondary Section may not explain any
+mathematics.)  The relationship could be a matter of historical
+connection with the subject or with related matters, or of legal,
+commercial, philosophical, ethical or political position regarding
+them.
+
+The "**Invariant Sections**" are certain Secondary Sections whose titles
+are designated, as being those of Invariant Sections, in the notice
+that says that the Document is released under this License.  If a
+section does not fit the above definition of Secondary then it is not
+allowed to be designated as Invariant.  The Document may contain zero
+Invariant Sections.  If the Document does not identify any Invariant
+Sections then there are none.
+
+The "**Cover Texts**" are certain short passages of text that are listed,
+as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+the Document is released under this License.  A Front-Cover Text may
+be at most 5 words, and a Back-Cover Text may be at most 25 words.
+
+A "**Transparent**" copy of the Document means a machine-readable copy,
+represented in a format whose specification is available to the
+general public, that is suitable for revising the document
+straightforwardly with generic text editors or (for images composed of
+pixels) generic paint programs or (for drawings) some widely available
+drawing editor, and that is suitable for input to text formatters or
+for automatic translation to a variety of formats suitable for input
+to text formatters.  A copy made in an otherwise Transparent file
+format whose markup, or absence of markup, has been arranged to thwart
+or discourage subsequent modification by readers is not Transparent.
+An image format is not Transparent if used for any substantial amount
+of text.  A copy that is not "Transparent" is called **Opaque**.
+
+Examples of suitable formats for Transparent copies include plain
+ASCII without markup, Texinfo input format, LaTeX input format, SGML
+or XML using a publicly available DTD, and standard-conforming simple
+HTML, PostScript or PDF designed for human modification.  Examples of
+transparent image formats include PNG, XCF and JPG.  Opaque formats
+include proprietary formats that can be read and edited only by
+proprietary word processors, SGML or XML for which the DTD and/or
+processing tools are not generally available, and the
+machine-generated HTML, PostScript or PDF produced by some word
+processors for output purposes only.
+
+The "**Title Page**" means, for a printed book, the title page itself,
+plus such following pages as are needed to hold, legibly, the material
+this License requires to appear in the title page.  For works in
+formats which do not have any title page as such, "Title Page" means
+the text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+The "**publisher**" means any person or entity that distributes
+copies of the Document to the public.
+
+A section "**Entitled XYZ**" means a named subunit of the Document whose
+title either is precisely XYZ or contains XYZ in parentheses following
+text that translates XYZ in another language.  (Here XYZ stands for a
+specific section name mentioned below, such as "**Acknowledgements**",
+"**Dedications**", "**Endorsements**", or "**History**".)
+To "**Preserve the Title**"
+of such a section when you modify the Document means that it remains a
+section "Entitled XYZ" according to this definition.
+
+The Document may include Warranty Disclaimers next to the notice which
+states that this License applies to the Document.  These Warranty
+Disclaimers are considered to be included by reference in this
+License, but only as regards disclaiming warranties: any other
+implication that these Warranty Disclaimers may have is void and has
+no effect on the meaning of this License.
+
+2. VERBATIM COPYING
+~~~~~~~~~~~~~~~~~~~
+
+You may copy and distribute the Document in any medium, either
+commercially or noncommercially, provided that this License, the
+copyright notices, and the license notice saying this License applies
+to the Document are reproduced in all copies, and that you add no other
+conditions whatsoever to those of this License.  You may not use
+technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute.  However, you may accept
+compensation in exchange for copies.  If you distribute a large enough
+number of copies you must also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+3. COPYING IN QUANTITY
+~~~~~~~~~~~~~~~~~~~~~~
+
+If you publish printed copies (or copies in media that commonly have
+printed covers) of the Document, numbering more than 100, and the
+Document's license notice requires Cover Texts, you must enclose the
+copies in covers that carry, clearly and legibly, all these Cover
+Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+the back cover.  Both covers must also clearly and legibly identify
+you as the publisher of these copies.  The front cover must present
+the full title with all words of the title equally prominent and
+visible.  You may add other material on the covers in addition.
+Copying with changes limited to the covers, as long as they preserve
+the title of the Document and satisfy these conditions, can be treated
+as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute Opaque copies of the Document numbering
+more than 100, you must either include a machine-readable Transparent
+copy along with each Opaque copy, or state in or with each Opaque copy
+a computer-network location from which the general network-using
+public has access to download using public-standard network protocols
+a complete Transparent copy of the Document, free of added material.
+If you use the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity, to ensure
+that this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you distribute an
+Opaque copy (directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the authors of the
+Document well before redistributing any large number of copies, to give
+them a chance to provide you with an updated version of the Document.
+
+4. MODIFICATIONS
+~~~~~~~~~~~~~~~~
+
+You may copy and distribute a Modified Version of the Document under
+the conditions of sections 2 and 3 above, provided that you release
+the Modified Version under precisely this License, with the Modified
+Version filling the role of the Document, thus licensing distribution
+and modification of the Modified Version to whoever possesses a copy
+of it.  In addition, you must do these things in the Modified Version:
+
+A. Use in the Title Page (and on the covers, if any) a title distinct
+   from that of the Document, and from those of previous versions
+   (which should, if there were any, be listed in the History section
+   of the Document).  You may use the same title as a previous version
+   if the original publisher of that version gives permission.
+
+B. List on the Title Page, as authors, one or more persons or entities
+   responsible for authorship of the modifications in the Modified
+   Version, together with at least five of the principal authors of the
+   Document (all of its principal authors, if it has fewer than five),
+   unless they release you from this requirement.
+
+C. State on the Title page the name of the publisher of the
+   Modified Version, as the publisher.
+
+D. Preserve all the copyright notices of the Document.
+
+E. Add an appropriate copyright notice for your modifications
+   adjacent to the other copyright notices.
+
+F. Include, immediately after the copyright notices, a license notice
+   giving the public permission to use the Modified Version under the
+   terms of this License, in the form shown in the Addendum below.
+
+G. Preserve in that license notice the full lists of Invariant Sections
+   and required Cover Texts given in the Document's license notice.
+H. Include an unaltered copy of this License.
+
+I. Preserve the section Entitled "History", Preserve its Title, and add
+   to it an item stating at least the title, year, new authors, and
+   publisher of the Modified Version as given on the Title Page.  If
+   there is no section Entitled "History" in the Document, create one
+   stating the title, year, authors, and publisher of the Document as
+   given on its Title Page, then add an item describing the Modified
+   Version as stated in the previous sentence.
+
+J. Preserve the network location, if any, given in the Document for
+   public access to a Transparent copy of the Document, and likewise
+   the network locations given in the Document for previous versions
+   it was based on.  These may be placed in the "History" section.
+   You may omit a network location for a work that was published at
+   least four years before the Document itself, or if the original
+   publisher of the version it refers to gives permission.
+
+K. For any section Entitled "Acknowledgements" or "Dedications",
+   Preserve the Title of the section, and preserve in the section all
+   the substance and tone of each of the contributor acknowledgements
+   and/or dedications given therein.
+
+L. Preserve all the Invariant Sections of the Document,
+   unaltered in their text and in their titles.  Section numbers
+   or the equivalent are not considered part of the section titles.
+
+M. Delete any section Entitled "Endorsements".  Such a section
+   may not be included in the Modified Version.
+
+N. Do not retitle any existing section to be Entitled "Endorsements"
+   or to conflict in title with any Invariant Section.
+
+O. Preserve any Warranty Disclaimers.
+
+If the Modified Version includes new front-matter sections or
+appendices that qualify as Secondary Sections and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant.  To do this, add their titles to the
+list of Invariant Sections in the Modified Version's license notice.
+These titles must be distinct from any other section titles.
+
+You may add a section Entitled "Endorsements", provided it contains
+nothing but endorsements of your Modified Version by various
+parties---for example, statements of peer review or that the text has
+been approved by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover Text, and a
+passage of up to 25 words as a Back-Cover Text, to the end of the list
+of Cover Texts in the Modified Version.  Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or
+through arrangements made by) any one entity.  If the Document already
+includes a cover text for the same cover, previously added by you or
+by arrangement made by the same entity you are acting on behalf of,
+you may not add another; but you may replace the old one, on explicit
+permission from the previous publisher that added the old one.
+
+The author(s) and publisher(s) of the Document do not by this License
+give permission to use their names for publicity for or to assert or
+imply endorsement of any Modified Version.
+
+5. COMBINING DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~
+
+You may combine the Document with other documents released under this
+License, under the terms defined in section 4 above for modified
+versions, provided that you include in the combination all of the
+Invariant Sections of all of the original documents, unmodified, and
+list them all as Invariant Sections of your combined work in its
+license notice, and that you preserve all their Warranty Disclaimers.
+
+The combined work need only contain one copy of this License, and
+multiple identical Invariant Sections may be replaced with a single
+copy.  If there are multiple Invariant Sections with the same name but
+different contents, make the title of each such section unique by
+adding at the end of it, in parentheses, the name of the original
+author or publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list of
+Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections Entitled "History"
+in the various original documents, forming one section Entitled
+"History"; likewise combine any sections Entitled "Acknowledgements",
+and any sections Entitled "Dedications".  You must delete all sections
+Entitled "Endorsements".
+
+6. COLLECTIONS OF DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+You may make a collection consisting of the Document and other documents
+released under this License, and replace the individual copies of this
+License in the various documents with a single copy that is included in
+the collection, provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+7. AGGREGATION WITH INDEPENDENT WORKS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A compilation of the Document or its derivatives with other separate
+and independent documents or works, in or on a volume of a storage or
+distribution medium, is called an "aggregate" if the copyright
+resulting from the compilation is not used to limit the legal rights
+of the compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License does not
+apply to the other works in the aggregate which are not themselves
+derivative works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to these
+copies of the Document, then if the Document is less than one half of
+the entire aggregate, the Document's Cover Texts may be placed on
+covers that bracket the Document within the aggregate, or the
+electronic equivalent of covers if the Document is in electronic form.
+Otherwise they must appear on printed covers that bracket the whole
+aggregate.
+
+8. TRANSLATION
+~~~~~~~~~~~~~~
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of section 4.
+Replacing Invariant Sections with translations requires special
+permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections.  You may include a
+translation of this License, and all the license notices in the
+Document, and any Warranty Disclaimers, provided that you also include
+the original English version of this License and the original versions
+of those notices and disclaimers.  In case of a disagreement between
+the translation and the original version of this License or a notice
+or disclaimer, the original version will prevail.
+
+If a section in the Document is Entitled "Acknowledgements",
+"Dedications", or "History", the requirement (section 4) to Preserve
+its Title (section 1) will typically require changing the actual
+title.
+
+9. TERMINATION
+~~~~~~~~~~~~~~
+
+You may not copy, modify, sublicense, or distribute the Document
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense, or distribute it is void, and
+will automatically terminate your rights under this License.
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, receipt of a copy of some or all of the same material does
+not give you any rights to use it.
+
+10. FUTURE REVISIONS OF THIS LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The Free Software Foundation may publish new, revised versions
+of the GNU Free Documentation License from time to time.  Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.  See
+https://www.gnu.org/copyleft/.
+
+Each version of the License is given a distinguishing version number.
+If the Document specifies that a particular numbered version of this
+License "or any later version" applies to it, you have the option of
+following the terms and conditions either of that specified version or
+of any later version that has been published (not as a draft) by the
+Free Software Foundation.  If the Document does not specify a version
+number of this License, you may choose any version ever published (not
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+specifies that a proxy can decide which future versions of this
+License can be used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version for the
+Document.
+
+11. RELICENSING
+~~~~~~~~~~~~~~~
+
+"Massive Multiauthor Collaboration Site" (or "MMC Site") means any
+World Wide Web server that publishes copyrightable works and also
+provides prominent facilities for anybody to edit those works.  A
+public wiki that anybody can edit is an example of such a server.  A
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+site means any set of copyrightable works thus published on the MMC
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+
+"CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
+license published by Creative Commons Corporation, a not-for-profit
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+California, as well as future copyleft versions of that license
+published by that same organization.
+
+"Incorporate" means to publish or republish a Document, in whole or
+in part, as part of another Document.
+
+An MMC is "eligible for relicensing" if it is licensed under this
+License, and if all works that were first published under this License
+somewhere other than this MMC, and subsequently incorporated in whole
+or in part into the MMC, (1) had no cover texts or invariant sections,
+and (2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained in the site
+under CC-BY-SA on the same site at any time before August 1, 2009,
+provided the MMC is eligible for relicensing.
+
+ADDENDUM: How to use this License for your documents
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and
+license notices just after the title page:
+
+    Copyright © YEAR  YOUR NAME.
+    Permission is granted to copy, distribute and/or modify this document
+    under the terms of the GNU Free Documentation License, Version 1.3
+    or any later version published by the Free Software Foundation;
+    with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+    A copy of the license is included in the section entitled "GNU
+    Free Documentation License".
+
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the "with ... Texts." line with this:
+
+    with the Invariant Sections being LIST THEIR TITLES, with the
+    Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
+
+If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of
+free software license, such as the GNU General Public License,
+to permit their use in free software.
\ No newline at end of file
diff --git a/doc/gpl-3.0.rst b/doc/gpl-3.0.rst
new file mode 100644
index 00000000000..07ffd72b375
--- /dev/null
+++ b/doc/gpl-3.0.rst
@@ -0,0 +1,707 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU GENERAL PUBLIC LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Version 3, 29 June 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+########
+
+The GNU General Public License is a free, copyleft license for software
+and other kinds of works.
+
+The licenses for most software and other practical works are designed to
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+
+To protect your rights, we need to prevent others from denying you these
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+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+For example, if you distribute copies of such a program, whether gratis
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+Developers that use the GNU GPL protect your rights with two steps: (1)
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+The precise terms and conditions for copying, distribution and
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+
+TERMS AND CONDITIONS
+####################
+
+0. Definitions.
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+"This License" refers to version 3 of the GNU General Public License.
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+The "source code" for a work means the preferred form of the work for
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+^^^^^^^^^^^^^^^^^^^^^
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+All rights granted under this License are granted for the term of
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+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+7. Additional Terms.
+^^^^^^^^^^^^^^^^^^^^
+
+"Additional permissions" are terms that supplement the terms of this
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+Additional permissions that are applicable to the entire Program shall
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+^^^^^^^^^^^^^^^
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+9. Acceptance Not Required for Having Copies.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+10. Automatic Licensing of Downstream Recipients.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
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+patent claim is infringed by making, using, selling, offering for sale,
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+11. Patents.
+^^^^^^^^^^^^
+
+A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The work
+thus licensed is called the contributor's "contributor version".
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+
+How to Apply These Terms to Your New Programs
+#############################################
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+
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+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice
+like this when it starts in an interactive mode:
+
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+
+        <program>  Copyright (C) <year>  <name of author>
+        This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+        This is free software, and you are welcome to redistribute it
+        under certain conditions; type `show c' for details.
+
+The hypothetical commands \`show w' and \`show c' should show the
+appropriate parts of the General Public License. Of course, your
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+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow the
+GNU GPL, see https://www.gnu.org/licenses/.
+
+The GNU General Public License does not permit incorporating your
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+GNU Lesser General Public License instead of this License. But first,
+please read https://www.gnu.org/licenses/why-not-lgpl.html.
\ No newline at end of file
diff --git a/doc/indices-and-tables.rst b/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..92bf73bcb0a
--- /dev/null
+++ b/doc/indices-and-tables.rst
@@ -0,0 +1,13 @@
+.. only:: html
+
+  Indexes and tables
+  ==================
+
+  :ref:`genindex`
+
+  .. only:: development
+
+    TODO
+    ----
+
+    .. todolist::
\ No newline at end of file
diff --git a/doc/lgpl-2.1.rst b/doc/lgpl-2.1.rst
new file mode 100644
index 00000000000..845de30d8d4
--- /dev/null
+++ b/doc/lgpl-2.1.rst
@@ -0,0 +1,514 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU LESSER GENERAL PUBLIC LICENSE
+---------------------------------
+
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+
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+#. The Free Software Foundation may publish revised and/or new
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+How to Apply These Terms to Your New Libraries
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
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+To apply these terms, attach the following notices to the library.  It is
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+
+.. code-block::
+
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+    Copyright (C) year  name of author
+
+    This library is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or (at
+    your option) any later version.
+
+    This library is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+    USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a 'copyright disclaimer' for the library, if
+necessary.  Here is a sample; alter the names:
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+.. code-block::
+
+    Yoyodyne, Inc., hereby disclaims all copyright interest in the library
+    `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+    signature of Ty Coon, 1 April 1990
+    Ty Coon, President of Vice
+
+That's all there is to it!
\ No newline at end of file
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diff --git a/doc/md.rst b/doc/md.rst
new file mode 100644
index 00000000000..55e0711113e
--- /dev/null
+++ b/doc/md.rst
@@ -0,0 +1,3142 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: simple constraints
+
+.. _simple-constraints:
+
+Simple Constraints
+^^^^^^^^^^^^^^^^^^
+
+The simplest kind of constraint is a string full of letters, each of
+which describes one kind of operand that is permitted.  Here are
+the letters that are allowed:
+
+whitespace
+  Whitespace characters are ignored and can be inserted at any position
+  except the first.  This enables each alternative for different operands to
+  be visually aligned in the machine description even if they have different
+  number of constraints and modifiers.
+
+  .. index:: m in constraint, memory references in constraints
+
+m
+  A memory operand is allowed, with any kind of address that the machine
+  supports in general.
+  Note that the letter used for the general memory constraint can be
+  re-defined by a back end using the ``TARGET_MEM_CONSTRAINT`` macro.
+
+  .. index:: offsettable address, o in constraint
+
+o
+  A memory operand is allowed, but only if the address is
+  :dfn:`offsettable`.  This means that adding a small integer (actually,
+  the width in bytes of the operand, as determined by its machine mode)
+  may be added to the address and the result is also a valid memory
+  address.
+
+  .. index:: autoincrement/decrement addressing
+
+  For example, an address which is constant is offsettable; so is an
+  address that is the sum of a register and a constant (as long as a
+  slightly larger constant is also within the range of address-offsets
+  supported by the machine); but an autoincrement or autodecrement
+  address is not offsettable.  More complicated indirect/indexed
+  addresses may or may not be offsettable depending on the other
+  addressing modes that the machine supports.
+
+  Note that in an output operand which can be matched by another
+  operand, the constraint letter :samp:`o` is valid only when accompanied
+  by both :samp:`<` (if the target machine has predecrement addressing)
+  and :samp:`>` (if the target machine has preincrement addressing).
+
+  .. index:: V in constraint
+
+V
+  A memory operand that is not offsettable.  In other words, anything that
+  would fit the :samp:`m` constraint but not the :samp:`o` constraint.
+
+  .. index:: < in constraint
+
+<
+  A memory operand with autodecrement addressing (either predecrement or
+  postdecrement) is allowed.  In inline ``asm`` this constraint is only
+  allowed if the operand is used exactly once in an instruction that can
+  handle the side effects.  Not using an operand with :samp:`<` in constraint
+  string in the inline ``asm`` pattern at all or using it in multiple
+  instructions isn't valid, because the side effects wouldn't be performed
+  or would be performed more than once.  Furthermore, on some targets
+  the operand with :samp:`<` in constraint string must be accompanied by
+  special instruction suffixes like ``%U0`` instruction suffix on PowerPC
+  or ``%P0`` on IA-64.
+
+  .. index:: > in constraint
+
+>
+  A memory operand with autoincrement addressing (either preincrement or
+  postincrement) is allowed.  In inline ``asm`` the same restrictions
+  as for :samp:`<` apply.
+
+  .. index:: r in constraint, registers in constraints
+
+r
+  A register operand is allowed provided that it is in a general
+  register.
+
+  .. index:: constants in constraints, i in constraint
+
+i
+  An immediate integer operand (one with constant value) is allowed.
+  This includes symbolic constants whose values will be known only at
+  assembly time or later.
+
+  .. index:: n in constraint
+
+n
+  An immediate integer operand with a known numeric value is allowed.
+  Many systems cannot support assembly-time constants for operands less
+  than a word wide.  Constraints for these operands should use :samp:`n`
+  rather than :samp:`i`.
+
+  .. index:: I in constraint
+
+:samp:`{I}, {J}, {K}, ... {P}`
+  Other letters in the range :samp:`I` through :samp:`P` may be defined in
+  a machine-dependent fashion to permit immediate integer operands with
+  explicit integer values in specified ranges.  For example, on the
+  68000, :samp:`I` is defined to stand for the range of values 1 to 8.
+  This is the range permitted as a shift count in the shift
+  instructions.
+
+  .. index:: E in constraint
+
+E
+  An immediate floating operand (expression code ``const_double``) is
+  allowed, but only if the target floating point format is the same as
+  that of the host machine (on which the compiler is running).
+
+  .. index:: F in constraint
+
+F
+  An immediate floating operand (expression code ``const_double`` or
+  ``const_vector``) is allowed.
+
+  .. index:: G in constraint, H in constraint
+
+:samp:`{G}, {H}`
+  :samp:`G` and :samp:`H` may be defined in a machine-dependent fashion to
+  permit immediate floating operands in particular ranges of values.
+
+  .. index:: s in constraint
+
+s
+  An immediate integer operand whose value is not an explicit integer is
+  allowed.
+
+  This might appear strange; if an insn allows a constant operand with a
+  value not known at compile time, it certainly must allow any known
+  value.  So why use :samp:`s` instead of :samp:`i`?  Sometimes it allows
+  better code to be generated.
+
+  For example, on the 68000 in a fullword instruction it is possible to
+  use an immediate operand; but if the immediate value is between -128
+  and 127, better code results from loading the value into a register and
+  using the register.  This is because the load into the register can be
+  done with a :samp:`moveq` instruction.  We arrange for this to happen
+  by defining the letter :samp:`K` to mean 'any integer outside the
+  range -128 to 127', and then specifying :samp:`Ks` in the operand
+  constraints.
+
+  .. index:: g in constraint
+
+g
+  Any register, memory or immediate integer operand is allowed, except for
+  registers that are not general registers.
+
+  .. index:: X in constraint
+
+X
+
+  .. only:: gccint
+
+    Any operand whatsoever is allowed, even if it does not satisfy
+    ``general_operand``.  This is normally used in the constraint of
+    a ``match_scratch`` when certain alternatives will not actually
+    require a scratch register.
+
+  .. only:: not gccint
+
+    Any operand whatsoever is allowed.
+
+  .. index:: 0 in constraint, digits in constraint
+
+:samp:`{0}, {1}, {2}, ... {9}`
+  An operand that matches the specified operand number is allowed.  If a
+  digit is used together with letters within the same alternative, the
+  digit should come last.
+
+  This number is allowed to be more than a single digit.  If multiple
+  digits are encountered consecutively, they are interpreted as a single
+  decimal integer.  There is scant chance for ambiguity, since to-date
+  it has never been desirable that :samp:`10` be interpreted as matching
+  either operand 1 *or* operand 0.  Should this be desired, one
+  can use multiple alternatives instead.
+
+  .. index:: matching constraint, constraint, matching
+
+  This is called a :dfn:`matching constraint` and what it really means is
+  that the assembler has only a single operand that fills two roles
+
+  .. only:: gccint
+
+    considered separate in the RTL insn.  For example, an add insn has two
+    input operands and one output operand in the RTL, but on most CISC
+
+  .. only:: not gccint
+
+    which ``asm`` distinguishes.  For example, an add instruction uses
+    two input operands and an output operand, but on most CISC
+
+  machines an add instruction really has only two operands, one of them an
+  input-output operand:
+
+  .. code-block::
+
+    addl #35,r12
+
+  Matching constraints are used in these circumstances.
+  More precisely, the two operands that match must include one input-only
+  operand and one output-only operand.  Moreover, the digit must be a
+  smaller number than the number of the operand that uses it in the
+  constraint.
+
+  .. only:: gccint
+
+    For operands to match in a particular case usually means that they
+    are identical-looking RTL expressions.  But in a few special cases
+    specific kinds of dissimilarity are allowed.  For example, ``*x``
+    as an input operand will match ``*x++`` as an output operand.
+    For proper results in such cases, the output template should always
+    use the output-operand's number when printing the operand.
+
+  .. index:: load address instruction, push address instruction, address constraints, p in constraint
+
+p
+  An operand that is a valid memory address is allowed.  This is
+  for 'load address' and 'push address' instructions.
+
+  .. index:: address_operand
+
+  :samp:`p` in the constraint must be accompanied by ``address_operand``
+  as the predicate in the ``match_operand``.  This predicate interprets
+  the mode specified in the ``match_operand`` as the mode of the memory
+  reference for which the address would be valid.
+
+  .. index:: other register constraints, extensible constraints
+
+other-letters
+  Other letters can be defined in machine-dependent fashion to stand for
+  particular classes of registers or other arbitrary operand types.
+  :samp:`d`, :samp:`a` and :samp:`f` are defined on the 68000/68020 to stand
+  for data, address and floating point registers.
+
+.. only:: gccint
+
+  In order to have valid assembler code, each operand must satisfy
+  its constraint.  But a failure to do so does not prevent the pattern
+  from applying to an insn.  Instead, it directs the compiler to modify
+  the code so that the constraint will be satisfied.  Usually this is
+  done by copying an operand into a register.
+
+  Contrast, therefore, the two instruction patterns that follow:
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_dup 0)
+                     (match_operand:SI 1 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has two operands, one of which must appear in two places, and
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_operand:SI 1 "general_operand" "0")
+                     (match_operand:SI 2 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has three operands, two of which are required by a constraint to be
+  identical.  If we are considering an insn of the form
+
+  .. code-block:: c++
+
+    (insn n prev next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 6) (reg:SI 109)))
+      ...)
+
+  the first pattern would not apply at all, because this insn does not
+  contain two identical subexpressions in the right place.  The pattern would
+  say, 'That does not look like an add instruction; try other patterns'.
+  The second pattern would say, 'Yes, that's an add instruction, but there
+  is something wrong with it'.  It would direct the reload pass of the
+  compiler to generate additional insns to make the constraint true.  The
+  results might look like this:
+
+  .. code-block:: c++
+
+    (insn n2 prev n
+      (set (reg:SI 3) (reg:SI 6))
+      ...)
+
+    (insn n n2 next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 3) (reg:SI 109)))
+      ...)
+
+  It is up to you to make sure that each operand, in each pattern, has
+  constraints that can handle any RTL expression that could be present for
+  that operand.  (When multiple alternatives are in use, each pattern must,
+  for each possible combination of operand expressions, have at least one
+  alternative which can handle that combination of operands.)  The
+  constraints don't need to *allow* any possible operand---when this is
+  the case, they do not constrain---but they must at least point the way to
+  reloading any possible operand so that it will fit.
+
+  * If the constraint accepts whatever operands the predicate permits,
+    there is no problem: reloading is never necessary for this operand.
+
+    For example, an operand whose constraints permit everything except
+    registers is safe provided its predicate rejects registers.
+
+    An operand whose predicate accepts only constant values is safe
+    provided its constraints include the letter :samp:`i`.  If any possible
+    constant value is accepted, then nothing less than :samp:`i` will do;
+    if the predicate is more selective, then the constraints may also be
+    more selective.
+
+  * Any operand expression can be reloaded by copying it into a register.
+    So if an operand's constraints allow some kind of register, it is
+    certain to be safe.  It need not permit all classes of registers; the
+    compiler knows how to copy a register into another register of the
+    proper class in order to make an instruction valid.
+
+    .. index:: nonoffsettable memory reference, memory reference, nonoffsettable
+
+  * A nonoffsettable memory reference can be reloaded by copying the
+    address into a register.  So if the constraint uses the letter
+    :samp:`o`, all memory references are taken care of.
+
+  * A constant operand can be reloaded by allocating space in memory to
+    hold it as preinitialized data.  Then the memory reference can be used
+    in place of the constant.  So if the constraint uses the letters
+    :samp:`o` or :samp:`m`, constant operands are not a problem.
+
+  * If the constraint permits a constant and a pseudo register used in an insn
+    was not allocated to a hard register and is equivalent to a constant,
+    the register will be replaced with the constant.  If the predicate does
+    not permit a constant and the insn is re-recognized for some reason, the
+    compiler will crash.  Thus the predicate must always recognize any
+    objects allowed by the constraint.
+
+  If the operand's predicate can recognize registers, but the constraint does
+  not permit them, it can make the compiler crash.  When this operand happens
+  to be a register, the reload pass will be stymied, because it does not know
+  how to copy a register temporarily into memory.
+
+  If the predicate accepts a unary operator, the constraint applies to the
+  operand.  For example, the MIPS processor at ISA level 3 supports an
+  instruction which adds two registers in ``SImode`` to produce a
+  ``DImode`` result, but only if the registers are correctly sign
+  extended.  This predicate for the input operands accepts a
+  ``sign_extend`` of an ``SImode`` register.  Write the constraint
+  to indicate the type of register that is required for the operand of the
+  ``sign_extend``.
+
+.. only:: not gccint
+
+  So the first alternative for the 68000's logical-or could be written as
+  ``"+m" (output) : "ir" (input)``.  The second could be ``"+r"
+  (output): "irm" (input)``.  However, the fact that two memory locations
+  cannot be used in a single instruction prevents simply using ``"+rm"
+  (output) : "irm" (input)``.  Using multi-alternatives, this might be
+  written as ``"+m,r" (output) : "ir,irm" (input)``.  This describes
+  all the available alternatives to the compiler, allowing it to choose
+  the most efficient one for the current conditions.
+
+  There is no way within the template to determine which alternative was
+  chosen.  However you may be able to wrap your ``asm`` statements with
+  builtins such as ``__builtin_constant_p`` to achieve the desired results.
+
+.. index:: multiple alternative constraints
+
+.. _multi-alternative:
+
+Multiple Alternative Constraints
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Sometimes a single instruction has multiple alternative sets of possible
+operands.  For example, on the 68000, a logical-or instruction can combine
+register or an immediate value into memory, or it can combine any kind of
+operand into a register; but it cannot combine one memory location into
+another.
+
+These constraints are represented as multiple alternatives.  An alternative
+can be described by a series of letters for each operand.  The overall
+constraint for an operand is made from the letters for this operand
+from the first alternative, a comma, the letters for this operand from
+the second alternative, a comma, and so on until the last alternative.
+All operands for a single instruction must have the same number of
+alternatives.
+
+.. only:: gccint
+
+  Here is how it is done for fullword logical-or on the 68000:
+
+  .. code-block:: c++
+
+    (define_insn "iorsi3"
+      [(set (match_operand:SI 0 "general_operand" "=m,d")
+            (ior:SI (match_operand:SI 1 "general_operand" "%0,0")
+                    (match_operand:SI 2 "general_operand" "dKs,dmKs")))]
+      ...)
+
+  The first alternative has :samp:`m` (memory) for operand 0, :samp:`0` for
+  operand 1 (meaning it must match operand 0), and :samp:`dKs` for operand
+  2.  The second alternative has :samp:`d` (data register) for operand 0,
+  :samp:`0` for operand 1, and :samp:`dmKs` for operand 2.  The :samp:`=` and
+  :samp:`%` in the constraints apply to all the alternatives; their
+  meaning is explained in the next section (see :ref:`class-preferences`).
+
+  If all the operands fit any one alternative, the instruction is valid.
+  Otherwise, for each alternative, the compiler counts how many instructions
+  must be added to copy the operands so that that alternative applies.
+  The alternative requiring the least copying is chosen.  If two alternatives
+  need the same amount of copying, the one that comes first is chosen.
+  These choices can be altered with the :samp:`?` and :samp:`!` characters:
+
+  .. index:: ? in constraint, question mark
+
+  ``?``
+    Disparage slightly the alternative that the :samp:`?` appears in,
+    as a choice when no alternative applies exactly.  The compiler regards
+    this alternative as one unit more costly for each :samp:`?` that appears
+    in it.
+
+    .. index:: ! in constraint, exclamation point
+
+  ``!``
+    Disparage severely the alternative that the :samp:`!` appears in.
+    This alternative can still be used if it fits without reloading,
+    but if reloading is needed, some other alternative will be used.
+
+    .. index:: ^ in constraint, caret
+
+  ``^``
+    This constraint is analogous to :samp:`?` but it disparages slightly
+    the alternative only if the operand with the :samp:`^` needs a reload.
+
+    .. index:: $ in constraint, dollar sign
+
+  ``$``
+    This constraint is analogous to :samp:`!` but it disparages severely
+    the alternative only if the operand with the :samp:`$` needs a reload.
+
+  When an insn pattern has multiple alternatives in its constraints, often
+  the appearance of the assembler code is determined mostly by which
+  alternative was matched.  When this is so, the C code for writing the
+  assembler code can use the variable ``which_alternative``, which is
+  the ordinal number of the alternative that was actually satisfied (0 for
+  the first, 1 for the second alternative, etc.).  See :ref:`output-statement`.
+
+.. _class-preferences:
+
+Register Class Preferences
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. only:: gccint
+
+  .. index:: class preference constraints, register class preference constraints, voting between constraint alternatives
+
+  The operand constraints have another function: they enable the compiler
+  to decide which kind of hardware register a pseudo register is best
+  allocated to.  The compiler examines the constraints that apply to the
+  insns that use the pseudo register, looking for the machine-dependent
+  letters such as :samp:`d` and :samp:`a` that specify classes of registers.
+  The pseudo register is put in whichever class gets the most 'votes'.
+  The constraint letters :samp:`g` and :samp:`r` also vote: they vote in
+  favor of a general register.  The machine description says which registers
+  are considered general.
+
+  Of course, on some machines all registers are equivalent, and no register
+  classes are defined.  Then none of this complexity is relevant.
+
+.. index:: modifiers in constraints, constraint modifier characters
+
+.. _modifiers:
+
+Constraint Modifier Characters
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. prevent bad page break with this line
+
+Here are constraint modifier characters.
+
+.. index:: = in constraint
+
+:samp:`=`
+  Means that this operand is written to by this instruction:
+  the previous value is discarded and replaced by new data.
+
+  .. index:: + in constraint
+
+:samp:`+`
+  Means that this operand is both read and written by the instruction.
+
+  When the compiler fixes up the operands to satisfy the constraints,
+  it needs to know which operands are read by the instruction and
+  which are written by it.  :samp:`=` identifies an operand which is only
+  written; :samp:`+` identifies an operand that is both read and written; all
+  other operands are assumed to only be read.
+
+  If you specify :samp:`=` or :samp:`+` in a constraint, you put it in the
+  first character of the constraint string.
+
+  .. index:: & in constraint, earlyclobber operand
+
+:samp:`&`
+  Means (in a particular alternative) that this operand is an
+  :dfn:`earlyclobber` operand, which is written before the instruction is
+  finished using the input operands.  Therefore, this operand may not lie
+  in a register that is read by the instruction or as part of any memory
+  address.
+
+  :samp:`&` applies only to the alternative in which it is written.  In
+  constraints with multiple alternatives, sometimes one alternative
+  requires :samp:`&` while others do not.  See, for example, the
+  :samp:`movdf` insn of the 68000.
+
+  An operand which is read by the instruction can be tied to an earlyclobber
+  operand if its only use as an input occurs before the early result is
+  written.  Adding alternatives of this form often allows GCC to produce
+  better code when only some of the read operands can be affected by the
+  earlyclobber. See, for example, the :samp:`mulsi3` insn of the ARM.
+
+  Furthermore, if the :dfn:`earlyclobber` operand is also a read/write
+  operand, then that operand is written only after it's used.
+
+  :samp:`&` does not obviate the need to write :samp:`=` or :samp:`+`.  As
+  :dfn:`earlyclobber` operands are always written, a read-only
+  :dfn:`earlyclobber` operand is ill-formed and will be rejected by the
+  compiler.
+
+  .. index:: % in constraint
+
+:samp:`%`
+  Declares the instruction to be commutative for this operand and the
+  following operand.  This means that the compiler may interchange the
+  two operands if that is the cheapest way to make all operands fit the
+  constraints.  :samp:`%` applies to all alternatives and must appear as
+  the first character in the constraint.  Only read-only operands can use
+  :samp:`%`.
+
+  .. only:: gccint
+
+    This is often used in patterns for addition instructions
+    that really have only two operands: the result must go in one of the
+    arguments.  Here for example, is how the 68000 halfword-add
+    instruction is defined:
+
+    .. code-block:: c++
+
+      (define_insn "addhi3"
+        [(set (match_operand:HI 0 "general_operand" "=m,r")
+           (plus:HI (match_operand:HI 1 "general_operand" "%0,0")
+                    (match_operand:HI 2 "general_operand" "di,g")))]
+        ...)
+
+  GCC can only handle one commutative pair in an asm; if you use more,
+  the compiler may fail.  Note that you need not use the modifier if
+  the two alternatives are strictly identical; this would only waste
+  time in the reload pass.
+
+  .. only:: gccint
+
+    The modifier is not operational after
+    register allocation, so the result of ``define_peephole2``
+    and ``define_split`` s performed after reload cannot rely on
+    :samp:`%` to make the intended insn match.
+
+    .. index:: # in constraint
+
+  :samp:`#`
+    Says that all following characters, up to the next comma, are to be
+    ignored as a constraint.  They are significant only for choosing
+    register preferences.
+
+    .. index:: * in constraint
+
+  :samp:`*`
+    Says that the following character should be ignored when choosing
+    register preferences.  :samp:`*` has no effect on the meaning of the
+    constraint as a constraint, and no effect on reloading.  For LRA
+    :samp:`*` additionally disparages slightly the alternative if the
+    following character matches the operand.
+
+    Here is an example: the 68000 has an instruction to sign-extend a
+    halfword in a data register, and can also sign-extend a value by
+    copying it into an address register.  While either kind of register is
+    acceptable, the constraints on an address-register destination are
+    less strict, so it is best if register allocation makes an address
+    register its goal.  Therefore, :samp:`*` is used so that the :samp:`d`
+    constraint letter (for data register) is ignored when computing
+    register preferences.
+
+    .. code-block:: c++
+
+      (define_insn "extendhisi2"
+        [(set (match_operand:SI 0 "general_operand" "=*d,a")
+              (sign_extend:SI
+               (match_operand:HI 1 "general_operand" "0,g")))]
+        ...)
+
+.. index:: machine specific constraints, constraints, machine specific
+
+.. _machine-constraints:
+
+Constraints for Particular Machines
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Whenever possible, you should use the general-purpose constraint letters
+in ``asm`` arguments, since they will convey meaning more readily to
+people reading your code.  Failing that, use the constraint letters
+that usually have very similar meanings across architectures.  The most
+commonly used constraints are :samp:`m` and :samp:`r` (for memory and
+general-purpose registers respectively; see :ref:`simple-constraints`), and
+:samp:`I`, usually the letter indicating the most common
+immediate-constant format.
+
+Each architecture defines additional constraints.  These constraints
+are used by the compiler itself for instruction generation, as well as
+for ``asm`` statements; therefore, some of the constraints are not
+particularly useful for ``asm``.  Here is a summary of some of the
+machine-dependent constraints available on some particular machines;
+it includes both constraints that are useful for ``asm`` and
+constraints that aren't.  The compiler source file mentioned in the
+table heading for each architecture is the definitive reference for
+the meanings of that architecture's constraints.
+
+.. Please keep this table alphabetized by target!
+
+AArch64 family---:samp:`{config/aarch64/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``k``
+  The stack pointer register (``SP``)
+
+``w``
+  Floating point register, Advanced SIMD vector register or SVE vector register
+
+``x``
+  Like ``w``, but restricted to registers 0 to 15 inclusive.
+
+``y``
+  Like ``w``, but restricted to registers 0 to 7 inclusive.
+
+``Upl``
+  One of the low eight SVE predicate registers (``P0`` to ``P7``)
+
+``Upa``
+  Any of the SVE predicate registers (``P0`` to ``P15``)
+
+``I``
+  Integer constant that is valid as an immediate operand in an ``ADD``
+  instruction
+
+``J``
+  Integer constant that is valid as an immediate operand in a ``SUB``
+  instruction (once negated)
+
+``K``
+  Integer constant that can be used with a 32-bit logical instruction
+
+``L``
+  Integer constant that can be used with a 64-bit logical instruction
+
+``M``
+  Integer constant that is valid as an immediate operand in a 32-bit ``MOV``
+  pseudo instruction. The ``MOV`` may be assembled to one of several different
+  machine instructions depending on the value
+
+``N``
+  Integer constant that is valid as an immediate operand in a 64-bit ``MOV``
+  pseudo instruction
+
+``S``
+  An absolute symbolic address or a label reference
+
+``Y``
+  Floating point constant zero
+
+``Z``
+  Integer constant zero
+
+``Ush``
+  The high part (bits 12 and upwards) of the pc-relative address of a symbol
+  within 4GB of the instruction
+
+``Q``
+  A memory address which uses a single base register with no offset
+
+``Ump``
+  A memory address suitable for a load/store pair instruction in SI, DI, SF and
+  DF modes
+
+AMD GCN ---:samp:`{config/gcn/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Immediate integer in the range -16 to 64
+
+``J``
+  Immediate 16-bit signed integer
+
+``Kf``
+  Immediate constant -1
+
+``L``
+  Immediate 15-bit unsigned integer
+
+``A``
+  Immediate constant that can be inlined in an instruction encoding: integer
+  -16..64, or float 0.0, +/-0.5, +/-1.0, +/-2.0,
+  +/-4.0, 1.0/(2.0\*PI)
+
+``B``
+  Immediate 32-bit signed integer that can be attached to an instruction encoding
+
+``C``
+  Immediate 32-bit integer in range -16..4294967295 (i.e. 32-bit unsigned
+  integer or :samp:`A` constraint)
+
+``DA``
+  Immediate 64-bit constant that can be split into two :samp:`A` constants
+
+``DB``
+  Immediate 64-bit constant that can be split into two :samp:`B` constants
+
+``U``
+  Any ``unspec``
+
+``Y``
+  Any ``symbol_ref`` or ``label_ref``
+
+``v``
+  VGPR register
+
+``Sg``
+  SGPR register
+
+``SD``
+  SGPR registers valid for instruction destinations, including VCC, M0 and EXEC
+
+``SS``
+  SGPR registers valid for instruction sources, including VCC, M0, EXEC and SCC
+
+``Sm``
+  SGPR registers valid as a source for scalar memory instructions (excludes M0
+  and EXEC)
+
+``Sv``
+  SGPR registers valid as a source or destination for vector instructions
+  (excludes EXEC)
+
+``ca``
+  All condition registers: SCC, VCCZ, EXECZ
+
+``cs``
+  Scalar condition register: SCC
+
+``cV``
+  Vector condition register: VCC, VCC_LO, VCC_HI
+
+``e``
+  EXEC register (EXEC_LO and EXEC_HI)
+
+``RB``
+  Memory operand with address space suitable for ``buffer_*`` instructions
+
+``RF``
+  Memory operand with address space suitable for ``flat_*`` instructions
+
+``RS``
+  Memory operand with address space suitable for ``s_*`` instructions
+
+``RL``
+  Memory operand with address space suitable for ``ds_*`` LDS instructions
+
+``RG``
+  Memory operand with address space suitable for ``ds_*`` GDS instructions
+
+``RD``
+  Memory operand with address space suitable for any ``ds_*`` instructions
+
+``RM``
+  Memory operand with address space suitable for ``global_*`` instructions
+
+ARC ---:samp:`{config/arc/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``q``
+  Registers usable in ARCompact 16-bit instructions: ``r0`` - ``r3``,
+  ``r12`` - ``r15``.  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``e``
+  Registers usable as base-regs of memory addresses in ARCompact 16-bit memory
+  instructions: ``r0`` - ``r3``, ``r12`` - ``r15``, ``sp``.
+  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``D``
+  ARC FPX (dpfp) 64-bit registers. ``D0``, ``D1``.
+
+``I``
+  A signed 12-bit integer constant.
+
+``Cal``
+  constant for arithmetic/logical operations.  This might be any constant
+  that can be put into a long immediate by the assmbler or linker without
+  involving a PIC relocation.
+
+``K``
+  A 3-bit unsigned integer constant.
+
+``L``
+  A 6-bit unsigned integer constant.
+
+``CnL``
+  One's complement of a 6-bit unsigned integer constant.
+
+``CmL``
+  Two's complement of a 6-bit unsigned integer constant.
+
+``M``
+  A 5-bit unsigned integer constant.
+
+``O``
+  A 7-bit unsigned integer constant.
+
+``P``
+  A 8-bit unsigned integer constant.
+
+``H``
+  Any const_double value.
+
+ARM family---:samp:`{config/arm/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``h``
+  In Thumb state, the core registers ``r8`` - ``r15``.
+
+``k``
+  The stack pointer register.
+
+``l``
+  In Thumb State the core registers ``r0`` - ``r7``.  In ARM state this
+  is an alias for the ``r`` constraint.
+
+``t``
+  VFP floating-point registers ``s0`` - ``s31``.  Used for 32 bit values.
+
+``w``
+  VFP floating-point registers ``d0`` - ``d31`` and the appropriate
+  subset ``d0`` - ``d15`` based on command line options.
+  Used for 64 bit values only.  Not valid for Thumb1.
+
+``y``
+  The iWMMX co-processor registers.
+
+``z``
+  The iWMMX GR registers.
+
+``G``
+  The floating-point constant 0.0
+
+``I``
+  Integer that is valid as an immediate operand in a data processing
+  instruction.  That is, an integer in the range 0 to 255 rotated by a
+  multiple of 2
+
+``J``
+  Integer in the range -4095 to 4095
+
+``K``
+  Integer that satisfies constraint :samp:`I` when inverted (ones complement)
+
+``L``
+  Integer that satisfies constraint :samp:`I` when negated (twos complement)
+
+``M``
+  Integer in the range 0 to 32
+
+``Q``
+  A memory reference where the exact address is in a single register
+  (':samp:`m`' is preferable for ``asm`` statements)
+
+``R``
+  An item in the constant pool
+
+``S``
+  A symbol in the text segment of the current file
+
+``Uv``
+  A memory reference suitable for VFP load/store insns (reg+constant offset)
+
+``Uy``
+  A memory reference suitable for iWMMXt load/store instructions.
+
+``Uq``
+  A memory reference suitable for the ARMv4 ldrsb instruction.
+
+AVR family---:samp:`{config/avr/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``l``
+  Registers from r0 to r15
+
+``a``
+  Registers from r16 to r23
+
+``d``
+  Registers from r16 to r31
+
+``w``
+  Registers from r24 to r31.  These registers can be used in :samp:`adiw` command
+
+``e``
+  Pointer register (r26--r31)
+
+``b``
+  Base pointer register (r28--r31)
+
+``q``
+  Stack pointer register (SPH:SPL)
+
+``t``
+  Temporary register r0
+
+``x``
+  Register pair X (r27:r26)
+
+``y``
+  Register pair Y (r29:r28)
+
+``z``
+  Register pair Z (r31:r30)
+
+``I``
+  Constant greater than -1, less than 64
+
+``J``
+  Constant greater than -64, less than 1
+
+``K``
+  Constant integer 2
+
+``L``
+  Constant integer 0
+
+``M``
+  Constant that fits in 8 bits
+
+``N``
+  Constant integer -1
+
+``O``
+  Constant integer 8, 16, or 24
+
+``P``
+  Constant integer 1
+
+``G``
+  A floating point constant 0.0
+
+``Q``
+  A memory address based on Y or Z pointer with displacement.
+
+Blackfin family---:samp:`{config/bfin/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  P register
+
+``d``
+  D register
+
+``z``
+  A call clobbered P register.
+
+:samp:`q{n}`
+  A single register.  If :samp:`{n}` is in the range 0 to 7, the corresponding D
+  register.  If it is ``A``, then the register P0.
+
+``D``
+  Even-numbered D register
+
+``W``
+  Odd-numbered D register
+
+``e``
+  Accumulator register.
+
+``A``
+  Even-numbered accumulator register.
+
+``B``
+  Odd-numbered accumulator register.
+
+``b``
+  I register
+
+``v``
+  B register
+
+``f``
+  M register
+
+``c``
+  Registers used for circular buffering, i.e. I, B, or L registers.
+
+``C``
+  The CC register.
+
+``t``
+  LT0 or LT1.
+
+``k``
+  LC0 or LC1.
+
+``u``
+  LB0 or LB1.
+
+``x``
+  Any D, P, B, M, I or L register.
+
+``y``
+  Additional registers typically used only in prologues and epilogues: RETS,
+  RETN, RETI, RETX, RETE, ASTAT, SEQSTAT and USP.
+
+``w``
+  Any register except accumulators or CC.
+
+``Ksh``
+  Signed 16 bit integer (in the range -32768 to 32767)
+
+``Kuh``
+  Unsigned 16 bit integer (in the range 0 to 65535)
+
+``Ks7``
+  Signed 7 bit integer (in the range -64 to 63)
+
+``Ku7``
+  Unsigned 7 bit integer (in the range 0 to 127)
+
+``Ku5``
+  Unsigned 5 bit integer (in the range 0 to 31)
+
+``Ks4``
+  Signed 4 bit integer (in the range -8 to 7)
+
+``Ks3``
+  Signed 3 bit integer (in the range -3 to 4)
+
+``Ku3``
+  Unsigned 3 bit integer (in the range 0 to 7)
+
+:samp:`P{n}`
+  Constant :samp:`{n}`, where :samp:`{n}` is a single-digit constant in the range 0 to 4.
+
+``PA``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use with either accumulator.
+
+``PB``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use only with accumulator A1.
+
+``M1``
+  Constant 255.
+
+``M2``
+  Constant 65535.
+
+``J``
+  An integer constant with exactly a single bit set.
+
+``L``
+  An integer constant with all bits set except exactly one.
+
+``H``, ``Q``
+
+  Any SYMBOL_REF.
+
+C-SKY---:samp:`{config/csky/constraints.md}`
+
+``a``
+  The mini registers r0 - r7.
+
+``b``
+  The low registers r0 - r15.
+
+``c``
+  C register.
+
+``y``
+  HI and LO registers.
+
+``l``
+  LO register.
+
+``h``
+  HI register.
+
+``v``
+  Vector registers.
+
+``z``
+  Stack pointer register (SP).
+
+``Q``
+  A memory address which uses a base register with a short offset
+  or with a index register with its scale.
+
+``W``
+  A memory address which uses a base register with a index register
+  with its scale.
+
+.. only:: gccint
+
+  The C-SKY back end supports a large set of additional constraints
+  that are only useful for instruction selection or splitting rather
+  than inline asm, such as constraints representing constant integer
+  ranges accepted by particular instruction encodings.
+  Refer to the source code for details.
+
+Epiphany---:samp:`{config/epiphany/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``U16``
+  An unsigned 16-bit constant.
+
+``K``
+  An unsigned 5-bit constant.
+
+``L``
+  A signed 11-bit constant.
+
+``Cm1``
+  A signed 11-bit constant added to -1.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cl1``
+  Left-shift of -1, i.e., a bit mask with a block of leading ones, the rest
+  being a block of trailing zeroes.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cr1``
+  Right-shift of -1, i.e., a bit mask with a trailing block of ones, the
+  rest being zeroes.  Or to put it another way, one less than a power of two.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cal``
+  Constant for arithmetic/logical operations.
+  This is like ``i``, except that for position independent code,
+  no symbols / expressions needing relocations are allowed.
+
+``Csy``
+  Symbolic constant for call/jump instruction.
+
+``Rcs``
+  The register class usable in short insns.  This is a register class
+  constraint, and can thus drive register allocation.
+  This constraint won't match unless :option:`-mprefer-short-insn-regs` is
+  in effect.
+
+``Rsc``
+  The register class of registers that can be used to hold a
+  sibcall call address.  I.e., a caller-saved register.
+
+``Rct``
+  Core control register class.
+
+``Rgs``
+  The register group usable in short insns.
+  This constraint does not use a register class, so that it only
+  passively matches suitable registers, and doesn't drive register allocation.
+
+.. only:: gccint
+
+  ``Car``
+    Constant suitable for the addsi3_r pattern.  This is a valid offset
+    For byte, halfword, or word addressing.
+
+``Rra``
+  Matches the return address if it can be replaced with the link register.
+
+``Rcc``
+  Matches the integer condition code register.
+
+``Sra``
+  Matches the return address if it is in a stack slot.
+
+``Cfm``
+  Matches control register values to switch fp mode, which are encapsulated in
+  ``UNSPEC_FP_MODE``.
+
+FRV---:samp:`{config/frv/frv.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register in the class ``ACC_REGS`` (``acc0`` to ``acc7``).
+
+``b``
+  Register in the class ``EVEN_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``c``
+  Register in the class ``CC_REGS`` (``fcc0`` to ``fcc3`` and
+  ``icc0`` to ``icc3``).
+
+``d``
+  Register in the class ``GPR_REGS`` (``gr0`` to ``gr63``).
+
+``e``
+  Register in the class ``EVEN_REGS`` (``gr0`` to ``gr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``f``
+  Register in the class ``FPR_REGS`` (``fr0`` to ``fr63``).
+
+``h``
+  Register in the class ``FEVEN_REGS`` (``fr0`` to ``fr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``l``
+  Register in the class ``LR_REG`` (the ``lr`` register).
+
+``q``
+  Register in the class ``QUAD_REGS`` (``gr2`` to ``gr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``t``
+  Register in the class ``ICC_REGS`` (``icc0`` to ``icc3``).
+
+``u``
+  Register in the class ``FCC_REGS`` (``fcc0`` to ``fcc3``).
+
+``v``
+  Register in the class ``ICR_REGS`` (``cc4`` to ``cc7``).
+
+``w``
+  Register in the class ``FCR_REGS`` (``cc0`` to ``cc3``).
+
+``x``
+  Register in the class ``QUAD_FPR_REGS`` (``fr0`` to ``fr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``z``
+  Register in the class ``SPR_REGS`` (``lcr`` and ``lr``).
+
+``A``
+  Register in the class ``QUAD_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``B``
+  Register in the class ``ACCG_REGS`` (``accg0`` to ``accg7``).
+
+``C``
+  Register in the class ``CR_REGS`` (``cc0`` to ``cc7``).
+
+``G``
+  Floating point constant zero
+
+``I``
+  6-bit signed integer constant
+
+``J``
+  10-bit signed integer constant
+
+``L``
+  16-bit signed integer constant
+
+``M``
+  16-bit unsigned integer constant
+
+``N``
+  12-bit signed integer constant that is negative---i.e. in the
+  range of -2048 to -1
+
+``O``
+  Constant zero
+
+``P``
+  12-bit signed integer constant that is greater than zero---i.e. in the
+  range of 1 to 2047.
+
+FT32---:samp:`{config/ft32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``e``
+  An offset address.
+
+``f``
+  An offset address.
+
+``O``
+  The constant zero or one
+
+``I``
+  A 16-bit signed constant (-32768 ... 32767)
+
+``w``
+  A bitfield mask suitable for bext or bins
+
+``x``
+  An inverted bitfield mask suitable for bext or bins
+
+``L``
+  A 16-bit unsigned constant, multiple of 4 (0 ... 65532)
+
+``S``
+  A 20-bit signed constant (-524288 ... 524287)
+
+``b``
+  A constant for a bitfield width (1 ... 16)
+
+``KA``
+  A 10-bit signed constant (-512 ... 511)
+
+Hewlett-Packard PA-RISC---:samp:`{config/pa/pa.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register 1
+
+``f``
+  Floating point register
+
+``q``
+  Shift amount register
+
+``x``
+  Floating point register (deprecated)
+
+``y``
+  Upper floating point register (32-bit), floating point register (64-bit)
+
+``Z``
+  Any register
+
+``I``
+  Signed 11-bit integer constant
+
+``J``
+  Signed 14-bit integer constant
+
+``K``
+  Integer constant that can be deposited with a ``zdepi`` instruction
+
+``L``
+  Signed 5-bit integer constant
+
+``M``
+  Integer constant 0
+
+``N``
+  Integer constant that can be loaded with a ``ldil`` instruction
+
+``O``
+  Integer constant whose value plus one is a power of 2
+
+``P``
+  Integer constant that can be used for ``and`` operations in ``depi``
+  and ``extru`` instructions
+
+``S``
+  Integer constant 31
+
+``U``
+  Integer constant 63
+
+``G``
+  Floating-point constant 0.0
+
+``A``
+  A ``lo_sum`` data-linkage-table memory operand
+
+``Q``
+  A memory operand that can be used as the destination operand of an
+  integer store instruction
+
+``R``
+  A scaled or unscaled indexed memory operand
+
+``T``
+  A memory operand for floating-point loads and stores
+
+``W``
+  A register indirect memory operand
+
+Intel IA-64---:samp:`{config/ia64/ia64.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register ``r0`` to ``r3`` for ``addl`` instruction
+
+``b``
+  Branch register
+
+``c``
+  Predicate register (:samp:`c` as in 'conditional')
+
+``d``
+  Application register residing in M-unit
+
+``e``
+  Application register residing in I-unit
+
+``f``
+  Floating-point register
+
+``m``
+  Memory operand.  If used together with :samp:`<` or :samp:`>`,
+  the operand can have postincrement and postdecrement which
+  require printing with :samp:`%Pn` on IA-64.
+
+``G``
+  Floating-point constant 0.0 or 1.0
+
+``I``
+  14-bit signed integer constant
+
+``J``
+  22-bit signed integer constant
+
+``K``
+  8-bit signed integer constant for logical instructions
+
+``L``
+  8-bit adjusted signed integer constant for compare pseudo-ops
+
+``M``
+  6-bit unsigned integer constant for shift counts
+
+``N``
+  9-bit signed integer constant for load and store postincrements
+
+``O``
+  The constant zero
+
+``P``
+  0 or -1 for ``dep`` instruction
+
+``Q``
+  Non-volatile memory for floating-point loads and stores
+
+``R``
+  Integer constant in the range 1 to 4 for ``shladd`` instruction
+
+``S``
+  Memory operand except postincrement and postdecrement.  This is
+  now roughly the same as :samp:`m` when not used together with :samp:`<`
+  or :samp:`>`.
+
+M32C---:samp:`{config/m32c/m32c.cc}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Rsp`` ``Rfb`` ``Rsb``
+  :samp:`$sp`, :samp:`$fb`, :samp:`$sb`.
+
+``Rcr``
+  Any control register, when they're 16 bits wide (nothing if control
+  registers are 24 bits wide)
+
+``Rcl``
+  Any control register, when they're 24 bits wide.
+
+``R0w`` ``R1w`` ``R2w`` ``R3w``
+  $r0, $r1, $r2, $r3.
+
+``R02``
+  $r0 or $r2, or $r2r0 for 32 bit values.
+
+``R13``
+  $r1 or $r3, or $r3r1 for 32 bit values.
+
+``Rdi``
+  A register that can hold a 64 bit value.
+
+``Rhl``
+  $r0 or $r1 (registers with addressable high/low bytes)
+
+``R23``
+  $r2 or $r3
+
+``Raa``
+  Address registers
+
+``Raw``
+  Address registers when they're 16 bits wide.
+
+``Ral``
+  Address registers when they're 24 bits wide.
+
+``Rqi``
+  Registers that can hold QI values.
+
+``Rad``
+  Registers that can be used with displacements ($a0, $a1, $sb).
+
+``Rsi``
+  Registers that can hold 32 bit values.
+
+``Rhi``
+  Registers that can hold 16 bit values.
+
+``Rhc``
+  Registers chat can hold 16 bit values, including all control
+  registers.
+
+``Rra``
+  $r0 through R1, plus $a0 and $a1.
+
+``Rfl``
+  The flags register.
+
+``Rmm``
+  The memory-based pseudo-registers $mem0 through $mem15.
+
+``Rpi``
+  Registers that can hold pointers (16 bit registers for r8c, m16c; 24
+  bit registers for m32cm, m32c).
+
+``Rpa``
+  Matches multiple registers in a PARALLEL to form a larger register.
+  Used to match function return values.
+
+``Is3``
+  -8 ... 7
+
+``IS1``
+  -128 ... 127
+
+``IS2``
+  -32768 ... 32767
+
+``IU2``
+  0 ... 65535
+
+``In4``
+  -8 ... -1 or 1 ... 8
+
+``In5``
+  -16 ... -1 or 1 ... 16
+
+``In6``
+  -32 ... -1 or 1 ... 32
+
+``IM2``
+  -65536 ... -1
+
+``Ilb``
+  An 8 bit value with exactly one bit set.
+
+``Ilw``
+  A 16 bit value with exactly one bit set.
+
+``Sd``
+  The common src/dest memory addressing modes.
+
+``Sa``
+  Memory addressed using $a0 or $a1.
+
+``Si``
+  Memory addressed with immediate addresses.
+
+``Ss``
+  Memory addressed using the stack pointer ($sp).
+
+``Sf``
+  Memory addressed using the frame base register ($fb).
+
+``Ss``
+  Memory addressed using the small base register ($sb).
+
+``S1``
+  $r1h
+
+LoongArch---:samp:`{config/loongarch/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``k``
+  A memory operand whose address is formed by a base register and
+  (optionally scaled) index register.
+
+``l``
+  A signed 16-bit constant.
+
+``m``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``st.w`` and ``ld.w``.
+
+``I``
+  A signed 12-bit constant (for arithmetic instructions).
+
+``K``
+  An unsigned 12-bit constant (for logic instructions).
+
+``ZB``
+  An address that is held in a general-purpose register.
+  The offset is zero.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll.w`` and ``sc.w``.
+
+MicroBlaze---:samp:`{config/microblaze/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general register (``r0`` to ``r31``).
+
+``z``
+  A status register (``rmsr``, ``$fcc1`` to ``$fcc7``).
+
+MIPS---:samp:`{config/mips/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general-purpose register.  This is equivalent to ``r`` unless
+  generating MIPS16 code, in which case the MIPS16 register set is used.
+
+``f``
+  A floating-point register (if available).
+
+``h``
+  Formerly the ``hi`` register.  This constraint is no longer supported.
+
+``l``
+  The ``lo`` register.  Use this register to store values that are
+  no bigger than a word.
+
+``x``
+  The concatenated ``hi`` and ``lo`` registers.  Use this register
+  to store doubleword values.
+
+``c``
+  A register suitable for use in an indirect jump.  This will always be
+  ``$25`` for :option:`-mabicalls`.
+
+``v``
+  Register ``$3``.  Do not use this constraint in new code;
+  it is retained only for compatibility with glibc.
+
+``y``
+  Equivalent to ``r`` ; retained for backwards compatibility.
+
+``z``
+  A floating-point condition code register.
+
+``I``
+  A signed 16-bit constant (for arithmetic instructions).
+
+``J``
+  Integer zero.
+
+``K``
+  An unsigned 16-bit constant (for logic instructions).
+
+``L``
+  A signed 32-bit constant in which the lower 16 bits are zero.
+  Such constants can be loaded using ``lui``.
+
+``M``
+  A constant that cannot be loaded using ``lui``, ``addiu``
+  or ``ori``.
+
+``N``
+  A constant in the range -65535 to -1 (inclusive).
+
+``O``
+  A signed 15-bit constant.
+
+``P``
+  A constant in the range 1 to 65535 (inclusive).
+
+``G``
+  Floating-point zero.
+
+``R``
+  An address that can be used in a non-macro load or store.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll`` and ``sc``.
+
+``ZD``
+  An address suitable for a ``prefetch`` instruction, or for any other
+  instruction with the same addressing mode as ``prefetch``.
+
+Motorola 680x0---:samp:`{config/m68k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register
+
+``d``
+  Data register
+
+``f``
+  68881 floating-point register, if available
+
+``I``
+  Integer in the range 1 to 8
+
+``J``
+  16-bit signed number
+
+``K``
+  Signed number whose magnitude is greater than 0x80
+
+``L``
+  Integer in the range -8 to -1
+
+``M``
+  Signed number whose magnitude is greater than 0x100
+
+``N``
+  Range 24 to 31, rotatert:SI 8 to 1 expressed as rotate
+
+``O``
+  16 (for rotate using swap)
+
+``P``
+  Range 8 to 15, rotatert:HI 8 to 1 expressed as rotate
+
+``R``
+  Numbers that mov3q can handle
+
+``G``
+  Floating point constant that is not a 68881 constant
+
+``S``
+  Operands that satisfy 'm' when -mpcrel is in effect
+
+``T``
+  Operands that satisfy 's' when -mpcrel is not in effect
+
+``Q``
+  Address register indirect addressing mode
+
+``U``
+  Register offset addressing
+
+``W``
+  const_call_operand
+
+``Cs``
+  symbol_ref or const
+
+``Ci``
+  const_int
+
+``C0``
+  const_int 0
+
+``Cj``
+  Range of signed numbers that don't fit in 16 bits
+
+``Cmvq``
+  Integers valid for mvq
+
+``Capsw``
+  Integers valid for a moveq followed by a swap
+
+``Cmvz``
+  Integers valid for mvz
+
+``Cmvs``
+  Integers valid for mvs
+
+``Ap``
+  push_operand
+
+``Ac``
+  Non-register operands allowed in clr
+
+Moxie---:samp:`{config/moxie/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``I``
+  A constant in the range of 0 to 255.
+
+``N``
+  A constant in the range of 0 to -255.
+
+MSP430---:samp:`{config/msp430/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R12``
+  Register R12.
+
+``R13``
+  Register R13.
+
+``K``
+  Integer constant 1.
+
+``L``
+  Integer constant -1^20..1^19.
+
+``M``
+  Integer constant 1-4.
+
+``Ya``
+  Memory references which do not require an extended MOVX instruction.
+
+``Yl``
+  Memory reference, labels only.
+
+``Ys``
+  Memory reference, stack only.
+
+NDS32---:samp:`{config/nds32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``w``
+  LOW register class $r0 to $r7 constraint for V3/V3M ISA.
+
+``l``
+  LOW register class $r0 to $r7.
+
+``d``
+  MIDDLE register class $r0 to $r11, $r16 to $r19.
+
+``h``
+  HIGH register class $r12 to $r14, $r20 to $r31.
+
+``t``
+  Temporary assist register $ta (i.e. $r15).
+
+``k``
+  Stack register $sp.
+
+``Iu03``
+  Unsigned immediate 3-bit value.
+
+``In03``
+  Negative immediate 3-bit value in the range of -7--0.
+
+``Iu04``
+  Unsigned immediate 4-bit value.
+
+``Is05``
+  Signed immediate 5-bit value.
+
+``Iu05``
+  Unsigned immediate 5-bit value.
+
+``In05``
+  Negative immediate 5-bit value in the range of -31--0.
+
+``Ip05``
+  Unsigned immediate 5-bit value for movpi45 instruction with range 16--47.
+
+``Iu06``
+  Unsigned immediate 6-bit value constraint for addri36.sp instruction.
+
+``Iu08``
+  Unsigned immediate 8-bit value.
+
+``Iu09``
+  Unsigned immediate 9-bit value.
+
+``Is10``
+  Signed immediate 10-bit value.
+
+``Is11``
+  Signed immediate 11-bit value.
+
+``Is15``
+  Signed immediate 15-bit value.
+
+``Iu15``
+  Unsigned immediate 15-bit value.
+
+``Ic15``
+  A constant which is not in the range of imm15u but ok for bclr instruction.
+
+``Ie15``
+  A constant which is not in the range of imm15u but ok for bset instruction.
+
+``It15``
+  A constant which is not in the range of imm15u but ok for btgl instruction.
+
+``Ii15``
+  A constant whose compliment value is in the range of imm15u
+  and ok for bitci instruction.
+
+``Is16``
+  Signed immediate 16-bit value.
+
+``Is17``
+  Signed immediate 17-bit value.
+
+``Is19``
+  Signed immediate 19-bit value.
+
+``Is20``
+  Signed immediate 20-bit value.
+
+``Ihig``
+  The immediate value that can be simply set high 20-bit.
+
+``Izeb``
+  The immediate value 0xff.
+
+``Izeh``
+  The immediate value 0xffff.
+
+``Ixls``
+  The immediate value 0x01.
+
+``Ix11``
+  The immediate value 0x7ff.
+
+``Ibms``
+  The immediate value with power of 2.
+
+``Ifex``
+  The immediate value with power of 2 minus 1.
+
+``U33``
+  Memory constraint for 333 format.
+
+``U45``
+  Memory constraint for 45 format.
+
+``U37``
+  Memory constraint for 37 format.
+
+Nios II family---:samp:`{config/nios2/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``J``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking only the upper 16-bits of a
+  32-bit number. Range 32-bit numbers with the lower
+  16-bits being 0.
+
+``L``
+  Integer that is valid as an immediate operand for a
+  shift instruction. Range 0 to 31.
+
+``M``
+  Integer that is valid as an immediate operand for
+  only the value 0. Can be used in conjunction with
+  the format modifier ``z`` to use ``r0``
+  instead of ``0`` in the assembly output.
+
+``N``
+  Integer that is valid as an immediate operand for
+  a custom instruction opcode. Range 0 to 255.
+
+``P``
+  An immediate operand for R2 andchi/andci instructions.
+
+``S``
+  Matches immediates which are addresses in the small
+  data section and therefore can be added to ``gp``
+  as a 16-bit immediate to re-create their 32-bit value.
+
+``U``
+  Matches constants suitable as an operand for the rdprs and
+  cache instructions.
+
+``v``
+  A memory operand suitable for Nios II R2 load/store
+  exclusive instructions.
+
+``w``
+  A memory operand suitable for load/store IO and cache
+  instructions.
+
+.. only:: gccint
+
+  ``T``
+    A ``const`` wrapped ``UNSPEC`` expression,
+    representing a supported PIC or TLS relocation.
+
+OpenRISC---:samp:`{config/or1k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``M``
+  Signed 16-bit constant shifted left 16 bits. (Used with ``l.movhi``)
+
+``O``
+  Zero
+
+.. only:: gccint
+
+  ``c``
+    Register usable for sibcalls.
+
+PDP-11---:samp:`{config/pdp11/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Floating point registers AC0 through AC3.  These can be loaded from/to
+  memory with a single instruction.
+
+``d``
+  Odd numbered general registers (R1, R3, R5).  These are used for
+  16-bit multiply operations.
+
+``D``
+  A memory reference that is encoded within the opcode, but not
+  auto-increment or auto-decrement.
+
+``f``
+  Any of the floating point registers (AC0 through AC5).
+
+``G``
+  Floating point constant 0.
+
+``h``
+  Floating point registers AC4 and AC5.  These cannot be loaded from/to
+  memory with a single instruction.
+
+``I``
+  An integer constant that fits in 16 bits.
+
+``J``
+  An integer constant whose low order 16 bits are zero.
+
+``K``
+  An integer constant that does not meet the constraints for codes
+  :samp:`I` or :samp:`J`.
+
+``L``
+  The integer constant 1.
+
+``M``
+  The integer constant -1.
+
+``N``
+  The integer constant 0.
+
+``O``
+  Integer constants 0 through 3; shifts by these
+  amounts are handled as multiple single-bit shifts rather than a single
+  variable-length shift.
+
+``Q``
+  A memory reference which requires an additional word (address or
+  offset) after the opcode.
+
+``R``
+  A memory reference that is encoded within the opcode.
+
+PowerPC and IBM RS6000---:samp:`{config/rs6000/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``r``
+  A general purpose register (GPR), ``r0``... ``r31``.
+
+``b``
+  A base register.  Like ``r``, but ``r0`` is not allowed, so
+  ``r1``... ``r31``.
+
+``f``
+  A floating point register (FPR), ``f0``... ``f31``.
+
+``d``
+  A floating point register.  This is the same as ``f`` nowadays;
+  historically ``f`` was for single-precision and ``d`` was for
+  double-precision floating point.
+
+``v``
+  An Altivec vector register (VR), ``v0``... ``v31``.
+
+``wa``
+  A VSX register (VSR), ``vs0``... ``vs63``.  This is either an
+  FPR (``vs0``... ``vs31`` are ``f0``... ``f31``) or a VR
+  (``vs32``... ``vs63`` are ``v0``... ``v31``).
+
+  When using ``wa``, you should use the ``%x`` output modifier, so that
+  the correct register number is printed.  For example:
+
+  .. code-block:: c++
+
+    asm ("xvadddp %x0,%x1,%x2"
+         : "=wa" (v1)
+         : "wa" (v2), "wa" (v3));
+
+  You should not use ``%x`` for ``v`` operands:
+
+  .. code-block:: c++
+
+    asm ("xsaddqp %0,%1,%2"
+         : "=v" (v1)
+         : "v" (v2), "v" (v3));
+
+.. only:: gccint
+
+  ``h``
+    A special register (``vrsave``, ``ctr``, or ``lr``).
+
+``c``
+  The count register, ``ctr``.
+
+``l``
+  The link register, ``lr``.
+
+``x``
+  Condition register field 0, ``cr0``.
+
+``y``
+  Any condition register field, ``cr0``... ``cr7``.
+
+.. only:: gccint
+
+  ``z``
+    The carry bit, ``XER[CA]``.
+
+  ``we``
+    Like ``wa``, if :option:`-mpower9-vector` and :option:`-m64` are used;
+    otherwise, ``NO_REGS``.
+
+  ``wn``
+    No register (``NO_REGS``).
+
+  ``wr``
+    Like ``r``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wx``
+    Like ``d``, if :option:`-mpowerpc-gfxopt` is used; otherwise, ``NO_REGS``.
+
+  ``wA``
+    Like ``b``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wB``
+    Signed 5-bit constant integer that can be loaded into an Altivec register.
+
+  ``wE``
+    Vector constant that can be loaded with the XXSPLTIB instruction.
+
+  ``wF``
+    Memory operand suitable for power8 GPR load fusion.
+
+  ``wL``
+    Int constant that is the element number mfvsrld accesses in a vector.
+
+  ``wM``
+    Match vector constant with all 1's if the XXLORC instruction is available.
+
+  ``wO``
+    Memory operand suitable for the ISA 3.0 vector d-form instructions.
+
+  ``wQ``
+    Memory operand suitable for the load/store quad instructions.
+
+  ``wS``
+    Vector constant that can be loaded with XXSPLTIB & sign extension.
+
+  ``wY``
+    A memory operand for a DS-form instruction.
+
+  ``wZ``
+    An indexed or indirect memory operand, ignoring the bottom 4 bits.
+
+``I``
+  A signed 16-bit constant.
+
+``J``
+  An unsigned 16-bit constant shifted left 16 bits (use ``L`` instead
+  for ``SImode`` constants).
+
+``K``
+  An unsigned 16-bit constant.
+
+``L``
+  A signed 16-bit constant shifted left 16 bits.
+
+.. only:: gccint
+
+  ``M``
+    An integer constant greater than 31.
+
+  ``N``
+    An exact power of 2.
+
+  ``O``
+    The integer constant zero.
+
+  ``P``
+    A constant whose negation is a signed 16-bit constant.
+
+``eI``
+  A signed 34-bit integer constant if prefixed instructions are supported.
+
+``eQ``
+  An IEEE 128-bit constant that can be loaded into a VSX register with
+  the ``lxvkq`` instruction.
+
+.. only:: gccint
+
+  ``G``
+    A floating point constant that can be loaded into a register with one
+    instruction per word.
+
+  ``H``
+    A floating point constant that can be loaded into a register using
+    three instructions.
+
+``m``
+  A memory operand.
+  Normally, ``m`` does not allow addresses that update the base register.
+  If the ``<`` or ``>`` constraint is also used, they are allowed and
+  therefore on PowerPC targets in that case it is only safe
+  to use ``m<>`` in an ``asm`` statement if that ``asm`` statement
+  accesses the operand exactly once.  The ``asm`` statement must also
+  use ``%U<opno>`` as a placeholder for the 'update' flag in the
+  corresponding load or store instruction.  For example:
+
+  .. code-block:: c++
+
+    asm ("st%U0 %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is correct but:
+
+  .. code-block:: c++
+
+    asm ("st %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is not.
+
+.. only:: gccint
+
+  ``es``
+    A 'stable' memory operand; that is, one which does not include any
+    automodification of the base register.  This used to be useful when
+    ``m`` allowed automodification of the base register, but as those
+    are now only allowed when ``<`` or ``>`` is used, ``es`` is
+    basically the same as ``m`` without ``<`` and ``>``.
+
+``Q``
+  A memory operand addressed by just a base register.
+
+.. only:: gccint
+
+  ``Y``
+    A memory operand for a DQ-form instruction.
+
+``Z``
+  A memory operand accessed with indexed or indirect addressing.
+
+.. only:: gccint
+
+  ``R``
+    An AIX TOC entry.
+
+``a``
+  An indexed or indirect address.
+
+.. only:: gccint
+
+  ``U``
+    A V.4 small data reference.
+
+  ``W``
+    A vector constant that does not require memory.
+
+  ``j``
+    The zero vector constant.
+
+PRU---:samp:`{config/pru/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  An unsigned 8-bit integer constant.
+
+``J``
+  An unsigned 16-bit integer constant.
+
+``L``
+  An unsigned 5-bit integer constant (for shift counts).
+
+``T``
+  A text segment (program memory) constant label.
+
+``Z``
+  Integer constant zero.
+
+RL78---:samp:`{config/rl78/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Int3``
+  An integer constant in the range 1 ... 7.
+
+``Int8``
+  An integer constant in the range 0 ... 255.
+
+``J``
+  An integer constant in the range -255 ... 0
+
+``K``
+  The integer constant 1.
+
+``L``
+  The integer constant -1.
+
+``M``
+  The integer constant 0.
+
+``N``
+  The integer constant 2.
+
+``O``
+  The integer constant -2.
+
+``P``
+  An integer constant in the range 1 ... 15.
+
+``Qbi``
+  The built-in compare types--eq, ne, gtu, ltu, geu, and leu.
+
+``Qsc``
+  The synthetic compare types--gt, lt, ge, and le.
+
+``Wab``
+  A memory reference with an absolute address.
+
+``Wbc``
+  A memory reference using ``BC`` as a base register, with an optional offset.
+
+``Wca``
+  A memory reference using ``AX``, ``BC``, ``DE``, or ``HL`` for the address, for calls.
+
+``Wcv``
+  A memory reference using any 16-bit register pair for the address, for calls.
+
+``Wd2``
+  A memory reference using ``DE`` as a base register, with an optional offset.
+
+``Wde``
+  A memory reference using ``DE`` as a base register, without any offset.
+
+``Wfr``
+  Any memory reference to an address in the far address space.
+
+``Wh1``
+  A memory reference using ``HL`` as a base register, with an optional one-byte offset.
+
+``Whb``
+  A memory reference using ``HL`` as a base register, with ``B`` or ``C`` as the index register.
+
+``Whl``
+  A memory reference using ``HL`` as a base register, without any offset.
+
+``Ws1``
+  A memory reference using ``SP`` as a base register, with an optional one-byte offset.
+
+``Y``
+  Any memory reference to an address in the near address space.
+
+``A``
+  The ``AX`` register.
+
+``B``
+  The ``BC`` register.
+
+``D``
+  The ``DE`` register.
+
+``R``
+  ``A`` through ``L`` registers.
+
+``S``
+  The ``SP`` register.
+
+``T``
+  The ``HL`` register.
+
+``Z08W``
+  The 16-bit ``R8`` register.
+
+``Z10W``
+  The 16-bit ``R10`` register.
+
+``Zint``
+  The registers reserved for interrupts (``R24`` to ``R31``).
+
+``a``
+  The ``A`` register.
+
+``b``
+  The ``B`` register.
+
+``c``
+  The ``C`` register.
+
+``d``
+  The ``D`` register.
+
+``e``
+  The ``E`` register.
+
+``h``
+  The ``H`` register.
+
+``l``
+  The ``L`` register.
+
+``v``
+  The virtual registers.
+
+``w``
+  The ``PSW`` register.
+
+``x``
+  The ``X`` register.
+
+RISC-V---:samp:`{config/riscv/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``I``
+  An I-type 12-bit signed immediate.
+
+``J``
+  Integer zero.
+
+``K``
+  A 5-bit unsigned immediate for CSR access instructions.
+
+``A``
+  An address that is held in a general-purpose register.
+
+``S``
+  A constraint that matches an absolute symbolic address.
+
+RX---:samp:`{config/rx/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Q``
+  An address which does not involve register indirect addressing or
+  pre/post increment/decrement addressing.
+
+``Symbol``
+  A symbol reference.
+
+``Int08``
+  A constant in the range -256 to 255, inclusive.
+
+``Sint08``
+  A constant in the range -128 to 127, inclusive.
+
+``Sint16``
+  A constant in the range -32768 to 32767, inclusive.
+
+``Sint24``
+  A constant in the range -8388608 to 8388607, inclusive.
+
+``Uint04``
+  A constant in the range 0 to 15, inclusive.
+
+S/390 and zSeries---:samp:`{config/s390/s390.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register (general purpose register except r0)
+
+``c``
+  Condition code register
+
+``d``
+  Data register (arbitrary general purpose register)
+
+``f``
+  Floating-point register
+
+``I``
+  Unsigned 8-bit constant (0--255)
+
+``J``
+  Unsigned 12-bit constant (0--4095)
+
+``K``
+  Signed 16-bit constant (-32768--32767)
+
+``L``
+  Value appropriate as displacement.
+
+  ``(0..4095)``
+    for short displacement
+
+  ``(-524288..524287)``
+    for long displacement
+
+``M``
+  Constant integer with a value of 0x7fffffff.
+
+``N``
+  Multiple letter constraint followed by 4 parameter letters.
+
+  ``0..9:``
+    number of the part counting from most to least significant
+
+  ``H,Q:``
+    mode of the part
+
+  ``D,S,H:``
+    mode of the containing operand
+
+  ``0,F:``
+    value of the other parts (F---all bits set)
+
+  The constraint matches if the specified part of a constant
+  has a value different from its other parts.
+
+``Q``
+  Memory reference without index register and with short displacement.
+
+``R``
+  Memory reference with index register and short displacement.
+
+``S``
+  Memory reference without index register but with long displacement.
+
+``T``
+  Memory reference with index register and long displacement.
+
+``U``
+  Pointer with short displacement.
+
+``W``
+  Pointer with long displacement.
+
+``Y``
+  Shift count operand.
+
+SPARC---:samp:`{config/sparc/sparc.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  Floating-point register on the SPARC-V8 architecture and
+  lower floating-point register on the SPARC-V9 architecture.
+
+``e``
+  Floating-point register.  It is equivalent to :samp:`f` on the
+  SPARC-V8 architecture and contains both lower and upper
+  floating-point registers on the SPARC-V9 architecture.
+
+``c``
+  Floating-point condition code register.
+
+``d``
+  Lower floating-point register.  It is only valid on the SPARC-V9
+  architecture when the Visual Instruction Set is available.
+
+``b``
+  Floating-point register.  It is only valid on the SPARC-V9 architecture
+  when the Visual Instruction Set is available.
+
+``h``
+  64-bit global or out register for the SPARC-V8+ architecture.
+
+``C``
+  The constant all-ones, for floating-point.
+
+``A``
+  Signed 5-bit constant
+
+``D``
+  A vector constant
+
+``I``
+  Signed 13-bit constant
+
+``J``
+  Zero
+
+``K``
+  32-bit constant with the low 12 bits clear (a constant that can be
+  loaded with the ``sethi`` instruction)
+
+``L``
+  A constant in the range supported by ``movcc`` instructions (11-bit
+  signed immediate)
+
+``M``
+  A constant in the range supported by ``movrcc`` instructions (10-bit
+  signed immediate)
+
+``N``
+  Same as :samp:`K`, except that it verifies that bits that are not in the
+  lower 32-bit range are all zero.  Must be used instead of :samp:`K` for
+  modes wider than ``SImode``
+
+``O``
+  The constant 4096
+
+``G``
+  Floating-point zero
+
+``H``
+  Signed 13-bit constant, sign-extended to 32 or 64 bits
+
+``P``
+  The constant -1
+
+``Q``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single sethi
+  instruction
+
+``R``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single mov
+  instruction
+
+``S``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a high/lo_sum
+  instruction sequence
+
+``T``
+  Memory address aligned to an 8-byte boundary
+
+``U``
+  Even register
+
+``W``
+  Memory address for :samp:`e` constraint registers
+
+``w``
+  Memory address with only a base register
+
+``Y``
+  Vector zero
+
+TI C6X family---:samp:`{config/c6x/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register file A (A0--A31).
+
+``b``
+  Register file B (B0--B31).
+
+``A``
+  Predicate registers in register file A (A0--A2 on C64X and
+  higher, A1 and A2 otherwise).
+
+``B``
+  Predicate registers in register file B (B0--B2).
+
+``C``
+  A call-used register in register file B (B0--B9, B16--B31).
+
+``Da``
+  Register file A, excluding predicate registers (A3--A31,
+  plus A0 if not C64X or higher).
+
+``Db``
+  Register file B, excluding predicate registers (B3--B31).
+
+``Iu4``
+  Integer constant in the range 0 ... 15.
+
+``Iu5``
+  Integer constant in the range 0 ... 31.
+
+``In5``
+  Integer constant in the range -31 ... 0.
+
+``Is5``
+  Integer constant in the range -16 ... 15.
+
+``I5x``
+  Integer constant that can be the operand of an ADDA or a SUBA insn.
+
+``IuB``
+  Integer constant in the range 0 ... 65535.
+
+``IsB``
+  Integer constant in the range -32768 ... 32767.
+
+``IsC``
+  Integer constant in the range -2^{20} ... 2^{20} - 1.
+
+``Jc``
+  Integer constant that is a valid mask for the clr instruction.
+
+``Js``
+  Integer constant that is a valid mask for the set instruction.
+
+``Q``
+  Memory location with A base register.
+
+``R``
+  Memory location with B base register.
+
+.. only:: gccint
+
+  ``S0``
+    On C64x+ targets, a GP-relative small data reference.
+
+  ``S1``
+    Any kind of ``SYMBOL_REF``, for use in a call address.
+
+  ``Si``
+    Any kind of immediate operand, unless it matches the S0 constraint.
+
+  ``T``
+    Memory location with B base register, but not using a long offset.
+
+  ``W``
+    A memory operand with an address that cannot be used in an unaligned access.
+
+``Z``
+  Register B14 (aka DP).
+
+Visium---:samp:`{config/visium/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``b``
+  EAM register ``mdb``
+
+``c``
+  EAM register ``mdc``
+
+``f``
+  Floating point register
+
+.. only:: gccint
+
+  ``k``
+    Register for sibcall optimization
+
+``l``
+  General register, but not ``r29``, ``r30`` and ``r31``
+
+``t``
+  Register ``r1``
+
+``u``
+  Register ``r2``
+
+``v``
+  Register ``r3``
+
+``G``
+  Floating-point constant 0.0
+
+``J``
+  Integer constant in the range 0 .. 65535 (16-bit immediate)
+
+``K``
+  Integer constant in the range 1 .. 31 (5-bit immediate)
+
+``L``
+  Integer constant in the range -65535 .. -1 (16-bit negative immediate)
+
+``M``
+  Integer constant -1
+
+``O``
+  Integer constant 0
+
+``P``
+  Integer constant 32
+
+x86 family---:samp:`{config/i386/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R``
+  Legacy register---the eight integer registers available on all
+  i386 processors (``a``, ``b``, ``c``, ``d``,
+  ``si``, ``di``, ``bp``, ``sp``).
+
+``q``
+  Any register accessible as ``rl``.  In 32-bit mode, ``a``,
+  ``b``, ``c``, and ``d`` ; in 64-bit mode, any integer register.
+
+``Q``
+  Any register accessible as ``rh`` : ``a``, ``b``,
+  ``c``, and ``d``.
+
+.. only:: gccint
+
+  ``l``
+    Any register that can be used as the index in a base+index memory
+    access: that is, any general register except the stack pointer.
+
+``a``
+  The ``a`` register.
+
+``b``
+  The ``b`` register.
+
+``c``
+  The ``c`` register.
+
+``d``
+  The ``d`` register.
+
+``S``
+  The ``si`` register.
+
+``D``
+  The ``di`` register.
+
+``A``
+  The ``a`` and ``d`` registers.  This class is used for instructions
+  that return double word results in the ``ax:dx`` register pair.  Single
+  word values will be allocated either in ``ax`` or ``dx``.
+  For example on i386 the following implements ``rdtsc`` :
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned long long tick;
+      __asm__ __volatile__("rdtsc":"=A"(tick));
+      return tick;
+    }
+
+  This is not correct on x86-64 as it would allocate tick in either ``ax``
+  or ``dx``.  You have to use the following variant instead:
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned int tickl, tickh;
+      __asm__ __volatile__("rdtsc":"=a"(tickl),"=d"(tickh));
+      return ((unsigned long long)tickh << 32)|tickl;
+    }
+
+``U``
+  The call-clobbered integer registers.
+
+``f``
+  Any 80387 floating-point (stack) register.
+
+``t``
+  Top of 80387 floating-point stack (``%st(0)``).
+
+``u``
+  Second from top of 80387 floating-point stack (``%st(1)``).
+
+.. only:: gccint
+
+  ``Yk``
+    Any mask register that can be used as a predicate, i.e. ``k1-k7``.
+
+  ``k``
+    Any mask register.
+
+``y``
+  Any MMX register.
+
+``x``
+  Any SSE register.
+
+``v``
+  Any EVEX encodable SSE register (``%xmm0-%xmm31``).
+
+.. only:: gccint
+
+  ``w``
+    Any bound register.
+
+``Yz``
+  First SSE register (``%xmm0``).
+
+.. only:: gccint
+
+  ``Yi``
+    Any SSE register, when SSE2 and inter-unit moves are enabled.
+
+  ``Yj``
+    Any SSE register, when SSE2 and inter-unit moves from vector registers are enabled.
+
+  ``Ym``
+    Any MMX register, when inter-unit moves are enabled.
+
+  ``Yn``
+    Any MMX register, when inter-unit moves from vector registers are enabled.
+
+  ``Yp``
+    Any integer register when ``TARGET_PARTIAL_REG_STALL`` is disabled.
+
+  ``Ya``
+    Any integer register when zero extensions with ``AND`` are disabled.
+
+  ``Yb``
+    Any register that can be used as the GOT base when calling
+
+    ``___tls_get_addr`` : that is, any general register except ``a``
+    and ``sp`` registers, for :option:`-fno-plt` if linker supports it.
+    Otherwise, ``b`` register.
+
+  ``Yf``
+    Any x87 register when 80387 floating-point arithmetic is enabled.
+
+  ``Yr``
+    Lower SSE register when avoiding REX prefix and all SSE registers otherwise.
+
+  ``Yv``
+    For AVX512VL, any EVEX-encodable SSE register (``%xmm0-%xmm31``),
+    otherwise any SSE register.
+
+  ``Yh``
+    Any EVEX-encodable SSE register, that has number factor of four.
+
+  ``Bf``
+    Flags register operand.
+
+  ``Bg``
+    GOT memory operand.
+
+  ``Bm``
+    Vector memory operand.
+
+  ``Bc``
+    Constant memory operand.
+
+``Bn``
+  Memory operand without REX prefix.
+
+``Bs``
+  Sibcall memory operand.
+
+``Bw``
+  Call memory operand.
+
+``Bz``
+  Constant call address operand.
+
+``BC``
+  SSE constant -1 operand.
+
+``I``
+  Integer constant in the range 0 ... 31, for 32-bit shifts.
+
+``J``
+  Integer constant in the range 0 ... 63, for 64-bit shifts.
+
+``K``
+  Signed 8-bit integer constant.
+
+``L``
+  ``0xFF`` or ``0xFFFF``, for andsi as a zero-extending move.
+
+``M``
+  0, 1, 2, or 3 (shifts for the ``lea`` instruction).
+
+``N``
+  Unsigned 8-bit integer constant (for ``in`` and ``out``
+  instructions).
+
+.. only:: gccint
+
+  ``O``
+    Integer constant in the range 0 ... 127, for 128-bit shifts.
+
+``G``
+  Standard 80387 floating point constant.
+
+``C``
+  SSE constant zero operand.
+
+``e``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in sign-extending x86-64
+  instructions).
+
+``We``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for sign-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wz``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for zero-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wd``
+  128-bit integer constant where both the high and low 64-bit word
+  satisfy the ``e`` constraint.
+
+``Z``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in zero-extending x86-64
+  instructions).
+
+``Tv``
+  VSIB address operand.
+
+``Ts``
+  Address operand without segment register.
+
+Xstormy16---:samp:`{config/stormy16/stormy16.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register r0.
+
+``b``
+  Register r1.
+
+``c``
+  Register r2.
+
+``d``
+  Register r8.
+
+``e``
+  Registers r0 through r7.
+
+``t``
+  Registers r0 and r1.
+
+``y``
+  The carry register.
+
+``z``
+  Registers r8 and r9.
+
+``I``
+  A constant between 0 and 3 inclusive.
+
+``J``
+  A constant that has exactly one bit set.
+
+``K``
+  A constant that has exactly one bit clear.
+
+``L``
+  A constant between 0 and 255 inclusive.
+
+``M``
+  A constant between -255 and 0 inclusive.
+
+``N``
+  A constant between -3 and 0 inclusive.
+
+``O``
+  A constant between 1 and 4 inclusive.
+
+``P``
+  A constant between -4 and -1 inclusive.
+
+``Q``
+  A memory reference that is a stack push.
+
+``R``
+  A memory reference that is a stack pop.
+
+``S``
+  A memory reference that refers to a constant address of known value.
+
+``T``
+  The register indicated by Rx (not implemented yet).
+
+``U``
+  A constant that is not between 2 and 15 inclusive.
+
+``Z``
+  The constant 0.
+
+Xtensa---:samp:`{config/xtensa/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General-purpose 32-bit register
+
+``b``
+  One-bit boolean register
+
+``A``
+  MAC16 40-bit accumulator register
+
+``I``
+  Signed 12-bit integer constant, for use in MOVI instructions
+
+``J``
+  Signed 8-bit integer constant, for use in ADDI instructions
+
+``K``
+  Integer constant valid for BccI instructions
+
+``L``
+  Unsigned constant valid for BccUI instructions
\ No newline at end of file
diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 00000000000..f5558030ca8
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,3 @@
+Sphinx>=5.3
+furo
+sphinx_copybutton
diff --git a/gcc/d/doc/conf.py b/gcc/d/doc/conf.py
new file mode 100644
index 00000000000..c33f28a2f7f
--- /dev/null
+++ b/gcc/d/doc/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'gdc'
+project = 'The GNU D Compiler'
+copyright = '2006-2022 Free Software Foundation, Inc.'
+authors = 'David Friedman, Iain Buclaw'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invoking-gdc', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/d/doc/copyright.rst b/gcc/d/doc/copyright.rst
new file mode 100644
index 00000000000..5afce611a7a
--- /dev/null
+++ b/gcc/d/doc/copyright.rst
@@ -0,0 +1,13 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is in the :ref:`gnu_fdl`.
\ No newline at end of file
diff --git a/gcc/d/doc/general-public-license-3.rst b/gcc/d/doc/general-public-license-3.rst
new file mode 100644
index 00000000000..becda773ca0
--- /dev/null
+++ b/gcc/d/doc/general-public-license-3.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gpl-3.0.rst
\ No newline at end of file
diff --git a/gcc/d/doc/gnu-free-documentation-license.rst b/gcc/d/doc/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/d/doc/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/d/doc/index.rst b/gcc/d/doc/index.rst
new file mode 100644
index 00000000000..700a4a8d885
--- /dev/null
+++ b/gcc/d/doc/index.rst
@@ -0,0 +1,22 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The GNU D Compiler
+==================
+
+This manual describes how to use :command:`gdc`, the GNU compiler for
+the D programming language.  This manual is specifically about
+:command:`gdc`.  For more information about the D programming
+language in general, including language specifications and standard
+package documentation, see https://dlang.org/.
+
+.. toctree::
+
+  copyright
+  invoking-gdc
+  general-public-license-3
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/d/doc/indices-and-tables.rst b/gcc/d/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/d/doc/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc.rst b/gcc/d/doc/invoking-gdc.rst
new file mode 100644
index 00000000000..be477b82f07
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc.rst
@@ -0,0 +1,48 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _invoking-gdc:
+
+Invoking gdc
+------------
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  gdc [ :option:`-c` | :option:`-S` ] [ :option:`-g` ] [ :option:`-pg` ]
+      [ :option:`-O`:samp:`{level}` ] [ :option:`-W`:samp:`{warn}`...]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-L`:samp:`{dir}`...]
+      [ :option:`-f`:samp:`{option}`...] [ :option:`-m`:samp:`{machine-option}`...]
+      [ :option:`-o` :samp:`{outfile}` ] [@ :samp:`{file}` ] :samp:`{infile}`...
+
+  Only the most useful options are listed here; see below for the
+  remainder.
+
+Description
+^^^^^^^^^^^
+
+The :command:`gdc` command is the GNU compiler for the D language and
+supports many of the same options as :command:`gcc`.  See :ref:`gcc:option-summary`.
+This manual only documents the options specific to :command:`gdc`.
+
+Options
+^^^^^^^
+
+.. toctree::
+  :maxdepth: 2
+
+  invoking-gdc/input-and-output-files
+  invoking-gdc/runtime-options
+  invoking-gdc/options-for-directory-search
+  invoking-gdc/code-generation
+  invoking-gdc/warnings
+  invoking-gdc/options-for-linking
+  invoking-gdc/developer-options
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/code-generation.rst b/gcc/d/doc/invoking-gdc/code-generation.rst
new file mode 100644
index 00000000000..178b6f98fe2
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/code-generation.rst
@@ -0,0 +1,170 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, code generation
+
+.. _code-generation:
+
+Code Generation
+***************
+
+In addition to the many :command:`gcc` options controlling code generation,
+:command:`gdc` has several options specific to itself.
+
+.. option:: -H
+
+  .. index:: -H
+
+  Generates D interface files for all modules being compiled.  The compiler
+  determines the output file based on the name of the input file, removes
+  any directory components and suffix, and applies the :samp:`.di` suffix.
+
+.. option:: -Hd dir
+
+  .. index:: -Hd
+
+  Same as :option:`-H`, but writes interface files to directory :samp:`{dir}`.
+  This option can be used with :option:`-Hf file` to independently set the
+  output file and directory path.
+
+.. option:: -Hf file
+
+  .. index:: -Hf
+
+  Same as :option:`-H` but writes interface files to :samp:`{file}`.  This option can
+  be used with :option:`-Hd dir` to independently set the output file and
+  directory path.
+
+.. option:: -M
+
+  .. index:: -M
+
+  Output the module dependencies of all source files being compiled in a
+  format suitable for :command:`make`.  The compiler outputs one
+  :command:`make` rule containing the object file name for that source file,
+  a colon, and the names of all imported files.
+
+.. option:: -MM
+
+  .. index:: -MM
+
+  Like :option:`-M` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -MF file
+
+  .. index:: -MF
+
+  When used with :option:`-M` or :option:`-MM`, specifies a :samp:`{file}` to write
+  the dependencies to.  When used with the driver options :option:`-MD` or
+  :option:`-MMD`, :option:`-MF` overrides the default dependency output file.
+
+.. option:: -MG
+
+  .. index:: -MG
+
+  This option is for compatibility with :command:`gcc`, and is ignored by the
+  compiler.
+
+.. option:: -MP
+
+  .. index:: -MP
+
+  Outputs a phony target for each dependency other than the modules being
+  compiled, causing each to depend on nothing.
+
+.. option:: -MT target
+
+  .. index:: -MT
+
+  Change the :samp:`{target}` of the rule emitted by dependency generation
+  to be exactly the string you specify.  If you want multiple targets,
+  you can specify them as a single argument to :option:`-MT`, or use
+  multiple :option:`-MT` options.
+
+.. option:: -MQ target
+
+  .. index:: -MQ
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  :command:`make`.
+
+.. option:: -MD
+
+  .. index:: -MD
+
+  This option is equivalent to :option:`-M -MF file`.  The driver
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.deps` suffix.
+
+.. option:: -MMD
+
+  .. index:: -MMD
+
+  Like :option:`-MD` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -X
+
+  .. index:: -X
+
+  Output information describing the contents of all source files being
+  compiled in JSON format to a file.  The driver determines :samp:`{file}` by
+  removing any directory components and suffix from the input file, and then
+  adding a :samp:`.json` suffix.
+
+.. option:: -Xf file
+
+  .. index:: -Xf
+
+  Same as :option:`-X`, but writes all JSON contents to the specified
+  :samp:`{file}`.
+
+.. option:: -fdoc
+
+  .. index:: -fdoc
+
+  Generates ``Ddoc`` documentation and writes it to a file.  The compiler
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.html` suffix.
+
+.. option:: -fdoc-dir=dir
+
+  .. index:: -fdoc-dir
+
+  Same as :option:`-fdoc`, but writes documentation to directory :samp:`{dir}`.
+  This option can be used with :option:`-fdoc-file=file` to
+  independently set the output file and directory path.
+
+.. option:: -fdoc-file=file
+
+  .. index:: -fdoc-file
+
+  Same as :option:`-fdoc`, but writes documentation to :samp:`{file}`.  This
+  option can be used with :option:`-fdoc-dir=dir` to independently
+  set the output file and directory path.
+
+.. option:: -fdoc-inc=file
+
+  .. index:: -fdoc-inc
+
+  Specify :samp:`{file}` as a :samp:`{Ddoc}` macro file to be read.  Multiple
+  :option:`-fdoc-inc` options can be used, and files are read and processed
+  in the same order.
+
+.. option::  -fdump-c++-spec={file}
+
+  For D source files, generate corresponding C++ declarations in :samp:`{file}`.
+
+.. option:: -fdump-c++-spec-verbose
+
+  In conjunction with :option:`-fdump-c++-spec=` above, add comments for ignored
+  declarations in the generated C++ header.
+
+.. option:: -fsave-mixins={file}
+
+  Generates code expanded from D ``mixin`` statements and writes the
+  processed sources to :samp:`{file}`.  This is useful to debug errors in compilation
+  and provides source for debuggers to show when requested.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/developer-options.rst b/gcc/d/doc/invoking-gdc/developer-options.rst
new file mode 100644
index 00000000000..564ed36d6c0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/developer-options.rst
@@ -0,0 +1,31 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: developer options, debug dump options, dump options
+
+.. _developer-options:
+
+Developer Options
+*****************
+
+This section describes command-line options that are primarily of
+interest to developers or language tooling.
+
+.. option:: -fdump-d-original
+
+  .. index:: -fdump-d-original
+
+  Output the internal front-end AST after the ``semantic3`` stage.
+  This option is only useful for debugging the GNU D compiler itself.
+
+.. option:: -v
+
+  .. index:: -v
+
+  Dump information about the compiler language processing stages as the source
+  program is being compiled.  This includes listing all modules that are
+  processed through the ``parse``, ``semantic``, ``semantic2``, and
+  ``semantic3`` stages; all ``import`` modules and their file paths;
+  and all ``function`` bodies that are being compiled.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/input-and-output-files.rst b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
new file mode 100644
index 00000000000..a4bce6b9aba
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
@@ -0,0 +1,45 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: suffixes for D source, D source file suffixes
+
+.. _input-and-output-files:
+
+Input and Output files
+**********************
+
+For any given input file, the file name suffix determines what kind of
+compilation is done.  The following kinds of input file names are supported:
+
+:samp:`{file}.d`
+  D source files.
+
+:samp:`{file}.dd`
+  Ddoc source files.
+
+:samp:`{file}.di`
+  D interface files.
+
+You can specify more than one input file on the :command:`gdc` command line,
+each being compiled separately in the compilation process.  If you specify a
+``-o file`` option, all the input files are compiled together,
+producing a single output file, named :samp:`{file}`.  This is allowed even
+when using ``-S`` or ``-c``.
+
+.. index:: D interface files.
+
+A D interface file contains only what an import of the module needs,
+rather than the whole implementation of that module.  They can be created
+by :command:`gdc` from a D source file by using the ``-H`` option.
+When the compiler resolves an import declaration, it searches for matching
+:samp:`.di` files first, then for :samp:`.d`.
+
+.. index:: Ddoc source files.
+
+A Ddoc source file contains code in the D macro processor language.  It is
+primarily designed for use in producing user documentation from embedded
+comments, with a slight affinity towards HTML generation.  If a :samp:`.d`
+source file starts with the string ``Ddoc`` then it is treated as general
+purpose documentation, not as a D source file.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-directory-search.rst b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
new file mode 100644
index 00000000000..934b22df5b0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
@@ -0,0 +1,92 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: directory options, options, directory search, search path
+
+.. _directory-options:
+
+Options for Directory Search
+****************************
+
+These options specify directories to search for files, libraries, and
+other parts of the compiler:
+
+.. option:: -Idir
+
+  .. index:: -I
+
+  Specify a directory to use when searching for imported modules at
+  compile time.  Multiple :option:`-I` options can be used, and the
+  paths are searched in the same order.
+
+.. option:: -Jdir
+
+  .. index:: -J
+
+  Specify a directory to use when searching for files in string imports
+  at compile time.  This switch is required in order to use
+  ``import(file)`` expressions.  Multiple :option:`-J` options can be
+  used, and the paths are searched in the same order.
+
+.. option:: -Ldir
+
+  .. index:: -L
+
+  When linking, specify a library search directory, as with :command:`gcc`.
+
+.. option:: -Bdir
+
+  .. index:: -B
+
+  This option specifies where to find the executables, libraries,
+  source files, and data files of the compiler itself, as with :command:`gcc`.
+
+.. option:: -fmodule-file=module=spec
+
+  .. index:: -fmodule-file
+
+  This option manipulates file paths of imported modules, such that if an
+  imported module matches all or the leftmost part of :samp:`{module}`, the file
+  path in :samp:`{spec}` is used as the location to search for D sources.
+  This is used when the source file path and names are not the same as the
+  package and module hierarchy.  Consider the following examples:
+
+  .. code-block:: c++
+
+    gdc test.d -fmodule-file=A.B=foo.d -fmodule-file=C=bar
+
+  This will tell the compiler to search in all import paths for the source
+  file :samp:`{foo.d}` when importing :samp:`{A.B}`, and the directory :samp:`{bar/}`
+  when importing :samp:`{C}`, as annotated in the following D code:
+
+  .. code-block:: c++
+
+    module test;
+    import A.B;     // Matches A.B, searches for foo.d
+    import C.D.E;   // Matches C, searches for bar/D/E.d
+    import A.B.C;   // No match, searches for A/B/C.d
+
+.. option:: -imultilib dir
+
+  .. index:: -imultilib
+
+  Use :samp:`{dir}` as a subdirectory of the gcc directory containing
+  target-specific D sources and interfaces.
+
+.. option:: -iprefix prefix
+
+  .. index:: -iprefix
+
+  Specify :samp:`{prefix}` as the prefix for the gcc directory containing
+  target-specific D sources and interfaces.  If the :samp:`{prefix}` represents
+  a directory, you should include the final ``'/'``.
+
+.. option:: -nostdinc
+
+  .. index:: -nostdinc
+
+  Do not search the standard system directories for D source and interface
+  files.  Only the directories that have been specified with :option:`-I` options
+  (and the directory of the current file, if appropriate) are searched.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-linking.rst b/gcc/d/doc/invoking-gdc/options-for-linking.rst
new file mode 100644
index 00000000000..dc64fcd206a
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-linking.rst
@@ -0,0 +1,59 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, linking, linking, static
+
+.. _linking:
+
+Options for Linking
+*******************
+
+These options come into play when the compiler links object files into an
+executable output file.  They are meaningless if the compiler is not doing
+a link step.
+
+.. option:: -defaultlib=libname
+
+  .. index:: -defaultlib=
+
+  Specify the library to use instead of libphobos when linking.  Options
+  specifying the linkage of libphobos, such as :option:`-static-libphobos`
+  or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -debuglib=libname
+
+  .. index:: -debuglib=
+
+  Specify the debug library to use instead of libphobos when linking.
+  This option has no effect unless the :option:`-g` option was also given
+  on the command line.  Options specifying the linkage of libphobos, such
+  as :option:`-static-libphobos` or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -nophoboslib
+
+  .. index:: -nophoboslib
+
+  Do not use the Phobos or D runtime library when linking.  Options specifying
+  the linkage of libphobos, such as :option:`-static-libphobos` or
+  :option:`-shared-libphobos`, are ignored.  The standard system libraries are
+  used normally, unless :option:`-nostdlib` or :option:`-nodefaultlibs` is used.
+
+.. option:: -shared-libphobos
+
+  .. index:: -shared-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the shared
+  version.  If no shared version was built when the compiler was configured,
+  this option has no effect.
+
+.. option:: -static-libphobos
+
+  .. index:: -static-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the static
+  version.  If no static version was built when the compiler was configured,
+  this option has no effect.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/runtime-options.rst b/gcc/d/doc/invoking-gdc/runtime-options.rst
new file mode 100644
index 00000000000..fda87c2b96e
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/runtime-options.rst
@@ -0,0 +1,314 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, runtime
+
+.. _runtime-options:
+
+Runtime Options
+***************
+
+These options affect the runtime behavior of programs compiled with
+:command:`gdc`.
+
+.. option:: -fall-instantiations
+
+  .. index:: -fall-instantiations, -fno-all-instantiations
+
+  Generate code for all template instantiations.  The default template emission
+  strategy is to not generate code for declarations that were either
+  instantiated speculatively, such as from ``__traits(compiles, ...)``, or
+  that come from an imported module not being compiled.
+
+.. option:: -fno-assert
+
+  .. index:: -fassert, -fno-assert
+
+  Turn off code generation for ``assert`` contracts.
+
+.. option:: -fno-bounds-check
+
+  .. index:: -fbounds-check, -fno-bounds-check
+
+  Turns off array bounds checking for all functions, which can improve
+  performance for code that uses arrays extensively.  Note that this
+  can result in unpredictable behavior if the code in question actually
+  does violate array bounds constraints.  It is safe to use this option
+  if you are sure that your code never throws a ``RangeError``.
+
+.. option:: -fbounds-check=value
+
+  .. index:: -fbounds-check=
+
+  An alternative to :option:`-fbounds-check` that allows more control
+  as to where bounds checking is turned on or off.  The following values
+  are supported:
+
+  :samp:`on`
+    Turns on array bounds checking for all functions.
+
+  :samp:`safeonly`
+    Turns on array bounds checking only for ``@safe`` functions.
+
+  :samp:`off`
+    Turns off array bounds checking completely.
+
+.. option:: -fno-builtin
+
+  .. index:: -fbuiltin, -fno-builtin
+
+  Don't recognize built-in functions unless they begin with the prefix
+  :samp:`__builtin_`.  By default, the compiler will recognize when a
+  function in the ``core.stdc`` package is a built-in function.
+
+.. option:: -fcheckaction
+
+  This option controls what code is generated on an assertion, bounds check, or
+  final switch failure.  The following values are supported:
+
+  :samp:`context`
+    Throw an ``AssertError`` with extra context information.
+
+  :samp:`halt`
+    Halt the program execution.
+
+  :samp:`throw`
+    Throw an ``AssertError`` (the default).
+
+.. option:: -fdebug=value
+
+  .. index:: -fno-debug
+
+  Turn on compilation of conditional ``debug`` code into the program.
+  The :option:`-fdebug` option itself sets the debug level to ``1``,
+  while :option:`-fdebug=` enables ``debug`` code that are identified
+  by any of the following values:
+
+  :samp:`level`
+    Sets the debug level to :samp:`{level}`, any ``debug`` code <= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of any ``debug`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-druntime
+
+  .. index:: -fdruntime, -fno-druntime
+
+  Implements https://dlang.org/spec/betterc.html.  Assumes that
+  compilation targets an environment without a D runtime library.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -nophoboslib -fno-exceptions -fno-moduleinfo -fno-rtti
+
+.. option:: -fextern-std=standard
+
+  Sets the C++ name mangling compatibility to the version identified by
+  :samp:`{standard}`.  The following values are supported:
+
+  :samp:`c++98`, :samp:`c++03`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``199711``.
+
+  :samp:`c++11`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201103``.
+
+  :samp:`c++14`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201402``.
+
+  :samp:`c++17`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201703``.
+    This is the default.
+
+  :samp:`c++20`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``202002``.
+
+.. option:: -fno-invariants
+
+  .. index:: -finvariants, -fno-invariants
+
+  Turns off code generation for class ``invariant`` contracts.
+
+.. option:: -fmain
+
+  Generates a default ``main()`` function when compiling.  This is useful when
+  unittesting a library, as it enables running the unittests in a library without
+  having to manually define an entry-point function.  This option does nothing
+  when ``main`` is already defined in user code.
+
+.. option:: -fno-moduleinfo
+
+  Turns off generation of the ``ModuleInfo`` and related functions
+  that would become unreferenced without it, which may allow linking
+  to programs not written in D.  Functions that are not be generated
+  include module constructors and destructors (``static this`` and
+  ``static ~this``), ``unittest`` code, and ``DSO`` registry
+  functions for dynamically linked code.
+
+.. option:: -fonly=filename
+
+  .. index:: -fonly
+
+  Tells the compiler to parse and run semantic analysis on all modules
+  on the command line, but only generate code for the module specified
+  by :samp:`{filename}`.
+
+.. option:: -fno-postconditions
+
+  .. index:: -fpostconditions, -fno-postconditions
+
+  Turns off code generation for postcondition ``out`` contracts.
+
+.. option:: -fno-preconditions
+
+  .. index:: -fpreconditions, -fno-preconditions
+
+  Turns off code generation for precondition ``in`` contracts.
+
+.. option:: -fpreview=id
+
+  .. index:: -fpreview
+
+  Turns on an upcoming D language change identified by :samp:`{id}`.  The following
+  values are supported:
+
+  :samp:`all`
+    Turns on all upcoming D language features.
+
+  :samp:`dip1000`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1000.md
+    (Scoped pointers).
+
+  :samp:`dip1008`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1008.md
+    (Allow exceptions in ``@nogc`` code).
+
+  :samp:`dip1021`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/accepted/DIP1021.md
+    (Mutable function arguments).
+
+  :samp:`dip25`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns on generation for destructing fields of partially constructed objects.
+
+  :samp:`fieldwise`
+    Turns on generation of struct equality to use field-wise comparisons.
+
+  :samp:`fixaliasthis`
+    Implements new lookup rules that check the current scope for ``alias this``
+    before searching in upper scopes.
+
+  :samp:`fiximmutableconv`
+    Disallows unsound immutable conversions that were formerly incorrectly
+    permitted.
+
+  :samp:`in`
+    Implements ``in`` parameters to mean ``scope const [ref]`` and accepts
+    rvalues.
+
+  :samp:`inclusiveincontracts`
+    Implements ``in`` contracts of overridden methods to be a superset of parent
+    contract.
+
+  :samp:`intpromote`
+    Implements C-style integral promotion for unary ``+``, ``-`` and ``~``
+    expressions.
+
+  :samp:`nosharedaccess`
+    Turns off and disallows all access to shared memory objects.
+
+  :samp:`rvaluerefparam`
+    Implements rvalue arguments to ``ref`` parameters.
+
+  :samp:`systemvariables`
+    Disables access to variables marked ``@system`` from ``@safe`` code.
+
+.. option:: -frelease
+
+  .. index:: -fno-release
+
+  Turns on compiling in release mode, which means not emitting runtime
+  checks for contracts and asserts.  Array bounds checking is not done
+  for ``@system`` and ``@trusted`` functions, and assertion
+  failures are undefined behavior.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -fno-assert -fbounds-check=safe -fno-invariants \
+        -fno-postconditions -fno-preconditions -fno-switch-errors
+
+.. option:: -frevert=
+
+  .. index:: -frevert
+
+  Turns off a D language feature identified by :samp:`{id}`.  The following values
+  are supported:
+
+  :samp:`all`
+    Turns off all revertable D language features.
+
+  :samp:`dip25`
+    Reverts https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns off generation for destructing fields of partially constructed objects.
+
+  :samp:`markdown`
+    Turns off Markdown replacements in Ddoc comments.
+
+.. option:: -fno-rtti
+
+  .. index:: -frtti, -fno-rtti
+
+  Turns off generation of run-time type information for all user defined types.
+  Any code that uses features of the language that require access to this
+  information will result in an error.
+
+.. option:: -fno-switch-errors
+
+  .. index:: -fswitch-errors, -fno-switch-errors
+
+  This option controls what code is generated when no case is matched
+  in a ``final switch`` statement.  The default run time behavior
+  is to throw a ``SwitchError``.  Turning off :option:`-fswitch-errors`
+  means that instead the execution of the program is immediately halted.
+
+.. option:: -funittest
+
+  .. index:: -funittest, -fno-unittest
+
+  Turns on compilation of ``unittest`` code, and turns on the
+  ``version(unittest)`` identifier.  This implies :option:`-fassert`.
+
+.. option:: -fversion=value
+
+  .. index:: -fversion
+
+  Turns on compilation of conditional ``version`` code into the program
+  identified by any of the following values:
+
+  :samp:`level`
+    Sets the version level to :samp:`{level}`, any ``version`` code >= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of ``version`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-weak-templates
+
+  .. index:: -fweak-templates, -fno-weak-templates
+
+  Turns off emission of declarations that can be defined in multiple objects as
+  weak symbols.  The default is to emit all public symbols as weak, unless the
+  target lacks support for weak symbols.  Disabling this option means that common
+  symbols are instead put in COMDAT or become private.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/warnings.rst b/gcc/d/doc/invoking-gdc/warnings.rst
new file mode 100644
index 00000000000..c9ed52e7630
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/warnings.rst
@@ -0,0 +1,148 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options to control warnings, warning messages, messages, warning, suppressing warnings
+
+.. _warnings:
+
+Warnings
+********
+
+Warnings are diagnostic messages that report constructions that
+are not inherently erroneous but that are risky or suggest there
+is likely to be a bug in the program.  Unless :option:`-Werror` is
+specified, they do not prevent compilation of the program.
+
+.. option:: -Wall
+
+  .. index:: -Wall, -Wno-all
+
+  Turns on all warnings messages.  Warnings are not a defined part of
+  the D language, and all constructs for which this may generate a
+  warning message are valid code.
+
+.. option:: -Walloca
+
+  .. index:: -Walloca
+
+  This option warns on all uses of "alloca" in the source.
+
+.. option:: -Walloca-larger-than=n
+
+  .. index:: -Walloca-larger-than, -Wno-alloca-larger-than
+
+  Warn on unbounded uses of alloca, and on bounded uses of alloca
+  whose bound can be larger than :samp:`{n}` bytes.
+  :option:`-Wno-alloca-larger-than` disables
+  :option:`-Walloca-larger-than` warning and is equivalent to
+  :option:`-Walloca-larger-than=SIZE_MAX` or larger.
+
+.. option:: -Wcast-result
+
+  .. index:: -Wcast-result, -Wno-cast-result
+
+  Warn about casts that will produce a null or zero result.  Currently
+  this is only done for casting between an imaginary and non-imaginary
+  data type, or casting between a D and C++ class.
+
+.. option:: -Wno-deprecated
+
+  .. index:: -Wdeprecated, -Wno-deprecated
+
+  Do not warn about usage of deprecated features and symbols with
+  ``deprecated`` attributes.
+
+.. option:: -Werror
+
+  .. index:: -Werror, -Wno-error
+
+  Turns all warnings into errors.
+
+.. option:: -Wspeculative
+
+  .. index:: -Wspeculative, -Wno-speculative
+
+  List all error messages from speculative compiles, such as
+  ``__traits(compiles, ...)``.  This option does not report
+  messages as warnings, and these messages therefore never become
+  errors when the :option:`-Werror` option is also used.
+
+.. option:: -Wtemplates
+
+  .. index:: -Wtemplates, -Wno-templates
+
+  Warn when a template instantiation is encountered.  Some coding
+  rules disallow templates, and this may be used to enforce that rule.
+
+.. option:: -Wunknown-pragmas
+
+  .. index:: -Wunknown-pragmas, -Wno-unknown-pragmas
+
+  Warn when a ``pragma()`` is encountered that is not understood by
+  :command:`gdc`.  This differs from :option:`-fignore-unknown-pragmas`
+  where a pragma that is part of the D language, but not implemented by
+  the compiler, won't get reported.
+
+.. option:: -Wno-varargs
+
+  .. index:: Wvarargs, Wno-varargs
+
+  Do not warn upon questionable usage of the macros used to handle variable
+  arguments like ``va_start``.
+
+.. option:: -fignore-unknown-pragmas
+
+  .. index:: -fignore-unknown-pragmas, -fno-ignore-unknown-pragmas
+
+  Turns off errors for unsupported pragmas.
+
+.. option:: -fmax-errors=n
+
+  .. index:: -fmax-errors
+
+  Limits the maximum number of error messages to :samp:`{n}`, at which point
+  :command:`gdc` bails out rather than attempting to continue processing the
+  source code.  If :samp:`{n}` is 0 (the default), there is no limit on the
+  number of error messages produced.
+
+.. option:: -fsyntax-only
+
+  .. index:: -fsyntax-only, -fno-syntax-only
+
+  Check the code for syntax errors, but do not actually compile it.  This
+  can be used in conjunction with :option:`-fdoc` or :option:`-H` to generate
+  files for each module present on the command-line, but no other output
+  file.
+
+.. option:: -ftransition=id
+
+  .. index:: -ftransition
+
+  Report additional information about D language changes identified by
+  :samp:`{id}`.  The following values are supported:
+
+  :samp:`all`
+    List information on all D language transitions.
+
+  :samp:`complex`
+    List all usages of complex or imaginary types.
+
+  :samp:`field`
+    List all non-mutable fields which occupy an object instance.
+
+  :samp:`in`
+    List all usages of ``in`` on parameter.
+
+  :samp:`nogc`
+    List all hidden GC allocations.
+
+  :samp:`templates`
+    List statistics on template instantiations.
+
+  :samp:`tls`
+    List all variables going into thread local storage.
+
+  :samp:`vmarkdown`
+    List instances of Markdown replacements in Ddoc.
\ No newline at end of file
diff --git a/gcc/doc/cpp/character-sets.rst b/gcc/doc/cpp/character-sets.rst
new file mode 100644
index 00000000000..f4b6e05515c
--- /dev/null
+++ b/gcc/doc/cpp/character-sets.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _character-sets:
+
+Character sets
+**************
+
+Source code character set processing in C and related languages is
+rather complicated.  The C standard discusses two character sets, but
+there are really at least four.
+
+The files input to CPP might be in any character set at all.  CPP's
+very first action, before it even looks for line boundaries, is to
+convert the file into the character set it uses for internal
+processing.  That set is what the C standard calls the :dfn:`source`
+character set.  It must be isomorphic with ISO 10646, also known as
+Unicode.  CPP uses the UTF-8 encoding of Unicode.
+
+The character sets of the input files are specified using the
+:option:`-finput-charset=` option.
+
+All preprocessing work (the subject of the rest of this manual) is
+carried out in the source character set.  If you request textual
+output from the preprocessor with the :option:`-E` option, it will be
+in UTF-8.
+
+After preprocessing is complete, string and character constants are
+converted again, into the :dfn:`execution` character set.  This
+character set is under control of the user; the default is UTF-8,
+matching the source character set.  Wide string and character
+constants have their own character set, which is not called out
+specifically in the standard.  Again, it is under control of the user.
+The default is UTF-16 or UTF-32, whichever fits in the target's
+``wchar_t`` type, in the target machine's byte
+order [#f1]_.
+
+Octal and hexadecimal escape sequences do not undergo
+conversion; ``'\x12'`` has the value 0x12 regardless of the currently
+selected execution character set.  All other escapes are replaced by
+the character in the source character set that they represent, then
+converted to the execution character set, just like unescaped
+characters.
+
+In identifiers, characters outside the ASCII range can be specified
+with the :samp:`\\u` and :samp:`\\U` escapes or used directly in the input
+encoding.  If strict ISO C90 conformance is specified with an option
+such as :option:`-std=c90`, or :option:`-fno-extended-identifiers` is
+used, then those constructs are not permitted in identifiers.
+
+.. [#f1] UTF-16 does not meet the requirements of the C
+  standard for a wide character set, but the choice of 16-bit
+  ``wchar_t`` is enshrined in some system ABIs so we cannot fix
+  this.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-syntax.rst b/gcc/doc/cpp/conditional-syntax.rst
new file mode 100644
index 00000000000..1dec2ac6f4b
--- /dev/null
+++ b/gcc/doc/cpp/conditional-syntax.rst
@@ -0,0 +1,411 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #if
+
+.. _conditional-syntax:
+
+Conditional Syntax
+******************
+
+A conditional in the C preprocessor begins with a :dfn:`conditional
+directive`: :samp:`#if`, :samp:`#ifdef` or :samp:`#ifndef`.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: #ifdef, #endif
+
+.. _ifdef:
+
+Ifdef
+^^^^^
+
+The simplest sort of conditional is
+
+.. code-block:: c++
+
+  #ifdef MACRO
+
+  controlled text
+
+  #endif /* MACRO */
+
+.. index:: conditional group
+
+This block is called a :dfn:`conditional group`.  :samp:`{controlled text}`
+will be included in the output of the preprocessor if and only if
+:samp:`{MACRO}` is defined.  We say that the conditional :dfn:`succeeds` if
+:samp:`{MACRO}` is defined, :dfn:`fails` if it is not.
+
+The :samp:`{controlled text}` inside of a conditional can include
+preprocessing directives.  They are executed only if the conditional
+succeeds.  You can nest conditional groups inside other conditional
+groups, but they must be completely nested.  In other words,
+:samp:`#endif` always matches the nearest :samp:`#ifdef` (or
+:samp:`#ifndef`, or :samp:`#if`).  Also, you cannot start a conditional
+group in one file and end it in another.
+
+Even if a conditional fails, the :samp:`{controlled text}` inside it is
+still run through initial transformations and tokenization.  Therefore,
+it must all be lexically valid C.  Normally the only way this matters is
+that all comments and string literals inside a failing conditional group
+must still be properly ended.
+
+The comment following the :samp:`#endif` is not required, but it is a
+good practice if there is a lot of :samp:`{controlled text}`, because it
+helps people match the :samp:`#endif` to the corresponding :samp:`#ifdef`.
+Older programs sometimes put :samp:`{MACRO}` directly after the
+:samp:`#endif` without enclosing it in a comment.  This is invalid code
+according to the C standard.  CPP accepts it with a warning.  It
+never affects which :samp:`#ifndef` the :samp:`#endif` matches.
+
+.. index:: #ifndef
+
+Sometimes you wish to use some code if a macro is *not* defined.
+You can do this by writing :samp:`#ifndef` instead of :samp:`#ifdef`.
+One common use of :samp:`#ifndef` is to include code only the first
+time a header file is included.  See :ref:`once-only-headers`.
+
+Macro definitions can vary between compilations for several reasons.
+Here are some samples.
+
+* Some macros are predefined on each kind of machine
+  (see :ref:`system-specific-predefined-macros`).  This allows you to provide
+  code specially tuned for a particular machine.
+
+* System header files define more macros, associated with the features
+  they implement.  You can test these macros with conditionals to avoid
+  using a system feature on a machine where it is not implemented.
+
+* Macros can be defined or undefined with the :option:`-D` and :option:`-U`
+  command-line options when you compile the program.  You can arrange to
+  compile the same source file into two different programs by choosing a
+  macro name to specify which program you want, writing conditionals to
+  test whether or how this macro is defined, and then controlling the
+  state of the macro with command-line options, perhaps set in the
+  Makefile.  See :ref:`invocation`.
+
+* Your program might have a special header file (often called
+  :samp:`config.h`) that is adjusted when the program is compiled.  It can
+  define or not define macros depending on the features of the system and
+  the desired capabilities of the program.  The adjustment can be
+  automated by a tool such as :command:`autoconf`, or done by hand.
+
+.. _if:
+
+If
+^^
+
+The :samp:`#if` directive allows you to test the value of an arithmetic
+expression, rather than the mere existence of one macro.  Its syntax is
+
+.. code-block:: c++
+
+  #if expression
+
+  controlled text
+
+  #endif /* expression */
+
+:samp:`{expression}` is a C expression of integer type, subject to stringent
+restrictions.  It may contain
+
+* Integer constants.
+
+* Character constants, which are interpreted as they would be in normal
+  code.
+
+* Arithmetic operators for addition, subtraction, multiplication,
+  division, bitwise operations, shifts, comparisons, and logical
+  operations (``&&`` and ``||``).  The latter two obey the usual
+  short-circuiting rules of standard C.
+
+* Macros.  All macros in the expression are expanded before actual
+  computation of the expression's value begins.
+
+* Uses of the ``defined`` operator, which lets you check whether macros
+  are defined in the middle of an :samp:`#if`.
+
+* Identifiers that are not macros, which are all considered to be the
+  number zero.  This allows you to write ``#if MACRO`` instead of
+  ``#ifdef MACRO``, if you know that MACRO, when defined, will
+  always have a nonzero value.  Function-like macros used without their
+  function call parentheses are also treated as zero.
+
+  In some contexts this shortcut is undesirable.  The :option:`-Wundef`
+  option causes GCC to warn whenever it encounters an identifier which is
+  not a macro in an :samp:`#if`.
+
+The preprocessor does not know anything about types in the language.
+Therefore, ``sizeof`` operators are not recognized in :samp:`#if`, and
+neither are ``enum`` constants.  They will be taken as identifiers
+which are not macros, and replaced by zero.  In the case of
+``sizeof``, this is likely to cause the expression to be invalid.
+
+The preprocessor calculates the value of :samp:`{expression}`.  It carries
+out all calculations in the widest integer type known to the compiler;
+on most machines supported by GCC this is 64 bits.  This is not the same
+rule as the compiler uses to calculate the value of a constant
+expression, and may give different results in some cases.  If the value
+comes out to be nonzero, the :samp:`#if` succeeds and the :samp:`{controlled
+text}` is included; otherwise it is skipped.
+
+.. index:: defined
+
+.. _defined:
+
+Defined
+^^^^^^^
+
+The special operator ``defined`` is used in :samp:`#if` and
+:samp:`#elif` expressions to test whether a certain name is defined as a
+macro.  ``defined name`` and ``defined (name)`` are
+both expressions whose value is 1 if :samp:`{name}` is defined as a macro at
+the current point in the program, and 0 otherwise.  Thus,  ``#if
+defined MACRO`` is precisely equivalent to ``#ifdef MACRO``.
+
+``defined`` is useful when you wish to test more than one macro for
+existence at once.  For example,
+
+.. code-block:: c++
+
+  #if defined (__vax__) || defined (__ns16000__)
+
+would succeed if either of the names ``__vax__`` or
+``__ns16000__`` is defined as a macro.
+
+Conditionals written like this:
+
+.. code-block:: c++
+
+  #if defined BUFSIZE && BUFSIZE >= 1024
+
+can generally be simplified to just ``#if BUFSIZE >= 1024``,
+since if ``BUFSIZE`` is not defined, it will be interpreted as having
+the value zero.
+
+If the ``defined`` operator appears as a result of a macro expansion,
+the C standard says the behavior is undefined.  GNU cpp treats it as a
+genuine ``defined`` operator and evaluates it normally.  It will warn
+wherever your code uses this feature if you use the command-line option
+:option:`-Wpedantic`, since other compilers may handle it differently.  The
+warning is also enabled by :option:`-Wextra`, and can also be enabled
+individually with :option:`-Wexpansion-to-defined`.
+
+.. index:: #else
+
+.. _else:
+
+Else
+^^^^
+
+The :samp:`#else` directive can be added to a conditional to provide
+alternative text to be used if the condition fails.  This is what it
+looks like:
+
+.. code-block:: c++
+
+  #if expression
+  text-if-true
+  #else /* Not expression */
+  text-if-false
+  #endif /* Not expression */
+
+If :samp:`{expression}` is nonzero, the :samp:`{text-if-true}` is included and
+the :samp:`{text-if-false}` is skipped.  If :samp:`{expression}` is zero, the
+opposite happens.
+
+You can use :samp:`#else` with :samp:`#ifdef` and :samp:`#ifndef`, too.
+
+.. index:: #elif
+
+.. _elif:
+
+Elif
+^^^^
+
+One common case of nested conditionals is used to check for more than two
+possible alternatives.  For example, you might have
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #else /* X != 1 */
+  #if X == 2
+  ...
+  #else /* X != 2 */
+  ...
+  #endif /* X != 2 */
+  #endif /* X != 1 */
+
+Another conditional directive, :samp:`#elif`, allows this to be
+abbreviated as follows:
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #elif X == 2
+  ...
+  #else /* X != 2 and X != 1*/
+  ...
+  #endif /* X != 2 and X != 1*/
+
+:samp:`#elif` stands for 'else if'.  Like :samp:`#else`, it goes in the
+middle of a conditional group and subdivides it; it does not require a
+matching :samp:`#endif` of its own.  Like :samp:`#if`, the :samp:`#elif`
+directive includes an expression to be tested.  The text following the
+:samp:`#elif` is processed only if the original :samp:`#if`-condition
+failed and the :samp:`#elif` condition succeeds.
+
+More than one :samp:`#elif` can go in the same conditional group.  Then
+the text after each :samp:`#elif` is processed only if the :samp:`#elif`
+condition succeeds after the original :samp:`#if` and all previous
+:samp:`#elif` directives within it have failed.
+
+:samp:`#else` is allowed after any number of :samp:`#elif` directives, but
+:samp:`#elif` may not follow :samp:`#else`.
+
+.. index:: __has_attribute
+
+__has_attribute
+^^^^^^^^^^^^^^^
+
+The special operator ``__has_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions to test whether the attribute
+referenced by its :samp:`{operand}` is recognized by GCC.  Using the operator
+in other contexts is not valid.  In C code, if compiling for strict
+conformance to standards before C2x, :samp:`{operand}` must be
+a valid identifier.  Otherwise, :samp:`{operand}` may be optionally
+introduced by the ``attribute-scope::`` prefix.
+The :samp:`{attribute-scope}` prefix identifies the 'namespace' within
+which the attribute is recognized.  The scope of GCC attributes is
+:samp:`gnu` or :samp:`__gnu__`.  The ``__has_attribute`` operator by
+itself, without any :samp:`{operand}` or parentheses, acts as a predefined
+macro so that support for it can be tested in portable code.  Thus,
+the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_attribute
+  #  if __has_attribute (nonnull)
+  #    define ATTR_NONNULL __attribute__ ((nonnull))
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_attribute`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression as
+shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_attribute && __has_attribute (nonnull)   /* not portable */
+  ...
+  #endif
+
+.. index:: __has_cpp_attribute
+
+__has_cpp_attribute
+^^^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_cpp_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions in C++ code to test whether
+the attribute referenced by its :samp:`{operand}` is recognized by GCC.
+``__has_cpp_attribute (operand)`` is equivalent to
+``__has_attribute (operand)`` except that when :samp:`{operand}`
+designates a supported standard attribute it evaluates to an integer
+constant of the form ``YYYYMM`` indicating the year and month when
+the attribute was first introduced into the C++ standard.  For additional
+information including the dates of the introduction of current standard
+attributes, see `SD-6: SG10 Feature Test Recommendations <https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations/>`_.
+
+.. index:: __has_c_attribute
+
+__has_c_attribute
+^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_c_attribute (operand)`` may be
+used in :samp:`#if` and :samp:`#elif` expressions in C code to test
+whether the attribute referenced by its :samp:`{operand}` is recognized by
+GCC in attributes using the :samp:`[[]]` syntax.  GNU attributes must
+be specified with the scope :samp:`gnu` or :samp:`__gnu__` with
+``__has_c_attribute``.  When :samp:`{operand}` designates a supported
+standard attribute it evaluates to an integer constant of the form
+``YYYYMM`` indicating the year and month when the attribute was
+first introduced into the C standard, or when the syntax of operands
+to the attribute was extended in the C standard.
+
+.. index:: __has_builtin
+
+__has_builtin
+^^^^^^^^^^^^^
+
+The special operator ``__has_builtin (operand)`` may be used in
+constant integer contexts and in preprocessor :samp:`#if` and :samp:`#elif`
+expressions to test whether the symbol named by its :samp:`{operand}` is
+recognized as a built-in function by GCC in the current language and
+conformance mode.  It evaluates to a constant integer with a nonzero
+value if the argument refers to such a function, and to zero otherwise.
+The operator may also be used in preprocessor :samp:`#if` and :samp:`#elif`
+expressions.  The ``__has_builtin`` operator by itself, without any
+:samp:`{operand}` or parentheses, acts as a predefined macro so that support
+for it can be tested in portable code.  Thus, the recommended use of
+the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_builtin
+  #  if __has_builtin (__builtin_object_size)
+  #    define builtin_object_size(ptr) __builtin_object_size (ptr, 2)
+  #  endif
+  #endif
+  #ifndef builtin_object_size
+  #  define builtin_object_size(ptr)   ((size_t)-1)
+  #endif
+
+.. index:: __has_include
+
+__has_include
+^^^^^^^^^^^^^
+
+The special operator ``__has_include (operand)`` may be used in
+:samp:`#if` and :samp:`#elif` expressions to test whether the header referenced
+by its :samp:`{operand}` can be included using the :samp:`#include` directive.  Using
+the operator in other contexts is not valid.  The :samp:`{operand}` takes
+the same form as the file in the :samp:`#include` directive (see :ref:`include-syntax`) and evaluates to a nonzero value if the header can be included and
+to zero otherwise.  Note that that the ability to include a header doesn't
+imply that the header doesn't contain invalid constructs or :samp:`#error`
+directives that would cause the preprocessor to fail.
+
+The ``__has_include`` operator by itself, without any :samp:`{operand}` or
+parentheses, acts as a predefined macro so that support for it can be tested
+in portable code.  Thus, the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_include
+  #  if __has_include (<stdatomic.h>)
+  #    include <stdatomic.h>
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_include`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression
+as shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_include && __has_include ("header.h")   /* not portable */
+  ...
+  #endif
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-uses.rst b/gcc/doc/cpp/conditional-uses.rst
new file mode 100644
index 00000000000..59555a5828d
--- /dev/null
+++ b/gcc/doc/cpp/conditional-uses.rst
@@ -0,0 +1,32 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _conditional-uses:
+
+Conditional Uses
+****************
+
+There are three general reasons to use a conditional.
+
+* A program may need to use different code depending on the machine or
+  operating system it is to run on.  In some cases the code for one
+  operating system may be erroneous on another operating system; for
+  example, it might refer to data types or constants that do not exist on
+  the other system.  When this happens, it is not enough to avoid
+  executing the invalid code.  Its mere presence will cause the compiler
+  to reject the program.  With a preprocessing conditional, the offending
+  code can be effectively excised from the program when it is not valid.
+
+* You may want to be able to compile the same source file into two
+  different programs.  One version might make frequent time-consuming
+  consistency checks on its intermediate data, or print the values of
+  those data for debugging, and the other not.
+
+* A conditional whose condition is always false is one way to exclude code
+  from the program but keep it as a sort of comment for future reference.
+
+Simple programs that do not need system-specific logic or complex
+debugging hooks generally will not need to use preprocessing
+conditionals.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditionals.rst b/gcc/doc/cpp/conditionals.rst
new file mode 100644
index 00000000000..381a6124da4
--- /dev/null
+++ b/gcc/doc/cpp/conditionals.rst
@@ -0,0 +1,44 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: conditionals
+
+.. _conditionals:
+
+Conditionals
+------------
+
+A :dfn:`conditional` is a directive that instructs the preprocessor to
+select whether or not to include a chunk of code in the final token
+stream passed to the compiler.  Preprocessor conditionals can test
+arithmetic expressions, or whether a name is defined as a macro, or both
+simultaneously using the special ``defined`` operator.
+
+A conditional in the C preprocessor resembles in some ways an ``if``
+statement in C, but it is important to understand the difference between
+them.  The condition in an ``if`` statement is tested during the
+execution of your program.  Its purpose is to allow your program to
+behave differently from run to run, depending on the data it is
+operating on.  The condition in a preprocessing conditional directive is
+tested when your program is compiled.  Its purpose is to allow different
+code to be included in the program depending on the situation at the
+time of compilation.
+
+However, the distinction is becoming less clear.  Modern compilers often
+do test ``if`` statements when a program is compiled, if their
+conditions are known not to vary at run time, and eliminate code which
+can never be executed.  If you can count on your compiler to do this,
+you may find that your program is more readable if you use ``if``
+statements with constant conditions (perhaps determined by macros).  Of
+course, you can only use this to exclude code, not type definitions or
+other preprocessing directives, and you can only do it if the code
+remains syntactically valid when it is not to be used.
+
+.. toctree::
+  :maxdepth: 2
+
+  conditional-uses
+  conditional-syntax
+  deleted-code
\ No newline at end of file
diff --git a/gcc/doc/cpp/conf.py b/gcc/doc/cpp/conf.py
new file mode 100644
index 00000000000..29d3aed4558
--- /dev/null
+++ b/gcc/doc/cpp/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'cpp'
+project = 'The C Preprocessor'
+copyright = '1987-2022 Free Software Foundation, Inc.'
+authors = 'Richard M. Stallman, Zachary Weinberg'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invocation', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/doc/cpp/copyright.rst b/gcc/doc/cpp/copyright.rst
new file mode 100644
index 00000000000..fa61190ddf7
--- /dev/null
+++ b/gcc/doc/cpp/copyright.rst
@@ -0,0 +1,24 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, the Front-Cover Texts being (a) (see below), and
+with the Back-Cover Texts being (b) (see below).
+A copy of the license is included in the :ref:`gnu_fdl`.
+
+(a) The FSF's Front-Cover Text is:
+
+     A GNU Manual
+
+(b) The FSF's Back-Cover Text is:
+
+     You have freedom to copy and modify this GNU Manual, like GNU
+     software.  Copies published by the Free Software Foundation raise
+     funds for GNU development.
\ No newline at end of file
diff --git a/gcc/doc/cpp/deleted-code.rst b/gcc/doc/cpp/deleted-code.rst
new file mode 100644
index 00000000000..758e0c1c0a3
--- /dev/null
+++ b/gcc/doc/cpp/deleted-code.rst
@@ -0,0 +1,34 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: commenting out code
+
+.. _deleted-code:
+
+Deleted Code
+************
+
+If you replace or delete a part of the program but want to keep the old
+code around for future reference, you often cannot simply comment it
+out.  Block comments do not nest, so the first comment inside the old
+code will end the commenting-out.  The probable result is a flood of
+syntax errors.
+
+One way to avoid this problem is to use an always-false conditional
+instead.  For instance, put ``#if 0`` before the deleted code and
+``#endif`` after it.  This works even if the code being turned
+off contains conditionals, but they must be entire conditionals
+(balanced :samp:`#if` and :samp:`#endif`).
+
+Some people use ``#ifdef notdef`` instead.  This is risky, because
+``notdef`` might be accidentally defined as a macro, and then the
+conditional would succeed.  ``#if 0`` can be counted on to fail.
+
+Do not use ``#if 0`` for comments which are not C code.  Use a real
+comment, instead.  The interior of ``#if 0`` must consist of complete
+tokens; in particular, single-quote characters must balance.  Comments
+often contain unbalanced single-quote characters (known in English as
+apostrophes).  These confuse ``#if 0``.  They don't confuse
+:samp:`/*`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/diagnostics.rst b/gcc/doc/cpp/diagnostics.rst
new file mode 100644
index 00000000000..beaad7d8217
--- /dev/null
+++ b/gcc/doc/cpp/diagnostics.rst
@@ -0,0 +1,51 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: diagnostic, reporting errors, reporting warnings, #error
+
+.. _diagnostics:
+
+Diagnostics
+-----------
+
+The directive :samp:`#error` causes the preprocessor to report a fatal
+error.  The tokens forming the rest of the line following :samp:`#error`
+are used as the error message.
+
+You would use :samp:`#error` inside of a conditional that detects a
+combination of parameters which you know the program does not properly
+support.  For example, if you know that the program will not run
+properly on a VAX, you might write
+
+.. code-block:: c++
+
+  #ifdef __vax__
+  #error "Won't work on VAXen.  See comments at get_last_object."
+  #endif
+
+If you have several configuration parameters that must be set up by
+the installation in a consistent way, you can use conditionals to detect
+an inconsistency and report it with :samp:`#error`.  For example,
+
+.. code-block:: c++
+
+  #if !defined(FOO) && defined(BAR)
+  #error "BAR requires FOO."
+  #endif
+
+.. index:: #warning
+
+The directive :samp:`#warning` is like :samp:`#error`, but causes the
+preprocessor to issue a warning and continue preprocessing.  The tokens
+following :samp:`#warning` are used as the warning message.
+
+You might use :samp:`#warning` in obsolete header files, with a message
+directing the user to the header file which should be used instead.
+
+Neither :samp:`#error` nor :samp:`#warning` macro-expands its argument.
+Internal whitespace sequences are each replaced with a single space.
+The line must consist of complete tokens.  It is wisest to make the
+argument of these directives be a single string constant; this avoids
+problems with apostrophes and the like.
\ No newline at end of file
diff --git a/gcc/doc/cpp/environment-variables.rst b/gcc/doc/cpp/environment-variables.rst
new file mode 100644
index 00000000000..c0ab7992905
--- /dev/null
+++ b/gcc/doc/cpp/environment-variables.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: environment variables
+
+.. _environment-variables:
+
+Environment Variables
+---------------------
+
+This section describes the environment variables that affect how CPP
+operates.  You can use them to specify directories or prefixes to use
+when searching for include files, or to control dependency output.
+
+Note that you can also specify places to search using options such as
+:option:`-I`, and control dependency output with options like
+:option:`-M` (see :ref:`invocation`).  These take precedence over
+environment variables, which in turn take precedence over the
+configuration of GCC.
+
+.. include:: ../../../doc/cppenv.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/gnu-free-documentation-license.rst b/gcc/doc/cpp/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/doc/cpp/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files.rst b/gcc/doc/cpp/header-files.rst
new file mode 100644
index 00000000000..13b9841c3c6
--- /dev/null
+++ b/gcc/doc/cpp/header-files.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: header file
+
+.. _header-files:
+
+Header Files
+------------
+
+A header file is a file containing C declarations and macro definitions
+(see :ref:`macros`) to be shared between several source files.  You request
+the use of a header file in your program by :dfn:`including` it, with the
+C preprocessing directive :samp:`#include`.
+
+Header files serve two purposes.
+
+.. index:: system header files
+
+* System header files declare the interfaces to parts of the operating
+  system.  You include them in your program to supply the definitions and
+  declarations you need to invoke system calls and libraries.
+
+* Your own header files contain declarations for interfaces between the
+  source files of your program.  Each time you have a group of related
+  declarations and macro definitions all or most of which are needed in
+  several different source files, it is a good idea to create a header
+  file for them.
+
+Including a header file produces the same results as copying the header
+file into each source file that needs it.  Such copying would be
+time-consuming and error-prone.  With a header file, the related
+declarations appear in only one place.  If they need to be changed, they
+can be changed in one place, and programs that include the header file
+will automatically use the new version when next recompiled.  The header
+file eliminates the labor of finding and changing all the copies as well
+as the risk that a failure to find one copy will result in
+inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with
+:samp:`.h`.  It is most portable to use only letters, digits, dashes, and
+underscores in header file names, and at most one dot.
+
+.. toctree::
+  :maxdepth: 2
+
+  header-files/include-syntax
+  header-files/include-operation
+  header-files/search-path
+  header-files/once-only-headers
+  header-files/alternatives-to-wrapper-ifndef
+  header-files/computed-includes
+  header-files/wrapper-headers
+  header-files/system-headers
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
new file mode 100644
index 00000000000..e38cffeaf38
--- /dev/null
+++ b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
@@ -0,0 +1,40 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _alternatives-to-wrapper-ifndef:
+
+Alternatives to Wrapper #ifndef
+*******************************
+
+CPP supports two more ways of indicating that a header file should be
+read only once.  Neither one is as portable as a wrapper :samp:`#ifndef`
+and we recommend you do not use them in new programs, with the caveat
+that :samp:`#import` is standard practice in Objective-C.
+
+.. index:: #import
+
+CPP supports a variant of :samp:`#include` called :samp:`#import` which
+includes a file, but does so at most once.  If you use :samp:`#import`
+instead of :samp:`#include`, then you don't need the conditionals
+inside the header file to prevent multiple inclusion of the contents.
+:samp:`#import` is standard in Objective-C, but is considered a
+deprecated extension in C and C++.
+
+:samp:`#import` is not a well designed feature.  It requires the users of
+a header file to know that it should only be included once.  It is much
+better for the header file's implementor to write the file so that users
+don't need to know this.  Using a wrapper :samp:`#ifndef` accomplishes
+this goal.
+
+In the present implementation, a single use of :samp:`#import` will
+prevent the file from ever being read again, by either :samp:`#import` or
+:samp:`#include`.  You should not rely on this; do not use both
+:samp:`#import` and :samp:`#include` to refer to the same header file.
+
+Another way to prevent a header file from being included more than once
+is with the :samp:`#pragma once` directive (see :ref:`pragmas`).
+:samp:`#pragma once` does not have the problems that :samp:`#import` does,
+but it is not recognized by all preprocessors, so you cannot rely on it
+in a portable program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/computed-includes.rst b/gcc/doc/cpp/header-files/computed-includes.rst
new file mode 100644
index 00000000000..49c16228032
--- /dev/null
+++ b/gcc/doc/cpp/header-files/computed-includes.rst
@@ -0,0 +1,86 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: computed includes, macros in include
+
+.. _computed-includes:
+
+Computed Includes
+*****************
+
+Sometimes it is necessary to select one of several different header
+files to be included into your program.  They might specify
+configuration parameters to be used on different sorts of operating
+systems, for instance.  You could do this with a series of conditionals,
+
+.. code-block:: c++
+
+  #if SYSTEM_1
+  # include "system_1.h"
+  #elif SYSTEM_2
+  # include "system_2.h"
+  #elif SYSTEM_3
+  ...
+  #endif
+
+That rapidly becomes tedious.  Instead, the preprocessor offers the
+ability to use a macro for the header name.  This is called a
+:dfn:`computed include`.  Instead of writing a header name as the direct
+argument of :samp:`#include`, you simply put a macro name there instead:
+
+.. code-block:: c++
+
+  #define SYSTEM_H "system_1.h"
+  ...
+  #include SYSTEM_H
+
+``SYSTEM_H`` will be expanded, and the preprocessor will look for
+:samp:`system_1.h` as if the :samp:`#include` had been written that way
+originally.  ``SYSTEM_H`` could be defined by your Makefile with a
+:option:`-D` option.
+
+You must be careful when you define the macro.  :samp:`#define` saves
+tokens, not text.  The preprocessor has no way of knowing that the macro
+will be used as the argument of :samp:`#include`, so it generates
+ordinary tokens, not a header name.  This is unlikely to cause problems
+if you use double-quote includes, which are close enough to string
+constants.  If you use angle brackets, however, you may have trouble.
+
+The syntax of a computed include is actually a bit more general than the
+above.  If the first non-whitespace character after :samp:`#include` is
+not :samp:`"` or :samp:`<`, then the entire line is macro-expanded
+like running text would be.
+
+If the line expands to a single string constant, the contents of that
+string constant are the file to be included.  CPP does not re-examine the
+string for embedded quotes, but neither does it process backslash
+escapes in the string.  Therefore
+
+.. code-block:: c++
+
+  #define HEADER "a\"b"
+  #include HEADER
+
+looks for a file named :samp:`a\\"b`.  CPP searches for the file according
+to the rules for double-quoted includes.
+
+If the line expands to a token stream beginning with a :samp:`<` token
+and including a :samp:`>` token, then the tokens between the :samp:`<` and
+the first :samp:`>` are combined to form the filename to be included.
+Any whitespace between tokens is reduced to a single space; then any
+space after the initial :samp:`<` is retained, but a trailing space
+before the closing :samp:`>` is ignored.  CPP searches for the file
+according to the rules for angle-bracket includes.
+
+In either case, if there are any tokens on the line after the file name,
+an error occurs and the directive is not processed.  It is also an error
+if the result of expansion does not match either of the two expected
+forms.
+
+These rules are implementation-defined behavior according to the C
+standard.  To minimize the risk of different compilers interpreting your
+computed includes differently, we recommend you use only a single
+object-like macro which expands to a string constant.  This will also
+minimize confusion for people reading your program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-operation.rst b/gcc/doc/cpp/header-files/include-operation.rst
new file mode 100644
index 00000000000..465905698e7
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-operation.rst
@@ -0,0 +1,67 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _include-operation:
+
+Include Operation
+*****************
+
+The :samp:`#include` directive works by directing the C preprocessor to
+scan the specified file as input before continuing with the rest of the
+current file.  The output from the preprocessor contains the output
+already generated, followed by the output resulting from the included
+file, followed by the output that comes from the text after the
+:samp:`#include` directive.  For example, if you have a header file
+:samp:`header.h` as follows,
+
+.. code-block:: c++
+
+  char *test (void);
+
+and a main program called :samp:`program.c` that uses the header file,
+like this,
+
+.. code-block:: c++
+
+  int x;
+  #include "header.h"
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+the compiler will see the same token stream as it would if
+:samp:`program.c` read
+
+.. code-block:: c++
+
+  int x;
+  char *test (void);
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+Included files are not limited to declarations and macro definitions;
+those are merely the typical uses.  Any fragment of a C program can be
+included from another file.  The include file could even contain the
+beginning of a statement that is concluded in the containing file, or
+the end of a statement that was started in the including file.  However,
+an included file must consist of complete tokens.  Comments and string
+literals which have not been closed by the end of an included file are
+invalid.  For error recovery, they are considered to end at the end of
+the file.
+
+To avoid confusion, it is best if header files contain only complete
+syntactic units---function declarations or definitions, type
+declarations, etc.
+
+The line following the :samp:`#include` directive is always treated as a
+separate line by the C preprocessor, even if the included file lacks a
+final newline.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-syntax.rst b/gcc/doc/cpp/header-files/include-syntax.rst
new file mode 100644
index 00000000000..a378dfc5375
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-syntax.rst
@@ -0,0 +1,42 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #include
+
+.. _include-syntax:
+
+Include Syntax
+**************
+
+Both user and system header files are included using the preprocessing
+directive :samp:`#include`.  It has two variants:
+
+:samp:`#include <{file}>`
+  This variant is used for system header files.  It searches for a file
+  named :samp:`{file}` in a standard list of system directories.  You can prepend
+  directories to this list with the :option:`-I` option (see :ref:`invocation`).
+
+:samp:`#include "{file}"`
+  This variant is used for header files of your own program.  It
+  searches for a file named :samp:`{file}` first in the directory containing
+  the current file, then in the quote directories and then the same
+  directories used for ``<file>``.  You can prepend directories
+  to the list of quote directories with the :option:`-iquote` option.
+
+The argument of :samp:`#include`, whether delimited with quote marks or
+angle brackets, behaves like a string constant in that comments are not
+recognized, and macro names are not expanded.  Thus, ``#include
+<x/*y>`` specifies inclusion of a system header file named :samp:`x/*y`.
+
+However, if backslashes occur within :samp:`{file}`, they are considered
+ordinary text characters, not escape characters.  None of the character
+escape sequences appropriate to string constants in C are processed.
+Thus, ``#include "x\n\\y"`` specifies a filename containing three
+backslashes.  (Some systems interpret :samp:`\\` as a pathname separator.
+All of these also interpret :samp:`/` the same way.  It is most portable
+to use only :samp:`/`.)
+
+It is an error if there is anything (other than comments) on the line
+after the file name.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/once-only-headers.rst b/gcc/doc/cpp/header-files/once-only-headers.rst
new file mode 100644
index 00000000000..2ee77771620
--- /dev/null
+++ b/gcc/doc/cpp/header-files/once-only-headers.rst
@@ -0,0 +1,52 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: repeated inclusion, including just once, wrapper #ifndef
+
+.. _once-only-headers:
+
+Once-Only Headers
+*****************
+
+If a header file happens to be included twice, the compiler will process
+its contents twice.  This is very likely to cause an error, e.g. when the
+compiler sees the same structure definition twice.  Even if it does not,
+it will certainly waste time.
+
+The standard way to prevent this is to enclose the entire real contents
+of the file in a conditional, like this:
+
+.. code-block:: c++
+
+  /* File foo.  */
+  #ifndef FILE_FOO_SEEN
+  #define FILE_FOO_SEEN
+
+  the entire file
+
+  #endif /* !FILE_FOO_SEEN */
+
+This construct is commonly known as a :dfn:`wrapper #ifndef`.
+When the header is included again, the conditional will be false,
+because ``FILE_FOO_SEEN`` is defined.  The preprocessor will skip
+over the entire contents of the file, and the compiler will not see it
+twice.
+
+CPP optimizes even further.  It remembers when a header file has a
+wrapper :samp:`#ifndef`.  If a subsequent :samp:`#include` specifies that
+header, and the macro in the :samp:`#ifndef` is still defined, it does
+not bother to rescan the file at all.
+
+You can put comments outside the wrapper.  They will not interfere with
+this optimization.
+
+.. index:: controlling macro, guard macro
+
+The macro ``FILE_FOO_SEEN`` is called the :dfn:`controlling macro` or
+:dfn:`guard macro`.  In a user header file, the macro name should not
+begin with :samp:`_`.  In a system header file, it should begin with
+:samp:`__` to avoid conflicts with user programs.  In any kind of header
+file, the macro name should contain the name of the file and some
+additional text, to avoid conflicts with other header files.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/search-path.rst b/gcc/doc/cpp/header-files/search-path.rst
new file mode 100644
index 00000000000..9f87878517f
--- /dev/null
+++ b/gcc/doc/cpp/header-files/search-path.rst
@@ -0,0 +1,53 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _search-path:
+
+Search Path
+***********
+
+By default, the preprocessor looks for header files included by the quote
+form of the directive ``#include "file"`` first relative to
+the directory of the current file, and then in a preconfigured list
+of standard system directories.
+For example, if :samp:`/usr/include/sys/stat.h` contains
+``#include "types.h"``, GCC looks for :samp:`types.h` first in
+:samp:`/usr/include/sys`, then in its usual search path.
+
+For the angle-bracket form ``#include <file>``, the
+preprocessor's default behavior is to look only in the standard system
+directories.  The exact search directory list depends on the target
+system, how GCC is configured, and where it is installed.  You can
+find the default search directory list for your version of CPP by
+invoking it with the :option:`-v` option.  For example,
+
+.. code-block:: c++
+
+  cpp -v /dev/null -o /dev/null
+
+There are a number of command-line options you can use to add
+additional directories to the search path.
+The most commonly-used option is :option:`-Idir`, which causes
+:samp:`{dir}` to be searched after the current directory (for the quote
+form of the directive) and ahead of the standard system directories.
+You can specify multiple :option:`-I` options on the command line,
+in which case the directories are searched in left-to-right order.
+
+If you need separate control over the search paths for the quote and
+angle-bracket forms of the :samp:`#include` directive, you can use the
+:option:`-iquote` and/or :option:`-isystem` options instead of :option:`-I`.
+See :ref:`invocation`, for a detailed description of these options, as
+well as others that are less generally useful.
+
+If you specify other options on the command line, such as :option:`-I`,
+that affect where the preprocessor searches for header files, the
+directory list printed by the :option:`-v` option reflects the actual
+search path used by the preprocessor.
+
+Note that you can also prevent the preprocessor from searching any of
+the default system header directories with the :option:`-nostdinc`
+option.  This is useful when you are compiling an operating system
+kernel or some other program that does not use the standard C library
+facilities, or the standard C library itself.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/system-headers.rst b/gcc/doc/cpp/header-files/system-headers.rst
new file mode 100644
index 00000000000..ef6474f9dea
--- /dev/null
+++ b/gcc/doc/cpp/header-files/system-headers.rst
@@ -0,0 +1,41 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: system header files
+
+.. _system-headers:
+
+System Headers
+**************
+
+The header files declaring interfaces to the operating system and
+runtime libraries often cannot be written in strictly conforming C.
+Therefore, GCC gives code found in :dfn:`system headers` special
+treatment.  All warnings, other than those generated by :samp:`#warning`
+(see :ref:`diagnostics`), are suppressed while GCC is processing a system
+header.  Macros defined in a system header are immune to a few warnings
+wherever they are expanded.  This immunity is granted on an ad-hoc
+basis, when we find that a warning generates lots of false positives
+because of code in macros defined in system headers.
+
+Normally, only the headers found in specific directories are considered
+system headers.  These directories are determined when GCC is compiled.
+There are, however, two ways to make normal headers into system headers:
+
+* Header files found in directories added to the search path with the
+  :option:`-isystem` and :option:`-idirafter` command-line options are
+  treated as system headers for the purposes of diagnostics.
+
+*
+  .. index:: #pragma GCC system_header
+
+  There is also a directive, ``#pragma GCC system_header``, which
+  tells GCC to consider the rest of the current include file a system
+  header, no matter where it was found.  Code that comes before the
+  :samp:`#pragma` in the file is not affected.  ``#pragma GCC
+  system_header`` has no effect in the primary source file.
+
+On some targets, such as RS/6000 AIX, GCC implicitly surrounds all
+system headers with an :samp:`extern "C"` block when compiling as C++.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/wrapper-headers.rst b/gcc/doc/cpp/header-files/wrapper-headers.rst
new file mode 100644
index 00000000000..848170e138e
--- /dev/null
+++ b/gcc/doc/cpp/header-files/wrapper-headers.rst
@@ -0,0 +1,58 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: wrapper headers, overriding a header file, #include_next
+
+.. _wrapper-headers:
+
+Wrapper Headers
+***************
+
+Sometimes it is necessary to adjust the contents of a system-provided
+header file without editing it directly.  GCC's :command:`fixincludes`
+operation does this, for example.  One way to do that would be to create
+a new header file with the same name and insert it in the search path
+before the original header.  That works fine as long as you're willing
+to replace the old header entirely.  But what if you want to refer to
+the old header from the new one?
+
+You cannot simply include the old header with :samp:`#include`.  That
+will start from the beginning, and find your new header again.  If your
+header is not protected from multiple inclusion (see :ref:`once-only-headers`), it will recurse infinitely and cause a fatal error.
+
+You could include the old header with an absolute pathname:
+
+.. code-block:: c++
+
+  #include "/usr/include/old-header.h"
+
+This works, but is not clean; should the system headers ever move, you
+would have to edit the new headers to match.
+
+There is no way to solve this problem within the C standard, but you can
+use the GNU extension :samp:`#include_next`.  It means, 'Include the
+*next* file with this name'.  This directive works like
+:samp:`#include` except in searching for the specified file: it starts
+searching the list of header file directories *after* the directory
+in which the current file was found.
+
+Suppose you specify :option:`-I /usr/local/include`, and the list of
+directories to search also includes :samp:`/usr/include`; and suppose
+both directories contain :samp:`signal.h`.  Ordinary ``#include
+<signal.h>`` finds the file under :samp:`/usr/local/include`.  If that
+file contains ``#include_next <signal.h>``, it starts searching
+after that directory, and finds the file in :samp:`/usr/include`.
+
+:samp:`#include_next` does not distinguish between ``<file>``
+and ``"file"`` inclusion, nor does it check that the file you
+specify has the same name as the current file.  It simply looks for the
+file named, starting with the directory in the search path after the one
+where the current file was found.
+
+The use of :samp:`#include_next` can lead to great confusion.  We
+recommend it be used only when there is no other alternative.  In
+particular, it should not be used in the headers belonging to a specific
+program; it should be used only to make global corrections along the
+lines of :command:`fixincludes`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-defined-behavior.rst b/gcc/doc/cpp/implementation-defined-behavior.rst
new file mode 100644
index 00000000000..8946520eefe
--- /dev/null
+++ b/gcc/doc/cpp/implementation-defined-behavior.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-defined-behavior:
+
+.. _identifier-characters:
+
+Implementation-defined behavior
+*******************************
+
+This is how CPP behaves in all the cases which the C standard
+describes as :dfn:`implementation-defined`.  This term means that the
+implementation is free to do what it likes, but must document its choice
+and stick to it.
+
+.. todo:: Check the C++ standard for more implementation-defined stuff.
+
+* The mapping of physical source file multi-byte characters to the
+  execution character set.
+
+  The input character set can be specified using the
+  :option:`-finput-charset` option, while the execution character set may
+  be controlled using the :option:`-fexec-charset` and
+  :option:`-fwide-exec-charset` options.
+
+* Identifier characters.
+
+  The C and C++ standards allow identifiers to be composed of :samp:`_`
+  and the alphanumeric characters.  C++ also allows universal character
+  names.  C99 and later C standards permit both universal character
+  names and implementation-defined characters.  In both C and C++ modes,
+  GCC accepts in identifiers exactly those extended characters that
+  correspond to universal character names permitted by the chosen
+  standard.
+
+  GCC allows the :samp:`$` character in identifiers as an extension for
+  most targets.  This is true regardless of the std= switch,
+  since this extension cannot conflict with standards-conforming
+  programs.  When preprocessing assembler, however, dollars are not
+  identifier characters by default.
+
+  Currently the targets that by default do not permit :samp:`$` are AVR,
+  IP2K, MMIX, MIPS Irix 3, ARM aout, and PowerPC targets for the AIX
+  operating system.
+
+  You can override the default with :option:`-fdollars-in-identifiers` or
+  :option:`-fno-dollars-in-identifiers`.  See :option:`-fdollars-in-identifiers`.
+
+* Non-empty sequences of whitespace characters.
+
+  In textual output, each whitespace sequence is collapsed to a single
+  space.  For aesthetic reasons, the first token on each non-directive
+  line of output is preceded with sufficient spaces that it appears in the
+  same column as it did in the original source file.
+
+* The numeric value of character constants in preprocessor expressions.
+
+  The preprocessor and compiler interpret character constants in the
+  same way; i.e. escape sequences such as :samp:`\\a` are given the
+  values they would have on the target machine.
+
+  The compiler evaluates a multi-character character constant a character
+  at a time, shifting the previous value left by the number of bits per
+  target character, and then or-ing in the bit-pattern of the new
+  character truncated to the width of a target character.  The final
+  bit-pattern is given type ``int``, and is therefore signed,
+  regardless of whether single characters are signed or not.
+  If there are more
+  characters in the constant than would fit in the target ``int`` the
+  compiler issues a warning, and the excess leading characters are
+  ignored.
+
+  For example, ``'ab'`` for a target with an 8-bit ``char`` would be
+  interpreted as :samp:`(int) ((unsigned char) 'a' * 256 + (unsigned char)
+  'b')`, and ``'\234a'`` as :samp:`(int) ((unsigned char) '\\234' *
+  256 + (unsigned char) 'a')`.
+
+* Source file inclusion.
+
+  For a discussion on how the preprocessor locates header files,
+  :ref:`include-operation`.
+
+* Interpretation of the filename resulting from a macro-expanded
+  :samp:`#include` directive.
+
+  See :ref:`computed-includes`.
+
+* Treatment of a :samp:`#pragma` directive that after macro-expansion
+  results in a standard pragma.
+
+  No macro expansion occurs on any :samp:`#pragma` directive line, so the
+  question does not arise.
+
+  Note that GCC does not yet implement any of the standard
+  pragmas.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-details.rst b/gcc/doc/cpp/implementation-details.rst
new file mode 100644
index 00000000000..326277b1fc9
--- /dev/null
+++ b/gcc/doc/cpp/implementation-details.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-details:
+
+Implementation Details
+----------------------
+
+Here we document details of how the preprocessor's implementation
+affects its user-visible behavior.  You should try to avoid undue
+reliance on behavior described here, as it is possible that it will
+change subtly in future implementations.
+
+Also documented here are obsolete features still supported by CPP.
+
+.. toctree::
+  :maxdepth: 2
+
+  implementation-defined-behavior
+  implementation-limits
+  obsolete-features
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-limits.rst b/gcc/doc/cpp/implementation-limits.rst
new file mode 100644
index 00000000000..18cfc6ab0a6
--- /dev/null
+++ b/gcc/doc/cpp/implementation-limits.rst
@@ -0,0 +1,68 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: implementation limits
+
+.. _implementation-limits:
+
+Implementation limits
+*********************
+
+CPP has a small number of internal limits.  This section lists the
+limits which the C standard requires to be no lower than some minimum,
+and all the others known.  It is intended that there should be as few limits
+as possible.  If you encounter an undocumented or inconvenient limit,
+please report that as a bug.  See :ref:`gcc:bugs`.
+
+Where we say something is limited :dfn:`only by available memory`, that
+means that internal data structures impose no intrinsic limit, and space
+is allocated with ``malloc`` or equivalent.  The actual limit will
+therefore depend on many things, such as the size of other things
+allocated by the compiler at the same time, the amount of memory
+consumed by other processes on the same computer, etc.
+
+* Nesting levels of :samp:`#include` files.
+
+  We impose an arbitrary limit of 200 levels, to avoid runaway recursion.
+  The standard requires at least 15 levels.
+
+* Nesting levels of conditional inclusion.
+
+  The C standard mandates this be at least 63.  CPP is limited only by
+  available memory.
+
+* Levels of parenthesized expressions within a full expression.
+
+  The C standard requires this to be at least 63.  In preprocessor
+  conditional expressions, it is limited only by available memory.
+
+* Significant initial characters in an identifier or macro name.
+
+  The preprocessor treats all characters as significant.  The C standard
+  requires only that the first 63 be significant.
+
+* Number of macros simultaneously defined in a single translation unit.
+
+  The standard requires at least 4095 be possible.  CPP is limited only
+  by available memory.
+
+* Number of parameters in a macro definition and arguments in a macro call.
+
+  We allow ``USHRT_MAX``, which is no smaller than 65,535.  The minimum
+  required by the standard is 127.
+
+* Number of characters on a logical source line.
+
+  The C standard requires a minimum of 4096 be permitted.  CPP places
+  no limits on this, but you may get incorrect column numbers reported in
+  diagnostics for lines longer than 65,535 characters.
+
+* Maximum size of a source file.
+
+  The standard does not specify any lower limit on the maximum size of a
+  source file.  GNU cpp maps files into memory, so it is limited by the
+  available address space.  This is generally at least two gigabytes.
+  Depending on the operating system, the size of physical memory may or
+  may not be a limitation.
\ No newline at end of file
diff --git a/gcc/doc/cpp/index.rst b/gcc/doc/cpp/index.rst
new file mode 100644
index 00000000000..e19dfba42a6
--- /dev/null
+++ b/gcc/doc/cpp/index.rst
@@ -0,0 +1,35 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The C Preprocessor
+==================
+
+The C preprocessor implements the macro language used to transform C,
+C++, and Objective-C programs before they are compiled.  It can also be
+useful on its own.
+
+.. only:: html
+
+  Contents:
+
+.. toctree::
+
+  copyright
+  overview
+  header-files
+  macros
+  conditionals
+  diagnostics
+  line-control
+  pragmas
+  other-directives
+  preprocessor-output
+  traditional-mode
+  implementation-details
+  invocation
+  environment-variables
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/doc/cpp/indices-and-tables.rst b/gcc/doc/cpp/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/doc/cpp/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/initial-processing.rst b/gcc/doc/cpp/initial-processing.rst
new file mode 100644
index 00000000000..9ca96f21428
--- /dev/null
+++ b/gcc/doc/cpp/initial-processing.rst
@@ -0,0 +1,164 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _initial-processing:
+
+Initial processing
+******************
+
+The preprocessor performs a series of textual transformations on its
+input.  These happen before all other processing.  Conceptually, they
+happen in a rigid order, and the entire file is run through each
+transformation before the next one begins.  CPP actually does them
+all at once, for performance reasons.  These transformations correspond
+roughly to the first three 'phases of translation' described in the C
+standard.
+
+.. index:: line endings
+
+* The input file is read into memory and broken into lines.
+
+  Different systems use different conventions to indicate the end of a
+  line.  GCC accepts the ASCII control sequences LF, CR
+  LF and CR as end-of-line markers.  These are the canonical
+  sequences used by Unix, DOS and VMS, and the classic Mac OS (before
+  OSX) respectively.  You may therefore safely copy source code written
+  on any of those systems to a different one and use it without
+  conversion.  (GCC may lose track of the current line number if a file
+  doesn't consistently use one convention, as sometimes happens when it
+  is edited on computers with different conventions that share a network
+  file system.)
+
+  If the last line of any input file lacks an end-of-line marker, the end
+  of the file is considered to implicitly supply one.  The C standard says
+  that this condition provokes undefined behavior, so GCC will emit a
+  warning message.
+
+.. index:: trigraphs
+
+.. _trigraphs:
+
+* If trigraphs are enabled, they are replaced by their
+  corresponding single characters.  By default GCC ignores trigraphs,
+  but if you request a strictly conforming mode with the :option:`-std`
+  option, or you specify the :option:`-trigraphs` option, then it
+  converts them.
+
+  These are nine three-character sequences, all starting with :samp:`??`,
+  that are defined by ISO C to stand for single characters.  They permit
+  obsolete systems that lack some of C's punctuation to use C.  For
+  example, :samp:`??/` stands for :samp:`\\`, so ``'??/n'`` is a character
+  constant for a newline.
+
+  Trigraphs are not popular and many compilers implement them
+  incorrectly.  Portable code should not rely on trigraphs being either
+  converted or ignored.  With :option:`-Wtrigraphs` GCC will warn you
+  when a trigraph may change the meaning of your program if it were
+  converted.  See :ref:`wtrigraphs`.
+
+  In a string constant, you can prevent a sequence of question marks
+  from being confused with a trigraph by inserting a backslash between
+  the question marks, or by separating the string literal at the
+  trigraph and making use of string literal concatenation.  ``"(??\?)"``
+  is the string :samp:`(???)`, not :samp:`(?]`.  Traditional C compilers
+  do not recognize these idioms.
+
+  The nine trigraphs and their replacements are
+
+  .. code-block::
+
+    Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+    Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+.. index:: continued lines, backslash-newline
+
+* Continued lines are merged into one long line.
+
+  A continued line is a line which ends with a backslash, :samp:`\\`.  The
+  backslash is removed and the following line is joined with the current
+  one.  No space is inserted, so you may split a line anywhere, even in
+  the middle of a word.  (It is generally more readable to split lines
+  only at white space.)
+
+  The trailing backslash on a continued line is commonly referred to as a
+  :dfn:`backslash-newline`.
+
+  If there is white space between a backslash and the end of a line, that
+  is still a continued line.  However, as this is usually the result of an
+  editing mistake, and many compilers will not accept it as a continued
+  line, GCC will warn you about it.
+
+.. index:: comments, line comments, block comments
+
+* All comments are replaced with single spaces.
+
+  There are two kinds of comments.  :dfn:`Block comments` begin with
+  :samp:`/*` and continue until the next :samp:`*/`.  Block comments do not
+  nest:
+
+  .. code-block:: c++
+
+    /* this is /* one comment */ text outside comment
+
+  :dfn:`Line comments` begin with :samp:`//` and continue to the end of the
+  current line.  Line comments do not nest either, but it does not matter,
+  because they would end in the same place anyway.
+
+  .. code-block:: c++
+
+    // this is // one comment
+    text outside comment
+
+It is safe to put line comments inside block comments, or vice versa.
+
+.. code-block:: c++
+
+  /* block comment
+     // contains line comment
+     yet more comment
+   */ outside comment
+
+  // line comment /* contains block comment */
+
+But beware of commenting out one end of a block comment with a line
+comment.
+
+.. code-block::
+
+   // l.c.  /* block comment begins
+      oops! this isn't a comment anymore */
+
+Comments are not recognized within string literals.
+``"/* blah */"`` is the string constant :samp:`/\* blah \*/`, not
+an empty string.
+
+Line comments are not in the 1989 edition of the C standard, but they
+are recognized by GCC as an extension.  In C++ and in the 1999 edition
+of the C standard, they are an official part of the language.
+
+Since these transformations happen before all other processing, you can
+split a line mechanically with backslash-newline anywhere.  You can
+comment out the end of a line.  You can continue a line comment onto the
+next line with backslash-newline.  You can even split :samp:`/*`,
+:samp:`*/`, and :samp:`//` onto multiple lines with backslash-newline.
+For example:
+
+.. code-block::
+
+  /\
+  *
+  */ # /*
+  */ defi\
+  ne FO\
+  O 10\
+  20
+
+is equivalent to ``#define FOO 1020``.  All these tricks are
+extremely confusing and should not be used in code intended to be
+readable.
+
+There is no way to prevent a backslash at the end of a line from being
+interpreted as a backslash-newline.  This cannot affect any correct
+program, however.
\ No newline at end of file
diff --git a/gcc/doc/cpp/invocation.rst b/gcc/doc/cpp/invocation.rst
new file mode 100644
index 00000000000..7b13980af5a
--- /dev/null
+++ b/gcc/doc/cpp/invocation.rst
@@ -0,0 +1,81 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: invocation, command line
+
+.. _invocation:
+
+Invocation
+----------
+
+Most often when you use the C preprocessor you do not have to invoke it
+explicitly: the C compiler does so automatically.  However, the
+preprocessor is sometimes useful on its own.  You can invoke the
+preprocessor either with the :command:`cpp` command, or via :command:`gcc -E`.
+In GCC, the preprocessor is actually integrated with the compiler
+rather than a separate program, and both of these commands invoke
+GCC and tell it to stop after the preprocessing phase.
+
+The :command:`cpp` options listed here are also accepted by
+:command:`gcc` and have the same meaning.  Likewise the :command:`cpp`
+command accepts all the usual :command:`gcc` driver options, although those
+pertaining to compilation phases after preprocessing are ignored.
+
+Only options specific to preprocessing behavior are documented here.
+Refer to the GCC manual for full documentation of other driver options.
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  cpp [ :option:`-D`:samp:`{macro}` [= :samp:`{defn}` ]...] [ :option:`-U`:samp:`{macro}` ]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-iquote`:samp:`{dir}`...]
+      [ :option:`-M` | :option:`-MM` ] [ :option:`-MG` ] [ :option:`-MF` :samp:`{filename}` ]
+      [ :option:`-MP` ] [ :option:`-MQ` :samp:`{target}`...]
+      [ :option:`-MT` :samp:`{target}`...]
+      :samp:`{infile}` [[ :option:`-o` ] :samp:`{outfile}` ]
+
+  Only the most useful options are given above; see below for a more
+  complete list of preprocessor-specific options.
+  In addition, :command:`cpp` accepts most :command:`gcc` driver options, which
+  are not listed here.  Refer to the GCC documentation for details.
+
+Options
+^^^^^^^
+
+The :command:`cpp` command expects two file names as arguments, :samp:`{infile}` and
+:samp:`{outfile}`.  The preprocessor reads :samp:`{infile}` together with any
+other files it specifies with :samp:`#include`.  All the output generated
+by the combined input files is written in :samp:`{outfile}`.
+
+Either :samp:`{infile}` or :samp:`{outfile}` may be :option:`-`, which as
+:samp:`{infile}` means to read from standard input and as :samp:`{outfile}`
+means to write to standard output.  If either file is omitted, it
+means the same as if :option:`-` had been specified for that file.
+You can also use the :option:`-o outfile` option to specify the
+output file.
+
+Unless otherwise noted, or the option ends in :samp:`=`, all options
+which take an argument may have that argument appear either immediately
+after the option, or with a space between option and argument:
+:option:`-Ifoo` and :option:`-I foo` have the same effect.
+
+.. index:: grouping options, options, grouping
+
+Many options have multi-letter names; therefore multiple single-letter
+options may *not* be grouped: :option:`-dM` is very different from
+:samp:`-d -M`.
+
+.. index:: options
+
+.. include:: ../../../doc/cppopts.rst
+
+
+.. include:: ../../../doc/cppdiropts.rst
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/line-control.rst b/gcc/doc/cpp/line-control.rst
new file mode 100644
index 00000000000..933d8a9cf1c
--- /dev/null
+++ b/gcc/doc/cpp/line-control.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: line control
+
+.. _line-control:
+
+Line Control
+------------
+
+The C preprocessor informs the C compiler of the location in your source
+code where each token came from.  Presently, this is just the file name
+and line number.  All the tokens resulting from macro expansion are
+reported as having appeared on the line of the source file where the
+outermost macro was used.  We intend to be more accurate in the future.
+
+If you write a program which generates source code, such as the
+:command:`bison` parser generator, you may want to adjust the preprocessor's
+notion of the current file name and line number by hand.  Parts of the
+output from :command:`bison` are generated from scratch, other parts come
+from a standard parser file.  The rest are copied verbatim from
+:command:`bison`'s input.  You would like compiler error messages and
+symbolic debuggers to be able to refer to ``bison`` 's input file.
+
+.. index:: #line
+
+:command:`bison` or any such program can arrange this by writing
+:samp:`#line` directives into the output file.  :samp:`#line` is a
+directive that specifies the original line number and source file name
+for subsequent input in the current preprocessor input file.
+:samp:`#line` has three variants:
+
+:samp:`#line {linenum}`
+  :samp:`{linenum}` is a non-negative decimal integer constant.  It specifies
+  the line number which should be reported for the following line of
+  input.  Subsequent lines are counted from :samp:`{linenum}`.
+
+:samp:`#line {linenum}{filename}`
+  :samp:`{linenum}` is the same as for the first form, and has the same
+  effect.  In addition, :samp:`{filename}` is a string constant.  The
+  following line and all subsequent lines are reported to come from the
+  file it specifies, until something else happens to change that.
+  :samp:`{filename}` is interpreted according to the normal rules for a string
+  constant: backslash escapes are interpreted.  This is different from
+  :samp:`#include`.
+
+:samp:`#line {anything else}`
+  :samp:`{anything else}` is checked for macro calls, which are expanded.
+  The result should match one of the above two forms.
+
+:samp:`#line` directives alter the results of the ``__FILE__`` and
+``__LINE__`` predefined macros from that point on.  See :ref:`standard-predefined-macros`.  They do not have any effect on :samp:`#include`'s
+idea of the directory containing the current file.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros.rst b/gcc/doc/cpp/macros.rst
new file mode 100644
index 00000000000..7355e0719ef
--- /dev/null
+++ b/gcc/doc/cpp/macros.rst
@@ -0,0 +1,37 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _macros:
+
+Macros
+------
+
+A :dfn:`macro` is a fragment of code which has been given a name.
+Whenever the name is used, it is replaced by the contents of the macro.
+There are two kinds of macros.  They differ mostly in what they look
+like when they are used.  :dfn:`Object-like` macros resemble data objects
+when used, :dfn:`function-like` macros resemble function calls.
+
+You may define any valid identifier as a macro, even if it is a C
+keyword.  The preprocessor does not know anything about keywords.  This
+can be useful if you wish to hide a keyword such as ``const`` from an
+older compiler that does not understand it.  However, the preprocessor
+operator ``defined`` (see :ref:`defined`) can never be defined as a
+macro, and C++'s named operators (see :ref:`c++-named-operators`) cannot be
+macros when you are compiling C++.
+
+.. toctree::
+  :maxdepth: 2
+
+  macros/object-like-macros
+  macros/function-like-macros
+  macros/macro-arguments
+  macros/stringizing
+  macros/concatenation
+  macros/variadic-macros
+  macros/predefined-macros
+  macros/undefining-and-redefining-macros
+  macros/directives-within-macro-arguments
+  macros/macro-pitfalls
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/concatenation.rst b/gcc/doc/cpp/macros/concatenation.rst
new file mode 100644
index 00000000000..2f5066ab65e
--- /dev/null
+++ b/gcc/doc/cpp/macros/concatenation.rst
@@ -0,0 +1,85 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: concatenation, token pasting, token concatenation, ## operator
+
+.. _concatenation:
+
+Concatenation
+*************
+
+It is often useful to merge two tokens into one while expanding macros.
+This is called :dfn:`token pasting` or :dfn:`token concatenation`.  The
+:samp:`##` preprocessing operator performs token pasting.  When a macro
+is expanded, the two tokens on either side of each :samp:`##` operator
+are combined into a single token, which then replaces the :samp:`##` and
+the two original tokens in the macro expansion.  Usually both will be
+identifiers, or one will be an identifier and the other a preprocessing
+number.  When pasted, they make a longer identifier.  This isn't the
+only valid case.  It is also possible to concatenate two numbers (or a
+number and a name, such as ``1.5`` and ``e3``) into a number.
+Also, multi-character operators such as ``+=`` can be formed by
+token pasting.
+
+However, two tokens that don't together form a valid token cannot be
+pasted together.  For example, you cannot concatenate ``x`` with
+``+`` in either order.  If you try, the preprocessor issues a warning
+and emits the two tokens.  Whether it puts white space between the
+tokens is undefined.  It is common to find unnecessary uses of :samp:`##`
+in complex macros.  If you get this warning, it is likely that you can
+simply remove the :samp:`##`.
+
+Both the tokens combined by :samp:`##` could come from the macro body,
+but you could just as well write them as one token in the first place.
+Token pasting is most useful when one or both of the tokens comes from a
+macro argument.  If either of the tokens next to an :samp:`##` is a
+parameter name, it is replaced by its actual argument before :samp:`##`
+executes.  As with stringizing, the actual argument is not
+macro-expanded first.  If the argument is empty, that :samp:`##` has no
+effect.
+
+Keep in mind that the C preprocessor converts comments to whitespace
+before macros are even considered.  Therefore, you cannot create a
+comment by concatenating :samp:`/` and :samp:`*`.  You can put as much
+whitespace between :samp:`##` and its operands as you like, including
+comments, and you can put comments in arguments that will be
+concatenated.  However, it is an error if :samp:`##` appears at either
+end of a macro body.
+
+Consider a C program that interprets named commands.  There probably
+needs to be a table of commands, perhaps an array of structures declared
+as follows:
+
+.. code-block:: c++
+
+  struct command
+  {
+    char *name;
+    void (*function) (void);
+  };
+
+  struct command commands[] =
+  {
+    { "quit", quit_command },
+    { "help", help_command },
+    ...
+  };
+
+It would be cleaner not to have to give each command name twice, once in
+the string constant and once in the function name.  A macro which takes the
+name of a command as an argument can make this unnecessary.  The string
+constant can be created with stringizing, and the function name by
+concatenating the argument with :samp:`_command`.  Here is how it is done:
+
+.. code-block:: c++
+
+  #define COMMAND(NAME)  { #NAME, NAME ## _command }
+
+  struct command commands[] =
+  {
+    COMMAND (quit),
+    COMMAND (help),
+    ...
+  };
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/directives-within-macro-arguments.rst b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
new file mode 100644
index 00000000000..2e7e82563e9
--- /dev/null
+++ b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: macro arguments and directives
+
+.. _directives-within-macro-arguments:
+
+Directives Within Macro Arguments
+*********************************
+
+Occasionally it is convenient to use preprocessor directives within
+the arguments of a macro.  The C and C++ standards declare that
+behavior in these cases is undefined.  GNU CPP
+processes arbitrary directives within macro arguments in
+exactly the same way as it would have processed the directive were the
+function-like macro invocation not present.
+
+If, within a macro invocation, that macro is redefined, then the new
+definition takes effect in time for argument pre-expansion, but the
+original definition is still used for argument replacement.  Here is a
+pathological example:
+
+.. code-block:: c++
+
+  #define f(x) x x
+  f (1
+  #undef f
+  #define f 2
+  f)
+
+which expands to
+
+.. code-block:: c++
+
+  1 2 1 2
+
+with the semantics described above.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/function-like-macros.rst b/gcc/doc/cpp/macros/function-like-macros.rst
new file mode 100644
index 00000000000..16ba2cf1a1a
--- /dev/null
+++ b/gcc/doc/cpp/macros/function-like-macros.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: function-like macros
+
+.. _function-like-macros:
+
+Function-like Macros
+********************
+
+You can also define macros whose use looks like a function call.  These
+are called :dfn:`function-like macros`.  To define a function-like macro,
+you use the same :samp:`#define` directive, but you put a pair of
+parentheses immediately after the macro name.  For example,
+
+.. code-block::
+
+  #define lang_init()  c_init()
+  lang_init()
+       → c_init()
+
+A function-like macro is only expanded if its name appears with a pair
+of parentheses after it.  If you write just the name, it is left alone.
+This can be useful when you have a function and a macro of the same
+name, and you wish to use the function sometimes.
+
+.. code-block::
+
+  extern void foo(void);
+  #define foo() /* optimized inline version */
+  ...
+    foo();
+    funcptr = foo;
+
+Here the call to ``foo()`` will use the macro, but the function
+pointer will get the address of the real function.  If the macro were to
+be expanded, it would cause a syntax error.
+
+If you put spaces between the macro name and the parentheses in the
+macro definition, that does not define a function-like macro, it defines
+an object-like macro whose expansion happens to begin with a pair of
+parentheses.
+
+.. code-block::
+
+  #define lang_init ()    c_init()
+  lang_init()
+       → () c_init()()
+
+The first two pairs of parentheses in this expansion come from the
+macro.  The third is the pair that was originally after the macro
+invocation.  Since ``lang_init`` is an object-like macro, it does not
+consume those parentheses.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-arguments.rst b/gcc/doc/cpp/macros/macro-arguments.rst
new file mode 100644
index 00000000000..06911523e7f
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-arguments.rst
@@ -0,0 +1,112 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: arguments, macros with arguments, arguments in macro definitions
+
+.. _macro-arguments:
+
+Macro Arguments
+***************
+
+Function-like macros can take :dfn:`arguments`, just like true functions.
+To define a macro that uses arguments, you insert :dfn:`parameters`
+between the pair of parentheses in the macro definition that make the
+macro function-like.  The parameters must be valid C identifiers,
+separated by commas and optionally whitespace.
+
+To invoke a macro that takes arguments, you write the name of the macro
+followed by a list of :dfn:`actual arguments` in parentheses, separated
+by commas.  The invocation of the macro need not be restricted to a
+single logical line---it can cross as many lines in the source file as
+you wish.  The number of arguments you give must match the number of
+parameters in the macro definition.  When the macro is expanded, each
+use of a parameter in its body is replaced by the tokens of the
+corresponding argument.  (You need not use all of the parameters in the
+macro body.)
+
+As an example, here is a macro that computes the minimum of two numeric
+values, as it is defined in many C programs, and some uses.
+
+.. code-block::
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+    x = min(a, b);          →  x = ((a) < (b) ? (a) : (b));
+    y = min(1, 2);          →  y = ((1) < (2) ? (1) : (2));
+    z = min(a + 28, *p);    →  z = ((a + 28) < (*p) ? (a + 28) : (*p));
+
+(In this small example you can already see several of the dangers of
+macro arguments.  See :ref:`macro-pitfalls`, for detailed explanations.)
+
+Leading and trailing whitespace in each argument is dropped, and all
+whitespace between the tokens of an argument is reduced to a single
+space.  Parentheses within each argument must balance; a comma within
+such parentheses does not end the argument.  However, there is no
+requirement for square brackets or braces to balance, and they do not
+prevent a comma from separating arguments.  Thus,
+
+.. code-block:: c++
+
+  macro (array[x = y, x + 1])
+
+passes two arguments to ``macro`` : ``array[x = y`` and ``x +
+1]``.  If you want to supply ``array[x = y, x + 1]`` as an argument,
+you can write it as ``array[(x = y, x + 1)]``, which is equivalent C
+code.
+
+All arguments to a macro are completely macro-expanded before they are
+substituted into the macro body.  After substitution, the complete text
+is scanned again for macros to expand, including the arguments.  This rule
+may seem strange, but it is carefully designed so you need not worry
+about whether any function call is actually a macro invocation.  You can
+run into trouble if you try to be too clever, though.  See :ref:`argument-prescan`, for detailed discussion.
+
+For example, ``min (min (a, b), c)`` is first expanded to
+
+.. code-block:: c++
+
+    min (((a) < (b) ? (a) : (b)), (c))
+
+and then to
+
+.. code-block:: c++
+
+  ((((a) < (b) ? (a) : (b))) < (c)
+   ? (((a) < (b) ? (a) : (b)))
+   : (c))
+
+(Line breaks shown here for clarity would not actually be generated.)
+
+.. index:: empty macro arguments
+
+You can leave macro arguments empty; this is not an error to the
+preprocessor (but many macros will then expand to invalid code).
+You cannot leave out arguments entirely; if a macro takes two arguments,
+there must be exactly one comma at the top level of its argument list.
+Here are some silly examples using ``min`` :
+
+.. code-block::
+
+  min(, b)        → ((   ) < (b) ? (   ) : (b))
+  min(a, )        → ((a  ) < ( ) ? (a  ) : ( ))
+  min(,)          → ((   ) < ( ) ? (   ) : ( ))
+  min((,),)       → (((,)) < ( ) ? ((,)) : ( ))
+
+  min()      error macro "min" requires 2 arguments, but only 1 given
+  min(,,)    error macro "min" passed 3 arguments, but takes just 2
+
+Whitespace is not a preprocessing token, so if a macro ``foo`` takes
+one argument, ``foo ()`` and ``foo ( )`` both supply it an
+empty argument.  Previous GNU preprocessor implementations and
+documentation were incorrect on this point, insisting that a
+function-like macro that takes a single argument be passed a space if an
+empty argument was required.
+
+Macro parameters appearing inside string literals are not replaced by
+their corresponding actual arguments.
+
+.. code-block::
+
+  #define foo(x) x, "x"
+  foo(bar)        → bar, "x"
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-pitfalls.rst b/gcc/doc/cpp/macros/macro-pitfalls.rst
new file mode 100644
index 00000000000..0be22954a76
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-pitfalls.rst
@@ -0,0 +1,449 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: problems with macros, pitfalls of macros
+
+.. _macro-pitfalls:
+
+Macro Pitfalls
+**************
+
+In this section we describe some special rules that apply to macros and
+macro expansion, and point out certain cases in which the rules have
+counter-intuitive consequences that you must watch out for.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. _misnesting:
+
+Misnesting
+^^^^^^^^^^
+
+When a macro is called with arguments, the arguments are substituted
+into the macro body and the result is checked, together with the rest of
+the input file, for more macro calls.  It is possible to piece together
+a macro call coming partially from the macro body and partially from the
+arguments.  For example,
+
+.. code-block::
+
+  #define twice(x) (2*(x))
+  #define call_with_1(x) x(1)
+  call_with_1 (twice)
+       → twice(1)
+       → (2*(1))
+
+Macro definitions do not have to have balanced parentheses.  By writing
+an unbalanced open parenthesis in a macro body, it is possible to create
+a macro call that begins inside the macro body but ends outside of it.
+For example,
+
+.. code-block::
+
+  #define strange(file) fprintf (file, "%s %d",
+  ...
+  strange(stderr) p, 35)
+       → fprintf (stderr, "%s %d", p, 35)
+
+The ability to piece together a macro call can be useful, but the use of
+unbalanced open parentheses in a macro body is just confusing, and
+should be avoided.
+
+.. index:: parentheses in macro bodies
+
+.. _operator-precedence-problems:
+
+Operator Precedence Problems
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You may have noticed that in most of the macro definition examples shown
+above, each occurrence of a macro argument name had parentheses around
+it.  In addition, another pair of parentheses usually surround the
+entire macro definition.  Here is why it is best to write macros that
+way.
+
+Suppose you define a macro as follows,
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (x + y - 1) / y
+
+whose purpose is to divide, rounding up.  (One use for this operation is
+to compute how many ``int`` objects are needed to hold a certain
+number of ``char`` objects.)  Then suppose it is used as follows:
+
+.. code-block::
+
+  a = ceil_div (b & c, sizeof (int));
+       → a = (b & c + sizeof (int) - 1) / sizeof (int);
+
+This does not do what is intended.  The operator-precedence rules of
+C make it equivalent to this:
+
+.. code-block:: c++
+
+  a = (b & (c + sizeof (int) - 1)) / sizeof (int);
+
+What we want is this:
+
+.. code-block:: c++
+
+  a = ((b & c) + sizeof (int) - 1)) / sizeof (int);
+
+Defining the macro as
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) ((x) + (y) - 1) / (y)
+
+provides the desired result.
+
+Unintended grouping can result in another way.  Consider ``sizeof
+ceil_div(1, 2)``.  That has the appearance of a C expression that would
+compute the size of the type of ``ceil_div (1, 2)``, but in fact it
+means something very different.  Here is what it expands to:
+
+.. code-block:: c++
+
+  sizeof ((1) + (2) - 1) / (2)
+
+This would take the size of an integer and divide it by two.  The
+precedence rules have put the division outside the ``sizeof`` when it
+was intended to be inside.
+
+Parentheses around the entire macro definition prevent such problems.
+Here, then, is the recommended way to define ``ceil_div`` :
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (((x) + (y) - 1) / (y))
+
+.. index:: semicolons (after macro calls)
+
+.. _swallowing-the-semicolon:
+
+Swallowing the Semicolon
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+Often it is desirable to define a macro that expands into a compound
+statement.  Consider, for example, the following macro, that advances a
+pointer (the argument ``p`` says where to find it) across whitespace
+characters:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)  \
+  { char *lim = (limit);         \
+    while (p < lim) {            \
+      if (*p++ != ' ') {         \
+        p--; break; }}}
+
+Here backslash-newline is used to split the macro definition, which must
+be a single logical line, so that it resembles the way such code would
+be laid out if not part of a macro definition.
+
+A call to this macro might be ``SKIP_SPACES (p, lim)``.  Strictly
+speaking, the call expands to a compound statement, which is a complete
+statement with no need for a semicolon to end it.  However, since it
+looks like a function call, it minimizes confusion if you can use it
+like a function call, writing a semicolon afterward, as in
+``SKIP_SPACES (p, lim);``
+
+This can cause trouble before ``else`` statements, because the
+semicolon is actually a null statement.  Suppose you write
+
+.. code-block:: c++
+
+  if (*p != 0)
+    SKIP_SPACES (p, lim);
+  else ...
+
+The presence of two statements---the compound statement and a null
+statement---in between the ``if`` condition and the ``else``
+makes invalid C code.
+
+The definition of the macro ``SKIP_SPACES`` can be altered to solve
+this problem, using a ``do ... while`` statement.  Here is how:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)     \
+  do { char *lim = (limit);         \
+       while (p < lim) {            \
+         if (*p++ != ' ') {         \
+           p--; break; }}}          \
+  while (0)
+
+Now ``SKIP_SPACES (p, lim);`` expands into
+
+.. code-block:: c++
+
+  do {...} while (0);
+
+which is one statement.  The loop executes exactly once; most compilers
+generate no extra code for it.
+
+.. index:: side effects (in macro arguments), unsafe macros
+
+.. _duplication-of-side-effects:
+
+Duplication of Side Effects
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Many C programs define a macro ``min``, for 'minimum', like this:
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+
+When you use this macro with an argument containing a side effect,
+as shown here,
+
+.. code-block:: c++
+
+  next = min (x + y, foo (z));
+
+it expands as follows:
+
+.. code-block:: c++
+
+  next = ((x + y) < (foo (z)) ? (x + y) : (foo (z)));
+
+where ``x + y`` has been substituted for ``X`` and ``foo (z)``
+for ``Y``.
+
+The function ``foo`` is used only once in the statement as it appears
+in the program, but the expression ``foo (z)`` has been substituted
+twice into the macro expansion.  As a result, ``foo`` might be called
+two times when the statement is executed.  If it has side effects or if
+it takes a long time to compute, the results might not be what you
+intended.  We say that ``min`` is an :dfn:`unsafe` macro.
+
+The best solution to this problem is to define ``min`` in a way that
+computes the value of ``foo (z)`` only once.  The C language offers
+no standard way to do this, but it can be done with GNU extensions as
+follows:
+
+.. code-block:: c++
+
+  #define min(X, Y)                \
+  ({ typeof (X) x_ = (X);          \
+     typeof (Y) y_ = (Y);          \
+     (x_ < y_) ? x_ : y_; })
+
+The :samp:`({ ... })` notation produces a compound statement that
+acts as an expression.  Its value is the value of its last statement.
+This permits us to define local variables and assign each argument to
+one.  The local variables have underscores after their names to reduce
+the risk of conflict with an identifier of wider scope (it is impossible
+to avoid this entirely).  Now each argument is evaluated exactly once.
+
+If you do not wish to use GNU C extensions, the only solution is to be
+careful when *using* the macro ``min``.  For example, you can
+calculate the value of ``foo (z)``, save it in a variable, and use
+that variable in ``min`` :
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+  ...
+  {
+    int tem = foo (z);
+    next = min (x + y, tem);
+  }
+
+(where we assume that ``foo`` returns type ``int``).
+
+.. index:: self-reference
+
+.. _self-referential-macros:
+
+Self-Referential Macros
+^^^^^^^^^^^^^^^^^^^^^^^
+
+A :dfn:`self-referential` macro is one whose name appears in its
+definition.  Recall that all macro definitions are rescanned for more
+macros to replace.  If the self-reference were considered a use of the
+macro, it would produce an infinitely large expansion.  To prevent this,
+the self-reference is not considered a macro call.  It is passed into
+the preprocessor output unchanged.  Consider an example:
+
+.. code-block:: c++
+
+  #define foo (4 + foo)
+
+where ``foo`` is also a variable in your program.
+
+Following the ordinary rules, each reference to ``foo`` will expand
+into ``(4 + foo)`` ; then this will be rescanned and will expand into
+``(4 + (4 + foo))`` ; and so on until the computer runs out of memory.
+
+The self-reference rule cuts this process short after one step, at
+``(4 + foo)``.  Therefore, this macro definition has the possibly
+useful effect of causing the program to add 4 to the value of ``foo``
+wherever ``foo`` is referred to.
+
+In most cases, it is a bad idea to take advantage of this feature.  A
+person reading the program who sees that ``foo`` is a variable will
+not expect that it is a macro as well.  The reader will come across the
+identifier ``foo`` in the program and think its value should be that
+of the variable ``foo``, whereas in fact the value is four greater.
+
+One common, useful use of self-reference is to create a macro which
+expands to itself.  If you write
+
+.. code-block:: c++
+
+  #define EPERM EPERM
+
+then the macro ``EPERM`` expands to ``EPERM``.  Effectively, it is
+left alone by the preprocessor whenever it's used in running text.  You
+can tell that it's a macro with :samp:`#ifdef`.  You might do this if you
+want to define numeric constants with an ``enum``, but have
+:samp:`#ifdef` be true for each constant.
+
+If a macro ``x`` expands to use a macro ``y``, and the expansion of
+``y`` refers to the macro ``x``, that is an :dfn:`indirect
+self-reference` of ``x``.  ``x`` is not expanded in this case
+either.  Thus, if we have
+
+.. code-block:: c++
+
+  #define x (4 + y)
+  #define y (2 * x)
+
+then ``x`` and ``y`` expand as follows:
+
+.. code-block::
+
+  x    → (4 + y)
+       → (4 + (2 * x))
+
+  y    → (2 * x)
+       → (2 * (4 + y))
+
+Each macro is expanded when it appears in the definition of the other
+macro, but not when it indirectly appears in its own definition.
+
+.. index:: expansion of arguments, macro argument expansion, prescan of macro arguments
+
+.. _argument-prescan:
+
+Argument Prescan
+^^^^^^^^^^^^^^^^
+
+Macro arguments are completely macro-expanded before they are
+substituted into a macro body, unless they are stringized or pasted
+with other tokens.  After substitution, the entire macro body, including
+the substituted arguments, is scanned again for macros to be expanded.
+The result is that the arguments are scanned *twice* to expand
+macro calls in them.
+
+Most of the time, this has no effect.  If the argument contained any
+macro calls, they are expanded during the first scan.  The result
+therefore contains no macro calls, so the second scan does not change
+it.  If the argument were substituted as given, with no prescan, the
+single remaining scan would find the same macro calls and produce the
+same results.
+
+You might expect the double scan to change the results when a
+self-referential macro is used in an argument of another macro
+(see :ref:`self-referential-macros`): the self-referential macro would be
+expanded once in the first scan, and a second time in the second scan.
+However, this is not what happens.  The self-references that do not
+expand in the first scan are marked so that they will not expand in the
+second scan either.
+
+You might wonder, 'Why mention the prescan, if it makes no difference?
+And why not skip it and make the preprocessor faster?'  The answer is
+that the prescan does make a difference in three special cases:
+
+* Nested calls to a macro.
+
+  We say that :dfn:`nested` calls to a macro occur when a macro's argument
+  contains a call to that very macro.  For example, if ``f`` is a macro
+  that expects one argument, ``f (f (1))`` is a nested pair of calls to
+  ``f``.  The desired expansion is made by expanding ``f (1)`` and
+  substituting that into the definition of ``f``.  The prescan causes
+  the expected result to happen.  Without the prescan, ``f (1)`` itself
+  would be substituted as an argument, and the inner use of ``f`` would
+  appear during the main scan as an indirect self-reference and would not
+  be expanded.
+
+* Macros that call other macros that stringize or concatenate.
+
+  If an argument is stringized or concatenated, the prescan does not
+  occur.  If you *want* to expand a macro, then stringize or
+  concatenate its expansion, you can do that by causing one macro to call
+  another macro that does the stringizing or concatenation.  For
+  instance, if you have
+
+  .. code-block:: c++
+
+    #define AFTERX(x) X_ ## x
+    #define XAFTERX(x) AFTERX(x)
+    #define TABLESIZE 1024
+    #define BUFSIZE TABLESIZE
+
+  then ``AFTERX(BUFSIZE)`` expands to ``X_BUFSIZE``, and
+  ``XAFTERX(BUFSIZE)`` expands to ``X_1024``.  (Not to
+  ``X_TABLESIZE``.  Prescan always does a complete expansion.)
+
+* Macros used in arguments, whose expansions contain unshielded commas.
+
+  This can cause a macro expanded on the second scan to be called with the
+  wrong number of arguments.  Here is an example:
+
+  .. code-block:: c++
+
+    #define foo  a,b
+    #define bar(x) lose(x)
+    #define lose(x) (1 + (x))
+
+  We would like ``bar(foo)`` to turn into ``(1 + (foo))``, which
+  would then turn into ``(1 + (a,b))``.  Instead, ``bar(foo)``
+  expands into ``lose(a,b)``, and you get an error because ``lose``
+  requires a single argument.  In this case, the problem is easily solved
+  by the same parentheses that ought to be used to prevent misnesting of
+  arithmetic operations:
+
+  .. code-block::
+
+    #define foo (a,b)
+    or#define bar(x) lose((x))
+
+  The extra pair of parentheses prevents the comma in ``foo`` 's
+  definition from being interpreted as an argument separator.
+
+.. index:: newlines in macro arguments
+
+.. _newlines-in-arguments:
+
+Newlines in Arguments
+^^^^^^^^^^^^^^^^^^^^^
+
+The invocation of a function-like macro can extend over many logical
+lines.  However, in the present implementation, the entire expansion
+comes out on one line.  Thus line numbers emitted by the compiler or
+debugger refer to the line the invocation started on, which might be
+different to the line containing the argument causing the problem.
+
+Here is an example illustrating this:
+
+.. code-block:: c++
+
+  #define ignore_second_arg(a,b,c) a; c
+
+  ignore_second_arg (foo (),
+                     ignored (),
+                     syntax error);
+
+The syntax error triggered by the tokens ``syntax error`` results in
+an error message citing line three---the line of ignore_second_arg---
+even though the problematic code comes from line five.
+
+We consider this a bug, and intend to fix it in the near future.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/object-like-macros.rst b/gcc/doc/cpp/macros/object-like-macros.rst
new file mode 100644
index 00000000000..c5e6e4cd466
--- /dev/null
+++ b/gcc/doc/cpp/macros/object-like-macros.rst
@@ -0,0 +1,126 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: object-like macro, symbolic constants, manifest constants
+
+.. _object-like-macros:
+
+Object-like Macros
+******************
+
+An :dfn:`object-like macro` is a simple identifier which will be replaced
+by a code fragment.  It is called object-like because it looks like a
+data object in code that uses it.  They are most commonly used to give
+symbolic names to numeric constants.
+
+.. index:: #define
+
+You create macros with the :samp:`#define` directive.  :samp:`#define` is
+followed by the name of the macro and then the token sequence it should
+be an abbreviation for, which is variously referred to as the macro's
+:dfn:`body`, :dfn:`expansion` or :dfn:`replacement list`.  For example,
+
+.. code-block:: c++
+
+  #define BUFFER_SIZE 1024
+
+defines a macro named ``BUFFER_SIZE`` as an abbreviation for the
+token ``1024``.  If somewhere after this :samp:`#define` directive
+there comes a C statement of the form
+
+.. code-block:: c++
+
+  foo = (char *) malloc (BUFFER_SIZE);
+
+then the C preprocessor will recognize and :dfn:`expand` the macro
+``BUFFER_SIZE``.  The C compiler will see the same tokens as it would
+if you had written
+
+.. code-block:: c++
+
+  foo = (char *) malloc (1024);
+
+By convention, macro names are written in uppercase.  Programs are
+easier to read when it is possible to tell at a glance which names are
+macros.
+
+The macro's body ends at the end of the :samp:`#define` line.  You may
+continue the definition onto multiple lines, if necessary, using
+backslash-newline.  When the macro is expanded, however, it will all
+come out on one line.  For example,
+
+.. code-block::
+
+  #define NUMBERS 1, \
+                  2, \
+                  3
+  int x[] = { NUMBERS };
+       → int x[] = { 1, 2, 3 };
+
+The most common visible consequence of this is surprising line numbers
+in error messages.
+
+There is no restriction on what can go in a macro body provided it
+decomposes into valid preprocessing tokens.  Parentheses need not
+balance, and the body need not resemble valid C code.  (If it does not,
+you may get error messages from the C compiler when you use the macro.)
+
+The C preprocessor scans your program sequentially.  Macro definitions
+take effect at the place you write them.  Therefore, the following input
+to the C preprocessor
+
+.. code-block:: c++
+
+  foo = X;
+  #define X 4
+  bar = X;
+
+produces
+
+.. code-block:: c++
+
+  foo = X;
+  bar = 4;
+
+When the preprocessor expands a macro name, the macro's expansion
+replaces the macro invocation, then the expansion is examined for more
+macros to expand.  For example,
+
+.. code-block::
+
+  #define TABLESIZE BUFSIZE
+  #define BUFSIZE 1024
+  TABLESIZE
+       → BUFSIZE
+       → 1024
+
+``TABLESIZE`` is expanded first to produce ``BUFSIZE``, then that
+macro is expanded to produce the final result, ``1024``.
+
+Notice that ``BUFSIZE`` was not defined when ``TABLESIZE`` was
+defined.  The :samp:`#define` for ``TABLESIZE`` uses exactly the
+expansion you specify---in this case, ``BUFSIZE`` ---and does not
+check to see whether it too contains macro names.  Only when you
+*use* ``TABLESIZE`` is the result of its expansion scanned for
+more macro names.
+
+This makes a difference if you change the definition of ``BUFSIZE``
+at some point in the source file.  ``TABLESIZE``, defined as shown,
+will always expand using the definition of ``BUFSIZE`` that is
+currently in effect:
+
+.. code-block:: c++
+
+  #define BUFSIZE 1020
+  #define TABLESIZE BUFSIZE
+  #undef BUFSIZE
+  #define BUFSIZE 37
+
+Now ``TABLESIZE`` expands (in two stages) to ``37``.
+
+If the expansion of a macro contains its own name, either directly or
+via intermediate macros, it is not expanded again when the expansion is
+examined for more macros.  This prevents infinite recursion.
+See :ref:`self-referential-macros`, for the precise details.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/predefined-macros.rst b/gcc/doc/cpp/macros/predefined-macros.rst
new file mode 100644
index 00000000000..8af566e0dc3
--- /dev/null
+++ b/gcc/doc/cpp/macros/predefined-macros.rst
@@ -0,0 +1,874 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: predefined macros
+
+.. _predefined-macros:
+
+Predefined Macros
+*****************
+
+Several object-like macros are predefined; you use them without
+supplying their definitions.  They fall into three classes: standard,
+common, and system-specific.
+
+In C++, there is a fourth category, the named operators.  They act like
+predefined macros, but you cannot undefine them.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: standard predefined macros.
+
+.. _standard-predefined-macros:
+
+Standard Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The standard predefined macros are specified by the relevant
+language standards, so they are available with all compilers that
+implement those standards.  Older compilers may not provide all of
+them.  Their names all start with double underscores.
+
+.. c:macro:: __FILE__
+
+  This macro expands to the name of the current input file, in the form of
+  a C string constant.  This is the path by which the preprocessor opened
+  the file, not the short name specified in :samp:`#include` or as the
+  input file name argument.  For example,
+  ``"/usr/local/include/myheader.h"`` is a possible expansion of this
+  macro.
+
+.. c:macro:: __LINE__
+
+  This macro expands to the current input line number, in the form of a
+  decimal integer constant.  While we call it a predefined macro, it's
+  a pretty strange macro, since its 'definition' changes with each
+  new line of source code.
+
+  ``__FILE__`` and ``__LINE__`` are useful in generating an error
+  message to report an inconsistency detected by the program; the message
+  can state the source line at which the inconsistency was detected.  For
+  example,
+
+.. code-block:: c++
+
+  fprintf (stderr, "Internal error: "
+                   "negative string length "
+                   "%d at %s, line %d.",
+           length, __FILE__, __LINE__);
+
+An :samp:`#include` directive changes the expansions of ``__FILE__``
+and ``__LINE__`` to correspond to the included file.  At the end of
+that file, when processing resumes on the input file that contained
+the :samp:`#include` directive, the expansions of ``__FILE__`` and
+``__LINE__`` revert to the values they had before the
+:samp:`#include` (but ``__LINE__`` is then incremented by one as
+processing moves to the line after the :samp:`#include`).
+
+A :samp:`#line` directive changes ``__LINE__``, and may change
+``__FILE__`` as well.  See :ref:`line-control`.
+
+C99 introduced ``__func__``, and GCC has provided ``__FUNCTION__``
+for a long time.  Both of these are strings containing the name of the
+current function (there are slight semantic differences; see the GCC
+manual).  Neither of them is a macro; the preprocessor does not know the
+name of the current function.  They tend to be useful in conjunction
+with ``__FILE__`` and ``__LINE__``, though.
+
+.. c:macro:: __DATE__
+
+  This macro expands to a string constant that describes the date on which
+  the preprocessor is being run.  The string constant contains eleven
+  characters and looks like ``"Feb 12 1996"``.  If the day of the
+  month is less than 10, it is padded with a space on the left.
+
+  If GCC cannot determine the current date, it will emit a warning message
+  (once per compilation) and ``__DATE__`` will expand to
+  ``"??? ?? ????"``.
+
+.. c:macro:: __TIME__
+
+  This macro expands to a string constant that describes the time at
+  which the preprocessor is being run.  The string constant contains
+  eight characters and looks like ``"23:59:01"``.
+
+  If GCC cannot determine the current time, it will emit a warning message
+  (once per compilation) and ``__TIME__`` will expand to
+  ``"??:??:??"``.
+
+.. c:macro:: __STDC__
+
+  In normal operation, this macro expands to the constant 1, to signify
+  that this compiler conforms to ISO Standard C.  If GNU CPP is used with
+  a compiler other than GCC, this is not necessarily true; however, the
+  preprocessor always conforms to the standard unless the
+  :option:`-traditional-cpp` option is used.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is used.
+
+  On some hosts, the system compiler uses a different convention, where
+  ``__STDC__`` is normally 0, but is 1 if the user specifies strict
+  conformance to the C Standard.  CPP follows the host convention when
+  processing system header files, but when processing user files
+  ``__STDC__`` is always 1.  This has been reported to cause problems;
+  for instance, some versions of Solaris provide X Windows headers that
+  expect ``__STDC__`` to be either undefined or 1.  See :ref:`invocation`.
+
+.. c:macro:: __STDC_VERSION__
+
+  This macro expands to the C Standard's version number, a long integer
+  constant of the form ``yyyymmL`` where :samp:`{yyyy}` and
+  :samp:`{mm}` are the year and month of the Standard version.  This signifies
+  which version of the C Standard the compiler conforms to.  Like
+  ``__STDC__``, this is not necessarily accurate for the entire
+  implementation, unless GNU CPP is being used with GCC.
+
+  The value ``199409L`` signifies the 1989 C standard as amended in
+  1994, which is the current default; the value ``199901L`` signifies
+  the 1999 revision of the C standard; the value ``201112L``
+  signifies the 2011 revision of the C standard; the value
+  ``201710L`` signifies the 2017 revision of the C standard (which is
+  otherwise identical to the 2011 version apart from correction of
+  defects).  An unspecified value larger than ``201710L`` is used for
+  the experimental :option:`-std=c2x` and :option:`-std=gnu2x` modes.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is
+  used, nor when compiling C++ or Objective-C.
+
+.. c:macro:: __STDC_HOSTED__
+
+  This macro is defined, with value 1, if the compiler's target is a
+  :dfn:`hosted environment`.  A hosted environment has the complete
+  facilities of the standard C library available.
+
+.. c:macro:: __cplusplus
+
+  This macro is defined when the C++ compiler is in use.  You can use
+  ``__cplusplus`` to test whether a header is compiled by a C compiler
+  or a C++ compiler.  This macro is similar to ``__STDC_VERSION__``, in
+  that it expands to a version number.  Depending on the language standard
+  selected, the value of the macro is
+  ``199711L`` for the 1998 C++ standard,
+  ``201103L`` for the 2011 C++ standard,
+  ``201402L`` for the 2014 C++ standard,
+  ``201703L`` for the 2017 C++ standard,
+  ``202002L`` for the 2020 C++ standard,
+  or an unspecified value strictly larger than ``202002L`` for the
+  experimental languages enabled by :option:`-std=c++23` and
+  :option:`-std=gnu++23`.
+
+.. c:macro:: __OBJC__
+
+  This macro is defined, with value 1, when the Objective-C compiler is in
+  use.  You can use ``__OBJC__`` to test whether a header is compiled
+  by a C compiler or an Objective-C compiler.
+
+.. c:macro:: __ASSEMBLER__
+
+  This macro is defined with value 1 when preprocessing assembly
+  language.
+
+.. index:: common predefined macros
+
+.. _common-predefined-macros:
+
+Common Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+The common predefined macros are GNU C extensions.  They are available
+with the same meanings regardless of the machine or operating system on
+which you are using GNU C or GNU Fortran.  Their names all start with
+double underscores.
+
+.. c:macro:: __COUNTER__
+
+  This macro expands to sequential integral values starting from 0.  In
+  conjunction with the ``##`` operator, this provides a convenient means to
+  generate unique identifiers.  Care must be taken to ensure that
+  ``__COUNTER__`` is not expanded prior to inclusion of precompiled headers
+  which use it.  Otherwise, the precompiled headers will not be used.
+
+.. c:macro:: __GFORTRAN__
+
+  The GNU Fortran compiler defines this.
+
+.. c:macro:: __GNUC__
+             __GNUC_MINOR__
+             __GNUC_PATCHLEVEL__
+
+  These macros are defined by all GNU compilers that use the C
+  preprocessor: C, C++, Objective-C and Fortran.  Their values are the major
+  version, minor version, and patch level of the compiler, as integer
+  constants.  For example, GCC version :samp:`{x}`. :samp:`{y}`. :samp:`{z}`
+  defines ``__GNUC__`` to :samp:`{x}`, ``__GNUC_MINOR__`` to :samp:`{y}`,
+  and ``__GNUC_PATCHLEVEL__`` to :samp:`{z}`.  These
+  macros are also defined if you invoke the preprocessor directly.
+
+  If all you need to know is whether or not your program is being compiled
+  by GCC, or a non-GCC compiler that claims to accept the GNU C dialects,
+  you can simply test ``__GNUC__``.  If you need to write code
+  which depends on a specific version, you must be more careful.  Each
+  time the minor version is increased, the patch level is reset to zero;
+  each time the major version is increased, the
+  minor version and patch level are reset.  If you wish to use the
+  predefined macros directly in the conditional, you will need to write it
+  like this:
+
+  .. code-block:: c++
+
+    /* Test for GCC > 3.2.0 */
+    #if __GNUC__ > 3 || \
+        (__GNUC__ == 3 && (__GNUC_MINOR__ > 2 || \
+                           (__GNUC_MINOR__ == 2 && \
+                            __GNUC_PATCHLEVEL__ > 0))
+
+  Another approach is to use the predefined macros to
+  calculate a single number, then compare that against a threshold:
+
+  .. code-block:: c++
+
+    #define GCC_VERSION (__GNUC__ * 10000 \
+                         + __GNUC_MINOR__ * 100 \
+                         + __GNUC_PATCHLEVEL__)
+    ...
+    /* Test for GCC > 3.2.0 */
+    #if GCC_VERSION > 30200
+
+  Many people find this form easier to understand.
+
+.. c:macro:: __GNUG__
+
+  The GNU C++ compiler defines this.  Testing it is equivalent to
+  testing ``(__GNUC__ && __cplusplus)``.
+
+.. c:macro:: __STRICT_ANSI__
+
+  GCC defines this macro if and only if the :option:`-ansi` switch, or a
+  :option:`-std` switch specifying strict conformance to some version of ISO C
+  or ISO C++, was specified when GCC was invoked.  It is defined to :samp:`1`.
+  This macro exists primarily to direct GNU libc's header files to use only
+  definitions found in standard C.
+
+.. c:macro:: __BASE_FILE__
+
+  This macro expands to the name of the main input file, in the form
+  of a C string constant.  This is the source file that was specified
+  on the command line of the preprocessor or C compiler.
+
+.. c:macro:: __FILE_NAME__
+
+  This macro expands to the basename of the current input file, in the
+  form of a C string constant.  This is the last path component by which
+  the preprocessor opened the file.  For example, processing
+  ``"/usr/local/include/myheader.h"`` would set this
+  macro to ``"myheader.h"``.
+
+.. c:macro:: __INCLUDE_LEVEL__
+
+  This macro expands to a decimal integer constant that represents the
+  depth of nesting in include files.  The value of this macro is
+  incremented on every :samp:`#include` directive and decremented at the
+  end of every included file.  It starts out at 0, its value within the
+  base file specified on the command line.
+
+.. c:macro:: __ELF__
+
+  This macro is defined if the target uses the ELF object format.
+
+.. c:macro:: __VERSION__
+
+  This macro expands to a string constant which describes the version of
+  the compiler in use.  You should not rely on its contents having any
+  particular form, but it can be counted on to contain at least the
+  release number.
+
+.. c:macro:: __OPTIMIZE__
+             __OPTIMIZE_SIZE__
+             __NO_INLINE__
+
+  These macros describe the compilation mode.  ``__OPTIMIZE__`` is
+  defined in all optimizing compilations.  ``__OPTIMIZE_SIZE__`` is
+  defined if the compiler is optimizing for size, not speed.
+  ``__NO_INLINE__`` is defined if no functions will be inlined into
+  their callers (when not optimizing, or when inlining has been
+  specifically disabled by :option:`-fno-inline`).
+
+  These macros cause certain GNU header files to provide optimized
+  definitions, using macros or inline functions, of system library
+  functions.  You should not use these macros in any way unless you make
+  sure that programs will execute with the same effect whether or not they
+  are defined.  If they are defined, their value is 1.
+
+.. c:macro:: __GNUC_GNU_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled in GCC's traditional gnu90 mode.  Object files will contain
+  externally visible definitions of all functions declared ``inline``
+  without ``extern`` or ``static``.  They will not contain any
+  definitions of any functions declared ``extern inline``.
+
+.. c:macro:: __GNUC_STDC_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled according to the ISO C99 or later standards.  Object files will contain
+  externally visible definitions of all functions declared ``extern
+  inline``.  They will not contain definitions of any functions declared
+  ``inline`` without ``extern``.
+
+  If this macro is defined, GCC supports the ``gnu_inline`` function
+  attribute as a way to always get the gnu90 behavior.
+
+.. c:macro:: __CHAR_UNSIGNED__
+
+  GCC defines this macro if and only if the data type ``char`` is
+  unsigned on the target machine.  It exists to cause the standard header
+  file :samp:`limits.h` to work correctly.  You should not use this macro
+  yourself; instead, refer to the standard macros defined in :samp:`limits.h`.
+
+.. c:macro:: __WCHAR_UNSIGNED__
+
+  Like ``__CHAR_UNSIGNED__``, this macro is defined if and only if the
+  data type ``wchar_t`` is unsigned and the front-end is in C++ mode.
+
+.. c:macro:: __REGISTER_PREFIX__
+
+  This macro expands to a single token (not a string constant) which is
+  the prefix applied to CPU register names in assembly language for this
+  target.  You can use it to write assembly that is usable in multiple
+  environments.  For example, in the ``m68k-aout`` environment it
+  expands to nothing, but in the ``m68k-coff`` environment it expands
+  to a single :samp:`%`.
+
+.. c:macro:: __USER_LABEL_PREFIX__
+
+  This macro expands to a single token which is the prefix applied to
+  user labels (symbols visible to C code) in assembly.  For example, in
+  the ``m68k-aout`` environment it expands to an :samp:`_`, but in the
+  ``m68k-coff`` environment it expands to nothing.
+
+  This macro will have the correct definition even if
+  :option:`-f(no-)underscores` is in use, but it will not be correct if
+  target-specific options that adjust this prefix are used (e.g. the
+  OSF/rose :option:`-mno-underscores` option).
+
+.. c:macro:: __SIZE_TYPE__
+             __PTRDIFF_TYPE__
+             __WCHAR_TYPE__
+             __WINT_TYPE__
+             __INTMAX_TYPE__
+             __UINTMAX_TYPE__
+             __SIG_ATOMIC_TYPE__
+             __INT8_TYPE__
+             __INT16_TYPE__
+             __INT32_TYPE__
+             __INT64_TYPE__
+             __UINT8_TYPE__
+             __UINT16_TYPE__
+             __UINT32_TYPE__
+             __UINT64_TYPE__
+             __INT_LEAST8_TYPE__
+             __INT_LEAST16_TYPE__
+             __INT_LEAST32_TYPE__
+             __INT_LEAST64_TYPE__
+             __UINT_LEAST8_TYPE__
+             __UINT_LEAST16_TYPE__
+             __UINT_LEAST32_TYPE__
+             __UINT_LEAST64_TYPE__
+             __INT_FAST8_TYPE__
+             __INT_FAST16_TYPE__
+             __INT_FAST32_TYPE__
+             __INT_FAST64_TYPE__
+             __UINT_FAST8_TYPE__
+             __UINT_FAST16_TYPE__
+             __UINT_FAST32_TYPE__
+             __UINT_FAST64_TYPE__
+             __INTPTR_TYPE__
+             __UINTPTR_TYPE__
+
+  These macros are defined to the correct underlying types for the
+  ``size_t``, ``ptrdiff_t``, ``wchar_t``, ``wint_t``,
+  ``intmax_t``, ``uintmax_t``, ``sig_atomic_t``, ``int8_t``,
+  ``int16_t``, ``int32_t``, ``int64_t``, ``uint8_t``,
+  ``uint16_t``, ``uint32_t``, ``uint64_t``,
+  ``int_least8_t``, ``int_least16_t``, ``int_least32_t``,
+  ``int_least64_t``, ``uint_least8_t``, ``uint_least16_t``,
+  ``uint_least32_t``, ``uint_least64_t``, ``int_fast8_t``,
+  ``int_fast16_t``, ``int_fast32_t``, ``int_fast64_t``,
+  ``uint_fast8_t``, ``uint_fast16_t``, ``uint_fast32_t``,
+  ``uint_fast64_t``, ``intptr_t``, and ``uintptr_t`` typedefs,
+  respectively.  They exist to make the standard header files
+  :samp:`stddef.h`, :samp:`stdint.h`, and :samp:`wchar.h` work correctly.
+  You should not use these macros directly; instead, include the
+  appropriate headers and use the typedefs.  Some of these macros may
+  not be defined on particular systems if GCC does not provide a
+  :samp:`stdint.h` header on those systems.
+
+.. c:macro:: __CHAR_BIT__
+
+  Defined to the number of bits used in the representation of the
+  ``char`` data type.  It exists to make the standard header given
+  numerical limits work correctly.  You should not use
+  this macro directly; instead, include the appropriate headers.
+
+.. c:macro::[...]

[diff truncated at 524288 bytes]

[gcc(refs/users/marxin/heads/sphinx-final)] sphinx: copy files from texi2rst-generated repository

[Martin Liska]

https://gcc.gnu.org/g:96d294c641d9225bc7649379b79e1785bf9df0d5

commit 96d294c641d9225bc7649379b79e1785bf9df0d5
Author: Martin Liska <mliska@suse.cz>
Date:   Mon Nov 7 12:54:13 2022 +0100

    sphinx: copy files from texi2rst-generated repository
    
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            * doc/cpp/deleted-code.rst: New file.
            * doc/cpp/diagnostics.rst: New file.
            * doc/cpp/environment-variables.rst: New file.
            * doc/cpp/gnu-free-documentation-license.rst: New file.
            * doc/cpp/header-files.rst: New file.
            * doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst: New file.
            * doc/cpp/header-files/computed-includes.rst: New file.
            * doc/cpp/header-files/include-operation.rst: New file.
            * doc/cpp/header-files/include-syntax.rst: New file.
            * doc/cpp/header-files/once-only-headers.rst: New file.
            * doc/cpp/header-files/search-path.rst: New file.
            * doc/cpp/header-files/system-headers.rst: New file.
            * doc/cpp/header-files/wrapper-headers.rst: New file.
            * doc/cpp/implementation-defined-behavior.rst: New file.
            * doc/cpp/implementation-details.rst: New file.
            * doc/cpp/implementation-limits.rst: New file.
            * doc/cpp/index.rst: New file.
            * doc/cpp/indices-and-tables.rst: New file.
            * doc/cpp/initial-processing.rst: New file.
            * doc/cpp/invocation.rst: New file.
            * doc/cpp/line-control.rst: New file.
            * doc/cpp/macros.rst: New file.
            * doc/cpp/macros/concatenation.rst: New file.
            * doc/cpp/macros/directives-within-macro-arguments.rst: New file.
            * doc/cpp/macros/function-like-macros.rst: New file.
            * doc/cpp/macros/macro-arguments.rst: New file.
            * doc/cpp/macros/macro-pitfalls.rst: New file.
            * doc/cpp/macros/object-like-macros.rst: New file.
            * doc/cpp/macros/predefined-macros.rst: New file.
            * doc/cpp/macros/stringizing.rst: New file.
            * doc/cpp/macros/undefining-and-redefining-macros.rst: New file.
            * doc/cpp/macros/variadic-macros.rst: New file.
            * doc/cpp/obsolete-features.rst: New file.
            * doc/cpp/other-directives.rst: New file.
            * doc/cpp/overview.rst: New file.
            * doc/cpp/pragmas.rst: New file.
            * doc/cpp/preprocessor-output.rst: New file.
            * doc/cpp/the-preprocessing-language.rst: New file.
            * doc/cpp/tokenization.rst: New file.
            * doc/cpp/traditional-lexical-analysis.rst: New file.
            * doc/cpp/traditional-macros.rst: New file.
            * doc/cpp/traditional-miscellany.rst: New file.
            * doc/cpp/traditional-mode.rst: New file.
            * doc/cpp/traditional-warnings.rst: New file.
            * doc/cppinternals/conf.py: New file.
            * doc/cppinternals/copyright.rst: New file.
            * doc/cppinternals/cppinternals.rst: New file.
            * doc/cppinternals/cpplib.rst: New file.
            * doc/cppinternals/files.rst: New file.
            * doc/cppinternals/index.rst: New file.
            * doc/cppinternals/indices-and-tables.rst: New file.
            * doc/cppinternals/internal-representation-of-macros.rst: New file.
            * doc/cppinternals/just-which-line-number-anyway.rst: New file.
            * doc/cppinternals/lexing-a-line.rst: New file.
            * doc/cppinternals/lexing-a-token.rst: New file.
            * doc/cppinternals/looking-for-a-function-like-macros-opening-parenthesis.rst: New file.
            * doc/cppinternals/macro-expansion-overview.rst: New file.
            * doc/cppinternals/marking-tokens-ineligible-for-future-expansion.rst: New file.
            * doc/cppinternals/multiple-include-optimization.rst: New file.
            * doc/cppinternals/overview.rst: New file.
            * doc/cppinternals/representation-of-line-numbers.rst: New file.
            * doc/cppinternals/scanning-the-replacement-list-for-macros-to-expand.rst: New file.
            * doc/gcc/binary-compatibility.rst: New file.
            * doc/gcc/c++-implementation-defined-behavior.rst: New file.
            * doc/gcc/c-implementation-defined-behavior.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/architecture.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/arrays-and-pointers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/characters.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/declarators.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/environment.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/floating-point.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/hints.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/identifiers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/integers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/library-functions.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/locale-specific-behavior.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/preprocessing-directives.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/qualifiers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/statements.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/structures-unions-enumerations-and-bit-fields.rst:
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            * doc/gcc/c-implementation-defined-behavior/translation.rst: New file.
            * doc/gcc/conditionally-supported-behavior.rst: New file.
            * doc/gcc/conf.py: New file.
            * doc/gcc/contributing-to-gcc-development.rst: New file.
            * doc/gcc/contributors-to-gcc.rst: New file.
            * doc/gcc/copyright.rst: New file.
            * doc/gcc/exception-handling.rst: New file.
            * doc/gcc/extensions-to-the-c++-language.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/backwards-compatibility.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/c++-concepts.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/c++-interface-and-implementation-pragmas.rst:
            New file.
            * doc/gcc/extensions-to-the-c++-language/c++-specific-variable-function-and-type-attributes.rst:
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            * doc/gcc/extensions-to-the-c++-language/deprecated-features.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/extracting-the-function-pointer-from-a-bound-pointer-to-member-function.rst:
            New file.
            * doc/gcc/extensions-to-the-c++-language/function-multiversioning.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/restricting-pointer-aliasing.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/type-traits.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/vague-linkage.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/when-is-a-volatile-c++-object-accessed.rst:
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            * doc/gcc/extensions-to-the-c++-language/wheres-the-template.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/128-bit-integers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/additional-floating-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/alternate-keywords.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/an-inline-function-is-as-fast-as-a-macro.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/arithmetic-on-void-and-function-pointers.rst:
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            * doc/gcc/extensions-to-the-c-language-family/arrays-of-length-zero.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/arrays-of-variable-length.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/attribute-syntax.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/binary-constants-using-the-0b-prefix.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/built-in-functions-for-memory-model-aware-atomic-operations.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/built-in-functions-to-perform-arithmetic-with-overflow-checking.rst:
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            * doc/gcc/extensions-to-the-c-language-family/c++-style-comments.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/case-ranges.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/cast-to-a-union-type.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/complex-numbers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/compound-literals.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/conditionals-with-omitted-operands.rst:
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            * doc/gcc/extensions-to-the-c-language-family/constructing-function-calls.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/decimal-floating-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/aarch64-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/amd-gcn-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/arc-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/arm-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/avr-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/blackfin-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/bpf-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/c-sky-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/common-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/epiphany-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/h8-300-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/ia-64-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32c-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32r-d-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m68k-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mcore-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mep-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microblaze-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microsoft-windows-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mips-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/msp430-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nds32-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nios-ii-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nvidia-ptx-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/powerpc-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/risc-v-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rl78-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rx-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/s-390-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/sh-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/symbian-os-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/v850-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/visium-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/x86-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/xstormy16-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/designated-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/determining-the-alignment-of-functions-types-or-variables.rst:
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            * doc/gcc/extensions-to-the-c-language-family/dollar-signs-in-identifier-names.rst:
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            * doc/gcc/extensions-to-the-c-language-family/double-word-integers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/enumerator-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/fixed-point-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/format-checks-specific-to-particular-target-machines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/function-names-as-strings.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/getting-the-return-or-frame-address-of-a-function.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/half-precision-floating-point.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/hex-floats.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/how-to-use-inline-assembly-language-in-c-code.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/incomplete-enum-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/label-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/labels-as-values.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/legacy-sync-built-in-functions-for-atomic-memory-access.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/locally-declared-labels.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/macros-with-a-variable-number-of-arguments.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/mixed-declarations-labels-and-code.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/named-address-spaces.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/nested-functions.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-constant-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-lvalue-arrays-may-have-subscripts.rst:
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            * doc/gcc/extensions-to-the-c-language-family/nonlocal-gotos.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/object-size-checking-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/other-built-in-functions-provided-by-gcc.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pointer-arguments-in-variadic-functions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/pointers-to-arrays-with-qualifiers-work-as-expected.rst:
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            * doc/gcc/extensions-to-the-c-language-family/pragmas-accepted-by-gcc.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/prototypes-and-old-style-function-definitions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/referring-to-a-type-with-typeof.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/slightly-looser-rules-for-escaped-newlines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-variables.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/statement-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/statements-and-declarations-in-expressions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/structures-with-no-members.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/support-for-offsetof.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/aarch64-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/alpha-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/altera-nios-ii-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arc-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arc-simd-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-armv8-m-security-extensions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-c-language-extensions-acle.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-floating-point-status-and-control-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-iwmmxt-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/avr-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/basic-powerpc-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/blackfin-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/bpf-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/fr-v-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-dsp-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-loongson-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-paired-single-support.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-simd-architecture-msa-support.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/msp430-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/nds32-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/other-mips-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/picochip-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-altivec-vsx-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-atomic-memory-operation-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-hardware-transactional-memory-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-matrix-multiply-assist-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/pru-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/risc-v-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/rx-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/s-390-system-z-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/sh-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/sparc-vis-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/ti-c6x-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-control-flow-protection-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-transactional-memory-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/the-character-esc-in-constants.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/thread-local-storage.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/unnamed-structure-and-union-fields.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/using-vector-instructions-through-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/when-is-a-volatile-object-accessed.rst:
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            * doc/gcc/extensions-to-the-c-language-family/x86-specific-memory-model-extensions-for-transactional-memory.rst:
            New file.
            * doc/gcc/funding.rst: New file.
            * doc/gcc/gcc-command-options.rst: New file.
            * doc/gcc/gcc-command-options/c++-modules.rst: New file.
            * doc/gcc/gcc-command-options/compiling-c++-programs.rst: New file.
            * doc/gcc/gcc-command-options/description.rst: New file.
            * doc/gcc/gcc-command-options/environment-variables-affecting-gcc.rst: New file.
            * doc/gcc/gcc-command-options/gcc-developer-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/aarch64-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/adapteva-epiphany-options.rst:
            New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/amd-gcn-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/arc-options.rst: New file.
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            * doc/gcc/gcc-command-options/machine-dependent-options/cris-options.rst: New file.
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            * doc/gcc/gcc-command-options/machine-dependent-options/dec-alpha-options.rst: New file.
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            * doc/gcc/gcc-command-options/machine-dependent-options/ft32-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/gnu-linux-options.rst: New file.
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            * doc/gcc/gcc-command-options/machine-dependent-options/hppa-options.rst: New file.
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            * doc/gcc/gcc-command-options/machine-dependent-options/ibm-rs-6000-and-powerpc-options.rst:
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            * doc/gcc/gcc-command-options/machine-dependent-options/m32r-d-options.rst: New file.
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            * doc/gcc/gcc-command-options/machine-dependent-options/openrisc-options.rst: New file.
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            * doc/gcc/gcc-command-options/machine-dependent-options/s-390-and-zseries-options.rst:
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            * doc/gcc/gcc-command-options/options-to-request-or-suppress-warnings.rst: New file.
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            * doc/gcc/gcc-command-options/using-precompiled-headers.rst: New file.
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            * doc/gcc/general-public-license-3.rst: New file.
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            * doc/gcc/gnu-objective-c-features.rst: New file.
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            * doc/gcc/gnu-objective-c-features/load-executing-code-before-main.rst: New file.
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            * doc/gcc/gnu.rst: New file.
            * doc/gcc/have-you-found-a-bug.rst: New file.
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            * doc/gccint/gimple/tuple-specific-accessors/gimplewithcleanupexpr.rst: New file.
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            * doc/gccint/introduction.rst: New file.
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            * doc/gccint/link-time-optimization/using-summary-information-in-ipa-passes.rst: New file.
            * doc/gccint/link-time-optimization/whole-program-assumptions-linker-plugin-and-symbol-visibilities.rst:
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            * doc/gccint/machine-descriptions/c-statements-for-assembler-output.rst: New file.
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            * doc/gccint/machine-descriptions/defining-jump-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/defining-looping-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/defining-rtl-sequences-for-code-generation.rst: New file.
            * doc/gccint/machine-descriptions/everything-about-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/example-of-defineinsn.rst: New file.
            * doc/gccint/machine-descriptions/including-patterns-in-machine-descriptions.rst: New file.
            * doc/gccint/machine-descriptions/instruction-attributes.rst: New file.
            * doc/gccint/machine-descriptions/interdependence-of-patterns.rst: New file.
            * doc/gccint/machine-descriptions/iterators.rst: New file.
            * doc/gccint/machine-descriptions/machine-specific-peephole-optimizers.rst: New file.
            * doc/gccint/machine-descriptions/operand-constraints.rst: New file.
            * doc/gccint/machine-descriptions/output-templates-and-operand-substitution.rst: New file.
            * doc/gccint/machine-descriptions/overview-of-how-the-machine-description-is-used.rst:
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            * doc/gccint/machine-descriptions/predicates.rst: New file.
            * doc/gccint/machine-descriptions/rtl-template.rst: New file.
            * doc/gccint/machine-descriptions/rtl-templates-transformations.rst: New file.
            * doc/gccint/machine-descriptions/standard-pattern-names-for-generation.rst: New file.
            * doc/gccint/machine-descriptions/when-the-order-of-patterns-matters.rst: New file.
            * doc/gccint/makefile-fragments.rst: New file.
            * doc/gccint/match-and-simplify.rst: New file.
            * doc/gccint/memory-management-and-type-information.rst: New file.
            * doc/gccint/memory-management-and-type-information/how-to-invoke-the-garbage-collector.rst:
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            * doc/gccint/memory-management-and-type-information/marking-roots-for-the-garbage-collector.rst:
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            * doc/gccint/memory-management-and-type-information/source-files-containing-type-information.rst:
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            * doc/gccint/memory-management-and-type-information/support-for-user-provided-gc-marking-routines.rst:
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            * doc/gccint/memory-management-and-type-information/the-inside-of-a-gty.rst: New file.
            * doc/gccint/memory-management-and-type-information/troubleshooting-the-garbage-collector.rst:
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            * doc/gccint/passes-and-files-of-the-compiler/gimplification-pass.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/inter-procedural-optimization-passes.rst:
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            * doc/gccint/passes-and-files-of-the-compiler/pass-manager.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/rtl-passes.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/tree-ssa-passes.rst: New file.
            * doc/gccint/plugins.rst: New file.
            * doc/gccint/plugins/building-gcc-plugins.rst: New file.
            * doc/gccint/plugins/controlling-which-passes-are-being-run.rst: New file.
            * doc/gccint/plugins/giving-information-about-a-plugin.rst: New file.
            * doc/gccint/plugins/interacting-with-the-gcc-garbage-collector.rst: New file.
            * doc/gccint/plugins/interacting-with-the-pass-manager.rst: New file.
            * doc/gccint/plugins/keeping-track-of-available-passes.rst: New file.
            * doc/gccint/plugins/loading-plugins.rst: New file.
            * doc/gccint/plugins/plugin-api.rst: New file.
            * doc/gccint/plugins/recording-information-about-pass-execution.rst: New file.
            * doc/gccint/plugins/registering-custom-attributes-or-pragmas.rst: New file.
            * doc/gccint/rtl-representation.rst: New file.
            * doc/gccint/rtl-representation/access-to-operands.rst: New file.
            * doc/gccint/rtl-representation/access-to-special-operands.rst: New file.
            * doc/gccint/rtl-representation/assembler-instructions-as-expressions.rst: New file.
            * doc/gccint/rtl-representation/bit-fields.rst: New file.
            * doc/gccint/rtl-representation/comparison-operations.rst: New file.
            * doc/gccint/rtl-representation/constant-expression-types.rst: New file.
            * doc/gccint/rtl-representation/conversions.rst: New file.
            * doc/gccint/rtl-representation/declarations.rst: New file.
            * doc/gccint/rtl-representation/embedded-side-effects-on-addresses.rst: New file.
            * doc/gccint/rtl-representation/flags-in-an-rtl-expression.rst: New file.
            * doc/gccint/rtl-representation/insns.rst: New file.
            * doc/gccint/rtl-representation/machine-modes.rst: New file.
            * doc/gccint/rtl-representation/on-the-side-ssa-form-for-rtl.rst: New file.
            * doc/gccint/rtl-representation/reading-rtl.rst: New file.
            * doc/gccint/rtl-representation/registers-and-memory.rst: New file.
            * doc/gccint/rtl-representation/rtl-classes-and-formats.rst: New file.
            * doc/gccint/rtl-representation/rtl-expressions-for-arithmetic.rst: New file.
            * doc/gccint/rtl-representation/rtl-object-types.rst: New file.
            * doc/gccint/rtl-representation/rtl-representation-of-function-call-insns.rst: New file.
            * doc/gccint/rtl-representation/side-effect-expressions.rst: New file.
            * doc/gccint/rtl-representation/structure-sharing-assumptions.rst: New file.
            * doc/gccint/rtl-representation/variable-location-debug-information-in-rtl.rst: New file.
            * doc/gccint/rtl-representation/vector-operations.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/alignment-of-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/arithmetic-on-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/comparisons-involving-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/computing-bounds-on-polyints.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/consequences-of-using-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/converting-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/guidelines-for-using-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/miscellaneous-polyint-routines.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/overview-of-polyint.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/configure-terms-and-history.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-language-front-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-target-back-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/build-system-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/building-documentation.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/configuration-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/headers-installed-by-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/library-source-files-and-headers-under-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/makefile-targets.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/subdirectories-of-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/top-level-source-directory.rst:
            New file.
            * doc/gccint/standard-header-file-directories.rst: New file.
            * doc/gccint/static-analyzer.rst: New file.
            * doc/gccint/target-macros.rst: New file.
            * doc/gccint/target-macros/adding-support-for-named-address-spaces.rst: New file.
            * doc/gccint/target-macros/addressing-modes.rst: New file.
            * doc/gccint/target-macros/adjusting-the-instruction-scheduler.rst: New file.
            * doc/gccint/target-macros/anchored-addresses.rst: New file.
            * doc/gccint/target-macros/c++-abi-parameters.rst: New file.
            * doc/gccint/target-macros/condition-code-status.rst: New file.
            * doc/gccint/target-macros/controlling-debugging-information-format.rst: New file.
            * doc/gccint/target-macros/controlling-the-compilation-driver-gcc.rst: New file.
            * doc/gccint/target-macros/cross-compilation-and-floating-point.rst: New file.
            * doc/gccint/target-macros/d-abi-parameters.rst: New file.
            * doc/gccint/target-macros/defining-coprocessor-specifics-for-mips-targets.rst: New file.
            * doc/gccint/target-macros/defining-data-structures-for-per-function-information.rst:
            New file.
            * doc/gccint/target-macros/defining-target-specific-uses-of-attribute.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-alignment.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-exception-regions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/how-initialization-functions-are-handled.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/macros-controlling-initialization-routines.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-and-generation-of-labels.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-assembler-instructions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-data.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-dispatch-tables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-uninitialized-variables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/the-overall-framework-of-an-assembler-file.rst:
            New file.
            * doc/gccint/target-macros/describing-relative-costs-of-operations.rst: New file.
            * doc/gccint/target-macros/dividing-the-output-into-sections-texts-data.rst: New file.
            * doc/gccint/target-macros/emulating-tls.rst: New file.
            * doc/gccint/target-macros/implementing-the-varargs-macros.rst: New file.
            * doc/gccint/target-macros/implicit-calls-to-library-routines.rst: New file.
            * doc/gccint/target-macros/layout-of-source-language-data-types.rst: New file.
            * doc/gccint/target-macros/miscellaneous-parameters.rst: New file.
            * doc/gccint/target-macros/mode-switching-instructions.rst: New file.
            * doc/gccint/target-macros/parameters-for-precompiled-header-validity-checking.rst:
            New file.
            * doc/gccint/target-macros/position-independent-code.rst: New file.
            * doc/gccint/target-macros/register-classes.rst: New file.
            * doc/gccint/target-macros/register-usage.rst: New file.
            * doc/gccint/target-macros/run-time-target-specification.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/basic-stack-layout.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/caller-saves-register-allocation.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/eliminating-frame-pointer-and-arg-pointer.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/exception-handling-support.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/function-entry-and-exit.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/generating-code-for-profiling.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-large-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-scalar-function-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/miscellaneous-register-hooks.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-arguments-in-registers.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-function-arguments-on-the-stack.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/permitting-tail-calls.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/registers-that-address-the-stack-frame.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/shrink-wrapping-separate-components.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/specifying-how-stack-checking-is-done.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/stack-smashing-protection.rst:
            New file.
            * doc/gccint/target-macros/storage-layout.rst: New file.
            * doc/gccint/target-macros/support-for-nested-functions.rst: New file.
            * doc/gccint/target-macros/the-global-targetm-variable.rst: New file.
            * doc/gccint/target-makefile-fragments.rst: New file.
            * doc/gccint/testsuites.rst: New test.
            * doc/gccint/testsuites/ada-language-testsuites.rst: New test.
            * doc/gccint/testsuites/c-language-testsuites.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/commands-for-use-in-dg-final.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/features-for-dg-add-options.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/keywords-describing-target-attributes.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/selecting-targets-to-which-a-test-applies.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/syntax-and-descriptions-of-test-directives.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/variants-of-dg-require-support.rst:
            New test.
            * doc/gccint/testsuites/idioms-used-in-testsuite-code.rst: New test.
            * doc/gccint/testsuites/support-for-testing-binary-compatibility.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gcov.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gimple-passes.rst: New test.
            * doc/gccint/testsuites/support-for-testing-link-time-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-profile-directed-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-rtl-passes.rst: New test.
            * doc/gccint/testsuites/support-for-torture-testing-using-multiple-options.rst: New test.
            * doc/gccint/the-gcc-low-level-runtime-library.rst: New file.
            * doc/gccint/the-gcc-low-level-runtime-library/language-independent-routines-for-exception-handling.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/miscellaneous-runtime-library-routines.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-decimal-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-fixed-point-fractional-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-integer-arithmetic.rst:
            New file.
            * doc/gccint/the-language.rst: New file.
            * doc/gccint/user-experience-guidelines.rst: New file.
            * doc/install/binaries.rst: New file.
            * doc/install/building.rst: New file.
            * doc/install/building/building-a-cross-compiler.rst: New file.
            * doc/install/building/building-a-native-compiler.rst: New file.
            * doc/install/building/building-in-parallel.rst: New file.
            * doc/install/building/building-the-ada-compiler.rst: New file.
            * doc/install/building/building-the-d-compiler.rst: New file.
            * doc/install/building/building-with-profile-feedback.rst: New file.
            * doc/install/conf.py: New file.
            * doc/install/configuration.rst: New file.
            * doc/install/copyright.rst: New file.
            * doc/install/downloading-gcc.rst: New file.
            * doc/install/final-installation.rst: New file.
            * doc/install/gnu-free-documentation-license.rst: New file.
            * doc/install/host-target-specific-installation-notes-for-gcc.rst: New file.
            * doc/install/how-can-you-run-the-testsuite-on-selected-tests.rst: New test.
            * doc/install/how-to-interpret-test-results.rst: New file.
            * doc/install/index.rst: New file.
            * doc/install/indices-and-tables.rst: New file.
            * doc/install/installing-gcc.rst: New file.
            * doc/install/passing-options-and-running-multiple-testsuites.rst: New test.
            * doc/install/prerequisites.rst: New file.
            * doc/install/submitting-test-results.rst: New file.
            * doc/install/testing.rst: New file.
    
    gcc/fortran/ChangeLog:
    
            * doc/gfc-internals/code-that-interacts-with-the-user.rst: New file.
            * doc/gfc-internals/command-line-options.rst: New file.
            * doc/gfc-internals/conf.py: New file.
            * doc/gfc-internals/copyright.rst: New file.
            * doc/gfc-internals/error-handling.rst: New file.
            * doc/gfc-internals/frontend-data-structures.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/accessing-declarations.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/basic-data-structures.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/converting-expressions-to-tree.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/translating-statements.rst:
            New file.
            * doc/gfc-internals/gfccode.rst: New file.
            * doc/gfc-internals/gfcexpr.rst: New file.
            * doc/gfc-internals/gnu-free-documentation-license.rst: New file.
            * doc/gfc-internals/index.rst: New file.
            * doc/gfc-internals/indices-and-tables.rst: New file.
            * doc/gfc-internals/internals-of-fortran-2003-oop-features.rst: New file.
            * doc/gfc-internals/introduction.rst: New file.
            * doc/gfc-internals/symbol-versioning.rst: New file.
            * doc/gfc-internals/the-libgfortran-runtime-library.rst: New file.
            * doc/gfc-internals/type-bound-operators.rst: New file.
            * doc/gfc-internals/type-bound-procedures.rst: New file.
            * doc/gfortran/about-gnu-fortran.rst: New file.
            * doc/gfortran/coarray-programming.rst: New file.
            * doc/gfortran/compiler-characteristics.rst: New file.
            * doc/gfortran/compiler-characteristics/asynchronous-i-o.rst: New file.
            * doc/gfortran/compiler-characteristics/data-consistency-and-durability.rst: New file.
            * doc/gfortran/compiler-characteristics/evaluation-of-logical-expressions.rst: New file.
            * doc/gfortran/compiler-characteristics/file-format-of-unformatted-sequential-files.rst:
            New file.
            * doc/gfortran/compiler-characteristics/file-operations-on-symbolic-links.rst: New file.
            * doc/gfortran/compiler-characteristics/files-opened-without-an-explicit-action=-specifier.rst:
            New file.
            * doc/gfortran/compiler-characteristics/internal-representation-of-logical-variables.rst:
            New file.
            * doc/gfortran/compiler-characteristics/kind-type-parameters.rst: New file.
            * doc/gfortran/compiler-characteristics/max-and-min-intrinsics-with-real-nan-arguments.rst:
            New file.
            * doc/gfortran/compiler-characteristics/thread-safety-of-the-runtime-library.rst: New file.
            * doc/gfortran/conf.py: New file.
            * doc/gfortran/contributing.rst: New file.
            * doc/gfortran/contributors-to-gnu-fortran.rst: New file.
            * doc/gfortran/copyright.rst: New file.
            * doc/gfortran/extensions-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions-not-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions.rst: New file.
            * doc/gfortran/function-abi-documentation.rst: New file.
            * doc/gfortran/funding.rst: New file.
            * doc/gfortran/general-public-license-3.rst: New file.
            * doc/gfortran/gnu-fortran-and-gcc.rst: New file.
            * doc/gfortran/gnu-fortran-command-options.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/description.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/enable-and-customize-preprocessing.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/environment-variables-affecting-gfortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-runtime-behavior.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-the-linking-step.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/option-summary.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-controlling-fortran-dialect.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-code-generation-conventions.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-debugging-your-program-or-gnu-fortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-directory-search.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-interoperability-with-other-languages.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-to-request-or-suppress-errors-and-warnings.rst:
            New file.
            * doc/gfortran/gnu-fortran-compiler-directives.rst: New file.
            * doc/gfortran/gnu-free-documentation-license.rst: New file.
            * doc/gfortran/index.rst: New file.
            * doc/gfortran/indices-and-tables.rst: New file.
            * doc/gfortran/interoperability-with-c.rst: New file.
            * doc/gfortran/intrinsic-modules.rst: New file.
            * doc/gfortran/intrinsic-modules/ieee-modules-ieeeexceptions-ieeearithmetic-and-ieeefeatures.rst:
            New file.
            * doc/gfortran/intrinsic-modules/isocbinding.rst: New file.
            * doc/gfortran/intrinsic-modules/isofortranenv.rst: New file.
            * doc/gfortran/intrinsic-modules/openacc-module-openacc.rst: New file.
            * doc/gfortran/intrinsic-modules/openmp-modules-omplib-and-omplibkinds.rst: New file.
            * doc/gfortran/intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/abort.rst: New file.
            * doc/gfortran/intrinsic-procedures/abs.rst: New file.
            * doc/gfortran/intrinsic-procedures/access.rst: New file.
            * doc/gfortran/intrinsic-procedures/achar.rst: New file.
            * doc/gfortran/intrinsic-procedures/acos.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustl.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustr.rst: New file.
            * doc/gfortran/intrinsic-procedures/aimag.rst: New file.
            * doc/gfortran/intrinsic-procedures/aint.rst: New file.
            * doc/gfortran/intrinsic-procedures/alarm.rst: New file.
            * doc/gfortran/intrinsic-procedures/all.rst: New file.
            * doc/gfortran/intrinsic-procedures/allocated.rst: New file.
            * doc/gfortran/intrinsic-procedures/and.rst: New file.
            * doc/gfortran/intrinsic-procedures/anint.rst: New file.
            * doc/gfortran/intrinsic-procedures/any.rst: New file.
            * doc/gfortran/intrinsic-procedures/asin.rst: New file.
            * doc/gfortran/intrinsic-procedures/asind.rst: New file.
            * doc/gfortran/intrinsic-procedures/asinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/associated.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2d.rst: New file.
            * doc/gfortran/intrinsic-procedures/atand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomiccas.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicdefine.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicref.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/backtrace.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj0.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besseljn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely0.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselyn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bge.rst: New file.
            * doc/gfortran/intrinsic-procedures/bgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/bitsize.rst: New file.
            * doc/gfortran/intrinsic-procedures/ble.rst: New file.
            * doc/gfortran/intrinsic-procedures/blt.rst: New file.
            * doc/gfortran/intrinsic-procedures/btest.rst: New file.
            * doc/gfortran/intrinsic-procedures/cassociated.rst: New file.
            * doc/gfortran/intrinsic-procedures/ceiling.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfprocpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfunloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/char.rst: New file.
            * doc/gfortran/intrinsic-procedures/chdir.rst: New file.
            * doc/gfortran/intrinsic-procedures/chmod.rst: New file.
            * doc/gfortran/intrinsic-procedures/cloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/cmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/cobroadcast.rst: New file.
            * doc/gfortran/intrinsic-procedures/comax.rst: New file.
            * doc/gfortran/intrinsic-procedures/comin.rst: New file.
            * doc/gfortran/intrinsic-procedures/commandargumentcount.rst: New file.
            * doc/gfortran/intrinsic-procedures/compileroptions.rst: New file.
            * doc/gfortran/intrinsic-procedures/compilerversion.rst: New file.
            * doc/gfortran/intrinsic-procedures/complex.rst: New file.
            * doc/gfortran/intrinsic-procedures/conjg.rst: New file.
            * doc/gfortran/intrinsic-procedures/coreduce.rst: New file.
            * doc/gfortran/intrinsic-procedures/cos.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosum.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotan.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotand.rst: New file.
            * doc/gfortran/intrinsic-procedures/count.rst: New file.
            * doc/gfortran/intrinsic-procedures/cputime.rst: New file.
            * doc/gfortran/intrinsic-procedures/cshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/csizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/ctime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dateandtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dble.rst: New file.
            * doc/gfortran/intrinsic-procedures/dcmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/digits.rst: New file.
            * doc/gfortran/intrinsic-procedures/dim.rst: New file.
            * doc/gfortran/intrinsic-procedures/dotproduct.rst: New file.
            * doc/gfortran/intrinsic-procedures/dprod.rst: New file.
            * doc/gfortran/intrinsic-procedures/dreal.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/dtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eoshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/epsilon.rst: New file.
            * doc/gfortran/intrinsic-procedures/erf.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfc.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfcscaled.rst: New file.
            * doc/gfortran/intrinsic-procedures/etime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eventquery.rst: New file.
            * doc/gfortran/intrinsic-procedures/executecommandline.rst: New file.
            * doc/gfortran/intrinsic-procedures/exit.rst: New file.
            * doc/gfortran/intrinsic-procedures/exp.rst: New file.
            * doc/gfortran/intrinsic-procedures/exponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/extendstypeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/fdate.rst: New file.
            * doc/gfortran/intrinsic-procedures/fget.rst: New file.
            * doc/gfortran/intrinsic-procedures/fgetc.rst: New file.
            * doc/gfortran/intrinsic-procedures/findloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/floor.rst: New file.
            * doc/gfortran/intrinsic-procedures/flush.rst: New file.
            * doc/gfortran/intrinsic-procedures/fnum.rst: New file.
            * doc/gfortran/intrinsic-procedures/fput.rst: New file.
            * doc/gfortran/intrinsic-procedures/fputc.rst: New file.
            * doc/gfortran/intrinsic-procedures/fraction.rst: New file.
            * doc/gfortran/intrinsic-procedures/free.rst: New file.
            * doc/gfortran/intrinsic-procedures/fseek.rst: New file.
            * doc/gfortran/intrinsic-procedures/fstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ftell.rst: New file.
            * doc/gfortran/intrinsic-procedures/gamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/gerror.rst: New file.
            * doc/gfortran/intrinsic-procedures/getarg.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommand.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommandargument.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcwd.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenv.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenvironmentvariable.rst: New file.
            * doc/gfortran/intrinsic-procedures/getgid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getlog.rst: New file.
            * doc/gfortran/intrinsic-procedures/getpid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getuid.rst: New file.
            * doc/gfortran/intrinsic-procedures/gmtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/hostnm.rst: New file.
            * doc/gfortran/intrinsic-procedures/huge.rst: New file.
            * doc/gfortran/intrinsic-procedures/hypot.rst: New file.
            * doc/gfortran/intrinsic-procedures/iachar.rst: New file.
            * doc/gfortran/intrinsic-procedures/iall.rst: New file.
            * doc/gfortran/intrinsic-procedures/iand.rst: New file.
            * doc/gfortran/intrinsic-procedures/iany.rst: New file.
            * doc/gfortran/intrinsic-procedures/iargc.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibclr.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibits.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibset.rst: New file.
            * doc/gfortran/intrinsic-procedures/ichar.rst: New file.
            * doc/gfortran/intrinsic-procedures/idate.rst: New file.
            * doc/gfortran/intrinsic-procedures/ieor.rst: New file.
            * doc/gfortran/intrinsic-procedures/ierrno.rst: New file.
            * doc/gfortran/intrinsic-procedures/imageindex.rst: New file.
            * doc/gfortran/intrinsic-procedures/index.rst: New file.
            * doc/gfortran/intrinsic-procedures/int.rst: New file.
            * doc/gfortran/intrinsic-procedures/int2.rst: New file.
            * doc/gfortran/intrinsic-procedures/int8.rst: New file.
            * doc/gfortran/intrinsic-procedures/introduction-to-intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/ior.rst: New file.
            * doc/gfortran/intrinsic-procedures/iparity.rst: New file.
            * doc/gfortran/intrinsic-procedures/irand.rst: New file.
            * doc/gfortran/intrinsic-procedures/isatty.rst: New file.
            * doc/gfortran/intrinsic-procedures/iscontiguous.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishft.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishftc.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostatend.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostateor.rst: New file.
            * doc/gfortran/intrinsic-procedures/isnan.rst: New file.
            * doc/gfortran/intrinsic-procedures/itime.rst: New file.
            * doc/gfortran/intrinsic-procedures/kill.rst: New file.
            * doc/gfortran/intrinsic-procedures/kind.rst: New file.
            * doc/gfortran/intrinsic-procedures/lbound.rst: New file.
            * doc/gfortran/intrinsic-procedures/lcobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/leadz.rst: New file.
            * doc/gfortran/intrinsic-procedures/len.rst: New file.
            * doc/gfortran/intrinsic-procedures/lentrim.rst: New file.
            * doc/gfortran/intrinsic-procedures/lge.rst: New file.
            * doc/gfortran/intrinsic-procedures/lgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/link.rst: New file.
            * doc/gfortran/intrinsic-procedures/lle.rst: New file.
            * doc/gfortran/intrinsic-procedures/llt.rst: New file.
            * doc/gfortran/intrinsic-procedures/lnblnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/loc.rst: New file.
            * doc/gfortran/intrinsic-procedures/log.rst: New file.
            * doc/gfortran/intrinsic-procedures/log10.rst: New file.
            * doc/gfortran/intrinsic-procedures/loggamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/logical.rst: New file.
            * doc/gfortran/intrinsic-procedures/lshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/lstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ltime.rst: New file.
            * doc/gfortran/intrinsic-procedures/malloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskl.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskr.rst: New file.
            * doc/gfortran/intrinsic-procedures/matmul.rst: New file.
            * doc/gfortran/intrinsic-procedures/max.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock8.rst: New file.
            * doc/gfortran/intrinsic-procedures/merge.rst: New file.
            * doc/gfortran/intrinsic-procedures/mergebits.rst: New file.
            * doc/gfortran/intrinsic-procedures/min.rst: New file.
            * doc/gfortran/intrinsic-procedures/minexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/minloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/minval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mod.rst: New file.
            * doc/gfortran/intrinsic-procedures/modulo.rst: New file.
            * doc/gfortran/intrinsic-procedures/movealloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/mvbits.rst: New file.
            * doc/gfortran/intrinsic-procedures/nearest.rst: New file.
            * doc/gfortran/intrinsic-procedures/newline.rst: New file.
            * doc/gfortran/intrinsic-procedures/nint.rst: New file.
            * doc/gfortran/intrinsic-procedures/norm2.rst: New file.
            * doc/gfortran/intrinsic-procedures/not.rst: New file.
            * doc/gfortran/intrinsic-procedures/null.rst: New file.
            * doc/gfortran/intrinsic-procedures/numimages.rst: New file.
            * doc/gfortran/intrinsic-procedures/or.rst: New file.
            * doc/gfortran/intrinsic-procedures/pack.rst: New file.
            * doc/gfortran/intrinsic-procedures/parity.rst: New file.
            * doc/gfortran/intrinsic-procedures/perror.rst: New file.
            * doc/gfortran/intrinsic-procedures/popcnt.rst: New file.
            * doc/gfortran/intrinsic-procedures/poppar.rst: New file.
            * doc/gfortran/intrinsic-procedures/precision.rst: New file.
            * doc/gfortran/intrinsic-procedures/present.rst: New file.
            * doc/gfortran/intrinsic-procedures/product.rst: New file.
            * doc/gfortran/intrinsic-procedures/radix.rst: New file.
            * doc/gfortran/intrinsic-procedures/ran.rst: New file.
            * doc/gfortran/intrinsic-procedures/rand.rst: New file.
            * doc/gfortran/intrinsic-procedures/randominit.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomnumber.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomseed.rst: New file.
            * doc/gfortran/intrinsic-procedures/range.rst: New file.
            * doc/gfortran/intrinsic-procedures/rank.rst: New file.
            * doc/gfortran/intrinsic-procedures/real.rst: New file.
            * doc/gfortran/intrinsic-procedures/rename.rst: New file.
            * doc/gfortran/intrinsic-procedures/repeat.rst: New file.
            * doc/gfortran/intrinsic-procedures/reshape.rst: New file.
            * doc/gfortran/intrinsic-procedures/rrspacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/rshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/sametypeas.rst: New file.
            * doc/gfortran/intrinsic-procedures/scale.rst: New file.
            * doc/gfortran/intrinsic-procedures/scan.rst: New file.
            * doc/gfortran/intrinsic-procedures/secnds.rst: New file.
            * doc/gfortran/intrinsic-procedures/second.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedcharkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedintkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedrealkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/setexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/shape.rst: New file.
            * doc/gfortran/intrinsic-procedures/shifta.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/sign.rst: New file.
            * doc/gfortran/intrinsic-procedures/signal.rst: New file.
            * doc/gfortran/intrinsic-procedures/sin.rst: New file.
            * doc/gfortran/intrinsic-procedures/sind.rst: New file.
            * doc/gfortran/intrinsic-procedures/sinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/size.rst: New file.
            * doc/gfortran/intrinsic-procedures/sizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/sleep.rst: New file.
            * doc/gfortran/intrinsic-procedures/spacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/spread.rst: New file.
            * doc/gfortran/intrinsic-procedures/sqrt.rst: New file.
            * doc/gfortran/intrinsic-procedures/srand.rst: New file.
            * doc/gfortran/intrinsic-procedures/stat.rst: New file.
            * doc/gfortran/intrinsic-procedures/storagesize.rst: New file.
            * doc/gfortran/intrinsic-procedures/sum.rst: New file.
            * doc/gfortran/intrinsic-procedures/symlnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/system.rst: New file.
            * doc/gfortran/intrinsic-procedures/systemclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/tan.rst: New file.
            * doc/gfortran/intrinsic-procedures/tand.rst: New file.
            * doc/gfortran/intrinsic-procedures/tanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/thisimage.rst: New file.
            * doc/gfortran/intrinsic-procedures/time.rst: New file.
            * doc/gfortran/intrinsic-procedures/time8.rst: New file.
            * doc/gfortran/intrinsic-procedures/tiny.rst: New file.
            * doc/gfortran/intrinsic-procedures/trailz.rst: New file.
            * doc/gfortran/intrinsic-procedures/transfer.rst: New file.
            * doc/gfortran/intrinsic-procedures/transpose.rst: New file.
            * doc/gfortran/intrinsic-procedures/trim.rst: New file.
            * doc/gfortran/intrinsic-procedures/ttynam.rst: New file.
            * doc/gfortran/intrinsic-procedures/ubound.rst: New file.
            * doc/gfortran/intrinsic-procedures/ucobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/umask.rst: New file.
            * doc/gfortran/intrinsic-procedures/unlink.rst: New file.
            * doc/gfortran/intrinsic-procedures/unpack.rst: New file.
            * doc/gfortran/intrinsic-procedures/verify.rst: New file.
            * doc/gfortran/intrinsic-procedures/xor.rst: New file.
            * doc/gfortran/introduction.rst: New file.
            * doc/gfortran/mixed-language-programming.rst: New file.
            * doc/gfortran/naming-and-argument-passing-conventions.rst: New file.
            * doc/gfortran/non-fortran-main-program.rst: New file.
            * doc/gfortran/projects.rst: New file.
            * doc/gfortran/runtime.rst: New file.
            * doc/gfortran/runtime/gfortranconvertunit.rst: New file.
            * doc/gfortran/runtime/gfortranerrorbacktrace.rst: New file.
            * doc/gfortran/runtime/gfortranformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/gfortranlistseparator.rst: New file.
            * doc/gfortran/runtime/gfortranoptionalplus.rst: New file.
            * doc/gfortran/runtime/gfortranshowlocus.rst: New file.
            * doc/gfortran/runtime/gfortranstderrunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdinunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdoutunit.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedall.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedpreconnected.rst: New file.
            * doc/gfortran/runtime/gfortranunformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/tmpdir.rst: New file.
            * doc/gfortran/standards.rst: New file.
            * doc/gfortran/type-and-enum-abi-documentation.rst: New file.
    
    gcc/go/ChangeLog:
    
            * doc/c-interoperability.rst: New file.
            * doc/c-type-interoperability.rst: New file.
            * doc/compiler-directives.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/function-names.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/import-and-export.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/invoking-gccgo.rst: New file.
    
    libgomp/ChangeLog:
    
            * doc/amd-radeon-gcn.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/cuda-streams-usage.rst: New file.
            * doc/enabling-openacc.rst: New file.
            * doc/enabling-openmp.rst: New file.
            * doc/first-invocation-nvidia-cublas-library-api.rst: New file.
            * doc/first-invocation-openacc-library-api.rst: New file.
            * doc/funding.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/implementation-status-and-implementation-defined-behavior.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/memory-allocation-with-libmemkind.rst: New file.
            * doc/nvptx.rst: New file.
            * doc/offload-target-specifics.rst: New file.
            * doc/openacc-environment-variables.rst: New file.
            * doc/openacc-environment-variables/accdevicenum.rst: New file.
            * doc/openacc-environment-variables/accdevicetype.rst: New file.
            * doc/openacc-environment-variables/accproflib.rst: New file.
            * doc/openacc-environment-variables/gccaccnotify.rst: New file.
            * doc/openacc-introduction.rst: New file.
            * doc/openacc-library-and-environment-variables.rst: New file.
            * doc/openacc-library-interoperability.rst: New file.
            * doc/openacc-profiling-interface.rst: New file.
            * doc/openacc-runtime-library-routines.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctest.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctestall.rst: New file.
            * doc/openacc-runtime-library-routines/accattach.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyin.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyout.rst: New file.
            * doc/openacc-runtime-library-routines/acccreate.rst: New file.
            * doc/openacc-runtime-library-routines/accdelete.rst: New file.
            * doc/openacc-runtime-library-routines/accdetach.rst: New file.
            * doc/openacc-runtime-library-routines/accdeviceptr.rst: New file.
            * doc/openacc-runtime-library-routines/accfree.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudacontext.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudadevice.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accgetnumdevices.rst: New file.
            * doc/openacc-runtime-library-routines/accgetproperty.rst: New file.
            * doc/openacc-runtime-library-routines/acchostptr.rst: New file.
            * doc/openacc-runtime-library-routines/accinit.rst: New file.
            * doc/openacc-runtime-library-routines/accispresent.rst: New file.
            * doc/openacc-runtime-library-routines/accmalloc.rst: New file.
            * doc/openacc-runtime-library-routines/accmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpyfromdevice.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpytodevice.rst: New file.
            * doc/openacc-runtime-library-routines/accondevice.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcopyin.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcreate.rst: New file.
            * doc/openacc-runtime-library-routines/accproflookup.rst: New file.
            * doc/openacc-runtime-library-routines/accprofregister.rst: New file.
            * doc/openacc-runtime-library-routines/accprofunregister.rst: New file.
            * doc/openacc-runtime-library-routines/accregisterlibrary.rst: New file.
            * doc/openacc-runtime-library-routines/accsetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accshutdown.rst: New file.
            * doc/openacc-runtime-library-routines/accunmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accupdatedevice.rst: New file.
            * doc/openacc-runtime-library-routines/accupdateself.rst: New file.
            * doc/openacc-runtime-library-routines/accwait.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitall.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitallasync.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitasync.rst: New file.
            * doc/openmp-context-selectors.rst: New file.
            * doc/openmp-environment-variables.rst: New file.
            * doc/openmp-environment-variables/gompcpuaffinity.rst: New file.
            * doc/openmp-environment-variables/gompdebug.rst: New file.
            * doc/openmp-environment-variables/gomprtemsthreadpools.rst: New file.
            * doc/openmp-environment-variables/gompspincount.rst: New file.
            * doc/openmp-environment-variables/gompstacksize.rst: New file.
            * doc/openmp-environment-variables/ompcancellation.rst: New file.
            * doc/openmp-environment-variables/ompdefaultdevice.rst: New file.
            * doc/openmp-environment-variables/ompdisplayenv.rst: New file.
            * doc/openmp-environment-variables/ompdynamic.rst: New file.
            * doc/openmp-environment-variables/ompmaxactivelevels.rst: New file.
            * doc/openmp-environment-variables/ompmaxtaskpriority.rst: New file.
            * doc/openmp-environment-variables/ompnested.rst: New file.
            * doc/openmp-environment-variables/ompnumteams.rst: New file.
            * doc/openmp-environment-variables/ompnumthreads.rst: New file.
            * doc/openmp-environment-variables/ompplaces.rst: New file.
            * doc/openmp-environment-variables/ompprocbind.rst: New file.
            * doc/openmp-environment-variables/ompschedule.rst: New file.
            * doc/openmp-environment-variables/ompstacksize.rst: New file.
            * doc/openmp-environment-variables/omptargetoffload.rst: New file.
            * doc/openmp-environment-variables/ompteamsthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompwaitpolicy.rst: New file.
            * doc/openmp-implementation-specifics.rst: New file.
            * doc/openmp-implementation-status.rst: New file.
            * doc/openmp-implementation-status/openmp-45.rst: New file.
            * doc/openmp-implementation-status/openmp-50.rst: New file.
            * doc/openmp-implementation-status/openmp-51.rst: New file.
            * doc/openmp-implementation-status/openmp-52.rst: New file.
            * doc/openmp-runtime-library-routines.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroylock.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroynestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompfulfillevent.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetactivelevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetancestorthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetcancellation.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdevicenum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetlevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxtaskpriority.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumdevices.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumprocs.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetprocbind.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetsupportedactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsize.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtick.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtime.rst: New file.
            * doc/openmp-runtime-library-routines/ompinfinal.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinparallel.rst: New file.
            * doc/openmp-runtime-library-routines/ompisinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/omptestlock.rst: New file.
            * doc/openmp-runtime-library-routines/omptestnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetnestlock.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/the-libgomp-abi.rst: New file.
            * doc/the-libgomp-abi/implementing-atomic-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-barrier-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-critical-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-firstprivate-lastprivate-copyin-and-copyprivate-clauses.rst:
            New file.
            * doc/the-libgomp-abi/implementing-flush-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-for-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-master-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-openaccs-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-ordered-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-private-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-reduction-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-sections-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-single-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-threadprivate-construct.rst: New file.
    
    libiberty/ChangeLog:
    
            * doc/bsd.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/extensions.rst: New file.
            * doc/function-variable-and-macro-listing.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/lesser-general-public-license-2.1.rst: New file.
            * doc/overview.rst: New file.
            * doc/replacement-functions.rst: New file.
            * doc/supplemental-functions.rst: New file.
            * doc/using.rst: New file.
    
    libitm/ChangeLog:
    
            * doc/c-c++-language-constructs-for-tm.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/enabling-libitm.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/internals.rst: New file.
            * doc/locking-conventions.rst: New file.
            * doc/nesting-flat-vs-closed.rst: New file.
            * doc/the-libitm-abi.rst: New file.
            * doc/the-libitm-abi/function-list.rst: New file.
            * doc/the-libitm-abi/future-enhancements-to-the-abi.rst: New file.
            * doc/the-libitm-abi/library-design-principles.rst: New file.
            * doc/the-libitm-abi/memory-model.rst: New file.
            * doc/the-libitm-abi/non-objectives.rst: New file.
            * doc/the-libitm-abi/objectives.rst: New file.
            * doc/the-libitm-abi/sample-code.rst: New file.
            * doc/the-libitm-abi/types-and-macros-list.rst: New file.
            * doc/tm-methods-and-method-groups.rst: New file.
    
    libquadmath/ChangeLog:
    
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/i-o-library-routines.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/math-library-routines.rst: New file.
            * doc/quadmathsnprintf.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/strtoflt128.rst: New file.
            * doc/typedef-and-constants.rst: New file.

Diff:
---
 doc/Makefile                                       |   97 +
 doc/_static/custom.css                             |   11 +
 doc/baseconf.py                                    |  230 +
 doc/bsd.rst                                        |   39 +
 doc/contrib.rst                                    | 1273 +++++
 doc/contribute.rst                                 |   21 +
 doc/cppdiropts.rst                                 |  217 +
 doc/cppenv.rst                                     |   97 +
 doc/cppopts.rst                                    |  556 +++
 doc/cppwarnopts.rst                                |    4 +
 doc/favicon.ico                                    |  Bin 0 -> 766 bytes
 doc/funding.rst                                    |   47 +
 doc/gcc_sphinx.py                                  |   44 +
 doc/gnu.rst                                        |   19 +
 doc/gnu_free_documentation_license.rst             |  476 ++
 doc/gpl-3.0.rst                                    |  707 +++
 doc/indices-and-tables.rst                         |   13 +
 doc/lgpl-2.1.rst                                   |  514 +++
 doc/logo.pdf                                       |  Bin 0 -> 8978 bytes
 doc/logo.svg                                       |  108 +
 doc/md.rst                                         | 3142 +++++++++++++
 doc/requirements.txt                               |    3 +
 gcc/d/doc/conf.py                                  |   30 +
 gcc/d/doc/copyright.rst                            |   13 +
 gcc/d/doc/general-public-license-3.rst             |    6 +
 gcc/d/doc/gnu-free-documentation-license.rst       |    6 +
 gcc/d/doc/index.rst                                |   22 +
 gcc/d/doc/indices-and-tables.rst                   |    1 +
 gcc/d/doc/invoking-gdc.rst                         |   48 +
 gcc/d/doc/invoking-gdc/code-generation.rst         |  170 +
 gcc/d/doc/invoking-gdc/developer-options.rst       |   31 +
 gcc/d/doc/invoking-gdc/input-and-output-files.rst  |   45 +
 .../invoking-gdc/options-for-directory-search.rst  |   92 +
 gcc/d/doc/invoking-gdc/options-for-linking.rst     |   59 +
 gcc/d/doc/invoking-gdc/runtime-options.rst         |  314 ++
 gcc/d/doc/invoking-gdc/warnings.rst                |  148 +
 gcc/doc/cpp/character-sets.rst                     |   56 +
 gcc/doc/cpp/conditional-syntax.rst                 |  411 ++
 gcc/doc/cpp/conditional-uses.rst                   |   32 +
 gcc/doc/cpp/conditionals.rst                       |   44 +
 gcc/doc/cpp/conf.py                                |   30 +
 gcc/doc/cpp/copyright.rst                          |   24 +
 gcc/doc/cpp/deleted-code.rst                       |   34 +
 gcc/doc/cpp/diagnostics.rst                        |   51 +
 gcc/doc/cpp/environment-variables.rst              |   23 +
 gcc/doc/cpp/gnu-free-documentation-license.rst     |    6 +
 gcc/doc/cpp/header-files.rst                       |   56 +
 .../alternatives-to-wrapper-ifndef.rst             |   40 +
 gcc/doc/cpp/header-files/computed-includes.rst     |   86 +
 gcc/doc/cpp/header-files/include-operation.rst     |   67 +
 gcc/doc/cpp/header-files/include-syntax.rst        |   42 +
 gcc/doc/cpp/header-files/once-only-headers.rst     |   52 +
 gcc/doc/cpp/header-files/search-path.rst           |   53 +
 gcc/doc/cpp/header-files/system-headers.rst        |   41 +
 gcc/doc/cpp/header-files/wrapper-headers.rst       |   58 +
 gcc/doc/cpp/implementation-defined-behavior.rst    |   97 +
 gcc/doc/cpp/implementation-details.rst             |   23 +
 gcc/doc/cpp/implementation-limits.rst              |   68 +
 gcc/doc/cpp/index.rst                              |   35 +
 gcc/doc/cpp/indices-and-tables.rst                 |    1 +
 gcc/doc/cpp/initial-processing.rst                 |  164 +
 gcc/doc/cpp/invocation.rst                         |   81 +
 gcc/doc/cpp/line-control.rst                       |   55 +
 gcc/doc/cpp/macros.rst                             |   37 +
 gcc/doc/cpp/macros/concatenation.rst               |   85 +
 .../macros/directives-within-macro-arguments.rst   |   39 +
 gcc/doc/cpp/macros/function-like-macros.rst        |   55 +
 gcc/doc/cpp/macros/macro-arguments.rst             |  112 +
 gcc/doc/cpp/macros/macro-pitfalls.rst              |  449 ++
 gcc/doc/cpp/macros/object-like-macros.rst          |  126 +
 gcc/doc/cpp/macros/predefined-macros.rst           |  874 ++++
 gcc/doc/cpp/macros/stringizing.rst                 |   86 +
 .../macros/undefining-and-redefining-macros.rst    |   67 +
 gcc/doc/cpp/macros/variadic-macros.rst             |  141 +
 gcc/doc/cpp/obsolete-features.rst                  |   98 +
 gcc/doc/cpp/other-directives.rst                   |   30 +
 gcc/doc/cpp/overview.rst                           |   67 +
 gcc/doc/cpp/pragmas.rst                            |  121 +
 gcc/doc/cpp/preprocessor-output.rst                |   86 +
 gcc/doc/cpp/the-preprocessing-language.rst         |   69 +
 gcc/doc/cpp/tokenization.rst                       |  168 +
 gcc/doc/cpp/traditional-lexical-analysis.rst       |   74 +
 gcc/doc/cpp/traditional-macros.rst                 |   99 +
 gcc/doc/cpp/traditional-miscellany.rst             |   30 +
 gcc/doc/cpp/traditional-mode.rst                   |   35 +
 gcc/doc/cpp/traditional-warnings.rst               |   49 +
 gcc/doc/cppinternals/conf.py                       |   24 +
 gcc/doc/cppinternals/copyright.rst                 |   19 +
 gcc/doc/cppinternals/cppinternals.rst              |  284 ++
 gcc/doc/cppinternals/cpplib.rst                    |   29 +
 gcc/doc/cppinternals/files.rst                     |   70 +
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 gcc/doc/cppinternals/indices-and-tables.rst        |    1 +
 .../internal-representation-of-macros.rst          |   27 +
 .../cppinternals/just-which-line-number-anyway.rst |   62 +
 gcc/doc/cppinternals/lexing-a-line.rst             |   91 +
 gcc/doc/cppinternals/lexing-a-token.rst            |  177 +
 ...-a-function-like-macros-opening-parenthesis.rst |   24 +
 gcc/doc/cppinternals/macro-expansion-overview.rst  |   51 +
 ...king-tokens-ineligible-for-future-expansion.rst |   24 +
 .../cppinternals/multiple-include-optimization.rst |  117 +
 gcc/doc/cppinternals/overview.rst                  |   24 +
 .../representation-of-line-numbers.rst             |   32 +
 ...g-the-replacement-list-for-macros-to-expand.rst |   57 +
 gcc/doc/gcc/binary-compatibility.rst               |  151 +
 .../gcc/c++-implementation-defined-behavior.rst    |   33 +
 gcc/doc/gcc/c-implementation-defined-behavior.rst  |   46 +
 .../architecture.rst                               |   47 +
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 .../characters.rst                                 |   93 +
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 .../qualifiers.rst                                 |   53 +
 .../statements.rst                                 |   14 +
 ...ructures-unions-enumerations-and-bit-fields.rst |   78 +
 .../translation.rst                                |   20 +
 gcc/doc/gcc/conditionally-supported-behavior.rst   |   20 +
 gcc/doc/gcc/conf.py                                |   37 +
 gcc/doc/gcc/contributing-to-gcc-development.rst    |    6 +
 gcc/doc/gcc/contributors-to-gcc.rst                |    6 +
 gcc/doc/gcc/copyright.rst                          |   25 +
 gcc/doc/gcc/exception-handling.rst                 |   15 +
 gcc/doc/gcc/extensions-to-the-c++-language.rst     |   34 +
 .../backwards-compatibility.rst                    |   27 +
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 .../c++-interface-and-implementation-pragmas.rst   |   97 +
 ...cific-variable-function-and-type-attributes.rst |   95 +
 .../deprecated-features.rst                        |   43 +
 ...ter-from-a-bound-pointer-to-member-function.rst |   48 +
 .../function-multiversioning.rst                   |   65 +
 .../restricting-pointer-aliasing.rst               |   52 +
 .../extensions-to-the-c++-language/type-traits.rst |  165 +
 .../vague-linkage.rst                              |   80 +
 .../when-is-a-volatile-c++-object-accessed.rst     |   58 +
 .../wheres-the-template.rst                        |  131 +
 .../gcc/extensions-to-the-c-language-family.rst    |   92 +
 .../128-bit-integers.rst                           |   18 +
 .../additional-floating-types.rst                  |   83 +
 .../alternate-keywords.rst                         |   46 +
 .../an-inline-function-is-as-fast-as-a-macro.rst   |  126 +
 .../arithmetic-on-void-and-function-pointers.rst   |   23 +
 .../arrays-of-length-zero.rst                      |  111 +
 .../arrays-of-variable-length.rst                  |   99 +
 .../attribute-syntax.rst                           |  259 ++
 .../binary-constants-using-the-0b-prefix.rst       |   29 +
 ...ns-for-memory-model-aware-atomic-operations.rst |  290 ++
 ...o-perform-arithmetic-with-overflow-checking.rst |  102 +
 .../c++-style-comments.rst                         |   18 +
 .../case-ranges.rst                                |   43 +
 .../cast-to-a-union-type.rst                       |   69 +
 .../complex-numbers.rst                            |  122 +
 .../compound-literals.rst                          |  104 +
 .../conditionals-with-omitted-operands.rst         |   39 +
 .../constructing-function-calls.rst                |  125 +
 .../decimal-floating-types.rst                     |   47 +
 .../declaring-attributes-of-functions.rst          |  109 +
 .../aarch64-function-attributes.rst                |  192 +
 .../amd-gcn-function-attributes.rst                |   93 +
 .../arc-function-attributes.rst                    |   88 +
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 .../avr-function-attributes.rst                    |  120 +
 .../blackfin-function-attributes.rst               |   91 +
 .../bpf-function-attributes.rst                    |   24 +
 .../c-sky-function-attributes.rst                  |   37 +
 .../common-function-attributes.rst                 | 1891 ++++++++
 .../epiphany-function-attributes.rst               |   82 +
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 .../ia-64-function-attributes.rst                  |   36 +
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 .../msp430-function-attributes.rst                 |  103 +
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 .../nvidia-ptx-function-attributes.rst             |   22 +
 .../powerpc-function-attributes.rst                |  225 +
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 .../v850-function-attributes.rst                   |   20 +
 .../visium-function-attributes.rst                 |   22 +
 .../x86-function-attributes.rst                    | 1020 ++++
 .../xstormy16-function-attributes.rst              |   20 +
 .../designated-initializers.rst                    |  147 +
 ...e-alignment-of-functions-types-or-variables.rst |   44 +
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 ...ecks-specific-to-particular-target-machines.rst |   47 +
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 .../half-precision-floating-point.rst              |   76 +
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 ...w-to-use-inline-assembly-language-in-c-code.rst | 1979 ++++++++
 .../incomplete-enum-types.rst                      |   23 +
 .../label-attributes.rst                           |   65 +
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 ...built-in-functions-for-atomic-memory-access.rst |  171 +
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 .../non-lvalue-arrays-may-have-subscripts.rst      |   30 +
 .../nonlocal-gotos.rst                             |   62 +
 .../object-size-checking-built-in-functions.rst    |  145 +
 .../other-built-in-functions-provided-by-gcc.rst   | 1245 +++++
 .../pointer-arguments-in-variadic-functions.rst    |   22 +
 ...-to-arrays-with-qualifiers-work-as-expected.rst |   27 +
 .../pragmas-accepted-by-gcc.rst                    |  729 +++
 ...ototypes-and-old-style-function-definitions.rst |   63 +
 .../referring-to-a-type-with-typeof.rst            |  137 +
 .../slightly-looser-rules-for-escaped-newlines.rst |   23 +
 .../specifying-attributes-of-types.rst             |  713 +++
 .../specifying-attributes-of-variables.rst         | 1187 +++++
 .../statement-attributes.rst                       |   71 +
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 .../altera-nios-ii-built-in-functions.rst          |  118 +
 .../target-builtins/arc-built-in-functions.rst     |  233 +
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 .../arm-c-language-extensions-acle.rst             |   30 +
 ...loating-point-status-and-control-intrinsics.rst |   17 +
 .../arm-iwmmxt-built-in-functions.rst              |  159 +
 .../target-builtins/avr-built-in-functions.rst     |  114 +
 .../basic-powerpc-built-in-functions.rst           |  724 +++
 .../blackfin-built-in-functions.rst                |   20 +
 .../target-builtins/bpf-built-in-functions.rst     |  100 +
 .../target-builtins/fr-v-built-in-functions.rst    |  474 ++
 .../mips-dsp-built-in-functions.rst                |  312 ++
 .../mips-loongson-built-in-functions.rst           |  447 ++
 .../target-builtins/mips-paired-single-support.rst |   45 +
 .../mips-simd-architecture-msa-support.rst         |  812 ++++
 .../target-builtins/msp430-built-in-functions.rst  |   36 +
 .../target-builtins/nds32-built-in-functions.rst   |   44 +
 .../other-mips-built-in-functions.rst              |   27 +
 .../picochip-built-in-functions.rst                |   45 +
 .../powerpc-altivec-vsx-built-in-functions.rst     | 2181 +++++++++
 .../powerpc-atomic-memory-operation-functions.rst  |   68 +
 ...are-transactional-memory-built-in-functions.rst |  226 +
 ...c-matrix-multiply-assist-built-in-functions.rst |  104 +
 .../target-builtins/pru-built-in-functions.rst     |   34 +
 .../target-builtins/risc-v-built-in-functions.rst  |   16 +
 .../target-builtins/rx-built-in-functions.rst      |  122 +
 .../s-390-system-z-built-in-functions.rst          |  121 +
 .../target-builtins/sh-built-in-functions.rst      |   50 +
 .../sparc-vis-built-in-functions.rst               |  226 +
 .../target-builtins/ti-c6x-built-in-functions.rst  |   43 +
 .../target-builtins/x86-built-in-functions.rst     | 1698 +++++++
 .../x86-control-flow-protection-intrinsics.rst     |   50 +
 .../x86-transactional-memory-intrinsics.rst        |  102 +
 .../the-character-esc-in-constants.rst             |   12 +
 .../thread-local-storage.rst                       |  219 +
 .../unnamed-structure-and-union-fields.rst         |   86 +
 ...tor-instructions-through-built-in-functions.rst |  285 ++
 .../when-is-a-volatile-object-accessed.rst         |   86 +
 ...y-model-extensions-for-transactional-memory.rst |   38 +
 gcc/doc/gcc/funding.rst                            |    6 +
 gcc/doc/gcc/gcc-command-options.rst                |   67 +
 gcc/doc/gcc/gcc-command-options/c++-modules.rst    |  352 ++
 .../gcc-command-options/compiling-c++-programs.rst |   42 +
 gcc/doc/gcc/gcc-command-options/description.rst    |   73 +
 .../environment-variables-affecting-gcc.rst        |  163 +
 .../gcc-command-options/gcc-developer-options.rst  | 1174 +++++
 .../machine-dependent-options.rst                  |   92 +
 .../machine-dependent-options/aarch64-options.rst  |  550 +++
 .../adapteva-epiphany-options.rst                  |  163 +
 .../machine-dependent-options/amd-gcn-options.rst  |   58 +
 .../machine-dependent-options/arc-options.rst      |  759 +++
 .../machine-dependent-options/arm-options.rst      | 1037 +++++
 .../machine-dependent-options/avr-mmcu.rst         |   97 +
 .../machine-dependent-options/avr-options.rst      |  543 +++
 .../machine-dependent-options/blackfin-options.rst |  227 +
 .../machine-dependent-options/c-sky-options.rst    |  193 +
 .../machine-dependent-options/c6x-options.rst      |   55 +
 .../machine-dependent-options/cris-options.rst     |  102 +
 .../machine-dependent-options/darwin-options.rst   |  224 +
 .../dec-alpha-options.rst                          |  274 ++
 .../machine-dependent-options/ebpf-options.rst     |   94 +
 .../machine-dependent-options/fr30-options.rst     |   27 +
 .../machine-dependent-options/frv-options.rst      |  279 ++
 .../machine-dependent-options/ft32-options.rst     |   44 +
 .../gnu-linux-options.rst                          |   56 +
 .../machine-dependent-options/h8-300-options.rst   |   64 +
 .../machine-dependent-options/hppa-options.rst     |  245 +
 .../machine-dependent-options/ia-64-options.rst    |  261 ++
 .../ibm-rs-6000-and-powerpc-options.rst            | 1017 ++++
 .../machine-dependent-options/lm32-options.rst     |   35 +
 .../loongarch-options.rst                          |  191 +
 .../machine-dependent-options/m32c-options.rst     |   38 +
 .../machine-dependent-options/m32r-d-options.rst   |  137 +
 .../machine-dependent-options/m680x0-options.rst   |  407 ++
 .../machine-dependent-options/mcore-options.rst    |   66 +
 .../machine-dependent-options/mep-options.rst      |  167 +
 .../microblaze-options.rst                         |  121 +
 .../machine-dependent-options/mips-options.rst     |  986 ++++
 .../machine-dependent-options/mmix-options.rst     |   75 +
 .../machine-dependent-options/mn10300-options.rst  |   93 +
 .../machine-dependent-options/moxie-options.rst    |   31 +
 .../machine-dependent-options/msp430-options.rst   |  189 +
 .../machine-dependent-options/nds32-options.rst    |  116 +
 .../machine-dependent-options/nios-ii-options.rst  |  363 ++
 .../nvidia-ptx-options.rst                         |   98 +
 .../machine-dependent-options/openrisc-options.rst |   95 +
 .../options-for-system-v.rst                       |   43 +
 .../machine-dependent-options/pdp-11-options.rst   |   73 +
 .../machine-dependent-options/picochip-options.rst |   55 +
 .../machine-dependent-options/powerpc-options.rst  |   15 +
 .../machine-dependent-options/pru-options.rst      |   63 +
 .../machine-dependent-options/risc-v-options.rst   |  216 +
 .../machine-dependent-options/rl78-options.rst     |   91 +
 .../machine-dependent-options/rx-options.rst       |  209 +
 .../s-390-and-zseries-options.rst                  |  244 +
 .../machine-dependent-options/score-options.rst    |   51 +
 .../machine-dependent-options/sh-options.rst       |  444 ++
 .../solaris-2-options.rst                          |   42 +
 .../machine-dependent-options/sparc-options.rst    |  388 ++
 .../machine-dependent-options/v850-options.rst     |  207 +
 .../machine-dependent-options/vax-options.rst      |   35 +
 .../machine-dependent-options/visium-options.rst   |   73 +
 .../machine-dependent-options/vms-options.rst      |   38 +
 .../machine-dependent-options/vxworks-options.rst  |   45 +
 .../machine-dependent-options/x86-options.rst      | 1620 +++++++
 .../x86-windows-options.rst                        |   95 +
 .../xstormy16-options.rst                          |   19 +
 .../machine-dependent-options/xtensa-options.rst   |  138 +
 .../machine-dependent-options/zseries-options.rst  |   15 +
 gcc/doc/gcc/gcc-command-options/option-summary.rst | 1527 ++++++
 .../options-controlling-c++-dialect.rst            | 2133 +++++++++
 .../options-controlling-c-dialect.rst              |  544 +++
 ...ling-objective-c-and-objective-c++-dialects.rst |  316 ++
 .../options-controlling-the-kind-of-output.rst     |  732 +++
 .../options-controlling-the-preprocessor.rst       |   79 +
 .../options-for-code-generation-conventions.rst    |  713 +++
 .../options-for-debugging-your-program.rst         |  471 ++
 .../options-for-directory-search.rst               |  102 +
 .../gcc-command-options/options-for-linking.rst    |  407 ++
 .../options-that-control-optimization.rst          | 4857 +++++++++++++++++++
 .../options-that-control-static-analysis.rst       | 1067 +++++
 ...s-to-control-diagnostic-messages-formatting.rst |  899 ++++
 .../options-to-request-or-suppress-warnings.rst    | 4866 ++++++++++++++++++++
 .../passing-options-to-the-assembler.rst           |   27 +
 .../program-instrumentation-options.rst            | 1111 +++++
 ...bprocesses-and-the-switches-to-pass-to-them.rst |  687 +++
 .../using-precompiled-headers.rst                  |  132 +
 gcc/doc/gcc/gcc.rst                                |   47 +
 gcc/doc/gcc/gcov-dump.rst                          |   70 +
 gcc/doc/gcc/gcov-tool.rst                          |  209 +
 gcc/doc/gcc/gcov.rst                               |   53 +
 .../gcov/brief-description-of-gcov-data-files.rst  |   33 +
 ...-file-relocation-to-support-cross-profiling.rst |   43 +
 gcc/doc/gcc/gcov/introduction-to-gcov.rst          |   62 +
 gcc/doc/gcc/gcov/invoking-gcov.rst                 |  656 +++
 ...-test-coverage-in-freestanding-environments.rst |  391 ++
 .../gcc/gcov/using-gcov-with-gcc-optimization.rst  |   86 +
 gcc/doc/gcc/general-public-license-3.rst           |    6 +
 gcc/doc/gcc/gnu-free-documentation-license.rst     |    6 +
 gcc/doc/gcc/gnu-objective-c-features.rst           |   27 +
 .../compatibilityalias.rst                         |   26 +
 .../constant-string-objects.rst                    |   64 +
 .../gcc/gnu-objective-c-features/exceptions.rst    |   79 +
 .../gnu-objective-c-features/fast-enumeration.rst  |  221 +
 .../garbage-collection.rst                         |   81 +
 .../gnu-objective-c-runtime-api.rst                |   98 +
 .../load-executing-code-before-main.rst            |  141 +
 .../messaging-with-the-gnu-objective-c-runtime.rst |  145 +
 .../gnu-objective-c-features/synchronization.rst   |   36 +
 .../gcc/gnu-objective-c-features/type-encoding.rst |  280 ++
 gcc/doc/gcc/gnu.rst                                |    1 +
 gcc/doc/gcc/have-you-found-a-bug.rst               |   62 +
 gcc/doc/gcc/how-and-where-to-report-bugs.rst       |   13 +
 gcc/doc/gcc/how-to-get-help-with-gcc.rst           |   26 +
 gcc/doc/gcc/index.rst                              |   40 +
 gcc/doc/gcc/indices-and-tables.rst                 |    1 +
 gcc/doc/gcc/known-causes-of-trouble-with-gcc.rst   |   32 +
 .../actual-bugs-we-havent-fixed-yet.rst            |   14 +
 .../certain-changes-we-dont-want-to-make.rst       |  236 +
 .../common-misunderstandings-with-gnu-c.rst        |  296 ++
 .../disappointments-and-misunderstandings.rst      |  102 +
 .../fixed-header-files.rst                         |   39 +
 .../incompatibilities-of-gcc.rst                   |  233 +
 .../interoperation.rst                             |  153 +
 .../standard-libraries.rst                         |   33 +
 .../warning-messages-and-error-messages.rst        |   46 +
 .../gcc/language-standards-supported-by-gcc.rst    |   23 +
 .../c++-language.rst                               |   71 +
 .../c-language.rst                                 |  139 +
 .../d-language.rst                                 |   11 +
 .../go-language.rst                                |   10 +
 .../objective-c-and-objective-c++-languages.rst    |   62 +
 .../references-for-other-languages.rst             |   13 +
 gcc/doc/gcc/lto-dump.rst                           |  117 +
 .../gcc/programming-languages-supported-by-gcc.rst |   54 +
 gcc/doc/gcc/reporting-bugs.rst                     |   23 +
 .../analysis-and-optimization-of-gimple-tuples.rst |   44 +
 .../alias-analysis.rst                             |  104 +
 .../annotations.rst                                |   17 +
 .../memory-model.rst                               |   34 +
 .../ssa-operands.rst                               |  388 ++
 .../static-single-assignment.rst                   |  259 ++
 .../analysis-and-representation-of-loops.rst       |   27 +
 .../data-dependency-analysis.rst                   |  135 +
 .../iv-analysis-on-rtl.rst                         |   55 +
 .../loop-closed-ssa-form.rst                       |   47 +
 .../loop-manipulation.rst                          |   58 +
 .../loop-querying.rst                              |   81 +
 .../loop-representation.rst                        |  137 +
 .../number-of-iterations-analysis.rst              |   85 +
 .../scalar-evolutions.rst                          |   71 +
 gcc/doc/gccint/analyzer-internals.rst              |  419 ++
 gcc/doc/gccint/collect2.rst                        |   77 +
 gcc/doc/gccint/conf.py                             |   24 +
 gcc/doc/gccint/contributing-to-gcc-development.rst |    6 +
 gcc/doc/gccint/contributors-to-gcc.rst             |    6 +
 gcc/doc/gccint/control-flow-graph.rst              |   43 +
 gcc/doc/gccint/control-flow-graph/basic-blocks.rst |  141 +
 gcc/doc/gccint/control-flow-graph/edges.rst        |  241 +
 .../control-flow-graph/liveness-information.rst    |   48 +
 .../control-flow-graph/maintaining-the-cfg.rst     |  145 +
 .../control-flow-graph/profile-information.rst     |  112 +
 gcc/doc/gccint/copyright.rst                       |   25 +
 gcc/doc/gccint/debugging-the-analyzer.rst          |  141 +
 gcc/doc/gccint/funding.rst                         |    6 +
 gcc/doc/gccint/gcc-and-portability.rst             |   41 +
 gcc/doc/gccint/general-public-license-3.rst        |    6 +
 gcc/doc/gccint/generic.rst                         |   47 +
 gcc/doc/gccint/generic/attributes-in-trees.rst     |   35 +
 gcc/doc/gccint/generic/c-and-c++-trees.rst         |  886 ++++
 gcc/doc/gccint/generic/declarations.rst            |  346 ++
 gcc/doc/gccint/generic/deficiencies.rst            |   14 +
 gcc/doc/gccint/generic/expressions.rst             |  910 ++++
 gcc/doc/gccint/generic/functions.rst               |  212 +
 .../gccint/generic/language-dependent-trees.rst    |   25 +
 gcc/doc/gccint/generic/overview.rst                |  213 +
 gcc/doc/gccint/generic/statements.rst              |  516 +++
 gcc/doc/gccint/generic/types.rst                   |  299 ++
 gcc/doc/gccint/gimple-api.rst                      |   47 +
 gcc/doc/gccint/gimple.rst                          |   88 +
 .../gimple/adding-a-new-gimple-statement-code.rst  |   36 +
 .../class-hierarchy-of-gimple-statements.rst       |  150 +
 gcc/doc/gccint/gimple/exception-handling.rst       |   46 +
 gcc/doc/gccint/gimple/gimple-instruction-set.rst   |  106 +
 gcc/doc/gccint/gimple/gimple-sequences.rst         |   94 +
 .../gimple/manipulating-gimple-statements.rst      |  176 +
 gcc/doc/gccint/gimple/operands.rst                 |  319 ++
 gcc/doc/gccint/gimple/sequence-iterators.rst       |  223 +
 .../gimple/statement-and-operand-traversals.rst    |   62 +
 gcc/doc/gccint/gimple/temporaries.rst              |   43 +
 gcc/doc/gccint/gimple/tuple-representation.rst     |  242 +
 gcc/doc/gccint/gimple/tuple-specific-accessors.rst |   44 +
 .../gimple/tuple-specific-accessors/gimpleasm.rst  |   66 +
 .../tuple-specific-accessors/gimpleassign.rst      |  126 +
 .../gimple/tuple-specific-accessors/gimplebind.rst |   56 +
 .../gimple/tuple-specific-accessors/gimplecall.rst |  116 +
 .../tuple-specific-accessors/gimplecatch.rst       |   37 +
 .../gimple/tuple-specific-accessors/gimplecond.rst |   80 +
 .../tuple-specific-accessors/gimpledebug.rst       |  106 +
 .../tuple-specific-accessors/gimpleehfilter.rst    |   45 +
 .../gimple/tuple-specific-accessors/gimplegoto.rst |   21 +
 .../tuple-specific-accessors/gimplelabel.rst       |   23 +
 .../gimple/tuple-specific-accessors/gimplenop.rst  |   17 +
 .../gimpleompatomicload.rst                        |   31 +
 .../gimpleompatomicstore.rst                       |   22 +
 .../tuple-specific-accessors/gimpleompcontinue.rst |   43 +
 .../tuple-specific-accessors/gimpleompcritical.rst |   28 +
 .../tuple-specific-accessors/gimpleompfor.rst      |   97 +
 .../tuple-specific-accessors/gimpleompmaster.rst   |   14 +
 .../tuple-specific-accessors/gimpleompordered.rst  |   16 +
 .../tuple-specific-accessors/gimpleompparallel.rst |   76 +
 .../tuple-specific-accessors/gimpleompreturn.rst   |   23 +
 .../tuple-specific-accessors/gimpleompsection.rst  |   24 +
 .../tuple-specific-accessors/gimpleompsections.rst |   48 +
 .../tuple-specific-accessors/gimpleompsingle.rst   |   28 +
 .../gimple/tuple-specific-accessors/gimplephi.rst  |   41 +
 .../gimple/tuple-specific-accessors/gimpleresx.rst |   24 +
 .../tuple-specific-accessors/gimplereturn.rst      |   21 +
 .../tuple-specific-accessors/gimpleswitch.rst      |   52 +
 .../gimple/tuple-specific-accessors/gimpletry.rst  |   51 +
 .../gimplewithcleanupexpr.rst                      |   30 +
 gcc/doc/gccint/gnu-free-documentation-license.rst  |    6 +
 gcc/doc/gccint/guidelines-for-diagnostics.rst      |  598 +++
 gcc/doc/gccint/guidelines-for-options.rst          |   13 +
 gcc/doc/gccint/host-common.rst                     |   57 +
 gcc/doc/gccint/host-configuration.rst              |   32 +
 gcc/doc/gccint/host-filesystem.rst                 |  103 +
 gcc/doc/gccint/host-makefile-fragments.rst         |   14 +
 gcc/doc/gccint/host-misc.rst                       |   70 +
 gcc/doc/gccint/index.rst                           |   51 +
 gcc/doc/gccint/indices-and-tables.rst              |    1 +
 gcc/doc/gccint/interfacing-to-gcc-output.rst       |   71 +
 gcc/doc/gccint/introduction.rst                    |   26 +
 gcc/doc/gccint/language-front-ends-in-gcc.rst      |   39 +
 gcc/doc/gccint/link-time-optimization.rst          |   33 +
 .../link-time-optimization/design-overview.rst     |  123 +
 .../internal-flags-controlling-lto1.rst            |   42 +
 .../link-time-optimization/lto-file-sections.rst   |  110 +
 .../using-summary-information-in-ipa-passes.rst    |  206 +
 ...tions-linker-plugin-and-symbol-visibilities.rst |   91 +
 gcc/doc/gccint/machine-descriptions.rst            |   49 +
 .../c-statements-for-assembler-output.rst          |  122 +
 .../canonicalization-of-instructions.rst           |  152 +
 .../machine-descriptions/conditional-execution.rst |   98 +
 .../machine-descriptions/constant-definitions.rst  |  185 +
 .../defining-how-to-split-instructions.rst         |  374 ++
 .../defining-jump-instruction-patterns.rst         |   37 +
 .../defining-looping-instruction-patterns.rst      |  134 +
 .../defining-rtl-sequences-for-code-generation.rst |  206 +
 .../everything-about-instruction-patterns.rst      |  106 +
 .../machine-descriptions/example-of-defineinsn.rst |   54 +
 .../including-patterns-in-machine-descriptions.rst |   70 +
 .../instruction-attributes.rst                     | 1248 +++++
 .../interdependence-of-patterns.rst                |   43 +
 gcc/doc/gccint/machine-descriptions/iterators.rst  |  543 +++
 .../machine-specific-peephole-optimizers.rst       |  330 ++
 .../machine-descriptions/operand-constraints.rst   |  426 ++
 .../output-templates-and-operand-substitution.rst  |   99 +
 ...view-of-how-the-machine-description-is-used.rst |   47 +
 gcc/doc/gccint/machine-descriptions/predicates.rst |  343 ++
 .../gccint/machine-descriptions/rtl-template.rst   |  255 +
 .../rtl-templates-transformations.rst              |  225 +
 .../standard-pattern-names-for-generation.rst      | 3413 ++++++++++++++
 .../when-the-order-of-patterns-matters.rst         |   29 +
 gcc/doc/gccint/makefile-fragments.rst              |   37 +
 gcc/doc/gccint/match-and-simplify.rst              |   34 +
 .../memory-management-and-type-information.rst     |  103 +
 .../how-to-invoke-the-garbage-collector.rst        |   36 +
 .../marking-roots-for-the-garbage-collector.rst    |   28 +
 .../source-files-containing-type-information.rst   |   60 +
 .../support-for-inheritance.rst                    |   59 +
 ...pport-for-user-provided-gc-marking-routines.rst |  121 +
 .../the-inside-of-a-gty.rst                        |  324 ++
 .../troubleshooting-the-garbage-collector.rst      |   27 +
 gcc/doc/gccint/option-file-format.rst              |  175 +
 gcc/doc/gccint/option-properties.rst               |  376 ++
 gcc/doc/gccint/option-specification-files.rst      |   21 +
 .../gccint/passes-and-files-of-the-compiler.rst    |   27 +
 .../gimplification-pass.rst                        |   44 +
 .../inter-procedural-optimization-passes.rst       |  269 ++
 .../optimization-info.rst                          |  262 ++
 .../parsing-pass.rst                               |   80 +
 .../pass-manager.rst                               |   42 +
 .../rtl-passes.rst                                 |  275 ++
 .../tree-ssa-passes.rst                            |  477 ++
 gcc/doc/gccint/plugins.rst                         |   35 +
 gcc/doc/gccint/plugins/building-gcc-plugins.rst    |   97 +
 .../controlling-which-passes-are-being-run.rst     |   16 +
 .../plugins/giving-information-about-a-plugin.rst  |   24 +
 .../interacting-with-the-gcc-garbage-collector.rst |   37 +
 .../plugins/interacting-with-the-pass-manager.rst  |   57 +
 .../plugins/keeping-track-of-available-passes.rst  |   17 +
 gcc/doc/gccint/plugins/loading-plugins.rst         |   31 +
 gcc/doc/gccint/plugins/plugin-api.rst              |  213 +
 .../recording-information-about-pass-execution.rst |   20 +
 .../registering-custom-attributes-or-pragmas.rst   |   73 +
 gcc/doc/gccint/rtl-representation.rst              |   48 +
 .../rtl-representation/access-to-operands.rst      |   73 +
 .../access-to-special-operands.rst                 |  188 +
 .../assembler-instructions-as-expressions.rst      |   45 +
 gcc/doc/gccint/rtl-representation/bit-fields.rst   |   48 +
 .../rtl-representation/comparison-operations.rst   |  112 +
 .../constant-expression-types.rst                  |  313 ++
 gcc/doc/gccint/rtl-representation/conversions.rst  |  152 +
 gcc/doc/gccint/rtl-representation/declarations.rst |   27 +
 .../embedded-side-effects-on-addresses.rst         |  100 +
 .../flags-in-an-rtl-expression.rst                 |  447 ++
 gcc/doc/gccint/rtl-representation/insns.rst        |  624 +++
 .../gccint/rtl-representation/machine-modes.rst    |  635 +++
 .../on-the-side-ssa-form-for-rtl.rst               |  748 +++
 gcc/doc/gccint/rtl-representation/reading-rtl.rst  |   28 +
 .../rtl-representation/registers-and-memory.rst    |  451 ++
 .../rtl-representation/rtl-classes-and-formats.rst |  192 +
 .../rtl-expressions-for-arithmetic.rst             |  310 ++
 .../gccint/rtl-representation/rtl-object-types.rst |   84 +
 .../rtl-representation-of-function-call-insns.rst  |   72 +
 .../rtl-representation/side-effect-expressions.rst |  374 ++
 .../structure-sharing-assumptions.rst              |   99 +
 .../variable-location-debug-information-in-rtl.rst |   64 +
 .../rtl-representation/vector-operations.rst       |   60 +
 .../sizes-and-offsets-as-runtime-invariants.rst    |   51 +
 .../alignment-of-polyints.rst                      |   84 +
 .../arithmetic-on-polyints.rst                     |  178 +
 .../comparisons-involving-polyint.rst              |  324 ++
 .../computing-bounds-on-polyints.rst               |   34 +
 .../consequences-of-using-polyint.rst              |   55 +
 .../converting-polyints.rst                        |   91 +
 .../guidelines-for-using-polyint.rst               |  119 +
 .../miscellaneous-polyint-routines.rst             |   16 +
 .../overview-of-polyint.rst                        |   78 +
 .../source-tree-structure-and-build-system.rst     |   21 +
 .../configure-terms-and-history.rst                |   64 +
 .../the-gcc-subdirectory.rst                       |   28 +
 .../anatomy-of-a-language-front-end.rst            |  281 ++
 .../anatomy-of-a-target-back-end.rst               |  116 +
 .../build-system-in-the-gcc-directory.rst          |   14 +
 .../building-documentation.rst                     |  247 +
 .../configuration-in-the-gcc-directory.rst         |  127 +
 .../headers-installed-by-gcc.rst                   |   50 +
 ...e-files-and-headers-under-the-gcc-directory.rst |   15 +
 .../the-gcc-subdirectory/makefile-targets.rst      |  195 +
 .../the-gcc-subdirectory/subdirectories-of-gcc.rst |   55 +
 .../top-level-source-directory.rst                 |  135 +
 .../gccint/standard-header-file-directories.rst    |   35 +
 gcc/doc/gccint/static-analyzer.rst                 |   19 +
 gcc/doc/gccint/target-macros.rst                   |   60 +
 .../adding-support-for-named-address-spaces.rst    |  163 +
 gcc/doc/gccint/target-macros/addressing-modes.rst  |  824 ++++
 .../adjusting-the-instruction-scheduler.rst        |  660 +++
 .../gccint/target-macros/anchored-addresses.rst    |   92 +
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 gcc/doc/gccint/target-macros/d-abi-parameters.rst  |  111 +
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 gcc/doc/gccint/target-macros/emulating-tls.rst     |  125 +
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 gcc/doc/gccint/target-macros/register-classes.rst  |  801 ++++
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 gcc/doc/gccint/target-macros/storage-layout.rst    |  729 +++
 .../target-macros/support-for-nested-functions.rst |  222 +
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 gcc/doc/gccint/target-makefile-fragments.rst       |  245 +
 gcc/doc/gccint/testsuites.rst                      |   31 +
 .../gccint/testsuites/ada-language-testsuites.rst  |   38 +
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 gcc/doc/gccint/the-language.rst                    |  384 ++
 gcc/doc/gccint/user-experience-guidelines.rst      |   30 +
 gcc/doc/install/binaries.rst                       |   54 +
 gcc/doc/install/building.rst                       |   67 +
 .../install/building/building-a-cross-compiler.rst |   74 +
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 gcc/doc/install/building/building-in-parallel.rst  |   15 +
 .../install/building/building-the-ada-compiler.rst |    9 +
 .../install/building/building-the-d-compiler.rst   |    9 +
 .../building/building-with-profile-feedback.rst    |   34 +
 gcc/doc/install/conf.py                            |   24 +
 gcc/doc/install/configuration.rst                  | 2098 +++++++++
 gcc/doc/install/copyright.rst                      |   24 +
 gcc/doc/install/downloading-gcc.rst                |   42 +
 gcc/doc/install/final-installation.rst             |  128 +
 gcc/doc/install/gnu-free-documentation-license.rst |    6 +
 ...-target-specific-installation-notes-for-gcc.rst | 1336 ++++++
 ...can-you-run-the-testsuite-on-selected-tests.rst |   46 +
 gcc/doc/install/how-to-interpret-test-results.rst  |   32 +
 gcc/doc/install/index.rst                          |   27 +
 gcc/doc/install/indices-and-tables.rst             |    1 +
 gcc/doc/install/installing-gcc.rst                 |   39 +
 ...ing-options-and-running-multiple-testsuites.rst |   74 +
 gcc/doc/install/prerequisites.rst                  |  319 ++
 gcc/doc/install/submitting-test-results.rst        |   22 +
 gcc/doc/install/testing.rst                        |   69 +
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 .../doc/gfc-internals/command-line-options.rst     |   30 +
 gcc/fortran/doc/gfc-internals/conf.py              |   24 +
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 gcc/fortran/doc/gfc-internals/error-handling.rst   |   75 +
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 gcc/fortran/doc/gfc-internals/gfccode.rst          |  146 +
 gcc/fortran/doc/gfc-internals/gfcexpr.rst          |  156 +
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 gcc/fortran/doc/gfc-internals/introduction.rst     |   32 +
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 gcc/fortran/doc/gfortran/about-gnu-fortran.rst     |  115 +
 gcc/fortran/doc/gfortran/coarray-programming.rst   |   17 +
 .../doc/gfortran/compiler-characteristics.rst      |   27 +
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 gcc/fortran/doc/gfortran/conf.py                   |   30 +
 gcc/fortran/doc/gfortran/contributing.rst          |   28 +
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 gcc/fortran/doc/gfortran/copyright.rst             |   25 +
 .../extensions-implemented-in-gnu-fortran.rst      | 1535 ++++++
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 gcc/fortran/doc/gfortran/extensions.rst            |   24 +
 .../doc/gfortran/function-abi-documentation.rst    | 1526 ++++++
 gcc/fortran/doc/gfortran/funding.rst               |    6 +
 .../doc/gfortran/general-public-license-3.rst      |    6 +
 gcc/fortran/doc/gfortran/gnu-fortran-and-gcc.rst   |   48 +
 .../doc/gfortran/gnu-fortran-command-options.rst   |   33 +
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 .../environment-variables-affecting-gfortran.rst   |   24 +
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 ...-to-request-or-suppress-errors-and-warnings.rst |  411 ++
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 gcc/fortran/doc/gfortran/index.rst                 |   56 +
 gcc/fortran/doc/gfortran/indices-and-tables.rst    |    1 +
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 gcc/fortran/doc/gfortran/intrinsic-modules.rst     |   20 +
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 1335 files changed, 176984 insertions(+)

diff --git a/doc/Makefile b/doc/Makefile
new file mode 100644
index 00000000000..9e305a8e7da
--- /dev/null
+++ b/doc/Makefile
@@ -0,0 +1,97 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS   ?= -j auto -q
+SPHINXBUILD  ?= sphinx-build
+PAPER        ?=
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_elements.papersize=a4paper
+PAPEROPT_letter = -D latex_elements.papersize=letterpaper
+# $(O) is meant as a shortcut for $(SPHINXOPTS)
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+# the i18n builder cannot share the environment and doctrees with the others
+I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+
+.PHONY: help
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html        to make standalone HTML files"
+	@echo "  dirhtml     to make HTML files named index.html in directories"
+	@echo "  singlehtml  to make a single large HTML file"
+	@echo "  pickle      to make pickle files"
+	@echo "  json        to make JSON files"
+	@echo "  htmlhelp    to make HTML files and an HTML help project"
+	@echo "  qthelp      to make HTML files and a qthelp project"
+	@echo "  applehelp   to make an Apple Help Book"
+	@echo "  devhelp     to make HTML files and a Devhelp project"
+	@echo "  epub        to make an epub"
+	@echo "  latex       to make LaTeX files (you can set PAPER=a4 or PAPER=letter)"
+	@echo "  latexpdf    to make LaTeX files and then PDFs out of them"
+	@echo "  latexpdfja  to make LaTeX files and run them through platex/dvipdfmx"
+	@echo "  lualatexpdf to make LaTeX files and run them through lualatex"
+	@echo "  xelatexpdf  to make LaTeX files and run them through xelatex"
+	@echo "  text        to make text files"
+	@echo "  man         to make manual pages"
+	@echo "  texinfo     to make Texinfo files"
+	@echo "  info        to make Texinfo files and run them through makeinfo"
+	@echo "  gettext     to make PO message catalogs"
+	@echo "  changes     to make an overview of all changed/added/deprecated items"
+	@echo "  xml         to make Docutils-native XML files"
+	@echo "  pseudoxml   to make pseudoxml-XML files for display purposes"
+	@echo "  linkcheck   to check all external links for integrity"
+	@echo "  doctest     to run all doctests embedded in the documentation (if enabled)"
+	@echo "  coverage    to run coverage check of the documentation (if enabled)"
+	@echo "  dummy       to check syntax errors of document sources"
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILDDIR)
+
+.PHONY: latexpdf
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	$(MAKE) LATEXMKOPTS="-interaction=nonstopmode -f" -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: latexpdfja
+latexpdfja:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through platex and dvipdfmx..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: lualatexpdf
+lualatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through lualatex..."
+	$(MAKE) PDFLATEX=lualatex -C $(BUILDDIR)/latex all-pdf
+	@echo "lualatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: xelatexpdf
+xelatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through xelatex..."
+	$(MAKE) PDFLATEX=xelatex -C $(BUILDDIR)/latex all-pdf
+	@echo "xelatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: info
+info:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo "Running Texinfo files through makeinfo..."
+	make -C $(BUILDDIR)/texinfo info
+	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
+
+.PHONY: gettext
+gettext:
+	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+
+# Catch-all target: route all unknown targets to Sphinx
+.PHONY: Makefile
+%: Makefile
+	$(SPHINXBUILD) -b "$@" $(ALLSPHINXOPTS) "$(BUILDDIR)/$@"
+
diff --git a/doc/_static/custom.css b/doc/_static/custom.css
new file mode 100644
index 00000000000..1282a993e2a
--- /dev/null
+++ b/doc/_static/custom.css
@@ -0,0 +1,11 @@
+.sidebar-brand-text {
+  font-size: 13pt;
+}
+
+.literal {
+  white-space: nowrap !important;
+}
+
+.wy-nav-content {
+  max-width: initial;
+}
diff --git a/doc/baseconf.py b/doc/baseconf.py
new file mode 100644
index 00000000000..2eea8298dae
--- /dev/null
+++ b/doc/baseconf.py
@@ -0,0 +1,230 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import os
+import subprocess
+import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+# gccint needs a deeper stack limit
+sys.setrecursionlimit(2000)
+
+# -- Project information -----------------------------------------------------
+
+# The full version, including alpha/beta/rc tags
+
+# FIXME
+folder = os.path.dirname(os.path.realpath(__file__))
+gcc_srcdir = os.path.join(folder, './objdir')
+
+
+def __read_file(name):
+    path = os.path.join(gcc_srcdir, name)
+    if os.path.exists(path):
+        return open(path).read().strip()
+    else:
+        return ''
+
+
+def __get_git_revision():
+    try:
+        r = subprocess.check_output('git rev-parse --short HEAD', shell=True, encoding='utf8',
+                                    stderr=subprocess.DEVNULL)
+        return r.strip()
+    except subprocess.CalledProcessError:
+        return None
+
+
+def __get_builder_name():
+    if '-b' in sys.argv:
+        return sys.argv[sys.argv.index('-b') + 1]
+    else:
+        return None
+
+
+gcc_BASEVER = __read_file('BASE-VER')
+gcc_DEVPHASE = __read_file('DEV-PHASE')
+gcc_DATESTAMP = __read_file('DATESTAMP')
+gcc_REVISION = __read_file('REVISION')
+
+VERSION_PACKAGE = os.getenv('VERSION_PACKAGE', '(GCC)')
+BUGURL = os.getenv('BUGURL', 'https://gcc.gnu.org/bugs/')
+MONOCHROMATIC = os.getenv('MONOCHROMATIC')
+
+# The short X.Y version.
+version = gcc_BASEVER
+
+# The full version, including alpha/beta/rc tags.
+release = ('%s (%s %s%s)'
+           % (gcc_BASEVER, gcc_DEVPHASE, gcc_DATESTAMP,
+              (' %s' % gcc_REVISION) if gcc_REVISION else ''))
+
+rst_prolog = r'''
+.. |gol| raw:: latex
+
+               \\
+.. |nbsp| unicode:: 0xA0
+  :trim:
+'''
+
+needs_sphinx = '5.3'
+
+rst_epilog = '''
+.. |gcc_version| replace:: %s
+.. |package_version| replace:: %s
+.. |bugurl| replace:: %s
+.. |needs_sphinx| replace:: %s
+''' % (gcc_BASEVER, VERSION_PACKAGE, BUGURL, needs_sphinx)
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'gcc_sphinx',
+    'sphinx.ext.intersphinx',
+    'sphinx.ext.extlinks',
+    'sphinx.ext.todo',
+]
+
+if __get_builder_name() == 'html':
+    extensions.append('sphinx_copybutton')
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ['_build']
+
+# Do not highlight by default
+highlight_language = 'none'
+
+# Select C++ as a primary domain
+primary_domain = 'cpp'
+
+cpp_id_attributes = ['HOST_WIDE_INT', '__memx']
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'furo'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+html_theme_options = {
+    'navigation_with_keys': True,
+}
+
+html_logo = '../logo.svg'
+
+html_favicon = '../favicon.ico'
+
+html_last_updated_fmt = ''
+
+html_context = {
+    'commit': __get_git_revision()
+}
+
+html_static_path = [
+    '../_static'
+]
+
+html_css_files = [
+    'custom.css'
+]
+
+# By default, do not generate any manual pages
+man_pages = []
+
+# FIXME: handle WARNINGs: unknown option issues and cross refs
+suppress_warnings = [
+    'ref.option',
+]
+
+# Use xelatex by default
+latex_engine = 'xelatex'
+
+latex_logo = '../logo.pdf'
+
+latex_elements = {
+    'pointsize': '11pt',
+    'fontpkg': r'''
+\setmonofont[Scale=0.8]{DejaVu Sans Mono}
+''',
+    'preamble': r'''
+\fvset{formatcom=\let\textbf\relax}
+\protected\def\sphinxcrossref#1{#1}
+''',
+}
+
+if MONOCHROMATIC:
+    latex_elements['sphinxsetup'] = r'''
+TitleColor={black},
+InnerLinkColor={rgb}{0.0, 0.2, 0.6},
+OuterLinkColor={rgb}{0.0, 0.2, 0.6},
+'''
+
+latex_table_style = ['colorrows']
+
+texinfo_cross_references = False
+
+texinfo_elements = {'preamble': """
+@definfoenclose strong,*,*
+@definfoenclose emph,','
+"""
+}
+
+# Use default as RTD theme uses default as well
+pygments_style = 'bw' if MONOCHROMATIC else 'default'
+
+option_emphasise_placeholders = True
+
+# Ignore GitHub domain for link checking:
+# https://github.com/sphinx-doc/sphinx/issues/9016
+linkcheck_ignore = [
+    'https://github.com/.*#.*'
+]
+
+USER_LEVEL_DOCS = ('install', 'gcc', 'gfortran', 'cpp', 'gnat_rm', 'gnat_ugn',
+                   'gccgo', 'libgomp', 'libquadmath', 'libgccjit')
+INTERNAL_DOCS = ('gccint', 'cppinternals', 'gfc-internals', 'gnat-style')
+
+# Cross manual reference mapping
+intersphinx_mapping = {}
+for manual in USER_LEVEL_DOCS + INTERNAL_DOCS:
+    intersphinx_mapping[manual] = (f'https://splichal.eu/scripts/sphinx/{manual}/_build/html/', None)
+
+# Custom references
+extlinks = {
+    'P': ('https://wg21.link/p%s', 'P%s'),
+    'PR': ('https://gcc.gnu.org/PR%s', 'PR%s'),
+    'openmp': ('https://openmp.org/specifications/#%s', 'OpenMP specification v%s'),
+    'openacc': ('https://openacc.org/specification#%s', 'OpenACC specification v%s'),
+}
+
+extlinks_detect_hardcoded_links = True
+
+# Set common settings where we need NAME of the documentation
+def set_common(name, module):
+    module['tags'].add(name)
+    if gcc_DEVPHASE == 'experimental':
+        module['todo_include_todos'] = True
+        module['tags'].add('development')
+
+    html_theme_options['source_edit_link'] = f'https://splichal.eu/scripts/sphinx/{name}' \
+                                               '/_build/html/_sources/{filename}.txt'
diff --git a/doc/bsd.rst b/doc/bsd.rst
new file mode 100644
index 00000000000..6d53fa6271c
--- /dev/null
+++ b/doc/bsd.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+BSD
+===
+
+Copyright (C) 1990 Regents of the University of California.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+#. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+#. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+#. [rescinded 22 July 1999]
+
+#. Neither the name of the University nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS 'AS IS' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
\ No newline at end of file
diff --git a/doc/contrib.rst b/doc/contrib.rst
new file mode 100644
index 00000000000..273d61717b1
--- /dev/null
+++ b/doc/contrib.rst
@@ -0,0 +1,1273 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: contributors
+
+.. _contributors:
+
+Contributors to GCC
+===================
+
+The GCC project would like to thank its many contributors.  Without them the
+project would not have been nearly as successful as it has been.  Any omissions
+in this list are accidental.  Feel free to contact
+law@redhat.com or gerald@pfeifer.com if you have been left
+out or some of your contributions are not listed.  Please keep this list in
+alphabetical order.
+
+* Analog Devices helped implement the support for complex data types
+  and iterators.
+
+* John David Anglin for threading-related fixes and improvements to
+  libstdc++-v3, and the HP-UX port.
+
+* James van Artsdalen wrote the code that makes efficient use of
+  the Intel 80387 register stack.
+
+* Abramo and Roberto Bagnara for the SysV68 Motorola 3300 Delta Series
+  port.
+
+* Alasdair Baird for various bug fixes.
+
+* Giovanni Bajo for analyzing lots of complicated C++ problem reports.
+
+* Peter Barada for his work to improve code generation for new
+  ColdFire cores.
+
+* Gerald Baumgartner added the signature extension to the C++ front end.
+
+* Godmar Back for his Java improvements and encouragement.
+
+* Scott Bambrough for help porting the Java compiler.
+
+* Wolfgang Bangerth for processing tons of bug reports.
+
+* Jon Beniston for his Microsoft Windows port of Java and port to Lattice Mico32.
+
+* Daniel Berlin for better DWARF 2 support, faster/better optimizations,
+  improved alias analysis, plus migrating GCC to Bugzilla.
+
+* Geoff Berry for his Java object serialization work and various patches.
+
+* David Binderman tests weekly snapshots of GCC trunk against Fedora Rawhide
+  for several architectures.
+
+* Laurynas Biveinis for memory management work and DJGPP port fixes.
+
+* Uros Bizjak for the implementation of x87 math built-in functions and
+  for various middle end and i386 back end improvements and bug fixes.
+
+* Eric Blake for helping to make GCJ and libgcj conform to the
+  specifications.
+
+* Janne Blomqvist for contributions to GNU Fortran.
+
+* Hans-J. Boehm for his garbage collector, IA-64 libffi port, and other
+  Java work.
+
+* Segher Boessenkool for helping maintain the PowerPC port and the
+  instruction combiner plus various contributions to the middle end.
+
+* Neil Booth for work on cpplib, lang hooks, debug hooks and other
+  miscellaneous clean-ups.
+
+* Steven Bosscher for integrating the GNU Fortran front end into GCC and for
+  contributing to the tree-ssa branch.
+
+* Eric Botcazou for fixing middle- and backend bugs left and right.
+
+* Per Bothner for his direction via the steering committee and various
+  improvements to the infrastructure for supporting new languages.  Chill
+  front end implementation.  Initial implementations of
+  cpplib, fix-header, config.guess, libio, and past C++ library (libg++)
+  maintainer.  Dreaming up, designing and implementing much of GCJ.
+
+* Devon Bowen helped port GCC to the Tahoe.
+
+* Don Bowman for mips-vxworks contributions.
+
+* James Bowman for the FT32 port.
+
+* Dave Brolley for work on cpplib and Chill.
+
+* Paul Brook for work on the ARM architecture and maintaining GNU Fortran.
+
+* Robert Brown implemented the support for Encore 32000 systems.
+
+* Christian Bruel for improvements to local store elimination.
+
+* Herman A.J. ten Brugge for various fixes.
+
+* Joerg Brunsmann for Java compiler hacking and help with the GCJ FAQ.
+
+* Joe Buck for his direction via the steering committee from its creation
+  to 2013.
+
+* Iain Buclaw for the D frontend.
+
+* Craig Burley for leadership of the G77 Fortran effort.
+
+* Tobias Burnus for contributions to GNU Fortran.
+
+* Stephan Buys for contributing Doxygen notes for libstdc++.
+
+* Paolo Carlini for libstdc++ work: lots of efficiency improvements to
+  the C++ strings, streambufs and formatted I/O, hard detective work on
+  the frustrating localization issues, and keeping up with the problem reports.
+
+* John Carr for his alias work, SPARC hacking, infrastructure improvements,
+  previous contributions to the steering committee, loop optimizations, etc.
+
+* Stephane Carrez for 68HC11 and 68HC12 ports.
+
+* Steve Chamberlain for support for the Renesas SH and H8 processors
+  and the PicoJava processor, and for GCJ config fixes.
+
+* Glenn Chambers for help with the GCJ FAQ.
+
+* John-Marc Chandonia for various libgcj patches.
+
+* Denis Chertykov for contributing and maintaining the AVR port, the first GCC port
+  for an 8-bit architecture.
+
+* Kito Cheng for his work on the RISC-V port, including bringing up the test
+  suite and maintenance.
+
+* Scott Christley for his Objective-C contributions.
+
+* Eric Christopher for his Java porting help and clean-ups.
+
+* Branko Cibej for more warning contributions.
+
+* The `GNU Classpath project <https://www.gnu.org/software/classpath/>`_
+  for all of their merged runtime code.
+
+* Nick Clifton for arm, mcore, fr30, v850, m32r, msp430 rx work,
+  :option:`--help`, and other random hacking.
+
+* Michael Cook for libstdc++ cleanup patches to reduce warnings.
+
+* R. Kelley Cook for making GCC buildable from a read-only directory as
+  well as other miscellaneous build process and documentation clean-ups.
+
+* Ralf Corsepius for SH testing and minor bug fixing.
+
+* François-Xavier Coudert for contributions to GNU Fortran.
+
+* Stan Cox for care and feeding of the x86 port and lots of behind
+  the scenes hacking.
+
+* Alex Crain provided changes for the 3b1.
+
+* Ian Dall for major improvements to the NS32k port.
+
+* Paul Dale for his work to add uClinux platform support to the
+  m68k backend.
+
+* Palmer Dabbelt for his work maintaining the RISC-V port.
+
+* Dario Dariol contributed the four varieties of sample programs
+  that print a copy of their source.
+
+* Russell Davidson for fstream and stringstream fixes in libstdc++.
+
+* Bud Davis for work on the G77 and GNU Fortran compilers.
+
+* Mo DeJong for GCJ and libgcj bug fixes.
+
+* Jerry DeLisle for contributions to GNU Fortran.
+
+* DJ Delorie for the DJGPP port, build and libiberty maintenance,
+  various bug fixes, and the M32C, MeP, MSP430, and RL78 ports.
+
+* Arnaud Desitter for helping to debug GNU Fortran.
+
+* Gabriel Dos Reis for contributions to G++, contributions and
+  maintenance of GCC diagnostics infrastructure, libstdc++-v3,
+  including ``valarray<>``, ``complex<>``, maintaining the numerics library
+  (including that pesky ``<limits>`` :-) and keeping up-to-date anything
+  to do with numbers.
+
+* Ulrich Drepper for his work on glibc, testing of GCC using glibc, ISO C99
+  support, CFG dumping support, etc., plus support of the C++ runtime
+  libraries including for all kinds of C interface issues, contributing and
+  maintaining ``complex<>``, sanity checking and disbursement, configuration
+  architecture, libio maintenance, and early math work.
+
+* François Dumont for his work on libstdc++-v3, especially maintaining and
+  improving ``debug-mode`` and associative and unordered containers.
+
+* Zdenek Dvorak for a new loop unroller and various fixes.
+
+* Michael Eager for his work on the Xilinx MicroBlaze port.
+
+* Richard Earnshaw for his ongoing work with the ARM.
+
+* David Edelsohn for his direction via the steering committee, ongoing work
+  with the RS6000/PowerPC port, help cleaning up Haifa loop changes,
+  doing the entire AIX port of libstdc++ with his bare hands, and for
+  ensuring GCC properly keeps working on AIX.
+
+* Kevin Ediger for the floating point formatting of num_put::do_put in
+  libstdc++.
+
+* Phil Edwards for libstdc++ work including configuration hackery,
+  documentation maintainer, chief breaker of the web pages, the occasional
+  iostream bug fix, and work on shared library symbol versioning.
+
+* Paul Eggert for random hacking all over GCC.
+
+* Mark Elbrecht for various DJGPP improvements, and for libstdc++
+  configuration support for locales and fstream-related fixes.
+
+* Vadim Egorov for libstdc++ fixes in strings, streambufs, and iostreams.
+
+* Christian Ehrhardt for dealing with bug reports.
+
+* Ben Elliston for his work to move the Objective-C runtime into its
+  own subdirectory and for his work on autoconf.
+
+* Revital Eres for work on the PowerPC 750CL port.
+
+* Marc Espie for OpenBSD support.
+
+* Doug Evans for much of the global optimization framework, arc, m32r,
+  and SPARC work.
+
+* Christopher Faylor for his work on the Cygwin port and for caring and
+  feeding the gcc.gnu.org box and saving its users tons of spam.
+
+* Fred Fish for BeOS support and Ada fixes.
+
+* Ivan Fontes Garcia for the Portuguese translation of the GCJ FAQ.
+
+* Peter Gerwinski for various bug fixes and the Pascal front end.
+
+* Kaveh R. Ghazi for his direction via the steering committee, amazing
+  work to make :samp:`-W -Wall -W* -Werror` useful, and
+  testing GCC on a plethora of platforms.  Kaveh extends his gratitude to
+  the CAIP Center at Rutgers University for providing him with computing
+  resources to work on Free Software from the late 1980s to 2010.
+
+* John Gilmore for a donation to the FSF earmarked improving GNU Java.
+
+* Judy Goldberg for c++ contributions.
+
+* Torbjorn Granlund for various fixes and the c-torture testsuite,
+  multiply- and divide-by-constant optimization, improved long long
+  support, improved leaf function register allocation, and his direction
+  via the steering committee.
+
+* Jonny Grant for improvements to ``collect2's`` :option:`--help` documentation.
+
+* Anthony Green for his :option:`-Os` contributions, the moxie port, and
+  Java front end work.
+
+* Stu Grossman for gdb hacking, allowing GCJ developers to debug Java code.
+
+* Michael K. Gschwind contributed the port to the PDP-11.
+
+* Richard Biener for his ongoing middle-end contributions and bug fixes
+  and for release management.
+
+* Ron Guilmette implemented the :command:`protoize` and :command:`unprotoize`
+  tools, the support for DWARF 1 symbolic debugging information, and much of
+  the support for System V Release 4.  He has also worked heavily on the
+  Intel 386 and 860 support.
+
+* Sumanth Gundapaneni for contributing the CR16 port.
+
+* Mostafa Hagog for Swing Modulo Scheduling (SMS) and post reload GCSE.
+
+* Bruno Haible for improvements in the runtime overhead for EH, new
+  warnings and assorted bug fixes.
+
+* Andrew Haley for his amazing Java compiler and library efforts.
+
+* Chris Hanson assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Michael Hayes for various thankless work he's done trying to get
+  the c30/c40 ports functional.  Lots of loop and unroll improvements and
+  fixes.
+
+* Dara Hazeghi for wading through myriads of target-specific bug reports.
+
+* Kate Hedstrom for staking the G77 folks with an initial testsuite.
+
+* Richard Henderson for his ongoing SPARC, alpha, ia32, and ia64 work, loop
+  opts, and generally fixing lots of old problems we've ignored for
+  years, flow rewrite and lots of further stuff, including reviewing
+  tons of patches.
+
+* Aldy Hernandez for working on the PowerPC port, SIMD support, and
+  various fixes.
+
+* Nobuyuki Hikichi of Software Research Associates, Tokyo, contributed
+  the support for the Sony NEWS machine.
+
+* Kazu Hirata for caring and feeding the Renesas H8/300 port and various fixes.
+
+* Katherine Holcomb for work on GNU Fortran.
+
+* Manfred Hollstein for his ongoing work to keep the m88k alive, lots
+  of testing and bug fixing, particularly of GCC configury code.
+
+* Steve Holmgren for MachTen patches.
+
+* Mat Hostetter for work on the TILE-Gx and TILEPro ports.
+
+* Jan Hubicka for his x86 port improvements.
+
+* Falk Hueffner for working on C and optimization bug reports.
+
+* Bernardo Innocenti for his m68k work, including merging of
+  ColdFire improvements and uClinux support.
+
+* Christian Iseli for various bug fixes.
+
+* Kamil Iskra for general m68k hacking.
+
+* Lee Iverson for random fixes and MIPS testing.
+
+* Balaji V. Iyer for Cilk+ development and merging.
+
+* Andreas Jaeger for testing and benchmarking of GCC and various bug fixes.
+
+* Martin Jambor for his work on inter-procedural optimizations, the
+  switch conversion pass, and scalar replacement of aggregates.
+
+* Jakub Jelinek for his SPARC work and sibling call optimizations as well
+  as lots of bug fixes and test cases, and for improving the Java build
+  system.
+
+* Janis Johnson for ia64 testing and fixes, her quality improvement
+  sidetracks, and web page maintenance.
+
+* Kean Johnston for SCO OpenServer support and various fixes.
+
+* Tim Josling for the sample language treelang based originally on Richard
+  Kenner's 'toy' language.
+
+* Nicolai Josuttis for additional libstdc++ documentation.
+
+* Klaus Kaempf for his ongoing work to make alpha-vms a viable target.
+
+* Steven G. Kargl for work on GNU Fortran.
+
+* David Kashtan of SRI adapted GCC to VMS.
+
+* Ryszard Kabatek for many, many libstdc++ bug fixes and optimizations of
+  strings, especially member functions, and for auto_ptr fixes.
+
+* Geoffrey Keating for his ongoing work to make the PPC work for GNU/Linux
+  and his automatic regression tester.
+
+* Brendan Kehoe for his ongoing work with G++ and for a lot of early work
+  in just about every part of libstdc++.
+
+* Oliver M. Kellogg of Deutsche Aerospace contributed the port to the
+  MIL-STD-1750A.
+
+* Richard Kenner of the New York University Ultracomputer Research
+  Laboratory wrote the machine descriptions for the AMD 29000, the DEC
+  Alpha, the IBM RT PC, and the IBM RS/6000 as well as the support for
+  instruction attributes.  He also made changes to better support RISC
+  processors including changes to common subexpression elimination,
+  strength reduction, function calling sequence handling, and condition
+  code support, in addition to generalizing the code for frame pointer
+  elimination and delay slot scheduling.  Richard Kenner was also the
+  head maintainer of GCC for several years.
+
+* Mumit Khan for various contributions to the Cygwin and Mingw32 ports and
+  maintaining binary releases for Microsoft Windows hosts, and for massive libstdc++
+  porting work to Cygwin/Mingw32.
+
+* Robin Kirkham for cpu32 support.
+
+* Mark Klein for PA improvements.
+
+* Thomas Koenig for various bug fixes.
+
+* Bruce Korb for the new and improved fixincludes code.
+
+* Benjamin Kosnik for his G++ work and for leading the libstdc++-v3 effort.
+
+* Maxim Kuvyrkov for contributions to the instruction scheduler, the Android
+  and m68k/Coldfire ports, and optimizations.
+
+* Charles LaBrec contributed the support for the Integrated Solutions
+  68020 system.
+
+* Asher Langton and Mike Kumbera for contributing Cray pointer support
+  to GNU Fortran, and for other GNU Fortran improvements.
+
+* Jeff Law for his direction via the steering committee, coordinating the
+  entire egcs project and GCC 2.95, rolling out snapshots and releases,
+  handling merges from GCC2, reviewing tons of patches that might have
+  fallen through the cracks else, and random but extensive hacking.
+
+* Walter Lee for work on the TILE-Gx and TILEPro ports.
+
+* Marc Lehmann for his direction via the steering committee and helping
+  with analysis and improvements of x86 performance.
+
+* Victor Leikehman for work on GNU Fortran.
+
+* Ted Lemon wrote parts of the RTL reader and printer.
+
+* Kriang Lerdsuwanakij for C++ improvements including template as template
+  parameter support, and many C++ fixes.
+
+* Warren Levy for tremendous work on libgcj (Java Runtime Library) and
+  random work on the Java front end.
+
+* Alain Lichnewsky ported GCC to the MIPS CPU.
+
+* Oskar Liljeblad for hacking on AWT and his many Java bug reports and
+  patches.
+
+* Robert Lipe for OpenServer support, new testsuites, testing, etc.
+
+* Chen Liqin for various S+core related fixes/improvement, and for
+  maintaining the S+core port.
+
+* Martin Liska for his work on identical code folding, the sanitizers,
+  HSA, general bug fixing and for running automated regression testing of GCC
+  and reporting numerous bugs.
+
+* Weiwen Liu for testing and various bug fixes.
+
+* Manuel López-Ibáñez for improving :option:`-Wconversion` and
+  many other diagnostics fixes and improvements.
+
+* Dave Love for his ongoing work with the Fortran front end and
+  runtime libraries.
+
+* Martin von Löwis for internal consistency checking infrastructure,
+  various C++ improvements including namespace support, and tons of
+  assistance with libstdc++/compiler merges.
+
+* H.J. Lu for his previous contributions to the steering committee, many x86
+  bug reports, prototype patches, and keeping the GNU/Linux ports working.
+
+* Greg McGary for random fixes and (someday) bounded pointers.
+
+* Andrew MacLeod for his ongoing work in building a real EH system,
+  various code generation improvements, work on the global optimizer, etc.
+
+* Vladimir Makarov for hacking some ugly i960 problems, PowerPC hacking
+  improvements to compile-time performance, overall knowledge and
+  direction in the area of instruction scheduling, design and
+  implementation of the automaton based instruction scheduler and
+  design and implementation of the integrated and local register allocators.
+
+* David Malcolm for his work on improving GCC diagnostics, JIT, self-tests
+  and unit testing.
+
+* Bob Manson for his behind the scenes work on dejagnu.
+
+* John Marino for contributing the DragonFly BSD port.
+
+* Philip Martin for lots of libstdc++ string and vector iterator fixes and
+  improvements, and string clean up and testsuites.
+
+* Michael Matz for his work on dominance tree discovery, the x86-64 port,
+  link-time optimization framework and general optimization improvements.
+
+* All of the Mauve project contributors for Java test code.
+
+* Bryce McKinlay for numerous GCJ and libgcj fixes and improvements.
+
+* Adam Megacz for his work on the Microsoft Windows port of GCJ.
+
+* Michael Meissner for LRS framework, ia32, m32r, v850, m88k, MIPS,
+  powerpc, haifa, ECOFF debug support, and other assorted hacking.
+
+* Jason Merrill for his direction via the steering committee and leading
+  the G++ effort.
+
+* Martin Michlmayr for testing GCC on several architectures using the
+  entire Debian archive.
+
+* David Miller for his direction via the steering committee, lots of
+  SPARC work, improvements in jump.cc and interfacing with the Linux kernel
+  developers.
+
+* Gary Miller ported GCC to Charles River Data Systems machines.
+
+* Alfred Minarik for libstdc++ string and ios bug fixes, and turning the
+  entire libstdc++ testsuite namespace-compatible.
+
+* Mark Mitchell for his direction via the steering committee, mountains of
+  C++ work, load/store hoisting out of loops, alias analysis improvements,
+  ISO C ``restrict`` support, and serving as release manager from 2000
+  to 2011.
+
+* Alan Modra for various GNU/Linux bits and testing.
+
+* Toon Moene for his direction via the steering committee, Fortran
+  maintenance, and his ongoing work to make us make Fortran run fast.
+
+* Jason Molenda for major help in the care and feeding of all the services
+  on the gcc.gnu.org (formerly egcs.cygnus.com) machine---mail, web
+  services, ftp services, etc etc.  Doing all this work on scrap paper and
+  the backs of envelopes would have been... difficult.
+
+* Catherine Moore for fixing various ugly problems we have sent her
+  way, including the haifa bug which was killing the Alpha & PowerPC
+  Linux kernels.
+
+* Mike Moreton for his various Java patches.
+
+* David Mosberger-Tang for various Alpha improvements, and for the initial
+  IA-64 port.
+
+* Stephen Moshier contributed the floating point emulator that assists in
+  cross-compilation and permits support for floating point numbers wider
+  than 64 bits and for ISO C99 support.
+
+* Bill Moyer for his behind the scenes work on various issues.
+
+* Philippe De Muyter for his work on the m68k port.
+
+* Joseph S. Myers for his work on the PDP-11 port, format checking and ISO
+  C99 support, and continuous emphasis on (and contributions to) documentation.
+
+* Nathan Myers for his work on libstdc++-v3: architecture and authorship
+  through the first three snapshots, including implementation of locale
+  infrastructure, string, shadow C headers, and the initial project
+  documentation (DESIGN, CHECKLIST, and so forth).  Later, more work on
+  MT-safe string and shadow headers.
+
+* Felix Natter for documentation on porting libstdc++.
+
+* Nathanael Nerode for cleaning up the configuration/build process.
+
+* NeXT, Inc. donated the front end that supports the Objective-C
+  language.
+
+* Hans-Peter Nilsson for the CRIS and MMIX ports, improvements to the search
+  engine setup, various documentation fixes and other small fixes.
+
+* Geoff Noer for his work on getting cygwin native builds working.
+
+* Vegard Nossum for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Diego Novillo for his work on Tree SSA, OpenMP, SPEC performance
+  tracking web pages, GIMPLE tuples, and assorted fixes.
+
+* David O'Brien for the FreeBSD/alpha, FreeBSD/AMD x86-64, FreeBSD/ARM,
+  FreeBSD/PowerPC, and FreeBSD/SPARC64 ports and related infrastructure
+  improvements.
+
+* Alexandre Oliva for various build infrastructure improvements, scripts and
+  amazing testing work, including keeping libtool issues sane and happy.
+
+* Stefan Olsson for work on mt_alloc.
+
+* Melissa O'Neill for various NeXT fixes.
+
+* Rainer Orth for random MIPS work, including improvements to GCC's o32
+  ABI support, improvements to dejagnu's MIPS support, Java configuration
+  clean-ups and porting work, and maintaining the IRIX, Solaris 2, and
+  Tru64 UNIX ports.
+
+* Steven Pemberton for his contribution of :samp:`enquire` which allowed GCC to
+  determine various properties of the floating point unit and generate
+  :samp:`float.h` in older versions of GCC.
+
+* Hartmut Penner for work on the s390 port.
+
+* Paul Petersen wrote the machine description for the Alliant FX/8.
+
+* Alexandre Petit-Bianco for implementing much of the Java compiler and
+  continued Java maintainership.
+
+* Matthias Pfaller for major improvements to the NS32k port.
+
+* Gerald Pfeifer for his direction via the steering committee, pointing
+  out lots of problems we need to solve, maintenance of the web pages, and
+  taking care of documentation maintenance in general.
+
+* Marek Polacek for his work on the C front end, the sanitizers and general
+  bug fixing.
+
+* Andrew Pinski for processing bug reports by the dozen.
+
+* Ovidiu Predescu for his work on the Objective-C front end and runtime
+  libraries.
+
+* Jerry Quinn for major performance improvements in C++ formatted I/O.
+
+* Ken Raeburn for various improvements to checker, MIPS ports and various
+  cleanups in the compiler.
+
+* Rolf W. Rasmussen for hacking on AWT.
+
+* David Reese of Sun Microsystems contributed to the Solaris on PowerPC
+  port.
+
+* John Regehr for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Volker Reichelt for running automated regression testing of GCC and reporting
+  numerous bugs and for keeping up with the problem reports.
+
+* Joern Rennecke for maintaining the sh port, loop, regmove & reload
+  hacking and developing and maintaining the Epiphany port.
+
+* Loren J. Rittle for improvements to libstdc++-v3 including the FreeBSD
+  port, threading fixes, thread-related configury changes, critical
+  threading documentation, and solutions to really tricky I/O problems,
+  as well as keeping GCC properly working on FreeBSD and continuous testing.
+
+* Craig Rodrigues for processing tons of bug reports.
+
+* Ola Rönnerup for work on mt_alloc.
+
+* Gavin Romig-Koch for lots of behind the scenes MIPS work.
+
+* David Ronis inspired and encouraged Craig to rewrite the G77
+  documentation in texinfo format by contributing a first pass at a
+  translation of the old :samp:`g77-0.5.16/f/DOC` file.
+
+* Ken Rose for fixes to GCC's delay slot filling code.
+
+* Ira Rosen for her contributions to the auto-vectorizer.
+
+* Paul Rubin wrote most of the preprocessor.
+
+* Pétur Runólfsson for major performance improvements in C++ formatted I/O and
+  large file support in C++ filebuf.
+
+* Chip Salzenberg for libstdc++ patches and improvements to locales, traits,
+  Makefiles, libio, libtool hackery, and 'long long' support.
+
+* Juha Sarlin for improvements to the H8 code generator.
+
+* Greg Satz assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Roger Sayle for improvements to constant folding and GCC's RTL optimizers
+  as well as for fixing numerous bugs.
+
+* Bradley Schatz for his work on the GCJ FAQ.
+
+* Peter Schauer wrote the code to allow debugging to work on the Alpha.
+
+* William Schelter did most of the work on the Intel 80386 support.
+
+* Tobias Schlüter for work on GNU Fortran.
+
+* Bernd Schmidt for various code generation improvements and major
+  work in the reload pass, serving as release manager for
+  GCC 2.95.3, and work on the Blackfin and C6X ports.
+
+* Peter Schmid for constant testing of libstdc++---especially application
+  testing, going above and beyond what was requested for the release
+  criteria---and libstdc++ header file tweaks.
+
+* Jason Schroeder for jcf-dump patches.
+
+* Andreas Schwab for his work on the m68k port.
+
+* Lars Segerlund for work on GNU Fortran.
+
+* Dodji Seketeli for numerous C++ bug fixes and debug info improvements.
+
+* Tim Shen for major work on ``<regex>``.
+
+* Joel Sherrill for his direction via the steering committee, RTEMS
+  contributions and RTEMS testing.
+
+* Nathan Sidwell for many C++ fixes/improvements.
+
+* Jeffrey Siegal for helping RMS with the original design of GCC, some
+  code which handles the parse tree and RTL data structures, constant
+  folding and help with the original VAX & m68k ports.
+
+* Kenny Simpson for prompting libstdc++ fixes due to defect reports from
+  the LWG (thereby keeping GCC in line with updates from the ISO).
+
+* Franz Sirl for his ongoing work with making the PPC port stable
+  for GNU/Linux.
+
+* Andrey Slepuhin for assorted AIX hacking.
+
+* Trevor Smigiel for contributing the SPU port.
+
+* Christopher Smith did the port for Convex machines.
+
+* Danny Smith for his major efforts on the Mingw (and Cygwin) ports.
+  Retired from GCC maintainership August 2010, having mentored two
+  new maintainers into the role.
+
+* Randy Smith finished the Sun FPA support.
+
+* Ed Smith-Rowland for his continuous work on libstdc++-v3, special functions,
+  ``<random>``, and various improvements to C++11 features.
+
+* Scott Snyder for queue, iterator, istream, and string fixes and libstdc++
+  testsuite entries.  Also for providing the patch to G77 to add
+  rudimentary support for ``INTEGER*1``, ``INTEGER*2``, and
+  ``LOGICAL*1``.
+
+* Zdenek Sojka for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Arseny Solokha for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Jayant Sonar for contributing the CR16 port.
+
+* Brad Spencer for contributions to the GLIBCPP_FORCE_NEW technique.
+
+* Richard Stallman, for writing the original GCC and launching the GNU project.
+
+* Jan Stein of the Chalmers Computer Society provided support for
+  Genix, as well as part of the 32000 machine description.
+
+* Gerhard Steinmetz for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Nigel Stephens for various mips16 related fixes/improvements.
+
+* Jonathan Stone wrote the machine description for the Pyramid computer.
+
+* Graham Stott for various infrastructure improvements.
+
+* John Stracke for his Java HTTP protocol fixes.
+
+* Mike Stump for his Elxsi port, G++ contributions over the years and more
+  recently his vxworks contributions
+
+* Jeff Sturm for Java porting help, bug fixes, and encouragement.
+
+* Zhendong Su for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Chengnian Sun for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Shigeya Suzuki for this fixes for the bsdi platforms.
+
+* Ian Lance Taylor for the Go frontend, the initial mips16 and mips64
+  support, general configury hacking, fixincludes, etc.
+
+* Holger Teutsch provided the support for the Clipper CPU.
+
+* Gary Thomas for his ongoing work to make the PPC work for GNU/Linux.
+
+* Paul Thomas for contributions to GNU Fortran.
+
+* Philipp Thomas for random bug fixes throughout the compiler
+
+* Jason Thorpe for thread support in libstdc++ on NetBSD.
+
+* Kresten Krab Thorup wrote the run time support for the Objective-C
+  language and the fantastic Java bytecode interpreter.
+
+* Michael Tiemann for random bug fixes, the first instruction scheduler,
+  initial C++ support, function integration, NS32k, SPARC and M88k
+  machine description work, delay slot scheduling.
+
+* Andreas Tobler for his work porting libgcj to Darwin.
+
+* Teemu Torma for thread safe exception handling support.
+
+* Leonard Tower wrote parts of the parser, RTL generator, and RTL
+  definitions, and of the VAX machine description.
+
+* Daniel Towner and Hariharan Sandanagobalane contributed and
+  maintain the picoChip port.
+
+* Tom Tromey for internationalization support and for his many Java
+  contributions and libgcj maintainership.
+
+* Lassi Tuura for improvements to config.guess to determine HP processor
+  types.
+
+* Petter Urkedal for libstdc++ CXXFLAGS, math, and algorithms fixes.
+
+* Andy Vaught for the design and initial implementation of the GNU Fortran
+  front end.
+
+* Brent Verner for work with the libstdc++ cshadow files and their
+  associated configure steps.
+
+* Todd Vierling for contributions for NetBSD ports.
+
+* Andrew Waterman for contributing the RISC-V port, as well as maintaining it.
+
+* Jonathan Wakely for contributing libstdc++ Doxygen notes and XHTML
+  guidance and maintaining libstdc++.
+
+* Dean Wakerley for converting the install documentation from HTML to texinfo
+  in time for GCC 3.0.
+
+* Krister Walfridsson for random bug fixes.
+
+* Feng Wang for contributions to GNU Fortran.
+
+* Stephen M. Webb for time and effort on making libstdc++ shadow files
+  work with the tricky Solaris 8+ headers, and for pushing the build-time
+  header tree. Also, for starting and driving the ``<regex>`` effort.
+
+* John Wehle for various improvements for the x86 code generator,
+  related infrastructure improvements to help x86 code generation,
+  value range propagation and other work, WE32k port.
+
+* Ulrich Weigand for work on the s390 port.
+
+* Janus Weil for contributions to GNU Fortran.
+
+* Zack Weinberg for major work on cpplib and various other bug fixes.
+
+* Matt Welsh for help with Linux Threads support in GCJ.
+
+* Urban Widmark for help fixing java.io.
+
+* Mark Wielaard for new Java library code and his work integrating with
+  Classpath.
+
+* Dale Wiles helped port GCC to the Tahoe.
+
+* Bob Wilson from Tensilica, Inc. for the Xtensa port.
+
+* Jim Wilson for his direction via the steering committee, tackling hard
+  problems in various places that nobody else wanted to work on, strength
+  reduction and other loop optimizations.
+
+* Paul Woegerer and Tal Agmon for the CRX port.
+
+* Carlo Wood for various fixes.
+
+* Tom Wood for work on the m88k port.
+
+* Chung-Ju Wu for his work on the Andes NDS32 port.
+
+* Canqun Yang for work on GNU Fortran.
+
+* Masanobu Yuhara of Fujitsu Laboratories implemented the machine
+  description for the Tron architecture (specifically, the Gmicro).
+
+* Kevin Zachmann helped port GCC to the Tahoe.
+
+* Ayal Zaks for Swing Modulo Scheduling (SMS).
+
+* Qirun Zhang for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Xiaoqiang Zhang for work on GNU Fortran.
+
+* Gilles Zunino for help porting Java to Irix.
+
+The following people are recognized for their contributions to GNAT,
+the Ada front end of GCC:
+
+* Bernard Banner
+
+* Romain Berrendonner
+
+* Geert Bosch
+
+* Emmanuel Briot
+
+* Joel Brobecker
+
+* Ben Brosgol
+
+* Vincent Celier
+
+* Arnaud Charlet
+
+* Chien Chieng
+
+* Cyrille Comar
+
+* Cyrille Crozes
+
+* Robert Dewar
+
+* Gary Dismukes
+
+* Robert Duff
+
+* Ed Falis
+
+* Ramon Fernandez
+
+* Sam Figueroa
+
+* Vasiliy Fofanov
+
+* Michael Friess
+
+* Franco Gasperoni
+
+* Ted Giering
+
+* Matthew Gingell
+
+* Laurent Guerby
+
+* Jerome Guitton
+
+* Olivier Hainque
+
+* Jerome Hugues
+
+* Hristian Kirtchev
+
+* Jerome Lambourg
+
+* Bruno Leclerc
+
+* Albert Lee
+
+* Sean McNeil
+
+* Javier Miranda
+
+* Laurent Nana
+
+* Pascal Obry
+
+* Dong-Ik Oh
+
+* Laurent Pautet
+
+* Brett Porter
+
+* Thomas Quinot
+
+* Nicolas Roche
+
+* Pat Rogers
+
+* Jose Ruiz
+
+* Douglas Rupp
+
+* Sergey Rybin
+
+* Gail Schenker
+
+* Ed Schonberg
+
+* Nicolas Setton
+
+* Samuel Tardieu
+
+The following people are recognized for their contributions of new
+features, bug reports, testing and integration of classpath/libgcj for
+GCC version 4.1:
+
+* Lillian Angel for ``JTree`` implementation and lots Free Swing
+  additions and bug fixes.
+
+* Wolfgang Baer for ``GapContent`` bug fixes.
+
+* Anthony Balkissoon for ``JList``, Free Swing 1.5 updates and mouse event
+  fixes, lots of Free Swing work including ``JTable`` editing.
+
+* Stuart Ballard for RMI constant fixes.
+
+* Goffredo Baroncelli for ``HTTPURLConnection`` fixes.
+
+* Gary Benson for ``MessageFormat`` fixes.
+
+* Daniel Bonniot for ``Serialization`` fixes.
+
+* Chris Burdess for lots of gnu.xml and http protocol fixes, ``StAX``
+  and ``DOM xml:id`` support.
+
+* Ka-Hing Cheung for ``TreePath`` and ``TreeSelection`` fixes.
+
+* Archie Cobbs for build fixes, VM interface updates,
+  ``URLClassLoader`` updates.
+
+* Kelley Cook for build fixes.
+
+* Martin Cordova for Suggestions for better ``SocketTimeoutException``.
+
+* David Daney for ``BitSet`` bug fixes, ``HttpURLConnection``
+  rewrite and improvements.
+
+* Thomas Fitzsimmons for lots of upgrades to the gtk+ AWT and Cairo 2D
+  support. Lots of imageio framework additions, lots of AWT and Free
+  Swing bug fixes.
+
+* Jeroen Frijters for ``ClassLoader`` and nio cleanups, serialization fixes,
+  better ``Proxy`` support, bug fixes and IKVM integration.
+
+* Santiago Gala for ``AccessControlContext`` fixes.
+
+* Nicolas Geoffray for ``VMClassLoader`` and ``AccessController``
+  improvements.
+
+* David Gilbert for ``basic`` and ``metal`` icon and plaf support
+  and lots of documenting, Lots of Free Swing and metal theme
+  additions. ``MetalIconFactory`` implementation.
+
+* Anthony Green for ``MIDI`` framework, ``ALSA`` and ``DSSI``
+  providers.
+
+* Andrew Haley for ``Serialization`` and ``URLClassLoader`` fixes,
+  gcj build speedups.
+
+* Kim Ho for ``JFileChooser`` implementation.
+
+* Andrew John Hughes for ``Locale`` and net fixes, URI RFC2986
+  updates, ``Serialization`` fixes, ``Properties`` XML support and
+  generic branch work, VMIntegration guide update.
+
+* Bastiaan Huisman for ``TimeZone`` bug fixing.
+
+* Andreas Jaeger for mprec updates.
+
+* Paul Jenner for better :option:`-Werror` support.
+
+* Ito Kazumitsu for ``NetworkInterface`` implementation and updates.
+
+* Roman Kennke for ``BoxLayout``, ``GrayFilter`` and
+  ``SplitPane``, plus bug fixes all over. Lots of Free Swing work
+  including styled text.
+
+* Simon Kitching for ``String`` cleanups and optimization suggestions.
+
+* Michael Koch for configuration fixes, ``Locale`` updates, bug and
+  build fixes.
+
+* Guilhem Lavaux for configuration, thread and channel fixes and Kaffe
+  integration. JCL native ``Pointer`` updates. Logger bug fixes.
+
+* David Lichteblau for JCL support library global/local reference
+  cleanups.
+
+* Aaron Luchko for JDWP updates and documentation fixes.
+
+* Ziga Mahkovec for ``Graphics2D`` upgraded to Cairo 0.5 and new regex
+  features.
+
+* Sven de Marothy for BMP imageio support, CSS and ``TextLayout``
+  fixes. ``GtkImage`` rewrite, 2D, awt, free swing and date/time fixes and
+  implementing the Qt4 peers.
+
+* Casey Marshall for crypto algorithm fixes, ``FileChannel`` lock,
+  ``SystemLogger`` and ``FileHandler`` rotate implementations, NIO
+  ``FileChannel.map`` support, security and policy updates.
+
+* Bryce McKinlay for RMI work.
+
+* Audrius Meskauskas for lots of Free Corba, RMI and HTML work plus
+  testing and documenting.
+
+* Kalle Olavi Niemitalo for build fixes.
+
+* Rainer Orth for build fixes.
+
+* Andrew Overholt for ``File`` locking fixes.
+
+* Ingo Proetel for ``Image``, ``Logger`` and ``URLClassLoader``
+  updates.
+
+* Olga Rodimina for ``MenuSelectionManager`` implementation.
+
+* Jan Roehrich for ``BasicTreeUI`` and ``JTree`` fixes.
+
+* Julian Scheid for documentation updates and gjdoc support.
+
+* Christian Schlichtherle for zip fixes and cleanups.
+
+* Robert Schuster for documentation updates and beans fixes,
+  ``TreeNode`` enumerations and ``ActionCommand`` and various
+  fixes, XML and URL, AWT and Free Swing bug fixes.
+
+* Keith Seitz for lots of JDWP work.
+
+* Christian Thalinger for 64-bit cleanups, Configuration and VM
+  interface fixes and ``CACAO`` integration, ``fdlibm`` updates.
+
+* Gael Thomas for ``VMClassLoader`` boot packages support suggestions.
+
+* Andreas Tobler for Darwin and Solaris testing and fixing, ``Qt4``
+  support for Darwin/OS X, ``Graphics2D`` support, ``gtk+``
+  updates.
+
+* Dalibor Topic for better ``DEBUG`` support, build cleanups and
+  Kaffe integration. ``Qt4`` build infrastructure, ``SHA1PRNG``
+  and ``GdkPixbugDecoder`` updates.
+
+* Tom Tromey for Eclipse integration, generics work, lots of bug fixes
+  and gcj integration including coordinating The Big Merge.
+
+* Mark Wielaard for bug fixes, packaging and release management,
+  ``Clipboard`` implementation, system call interrupts and network
+  timeouts and ``GdkPixpufDecoder`` fixes.
+
+In addition to the above, all of which also contributed time and energy in
+testing GCC, we would like to thank the following for their contributions
+to testing:
+
+* Michael Abd-El-Malek
+
+* Thomas Arend
+
+* Bonzo Armstrong
+
+* Steven Ashe
+
+* Chris Baldwin
+
+* David Billinghurst
+
+* Jim Blandy
+
+* Stephane Bortzmeyer
+
+* Horst von Brand
+
+* Frank Braun
+
+* Rodney Brown
+
+* Sidney Cadot
+
+* Bradford Castalia
+
+* Robert Clark
+
+* Jonathan Corbet
+
+* Ralph Doncaster
+
+* Richard Emberson
+
+* Levente Farkas
+
+* Graham Fawcett
+
+* Mark Fernyhough
+
+* Robert A. French
+
+* Jörgen Freyh
+
+* Mark K. Gardner
+
+* Charles-Antoine Gauthier
+
+* Yung Shing Gene
+
+* David Gilbert
+
+* Simon Gornall
+
+* Fred Gray
+
+* John Griffin
+
+* Patrik Hagglund
+
+* Phil Hargett
+
+* Amancio Hasty
+
+* Takafumi Hayashi
+
+* Bryan W. Headley
+
+* Kevin B. Hendricks
+
+* Joep Jansen
+
+* Christian Joensson
+
+* Michel Kern
+
+* David Kidd
+
+* Tobias Kuipers
+
+* Anand Krishnaswamy
+
+* A.O.V. Le Blanc
+
+* llewelly
+
+* Damon Love
+
+* Brad Lucier
+
+* Matthias Klose
+
+* Martin Knoblauch
+
+* Rick Lutowski
+
+* Jesse Macnish
+
+* Stefan Morrell
+
+* Anon A. Mous
+
+* Matthias Mueller
+
+* Pekka Nikander
+
+* Rick Niles
+
+* Jon Olson
+
+* Magnus Persson
+
+* Chris Pollard
+
+* Richard Polton
+
+* Derk Reefman
+
+* David Rees
+
+* Paul Reilly
+
+* Tom Reilly
+
+* Torsten Rueger
+
+* Danny Sadinoff
+
+* Marc Schifer
+
+* Erik Schnetter
+
+* Wayne K. Schroll
+
+* David Schuler
+
+* Vin Shelton
+
+* Tim Souder
+
+* Adam Sulmicki
+
+* Bill Thorson
+
+* George Talbot
+
+* Pedro A. M. Vazquez
+
+* Gregory Warnes
+
+* Ian Watson
+
+* David E. Young
+
+* And many others
+
+And finally we'd like to thank everyone who uses the compiler, provides
+feedback and generally reminds us why we're doing this work in the first
+place.
\ No newline at end of file
diff --git a/doc/contribute.rst b/doc/contribute.rst
new file mode 100644
index 00000000000..643562efc63
--- /dev/null
+++ b/doc/contribute.rst
@@ -0,0 +1,21 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _contributing:
+
+Contributing to GCC Development
+-------------------------------
+
+If you would like to help pretest GCC releases to assure they work well,
+current development sources are available via Git (see
+https://gcc.gnu.org/git.html).  Source and binary snapshots are
+also available for FTP; see https://gcc.gnu.org/snapshots.html.
+
+If you would like to work on improvements to GCC, please read the
+advice at these URLs: https://gcc.gnu.org/contribute.html, https://gcc.gnu.org/contributewhy.html.
+
+for information on how to make useful contributions and avoid
+duplication of effort.  Suggested projects are listed at
+https://gcc.gnu.org/projects/.
\ No newline at end of file
diff --git a/doc/cppdiropts.rst b/doc/cppdiropts.rst
new file mode 100644
index 00000000000..91568fe5612
--- /dev/null
+++ b/doc/cppdiropts.rst
@@ -0,0 +1,217 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -I {dir}, -iquote {dir}, -isystem {dir}, -idirafter {dir}
+
+  Add the directory :samp:`{dir}` to the list of directories to be searched
+  for header files during preprocessing.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+  If :samp:`{dir}` begins with :samp:`=` or ``$SYSROOT``, then the :samp:`=`
+  or ``$SYSROOT`` is replaced by the sysroot prefix; see
+  :option:`--sysroot` and :option:`-isysroot`.
+
+  Directories specified with :option:`-iquote` apply only to the quote
+  form of the directive, ``#include "file"``.
+  Directories specified with :option:`-I`, :option:`-isystem`,
+  or :option:`-idirafter` apply to lookup for both the
+  ``#include "file"`` and
+  ``#include <file>`` directives.
+
+  You can specify any number or combination of these options on the
+  command line to search for header files in several directories.
+  The lookup order is as follows:
+
+  * For the quote form of the include directive, the directory of the current
+    file is searched first.
+
+  * For the quote form of the include directive, the directories specified
+    by :option:`-iquote` options are searched in left-to-right order,
+    as they appear on the command line.
+
+  * Directories specified with :option:`-I` options are scanned in
+    left-to-right order.
+
+  * Directories specified with :option:`-isystem` options are scanned in
+    left-to-right order.
+
+  * Standard system directories are scanned.
+
+  * Directories specified with :option:`-idirafter` options are scanned in
+    left-to-right order.
+
+  You can use :option:`-I` to override a system header
+  file, substituting your own version, since these directories are
+  searched before the standard system header file directories.
+  However, you should
+  not use this option to add directories that contain vendor-supplied
+  system header files; use :option:`-isystem` for that.
+
+  The :option:`-isystem` and :option:`-idirafter` options also mark the directory
+  as a system directory, so that it gets the same special treatment that
+  is applied to the standard system directories.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+  If a standard system include directory, or a directory specified with
+  :option:`-isystem`, is also specified with :option:`-I`, the :option:`-I`
+  option is ignored.  The directory is still searched but as a
+  system directory at its normal position in the system include chain.
+  This is to ensure that GCC's procedure to fix buggy system headers and
+  the ordering for the ``#include_next`` directive are not inadvertently
+  changed.
+  If you really need to change the search order for system directories,
+  use the :option:`-nostdinc` and/or :option:`-isystem` options.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+.. option:: -I-
+
+  Split the include path.
+  This option has been deprecated.  Please use :option:`-iquote` instead for
+  :option:`-I` directories before the :option:`-I-` and remove the :option:`-I-`
+  option.
+
+  Any directories specified with :option:`-I`
+  options before :option:`-I-` are searched only for headers requested with
+  ``#include "file"`` ; they are not searched for
+  ``#include <file>``.  If additional directories are
+  specified with :option:`-I` options after the :option:`-I-`, those
+  directories are searched for all :samp:`#include` directives.
+
+  In addition, :option:`-I-` inhibits the use of the directory of the current
+  file directory as the first search directory for ``#include
+  "file"``.  There is no way to override this effect of :option:`-I-`.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+
+.. option:: -iprefix {prefix}
+
+  Specify :samp:`{prefix}` as the prefix for subsequent :option:`-iwithprefix`
+  options.  If the prefix represents a directory, you should include the
+  final :samp:`/`.
+
+.. option:: -iwithprefix {dir}, -iwithprefixbefore {dir}
+
+  Append :samp:`{dir}` to the prefix specified previously with
+  :option:`-iprefix`, and add the resulting directory to the include search
+  path.  :option:`-iwithprefixbefore` puts it in the same place :option:`-I`
+  would; :option:`-iwithprefix` puts it where :option:`-idirafter` would.
+
+.. option:: -isysroot {dir}
+
+  This option is like the :option:`--sysroot` option, but applies only to
+  header files (except for Darwin targets, where it applies to both header
+  files and libraries).  See the :option:`--sysroot` option for more
+  information.
+
+.. option:: -imultilib {dir}
+
+  Use :samp:`{dir}` as a subdirectory of the directory containing
+  target-specific C++ headers.
+
+.. option:: -nostdinc
+
+  Do not search the standard system directories for header files.
+  Only the directories explicitly specified with :option:`-I`,
+  :option:`-iquote`, :option:`-isystem`, and/or :option:`-idirafter`
+  options (and the directory of the current file, if appropriate)
+  are searched.
+
+.. option:: -nostdinc++
+
+  Do not search for header files in the C++-specific standard directories,
+  but do still search the other standard directories.  (This option is
+  used when building the C++ library.)
+
+.. option:: -Wcomment, -Wcomments
+
+  Warn whenever a comment-start sequence :samp:`/*` appears in a :samp:`/*`
+  comment, or whenever a backslash-newline appears in a :samp:`//` comment.
+  This warning is enabled by :option:`-Wall`.
+
+.. option:: -Wtrigraphs
+
+.. _wtrigraphs:
+
+  Warn if any trigraphs are encountered that might change the meaning of
+  the program.  Trigraphs within comments are not warned about,
+  except those that would form escaped newlines.
+
+  This option is implied by :option:`-Wall`.  If :option:`-Wall` is not
+  given, this option is still enabled unless trigraphs are enabled.  To
+  get trigraph conversion without warnings, but get the other
+  :option:`-Wall` warnings, use :samp:`-trigraphs -Wall -Wno-trigraphs`.
+
+.. option:: -Wundef
+
+  Warn if an undefined identifier is evaluated in an ``#if`` directive.
+  Such identifiers are replaced with zero.
+
+.. option:: -Wno-undef
+
+  Default setting; overrides :option:`-Wundef`.
+
+.. option:: -Wexpansion-to-defined
+
+  Warn whenever :samp:`defined` is encountered in the expansion of a macro
+  (including the case where the macro is expanded by an :samp:`#if` directive).
+  Such usage is not portable.
+  This warning is also enabled by :option:`-Wpedantic` and :option:`-Wextra`.
+
+.. option:: -Wunused-macros
+
+  Warn about macros defined in the main file that are unused.  A macro
+  is :dfn:`used` if it is expanded or tested for existence at least once.
+  The preprocessor also warns if the macro has not been used at the
+  time it is redefined or undefined.
+
+  Built-in macros, macros defined on the command line, and macros
+  defined in include files are not warned about.
+
+  .. note::
+
+    If a macro is actually used, but only used in skipped
+    conditional blocks, then the preprocessor reports it as unused.  To avoid the
+    warning in such a case, you might improve the scope of the macro's
+    definition by, for example, moving it into the first skipped block.
+    Alternatively, you could provide a dummy use with something like:
+
+  .. code-block:: c++
+
+    #if defined the_macro_causing_the_warning
+    #endif
+
+.. option:: -Wno-endif-labels
+
+  Do not warn whenever an ``#else`` or an ``#endif`` are followed by text.
+  This sometimes happens in older programs with code of the form
+
+  .. code-block:: c++
+
+    #if FOO
+    ...
+    #else FOO
+    ...
+    #endif FOO
+
+  The second and third ``FOO`` should be in comments.
+  This warning is on by default.
+
+.. option:: -Wendif-labels
+
+  Default setting; overrides :option:`-Wno-endif-labels`.
\ No newline at end of file
diff --git a/doc/cppenv.rst b/doc/cppenv.rst
new file mode 100644
index 00000000000..f27338cfa2f
--- /dev/null
+++ b/doc/cppenv.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. envvar:: CPATH, C_INCLUDE_PATH, CPLUS_INCLUDE_PATH, OBJC_INCLUDE_PATH
+
+  .. Commented out until ObjC++ is part of GCC:
+     @itemx OBJCPLUS_INCLUDE_PATH
+
+  Each variable's value is a list of directories separated by a special
+  character, much like :envvar:`PATH`, in which to look for header files.
+  The special character, ``PATH_SEPARATOR``, is target-dependent and
+  determined at GCC build time.  For Microsoft Windows-based targets it is a
+  semicolon, and for almost all other targets it is a colon.
+
+  :envvar:`CPATH` specifies a list of directories to be searched as if
+  specified with :option:`-I`, but after any paths given with :option:`-I`
+  options on the command line.  This environment variable is used
+  regardless of which language is being preprocessed.
+
+  The remaining environment variables apply only when preprocessing the
+  particular language indicated.  Each specifies a list of directories
+  to be searched as if specified with :option:`-isystem`, but after any
+  paths given with :option:`-isystem` options on the command line.
+
+  In all these variables, an empty element instructs the compiler to
+  search its current working directory.  Empty elements can appear at the
+  beginning or end of a path.  For instance, if the value of
+  :envvar:`CPATH` is ``:/special/include``, that has the same
+  effect as :samp:`-I. -I/special/include`.
+
+  .. only:: cpp
+
+    See also :ref:`search-path`.
+
+.. index:: dependencies for make as output
+
+.. envvar:: DEPENDENCIES_OUTPUT
+
+  If this variable is set, its value specifies how to output
+  dependencies for Make based on the non-system header files processed
+  by the compiler.  System header files are ignored in the dependency
+  output.
+
+  The value of :envvar:`DEPENDENCIES_OUTPUT` can be just a file name, in
+  which case the Make rules are written to that file, guessing the target
+  name from the source file name.  Or the value can have the form
+  :samp:`{file}{target}`, in which case the rules are written to
+  file :samp:`{file}` using :samp:`{target}` as the target name.
+
+  In other words, this environment variable is equivalent to combining
+  the options :option:`-MM` and :option:`-MF`
+
+  .. only:: cpp
+
+    (see :ref:`invocation`),
+
+  .. only:: not cpp
+
+    (see :ref:`preprocessor-options`),
+
+  with an optional :option:`-MT` switch too.
+
+.. index:: dependencies for make as output
+
+.. envvar:: SUNPRO_DEPENDENCIES
+
+  This variable is the same as :envvar:`DEPENDENCIES_OUTPUT` (see above),
+  except that system header files are not ignored, so it implies
+  :option:`-M` rather than :option:`-MM`.  However, the dependence on the
+  main input file is omitted.
+
+  .. only:: cpp
+
+    See :ref:`invocation`.
+
+  .. only:: not cpp
+
+    See :ref:`preprocessor-options`.
+
+.. envvar:: SOURCE_DATE_EPOCH
+
+  If this variable is set, its value specifies a UNIX timestamp to be
+  used in replacement of the current date and time in the ``__DATE__``
+  and ``__TIME__`` macros, so that the embedded timestamps become
+  reproducible.
+
+  The value of :envvar:`SOURCE_DATE_EPOCH` must be a UNIX timestamp,
+  defined as the number of seconds (excluding leap seconds) since
+  01 Jan 1970 00:00:00 represented in ASCII; identical to the output of
+  ``date +%s`` on GNU/Linux and other systems that support the
+  ``%s`` extension in the ``date`` command.
+
+  The value should be a known timestamp such as the last modification
+  time of the source or package and it should be set by the build
+  process.
\ No newline at end of file
diff --git a/doc/cppopts.rst b/doc/cppopts.rst
new file mode 100644
index 00000000000..60d663e35d8
--- /dev/null
+++ b/doc/cppopts.rst
@@ -0,0 +1,556 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -D {name}
+
+  Predefine :samp:`{name}` as a macro, with definition ``1``.
+
+.. option:: -D name=definition
+
+  The contents of :samp:`{definition}` are tokenized and processed as if
+  they appeared during translation phase three in a :samp:`#define`
+  directive.  In particular, the definition is truncated by
+  embedded newline characters.
+
+  If you are invoking the preprocessor from a shell or shell-like
+  program you may need to use the shell's quoting syntax to protect
+  characters such as spaces that have a meaning in the shell syntax.
+
+  If you wish to define a function-like macro on the command line, write
+  its argument list with surrounding parentheses before the equals sign
+  (if any).  Parentheses are meaningful to most shells, so you should
+  quote the option.  With :command:`sh` and :command:`csh`,
+  :option:`-D'name(args...)=definition'` works.
+
+  :option:`-D` and :option:`-U` options are processed in the order they
+  are given on the command line.  All :option:`-imacros file` and
+  :option:`-include file` options are processed after all
+  :option:`-D` and :option:`-U` options.
+
+.. option:: -U {name}
+
+  Cancel any previous definition of :samp:`{name}`, either built in or
+  provided with a :option:`-D` option.
+
+.. option:: -include {file}
+
+  Process :samp:`{file}` as if ``#include "file"`` appeared as the first
+  line of the primary source file.  However, the first directory searched
+  for :samp:`{file}` is the preprocessor's working directory *instead of*
+  the directory containing the main source file.  If not found there, it
+  is searched for in the remainder of the ``#include "..."`` search
+  chain as normal.
+
+  If multiple :option:`-include` options are given, the files are included
+  in the order they appear on the command line.
+
+.. option:: -imacros {file}
+
+  Exactly like :option:`-include`, except that any output produced by
+  scanning :samp:`{file}` is thrown away.  Macros it defines remain defined.
+  This allows you to acquire all the macros from a header without also
+  processing its declarations.
+
+  All files specified by :option:`-imacros` are processed before all files
+  specified by :option:`-include`.
+
+.. option:: -undef
+
+  Do not predefine any system-specific or GCC-specific macros.  The
+  standard predefined macros remain defined.
+
+  .. only:: cpp
+
+    See :ref:`standard-predefined-macros`.
+
+.. option:: -pthread
+
+  Define additional macros required for using the POSIX threads library.
+  You should use this option consistently for both compilation and linking.
+  This option is supported on GNU/Linux targets, most other Unix derivatives,
+  and also on x86 Cygwin and MinGW targets.
+
+.. index:: make, dependencies, make
+
+.. option:: -M
+
+  Instead of outputting the result of preprocessing, output a rule
+  suitable for :command:`make` describing the dependencies of the main
+  source file.  The preprocessor outputs one :command:`make` rule containing
+  the object file name for that source file, a colon, and the names of all
+  the included files, including those coming from :option:`-include` or
+  :option:`-imacros` command-line options.
+
+  Unless specified explicitly (with :option:`-MT` or :option:`-MQ`), the
+  object file name consists of the name of the source file with any
+  suffix replaced with object file suffix and with any leading directory
+  parts removed.  If there are many included files then the rule is
+  split into several lines using :samp:`\\` -newline.  The rule has no
+  commands.
+
+  This option does not suppress the preprocessor's debug output, such as
+  :option:`-dM`.  To avoid mixing such debug output with the dependency
+  rules you should explicitly specify the dependency output file with
+  :option:`-MF`, or use an environment variable like
+  :envvar:`DEPENDENCIES_OUTPUT` (see :ref:`environment-variables`).  Debug output
+  is still sent to the regular output stream as normal.
+
+  Passing :option:`-M` to the driver implies :option:`-E`, and suppresses
+  warnings with an implicit :option:`-w`.
+
+.. option:: -MM
+
+  Like :option:`-M` but do not mention header files that are found in
+  system header directories, nor header files that are included,
+  directly or indirectly, from such a header.
+
+  This implies that the choice of angle brackets or double quotes in an
+  :samp:`#include` directive does not in itself determine whether that
+  header appears in :option:`-MM` dependency output.
+
+.. option:: -MF {file}
+
+  When used with :option:`-M` or :option:`-MM`, specifies a
+  file to write the dependencies to.  If no :option:`-MF` switch is given
+  the preprocessor sends the rules to the same place it would send
+  preprocessed output.
+
+  When used with the driver options :option:`-MD` or :option:`-MMD`,
+  :option:`-MF` overrides the default dependency output file.
+
+  If :samp:`{file}` is :samp:`-`, then the dependencies are written to :samp:`stdout`.
+
+.. option:: -MG
+
+  In conjunction with an option such as :option:`-M` requesting
+  dependency generation, :option:`-MG` assumes missing header files are
+  generated files and adds them to the dependency list without raising
+  an error.  The dependency filename is taken directly from the
+  ``#include`` directive without prepending any path.  :option:`-MG`
+  also suppresses preprocessed output, as a missing header file renders
+  this useless.
+
+  This feature is used in automatic updating of makefiles.
+
+.. option:: -Mno-modules
+
+  Disable dependency generation for compiled module interfaces.
+
+.. option:: -MP
+
+  This option instructs CPP to add a phony target for each dependency
+  other than the main file, causing each to depend on nothing.  These
+  dummy rules work around errors :command:`make` gives if you remove header
+  files without updating the :samp:`Makefile` to match.
+
+  This is typical output:
+
+  .. code-block:: c++
+
+    test.o: test.c test.h
+
+    test.h:
+
+.. option:: -MT {target}
+
+  Change the target of the rule emitted by dependency generation.  By
+  default CPP takes the name of the main input file, deletes any
+  directory components and any file suffix such as :samp:`.c`, and
+  appends the platform's usual object suffix.  The result is the target.
+
+  An :option:`-MT` option sets the target to be exactly the string you
+  specify.  If you want multiple targets, you can specify them as a single
+  argument to :option:`-MT`, or use multiple :option:`-MT` options.
+
+  For example, ``-MT '$(objpfx)foo.o'`` might give
+
+  .. code-block:: c++
+
+    $(objpfx)foo.o: foo.c
+
+.. option:: -MQ {target}
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  Make. ``-MQ '$(objpfx)foo.o'`` gives
+
+  .. code-block:: c++
+
+    $$(objpfx)foo.o: foo.c
+
+  The default target is automatically quoted, as if it were given with
+  :option:`-MQ`.
+
+.. option:: -MD
+
+  :option:`-MD` is equivalent to :option:`-M -MF file`, except that
+  :option:`-E` is not implied.  The driver determines :samp:`{file}` based on
+  whether an :option:`-o` option is given.  If it is, the driver uses its
+  argument but with a suffix of :samp:`.d`, otherwise it takes the name
+  of the input file, removes any directory components and suffix, and
+  applies a :samp:`.d` suffix.
+
+  If :option:`-MD` is used in conjunction with :option:`-E`, any
+  :option:`-o` switch is understood to specify the dependency output file
+  (see :option:`-MF`), but if used without :option:`-E`, each :option:`-o`
+  is understood to specify a target object file.
+
+  Since :option:`-E` is not implied, :option:`-MD` can be used to generate
+  a dependency output file as a side effect of the compilation process.
+
+.. option:: -MMD
+
+  Like :option:`-MD` except mention only user header files, not system
+  header files.
+
+.. option:: -fpreprocessed
+
+  Indicate to the preprocessor that the input file has already been
+  preprocessed.  This suppresses things like macro expansion, trigraph
+  conversion, escaped newline splicing, and processing of most directives.
+  The preprocessor still recognizes and removes comments, so that you can
+  pass a file preprocessed with :option:`-C` to the compiler without
+  problems.  In this mode the integrated preprocessor is little more than
+  a tokenizer for the front ends.
+
+  :option:`-fpreprocessed` is implicit if the input file has one of the
+  extensions :samp:`.i`, :samp:`.ii` or :samp:`.mi`.  These are the
+  extensions that GCC uses for preprocessed files created by
+  :option:`-save-temps`.
+
+.. option:: -fdirectives-only
+
+  When preprocessing, handle directives, but do not expand macros.
+
+  The option's behavior depends on the :option:`-E` and :option:`-fpreprocessed`
+  options.
+
+  With :option:`-E`, preprocessing is limited to the handling of directives
+  such as ``#define``, ``#ifdef``, and ``#error``.  Other
+  preprocessor operations, such as macro expansion and trigraph
+  conversion are not performed.  In addition, the :option:`-dD` option is
+  implicitly enabled.
+
+  With :option:`-fpreprocessed`, predefinition of command line and most
+  builtin macros is disabled.  Macros such as ``__LINE__``, which are
+  contextually dependent, are handled normally.  This enables compilation of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+  With both :option:`-E` and :option:`-fpreprocessed`, the rules for
+  :option:`-fpreprocessed` take precedence.  This enables full preprocessing of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+.. option:: -fdollars-in-identifiers
+
+  Accept :samp:`$` in identifiers.
+
+  .. only:: cpp
+
+    See :ref:`identifier-characters`.
+
+.. option:: -fextended-identifiers
+
+  Accept universal character names and extended characters in
+  identifiers.  This option is enabled by default for C99 (and later C
+  standard versions) and C++.
+
+.. option:: -fno-canonical-system-headers
+
+  When preprocessing, do not shorten system header paths with canonicalization.
+
+.. option:: -fmax-include-depth={depth}
+
+  Set the maximum depth of the nested #include. The default is 200.
+
+.. option:: -ftabstop={width}
+
+  Set the distance between tab stops.  This helps the preprocessor report
+  correct column numbers in warnings or errors, even if tabs appear on the
+  line.  If the value is less than 1 or greater than 100, the option is
+  ignored.  The default is 8.
+
+.. option:: -ftrack-macro-expansion[={level}]
+
+  Track locations of tokens across macro expansions. This allows the
+  compiler to emit diagnostic about the current macro expansion stack
+  when a compilation error occurs in a macro expansion. Using this
+  option makes the preprocessor and the compiler consume more
+  memory. The :samp:`{level}` parameter can be used to choose the level of
+  precision of token location tracking thus decreasing the memory
+  consumption if necessary. Value :samp:`0` of :samp:`{level}` de-activates
+  this option. Value :samp:`1` tracks tokens locations in a
+  degraded mode for the sake of minimal memory overhead. In this mode
+  all tokens resulting from the expansion of an argument of a
+  function-like macro have the same location. Value :samp:`2` tracks
+  tokens locations completely. This value is the most memory hungry.
+  When this option is given no argument, the default parameter value is
+  :samp:`2`.
+
+  Note that ``-ftrack-macro-expansion=2`` is activated by default.
+
+.. option:: -fmacro-prefix-map={old}={new}
+
+  When preprocessing files residing in directory :samp:`{old}`,
+  expand the ``__FILE__`` and ``__BASE_FILE__`` macros as if the
+  files resided in directory :samp:`{new}` instead.  This can be used
+  to change an absolute path to a relative path by using :samp:`.` for
+  :samp:`{new}` which can result in more reproducible builds that are
+  location independent.  This option also affects
+  ``__builtin_FILE()`` during compilation.  See also
+  :option:`-ffile-prefix-map`.
+
+.. index:: character set, execution
+
+.. option:: -fexec-charset={charset}
+
+  Set the execution character set, used for string and character
+  constants.  The default is UTF-8.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. index:: character set, wide execution
+
+.. option:: -fwide-exec-charset={charset}
+
+  Set the wide execution character set, used for wide string and
+  character constants.  The default is one of UTF-32BE, UTF-32LE, UTF-16BE,
+  or UTF-16LE, whichever corresponds to the width of ``wchar_t`` and the
+  big-endian or little-endian byte order being used for code generation.  As
+  with :option:`-fexec-charset`, :samp:`{charset}` can be any encoding supported
+  by the system's ``iconv`` library routine; however, you will have
+  problems with encodings that do not fit exactly in ``wchar_t``.
+
+.. index:: character set, input
+
+.. option:: -finput-charset={charset}
+
+  Set the input character set, used for translation from the character
+  set of the input file to the source character set used by GCC.  If the
+  locale does not specify, or GCC cannot get this information from the
+  locale, the default is UTF-8.  This can be overridden by either the locale
+  or this command-line option.  Currently the command-line option takes
+  precedence if there's a conflict.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. only:: not cpp
+
+  .. option:: -fpch-deps
+
+    When using precompiled headers (see :ref:`precompiled-headers`), this flag
+    causes the dependency-output flags to also list the files from the
+    precompiled header's dependencies.  If not specified, only the
+    precompiled header are listed and not the files that were used to
+    create it, because those files are not consulted when a precompiled
+    header is used.
+
+  .. option:: -fpch-preprocess
+
+    This option allows use of a precompiled header (see :ref:`precompiled-headers`) together with :option:`-E`.  It inserts a special ``#pragma``,
+    ``#pragma GCC pch_preprocess "filename"`` in the output to mark
+    the place where the precompiled header was found, and its :samp:`{filename}`.
+    When :option:`-fpreprocessed` is in use, GCC recognizes this ``#pragma``
+    and loads the PCH.
+
+    This option is off by default, because the resulting preprocessed output
+    is only really suitable as input to GCC.  It is switched on by
+    :option:`-save-temps`.
+
+    You should not write this ``#pragma`` in your own code, but it is
+    safe to edit the filename if the PCH file is available in a different
+    location.  The filename may be absolute or it may be relative to GCC's
+    current directory.
+
+.. option:: -fworking-directory
+
+  Enable generation of linemarkers in the preprocessor output that
+  let the compiler know the current working directory at the time of
+  preprocessing.  When this option is enabled, the preprocessor
+  emits, after the initial linemarker, a second linemarker with the
+  current working directory followed by two slashes.  GCC uses this
+  directory, when it's present in the preprocessed input, as the
+  directory emitted as the current working directory in some debugging
+  information formats.  This option is implicitly enabled if debugging
+  information is enabled, but this can be inhibited with the negated
+  form :option:`-fno-working-directory`.  If the :option:`-P` flag is
+  present in the command line, this option has no effect, since no
+  ``#line`` directives are emitted whatsoever.
+
+.. option:: -fno-working-directory
+
+  Default setting; overrides :option:`-fworking-directory`.
+
+.. option:: -A {predicate}={answer}
+
+  Make an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.  This form is preferred to the older form :option:`-A
+  predicate(answer)`, which is still supported, because
+  it does not use shell special characters.
+
+  .. only:: cpp
+
+    See :ref:`obsolete-features`.
+
+.. option:: -A -predicate=answer
+
+  Cancel an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.
+
+.. option:: -C
+
+  Do not discard comments.  All comments are passed through to the output
+  file, except for comments in processed directives, which are deleted
+  along with the directive.
+
+  You should be prepared for side effects when using :option:`-C` ; it
+  causes the preprocessor to treat comments as tokens in their own right.
+  For example, comments appearing at the start of what would be a
+  directive line have the effect of turning that line into an ordinary
+  source line, since the first token on the line is no longer a :samp:`#`.
+
+.. option:: -CC
+
+  Do not discard comments, including during macro expansion.  This is
+  like :option:`-C`, except that comments contained within macros are
+  also passed through to the output file where the macro is expanded.
+
+  In addition to the side effects of the :option:`-C` option, the
+  :option:`-CC` option causes all C++-style comments inside a macro
+  to be converted to C-style comments.  This is to prevent later use
+  of that macro from inadvertently commenting out the remainder of
+  the source line.
+
+  The :option:`-CC` option is generally used to support lint comments.
+
+.. option:: -P
+
+  Inhibit generation of linemarkers in the output from the preprocessor.
+  This might be useful when running the preprocessor on something that is
+  not C code, and will be sent to a program which might be confused by the
+  linemarkers.
+
+  .. only:: cpp
+
+    See :ref:`preprocessor-output`.
+
+  .. index:: traditional C language, C language, traditional
+
+.. option:: -traditional, -traditional-cpp
+
+  Try to imitate the behavior of pre-standard C preprocessors, as
+  opposed to ISO C preprocessors.
+
+  .. only:: cpp
+
+    See :ref:`traditional-mode`.
+
+  .. only:: not cpp
+
+    See the GNU CPP manual for details.
+
+  Note that GCC does not otherwise attempt to emulate a pre-standard
+  C compiler, and these options are only supported with the :option:`-E`
+  switch, or when invoking CPP explicitly.
+
+.. option:: -trigraphs
+
+  Support ISO C trigraphs.
+  These are three-character sequences, all starting with :samp:`??`, that
+  are defined by ISO C to stand for single characters.  For example,
+  :samp:`??/` stands for :samp:`\\`, so :samp:`??/n` is a character
+  constant for a newline.
+
+  .. only:: cpp
+
+    See :ref:`initial-processing`.
+
+  .. only:: not cpp
+
+    The nine trigraphs and their replacements are
+
+    .. code-block::
+
+      Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+      Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+  By default, GCC ignores trigraphs, but in
+  standard-conforming modes it converts them.  See the :option:`-std` and
+  :option:`-ansi` options.
+
+.. option:: -remap
+
+  Enable special code to work around file systems which only permit very
+  short file names, such as MS-DOS.
+
+.. option:: -H
+
+  Print the name of each header file used, in addition to other normal
+  activities.  Each name is indented to show how deep in the
+  :samp:`#include` stack it is.  Precompiled header files are also
+  printed, even if they are found to be invalid; an invalid precompiled
+  header file is printed with :samp:`...x` and a valid one with :samp:`...!` .
+
+.. option:: -dletters
+
+  Says to make debugging dumps during compilation as specified by
+  :samp:`{letters}`.  The flags documented here are those relevant to the
+  preprocessor.  Other :samp:`{letters}` are interpreted
+  by the compiler proper, or reserved for future versions of GCC, and so
+  are silently ignored.  If you specify :samp:`{letters}` whose behavior
+  conflicts, the result is undefined.
+
+  .. only:: not cpp
+
+    See :ref:`developer-options`, for more information.
+
+  .. option:: -dM
+
+    Instead of the normal output, generate a list of :samp:`#define`
+    directives for all the macros defined during the execution of the
+    preprocessor, including predefined macros.  This gives you a way of
+    finding out what is predefined in your version of the preprocessor.
+    Assuming you have no file :samp:`foo.h`, the command
+
+    .. code-block:: c++
+
+      touch foo.h; cpp -dM foo.h
+
+    shows all the predefined macros.
+
+    .. only:: cpp
+
+      If you use :option:`-dM` without the :option:`-E` option, :option:`-dM` is
+      interpreted as a synonym for :option:`-fdump-rtl-mach`.
+      See :ref:`developer-options`.
+
+  .. option:: -dD
+
+    Like :option:`-dM` except in two respects: it does *not* include the
+    predefined macros, and it outputs *both* the :samp:`#define`
+    directives and the result of preprocessing.  Both kinds of output go to
+    the standard output file.
+
+  .. option:: -dN
+
+    Like :option:`-dD`, but emit only the macro names, not their expansions.
+
+  .. option:: -dI
+
+    Output :samp:`#include` directives in addition to the result of
+    preprocessing.
+
+  .. option:: -dU
+
+    Like :option:`-dD` except that only macros that are expanded, or whose
+    definedness is tested in preprocessor directives, are output; the
+    output is delayed until the use or test of the macro; and
+    :samp:`#undef` directives are also output for macros tested but
+    undefined at the time.
+
+.. option:: -fdebug-cpp
+
+  This option is only useful for debugging GCC.  When used from CPP or with
+  :option:`-E`, it dumps debugging information about location maps.  Every
+  token in the output is preceded by the dump of the map its location
+  belongs to.
+
+  When used from GCC without :option:`-E`, this option has no effect.
\ No newline at end of file
diff --git a/doc/cppwarnopts.rst b/doc/cppwarnopts.rst
new file mode 100644
index 00000000000..8e9e9e7276f
--- /dev/null
+++ b/doc/cppwarnopts.rst
@@ -0,0 +1,4 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
\ No newline at end of file
diff --git a/doc/favicon.ico b/doc/favicon.ico
new file mode 100644
index 00000000000..42e8969edc8
Binary files /dev/null and b/doc/favicon.ico differ
diff --git a/doc/funding.rst b/doc/funding.rst
new file mode 100644
index 00000000000..ee4daca6fd7
--- /dev/null
+++ b/doc/funding.rst
@@ -0,0 +1,47 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+Funding Free Software
+=====================
+
+If you want to have more free software a few years from now, it makes
+sense for you to help encourage people to contribute funds for its
+development.  The most effective approach known is to encourage
+commercial redistributors to donate.
+
+Users of free software systems can boost the pace of development by
+encouraging for-a-fee distributors to donate part of their selling price
+to free software developers-the Free Software Foundation, and others.
+
+The way to convince distributors to do this is to demand it and expect
+it from them.  So when you compare distributors, judge them partly by
+how much they give to free software development.  Show distributors
+they must compete to be the one who gives the most.
+
+To make this approach work, you must insist on numbers that you can
+compare, such as, 'We will donate ten dollars to the Frobnitz project
+for each disk sold.'  Don't be satisfied with a vague promise, such as
+'A portion of the profits are donated,' since it doesn't give a basis
+for comparison.
+
+Even a precise fraction 'of the profits from this disk' is not very
+meaningful, since creative accounting and unrelated business decisions
+can greatly alter what fraction of the sales price counts as profit.
+If the price you pay is $50, ten percent of the profit is probably
+less than a dollar; it might be a few cents, or nothing at all.
+
+Some redistributors do development work themselves.  This is useful too;
+but to keep everyone honest, you need to inquire how much they do, and
+what kind.  Some kinds of development make much more long-term
+difference than others.  For example, maintaining a separate version of
+a program contributes very little; maintaining the standard version of a
+program for the whole community contributes much.  Easy new ports
+contribute little, since someone else would surely do them; difficult
+ports such as adding a new CPU to the GNU Compiler Collection contribute more;
+major new features or packages contribute the most.
+
+By establishing the idea that supporting further development is 'the
+proper thing to do' when distributing free software for a fee, we can
+assure a steady flow of resources into making more free software.
\ No newline at end of file
diff --git a/doc/gcc_sphinx.py b/doc/gcc_sphinx.py
new file mode 100644
index 00000000000..2ef15aef944
--- /dev/null
+++ b/doc/gcc_sphinx.py
@@ -0,0 +1,44 @@
+# GCC Sphinx customization
+
+__version__ = '1.0'
+
+
+def setup(app):
+    app.add_object_type('gcc-attr', 'gcc-attr', objname='GCC attribute',
+                        indextemplate='pair: %s; attribute')
+    app.add_object_type('fn-attr', 'fn-attr', objname='function attribute',
+                        indextemplate='pair: %s; function attribute')
+    app.add_object_type('var-attr', 'var-attr', objname='variable attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('type-attr', 'type-attr', objname='type attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('enum-attr', 'enum-attr', objname='Enumerator attribute',
+                        indextemplate='pair: %s; enumerator attribute')
+    app.add_object_type('label-attr', 'label-attr', objname='Label attribute',
+                        indextemplate='pair: %s; label attribute')
+    app.add_object_type('gcc-param', 'gcc-param', objname='GCC parameter',
+                        indextemplate='pair: %s; parameter')
+
+    targets = (('AArch64 ', 'aarch64'), ('AMD GCN ', 'amd-gcn'), ('ARC ', 'arc'), ('ARM ', 'arm'), ('AVR ', 'avr'),
+               ('Blackfin ', 'blackfin'), ('BPF ', 'bpf'), ('C-SKY ', 'c-sky'),
+               ('Epiphany ', 'epiphany'), ('H8/300 ', 'h8-300'), ('IA-64 ', 'ia-64'), ('LoongArch', 'loongarch'), ('M32C ', 'm32c'),
+               ('M32R/D ', 'm32r-d'), ('m68k ', 'm68k'), ('MCORE ', 'mcore'), ('MeP ', 'mep'),
+               ('MicroBlaze ', 'microblaze'), ('Microsoft Windows ', 'microsoft-windows'), ('MIPS ', 'mips'),
+               ('MSP430 ', 'msp430'), ('NDS32 ', 'nds32'), ('Nios II ', 'nios-ii'), ('Nvidia PTX ', 'nvidia-ptx'),
+               ('PowerPC ', 'powerpc'), ('RISC-V ', 'risc-v'), ('RL78 ', 'rl78'), ('RX ', 'rx'), ('S/390 ', 's-390'),
+               ('SH ', 'sh'), ('Symbian OS ', 'symbian-os'), ('V850 ', 'v850'), ('Visium ', 'visium'), ('x86 ', 'x86'),
+               ('Xstormy16 ', 'xstormy16'))
+
+    for target_name, target in targets:
+        app.add_object_type(f'{target}-fn-attr', f'{target}-fn-attr', objname=f'{target_name} function attribute',
+                            indextemplate=f'pair: %s; {target_name} function attribute')
+        app.add_object_type(f'{target}-var-attr', f'{target}-var-attr', objname=f'{target_name} variable attribute',
+                            indextemplate=f'pair: %s; {target_name} variable attribute')
+        app.add_object_type(f'{target}-type-attr', f'{target}-type-attr', objname=f'{target_name} type attribute',
+                            indextemplate=f'pair: %s; {target_name} type attribute')
+
+    return dict(
+        version=__version__,
+        parallel_read_safe=True,
+        parallel_write_safe=True
+    )
diff --git a/doc/gnu.rst b/doc/gnu.rst
new file mode 100644
index 00000000000..930659b250b
--- /dev/null
+++ b/doc/gnu.rst
@@ -0,0 +1,19 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu-project:
+
+The GNU Project and GNU/Linux
+=============================
+
+The GNU Project was launched in 1984 to develop a complete Unix-like
+operating system which is free software: the GNU system.  (GNU is a
+recursive acronym for 'GNU's Not Unix'; it is pronounced
+'guh-NEW'.)  Variants of the GNU operating system, which use the
+kernel Linux, are now widely used; though these systems are often
+referred to as 'Linux', they are more accurately called GNU/Linux
+systems.
+
+For more information, see: https://www.gnu.org/ and https://www.gnu.org/gnu/linux-and-gnu.html.
\ No newline at end of file
diff --git a/doc/gnu_free_documentation_license.rst b/doc/gnu_free_documentation_license.rst
new file mode 100644
index 00000000000..5a7d110efde
--- /dev/null
+++ b/doc/gnu_free_documentation_license.rst
@@ -0,0 +1,476 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu_fdl:
+
+******************************
+GNU Free Documentation License
+******************************
+
+Version 1.3, 3 November 2008
+
+Copyright  2000, 2001, 2002, 2007, 2008  Free Software Foundation, Inc
+https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+~~~~~~~~
+
+The purpose of this License is to make a manual, textbook, or other
+functional and useful document "free" in the sense of freedom: to
+assure everyone the effective freedom to copy and redistribute it,
+with or without modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and publisher a way
+to get credit for their work, while not being considered responsible
+for modifications made by others.
+
+This License is a kind of "copyleft", which means that derivative
+works of the document must themselves be free in the same sense.  It
+complements the GNU General Public License, which is a copyleft
+license designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free
+program should come with manuals providing the same freedoms that the
+software does.  But this License is not limited to software manuals;
+it can be used for any textual work, regardless of subject matter or
+whether it is published as a printed book.  We recommend this License
+principally for works whose purpose is instruction or reference.
+
+1. APPLICABILITY AND DEFINITIONS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This License applies to any manual or other work, in any medium, that
+contains a notice placed by the copyright holder saying it can be
+distributed under the terms of this License.  Such a notice grants a
+world-wide, royalty-free license, unlimited in duration, to use that
+work under the conditions stated herein.  The **Document**, below,
+refers to any such manual or work.  Any member of the public is a
+licensee, and is addressed as "**you**".  You accept the license if you
+copy, modify or distribute the work in a way requiring permission
+under copyright law.
+
+A "**Modified Version**" of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+A "**Secondary Section**" is a named appendix or a front-matter section of
+the Document that deals exclusively with the relationship of the
+publishers or authors of the Document to the Document's overall subject
+(or to related matters) and contains nothing that could fall directly
+within that overall subject.  (Thus, if the Document is in part a
+textbook of mathematics, a Secondary Section may not explain any
+mathematics.)  The relationship could be a matter of historical
+connection with the subject or with related matters, or of legal,
+commercial, philosophical, ethical or political position regarding
+them.
+
+The "**Invariant Sections**" are certain Secondary Sections whose titles
+are designated, as being those of Invariant Sections, in the notice
+that says that the Document is released under this License.  If a
+section does not fit the above definition of Secondary then it is not
+allowed to be designated as Invariant.  The Document may contain zero
+Invariant Sections.  If the Document does not identify any Invariant
+Sections then there are none.
+
+The "**Cover Texts**" are certain short passages of text that are listed,
+as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+the Document is released under this License.  A Front-Cover Text may
+be at most 5 words, and a Back-Cover Text may be at most 25 words.
+
+A "**Transparent**" copy of the Document means a machine-readable copy,
+represented in a format whose specification is available to the
+general public, that is suitable for revising the document
+straightforwardly with generic text editors or (for images composed of
+pixels) generic paint programs or (for drawings) some widely available
+drawing editor, and that is suitable for input to text formatters or
+for automatic translation to a variety of formats suitable for input
+to text formatters.  A copy made in an otherwise Transparent file
+format whose markup, or absence of markup, has been arranged to thwart
+or discourage subsequent modification by readers is not Transparent.
+An image format is not Transparent if used for any substantial amount
+of text.  A copy that is not "Transparent" is called **Opaque**.
+
+Examples of suitable formats for Transparent copies include plain
+ASCII without markup, Texinfo input format, LaTeX input format, SGML
+or XML using a publicly available DTD, and standard-conforming simple
+HTML, PostScript or PDF designed for human modification.  Examples of
+transparent image formats include PNG, XCF and JPG.  Opaque formats
+include proprietary formats that can be read and edited only by
+proprietary word processors, SGML or XML for which the DTD and/or
+processing tools are not generally available, and the
+machine-generated HTML, PostScript or PDF produced by some word
+processors for output purposes only.
+
+The "**Title Page**" means, for a printed book, the title page itself,
+plus such following pages as are needed to hold, legibly, the material
+this License requires to appear in the title page.  For works in
+formats which do not have any title page as such, "Title Page" means
+the text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+The "**publisher**" means any person or entity that distributes
+copies of the Document to the public.
+
+A section "**Entitled XYZ**" means a named subunit of the Document whose
+title either is precisely XYZ or contains XYZ in parentheses following
+text that translates XYZ in another language.  (Here XYZ stands for a
+specific section name mentioned below, such as "**Acknowledgements**",
+"**Dedications**", "**Endorsements**", or "**History**".)
+To "**Preserve the Title**"
+of such a section when you modify the Document means that it remains a
+section "Entitled XYZ" according to this definition.
+
+The Document may include Warranty Disclaimers next to the notice which
+states that this License applies to the Document.  These Warranty
+Disclaimers are considered to be included by reference in this
+License, but only as regards disclaiming warranties: any other
+implication that these Warranty Disclaimers may have is void and has
+no effect on the meaning of this License.
+
+2. VERBATIM COPYING
+~~~~~~~~~~~~~~~~~~~
+
+You may copy and distribute the Document in any medium, either
+commercially or noncommercially, provided that this License, the
+copyright notices, and the license notice saying this License applies
+to the Document are reproduced in all copies, and that you add no other
+conditions whatsoever to those of this License.  You may not use
+technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute.  However, you may accept
+compensation in exchange for copies.  If you distribute a large enough
+number of copies you must also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+3. COPYING IN QUANTITY
+~~~~~~~~~~~~~~~~~~~~~~
+
+If you publish printed copies (or copies in media that commonly have
+printed covers) of the Document, numbering more than 100, and the
+Document's license notice requires Cover Texts, you must enclose the
+copies in covers that carry, clearly and legibly, all these Cover
+Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+the back cover.  Both covers must also clearly and legibly identify
+you as the publisher of these copies.  The front cover must present
+the full title with all words of the title equally prominent and
+visible.  You may add other material on the covers in addition.
+Copying with changes limited to the covers, as long as they preserve
+the title of the Document and satisfy these conditions, can be treated
+as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute Opaque copies of the Document numbering
+more than 100, you must either include a machine-readable Transparent
+copy along with each Opaque copy, or state in or with each Opaque copy
+a computer-network location from which the general network-using
+public has access to download using public-standard network protocols
+a complete Transparent copy of the Document, free of added material.
+If you use the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity, to ensure
+that this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you distribute an
+Opaque copy (directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the authors of the
+Document well before redistributing any large number of copies, to give
+them a chance to provide you with an updated version of the Document.
+
+4. MODIFICATIONS
+~~~~~~~~~~~~~~~~
+
+You may copy and distribute a Modified Version of the Document under
+the conditions of sections 2 and 3 above, provided that you release
+the Modified Version under precisely this License, with the Modified
+Version filling the role of the Document, thus licensing distribution
+and modification of the Modified Version to whoever possesses a copy
+of it.  In addition, you must do these things in the Modified Version:
+
+A. Use in the Title Page (and on the covers, if any) a title distinct
+   from that of the Document, and from those of previous versions
+   (which should, if there were any, be listed in the History section
+   of the Document).  You may use the same title as a previous version
+   if the original publisher of that version gives permission.
+
+B. List on the Title Page, as authors, one or more persons or entities
+   responsible for authorship of the modifications in the Modified
+   Version, together with at least five of the principal authors of the
+   Document (all of its principal authors, if it has fewer than five),
+   unless they release you from this requirement.
+
+C. State on the Title page the name of the publisher of the
+   Modified Version, as the publisher.
+
+D. Preserve all the copyright notices of the Document.
+
+E. Add an appropriate copyright notice for your modifications
+   adjacent to the other copyright notices.
+
+F. Include, immediately after the copyright notices, a license notice
+   giving the public permission to use the Modified Version under the
+   terms of this License, in the form shown in the Addendum below.
+
+G. Preserve in that license notice the full lists of Invariant Sections
+   and required Cover Texts given in the Document's license notice.
+H. Include an unaltered copy of this License.
+
+I. Preserve the section Entitled "History", Preserve its Title, and add
+   to it an item stating at least the title, year, new authors, and
+   publisher of the Modified Version as given on the Title Page.  If
+   there is no section Entitled "History" in the Document, create one
+   stating the title, year, authors, and publisher of the Document as
+   given on its Title Page, then add an item describing the Modified
+   Version as stated in the previous sentence.
+
+J. Preserve the network location, if any, given in the Document for
+   public access to a Transparent copy of the Document, and likewise
+   the network locations given in the Document for previous versions
+   it was based on.  These may be placed in the "History" section.
+   You may omit a network location for a work that was published at
+   least four years before the Document itself, or if the original
+   publisher of the version it refers to gives permission.
+
+K. For any section Entitled "Acknowledgements" or "Dedications",
+   Preserve the Title of the section, and preserve in the section all
+   the substance and tone of each of the contributor acknowledgements
+   and/or dedications given therein.
+
+L. Preserve all the Invariant Sections of the Document,
+   unaltered in their text and in their titles.  Section numbers
+   or the equivalent are not considered part of the section titles.
+
+M. Delete any section Entitled "Endorsements".  Such a section
+   may not be included in the Modified Version.
+
+N. Do not retitle any existing section to be Entitled "Endorsements"
+   or to conflict in title with any Invariant Section.
+
+O. Preserve any Warranty Disclaimers.
+
+If the Modified Version includes new front-matter sections or
+appendices that qualify as Secondary Sections and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant.  To do this, add their titles to the
+list of Invariant Sections in the Modified Version's license notice.
+These titles must be distinct from any other section titles.
+
+You may add a section Entitled "Endorsements", provided it contains
+nothing but endorsements of your Modified Version by various
+parties---for example, statements of peer review or that the text has
+been approved by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover Text, and a
+passage of up to 25 words as a Back-Cover Text, to the end of the list
+of Cover Texts in the Modified Version.  Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or
+through arrangements made by) any one entity.  If the Document already
+includes a cover text for the same cover, previously added by you or
+by arrangement made by the same entity you are acting on behalf of,
+you may not add another; but you may replace the old one, on explicit
+permission from the previous publisher that added the old one.
+
+The author(s) and publisher(s) of the Document do not by this License
+give permission to use their names for publicity for or to assert or
+imply endorsement of any Modified Version.
+
+5. COMBINING DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~
+
+You may combine the Document with other documents released under this
+License, under the terms defined in section 4 above for modified
+versions, provided that you include in the combination all of the
+Invariant Sections of all of the original documents, unmodified, and
+list them all as Invariant Sections of your combined work in its
+license notice, and that you preserve all their Warranty Disclaimers.
+
+The combined work need only contain one copy of this License, and
+multiple identical Invariant Sections may be replaced with a single
+copy.  If there are multiple Invariant Sections with the same name but
+different contents, make the title of each such section unique by
+adding at the end of it, in parentheses, the name of the original
+author or publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list of
+Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections Entitled "History"
+in the various original documents, forming one section Entitled
+"History"; likewise combine any sections Entitled "Acknowledgements",
+and any sections Entitled "Dedications".  You must delete all sections
+Entitled "Endorsements".
+
+6. COLLECTIONS OF DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+You may make a collection consisting of the Document and other documents
+released under this License, and replace the individual copies of this
+License in the various documents with a single copy that is included in
+the collection, provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+7. AGGREGATION WITH INDEPENDENT WORKS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A compilation of the Document or its derivatives with other separate
+and independent documents or works, in or on a volume of a storage or
+distribution medium, is called an "aggregate" if the copyright
+resulting from the compilation is not used to limit the legal rights
+of the compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License does not
+apply to the other works in the aggregate which are not themselves
+derivative works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to these
+copies of the Document, then if the Document is less than one half of
+the entire aggregate, the Document's Cover Texts may be placed on
+covers that bracket the Document within the aggregate, or the
+electronic equivalent of covers if the Document is in electronic form.
+Otherwise they must appear on printed covers that bracket the whole
+aggregate.
+
+8. TRANSLATION
+~~~~~~~~~~~~~~
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of section 4.
+Replacing Invariant Sections with translations requires special
+permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections.  You may include a
+translation of this License, and all the license notices in the
+Document, and any Warranty Disclaimers, provided that you also include
+the original English version of this License and the original versions
+of those notices and disclaimers.  In case of a disagreement between
+the translation and the original version of this License or a notice
+or disclaimer, the original version will prevail.
+
+If a section in the Document is Entitled "Acknowledgements",
+"Dedications", or "History", the requirement (section 4) to Preserve
+its Title (section 1) will typically require changing the actual
+title.
+
+9. TERMINATION
+~~~~~~~~~~~~~~
+
+You may not copy, modify, sublicense, or distribute the Document
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense, or distribute it is void, and
+will automatically terminate your rights under this License.
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, receipt of a copy of some or all of the same material does
+not give you any rights to use it.
+
+10. FUTURE REVISIONS OF THIS LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The Free Software Foundation may publish new, revised versions
+of the GNU Free Documentation License from time to time.  Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.  See
+https://www.gnu.org/copyleft/.
+
+Each version of the License is given a distinguishing version number.
+If the Document specifies that a particular numbered version of this
+License "or any later version" applies to it, you have the option of
+following the terms and conditions either of that specified version or
+of any later version that has been published (not as a draft) by the
+Free Software Foundation.  If the Document does not specify a version
+number of this License, you may choose any version ever published (not
+as a draft) by the Free Software Foundation.  If the Document
+specifies that a proxy can decide which future versions of this
+License can be used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version for the
+Document.
+
+11. RELICENSING
+~~~~~~~~~~~~~~~
+
+"Massive Multiauthor Collaboration Site" (or "MMC Site") means any
+World Wide Web server that publishes copyrightable works and also
+provides prominent facilities for anybody to edit those works.  A
+public wiki that anybody can edit is an example of such a server.  A
+"Massive Multiauthor Collaboration" (or "MMC") contained in the
+site means any set of copyrightable works thus published on the MMC
+site.
+
+"CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
+license published by Creative Commons Corporation, a not-for-profit
+corporation with a principal place of business in San Francisco,
+California, as well as future copyleft versions of that license
+published by that same organization.
+
+"Incorporate" means to publish or republish a Document, in whole or
+in part, as part of another Document.
+
+An MMC is "eligible for relicensing" if it is licensed under this
+License, and if all works that were first published under this License
+somewhere other than this MMC, and subsequently incorporated in whole
+or in part into the MMC, (1) had no cover texts or invariant sections,
+and (2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained in the site
+under CC-BY-SA on the same site at any time before August 1, 2009,
+provided the MMC is eligible for relicensing.
+
+ADDENDUM: How to use this License for your documents
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and
+license notices just after the title page:
+
+    Copyright © YEAR  YOUR NAME.
+    Permission is granted to copy, distribute and/or modify this document
+    under the terms of the GNU Free Documentation License, Version 1.3
+    or any later version published by the Free Software Foundation;
+    with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+    A copy of the license is included in the section entitled "GNU
+    Free Documentation License".
+
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the "with ... Texts." line with this:
+
+    with the Invariant Sections being LIST THEIR TITLES, with the
+    Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
+
+If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of
+free software license, such as the GNU General Public License,
+to permit their use in free software.
\ No newline at end of file
diff --git a/doc/gpl-3.0.rst b/doc/gpl-3.0.rst
new file mode 100644
index 00000000000..07ffd72b375
--- /dev/null
+++ b/doc/gpl-3.0.rst
@@ -0,0 +1,707 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU GENERAL PUBLIC LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Version 3, 29 June 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+########
+
+The GNU General Public License is a free, copyleft license for software
+and other kinds of works.
+
+The licenses for most software and other practical works are designed to
+take away your freedom to share and change the works. By contrast, the
+GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users. We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
+your programs, too.
+
+When we speak of free software, we are referring to freedom, not price.
+Our General Public Licenses are designed to make sure that you have the
+freedom to distribute copies of free software (and charge for them if
+you wish), that you receive source code or can get it if you want it,
+that you can change the software or use pieces of it in new free
+programs, and that you know you can do these things.
+
+To protect your rights, we need to prevent others from denying you these
+rights or asking you to surrender the rights. Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+For example, if you distribute copies of such a program, whether gratis
+or for a fee, you must pass on to the recipients the same freedoms that
+you received. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+Developers that use the GNU GPL protect your rights with two steps: (1)
+assert copyright on the software, and (2) offer you this License giving
+you legal permission to copy, distribute and/or modify it.
+
+For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software. For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so. This is fundamentally incompatible with the aim of protecting
+users' freedom to change the software. The systematic pattern of such
+abuse occurs in the area of products for individuals to use, which is
+precisely where it is most unacceptable. Therefore, we have designed
+this version of the GPL to prohibit the practice for those products. If
+such problems arise substantially in other domains, we stand ready to
+extend this provision to those domains in future versions of the GPL, as
+needed to protect the freedom of users.
+
+Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary. To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+TERMS AND CONDITIONS
+####################
+
+0. Definitions.
+^^^^^^^^^^^^^^^
+
+"This License" refers to version 3 of the GNU General Public License.
+
+"Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+"The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
+"recipients" may be individuals or organizations.
+
+To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy. The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+A "covered work" means either the unmodified Program or a work based on
+the Program.
+
+To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+An interactive user interface displays "Appropriate Legal Notices" to
+the extent that it includes a convenient and prominently visible feature
+that (1) displays an appropriate copyright notice, and (2) tells the
+user that there is no warranty for the work (except to the extent that
+warranties are provided), that licensees may convey the work under this
+License, and how to view a copy of this License. If the interface
+presents a list of user commands or options, such as a menu, a prominent
+item in the list meets this criterion.
+
+1. Source Code.
+^^^^^^^^^^^^^^^
+
+The "source code" for a work means the preferred form of the work for
+making modifications to it. "Object code" means any non-source form of a
+work.
+
+A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that is
+widely used among developers working in that language.
+
+The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
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+Component", in this context, means a major essential component (kernel,
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+or an object code interpreter used to run it.
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+The "Corresponding Source" for a work in object code form means all the
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+not part of the work. For example, Corresponding Source includes
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+and the source code for shared libraries and dynamically linked
+subprograms that the work is specifically designed to require, such as
+by intimate data communication or control flow between those subprograms
+and other parts of the work.
+
+The Corresponding Source need not include anything that users can
+regenerate automatically from other parts of the Corresponding Source.
+
+The Corresponding Source for a work in source code form is that same
+work.
+
+2. Basic Permissions.
+^^^^^^^^^^^^^^^^^^^^^
+
+All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met. This License explicitly affirms your unlimited
+permission to run the unmodified Program. The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work. This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+You may make, run and propagate covered works that you do not convey,
+without conditions so long as your license otherwise remains in force.
+You may convey covered works to others for the sole purpose of having
+them make modifications exclusively for you, or provide you with
+facilities for running those works, provided that you comply with the
+terms of this License in conveying all material for which you do not
+control copyright. Those thus making or running the covered works for
+you must do so exclusively on your behalf, under your direction and
+control, on terms that prohibit them from making any copies of your
+copyrighted material outside their relationship with you.
+
+Conveying under any other circumstances is permitted solely under the
+conditions stated below. Sublicensing is not allowed; section 10 makes
+it unnecessary.
+
+3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article 11
+of the WIPO copyright treaty adopted on 20 December 1996, or similar
+laws prohibiting or restricting circumvention of such measures.
+
+When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to the
+covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+4. Conveying Verbatim Copies.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice; keep
+intact all notices stating that this License and any non-permissive
+terms added in accord with section 7 apply to the code; keep intact all
+notices of the absence of any warranty; and give all recipients a copy
+of this License along with the Program.
+
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+12. No Surrender of Others' Freedom.
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+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+14. Revised Versions of this License.
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+^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+16. Limitation of Liability.
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+
+17. Interpretation of Sections 15 and 16.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If the disclaimer of warranty and limitation of liability provided above
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+warranty or assumption of liability accompanies a copy of the Program in
+return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+#############################################
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+::
+
+        <one line to give the program's name and a brief idea of what it does.>
+        Copyright (C) <year>  <name of author>
+
+        This program is free software: you can redistribute it and/or modify
+        it under the terms of the GNU General Public License as published by
+        the Free Software Foundation, either version 3 of the License, or
+        (at your option) any later version.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+        GNU General Public License for more details.
+
+        You should have received a copy of the GNU General Public License
+        along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice
+like this when it starts in an interactive mode:
+
+::
+
+        <program>  Copyright (C) <year>  <name of author>
+        This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+        This is free software, and you are welcome to redistribute it
+        under certain conditions; type `show c' for details.
+
+The hypothetical commands \`show w' and \`show c' should show the
+appropriate parts of the General Public License. Of course, your
+program's commands might be different; for a GUI interface, you would
+use an "about box".
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow the
+GNU GPL, see https://www.gnu.org/licenses/.
+
+The GNU General Public License does not permit incorporating your
+program into proprietary programs. If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library. If this is what you want to do, use the
+GNU Lesser General Public License instead of this License. But first,
+please read https://www.gnu.org/licenses/why-not-lgpl.html.
\ No newline at end of file
diff --git a/doc/indices-and-tables.rst b/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..92bf73bcb0a
--- /dev/null
+++ b/doc/indices-and-tables.rst
@@ -0,0 +1,13 @@
+.. only:: html
+
+  Indexes and tables
+  ==================
+
+  :ref:`genindex`
+
+  .. only:: development
+
+    TODO
+    ----
+
+    .. todolist::
\ No newline at end of file
diff --git a/doc/lgpl-2.1.rst b/doc/lgpl-2.1.rst
new file mode 100644
index 00000000000..845de30d8d4
--- /dev/null
+++ b/doc/lgpl-2.1.rst
@@ -0,0 +1,514 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU LESSER GENERAL PUBLIC LICENSE
+---------------------------------
+
+.. index:: LGPL, Lesser General Public License
+
+Version 2.1, February 1999
+
+Copyright (C) 1991-2022 Free Software Foundation, Inc.
+51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+as the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+
+Preamble
+^^^^^^^^
+
+The licenses for most software are designed to take away your
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+That's all there is to it!
\ No newline at end of file
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diff --git a/doc/md.rst b/doc/md.rst
new file mode 100644
index 00000000000..55e0711113e
--- /dev/null
+++ b/doc/md.rst
@@ -0,0 +1,3142 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: simple constraints
+
+.. _simple-constraints:
+
+Simple Constraints
+^^^^^^^^^^^^^^^^^^
+
+The simplest kind of constraint is a string full of letters, each of
+which describes one kind of operand that is permitted.  Here are
+the letters that are allowed:
+
+whitespace
+  Whitespace characters are ignored and can be inserted at any position
+  except the first.  This enables each alternative for different operands to
+  be visually aligned in the machine description even if they have different
+  number of constraints and modifiers.
+
+  .. index:: m in constraint, memory references in constraints
+
+m
+  A memory operand is allowed, with any kind of address that the machine
+  supports in general.
+  Note that the letter used for the general memory constraint can be
+  re-defined by a back end using the ``TARGET_MEM_CONSTRAINT`` macro.
+
+  .. index:: offsettable address, o in constraint
+
+o
+  A memory operand is allowed, but only if the address is
+  :dfn:`offsettable`.  This means that adding a small integer (actually,
+  the width in bytes of the operand, as determined by its machine mode)
+  may be added to the address and the result is also a valid memory
+  address.
+
+  .. index:: autoincrement/decrement addressing
+
+  For example, an address which is constant is offsettable; so is an
+  address that is the sum of a register and a constant (as long as a
+  slightly larger constant is also within the range of address-offsets
+  supported by the machine); but an autoincrement or autodecrement
+  address is not offsettable.  More complicated indirect/indexed
+  addresses may or may not be offsettable depending on the other
+  addressing modes that the machine supports.
+
+  Note that in an output operand which can be matched by another
+  operand, the constraint letter :samp:`o` is valid only when accompanied
+  by both :samp:`<` (if the target machine has predecrement addressing)
+  and :samp:`>` (if the target machine has preincrement addressing).
+
+  .. index:: V in constraint
+
+V
+  A memory operand that is not offsettable.  In other words, anything that
+  would fit the :samp:`m` constraint but not the :samp:`o` constraint.
+
+  .. index:: < in constraint
+
+<
+  A memory operand with autodecrement addressing (either predecrement or
+  postdecrement) is allowed.  In inline ``asm`` this constraint is only
+  allowed if the operand is used exactly once in an instruction that can
+  handle the side effects.  Not using an operand with :samp:`<` in constraint
+  string in the inline ``asm`` pattern at all or using it in multiple
+  instructions isn't valid, because the side effects wouldn't be performed
+  or would be performed more than once.  Furthermore, on some targets
+  the operand with :samp:`<` in constraint string must be accompanied by
+  special instruction suffixes like ``%U0`` instruction suffix on PowerPC
+  or ``%P0`` on IA-64.
+
+  .. index:: > in constraint
+
+>
+  A memory operand with autoincrement addressing (either preincrement or
+  postincrement) is allowed.  In inline ``asm`` the same restrictions
+  as for :samp:`<` apply.
+
+  .. index:: r in constraint, registers in constraints
+
+r
+  A register operand is allowed provided that it is in a general
+  register.
+
+  .. index:: constants in constraints, i in constraint
+
+i
+  An immediate integer operand (one with constant value) is allowed.
+  This includes symbolic constants whose values will be known only at
+  assembly time or later.
+
+  .. index:: n in constraint
+
+n
+  An immediate integer operand with a known numeric value is allowed.
+  Many systems cannot support assembly-time constants for operands less
+  than a word wide.  Constraints for these operands should use :samp:`n`
+  rather than :samp:`i`.
+
+  .. index:: I in constraint
+
+:samp:`{I}, {J}, {K}, ... {P}`
+  Other letters in the range :samp:`I` through :samp:`P` may be defined in
+  a machine-dependent fashion to permit immediate integer operands with
+  explicit integer values in specified ranges.  For example, on the
+  68000, :samp:`I` is defined to stand for the range of values 1 to 8.
+  This is the range permitted as a shift count in the shift
+  instructions.
+
+  .. index:: E in constraint
+
+E
+  An immediate floating operand (expression code ``const_double``) is
+  allowed, but only if the target floating point format is the same as
+  that of the host machine (on which the compiler is running).
+
+  .. index:: F in constraint
+
+F
+  An immediate floating operand (expression code ``const_double`` or
+  ``const_vector``) is allowed.
+
+  .. index:: G in constraint, H in constraint
+
+:samp:`{G}, {H}`
+  :samp:`G` and :samp:`H` may be defined in a machine-dependent fashion to
+  permit immediate floating operands in particular ranges of values.
+
+  .. index:: s in constraint
+
+s
+  An immediate integer operand whose value is not an explicit integer is
+  allowed.
+
+  This might appear strange; if an insn allows a constant operand with a
+  value not known at compile time, it certainly must allow any known
+  value.  So why use :samp:`s` instead of :samp:`i`?  Sometimes it allows
+  better code to be generated.
+
+  For example, on the 68000 in a fullword instruction it is possible to
+  use an immediate operand; but if the immediate value is between -128
+  and 127, better code results from loading the value into a register and
+  using the register.  This is because the load into the register can be
+  done with a :samp:`moveq` instruction.  We arrange for this to happen
+  by defining the letter :samp:`K` to mean 'any integer outside the
+  range -128 to 127', and then specifying :samp:`Ks` in the operand
+  constraints.
+
+  .. index:: g in constraint
+
+g
+  Any register, memory or immediate integer operand is allowed, except for
+  registers that are not general registers.
+
+  .. index:: X in constraint
+
+X
+
+  .. only:: gccint
+
+    Any operand whatsoever is allowed, even if it does not satisfy
+    ``general_operand``.  This is normally used in the constraint of
+    a ``match_scratch`` when certain alternatives will not actually
+    require a scratch register.
+
+  .. only:: not gccint
+
+    Any operand whatsoever is allowed.
+
+  .. index:: 0 in constraint, digits in constraint
+
+:samp:`{0}, {1}, {2}, ... {9}`
+  An operand that matches the specified operand number is allowed.  If a
+  digit is used together with letters within the same alternative, the
+  digit should come last.
+
+  This number is allowed to be more than a single digit.  If multiple
+  digits are encountered consecutively, they are interpreted as a single
+  decimal integer.  There is scant chance for ambiguity, since to-date
+  it has never been desirable that :samp:`10` be interpreted as matching
+  either operand 1 *or* operand 0.  Should this be desired, one
+  can use multiple alternatives instead.
+
+  .. index:: matching constraint, constraint, matching
+
+  This is called a :dfn:`matching constraint` and what it really means is
+  that the assembler has only a single operand that fills two roles
+
+  .. only:: gccint
+
+    considered separate in the RTL insn.  For example, an add insn has two
+    input operands and one output operand in the RTL, but on most CISC
+
+  .. only:: not gccint
+
+    which ``asm`` distinguishes.  For example, an add instruction uses
+    two input operands and an output operand, but on most CISC
+
+  machines an add instruction really has only two operands, one of them an
+  input-output operand:
+
+  .. code-block::
+
+    addl #35,r12
+
+  Matching constraints are used in these circumstances.
+  More precisely, the two operands that match must include one input-only
+  operand and one output-only operand.  Moreover, the digit must be a
+  smaller number than the number of the operand that uses it in the
+  constraint.
+
+  .. only:: gccint
+
+    For operands to match in a particular case usually means that they
+    are identical-looking RTL expressions.  But in a few special cases
+    specific kinds of dissimilarity are allowed.  For example, ``*x``
+    as an input operand will match ``*x++`` as an output operand.
+    For proper results in such cases, the output template should always
+    use the output-operand's number when printing the operand.
+
+  .. index:: load address instruction, push address instruction, address constraints, p in constraint
+
+p
+  An operand that is a valid memory address is allowed.  This is
+  for 'load address' and 'push address' instructions.
+
+  .. index:: address_operand
+
+  :samp:`p` in the constraint must be accompanied by ``address_operand``
+  as the predicate in the ``match_operand``.  This predicate interprets
+  the mode specified in the ``match_operand`` as the mode of the memory
+  reference for which the address would be valid.
+
+  .. index:: other register constraints, extensible constraints
+
+other-letters
+  Other letters can be defined in machine-dependent fashion to stand for
+  particular classes of registers or other arbitrary operand types.
+  :samp:`d`, :samp:`a` and :samp:`f` are defined on the 68000/68020 to stand
+  for data, address and floating point registers.
+
+.. only:: gccint
+
+  In order to have valid assembler code, each operand must satisfy
+  its constraint.  But a failure to do so does not prevent the pattern
+  from applying to an insn.  Instead, it directs the compiler to modify
+  the code so that the constraint will be satisfied.  Usually this is
+  done by copying an operand into a register.
+
+  Contrast, therefore, the two instruction patterns that follow:
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_dup 0)
+                     (match_operand:SI 1 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has two operands, one of which must appear in two places, and
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_operand:SI 1 "general_operand" "0")
+                     (match_operand:SI 2 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has three operands, two of which are required by a constraint to be
+  identical.  If we are considering an insn of the form
+
+  .. code-block:: c++
+
+    (insn n prev next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 6) (reg:SI 109)))
+      ...)
+
+  the first pattern would not apply at all, because this insn does not
+  contain two identical subexpressions in the right place.  The pattern would
+  say, 'That does not look like an add instruction; try other patterns'.
+  The second pattern would say, 'Yes, that's an add instruction, but there
+  is something wrong with it'.  It would direct the reload pass of the
+  compiler to generate additional insns to make the constraint true.  The
+  results might look like this:
+
+  .. code-block:: c++
+
+    (insn n2 prev n
+      (set (reg:SI 3) (reg:SI 6))
+      ...)
+
+    (insn n n2 next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 3) (reg:SI 109)))
+      ...)
+
+  It is up to you to make sure that each operand, in each pattern, has
+  constraints that can handle any RTL expression that could be present for
+  that operand.  (When multiple alternatives are in use, each pattern must,
+  for each possible combination of operand expressions, have at least one
+  alternative which can handle that combination of operands.)  The
+  constraints don't need to *allow* any possible operand---when this is
+  the case, they do not constrain---but they must at least point the way to
+  reloading any possible operand so that it will fit.
+
+  * If the constraint accepts whatever operands the predicate permits,
+    there is no problem: reloading is never necessary for this operand.
+
+    For example, an operand whose constraints permit everything except
+    registers is safe provided its predicate rejects registers.
+
+    An operand whose predicate accepts only constant values is safe
+    provided its constraints include the letter :samp:`i`.  If any possible
+    constant value is accepted, then nothing less than :samp:`i` will do;
+    if the predicate is more selective, then the constraints may also be
+    more selective.
+
+  * Any operand expression can be reloaded by copying it into a register.
+    So if an operand's constraints allow some kind of register, it is
+    certain to be safe.  It need not permit all classes of registers; the
+    compiler knows how to copy a register into another register of the
+    proper class in order to make an instruction valid.
+
+    .. index:: nonoffsettable memory reference, memory reference, nonoffsettable
+
+  * A nonoffsettable memory reference can be reloaded by copying the
+    address into a register.  So if the constraint uses the letter
+    :samp:`o`, all memory references are taken care of.
+
+  * A constant operand can be reloaded by allocating space in memory to
+    hold it as preinitialized data.  Then the memory reference can be used
+    in place of the constant.  So if the constraint uses the letters
+    :samp:`o` or :samp:`m`, constant operands are not a problem.
+
+  * If the constraint permits a constant and a pseudo register used in an insn
+    was not allocated to a hard register and is equivalent to a constant,
+    the register will be replaced with the constant.  If the predicate does
+    not permit a constant and the insn is re-recognized for some reason, the
+    compiler will crash.  Thus the predicate must always recognize any
+    objects allowed by the constraint.
+
+  If the operand's predicate can recognize registers, but the constraint does
+  not permit them, it can make the compiler crash.  When this operand happens
+  to be a register, the reload pass will be stymied, because it does not know
+  how to copy a register temporarily into memory.
+
+  If the predicate accepts a unary operator, the constraint applies to the
+  operand.  For example, the MIPS processor at ISA level 3 supports an
+  instruction which adds two registers in ``SImode`` to produce a
+  ``DImode`` result, but only if the registers are correctly sign
+  extended.  This predicate for the input operands accepts a
+  ``sign_extend`` of an ``SImode`` register.  Write the constraint
+  to indicate the type of register that is required for the operand of the
+  ``sign_extend``.
+
+.. only:: not gccint
+
+  So the first alternative for the 68000's logical-or could be written as
+  ``"+m" (output) : "ir" (input)``.  The second could be ``"+r"
+  (output): "irm" (input)``.  However, the fact that two memory locations
+  cannot be used in a single instruction prevents simply using ``"+rm"
+  (output) : "irm" (input)``.  Using multi-alternatives, this might be
+  written as ``"+m,r" (output) : "ir,irm" (input)``.  This describes
+  all the available alternatives to the compiler, allowing it to choose
+  the most efficient one for the current conditions.
+
+  There is no way within the template to determine which alternative was
+  chosen.  However you may be able to wrap your ``asm`` statements with
+  builtins such as ``__builtin_constant_p`` to achieve the desired results.
+
+.. index:: multiple alternative constraints
+
+.. _multi-alternative:
+
+Multiple Alternative Constraints
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Sometimes a single instruction has multiple alternative sets of possible
+operands.  For example, on the 68000, a logical-or instruction can combine
+register or an immediate value into memory, or it can combine any kind of
+operand into a register; but it cannot combine one memory location into
+another.
+
+These constraints are represented as multiple alternatives.  An alternative
+can be described by a series of letters for each operand.  The overall
+constraint for an operand is made from the letters for this operand
+from the first alternative, a comma, the letters for this operand from
+the second alternative, a comma, and so on until the last alternative.
+All operands for a single instruction must have the same number of
+alternatives.
+
+.. only:: gccint
+
+  Here is how it is done for fullword logical-or on the 68000:
+
+  .. code-block:: c++
+
+    (define_insn "iorsi3"
+      [(set (match_operand:SI 0 "general_operand" "=m,d")
+            (ior:SI (match_operand:SI 1 "general_operand" "%0,0")
+                    (match_operand:SI 2 "general_operand" "dKs,dmKs")))]
+      ...)
+
+  The first alternative has :samp:`m` (memory) for operand 0, :samp:`0` for
+  operand 1 (meaning it must match operand 0), and :samp:`dKs` for operand
+  2.  The second alternative has :samp:`d` (data register) for operand 0,
+  :samp:`0` for operand 1, and :samp:`dmKs` for operand 2.  The :samp:`=` and
+  :samp:`%` in the constraints apply to all the alternatives; their
+  meaning is explained in the next section (see :ref:`class-preferences`).
+
+  If all the operands fit any one alternative, the instruction is valid.
+  Otherwise, for each alternative, the compiler counts how many instructions
+  must be added to copy the operands so that that alternative applies.
+  The alternative requiring the least copying is chosen.  If two alternatives
+  need the same amount of copying, the one that comes first is chosen.
+  These choices can be altered with the :samp:`?` and :samp:`!` characters:
+
+  .. index:: ? in constraint, question mark
+
+  ``?``
+    Disparage slightly the alternative that the :samp:`?` appears in,
+    as a choice when no alternative applies exactly.  The compiler regards
+    this alternative as one unit more costly for each :samp:`?` that appears
+    in it.
+
+    .. index:: ! in constraint, exclamation point
+
+  ``!``
+    Disparage severely the alternative that the :samp:`!` appears in.
+    This alternative can still be used if it fits without reloading,
+    but if reloading is needed, some other alternative will be used.
+
+    .. index:: ^ in constraint, caret
+
+  ``^``
+    This constraint is analogous to :samp:`?` but it disparages slightly
+    the alternative only if the operand with the :samp:`^` needs a reload.
+
+    .. index:: $ in constraint, dollar sign
+
+  ``$``
+    This constraint is analogous to :samp:`!` but it disparages severely
+    the alternative only if the operand with the :samp:`$` needs a reload.
+
+  When an insn pattern has multiple alternatives in its constraints, often
+  the appearance of the assembler code is determined mostly by which
+  alternative was matched.  When this is so, the C code for writing the
+  assembler code can use the variable ``which_alternative``, which is
+  the ordinal number of the alternative that was actually satisfied (0 for
+  the first, 1 for the second alternative, etc.).  See :ref:`output-statement`.
+
+.. _class-preferences:
+
+Register Class Preferences
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. only:: gccint
+
+  .. index:: class preference constraints, register class preference constraints, voting between constraint alternatives
+
+  The operand constraints have another function: they enable the compiler
+  to decide which kind of hardware register a pseudo register is best
+  allocated to.  The compiler examines the constraints that apply to the
+  insns that use the pseudo register, looking for the machine-dependent
+  letters such as :samp:`d` and :samp:`a` that specify classes of registers.
+  The pseudo register is put in whichever class gets the most 'votes'.
+  The constraint letters :samp:`g` and :samp:`r` also vote: they vote in
+  favor of a general register.  The machine description says which registers
+  are considered general.
+
+  Of course, on some machines all registers are equivalent, and no register
+  classes are defined.  Then none of this complexity is relevant.
+
+.. index:: modifiers in constraints, constraint modifier characters
+
+.. _modifiers:
+
+Constraint Modifier Characters
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. prevent bad page break with this line
+
+Here are constraint modifier characters.
+
+.. index:: = in constraint
+
+:samp:`=`
+  Means that this operand is written to by this instruction:
+  the previous value is discarded and replaced by new data.
+
+  .. index:: + in constraint
+
+:samp:`+`
+  Means that this operand is both read and written by the instruction.
+
+  When the compiler fixes up the operands to satisfy the constraints,
+  it needs to know which operands are read by the instruction and
+  which are written by it.  :samp:`=` identifies an operand which is only
+  written; :samp:`+` identifies an operand that is both read and written; all
+  other operands are assumed to only be read.
+
+  If you specify :samp:`=` or :samp:`+` in a constraint, you put it in the
+  first character of the constraint string.
+
+  .. index:: & in constraint, earlyclobber operand
+
+:samp:`&`
+  Means (in a particular alternative) that this operand is an
+  :dfn:`earlyclobber` operand, which is written before the instruction is
+  finished using the input operands.  Therefore, this operand may not lie
+  in a register that is read by the instruction or as part of any memory
+  address.
+
+  :samp:`&` applies only to the alternative in which it is written.  In
+  constraints with multiple alternatives, sometimes one alternative
+  requires :samp:`&` while others do not.  See, for example, the
+  :samp:`movdf` insn of the 68000.
+
+  An operand which is read by the instruction can be tied to an earlyclobber
+  operand if its only use as an input occurs before the early result is
+  written.  Adding alternatives of this form often allows GCC to produce
+  better code when only some of the read operands can be affected by the
+  earlyclobber. See, for example, the :samp:`mulsi3` insn of the ARM.
+
+  Furthermore, if the :dfn:`earlyclobber` operand is also a read/write
+  operand, then that operand is written only after it's used.
+
+  :samp:`&` does not obviate the need to write :samp:`=` or :samp:`+`.  As
+  :dfn:`earlyclobber` operands are always written, a read-only
+  :dfn:`earlyclobber` operand is ill-formed and will be rejected by the
+  compiler.
+
+  .. index:: % in constraint
+
+:samp:`%`
+  Declares the instruction to be commutative for this operand and the
+  following operand.  This means that the compiler may interchange the
+  two operands if that is the cheapest way to make all operands fit the
+  constraints.  :samp:`%` applies to all alternatives and must appear as
+  the first character in the constraint.  Only read-only operands can use
+  :samp:`%`.
+
+  .. only:: gccint
+
+    This is often used in patterns for addition instructions
+    that really have only two operands: the result must go in one of the
+    arguments.  Here for example, is how the 68000 halfword-add
+    instruction is defined:
+
+    .. code-block:: c++
+
+      (define_insn "addhi3"
+        [(set (match_operand:HI 0 "general_operand" "=m,r")
+           (plus:HI (match_operand:HI 1 "general_operand" "%0,0")
+                    (match_operand:HI 2 "general_operand" "di,g")))]
+        ...)
+
+  GCC can only handle one commutative pair in an asm; if you use more,
+  the compiler may fail.  Note that you need not use the modifier if
+  the two alternatives are strictly identical; this would only waste
+  time in the reload pass.
+
+  .. only:: gccint
+
+    The modifier is not operational after
+    register allocation, so the result of ``define_peephole2``
+    and ``define_split`` s performed after reload cannot rely on
+    :samp:`%` to make the intended insn match.
+
+    .. index:: # in constraint
+
+  :samp:`#`
+    Says that all following characters, up to the next comma, are to be
+    ignored as a constraint.  They are significant only for choosing
+    register preferences.
+
+    .. index:: * in constraint
+
+  :samp:`*`
+    Says that the following character should be ignored when choosing
+    register preferences.  :samp:`*` has no effect on the meaning of the
+    constraint as a constraint, and no effect on reloading.  For LRA
+    :samp:`*` additionally disparages slightly the alternative if the
+    following character matches the operand.
+
+    Here is an example: the 68000 has an instruction to sign-extend a
+    halfword in a data register, and can also sign-extend a value by
+    copying it into an address register.  While either kind of register is
+    acceptable, the constraints on an address-register destination are
+    less strict, so it is best if register allocation makes an address
+    register its goal.  Therefore, :samp:`*` is used so that the :samp:`d`
+    constraint letter (for data register) is ignored when computing
+    register preferences.
+
+    .. code-block:: c++
+
+      (define_insn "extendhisi2"
+        [(set (match_operand:SI 0 "general_operand" "=*d,a")
+              (sign_extend:SI
+               (match_operand:HI 1 "general_operand" "0,g")))]
+        ...)
+
+.. index:: machine specific constraints, constraints, machine specific
+
+.. _machine-constraints:
+
+Constraints for Particular Machines
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Whenever possible, you should use the general-purpose constraint letters
+in ``asm`` arguments, since they will convey meaning more readily to
+people reading your code.  Failing that, use the constraint letters
+that usually have very similar meanings across architectures.  The most
+commonly used constraints are :samp:`m` and :samp:`r` (for memory and
+general-purpose registers respectively; see :ref:`simple-constraints`), and
+:samp:`I`, usually the letter indicating the most common
+immediate-constant format.
+
+Each architecture defines additional constraints.  These constraints
+are used by the compiler itself for instruction generation, as well as
+for ``asm`` statements; therefore, some of the constraints are not
+particularly useful for ``asm``.  Here is a summary of some of the
+machine-dependent constraints available on some particular machines;
+it includes both constraints that are useful for ``asm`` and
+constraints that aren't.  The compiler source file mentioned in the
+table heading for each architecture is the definitive reference for
+the meanings of that architecture's constraints.
+
+.. Please keep this table alphabetized by target!
+
+AArch64 family---:samp:`{config/aarch64/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``k``
+  The stack pointer register (``SP``)
+
+``w``
+  Floating point register, Advanced SIMD vector register or SVE vector register
+
+``x``
+  Like ``w``, but restricted to registers 0 to 15 inclusive.
+
+``y``
+  Like ``w``, but restricted to registers 0 to 7 inclusive.
+
+``Upl``
+  One of the low eight SVE predicate registers (``P0`` to ``P7``)
+
+``Upa``
+  Any of the SVE predicate registers (``P0`` to ``P15``)
+
+``I``
+  Integer constant that is valid as an immediate operand in an ``ADD``
+  instruction
+
+``J``
+  Integer constant that is valid as an immediate operand in a ``SUB``
+  instruction (once negated)
+
+``K``
+  Integer constant that can be used with a 32-bit logical instruction
+
+``L``
+  Integer constant that can be used with a 64-bit logical instruction
+
+``M``
+  Integer constant that is valid as an immediate operand in a 32-bit ``MOV``
+  pseudo instruction. The ``MOV`` may be assembled to one of several different
+  machine instructions depending on the value
+
+``N``
+  Integer constant that is valid as an immediate operand in a 64-bit ``MOV``
+  pseudo instruction
+
+``S``
+  An absolute symbolic address or a label reference
+
+``Y``
+  Floating point constant zero
+
+``Z``
+  Integer constant zero
+
+``Ush``
+  The high part (bits 12 and upwards) of the pc-relative address of a symbol
+  within 4GB of the instruction
+
+``Q``
+  A memory address which uses a single base register with no offset
+
+``Ump``
+  A memory address suitable for a load/store pair instruction in SI, DI, SF and
+  DF modes
+
+AMD GCN ---:samp:`{config/gcn/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Immediate integer in the range -16 to 64
+
+``J``
+  Immediate 16-bit signed integer
+
+``Kf``
+  Immediate constant -1
+
+``L``
+  Immediate 15-bit unsigned integer
+
+``A``
+  Immediate constant that can be inlined in an instruction encoding: integer
+  -16..64, or float 0.0, +/-0.5, +/-1.0, +/-2.0,
+  +/-4.0, 1.0/(2.0\*PI)
+
+``B``
+  Immediate 32-bit signed integer that can be attached to an instruction encoding
+
+``C``
+  Immediate 32-bit integer in range -16..4294967295 (i.e. 32-bit unsigned
+  integer or :samp:`A` constraint)
+
+``DA``
+  Immediate 64-bit constant that can be split into two :samp:`A` constants
+
+``DB``
+  Immediate 64-bit constant that can be split into two :samp:`B` constants
+
+``U``
+  Any ``unspec``
+
+``Y``
+  Any ``symbol_ref`` or ``label_ref``
+
+``v``
+  VGPR register
+
+``Sg``
+  SGPR register
+
+``SD``
+  SGPR registers valid for instruction destinations, including VCC, M0 and EXEC
+
+``SS``
+  SGPR registers valid for instruction sources, including VCC, M0, EXEC and SCC
+
+``Sm``
+  SGPR registers valid as a source for scalar memory instructions (excludes M0
+  and EXEC)
+
+``Sv``
+  SGPR registers valid as a source or destination for vector instructions
+  (excludes EXEC)
+
+``ca``
+  All condition registers: SCC, VCCZ, EXECZ
+
+``cs``
+  Scalar condition register: SCC
+
+``cV``
+  Vector condition register: VCC, VCC_LO, VCC_HI
+
+``e``
+  EXEC register (EXEC_LO and EXEC_HI)
+
+``RB``
+  Memory operand with address space suitable for ``buffer_*`` instructions
+
+``RF``
+  Memory operand with address space suitable for ``flat_*`` instructions
+
+``RS``
+  Memory operand with address space suitable for ``s_*`` instructions
+
+``RL``
+  Memory operand with address space suitable for ``ds_*`` LDS instructions
+
+``RG``
+  Memory operand with address space suitable for ``ds_*`` GDS instructions
+
+``RD``
+  Memory operand with address space suitable for any ``ds_*`` instructions
+
+``RM``
+  Memory operand with address space suitable for ``global_*`` instructions
+
+ARC ---:samp:`{config/arc/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``q``
+  Registers usable in ARCompact 16-bit instructions: ``r0`` - ``r3``,
+  ``r12`` - ``r15``.  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``e``
+  Registers usable as base-regs of memory addresses in ARCompact 16-bit memory
+  instructions: ``r0`` - ``r3``, ``r12`` - ``r15``, ``sp``.
+  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``D``
+  ARC FPX (dpfp) 64-bit registers. ``D0``, ``D1``.
+
+``I``
+  A signed 12-bit integer constant.
+
+``Cal``
+  constant for arithmetic/logical operations.  This might be any constant
+  that can be put into a long immediate by the assmbler or linker without
+  involving a PIC relocation.
+
+``K``
+  A 3-bit unsigned integer constant.
+
+``L``
+  A 6-bit unsigned integer constant.
+
+``CnL``
+  One's complement of a 6-bit unsigned integer constant.
+
+``CmL``
+  Two's complement of a 6-bit unsigned integer constant.
+
+``M``
+  A 5-bit unsigned integer constant.
+
+``O``
+  A 7-bit unsigned integer constant.
+
+``P``
+  A 8-bit unsigned integer constant.
+
+``H``
+  Any const_double value.
+
+ARM family---:samp:`{config/arm/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``h``
+  In Thumb state, the core registers ``r8`` - ``r15``.
+
+``k``
+  The stack pointer register.
+
+``l``
+  In Thumb State the core registers ``r0`` - ``r7``.  In ARM state this
+  is an alias for the ``r`` constraint.
+
+``t``
+  VFP floating-point registers ``s0`` - ``s31``.  Used for 32 bit values.
+
+``w``
+  VFP floating-point registers ``d0`` - ``d31`` and the appropriate
+  subset ``d0`` - ``d15`` based on command line options.
+  Used for 64 bit values only.  Not valid for Thumb1.
+
+``y``
+  The iWMMX co-processor registers.
+
+``z``
+  The iWMMX GR registers.
+
+``G``
+  The floating-point constant 0.0
+
+``I``
+  Integer that is valid as an immediate operand in a data processing
+  instruction.  That is, an integer in the range 0 to 255 rotated by a
+  multiple of 2
+
+``J``
+  Integer in the range -4095 to 4095
+
+``K``
+  Integer that satisfies constraint :samp:`I` when inverted (ones complement)
+
+``L``
+  Integer that satisfies constraint :samp:`I` when negated (twos complement)
+
+``M``
+  Integer in the range 0 to 32
+
+``Q``
+  A memory reference where the exact address is in a single register
+  (':samp:`m`' is preferable for ``asm`` statements)
+
+``R``
+  An item in the constant pool
+
+``S``
+  A symbol in the text segment of the current file
+
+``Uv``
+  A memory reference suitable for VFP load/store insns (reg+constant offset)
+
+``Uy``
+  A memory reference suitable for iWMMXt load/store instructions.
+
+``Uq``
+  A memory reference suitable for the ARMv4 ldrsb instruction.
+
+AVR family---:samp:`{config/avr/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``l``
+  Registers from r0 to r15
+
+``a``
+  Registers from r16 to r23
+
+``d``
+  Registers from r16 to r31
+
+``w``
+  Registers from r24 to r31.  These registers can be used in :samp:`adiw` command
+
+``e``
+  Pointer register (r26--r31)
+
+``b``
+  Base pointer register (r28--r31)
+
+``q``
+  Stack pointer register (SPH:SPL)
+
+``t``
+  Temporary register r0
+
+``x``
+  Register pair X (r27:r26)
+
+``y``
+  Register pair Y (r29:r28)
+
+``z``
+  Register pair Z (r31:r30)
+
+``I``
+  Constant greater than -1, less than 64
+
+``J``
+  Constant greater than -64, less than 1
+
+``K``
+  Constant integer 2
+
+``L``
+  Constant integer 0
+
+``M``
+  Constant that fits in 8 bits
+
+``N``
+  Constant integer -1
+
+``O``
+  Constant integer 8, 16, or 24
+
+``P``
+  Constant integer 1
+
+``G``
+  A floating point constant 0.0
+
+``Q``
+  A memory address based on Y or Z pointer with displacement.
+
+Blackfin family---:samp:`{config/bfin/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  P register
+
+``d``
+  D register
+
+``z``
+  A call clobbered P register.
+
+:samp:`q{n}`
+  A single register.  If :samp:`{n}` is in the range 0 to 7, the corresponding D
+  register.  If it is ``A``, then the register P0.
+
+``D``
+  Even-numbered D register
+
+``W``
+  Odd-numbered D register
+
+``e``
+  Accumulator register.
+
+``A``
+  Even-numbered accumulator register.
+
+``B``
+  Odd-numbered accumulator register.
+
+``b``
+  I register
+
+``v``
+  B register
+
+``f``
+  M register
+
+``c``
+  Registers used for circular buffering, i.e. I, B, or L registers.
+
+``C``
+  The CC register.
+
+``t``
+  LT0 or LT1.
+
+``k``
+  LC0 or LC1.
+
+``u``
+  LB0 or LB1.
+
+``x``
+  Any D, P, B, M, I or L register.
+
+``y``
+  Additional registers typically used only in prologues and epilogues: RETS,
+  RETN, RETI, RETX, RETE, ASTAT, SEQSTAT and USP.
+
+``w``
+  Any register except accumulators or CC.
+
+``Ksh``
+  Signed 16 bit integer (in the range -32768 to 32767)
+
+``Kuh``
+  Unsigned 16 bit integer (in the range 0 to 65535)
+
+``Ks7``
+  Signed 7 bit integer (in the range -64 to 63)
+
+``Ku7``
+  Unsigned 7 bit integer (in the range 0 to 127)
+
+``Ku5``
+  Unsigned 5 bit integer (in the range 0 to 31)
+
+``Ks4``
+  Signed 4 bit integer (in the range -8 to 7)
+
+``Ks3``
+  Signed 3 bit integer (in the range -3 to 4)
+
+``Ku3``
+  Unsigned 3 bit integer (in the range 0 to 7)
+
+:samp:`P{n}`
+  Constant :samp:`{n}`, where :samp:`{n}` is a single-digit constant in the range 0 to 4.
+
+``PA``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use with either accumulator.
+
+``PB``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use only with accumulator A1.
+
+``M1``
+  Constant 255.
+
+``M2``
+  Constant 65535.
+
+``J``
+  An integer constant with exactly a single bit set.
+
+``L``
+  An integer constant with all bits set except exactly one.
+
+``H``, ``Q``
+
+  Any SYMBOL_REF.
+
+C-SKY---:samp:`{config/csky/constraints.md}`
+
+``a``
+  The mini registers r0 - r7.
+
+``b``
+  The low registers r0 - r15.
+
+``c``
+  C register.
+
+``y``
+  HI and LO registers.
+
+``l``
+  LO register.
+
+``h``
+  HI register.
+
+``v``
+  Vector registers.
+
+``z``
+  Stack pointer register (SP).
+
+``Q``
+  A memory address which uses a base register with a short offset
+  or with a index register with its scale.
+
+``W``
+  A memory address which uses a base register with a index register
+  with its scale.
+
+.. only:: gccint
+
+  The C-SKY back end supports a large set of additional constraints
+  that are only useful for instruction selection or splitting rather
+  than inline asm, such as constraints representing constant integer
+  ranges accepted by particular instruction encodings.
+  Refer to the source code for details.
+
+Epiphany---:samp:`{config/epiphany/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``U16``
+  An unsigned 16-bit constant.
+
+``K``
+  An unsigned 5-bit constant.
+
+``L``
+  A signed 11-bit constant.
+
+``Cm1``
+  A signed 11-bit constant added to -1.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cl1``
+  Left-shift of -1, i.e., a bit mask with a block of leading ones, the rest
+  being a block of trailing zeroes.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cr1``
+  Right-shift of -1, i.e., a bit mask with a trailing block of ones, the
+  rest being zeroes.  Or to put it another way, one less than a power of two.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cal``
+  Constant for arithmetic/logical operations.
+  This is like ``i``, except that for position independent code,
+  no symbols / expressions needing relocations are allowed.
+
+``Csy``
+  Symbolic constant for call/jump instruction.
+
+``Rcs``
+  The register class usable in short insns.  This is a register class
+  constraint, and can thus drive register allocation.
+  This constraint won't match unless :option:`-mprefer-short-insn-regs` is
+  in effect.
+
+``Rsc``
+  The register class of registers that can be used to hold a
+  sibcall call address.  I.e., a caller-saved register.
+
+``Rct``
+  Core control register class.
+
+``Rgs``
+  The register group usable in short insns.
+  This constraint does not use a register class, so that it only
+  passively matches suitable registers, and doesn't drive register allocation.
+
+.. only:: gccint
+
+  ``Car``
+    Constant suitable for the addsi3_r pattern.  This is a valid offset
+    For byte, halfword, or word addressing.
+
+``Rra``
+  Matches the return address if it can be replaced with the link register.
+
+``Rcc``
+  Matches the integer condition code register.
+
+``Sra``
+  Matches the return address if it is in a stack slot.
+
+``Cfm``
+  Matches control register values to switch fp mode, which are encapsulated in
+  ``UNSPEC_FP_MODE``.
+
+FRV---:samp:`{config/frv/frv.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register in the class ``ACC_REGS`` (``acc0`` to ``acc7``).
+
+``b``
+  Register in the class ``EVEN_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``c``
+  Register in the class ``CC_REGS`` (``fcc0`` to ``fcc3`` and
+  ``icc0`` to ``icc3``).
+
+``d``
+  Register in the class ``GPR_REGS`` (``gr0`` to ``gr63``).
+
+``e``
+  Register in the class ``EVEN_REGS`` (``gr0`` to ``gr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``f``
+  Register in the class ``FPR_REGS`` (``fr0`` to ``fr63``).
+
+``h``
+  Register in the class ``FEVEN_REGS`` (``fr0`` to ``fr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``l``
+  Register in the class ``LR_REG`` (the ``lr`` register).
+
+``q``
+  Register in the class ``QUAD_REGS`` (``gr2`` to ``gr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``t``
+  Register in the class ``ICC_REGS`` (``icc0`` to ``icc3``).
+
+``u``
+  Register in the class ``FCC_REGS`` (``fcc0`` to ``fcc3``).
+
+``v``
+  Register in the class ``ICR_REGS`` (``cc4`` to ``cc7``).
+
+``w``
+  Register in the class ``FCR_REGS`` (``cc0`` to ``cc3``).
+
+``x``
+  Register in the class ``QUAD_FPR_REGS`` (``fr0`` to ``fr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``z``
+  Register in the class ``SPR_REGS`` (``lcr`` and ``lr``).
+
+``A``
+  Register in the class ``QUAD_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``B``
+  Register in the class ``ACCG_REGS`` (``accg0`` to ``accg7``).
+
+``C``
+  Register in the class ``CR_REGS`` (``cc0`` to ``cc7``).
+
+``G``
+  Floating point constant zero
+
+``I``
+  6-bit signed integer constant
+
+``J``
+  10-bit signed integer constant
+
+``L``
+  16-bit signed integer constant
+
+``M``
+  16-bit unsigned integer constant
+
+``N``
+  12-bit signed integer constant that is negative---i.e. in the
+  range of -2048 to -1
+
+``O``
+  Constant zero
+
+``P``
+  12-bit signed integer constant that is greater than zero---i.e. in the
+  range of 1 to 2047.
+
+FT32---:samp:`{config/ft32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``e``
+  An offset address.
+
+``f``
+  An offset address.
+
+``O``
+  The constant zero or one
+
+``I``
+  A 16-bit signed constant (-32768 ... 32767)
+
+``w``
+  A bitfield mask suitable for bext or bins
+
+``x``
+  An inverted bitfield mask suitable for bext or bins
+
+``L``
+  A 16-bit unsigned constant, multiple of 4 (0 ... 65532)
+
+``S``
+  A 20-bit signed constant (-524288 ... 524287)
+
+``b``
+  A constant for a bitfield width (1 ... 16)
+
+``KA``
+  A 10-bit signed constant (-512 ... 511)
+
+Hewlett-Packard PA-RISC---:samp:`{config/pa/pa.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register 1
+
+``f``
+  Floating point register
+
+``q``
+  Shift amount register
+
+``x``
+  Floating point register (deprecated)
+
+``y``
+  Upper floating point register (32-bit), floating point register (64-bit)
+
+``Z``
+  Any register
+
+``I``
+  Signed 11-bit integer constant
+
+``J``
+  Signed 14-bit integer constant
+
+``K``
+  Integer constant that can be deposited with a ``zdepi`` instruction
+
+``L``
+  Signed 5-bit integer constant
+
+``M``
+  Integer constant 0
+
+``N``
+  Integer constant that can be loaded with a ``ldil`` instruction
+
+``O``
+  Integer constant whose value plus one is a power of 2
+
+``P``
+  Integer constant that can be used for ``and`` operations in ``depi``
+  and ``extru`` instructions
+
+``S``
+  Integer constant 31
+
+``U``
+  Integer constant 63
+
+``G``
+  Floating-point constant 0.0
+
+``A``
+  A ``lo_sum`` data-linkage-table memory operand
+
+``Q``
+  A memory operand that can be used as the destination operand of an
+  integer store instruction
+
+``R``
+  A scaled or unscaled indexed memory operand
+
+``T``
+  A memory operand for floating-point loads and stores
+
+``W``
+  A register indirect memory operand
+
+Intel IA-64---:samp:`{config/ia64/ia64.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register ``r0`` to ``r3`` for ``addl`` instruction
+
+``b``
+  Branch register
+
+``c``
+  Predicate register (:samp:`c` as in 'conditional')
+
+``d``
+  Application register residing in M-unit
+
+``e``
+  Application register residing in I-unit
+
+``f``
+  Floating-point register
+
+``m``
+  Memory operand.  If used together with :samp:`<` or :samp:`>`,
+  the operand can have postincrement and postdecrement which
+  require printing with :samp:`%Pn` on IA-64.
+
+``G``
+  Floating-point constant 0.0 or 1.0
+
+``I``
+  14-bit signed integer constant
+
+``J``
+  22-bit signed integer constant
+
+``K``
+  8-bit signed integer constant for logical instructions
+
+``L``
+  8-bit adjusted signed integer constant for compare pseudo-ops
+
+``M``
+  6-bit unsigned integer constant for shift counts
+
+``N``
+  9-bit signed integer constant for load and store postincrements
+
+``O``
+  The constant zero
+
+``P``
+  0 or -1 for ``dep`` instruction
+
+``Q``
+  Non-volatile memory for floating-point loads and stores
+
+``R``
+  Integer constant in the range 1 to 4 for ``shladd`` instruction
+
+``S``
+  Memory operand except postincrement and postdecrement.  This is
+  now roughly the same as :samp:`m` when not used together with :samp:`<`
+  or :samp:`>`.
+
+M32C---:samp:`{config/m32c/m32c.cc}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Rsp`` ``Rfb`` ``Rsb``
+  :samp:`$sp`, :samp:`$fb`, :samp:`$sb`.
+
+``Rcr``
+  Any control register, when they're 16 bits wide (nothing if control
+  registers are 24 bits wide)
+
+``Rcl``
+  Any control register, when they're 24 bits wide.
+
+``R0w`` ``R1w`` ``R2w`` ``R3w``
+  $r0, $r1, $r2, $r3.
+
+``R02``
+  $r0 or $r2, or $r2r0 for 32 bit values.
+
+``R13``
+  $r1 or $r3, or $r3r1 for 32 bit values.
+
+``Rdi``
+  A register that can hold a 64 bit value.
+
+``Rhl``
+  $r0 or $r1 (registers with addressable high/low bytes)
+
+``R23``
+  $r2 or $r3
+
+``Raa``
+  Address registers
+
+``Raw``
+  Address registers when they're 16 bits wide.
+
+``Ral``
+  Address registers when they're 24 bits wide.
+
+``Rqi``
+  Registers that can hold QI values.
+
+``Rad``
+  Registers that can be used with displacements ($a0, $a1, $sb).
+
+``Rsi``
+  Registers that can hold 32 bit values.
+
+``Rhi``
+  Registers that can hold 16 bit values.
+
+``Rhc``
+  Registers chat can hold 16 bit values, including all control
+  registers.
+
+``Rra``
+  $r0 through R1, plus $a0 and $a1.
+
+``Rfl``
+  The flags register.
+
+``Rmm``
+  The memory-based pseudo-registers $mem0 through $mem15.
+
+``Rpi``
+  Registers that can hold pointers (16 bit registers for r8c, m16c; 24
+  bit registers for m32cm, m32c).
+
+``Rpa``
+  Matches multiple registers in a PARALLEL to form a larger register.
+  Used to match function return values.
+
+``Is3``
+  -8 ... 7
+
+``IS1``
+  -128 ... 127
+
+``IS2``
+  -32768 ... 32767
+
+``IU2``
+  0 ... 65535
+
+``In4``
+  -8 ... -1 or 1 ... 8
+
+``In5``
+  -16 ... -1 or 1 ... 16
+
+``In6``
+  -32 ... -1 or 1 ... 32
+
+``IM2``
+  -65536 ... -1
+
+``Ilb``
+  An 8 bit value with exactly one bit set.
+
+``Ilw``
+  A 16 bit value with exactly one bit set.
+
+``Sd``
+  The common src/dest memory addressing modes.
+
+``Sa``
+  Memory addressed using $a0 or $a1.
+
+``Si``
+  Memory addressed with immediate addresses.
+
+``Ss``
+  Memory addressed using the stack pointer ($sp).
+
+``Sf``
+  Memory addressed using the frame base register ($fb).
+
+``Ss``
+  Memory addressed using the small base register ($sb).
+
+``S1``
+  $r1h
+
+LoongArch---:samp:`{config/loongarch/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``k``
+  A memory operand whose address is formed by a base register and
+  (optionally scaled) index register.
+
+``l``
+  A signed 16-bit constant.
+
+``m``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``st.w`` and ``ld.w``.
+
+``I``
+  A signed 12-bit constant (for arithmetic instructions).
+
+``K``
+  An unsigned 12-bit constant (for logic instructions).
+
+``ZB``
+  An address that is held in a general-purpose register.
+  The offset is zero.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll.w`` and ``sc.w``.
+
+MicroBlaze---:samp:`{config/microblaze/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general register (``r0`` to ``r31``).
+
+``z``
+  A status register (``rmsr``, ``$fcc1`` to ``$fcc7``).
+
+MIPS---:samp:`{config/mips/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general-purpose register.  This is equivalent to ``r`` unless
+  generating MIPS16 code, in which case the MIPS16 register set is used.
+
+``f``
+  A floating-point register (if available).
+
+``h``
+  Formerly the ``hi`` register.  This constraint is no longer supported.
+
+``l``
+  The ``lo`` register.  Use this register to store values that are
+  no bigger than a word.
+
+``x``
+  The concatenated ``hi`` and ``lo`` registers.  Use this register
+  to store doubleword values.
+
+``c``
+  A register suitable for use in an indirect jump.  This will always be
+  ``$25`` for :option:`-mabicalls`.
+
+``v``
+  Register ``$3``.  Do not use this constraint in new code;
+  it is retained only for compatibility with glibc.
+
+``y``
+  Equivalent to ``r`` ; retained for backwards compatibility.
+
+``z``
+  A floating-point condition code register.
+
+``I``
+  A signed 16-bit constant (for arithmetic instructions).
+
+``J``
+  Integer zero.
+
+``K``
+  An unsigned 16-bit constant (for logic instructions).
+
+``L``
+  A signed 32-bit constant in which the lower 16 bits are zero.
+  Such constants can be loaded using ``lui``.
+
+``M``
+  A constant that cannot be loaded using ``lui``, ``addiu``
+  or ``ori``.
+
+``N``
+  A constant in the range -65535 to -1 (inclusive).
+
+``O``
+  A signed 15-bit constant.
+
+``P``
+  A constant in the range 1 to 65535 (inclusive).
+
+``G``
+  Floating-point zero.
+
+``R``
+  An address that can be used in a non-macro load or store.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll`` and ``sc``.
+
+``ZD``
+  An address suitable for a ``prefetch`` instruction, or for any other
+  instruction with the same addressing mode as ``prefetch``.
+
+Motorola 680x0---:samp:`{config/m68k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register
+
+``d``
+  Data register
+
+``f``
+  68881 floating-point register, if available
+
+``I``
+  Integer in the range 1 to 8
+
+``J``
+  16-bit signed number
+
+``K``
+  Signed number whose magnitude is greater than 0x80
+
+``L``
+  Integer in the range -8 to -1
+
+``M``
+  Signed number whose magnitude is greater than 0x100
+
+``N``
+  Range 24 to 31, rotatert:SI 8 to 1 expressed as rotate
+
+``O``
+  16 (for rotate using swap)
+
+``P``
+  Range 8 to 15, rotatert:HI 8 to 1 expressed as rotate
+
+``R``
+  Numbers that mov3q can handle
+
+``G``
+  Floating point constant that is not a 68881 constant
+
+``S``
+  Operands that satisfy 'm' when -mpcrel is in effect
+
+``T``
+  Operands that satisfy 's' when -mpcrel is not in effect
+
+``Q``
+  Address register indirect addressing mode
+
+``U``
+  Register offset addressing
+
+``W``
+  const_call_operand
+
+``Cs``
+  symbol_ref or const
+
+``Ci``
+  const_int
+
+``C0``
+  const_int 0
+
+``Cj``
+  Range of signed numbers that don't fit in 16 bits
+
+``Cmvq``
+  Integers valid for mvq
+
+``Capsw``
+  Integers valid for a moveq followed by a swap
+
+``Cmvz``
+  Integers valid for mvz
+
+``Cmvs``
+  Integers valid for mvs
+
+``Ap``
+  push_operand
+
+``Ac``
+  Non-register operands allowed in clr
+
+Moxie---:samp:`{config/moxie/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``I``
+  A constant in the range of 0 to 255.
+
+``N``
+  A constant in the range of 0 to -255.
+
+MSP430---:samp:`{config/msp430/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R12``
+  Register R12.
+
+``R13``
+  Register R13.
+
+``K``
+  Integer constant 1.
+
+``L``
+  Integer constant -1^20..1^19.
+
+``M``
+  Integer constant 1-4.
+
+``Ya``
+  Memory references which do not require an extended MOVX instruction.
+
+``Yl``
+  Memory reference, labels only.
+
+``Ys``
+  Memory reference, stack only.
+
+NDS32---:samp:`{config/nds32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``w``
+  LOW register class $r0 to $r7 constraint for V3/V3M ISA.
+
+``l``
+  LOW register class $r0 to $r7.
+
+``d``
+  MIDDLE register class $r0 to $r11, $r16 to $r19.
+
+``h``
+  HIGH register class $r12 to $r14, $r20 to $r31.
+
+``t``
+  Temporary assist register $ta (i.e. $r15).
+
+``k``
+  Stack register $sp.
+
+``Iu03``
+  Unsigned immediate 3-bit value.
+
+``In03``
+  Negative immediate 3-bit value in the range of -7--0.
+
+``Iu04``
+  Unsigned immediate 4-bit value.
+
+``Is05``
+  Signed immediate 5-bit value.
+
+``Iu05``
+  Unsigned immediate 5-bit value.
+
+``In05``
+  Negative immediate 5-bit value in the range of -31--0.
+
+``Ip05``
+  Unsigned immediate 5-bit value for movpi45 instruction with range 16--47.
+
+``Iu06``
+  Unsigned immediate 6-bit value constraint for addri36.sp instruction.
+
+``Iu08``
+  Unsigned immediate 8-bit value.
+
+``Iu09``
+  Unsigned immediate 9-bit value.
+
+``Is10``
+  Signed immediate 10-bit value.
+
+``Is11``
+  Signed immediate 11-bit value.
+
+``Is15``
+  Signed immediate 15-bit value.
+
+``Iu15``
+  Unsigned immediate 15-bit value.
+
+``Ic15``
+  A constant which is not in the range of imm15u but ok for bclr instruction.
+
+``Ie15``
+  A constant which is not in the range of imm15u but ok for bset instruction.
+
+``It15``
+  A constant which is not in the range of imm15u but ok for btgl instruction.
+
+``Ii15``
+  A constant whose compliment value is in the range of imm15u
+  and ok for bitci instruction.
+
+``Is16``
+  Signed immediate 16-bit value.
+
+``Is17``
+  Signed immediate 17-bit value.
+
+``Is19``
+  Signed immediate 19-bit value.
+
+``Is20``
+  Signed immediate 20-bit value.
+
+``Ihig``
+  The immediate value that can be simply set high 20-bit.
+
+``Izeb``
+  The immediate value 0xff.
+
+``Izeh``
+  The immediate value 0xffff.
+
+``Ixls``
+  The immediate value 0x01.
+
+``Ix11``
+  The immediate value 0x7ff.
+
+``Ibms``
+  The immediate value with power of 2.
+
+``Ifex``
+  The immediate value with power of 2 minus 1.
+
+``U33``
+  Memory constraint for 333 format.
+
+``U45``
+  Memory constraint for 45 format.
+
+``U37``
+  Memory constraint for 37 format.
+
+Nios II family---:samp:`{config/nios2/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``J``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking only the upper 16-bits of a
+  32-bit number. Range 32-bit numbers with the lower
+  16-bits being 0.
+
+``L``
+  Integer that is valid as an immediate operand for a
+  shift instruction. Range 0 to 31.
+
+``M``
+  Integer that is valid as an immediate operand for
+  only the value 0. Can be used in conjunction with
+  the format modifier ``z`` to use ``r0``
+  instead of ``0`` in the assembly output.
+
+``N``
+  Integer that is valid as an immediate operand for
+  a custom instruction opcode. Range 0 to 255.
+
+``P``
+  An immediate operand for R2 andchi/andci instructions.
+
+``S``
+  Matches immediates which are addresses in the small
+  data section and therefore can be added to ``gp``
+  as a 16-bit immediate to re-create their 32-bit value.
+
+``U``
+  Matches constants suitable as an operand for the rdprs and
+  cache instructions.
+
+``v``
+  A memory operand suitable for Nios II R2 load/store
+  exclusive instructions.
+
+``w``
+  A memory operand suitable for load/store IO and cache
+  instructions.
+
+.. only:: gccint
+
+  ``T``
+    A ``const`` wrapped ``UNSPEC`` expression,
+    representing a supported PIC or TLS relocation.
+
+OpenRISC---:samp:`{config/or1k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``M``
+  Signed 16-bit constant shifted left 16 bits. (Used with ``l.movhi``)
+
+``O``
+  Zero
+
+.. only:: gccint
+
+  ``c``
+    Register usable for sibcalls.
+
+PDP-11---:samp:`{config/pdp11/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Floating point registers AC0 through AC3.  These can be loaded from/to
+  memory with a single instruction.
+
+``d``
+  Odd numbered general registers (R1, R3, R5).  These are used for
+  16-bit multiply operations.
+
+``D``
+  A memory reference that is encoded within the opcode, but not
+  auto-increment or auto-decrement.
+
+``f``
+  Any of the floating point registers (AC0 through AC5).
+
+``G``
+  Floating point constant 0.
+
+``h``
+  Floating point registers AC4 and AC5.  These cannot be loaded from/to
+  memory with a single instruction.
+
+``I``
+  An integer constant that fits in 16 bits.
+
+``J``
+  An integer constant whose low order 16 bits are zero.
+
+``K``
+  An integer constant that does not meet the constraints for codes
+  :samp:`I` or :samp:`J`.
+
+``L``
+  The integer constant 1.
+
+``M``
+  The integer constant -1.
+
+``N``
+  The integer constant 0.
+
+``O``
+  Integer constants 0 through 3; shifts by these
+  amounts are handled as multiple single-bit shifts rather than a single
+  variable-length shift.
+
+``Q``
+  A memory reference which requires an additional word (address or
+  offset) after the opcode.
+
+``R``
+  A memory reference that is encoded within the opcode.
+
+PowerPC and IBM RS6000---:samp:`{config/rs6000/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``r``
+  A general purpose register (GPR), ``r0``... ``r31``.
+
+``b``
+  A base register.  Like ``r``, but ``r0`` is not allowed, so
+  ``r1``... ``r31``.
+
+``f``
+  A floating point register (FPR), ``f0``... ``f31``.
+
+``d``
+  A floating point register.  This is the same as ``f`` nowadays;
+  historically ``f`` was for single-precision and ``d`` was for
+  double-precision floating point.
+
+``v``
+  An Altivec vector register (VR), ``v0``... ``v31``.
+
+``wa``
+  A VSX register (VSR), ``vs0``... ``vs63``.  This is either an
+  FPR (``vs0``... ``vs31`` are ``f0``... ``f31``) or a VR
+  (``vs32``... ``vs63`` are ``v0``... ``v31``).
+
+  When using ``wa``, you should use the ``%x`` output modifier, so that
+  the correct register number is printed.  For example:
+
+  .. code-block:: c++
+
+    asm ("xvadddp %x0,%x1,%x2"
+         : "=wa" (v1)
+         : "wa" (v2), "wa" (v3));
+
+  You should not use ``%x`` for ``v`` operands:
+
+  .. code-block:: c++
+
+    asm ("xsaddqp %0,%1,%2"
+         : "=v" (v1)
+         : "v" (v2), "v" (v3));
+
+.. only:: gccint
+
+  ``h``
+    A special register (``vrsave``, ``ctr``, or ``lr``).
+
+``c``
+  The count register, ``ctr``.
+
+``l``
+  The link register, ``lr``.
+
+``x``
+  Condition register field 0, ``cr0``.
+
+``y``
+  Any condition register field, ``cr0``... ``cr7``.
+
+.. only:: gccint
+
+  ``z``
+    The carry bit, ``XER[CA]``.
+
+  ``we``
+    Like ``wa``, if :option:`-mpower9-vector` and :option:`-m64` are used;
+    otherwise, ``NO_REGS``.
+
+  ``wn``
+    No register (``NO_REGS``).
+
+  ``wr``
+    Like ``r``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wx``
+    Like ``d``, if :option:`-mpowerpc-gfxopt` is used; otherwise, ``NO_REGS``.
+
+  ``wA``
+    Like ``b``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wB``
+    Signed 5-bit constant integer that can be loaded into an Altivec register.
+
+  ``wE``
+    Vector constant that can be loaded with the XXSPLTIB instruction.
+
+  ``wF``
+    Memory operand suitable for power8 GPR load fusion.
+
+  ``wL``
+    Int constant that is the element number mfvsrld accesses in a vector.
+
+  ``wM``
+    Match vector constant with all 1's if the XXLORC instruction is available.
+
+  ``wO``
+    Memory operand suitable for the ISA 3.0 vector d-form instructions.
+
+  ``wQ``
+    Memory operand suitable for the load/store quad instructions.
+
+  ``wS``
+    Vector constant that can be loaded with XXSPLTIB & sign extension.
+
+  ``wY``
+    A memory operand for a DS-form instruction.
+
+  ``wZ``
+    An indexed or indirect memory operand, ignoring the bottom 4 bits.
+
+``I``
+  A signed 16-bit constant.
+
+``J``
+  An unsigned 16-bit constant shifted left 16 bits (use ``L`` instead
+  for ``SImode`` constants).
+
+``K``
+  An unsigned 16-bit constant.
+
+``L``
+  A signed 16-bit constant shifted left 16 bits.
+
+.. only:: gccint
+
+  ``M``
+    An integer constant greater than 31.
+
+  ``N``
+    An exact power of 2.
+
+  ``O``
+    The integer constant zero.
+
+  ``P``
+    A constant whose negation is a signed 16-bit constant.
+
+``eI``
+  A signed 34-bit integer constant if prefixed instructions are supported.
+
+``eQ``
+  An IEEE 128-bit constant that can be loaded into a VSX register with
+  the ``lxvkq`` instruction.
+
+.. only:: gccint
+
+  ``G``
+    A floating point constant that can be loaded into a register with one
+    instruction per word.
+
+  ``H``
+    A floating point constant that can be loaded into a register using
+    three instructions.
+
+``m``
+  A memory operand.
+  Normally, ``m`` does not allow addresses that update the base register.
+  If the ``<`` or ``>`` constraint is also used, they are allowed and
+  therefore on PowerPC targets in that case it is only safe
+  to use ``m<>`` in an ``asm`` statement if that ``asm`` statement
+  accesses the operand exactly once.  The ``asm`` statement must also
+  use ``%U<opno>`` as a placeholder for the 'update' flag in the
+  corresponding load or store instruction.  For example:
+
+  .. code-block:: c++
+
+    asm ("st%U0 %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is correct but:
+
+  .. code-block:: c++
+
+    asm ("st %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is not.
+
+.. only:: gccint
+
+  ``es``
+    A 'stable' memory operand; that is, one which does not include any
+    automodification of the base register.  This used to be useful when
+    ``m`` allowed automodification of the base register, but as those
+    are now only allowed when ``<`` or ``>`` is used, ``es`` is
+    basically the same as ``m`` without ``<`` and ``>``.
+
+``Q``
+  A memory operand addressed by just a base register.
+
+.. only:: gccint
+
+  ``Y``
+    A memory operand for a DQ-form instruction.
+
+``Z``
+  A memory operand accessed with indexed or indirect addressing.
+
+.. only:: gccint
+
+  ``R``
+    An AIX TOC entry.
+
+``a``
+  An indexed or indirect address.
+
+.. only:: gccint
+
+  ``U``
+    A V.4 small data reference.
+
+  ``W``
+    A vector constant that does not require memory.
+
+  ``j``
+    The zero vector constant.
+
+PRU---:samp:`{config/pru/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  An unsigned 8-bit integer constant.
+
+``J``
+  An unsigned 16-bit integer constant.
+
+``L``
+  An unsigned 5-bit integer constant (for shift counts).
+
+``T``
+  A text segment (program memory) constant label.
+
+``Z``
+  Integer constant zero.
+
+RL78---:samp:`{config/rl78/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Int3``
+  An integer constant in the range 1 ... 7.
+
+``Int8``
+  An integer constant in the range 0 ... 255.
+
+``J``
+  An integer constant in the range -255 ... 0
+
+``K``
+  The integer constant 1.
+
+``L``
+  The integer constant -1.
+
+``M``
+  The integer constant 0.
+
+``N``
+  The integer constant 2.
+
+``O``
+  The integer constant -2.
+
+``P``
+  An integer constant in the range 1 ... 15.
+
+``Qbi``
+  The built-in compare types--eq, ne, gtu, ltu, geu, and leu.
+
+``Qsc``
+  The synthetic compare types--gt, lt, ge, and le.
+
+``Wab``
+  A memory reference with an absolute address.
+
+``Wbc``
+  A memory reference using ``BC`` as a base register, with an optional offset.
+
+``Wca``
+  A memory reference using ``AX``, ``BC``, ``DE``, or ``HL`` for the address, for calls.
+
+``Wcv``
+  A memory reference using any 16-bit register pair for the address, for calls.
+
+``Wd2``
+  A memory reference using ``DE`` as a base register, with an optional offset.
+
+``Wde``
+  A memory reference using ``DE`` as a base register, without any offset.
+
+``Wfr``
+  Any memory reference to an address in the far address space.
+
+``Wh1``
+  A memory reference using ``HL`` as a base register, with an optional one-byte offset.
+
+``Whb``
+  A memory reference using ``HL`` as a base register, with ``B`` or ``C`` as the index register.
+
+``Whl``
+  A memory reference using ``HL`` as a base register, without any offset.
+
+``Ws1``
+  A memory reference using ``SP`` as a base register, with an optional one-byte offset.
+
+``Y``
+  Any memory reference to an address in the near address space.
+
+``A``
+  The ``AX`` register.
+
+``B``
+  The ``BC`` register.
+
+``D``
+  The ``DE`` register.
+
+``R``
+  ``A`` through ``L`` registers.
+
+``S``
+  The ``SP`` register.
+
+``T``
+  The ``HL`` register.
+
+``Z08W``
+  The 16-bit ``R8`` register.
+
+``Z10W``
+  The 16-bit ``R10`` register.
+
+``Zint``
+  The registers reserved for interrupts (``R24`` to ``R31``).
+
+``a``
+  The ``A`` register.
+
+``b``
+  The ``B`` register.
+
+``c``
+  The ``C`` register.
+
+``d``
+  The ``D`` register.
+
+``e``
+  The ``E`` register.
+
+``h``
+  The ``H`` register.
+
+``l``
+  The ``L`` register.
+
+``v``
+  The virtual registers.
+
+``w``
+  The ``PSW`` register.
+
+``x``
+  The ``X`` register.
+
+RISC-V---:samp:`{config/riscv/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``I``
+  An I-type 12-bit signed immediate.
+
+``J``
+  Integer zero.
+
+``K``
+  A 5-bit unsigned immediate for CSR access instructions.
+
+``A``
+  An address that is held in a general-purpose register.
+
+``S``
+  A constraint that matches an absolute symbolic address.
+
+RX---:samp:`{config/rx/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Q``
+  An address which does not involve register indirect addressing or
+  pre/post increment/decrement addressing.
+
+``Symbol``
+  A symbol reference.
+
+``Int08``
+  A constant in the range -256 to 255, inclusive.
+
+``Sint08``
+  A constant in the range -128 to 127, inclusive.
+
+``Sint16``
+  A constant in the range -32768 to 32767, inclusive.
+
+``Sint24``
+  A constant in the range -8388608 to 8388607, inclusive.
+
+``Uint04``
+  A constant in the range 0 to 15, inclusive.
+
+S/390 and zSeries---:samp:`{config/s390/s390.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register (general purpose register except r0)
+
+``c``
+  Condition code register
+
+``d``
+  Data register (arbitrary general purpose register)
+
+``f``
+  Floating-point register
+
+``I``
+  Unsigned 8-bit constant (0--255)
+
+``J``
+  Unsigned 12-bit constant (0--4095)
+
+``K``
+  Signed 16-bit constant (-32768--32767)
+
+``L``
+  Value appropriate as displacement.
+
+  ``(0..4095)``
+    for short displacement
+
+  ``(-524288..524287)``
+    for long displacement
+
+``M``
+  Constant integer with a value of 0x7fffffff.
+
+``N``
+  Multiple letter constraint followed by 4 parameter letters.
+
+  ``0..9:``
+    number of the part counting from most to least significant
+
+  ``H,Q:``
+    mode of the part
+
+  ``D,S,H:``
+    mode of the containing operand
+
+  ``0,F:``
+    value of the other parts (F---all bits set)
+
+  The constraint matches if the specified part of a constant
+  has a value different from its other parts.
+
+``Q``
+  Memory reference without index register and with short displacement.
+
+``R``
+  Memory reference with index register and short displacement.
+
+``S``
+  Memory reference without index register but with long displacement.
+
+``T``
+  Memory reference with index register and long displacement.
+
+``U``
+  Pointer with short displacement.
+
+``W``
+  Pointer with long displacement.
+
+``Y``
+  Shift count operand.
+
+SPARC---:samp:`{config/sparc/sparc.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  Floating-point register on the SPARC-V8 architecture and
+  lower floating-point register on the SPARC-V9 architecture.
+
+``e``
+  Floating-point register.  It is equivalent to :samp:`f` on the
+  SPARC-V8 architecture and contains both lower and upper
+  floating-point registers on the SPARC-V9 architecture.
+
+``c``
+  Floating-point condition code register.
+
+``d``
+  Lower floating-point register.  It is only valid on the SPARC-V9
+  architecture when the Visual Instruction Set is available.
+
+``b``
+  Floating-point register.  It is only valid on the SPARC-V9 architecture
+  when the Visual Instruction Set is available.
+
+``h``
+  64-bit global or out register for the SPARC-V8+ architecture.
+
+``C``
+  The constant all-ones, for floating-point.
+
+``A``
+  Signed 5-bit constant
+
+``D``
+  A vector constant
+
+``I``
+  Signed 13-bit constant
+
+``J``
+  Zero
+
+``K``
+  32-bit constant with the low 12 bits clear (a constant that can be
+  loaded with the ``sethi`` instruction)
+
+``L``
+  A constant in the range supported by ``movcc`` instructions (11-bit
+  signed immediate)
+
+``M``
+  A constant in the range supported by ``movrcc`` instructions (10-bit
+  signed immediate)
+
+``N``
+  Same as :samp:`K`, except that it verifies that bits that are not in the
+  lower 32-bit range are all zero.  Must be used instead of :samp:`K` for
+  modes wider than ``SImode``
+
+``O``
+  The constant 4096
+
+``G``
+  Floating-point zero
+
+``H``
+  Signed 13-bit constant, sign-extended to 32 or 64 bits
+
+``P``
+  The constant -1
+
+``Q``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single sethi
+  instruction
+
+``R``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single mov
+  instruction
+
+``S``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a high/lo_sum
+  instruction sequence
+
+``T``
+  Memory address aligned to an 8-byte boundary
+
+``U``
+  Even register
+
+``W``
+  Memory address for :samp:`e` constraint registers
+
+``w``
+  Memory address with only a base register
+
+``Y``
+  Vector zero
+
+TI C6X family---:samp:`{config/c6x/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register file A (A0--A31).
+
+``b``
+  Register file B (B0--B31).
+
+``A``
+  Predicate registers in register file A (A0--A2 on C64X and
+  higher, A1 and A2 otherwise).
+
+``B``
+  Predicate registers in register file B (B0--B2).
+
+``C``
+  A call-used register in register file B (B0--B9, B16--B31).
+
+``Da``
+  Register file A, excluding predicate registers (A3--A31,
+  plus A0 if not C64X or higher).
+
+``Db``
+  Register file B, excluding predicate registers (B3--B31).
+
+``Iu4``
+  Integer constant in the range 0 ... 15.
+
+``Iu5``
+  Integer constant in the range 0 ... 31.
+
+``In5``
+  Integer constant in the range -31 ... 0.
+
+``Is5``
+  Integer constant in the range -16 ... 15.
+
+``I5x``
+  Integer constant that can be the operand of an ADDA or a SUBA insn.
+
+``IuB``
+  Integer constant in the range 0 ... 65535.
+
+``IsB``
+  Integer constant in the range -32768 ... 32767.
+
+``IsC``
+  Integer constant in the range -2^{20} ... 2^{20} - 1.
+
+``Jc``
+  Integer constant that is a valid mask for the clr instruction.
+
+``Js``
+  Integer constant that is a valid mask for the set instruction.
+
+``Q``
+  Memory location with A base register.
+
+``R``
+  Memory location with B base register.
+
+.. only:: gccint
+
+  ``S0``
+    On C64x+ targets, a GP-relative small data reference.
+
+  ``S1``
+    Any kind of ``SYMBOL_REF``, for use in a call address.
+
+  ``Si``
+    Any kind of immediate operand, unless it matches the S0 constraint.
+
+  ``T``
+    Memory location with B base register, but not using a long offset.
+
+  ``W``
+    A memory operand with an address that cannot be used in an unaligned access.
+
+``Z``
+  Register B14 (aka DP).
+
+Visium---:samp:`{config/visium/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``b``
+  EAM register ``mdb``
+
+``c``
+  EAM register ``mdc``
+
+``f``
+  Floating point register
+
+.. only:: gccint
+
+  ``k``
+    Register for sibcall optimization
+
+``l``
+  General register, but not ``r29``, ``r30`` and ``r31``
+
+``t``
+  Register ``r1``
+
+``u``
+  Register ``r2``
+
+``v``
+  Register ``r3``
+
+``G``
+  Floating-point constant 0.0
+
+``J``
+  Integer constant in the range 0 .. 65535 (16-bit immediate)
+
+``K``
+  Integer constant in the range 1 .. 31 (5-bit immediate)
+
+``L``
+  Integer constant in the range -65535 .. -1 (16-bit negative immediate)
+
+``M``
+  Integer constant -1
+
+``O``
+  Integer constant 0
+
+``P``
+  Integer constant 32
+
+x86 family---:samp:`{config/i386/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R``
+  Legacy register---the eight integer registers available on all
+  i386 processors (``a``, ``b``, ``c``, ``d``,
+  ``si``, ``di``, ``bp``, ``sp``).
+
+``q``
+  Any register accessible as ``rl``.  In 32-bit mode, ``a``,
+  ``b``, ``c``, and ``d`` ; in 64-bit mode, any integer register.
+
+``Q``
+  Any register accessible as ``rh`` : ``a``, ``b``,
+  ``c``, and ``d``.
+
+.. only:: gccint
+
+  ``l``
+    Any register that can be used as the index in a base+index memory
+    access: that is, any general register except the stack pointer.
+
+``a``
+  The ``a`` register.
+
+``b``
+  The ``b`` register.
+
+``c``
+  The ``c`` register.
+
+``d``
+  The ``d`` register.
+
+``S``
+  The ``si`` register.
+
+``D``
+  The ``di`` register.
+
+``A``
+  The ``a`` and ``d`` registers.  This class is used for instructions
+  that return double word results in the ``ax:dx`` register pair.  Single
+  word values will be allocated either in ``ax`` or ``dx``.
+  For example on i386 the following implements ``rdtsc`` :
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned long long tick;
+      __asm__ __volatile__("rdtsc":"=A"(tick));
+      return tick;
+    }
+
+  This is not correct on x86-64 as it would allocate tick in either ``ax``
+  or ``dx``.  You have to use the following variant instead:
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned int tickl, tickh;
+      __asm__ __volatile__("rdtsc":"=a"(tickl),"=d"(tickh));
+      return ((unsigned long long)tickh << 32)|tickl;
+    }
+
+``U``
+  The call-clobbered integer registers.
+
+``f``
+  Any 80387 floating-point (stack) register.
+
+``t``
+  Top of 80387 floating-point stack (``%st(0)``).
+
+``u``
+  Second from top of 80387 floating-point stack (``%st(1)``).
+
+.. only:: gccint
+
+  ``Yk``
+    Any mask register that can be used as a predicate, i.e. ``k1-k7``.
+
+  ``k``
+    Any mask register.
+
+``y``
+  Any MMX register.
+
+``x``
+  Any SSE register.
+
+``v``
+  Any EVEX encodable SSE register (``%xmm0-%xmm31``).
+
+.. only:: gccint
+
+  ``w``
+    Any bound register.
+
+``Yz``
+  First SSE register (``%xmm0``).
+
+.. only:: gccint
+
+  ``Yi``
+    Any SSE register, when SSE2 and inter-unit moves are enabled.
+
+  ``Yj``
+    Any SSE register, when SSE2 and inter-unit moves from vector registers are enabled.
+
+  ``Ym``
+    Any MMX register, when inter-unit moves are enabled.
+
+  ``Yn``
+    Any MMX register, when inter-unit moves from vector registers are enabled.
+
+  ``Yp``
+    Any integer register when ``TARGET_PARTIAL_REG_STALL`` is disabled.
+
+  ``Ya``
+    Any integer register when zero extensions with ``AND`` are disabled.
+
+  ``Yb``
+    Any register that can be used as the GOT base when calling
+
+    ``___tls_get_addr`` : that is, any general register except ``a``
+    and ``sp`` registers, for :option:`-fno-plt` if linker supports it.
+    Otherwise, ``b`` register.
+
+  ``Yf``
+    Any x87 register when 80387 floating-point arithmetic is enabled.
+
+  ``Yr``
+    Lower SSE register when avoiding REX prefix and all SSE registers otherwise.
+
+  ``Yv``
+    For AVX512VL, any EVEX-encodable SSE register (``%xmm0-%xmm31``),
+    otherwise any SSE register.
+
+  ``Yh``
+    Any EVEX-encodable SSE register, that has number factor of four.
+
+  ``Bf``
+    Flags register operand.
+
+  ``Bg``
+    GOT memory operand.
+
+  ``Bm``
+    Vector memory operand.
+
+  ``Bc``
+    Constant memory operand.
+
+``Bn``
+  Memory operand without REX prefix.
+
+``Bs``
+  Sibcall memory operand.
+
+``Bw``
+  Call memory operand.
+
+``Bz``
+  Constant call address operand.
+
+``BC``
+  SSE constant -1 operand.
+
+``I``
+  Integer constant in the range 0 ... 31, for 32-bit shifts.
+
+``J``
+  Integer constant in the range 0 ... 63, for 64-bit shifts.
+
+``K``
+  Signed 8-bit integer constant.
+
+``L``
+  ``0xFF`` or ``0xFFFF``, for andsi as a zero-extending move.
+
+``M``
+  0, 1, 2, or 3 (shifts for the ``lea`` instruction).
+
+``N``
+  Unsigned 8-bit integer constant (for ``in`` and ``out``
+  instructions).
+
+.. only:: gccint
+
+  ``O``
+    Integer constant in the range 0 ... 127, for 128-bit shifts.
+
+``G``
+  Standard 80387 floating point constant.
+
+``C``
+  SSE constant zero operand.
+
+``e``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in sign-extending x86-64
+  instructions).
+
+``We``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for sign-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wz``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for zero-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wd``
+  128-bit integer constant where both the high and low 64-bit word
+  satisfy the ``e`` constraint.
+
+``Z``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in zero-extending x86-64
+  instructions).
+
+``Tv``
+  VSIB address operand.
+
+``Ts``
+  Address operand without segment register.
+
+Xstormy16---:samp:`{config/stormy16/stormy16.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register r0.
+
+``b``
+  Register r1.
+
+``c``
+  Register r2.
+
+``d``
+  Register r8.
+
+``e``
+  Registers r0 through r7.
+
+``t``
+  Registers r0 and r1.
+
+``y``
+  The carry register.
+
+``z``
+  Registers r8 and r9.
+
+``I``
+  A constant between 0 and 3 inclusive.
+
+``J``
+  A constant that has exactly one bit set.
+
+``K``
+  A constant that has exactly one bit clear.
+
+``L``
+  A constant between 0 and 255 inclusive.
+
+``M``
+  A constant between -255 and 0 inclusive.
+
+``N``
+  A constant between -3 and 0 inclusive.
+
+``O``
+  A constant between 1 and 4 inclusive.
+
+``P``
+  A constant between -4 and -1 inclusive.
+
+``Q``
+  A memory reference that is a stack push.
+
+``R``
+  A memory reference that is a stack pop.
+
+``S``
+  A memory reference that refers to a constant address of known value.
+
+``T``
+  The register indicated by Rx (not implemented yet).
+
+``U``
+  A constant that is not between 2 and 15 inclusive.
+
+``Z``
+  The constant 0.
+
+Xtensa---:samp:`{config/xtensa/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General-purpose 32-bit register
+
+``b``
+  One-bit boolean register
+
+``A``
+  MAC16 40-bit accumulator register
+
+``I``
+  Signed 12-bit integer constant, for use in MOVI instructions
+
+``J``
+  Signed 8-bit integer constant, for use in ADDI instructions
+
+``K``
+  Integer constant valid for BccI instructions
+
+``L``
+  Unsigned constant valid for BccUI instructions
\ No newline at end of file
diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 00000000000..f5558030ca8
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,3 @@
+Sphinx>=5.3
+furo
+sphinx_copybutton
diff --git a/gcc/d/doc/conf.py b/gcc/d/doc/conf.py
new file mode 100644
index 00000000000..c33f28a2f7f
--- /dev/null
+++ b/gcc/d/doc/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'gdc'
+project = 'The GNU D Compiler'
+copyright = '2006-2022 Free Software Foundation, Inc.'
+authors = 'David Friedman, Iain Buclaw'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invoking-gdc', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/d/doc/copyright.rst b/gcc/d/doc/copyright.rst
new file mode 100644
index 00000000000..5afce611a7a
--- /dev/null
+++ b/gcc/d/doc/copyright.rst
@@ -0,0 +1,13 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is in the :ref:`gnu_fdl`.
\ No newline at end of file
diff --git a/gcc/d/doc/general-public-license-3.rst b/gcc/d/doc/general-public-license-3.rst
new file mode 100644
index 00000000000..becda773ca0
--- /dev/null
+++ b/gcc/d/doc/general-public-license-3.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gpl-3.0.rst
\ No newline at end of file
diff --git a/gcc/d/doc/gnu-free-documentation-license.rst b/gcc/d/doc/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/d/doc/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/d/doc/index.rst b/gcc/d/doc/index.rst
new file mode 100644
index 00000000000..700a4a8d885
--- /dev/null
+++ b/gcc/d/doc/index.rst
@@ -0,0 +1,22 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The GNU D Compiler
+==================
+
+This manual describes how to use :command:`gdc`, the GNU compiler for
+the D programming language.  This manual is specifically about
+:command:`gdc`.  For more information about the D programming
+language in general, including language specifications and standard
+package documentation, see https://dlang.org/.
+
+.. toctree::
+
+  copyright
+  invoking-gdc
+  general-public-license-3
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/d/doc/indices-and-tables.rst b/gcc/d/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/d/doc/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc.rst b/gcc/d/doc/invoking-gdc.rst
new file mode 100644
index 00000000000..be477b82f07
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc.rst
@@ -0,0 +1,48 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _invoking-gdc:
+
+Invoking gdc
+------------
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  gdc [ :option:`-c` | :option:`-S` ] [ :option:`-g` ] [ :option:`-pg` ]
+      [ :option:`-O`:samp:`{level}` ] [ :option:`-W`:samp:`{warn}`...]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-L`:samp:`{dir}`...]
+      [ :option:`-f`:samp:`{option}`...] [ :option:`-m`:samp:`{machine-option}`...]
+      [ :option:`-o` :samp:`{outfile}` ] [@ :samp:`{file}` ] :samp:`{infile}`...
+
+  Only the most useful options are listed here; see below for the
+  remainder.
+
+Description
+^^^^^^^^^^^
+
+The :command:`gdc` command is the GNU compiler for the D language and
+supports many of the same options as :command:`gcc`.  See :ref:`gcc:option-summary`.
+This manual only documents the options specific to :command:`gdc`.
+
+Options
+^^^^^^^
+
+.. toctree::
+  :maxdepth: 2
+
+  invoking-gdc/input-and-output-files
+  invoking-gdc/runtime-options
+  invoking-gdc/options-for-directory-search
+  invoking-gdc/code-generation
+  invoking-gdc/warnings
+  invoking-gdc/options-for-linking
+  invoking-gdc/developer-options
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/code-generation.rst b/gcc/d/doc/invoking-gdc/code-generation.rst
new file mode 100644
index 00000000000..178b6f98fe2
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/code-generation.rst
@@ -0,0 +1,170 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, code generation
+
+.. _code-generation:
+
+Code Generation
+***************
+
+In addition to the many :command:`gcc` options controlling code generation,
+:command:`gdc` has several options specific to itself.
+
+.. option:: -H
+
+  .. index:: -H
+
+  Generates D interface files for all modules being compiled.  The compiler
+  determines the output file based on the name of the input file, removes
+  any directory components and suffix, and applies the :samp:`.di` suffix.
+
+.. option:: -Hd dir
+
+  .. index:: -Hd
+
+  Same as :option:`-H`, but writes interface files to directory :samp:`{dir}`.
+  This option can be used with :option:`-Hf file` to independently set the
+  output file and directory path.
+
+.. option:: -Hf file
+
+  .. index:: -Hf
+
+  Same as :option:`-H` but writes interface files to :samp:`{file}`.  This option can
+  be used with :option:`-Hd dir` to independently set the output file and
+  directory path.
+
+.. option:: -M
+
+  .. index:: -M
+
+  Output the module dependencies of all source files being compiled in a
+  format suitable for :command:`make`.  The compiler outputs one
+  :command:`make` rule containing the object file name for that source file,
+  a colon, and the names of all imported files.
+
+.. option:: -MM
+
+  .. index:: -MM
+
+  Like :option:`-M` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -MF file
+
+  .. index:: -MF
+
+  When used with :option:`-M` or :option:`-MM`, specifies a :samp:`{file}` to write
+  the dependencies to.  When used with the driver options :option:`-MD` or
+  :option:`-MMD`, :option:`-MF` overrides the default dependency output file.
+
+.. option:: -MG
+
+  .. index:: -MG
+
+  This option is for compatibility with :command:`gcc`, and is ignored by the
+  compiler.
+
+.. option:: -MP
+
+  .. index:: -MP
+
+  Outputs a phony target for each dependency other than the modules being
+  compiled, causing each to depend on nothing.
+
+.. option:: -MT target
+
+  .. index:: -MT
+
+  Change the :samp:`{target}` of the rule emitted by dependency generation
+  to be exactly the string you specify.  If you want multiple targets,
+  you can specify them as a single argument to :option:`-MT`, or use
+  multiple :option:`-MT` options.
+
+.. option:: -MQ target
+
+  .. index:: -MQ
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  :command:`make`.
+
+.. option:: -MD
+
+  .. index:: -MD
+
+  This option is equivalent to :option:`-M -MF file`.  The driver
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.deps` suffix.
+
+.. option:: -MMD
+
+  .. index:: -MMD
+
+  Like :option:`-MD` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -X
+
+  .. index:: -X
+
+  Output information describing the contents of all source files being
+  compiled in JSON format to a file.  The driver determines :samp:`{file}` by
+  removing any directory components and suffix from the input file, and then
+  adding a :samp:`.json` suffix.
+
+.. option:: -Xf file
+
+  .. index:: -Xf
+
+  Same as :option:`-X`, but writes all JSON contents to the specified
+  :samp:`{file}`.
+
+.. option:: -fdoc
+
+  .. index:: -fdoc
+
+  Generates ``Ddoc`` documentation and writes it to a file.  The compiler
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.html` suffix.
+
+.. option:: -fdoc-dir=dir
+
+  .. index:: -fdoc-dir
+
+  Same as :option:`-fdoc`, but writes documentation to directory :samp:`{dir}`.
+  This option can be used with :option:`-fdoc-file=file` to
+  independently set the output file and directory path.
+
+.. option:: -fdoc-file=file
+
+  .. index:: -fdoc-file
+
+  Same as :option:`-fdoc`, but writes documentation to :samp:`{file}`.  This
+  option can be used with :option:`-fdoc-dir=dir` to independently
+  set the output file and directory path.
+
+.. option:: -fdoc-inc=file
+
+  .. index:: -fdoc-inc
+
+  Specify :samp:`{file}` as a :samp:`{Ddoc}` macro file to be read.  Multiple
+  :option:`-fdoc-inc` options can be used, and files are read and processed
+  in the same order.
+
+.. option::  -fdump-c++-spec={file}
+
+  For D source files, generate corresponding C++ declarations in :samp:`{file}`.
+
+.. option:: -fdump-c++-spec-verbose
+
+  In conjunction with :option:`-fdump-c++-spec=` above, add comments for ignored
+  declarations in the generated C++ header.
+
+.. option:: -fsave-mixins={file}
+
+  Generates code expanded from D ``mixin`` statements and writes the
+  processed sources to :samp:`{file}`.  This is useful to debug errors in compilation
+  and provides source for debuggers to show when requested.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/developer-options.rst b/gcc/d/doc/invoking-gdc/developer-options.rst
new file mode 100644
index 00000000000..564ed36d6c0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/developer-options.rst
@@ -0,0 +1,31 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: developer options, debug dump options, dump options
+
+.. _developer-options:
+
+Developer Options
+*****************
+
+This section describes command-line options that are primarily of
+interest to developers or language tooling.
+
+.. option:: -fdump-d-original
+
+  .. index:: -fdump-d-original
+
+  Output the internal front-end AST after the ``semantic3`` stage.
+  This option is only useful for debugging the GNU D compiler itself.
+
+.. option:: -v
+
+  .. index:: -v
+
+  Dump information about the compiler language processing stages as the source
+  program is being compiled.  This includes listing all modules that are
+  processed through the ``parse``, ``semantic``, ``semantic2``, and
+  ``semantic3`` stages; all ``import`` modules and their file paths;
+  and all ``function`` bodies that are being compiled.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/input-and-output-files.rst b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
new file mode 100644
index 00000000000..a4bce6b9aba
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
@@ -0,0 +1,45 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: suffixes for D source, D source file suffixes
+
+.. _input-and-output-files:
+
+Input and Output files
+**********************
+
+For any given input file, the file name suffix determines what kind of
+compilation is done.  The following kinds of input file names are supported:
+
+:samp:`{file}.d`
+  D source files.
+
+:samp:`{file}.dd`
+  Ddoc source files.
+
+:samp:`{file}.di`
+  D interface files.
+
+You can specify more than one input file on the :command:`gdc` command line,
+each being compiled separately in the compilation process.  If you specify a
+``-o file`` option, all the input files are compiled together,
+producing a single output file, named :samp:`{file}`.  This is allowed even
+when using ``-S`` or ``-c``.
+
+.. index:: D interface files.
+
+A D interface file contains only what an import of the module needs,
+rather than the whole implementation of that module.  They can be created
+by :command:`gdc` from a D source file by using the ``-H`` option.
+When the compiler resolves an import declaration, it searches for matching
+:samp:`.di` files first, then for :samp:`.d`.
+
+.. index:: Ddoc source files.
+
+A Ddoc source file contains code in the D macro processor language.  It is
+primarily designed for use in producing user documentation from embedded
+comments, with a slight affinity towards HTML generation.  If a :samp:`.d`
+source file starts with the string ``Ddoc`` then it is treated as general
+purpose documentation, not as a D source file.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-directory-search.rst b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
new file mode 100644
index 00000000000..934b22df5b0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
@@ -0,0 +1,92 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: directory options, options, directory search, search path
+
+.. _directory-options:
+
+Options for Directory Search
+****************************
+
+These options specify directories to search for files, libraries, and
+other parts of the compiler:
+
+.. option:: -Idir
+
+  .. index:: -I
+
+  Specify a directory to use when searching for imported modules at
+  compile time.  Multiple :option:`-I` options can be used, and the
+  paths are searched in the same order.
+
+.. option:: -Jdir
+
+  .. index:: -J
+
+  Specify a directory to use when searching for files in string imports
+  at compile time.  This switch is required in order to use
+  ``import(file)`` expressions.  Multiple :option:`-J` options can be
+  used, and the paths are searched in the same order.
+
+.. option:: -Ldir
+
+  .. index:: -L
+
+  When linking, specify a library search directory, as with :command:`gcc`.
+
+.. option:: -Bdir
+
+  .. index:: -B
+
+  This option specifies where to find the executables, libraries,
+  source files, and data files of the compiler itself, as with :command:`gcc`.
+
+.. option:: -fmodule-file=module=spec
+
+  .. index:: -fmodule-file
+
+  This option manipulates file paths of imported modules, such that if an
+  imported module matches all or the leftmost part of :samp:`{module}`, the file
+  path in :samp:`{spec}` is used as the location to search for D sources.
+  This is used when the source file path and names are not the same as the
+  package and module hierarchy.  Consider the following examples:
+
+  .. code-block:: c++
+
+    gdc test.d -fmodule-file=A.B=foo.d -fmodule-file=C=bar
+
+  This will tell the compiler to search in all import paths for the source
+  file :samp:`{foo.d}` when importing :samp:`{A.B}`, and the directory :samp:`{bar/}`
+  when importing :samp:`{C}`, as annotated in the following D code:
+
+  .. code-block:: c++
+
+    module test;
+    import A.B;     // Matches A.B, searches for foo.d
+    import C.D.E;   // Matches C, searches for bar/D/E.d
+    import A.B.C;   // No match, searches for A/B/C.d
+
+.. option:: -imultilib dir
+
+  .. index:: -imultilib
+
+  Use :samp:`{dir}` as a subdirectory of the gcc directory containing
+  target-specific D sources and interfaces.
+
+.. option:: -iprefix prefix
+
+  .. index:: -iprefix
+
+  Specify :samp:`{prefix}` as the prefix for the gcc directory containing
+  target-specific D sources and interfaces.  If the :samp:`{prefix}` represents
+  a directory, you should include the final ``'/'``.
+
+.. option:: -nostdinc
+
+  .. index:: -nostdinc
+
+  Do not search the standard system directories for D source and interface
+  files.  Only the directories that have been specified with :option:`-I` options
+  (and the directory of the current file, if appropriate) are searched.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-linking.rst b/gcc/d/doc/invoking-gdc/options-for-linking.rst
new file mode 100644
index 00000000000..dc64fcd206a
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-linking.rst
@@ -0,0 +1,59 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, linking, linking, static
+
+.. _linking:
+
+Options for Linking
+*******************
+
+These options come into play when the compiler links object files into an
+executable output file.  They are meaningless if the compiler is not doing
+a link step.
+
+.. option:: -defaultlib=libname
+
+  .. index:: -defaultlib=
+
+  Specify the library to use instead of libphobos when linking.  Options
+  specifying the linkage of libphobos, such as :option:`-static-libphobos`
+  or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -debuglib=libname
+
+  .. index:: -debuglib=
+
+  Specify the debug library to use instead of libphobos when linking.
+  This option has no effect unless the :option:`-g` option was also given
+  on the command line.  Options specifying the linkage of libphobos, such
+  as :option:`-static-libphobos` or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -nophoboslib
+
+  .. index:: -nophoboslib
+
+  Do not use the Phobos or D runtime library when linking.  Options specifying
+  the linkage of libphobos, such as :option:`-static-libphobos` or
+  :option:`-shared-libphobos`, are ignored.  The standard system libraries are
+  used normally, unless :option:`-nostdlib` or :option:`-nodefaultlibs` is used.
+
+.. option:: -shared-libphobos
+
+  .. index:: -shared-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the shared
+  version.  If no shared version was built when the compiler was configured,
+  this option has no effect.
+
+.. option:: -static-libphobos
+
+  .. index:: -static-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the static
+  version.  If no static version was built when the compiler was configured,
+  this option has no effect.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/runtime-options.rst b/gcc/d/doc/invoking-gdc/runtime-options.rst
new file mode 100644
index 00000000000..fda87c2b96e
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/runtime-options.rst
@@ -0,0 +1,314 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, runtime
+
+.. _runtime-options:
+
+Runtime Options
+***************
+
+These options affect the runtime behavior of programs compiled with
+:command:`gdc`.
+
+.. option:: -fall-instantiations
+
+  .. index:: -fall-instantiations, -fno-all-instantiations
+
+  Generate code for all template instantiations.  The default template emission
+  strategy is to not generate code for declarations that were either
+  instantiated speculatively, such as from ``__traits(compiles, ...)``, or
+  that come from an imported module not being compiled.
+
+.. option:: -fno-assert
+
+  .. index:: -fassert, -fno-assert
+
+  Turn off code generation for ``assert`` contracts.
+
+.. option:: -fno-bounds-check
+
+  .. index:: -fbounds-check, -fno-bounds-check
+
+  Turns off array bounds checking for all functions, which can improve
+  performance for code that uses arrays extensively.  Note that this
+  can result in unpredictable behavior if the code in question actually
+  does violate array bounds constraints.  It is safe to use this option
+  if you are sure that your code never throws a ``RangeError``.
+
+.. option:: -fbounds-check=value
+
+  .. index:: -fbounds-check=
+
+  An alternative to :option:`-fbounds-check` that allows more control
+  as to where bounds checking is turned on or off.  The following values
+  are supported:
+
+  :samp:`on`
+    Turns on array bounds checking for all functions.
+
+  :samp:`safeonly`
+    Turns on array bounds checking only for ``@safe`` functions.
+
+  :samp:`off`
+    Turns off array bounds checking completely.
+
+.. option:: -fno-builtin
+
+  .. index:: -fbuiltin, -fno-builtin
+
+  Don't recognize built-in functions unless they begin with the prefix
+  :samp:`__builtin_`.  By default, the compiler will recognize when a
+  function in the ``core.stdc`` package is a built-in function.
+
+.. option:: -fcheckaction
+
+  This option controls what code is generated on an assertion, bounds check, or
+  final switch failure.  The following values are supported:
+
+  :samp:`context`
+    Throw an ``AssertError`` with extra context information.
+
+  :samp:`halt`
+    Halt the program execution.
+
+  :samp:`throw`
+    Throw an ``AssertError`` (the default).
+
+.. option:: -fdebug=value
+
+  .. index:: -fno-debug
+
+  Turn on compilation of conditional ``debug`` code into the program.
+  The :option:`-fdebug` option itself sets the debug level to ``1``,
+  while :option:`-fdebug=` enables ``debug`` code that are identified
+  by any of the following values:
+
+  :samp:`level`
+    Sets the debug level to :samp:`{level}`, any ``debug`` code <= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of any ``debug`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-druntime
+
+  .. index:: -fdruntime, -fno-druntime
+
+  Implements https://dlang.org/spec/betterc.html.  Assumes that
+  compilation targets an environment without a D runtime library.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -nophoboslib -fno-exceptions -fno-moduleinfo -fno-rtti
+
+.. option:: -fextern-std=standard
+
+  Sets the C++ name mangling compatibility to the version identified by
+  :samp:`{standard}`.  The following values are supported:
+
+  :samp:`c++98`, :samp:`c++03`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``199711``.
+
+  :samp:`c++11`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201103``.
+
+  :samp:`c++14`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201402``.
+
+  :samp:`c++17`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201703``.
+    This is the default.
+
+  :samp:`c++20`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``202002``.
+
+.. option:: -fno-invariants
+
+  .. index:: -finvariants, -fno-invariants
+
+  Turns off code generation for class ``invariant`` contracts.
+
+.. option:: -fmain
+
+  Generates a default ``main()`` function when compiling.  This is useful when
+  unittesting a library, as it enables running the unittests in a library without
+  having to manually define an entry-point function.  This option does nothing
+  when ``main`` is already defined in user code.
+
+.. option:: -fno-moduleinfo
+
+  Turns off generation of the ``ModuleInfo`` and related functions
+  that would become unreferenced without it, which may allow linking
+  to programs not written in D.  Functions that are not be generated
+  include module constructors and destructors (``static this`` and
+  ``static ~this``), ``unittest`` code, and ``DSO`` registry
+  functions for dynamically linked code.
+
+.. option:: -fonly=filename
+
+  .. index:: -fonly
+
+  Tells the compiler to parse and run semantic analysis on all modules
+  on the command line, but only generate code for the module specified
+  by :samp:`{filename}`.
+
+.. option:: -fno-postconditions
+
+  .. index:: -fpostconditions, -fno-postconditions
+
+  Turns off code generation for postcondition ``out`` contracts.
+
+.. option:: -fno-preconditions
+
+  .. index:: -fpreconditions, -fno-preconditions
+
+  Turns off code generation for precondition ``in`` contracts.
+
+.. option:: -fpreview=id
+
+  .. index:: -fpreview
+
+  Turns on an upcoming D language change identified by :samp:`{id}`.  The following
+  values are supported:
+
+  :samp:`all`
+    Turns on all upcoming D language features.
+
+  :samp:`dip1000`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1000.md
+    (Scoped pointers).
+
+  :samp:`dip1008`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1008.md
+    (Allow exceptions in ``@nogc`` code).
+
+  :samp:`dip1021`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/accepted/DIP1021.md
+    (Mutable function arguments).
+
+  :samp:`dip25`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns on generation for destructing fields of partially constructed objects.
+
+  :samp:`fieldwise`
+    Turns on generation of struct equality to use field-wise comparisons.
+
+  :samp:`fixaliasthis`
+    Implements new lookup rules that check the current scope for ``alias this``
+    before searching in upper scopes.
+
+  :samp:`fiximmutableconv`
+    Disallows unsound immutable conversions that were formerly incorrectly
+    permitted.
+
+  :samp:`in`
+    Implements ``in`` parameters to mean ``scope const [ref]`` and accepts
+    rvalues.
+
+  :samp:`inclusiveincontracts`
+    Implements ``in`` contracts of overridden methods to be a superset of parent
+    contract.
+
+  :samp:`intpromote`
+    Implements C-style integral promotion for unary ``+``, ``-`` and ``~``
+    expressions.
+
+  :samp:`nosharedaccess`
+    Turns off and disallows all access to shared memory objects.
+
+  :samp:`rvaluerefparam`
+    Implements rvalue arguments to ``ref`` parameters.
+
+  :samp:`systemvariables`
+    Disables access to variables marked ``@system`` from ``@safe`` code.
+
+.. option:: -frelease
+
+  .. index:: -fno-release
+
+  Turns on compiling in release mode, which means not emitting runtime
+  checks for contracts and asserts.  Array bounds checking is not done
+  for ``@system`` and ``@trusted`` functions, and assertion
+  failures are undefined behavior.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -fno-assert -fbounds-check=safe -fno-invariants \
+        -fno-postconditions -fno-preconditions -fno-switch-errors
+
+.. option:: -frevert=
+
+  .. index:: -frevert
+
+  Turns off a D language feature identified by :samp:`{id}`.  The following values
+  are supported:
+
+  :samp:`all`
+    Turns off all revertable D language features.
+
+  :samp:`dip25`
+    Reverts https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns off generation for destructing fields of partially constructed objects.
+
+  :samp:`markdown`
+    Turns off Markdown replacements in Ddoc comments.
+
+.. option:: -fno-rtti
+
+  .. index:: -frtti, -fno-rtti
+
+  Turns off generation of run-time type information for all user defined types.
+  Any code that uses features of the language that require access to this
+  information will result in an error.
+
+.. option:: -fno-switch-errors
+
+  .. index:: -fswitch-errors, -fno-switch-errors
+
+  This option controls what code is generated when no case is matched
+  in a ``final switch`` statement.  The default run time behavior
+  is to throw a ``SwitchError``.  Turning off :option:`-fswitch-errors`
+  means that instead the execution of the program is immediately halted.
+
+.. option:: -funittest
+
+  .. index:: -funittest, -fno-unittest
+
+  Turns on compilation of ``unittest`` code, and turns on the
+  ``version(unittest)`` identifier.  This implies :option:`-fassert`.
+
+.. option:: -fversion=value
+
+  .. index:: -fversion
+
+  Turns on compilation of conditional ``version`` code into the program
+  identified by any of the following values:
+
+  :samp:`level`
+    Sets the version level to :samp:`{level}`, any ``version`` code >= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of ``version`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-weak-templates
+
+  .. index:: -fweak-templates, -fno-weak-templates
+
+  Turns off emission of declarations that can be defined in multiple objects as
+  weak symbols.  The default is to emit all public symbols as weak, unless the
+  target lacks support for weak symbols.  Disabling this option means that common
+  symbols are instead put in COMDAT or become private.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/warnings.rst b/gcc/d/doc/invoking-gdc/warnings.rst
new file mode 100644
index 00000000000..c9ed52e7630
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/warnings.rst
@@ -0,0 +1,148 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options to control warnings, warning messages, messages, warning, suppressing warnings
+
+.. _warnings:
+
+Warnings
+********
+
+Warnings are diagnostic messages that report constructions that
+are not inherently erroneous but that are risky or suggest there
+is likely to be a bug in the program.  Unless :option:`-Werror` is
+specified, they do not prevent compilation of the program.
+
+.. option:: -Wall
+
+  .. index:: -Wall, -Wno-all
+
+  Turns on all warnings messages.  Warnings are not a defined part of
+  the D language, and all constructs for which this may generate a
+  warning message are valid code.
+
+.. option:: -Walloca
+
+  .. index:: -Walloca
+
+  This option warns on all uses of "alloca" in the source.
+
+.. option:: -Walloca-larger-than=n
+
+  .. index:: -Walloca-larger-than, -Wno-alloca-larger-than
+
+  Warn on unbounded uses of alloca, and on bounded uses of alloca
+  whose bound can be larger than :samp:`{n}` bytes.
+  :option:`-Wno-alloca-larger-than` disables
+  :option:`-Walloca-larger-than` warning and is equivalent to
+  :option:`-Walloca-larger-than=SIZE_MAX` or larger.
+
+.. option:: -Wcast-result
+
+  .. index:: -Wcast-result, -Wno-cast-result
+
+  Warn about casts that will produce a null or zero result.  Currently
+  this is only done for casting between an imaginary and non-imaginary
+  data type, or casting between a D and C++ class.
+
+.. option:: -Wno-deprecated
+
+  .. index:: -Wdeprecated, -Wno-deprecated
+
+  Do not warn about usage of deprecated features and symbols with
+  ``deprecated`` attributes.
+
+.. option:: -Werror
+
+  .. index:: -Werror, -Wno-error
+
+  Turns all warnings into errors.
+
+.. option:: -Wspeculative
+
+  .. index:: -Wspeculative, -Wno-speculative
+
+  List all error messages from speculative compiles, such as
+  ``__traits(compiles, ...)``.  This option does not report
+  messages as warnings, and these messages therefore never become
+  errors when the :option:`-Werror` option is also used.
+
+.. option:: -Wtemplates
+
+  .. index:: -Wtemplates, -Wno-templates
+
+  Warn when a template instantiation is encountered.  Some coding
+  rules disallow templates, and this may be used to enforce that rule.
+
+.. option:: -Wunknown-pragmas
+
+  .. index:: -Wunknown-pragmas, -Wno-unknown-pragmas
+
+  Warn when a ``pragma()`` is encountered that is not understood by
+  :command:`gdc`.  This differs from :option:`-fignore-unknown-pragmas`
+  where a pragma that is part of the D language, but not implemented by
+  the compiler, won't get reported.
+
+.. option:: -Wno-varargs
+
+  .. index:: Wvarargs, Wno-varargs
+
+  Do not warn upon questionable usage of the macros used to handle variable
+  arguments like ``va_start``.
+
+.. option:: -fignore-unknown-pragmas
+
+  .. index:: -fignore-unknown-pragmas, -fno-ignore-unknown-pragmas
+
+  Turns off errors for unsupported pragmas.
+
+.. option:: -fmax-errors=n
+
+  .. index:: -fmax-errors
+
+  Limits the maximum number of error messages to :samp:`{n}`, at which point
+  :command:`gdc` bails out rather than attempting to continue processing the
+  source code.  If :samp:`{n}` is 0 (the default), there is no limit on the
+  number of error messages produced.
+
+.. option:: -fsyntax-only
+
+  .. index:: -fsyntax-only, -fno-syntax-only
+
+  Check the code for syntax errors, but do not actually compile it.  This
+  can be used in conjunction with :option:`-fdoc` or :option:`-H` to generate
+  files for each module present on the command-line, but no other output
+  file.
+
+.. option:: -ftransition=id
+
+  .. index:: -ftransition
+
+  Report additional information about D language changes identified by
+  :samp:`{id}`.  The following values are supported:
+
+  :samp:`all`
+    List information on all D language transitions.
+
+  :samp:`complex`
+    List all usages of complex or imaginary types.
+
+  :samp:`field`
+    List all non-mutable fields which occupy an object instance.
+
+  :samp:`in`
+    List all usages of ``in`` on parameter.
+
+  :samp:`nogc`
+    List all hidden GC allocations.
+
+  :samp:`templates`
+    List statistics on template instantiations.
+
+  :samp:`tls`
+    List all variables going into thread local storage.
+
+  :samp:`vmarkdown`
+    List instances of Markdown replacements in Ddoc.
\ No newline at end of file
diff --git a/gcc/doc/cpp/character-sets.rst b/gcc/doc/cpp/character-sets.rst
new file mode 100644
index 00000000000..f4b6e05515c
--- /dev/null
+++ b/gcc/doc/cpp/character-sets.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _character-sets:
+
+Character sets
+**************
+
+Source code character set processing in C and related languages is
+rather complicated.  The C standard discusses two character sets, but
+there are really at least four.
+
+The files input to CPP might be in any character set at all.  CPP's
+very first action, before it even looks for line boundaries, is to
+convert the file into the character set it uses for internal
+processing.  That set is what the C standard calls the :dfn:`source`
+character set.  It must be isomorphic with ISO 10646, also known as
+Unicode.  CPP uses the UTF-8 encoding of Unicode.
+
+The character sets of the input files are specified using the
+:option:`-finput-charset=` option.
+
+All preprocessing work (the subject of the rest of this manual) is
+carried out in the source character set.  If you request textual
+output from the preprocessor with the :option:`-E` option, it will be
+in UTF-8.
+
+After preprocessing is complete, string and character constants are
+converted again, into the :dfn:`execution` character set.  This
+character set is under control of the user; the default is UTF-8,
+matching the source character set.  Wide string and character
+constants have their own character set, which is not called out
+specifically in the standard.  Again, it is under control of the user.
+The default is UTF-16 or UTF-32, whichever fits in the target's
+``wchar_t`` type, in the target machine's byte
+order [#f1]_.
+
+Octal and hexadecimal escape sequences do not undergo
+conversion; ``'\x12'`` has the value 0x12 regardless of the currently
+selected execution character set.  All other escapes are replaced by
+the character in the source character set that they represent, then
+converted to the execution character set, just like unescaped
+characters.
+
+In identifiers, characters outside the ASCII range can be specified
+with the :samp:`\\u` and :samp:`\\U` escapes or used directly in the input
+encoding.  If strict ISO C90 conformance is specified with an option
+such as :option:`-std=c90`, or :option:`-fno-extended-identifiers` is
+used, then those constructs are not permitted in identifiers.
+
+.. [#f1] UTF-16 does not meet the requirements of the C
+  standard for a wide character set, but the choice of 16-bit
+  ``wchar_t`` is enshrined in some system ABIs so we cannot fix
+  this.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-syntax.rst b/gcc/doc/cpp/conditional-syntax.rst
new file mode 100644
index 00000000000..1dec2ac6f4b
--- /dev/null
+++ b/gcc/doc/cpp/conditional-syntax.rst
@@ -0,0 +1,411 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #if
+
+.. _conditional-syntax:
+
+Conditional Syntax
+******************
+
+A conditional in the C preprocessor begins with a :dfn:`conditional
+directive`: :samp:`#if`, :samp:`#ifdef` or :samp:`#ifndef`.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: #ifdef, #endif
+
+.. _ifdef:
+
+Ifdef
+^^^^^
+
+The simplest sort of conditional is
+
+.. code-block:: c++
+
+  #ifdef MACRO
+
+  controlled text
+
+  #endif /* MACRO */
+
+.. index:: conditional group
+
+This block is called a :dfn:`conditional group`.  :samp:`{controlled text}`
+will be included in the output of the preprocessor if and only if
+:samp:`{MACRO}` is defined.  We say that the conditional :dfn:`succeeds` if
+:samp:`{MACRO}` is defined, :dfn:`fails` if it is not.
+
+The :samp:`{controlled text}` inside of a conditional can include
+preprocessing directives.  They are executed only if the conditional
+succeeds.  You can nest conditional groups inside other conditional
+groups, but they must be completely nested.  In other words,
+:samp:`#endif` always matches the nearest :samp:`#ifdef` (or
+:samp:`#ifndef`, or :samp:`#if`).  Also, you cannot start a conditional
+group in one file and end it in another.
+
+Even if a conditional fails, the :samp:`{controlled text}` inside it is
+still run through initial transformations and tokenization.  Therefore,
+it must all be lexically valid C.  Normally the only way this matters is
+that all comments and string literals inside a failing conditional group
+must still be properly ended.
+
+The comment following the :samp:`#endif` is not required, but it is a
+good practice if there is a lot of :samp:`{controlled text}`, because it
+helps people match the :samp:`#endif` to the corresponding :samp:`#ifdef`.
+Older programs sometimes put :samp:`{MACRO}` directly after the
+:samp:`#endif` without enclosing it in a comment.  This is invalid code
+according to the C standard.  CPP accepts it with a warning.  It
+never affects which :samp:`#ifndef` the :samp:`#endif` matches.
+
+.. index:: #ifndef
+
+Sometimes you wish to use some code if a macro is *not* defined.
+You can do this by writing :samp:`#ifndef` instead of :samp:`#ifdef`.
+One common use of :samp:`#ifndef` is to include code only the first
+time a header file is included.  See :ref:`once-only-headers`.
+
+Macro definitions can vary between compilations for several reasons.
+Here are some samples.
+
+* Some macros are predefined on each kind of machine
+  (see :ref:`system-specific-predefined-macros`).  This allows you to provide
+  code specially tuned for a particular machine.
+
+* System header files define more macros, associated with the features
+  they implement.  You can test these macros with conditionals to avoid
+  using a system feature on a machine where it is not implemented.
+
+* Macros can be defined or undefined with the :option:`-D` and :option:`-U`
+  command-line options when you compile the program.  You can arrange to
+  compile the same source file into two different programs by choosing a
+  macro name to specify which program you want, writing conditionals to
+  test whether or how this macro is defined, and then controlling the
+  state of the macro with command-line options, perhaps set in the
+  Makefile.  See :ref:`invocation`.
+
+* Your program might have a special header file (often called
+  :samp:`config.h`) that is adjusted when the program is compiled.  It can
+  define or not define macros depending on the features of the system and
+  the desired capabilities of the program.  The adjustment can be
+  automated by a tool such as :command:`autoconf`, or done by hand.
+
+.. _if:
+
+If
+^^
+
+The :samp:`#if` directive allows you to test the value of an arithmetic
+expression, rather than the mere existence of one macro.  Its syntax is
+
+.. code-block:: c++
+
+  #if expression
+
+  controlled text
+
+  #endif /* expression */
+
+:samp:`{expression}` is a C expression of integer type, subject to stringent
+restrictions.  It may contain
+
+* Integer constants.
+
+* Character constants, which are interpreted as they would be in normal
+  code.
+
+* Arithmetic operators for addition, subtraction, multiplication,
+  division, bitwise operations, shifts, comparisons, and logical
+  operations (``&&`` and ``||``).  The latter two obey the usual
+  short-circuiting rules of standard C.
+
+* Macros.  All macros in the expression are expanded before actual
+  computation of the expression's value begins.
+
+* Uses of the ``defined`` operator, which lets you check whether macros
+  are defined in the middle of an :samp:`#if`.
+
+* Identifiers that are not macros, which are all considered to be the
+  number zero.  This allows you to write ``#if MACRO`` instead of
+  ``#ifdef MACRO``, if you know that MACRO, when defined, will
+  always have a nonzero value.  Function-like macros used without their
+  function call parentheses are also treated as zero.
+
+  In some contexts this shortcut is undesirable.  The :option:`-Wundef`
+  option causes GCC to warn whenever it encounters an identifier which is
+  not a macro in an :samp:`#if`.
+
+The preprocessor does not know anything about types in the language.
+Therefore, ``sizeof`` operators are not recognized in :samp:`#if`, and
+neither are ``enum`` constants.  They will be taken as identifiers
+which are not macros, and replaced by zero.  In the case of
+``sizeof``, this is likely to cause the expression to be invalid.
+
+The preprocessor calculates the value of :samp:`{expression}`.  It carries
+out all calculations in the widest integer type known to the compiler;
+on most machines supported by GCC this is 64 bits.  This is not the same
+rule as the compiler uses to calculate the value of a constant
+expression, and may give different results in some cases.  If the value
+comes out to be nonzero, the :samp:`#if` succeeds and the :samp:`{controlled
+text}` is included; otherwise it is skipped.
+
+.. index:: defined
+
+.. _defined:
+
+Defined
+^^^^^^^
+
+The special operator ``defined`` is used in :samp:`#if` and
+:samp:`#elif` expressions to test whether a certain name is defined as a
+macro.  ``defined name`` and ``defined (name)`` are
+both expressions whose value is 1 if :samp:`{name}` is defined as a macro at
+the current point in the program, and 0 otherwise.  Thus,  ``#if
+defined MACRO`` is precisely equivalent to ``#ifdef MACRO``.
+
+``defined`` is useful when you wish to test more than one macro for
+existence at once.  For example,
+
+.. code-block:: c++
+
+  #if defined (__vax__) || defined (__ns16000__)
+
+would succeed if either of the names ``__vax__`` or
+``__ns16000__`` is defined as a macro.
+
+Conditionals written like this:
+
+.. code-block:: c++
+
+  #if defined BUFSIZE && BUFSIZE >= 1024
+
+can generally be simplified to just ``#if BUFSIZE >= 1024``,
+since if ``BUFSIZE`` is not defined, it will be interpreted as having
+the value zero.
+
+If the ``defined`` operator appears as a result of a macro expansion,
+the C standard says the behavior is undefined.  GNU cpp treats it as a
+genuine ``defined`` operator and evaluates it normally.  It will warn
+wherever your code uses this feature if you use the command-line option
+:option:`-Wpedantic`, since other compilers may handle it differently.  The
+warning is also enabled by :option:`-Wextra`, and can also be enabled
+individually with :option:`-Wexpansion-to-defined`.
+
+.. index:: #else
+
+.. _else:
+
+Else
+^^^^
+
+The :samp:`#else` directive can be added to a conditional to provide
+alternative text to be used if the condition fails.  This is what it
+looks like:
+
+.. code-block:: c++
+
+  #if expression
+  text-if-true
+  #else /* Not expression */
+  text-if-false
+  #endif /* Not expression */
+
+If :samp:`{expression}` is nonzero, the :samp:`{text-if-true}` is included and
+the :samp:`{text-if-false}` is skipped.  If :samp:`{expression}` is zero, the
+opposite happens.
+
+You can use :samp:`#else` with :samp:`#ifdef` and :samp:`#ifndef`, too.
+
+.. index:: #elif
+
+.. _elif:
+
+Elif
+^^^^
+
+One common case of nested conditionals is used to check for more than two
+possible alternatives.  For example, you might have
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #else /* X != 1 */
+  #if X == 2
+  ...
+  #else /* X != 2 */
+  ...
+  #endif /* X != 2 */
+  #endif /* X != 1 */
+
+Another conditional directive, :samp:`#elif`, allows this to be
+abbreviated as follows:
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #elif X == 2
+  ...
+  #else /* X != 2 and X != 1*/
+  ...
+  #endif /* X != 2 and X != 1*/
+
+:samp:`#elif` stands for 'else if'.  Like :samp:`#else`, it goes in the
+middle of a conditional group and subdivides it; it does not require a
+matching :samp:`#endif` of its own.  Like :samp:`#if`, the :samp:`#elif`
+directive includes an expression to be tested.  The text following the
+:samp:`#elif` is processed only if the original :samp:`#if`-condition
+failed and the :samp:`#elif` condition succeeds.
+
+More than one :samp:`#elif` can go in the same conditional group.  Then
+the text after each :samp:`#elif` is processed only if the :samp:`#elif`
+condition succeeds after the original :samp:`#if` and all previous
+:samp:`#elif` directives within it have failed.
+
+:samp:`#else` is allowed after any number of :samp:`#elif` directives, but
+:samp:`#elif` may not follow :samp:`#else`.
+
+.. index:: __has_attribute
+
+__has_attribute
+^^^^^^^^^^^^^^^
+
+The special operator ``__has_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions to test whether the attribute
+referenced by its :samp:`{operand}` is recognized by GCC.  Using the operator
+in other contexts is not valid.  In C code, if compiling for strict
+conformance to standards before C2x, :samp:`{operand}` must be
+a valid identifier.  Otherwise, :samp:`{operand}` may be optionally
+introduced by the ``attribute-scope::`` prefix.
+The :samp:`{attribute-scope}` prefix identifies the 'namespace' within
+which the attribute is recognized.  The scope of GCC attributes is
+:samp:`gnu` or :samp:`__gnu__`.  The ``__has_attribute`` operator by
+itself, without any :samp:`{operand}` or parentheses, acts as a predefined
+macro so that support for it can be tested in portable code.  Thus,
+the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_attribute
+  #  if __has_attribute (nonnull)
+  #    define ATTR_NONNULL __attribute__ ((nonnull))
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_attribute`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression as
+shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_attribute && __has_attribute (nonnull)   /* not portable */
+  ...
+  #endif
+
+.. index:: __has_cpp_attribute
+
+__has_cpp_attribute
+^^^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_cpp_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions in C++ code to test whether
+the attribute referenced by its :samp:`{operand}` is recognized by GCC.
+``__has_cpp_attribute (operand)`` is equivalent to
+``__has_attribute (operand)`` except that when :samp:`{operand}`
+designates a supported standard attribute it evaluates to an integer
+constant of the form ``YYYYMM`` indicating the year and month when
+the attribute was first introduced into the C++ standard.  For additional
+information including the dates of the introduction of current standard
+attributes, see `SD-6: SG10 Feature Test Recommendations <https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations/>`_.
+
+.. index:: __has_c_attribute
+
+__has_c_attribute
+^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_c_attribute (operand)`` may be
+used in :samp:`#if` and :samp:`#elif` expressions in C code to test
+whether the attribute referenced by its :samp:`{operand}` is recognized by
+GCC in attributes using the :samp:`[[]]` syntax.  GNU attributes must
+be specified with the scope :samp:`gnu` or :samp:`__gnu__` with
+``__has_c_attribute``.  When :samp:`{operand}` designates a supported
+standard attribute it evaluates to an integer constant of the form
+``YYYYMM`` indicating the year and month when the attribute was
+first introduced into the C standard, or when the syntax of operands
+to the attribute was extended in the C standard.
+
+.. index:: __has_builtin
+
+__has_builtin
+^^^^^^^^^^^^^
+
+The special operator ``__has_builtin (operand)`` may be used in
+constant integer contexts and in preprocessor :samp:`#if` and :samp:`#elif`
+expressions to test whether the symbol named by its :samp:`{operand}` is
+recognized as a built-in function by GCC in the current language and
+conformance mode.  It evaluates to a constant integer with a nonzero
+value if the argument refers to such a function, and to zero otherwise.
+The operator may also be used in preprocessor :samp:`#if` and :samp:`#elif`
+expressions.  The ``__has_builtin`` operator by itself, without any
+:samp:`{operand}` or parentheses, acts as a predefined macro so that support
+for it can be tested in portable code.  Thus, the recommended use of
+the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_builtin
+  #  if __has_builtin (__builtin_object_size)
+  #    define builtin_object_size(ptr) __builtin_object_size (ptr, 2)
+  #  endif
+  #endif
+  #ifndef builtin_object_size
+  #  define builtin_object_size(ptr)   ((size_t)-1)
+  #endif
+
+.. index:: __has_include
+
+__has_include
+^^^^^^^^^^^^^
+
+The special operator ``__has_include (operand)`` may be used in
+:samp:`#if` and :samp:`#elif` expressions to test whether the header referenced
+by its :samp:`{operand}` can be included using the :samp:`#include` directive.  Using
+the operator in other contexts is not valid.  The :samp:`{operand}` takes
+the same form as the file in the :samp:`#include` directive (see :ref:`include-syntax`) and evaluates to a nonzero value if the header can be included and
+to zero otherwise.  Note that that the ability to include a header doesn't
+imply that the header doesn't contain invalid constructs or :samp:`#error`
+directives that would cause the preprocessor to fail.
+
+The ``__has_include`` operator by itself, without any :samp:`{operand}` or
+parentheses, acts as a predefined macro so that support for it can be tested
+in portable code.  Thus, the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_include
+  #  if __has_include (<stdatomic.h>)
+  #    include <stdatomic.h>
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_include`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression
+as shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_include && __has_include ("header.h")   /* not portable */
+  ...
+  #endif
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-uses.rst b/gcc/doc/cpp/conditional-uses.rst
new file mode 100644
index 00000000000..59555a5828d
--- /dev/null
+++ b/gcc/doc/cpp/conditional-uses.rst
@@ -0,0 +1,32 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _conditional-uses:
+
+Conditional Uses
+****************
+
+There are three general reasons to use a conditional.
+
+* A program may need to use different code depending on the machine or
+  operating system it is to run on.  In some cases the code for one
+  operating system may be erroneous on another operating system; for
+  example, it might refer to data types or constants that do not exist on
+  the other system.  When this happens, it is not enough to avoid
+  executing the invalid code.  Its mere presence will cause the compiler
+  to reject the program.  With a preprocessing conditional, the offending
+  code can be effectively excised from the program when it is not valid.
+
+* You may want to be able to compile the same source file into two
+  different programs.  One version might make frequent time-consuming
+  consistency checks on its intermediate data, or print the values of
+  those data for debugging, and the other not.
+
+* A conditional whose condition is always false is one way to exclude code
+  from the program but keep it as a sort of comment for future reference.
+
+Simple programs that do not need system-specific logic or complex
+debugging hooks generally will not need to use preprocessing
+conditionals.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditionals.rst b/gcc/doc/cpp/conditionals.rst
new file mode 100644
index 00000000000..381a6124da4
--- /dev/null
+++ b/gcc/doc/cpp/conditionals.rst
@@ -0,0 +1,44 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: conditionals
+
+.. _conditionals:
+
+Conditionals
+------------
+
+A :dfn:`conditional` is a directive that instructs the preprocessor to
+select whether or not to include a chunk of code in the final token
+stream passed to the compiler.  Preprocessor conditionals can test
+arithmetic expressions, or whether a name is defined as a macro, or both
+simultaneously using the special ``defined`` operator.
+
+A conditional in the C preprocessor resembles in some ways an ``if``
+statement in C, but it is important to understand the difference between
+them.  The condition in an ``if`` statement is tested during the
+execution of your program.  Its purpose is to allow your program to
+behave differently from run to run, depending on the data it is
+operating on.  The condition in a preprocessing conditional directive is
+tested when your program is compiled.  Its purpose is to allow different
+code to be included in the program depending on the situation at the
+time of compilation.
+
+However, the distinction is becoming less clear.  Modern compilers often
+do test ``if`` statements when a program is compiled, if their
+conditions are known not to vary at run time, and eliminate code which
+can never be executed.  If you can count on your compiler to do this,
+you may find that your program is more readable if you use ``if``
+statements with constant conditions (perhaps determined by macros).  Of
+course, you can only use this to exclude code, not type definitions or
+other preprocessing directives, and you can only do it if the code
+remains syntactically valid when it is not to be used.
+
+.. toctree::
+  :maxdepth: 2
+
+  conditional-uses
+  conditional-syntax
+  deleted-code
\ No newline at end of file
diff --git a/gcc/doc/cpp/conf.py b/gcc/doc/cpp/conf.py
new file mode 100644
index 00000000000..29d3aed4558
--- /dev/null
+++ b/gcc/doc/cpp/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'cpp'
+project = 'The C Preprocessor'
+copyright = '1987-2022 Free Software Foundation, Inc.'
+authors = 'Richard M. Stallman, Zachary Weinberg'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invocation', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/doc/cpp/copyright.rst b/gcc/doc/cpp/copyright.rst
new file mode 100644
index 00000000000..fa61190ddf7
--- /dev/null
+++ b/gcc/doc/cpp/copyright.rst
@@ -0,0 +1,24 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, the Front-Cover Texts being (a) (see below), and
+with the Back-Cover Texts being (b) (see below).
+A copy of the license is included in the :ref:`gnu_fdl`.
+
+(a) The FSF's Front-Cover Text is:
+
+     A GNU Manual
+
+(b) The FSF's Back-Cover Text is:
+
+     You have freedom to copy and modify this GNU Manual, like GNU
+     software.  Copies published by the Free Software Foundation raise
+     funds for GNU development.
\ No newline at end of file
diff --git a/gcc/doc/cpp/deleted-code.rst b/gcc/doc/cpp/deleted-code.rst
new file mode 100644
index 00000000000..758e0c1c0a3
--- /dev/null
+++ b/gcc/doc/cpp/deleted-code.rst
@@ -0,0 +1,34 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: commenting out code
+
+.. _deleted-code:
+
+Deleted Code
+************
+
+If you replace or delete a part of the program but want to keep the old
+code around for future reference, you often cannot simply comment it
+out.  Block comments do not nest, so the first comment inside the old
+code will end the commenting-out.  The probable result is a flood of
+syntax errors.
+
+One way to avoid this problem is to use an always-false conditional
+instead.  For instance, put ``#if 0`` before the deleted code and
+``#endif`` after it.  This works even if the code being turned
+off contains conditionals, but they must be entire conditionals
+(balanced :samp:`#if` and :samp:`#endif`).
+
+Some people use ``#ifdef notdef`` instead.  This is risky, because
+``notdef`` might be accidentally defined as a macro, and then the
+conditional would succeed.  ``#if 0`` can be counted on to fail.
+
+Do not use ``#if 0`` for comments which are not C code.  Use a real
+comment, instead.  The interior of ``#if 0`` must consist of complete
+tokens; in particular, single-quote characters must balance.  Comments
+often contain unbalanced single-quote characters (known in English as
+apostrophes).  These confuse ``#if 0``.  They don't confuse
+:samp:`/*`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/diagnostics.rst b/gcc/doc/cpp/diagnostics.rst
new file mode 100644
index 00000000000..beaad7d8217
--- /dev/null
+++ b/gcc/doc/cpp/diagnostics.rst
@@ -0,0 +1,51 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: diagnostic, reporting errors, reporting warnings, #error
+
+.. _diagnostics:
+
+Diagnostics
+-----------
+
+The directive :samp:`#error` causes the preprocessor to report a fatal
+error.  The tokens forming the rest of the line following :samp:`#error`
+are used as the error message.
+
+You would use :samp:`#error` inside of a conditional that detects a
+combination of parameters which you know the program does not properly
+support.  For example, if you know that the program will not run
+properly on a VAX, you might write
+
+.. code-block:: c++
+
+  #ifdef __vax__
+  #error "Won't work on VAXen.  See comments at get_last_object."
+  #endif
+
+If you have several configuration parameters that must be set up by
+the installation in a consistent way, you can use conditionals to detect
+an inconsistency and report it with :samp:`#error`.  For example,
+
+.. code-block:: c++
+
+  #if !defined(FOO) && defined(BAR)
+  #error "BAR requires FOO."
+  #endif
+
+.. index:: #warning
+
+The directive :samp:`#warning` is like :samp:`#error`, but causes the
+preprocessor to issue a warning and continue preprocessing.  The tokens
+following :samp:`#warning` are used as the warning message.
+
+You might use :samp:`#warning` in obsolete header files, with a message
+directing the user to the header file which should be used instead.
+
+Neither :samp:`#error` nor :samp:`#warning` macro-expands its argument.
+Internal whitespace sequences are each replaced with a single space.
+The line must consist of complete tokens.  It is wisest to make the
+argument of these directives be a single string constant; this avoids
+problems with apostrophes and the like.
\ No newline at end of file
diff --git a/gcc/doc/cpp/environment-variables.rst b/gcc/doc/cpp/environment-variables.rst
new file mode 100644
index 00000000000..c0ab7992905
--- /dev/null
+++ b/gcc/doc/cpp/environment-variables.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: environment variables
+
+.. _environment-variables:
+
+Environment Variables
+---------------------
+
+This section describes the environment variables that affect how CPP
+operates.  You can use them to specify directories or prefixes to use
+when searching for include files, or to control dependency output.
+
+Note that you can also specify places to search using options such as
+:option:`-I`, and control dependency output with options like
+:option:`-M` (see :ref:`invocation`).  These take precedence over
+environment variables, which in turn take precedence over the
+configuration of GCC.
+
+.. include:: ../../../doc/cppenv.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/gnu-free-documentation-license.rst b/gcc/doc/cpp/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/doc/cpp/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files.rst b/gcc/doc/cpp/header-files.rst
new file mode 100644
index 00000000000..13b9841c3c6
--- /dev/null
+++ b/gcc/doc/cpp/header-files.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: header file
+
+.. _header-files:
+
+Header Files
+------------
+
+A header file is a file containing C declarations and macro definitions
+(see :ref:`macros`) to be shared between several source files.  You request
+the use of a header file in your program by :dfn:`including` it, with the
+C preprocessing directive :samp:`#include`.
+
+Header files serve two purposes.
+
+.. index:: system header files
+
+* System header files declare the interfaces to parts of the operating
+  system.  You include them in your program to supply the definitions and
+  declarations you need to invoke system calls and libraries.
+
+* Your own header files contain declarations for interfaces between the
+  source files of your program.  Each time you have a group of related
+  declarations and macro definitions all or most of which are needed in
+  several different source files, it is a good idea to create a header
+  file for them.
+
+Including a header file produces the same results as copying the header
+file into each source file that needs it.  Such copying would be
+time-consuming and error-prone.  With a header file, the related
+declarations appear in only one place.  If they need to be changed, they
+can be changed in one place, and programs that include the header file
+will automatically use the new version when next recompiled.  The header
+file eliminates the labor of finding and changing all the copies as well
+as the risk that a failure to find one copy will result in
+inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with
+:samp:`.h`.  It is most portable to use only letters, digits, dashes, and
+underscores in header file names, and at most one dot.
+
+.. toctree::
+  :maxdepth: 2
+
+  header-files/include-syntax
+  header-files/include-operation
+  header-files/search-path
+  header-files/once-only-headers
+  header-files/alternatives-to-wrapper-ifndef
+  header-files/computed-includes
+  header-files/wrapper-headers
+  header-files/system-headers
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
new file mode 100644
index 00000000000..e38cffeaf38
--- /dev/null
+++ b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
@@ -0,0 +1,40 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _alternatives-to-wrapper-ifndef:
+
+Alternatives to Wrapper #ifndef
+*******************************
+
+CPP supports two more ways of indicating that a header file should be
+read only once.  Neither one is as portable as a wrapper :samp:`#ifndef`
+and we recommend you do not use them in new programs, with the caveat
+that :samp:`#import` is standard practice in Objective-C.
+
+.. index:: #import
+
+CPP supports a variant of :samp:`#include` called :samp:`#import` which
+includes a file, but does so at most once.  If you use :samp:`#import`
+instead of :samp:`#include`, then you don't need the conditionals
+inside the header file to prevent multiple inclusion of the contents.
+:samp:`#import` is standard in Objective-C, but is considered a
+deprecated extension in C and C++.
+
+:samp:`#import` is not a well designed feature.  It requires the users of
+a header file to know that it should only be included once.  It is much
+better for the header file's implementor to write the file so that users
+don't need to know this.  Using a wrapper :samp:`#ifndef` accomplishes
+this goal.
+
+In the present implementation, a single use of :samp:`#import` will
+prevent the file from ever being read again, by either :samp:`#import` or
+:samp:`#include`.  You should not rely on this; do not use both
+:samp:`#import` and :samp:`#include` to refer to the same header file.
+
+Another way to prevent a header file from being included more than once
+is with the :samp:`#pragma once` directive (see :ref:`pragmas`).
+:samp:`#pragma once` does not have the problems that :samp:`#import` does,
+but it is not recognized by all preprocessors, so you cannot rely on it
+in a portable program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/computed-includes.rst b/gcc/doc/cpp/header-files/computed-includes.rst
new file mode 100644
index 00000000000..49c16228032
--- /dev/null
+++ b/gcc/doc/cpp/header-files/computed-includes.rst
@@ -0,0 +1,86 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: computed includes, macros in include
+
+.. _computed-includes:
+
+Computed Includes
+*****************
+
+Sometimes it is necessary to select one of several different header
+files to be included into your program.  They might specify
+configuration parameters to be used on different sorts of operating
+systems, for instance.  You could do this with a series of conditionals,
+
+.. code-block:: c++
+
+  #if SYSTEM_1
+  # include "system_1.h"
+  #elif SYSTEM_2
+  # include "system_2.h"
+  #elif SYSTEM_3
+  ...
+  #endif
+
+That rapidly becomes tedious.  Instead, the preprocessor offers the
+ability to use a macro for the header name.  This is called a
+:dfn:`computed include`.  Instead of writing a header name as the direct
+argument of :samp:`#include`, you simply put a macro name there instead:
+
+.. code-block:: c++
+
+  #define SYSTEM_H "system_1.h"
+  ...
+  #include SYSTEM_H
+
+``SYSTEM_H`` will be expanded, and the preprocessor will look for
+:samp:`system_1.h` as if the :samp:`#include` had been written that way
+originally.  ``SYSTEM_H`` could be defined by your Makefile with a
+:option:`-D` option.
+
+You must be careful when you define the macro.  :samp:`#define` saves
+tokens, not text.  The preprocessor has no way of knowing that the macro
+will be used as the argument of :samp:`#include`, so it generates
+ordinary tokens, not a header name.  This is unlikely to cause problems
+if you use double-quote includes, which are close enough to string
+constants.  If you use angle brackets, however, you may have trouble.
+
+The syntax of a computed include is actually a bit more general than the
+above.  If the first non-whitespace character after :samp:`#include` is
+not :samp:`"` or :samp:`<`, then the entire line is macro-expanded
+like running text would be.
+
+If the line expands to a single string constant, the contents of that
+string constant are the file to be included.  CPP does not re-examine the
+string for embedded quotes, but neither does it process backslash
+escapes in the string.  Therefore
+
+.. code-block:: c++
+
+  #define HEADER "a\"b"
+  #include HEADER
+
+looks for a file named :samp:`a\\"b`.  CPP searches for the file according
+to the rules for double-quoted includes.
+
+If the line expands to a token stream beginning with a :samp:`<` token
+and including a :samp:`>` token, then the tokens between the :samp:`<` and
+the first :samp:`>` are combined to form the filename to be included.
+Any whitespace between tokens is reduced to a single space; then any
+space after the initial :samp:`<` is retained, but a trailing space
+before the closing :samp:`>` is ignored.  CPP searches for the file
+according to the rules for angle-bracket includes.
+
+In either case, if there are any tokens on the line after the file name,
+an error occurs and the directive is not processed.  It is also an error
+if the result of expansion does not match either of the two expected
+forms.
+
+These rules are implementation-defined behavior according to the C
+standard.  To minimize the risk of different compilers interpreting your
+computed includes differently, we recommend you use only a single
+object-like macro which expands to a string constant.  This will also
+minimize confusion for people reading your program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-operation.rst b/gcc/doc/cpp/header-files/include-operation.rst
new file mode 100644
index 00000000000..465905698e7
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-operation.rst
@@ -0,0 +1,67 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _include-operation:
+
+Include Operation
+*****************
+
+The :samp:`#include` directive works by directing the C preprocessor to
+scan the specified file as input before continuing with the rest of the
+current file.  The output from the preprocessor contains the output
+already generated, followed by the output resulting from the included
+file, followed by the output that comes from the text after the
+:samp:`#include` directive.  For example, if you have a header file
+:samp:`header.h` as follows,
+
+.. code-block:: c++
+
+  char *test (void);
+
+and a main program called :samp:`program.c` that uses the header file,
+like this,
+
+.. code-block:: c++
+
+  int x;
+  #include "header.h"
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+the compiler will see the same token stream as it would if
+:samp:`program.c` read
+
+.. code-block:: c++
+
+  int x;
+  char *test (void);
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+Included files are not limited to declarations and macro definitions;
+those are merely the typical uses.  Any fragment of a C program can be
+included from another file.  The include file could even contain the
+beginning of a statement that is concluded in the containing file, or
+the end of a statement that was started in the including file.  However,
+an included file must consist of complete tokens.  Comments and string
+literals which have not been closed by the end of an included file are
+invalid.  For error recovery, they are considered to end at the end of
+the file.
+
+To avoid confusion, it is best if header files contain only complete
+syntactic units---function declarations or definitions, type
+declarations, etc.
+
+The line following the :samp:`#include` directive is always treated as a
+separate line by the C preprocessor, even if the included file lacks a
+final newline.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-syntax.rst b/gcc/doc/cpp/header-files/include-syntax.rst
new file mode 100644
index 00000000000..a378dfc5375
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-syntax.rst
@@ -0,0 +1,42 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #include
+
+.. _include-syntax:
+
+Include Syntax
+**************
+
+Both user and system header files are included using the preprocessing
+directive :samp:`#include`.  It has two variants:
+
+:samp:`#include <{file}>`
+  This variant is used for system header files.  It searches for a file
+  named :samp:`{file}` in a standard list of system directories.  You can prepend
+  directories to this list with the :option:`-I` option (see :ref:`invocation`).
+
+:samp:`#include "{file}"`
+  This variant is used for header files of your own program.  It
+  searches for a file named :samp:`{file}` first in the directory containing
+  the current file, then in the quote directories and then the same
+  directories used for ``<file>``.  You can prepend directories
+  to the list of quote directories with the :option:`-iquote` option.
+
+The argument of :samp:`#include`, whether delimited with quote marks or
+angle brackets, behaves like a string constant in that comments are not
+recognized, and macro names are not expanded.  Thus, ``#include
+<x/*y>`` specifies inclusion of a system header file named :samp:`x/*y`.
+
+However, if backslashes occur within :samp:`{file}`, they are considered
+ordinary text characters, not escape characters.  None of the character
+escape sequences appropriate to string constants in C are processed.
+Thus, ``#include "x\n\\y"`` specifies a filename containing three
+backslashes.  (Some systems interpret :samp:`\\` as a pathname separator.
+All of these also interpret :samp:`/` the same way.  It is most portable
+to use only :samp:`/`.)
+
+It is an error if there is anything (other than comments) on the line
+after the file name.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/once-only-headers.rst b/gcc/doc/cpp/header-files/once-only-headers.rst
new file mode 100644
index 00000000000..2ee77771620
--- /dev/null
+++ b/gcc/doc/cpp/header-files/once-only-headers.rst
@@ -0,0 +1,52 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: repeated inclusion, including just once, wrapper #ifndef
+
+.. _once-only-headers:
+
+Once-Only Headers
+*****************
+
+If a header file happens to be included twice, the compiler will process
+its contents twice.  This is very likely to cause an error, e.g. when the
+compiler sees the same structure definition twice.  Even if it does not,
+it will certainly waste time.
+
+The standard way to prevent this is to enclose the entire real contents
+of the file in a conditional, like this:
+
+.. code-block:: c++
+
+  /* File foo.  */
+  #ifndef FILE_FOO_SEEN
+  #define FILE_FOO_SEEN
+
+  the entire file
+
+  #endif /* !FILE_FOO_SEEN */
+
+This construct is commonly known as a :dfn:`wrapper #ifndef`.
+When the header is included again, the conditional will be false,
+because ``FILE_FOO_SEEN`` is defined.  The preprocessor will skip
+over the entire contents of the file, and the compiler will not see it
+twice.
+
+CPP optimizes even further.  It remembers when a header file has a
+wrapper :samp:`#ifndef`.  If a subsequent :samp:`#include` specifies that
+header, and the macro in the :samp:`#ifndef` is still defined, it does
+not bother to rescan the file at all.
+
+You can put comments outside the wrapper.  They will not interfere with
+this optimization.
+
+.. index:: controlling macro, guard macro
+
+The macro ``FILE_FOO_SEEN`` is called the :dfn:`controlling macro` or
+:dfn:`guard macro`.  In a user header file, the macro name should not
+begin with :samp:`_`.  In a system header file, it should begin with
+:samp:`__` to avoid conflicts with user programs.  In any kind of header
+file, the macro name should contain the name of the file and some
+additional text, to avoid conflicts with other header files.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/search-path.rst b/gcc/doc/cpp/header-files/search-path.rst
new file mode 100644
index 00000000000..9f87878517f
--- /dev/null
+++ b/gcc/doc/cpp/header-files/search-path.rst
@@ -0,0 +1,53 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _search-path:
+
+Search Path
+***********
+
+By default, the preprocessor looks for header files included by the quote
+form of the directive ``#include "file"`` first relative to
+the directory of the current file, and then in a preconfigured list
+of standard system directories.
+For example, if :samp:`/usr/include/sys/stat.h` contains
+``#include "types.h"``, GCC looks for :samp:`types.h` first in
+:samp:`/usr/include/sys`, then in its usual search path.
+
+For the angle-bracket form ``#include <file>``, the
+preprocessor's default behavior is to look only in the standard system
+directories.  The exact search directory list depends on the target
+system, how GCC is configured, and where it is installed.  You can
+find the default search directory list for your version of CPP by
+invoking it with the :option:`-v` option.  For example,
+
+.. code-block:: c++
+
+  cpp -v /dev/null -o /dev/null
+
+There are a number of command-line options you can use to add
+additional directories to the search path.
+The most commonly-used option is :option:`-Idir`, which causes
+:samp:`{dir}` to be searched after the current directory (for the quote
+form of the directive) and ahead of the standard system directories.
+You can specify multiple :option:`-I` options on the command line,
+in which case the directories are searched in left-to-right order.
+
+If you need separate control over the search paths for the quote and
+angle-bracket forms of the :samp:`#include` directive, you can use the
+:option:`-iquote` and/or :option:`-isystem` options instead of :option:`-I`.
+See :ref:`invocation`, for a detailed description of these options, as
+well as others that are less generally useful.
+
+If you specify other options on the command line, such as :option:`-I`,
+that affect where the preprocessor searches for header files, the
+directory list printed by the :option:`-v` option reflects the actual
+search path used by the preprocessor.
+
+Note that you can also prevent the preprocessor from searching any of
+the default system header directories with the :option:`-nostdinc`
+option.  This is useful when you are compiling an operating system
+kernel or some other program that does not use the standard C library
+facilities, or the standard C library itself.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/system-headers.rst b/gcc/doc/cpp/header-files/system-headers.rst
new file mode 100644
index 00000000000..ef6474f9dea
--- /dev/null
+++ b/gcc/doc/cpp/header-files/system-headers.rst
@@ -0,0 +1,41 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: system header files
+
+.. _system-headers:
+
+System Headers
+**************
+
+The header files declaring interfaces to the operating system and
+runtime libraries often cannot be written in strictly conforming C.
+Therefore, GCC gives code found in :dfn:`system headers` special
+treatment.  All warnings, other than those generated by :samp:`#warning`
+(see :ref:`diagnostics`), are suppressed while GCC is processing a system
+header.  Macros defined in a system header are immune to a few warnings
+wherever they are expanded.  This immunity is granted on an ad-hoc
+basis, when we find that a warning generates lots of false positives
+because of code in macros defined in system headers.
+
+Normally, only the headers found in specific directories are considered
+system headers.  These directories are determined when GCC is compiled.
+There are, however, two ways to make normal headers into system headers:
+
+* Header files found in directories added to the search path with the
+  :option:`-isystem` and :option:`-idirafter` command-line options are
+  treated as system headers for the purposes of diagnostics.
+
+*
+  .. index:: #pragma GCC system_header
+
+  There is also a directive, ``#pragma GCC system_header``, which
+  tells GCC to consider the rest of the current include file a system
+  header, no matter where it was found.  Code that comes before the
+  :samp:`#pragma` in the file is not affected.  ``#pragma GCC
+  system_header`` has no effect in the primary source file.
+
+On some targets, such as RS/6000 AIX, GCC implicitly surrounds all
+system headers with an :samp:`extern "C"` block when compiling as C++.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/wrapper-headers.rst b/gcc/doc/cpp/header-files/wrapper-headers.rst
new file mode 100644
index 00000000000..848170e138e
--- /dev/null
+++ b/gcc/doc/cpp/header-files/wrapper-headers.rst
@@ -0,0 +1,58 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: wrapper headers, overriding a header file, #include_next
+
+.. _wrapper-headers:
+
+Wrapper Headers
+***************
+
+Sometimes it is necessary to adjust the contents of a system-provided
+header file without editing it directly.  GCC's :command:`fixincludes`
+operation does this, for example.  One way to do that would be to create
+a new header file with the same name and insert it in the search path
+before the original header.  That works fine as long as you're willing
+to replace the old header entirely.  But what if you want to refer to
+the old header from the new one?
+
+You cannot simply include the old header with :samp:`#include`.  That
+will start from the beginning, and find your new header again.  If your
+header is not protected from multiple inclusion (see :ref:`once-only-headers`), it will recurse infinitely and cause a fatal error.
+
+You could include the old header with an absolute pathname:
+
+.. code-block:: c++
+
+  #include "/usr/include/old-header.h"
+
+This works, but is not clean; should the system headers ever move, you
+would have to edit the new headers to match.
+
+There is no way to solve this problem within the C standard, but you can
+use the GNU extension :samp:`#include_next`.  It means, 'Include the
+*next* file with this name'.  This directive works like
+:samp:`#include` except in searching for the specified file: it starts
+searching the list of header file directories *after* the directory
+in which the current file was found.
+
+Suppose you specify :option:`-I /usr/local/include`, and the list of
+directories to search also includes :samp:`/usr/include`; and suppose
+both directories contain :samp:`signal.h`.  Ordinary ``#include
+<signal.h>`` finds the file under :samp:`/usr/local/include`.  If that
+file contains ``#include_next <signal.h>``, it starts searching
+after that directory, and finds the file in :samp:`/usr/include`.
+
+:samp:`#include_next` does not distinguish between ``<file>``
+and ``"file"`` inclusion, nor does it check that the file you
+specify has the same name as the current file.  It simply looks for the
+file named, starting with the directory in the search path after the one
+where the current file was found.
+
+The use of :samp:`#include_next` can lead to great confusion.  We
+recommend it be used only when there is no other alternative.  In
+particular, it should not be used in the headers belonging to a specific
+program; it should be used only to make global corrections along the
+lines of :command:`fixincludes`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-defined-behavior.rst b/gcc/doc/cpp/implementation-defined-behavior.rst
new file mode 100644
index 00000000000..8946520eefe
--- /dev/null
+++ b/gcc/doc/cpp/implementation-defined-behavior.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-defined-behavior:
+
+.. _identifier-characters:
+
+Implementation-defined behavior
+*******************************
+
+This is how CPP behaves in all the cases which the C standard
+describes as :dfn:`implementation-defined`.  This term means that the
+implementation is free to do what it likes, but must document its choice
+and stick to it.
+
+.. todo:: Check the C++ standard for more implementation-defined stuff.
+
+* The mapping of physical source file multi-byte characters to the
+  execution character set.
+
+  The input character set can be specified using the
+  :option:`-finput-charset` option, while the execution character set may
+  be controlled using the :option:`-fexec-charset` and
+  :option:`-fwide-exec-charset` options.
+
+* Identifier characters.
+
+  The C and C++ standards allow identifiers to be composed of :samp:`_`
+  and the alphanumeric characters.  C++ also allows universal character
+  names.  C99 and later C standards permit both universal character
+  names and implementation-defined characters.  In both C and C++ modes,
+  GCC accepts in identifiers exactly those extended characters that
+  correspond to universal character names permitted by the chosen
+  standard.
+
+  GCC allows the :samp:`$` character in identifiers as an extension for
+  most targets.  This is true regardless of the std= switch,
+  since this extension cannot conflict with standards-conforming
+  programs.  When preprocessing assembler, however, dollars are not
+  identifier characters by default.
+
+  Currently the targets that by default do not permit :samp:`$` are AVR,
+  IP2K, MMIX, MIPS Irix 3, ARM aout, and PowerPC targets for the AIX
+  operating system.
+
+  You can override the default with :option:`-fdollars-in-identifiers` or
+  :option:`-fno-dollars-in-identifiers`.  See :option:`-fdollars-in-identifiers`.
+
+* Non-empty sequences of whitespace characters.
+
+  In textual output, each whitespace sequence is collapsed to a single
+  space.  For aesthetic reasons, the first token on each non-directive
+  line of output is preceded with sufficient spaces that it appears in the
+  same column as it did in the original source file.
+
+* The numeric value of character constants in preprocessor expressions.
+
+  The preprocessor and compiler interpret character constants in the
+  same way; i.e. escape sequences such as :samp:`\\a` are given the
+  values they would have on the target machine.
+
+  The compiler evaluates a multi-character character constant a character
+  at a time, shifting the previous value left by the number of bits per
+  target character, and then or-ing in the bit-pattern of the new
+  character truncated to the width of a target character.  The final
+  bit-pattern is given type ``int``, and is therefore signed,
+  regardless of whether single characters are signed or not.
+  If there are more
+  characters in the constant than would fit in the target ``int`` the
+  compiler issues a warning, and the excess leading characters are
+  ignored.
+
+  For example, ``'ab'`` for a target with an 8-bit ``char`` would be
+  interpreted as :samp:`(int) ((unsigned char) 'a' * 256 + (unsigned char)
+  'b')`, and ``'\234a'`` as :samp:`(int) ((unsigned char) '\\234' *
+  256 + (unsigned char) 'a')`.
+
+* Source file inclusion.
+
+  For a discussion on how the preprocessor locates header files,
+  :ref:`include-operation`.
+
+* Interpretation of the filename resulting from a macro-expanded
+  :samp:`#include` directive.
+
+  See :ref:`computed-includes`.
+
+* Treatment of a :samp:`#pragma` directive that after macro-expansion
+  results in a standard pragma.
+
+  No macro expansion occurs on any :samp:`#pragma` directive line, so the
+  question does not arise.
+
+  Note that GCC does not yet implement any of the standard
+  pragmas.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-details.rst b/gcc/doc/cpp/implementation-details.rst
new file mode 100644
index 00000000000..326277b1fc9
--- /dev/null
+++ b/gcc/doc/cpp/implementation-details.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-details:
+
+Implementation Details
+----------------------
+
+Here we document details of how the preprocessor's implementation
+affects its user-visible behavior.  You should try to avoid undue
+reliance on behavior described here, as it is possible that it will
+change subtly in future implementations.
+
+Also documented here are obsolete features still supported by CPP.
+
+.. toctree::
+  :maxdepth: 2
+
+  implementation-defined-behavior
+  implementation-limits
+  obsolete-features
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-limits.rst b/gcc/doc/cpp/implementation-limits.rst
new file mode 100644
index 00000000000..18cfc6ab0a6
--- /dev/null
+++ b/gcc/doc/cpp/implementation-limits.rst
@@ -0,0 +1,68 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: implementation limits
+
+.. _implementation-limits:
+
+Implementation limits
+*********************
+
+CPP has a small number of internal limits.  This section lists the
+limits which the C standard requires to be no lower than some minimum,
+and all the others known.  It is intended that there should be as few limits
+as possible.  If you encounter an undocumented or inconvenient limit,
+please report that as a bug.  See :ref:`gcc:bugs`.
+
+Where we say something is limited :dfn:`only by available memory`, that
+means that internal data structures impose no intrinsic limit, and space
+is allocated with ``malloc`` or equivalent.  The actual limit will
+therefore depend on many things, such as the size of other things
+allocated by the compiler at the same time, the amount of memory
+consumed by other processes on the same computer, etc.
+
+* Nesting levels of :samp:`#include` files.
+
+  We impose an arbitrary limit of 200 levels, to avoid runaway recursion.
+  The standard requires at least 15 levels.
+
+* Nesting levels of conditional inclusion.
+
+  The C standard mandates this be at least 63.  CPP is limited only by
+  available memory.
+
+* Levels of parenthesized expressions within a full expression.
+
+  The C standard requires this to be at least 63.  In preprocessor
+  conditional expressions, it is limited only by available memory.
+
+* Significant initial characters in an identifier or macro name.
+
+  The preprocessor treats all characters as significant.  The C standard
+  requires only that the first 63 be significant.
+
+* Number of macros simultaneously defined in a single translation unit.
+
+  The standard requires at least 4095 be possible.  CPP is limited only
+  by available memory.
+
+* Number of parameters in a macro definition and arguments in a macro call.
+
+  We allow ``USHRT_MAX``, which is no smaller than 65,535.  The minimum
+  required by the standard is 127.
+
+* Number of characters on a logical source line.
+
+  The C standard requires a minimum of 4096 be permitted.  CPP places
+  no limits on this, but you may get incorrect column numbers reported in
+  diagnostics for lines longer than 65,535 characters.
+
+* Maximum size of a source file.
+
+  The standard does not specify any lower limit on the maximum size of a
+  source file.  GNU cpp maps files into memory, so it is limited by the
+  available address space.  This is generally at least two gigabytes.
+  Depending on the operating system, the size of physical memory may or
+  may not be a limitation.
\ No newline at end of file
diff --git a/gcc/doc/cpp/index.rst b/gcc/doc/cpp/index.rst
new file mode 100644
index 00000000000..e19dfba42a6
--- /dev/null
+++ b/gcc/doc/cpp/index.rst
@@ -0,0 +1,35 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The C Preprocessor
+==================
+
+The C preprocessor implements the macro language used to transform C,
+C++, and Objective-C programs before they are compiled.  It can also be
+useful on its own.
+
+.. only:: html
+
+  Contents:
+
+.. toctree::
+
+  copyright
+  overview
+  header-files
+  macros
+  conditionals
+  diagnostics
+  line-control
+  pragmas
+  other-directives
+  preprocessor-output
+  traditional-mode
+  implementation-details
+  invocation
+  environment-variables
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/doc/cpp/indices-and-tables.rst b/gcc/doc/cpp/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/doc/cpp/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/initial-processing.rst b/gcc/doc/cpp/initial-processing.rst
new file mode 100644
index 00000000000..9ca96f21428
--- /dev/null
+++ b/gcc/doc/cpp/initial-processing.rst
@@ -0,0 +1,164 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _initial-processing:
+
+Initial processing
+******************
+
+The preprocessor performs a series of textual transformations on its
+input.  These happen before all other processing.  Conceptually, they
+happen in a rigid order, and the entire file is run through each
+transformation before the next one begins.  CPP actually does them
+all at once, for performance reasons.  These transformations correspond
+roughly to the first three 'phases of translation' described in the C
+standard.
+
+.. index:: line endings
+
+* The input file is read into memory and broken into lines.
+
+  Different systems use different conventions to indicate the end of a
+  line.  GCC accepts the ASCII control sequences LF, CR
+  LF and CR as end-of-line markers.  These are the canonical
+  sequences used by Unix, DOS and VMS, and the classic Mac OS (before
+  OSX) respectively.  You may therefore safely copy source code written
+  on any of those systems to a different one and use it without
+  conversion.  (GCC may lose track of the current line number if a file
+  doesn't consistently use one convention, as sometimes happens when it
+  is edited on computers with different conventions that share a network
+  file system.)
+
+  If the last line of any input file lacks an end-of-line marker, the end
+  of the file is considered to implicitly supply one.  The C standard says
+  that this condition provokes undefined behavior, so GCC will emit a
+  warning message.
+
+.. index:: trigraphs
+
+.. _trigraphs:
+
+* If trigraphs are enabled, they are replaced by their
+  corresponding single characters.  By default GCC ignores trigraphs,
+  but if you request a strictly conforming mode with the :option:`-std`
+  option, or you specify the :option:`-trigraphs` option, then it
+  converts them.
+
+  These are nine three-character sequences, all starting with :samp:`??`,
+  that are defined by ISO C to stand for single characters.  They permit
+  obsolete systems that lack some of C's punctuation to use C.  For
+  example, :samp:`??/` stands for :samp:`\\`, so ``'??/n'`` is a character
+  constant for a newline.
+
+  Trigraphs are not popular and many compilers implement them
+  incorrectly.  Portable code should not rely on trigraphs being either
+  converted or ignored.  With :option:`-Wtrigraphs` GCC will warn you
+  when a trigraph may change the meaning of your program if it were
+  converted.  See :ref:`wtrigraphs`.
+
+  In a string constant, you can prevent a sequence of question marks
+  from being confused with a trigraph by inserting a backslash between
+  the question marks, or by separating the string literal at the
+  trigraph and making use of string literal concatenation.  ``"(??\?)"``
+  is the string :samp:`(???)`, not :samp:`(?]`.  Traditional C compilers
+  do not recognize these idioms.
+
+  The nine trigraphs and their replacements are
+
+  .. code-block::
+
+    Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+    Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+.. index:: continued lines, backslash-newline
+
+* Continued lines are merged into one long line.
+
+  A continued line is a line which ends with a backslash, :samp:`\\`.  The
+  backslash is removed and the following line is joined with the current
+  one.  No space is inserted, so you may split a line anywhere, even in
+  the middle of a word.  (It is generally more readable to split lines
+  only at white space.)
+
+  The trailing backslash on a continued line is commonly referred to as a
+  :dfn:`backslash-newline`.
+
+  If there is white space between a backslash and the end of a line, that
+  is still a continued line.  However, as this is usually the result of an
+  editing mistake, and many compilers will not accept it as a continued
+  line, GCC will warn you about it.
+
+.. index:: comments, line comments, block comments
+
+* All comments are replaced with single spaces.
+
+  There are two kinds of comments.  :dfn:`Block comments` begin with
+  :samp:`/*` and continue until the next :samp:`*/`.  Block comments do not
+  nest:
+
+  .. code-block:: c++
+
+    /* this is /* one comment */ text outside comment
+
+  :dfn:`Line comments` begin with :samp:`//` and continue to the end of the
+  current line.  Line comments do not nest either, but it does not matter,
+  because they would end in the same place anyway.
+
+  .. code-block:: c++
+
+    // this is // one comment
+    text outside comment
+
+It is safe to put line comments inside block comments, or vice versa.
+
+.. code-block:: c++
+
+  /* block comment
+     // contains line comment
+     yet more comment
+   */ outside comment
+
+  // line comment /* contains block comment */
+
+But beware of commenting out one end of a block comment with a line
+comment.
+
+.. code-block::
+
+   // l.c.  /* block comment begins
+      oops! this isn't a comment anymore */
+
+Comments are not recognized within string literals.
+``"/* blah */"`` is the string constant :samp:`/\* blah \*/`, not
+an empty string.
+
+Line comments are not in the 1989 edition of the C standard, but they
+are recognized by GCC as an extension.  In C++ and in the 1999 edition
+of the C standard, they are an official part of the language.
+
+Since these transformations happen before all other processing, you can
+split a line mechanically with backslash-newline anywhere.  You can
+comment out the end of a line.  You can continue a line comment onto the
+next line with backslash-newline.  You can even split :samp:`/*`,
+:samp:`*/`, and :samp:`//` onto multiple lines with backslash-newline.
+For example:
+
+.. code-block::
+
+  /\
+  *
+  */ # /*
+  */ defi\
+  ne FO\
+  O 10\
+  20
+
+is equivalent to ``#define FOO 1020``.  All these tricks are
+extremely confusing and should not be used in code intended to be
+readable.
+
+There is no way to prevent a backslash at the end of a line from being
+interpreted as a backslash-newline.  This cannot affect any correct
+program, however.
\ No newline at end of file
diff --git a/gcc/doc/cpp/invocation.rst b/gcc/doc/cpp/invocation.rst
new file mode 100644
index 00000000000..7b13980af5a
--- /dev/null
+++ b/gcc/doc/cpp/invocation.rst
@@ -0,0 +1,81 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: invocation, command line
+
+.. _invocation:
+
+Invocation
+----------
+
+Most often when you use the C preprocessor you do not have to invoke it
+explicitly: the C compiler does so automatically.  However, the
+preprocessor is sometimes useful on its own.  You can invoke the
+preprocessor either with the :command:`cpp` command, or via :command:`gcc -E`.
+In GCC, the preprocessor is actually integrated with the compiler
+rather than a separate program, and both of these commands invoke
+GCC and tell it to stop after the preprocessing phase.
+
+The :command:`cpp` options listed here are also accepted by
+:command:`gcc` and have the same meaning.  Likewise the :command:`cpp`
+command accepts all the usual :command:`gcc` driver options, although those
+pertaining to compilation phases after preprocessing are ignored.
+
+Only options specific to preprocessing behavior are documented here.
+Refer to the GCC manual for full documentation of other driver options.
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  cpp [ :option:`-D`:samp:`{macro}` [= :samp:`{defn}` ]...] [ :option:`-U`:samp:`{macro}` ]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-iquote`:samp:`{dir}`...]
+      [ :option:`-M` | :option:`-MM` ] [ :option:`-MG` ] [ :option:`-MF` :samp:`{filename}` ]
+      [ :option:`-MP` ] [ :option:`-MQ` :samp:`{target}`...]
+      [ :option:`-MT` :samp:`{target}`...]
+      :samp:`{infile}` [[ :option:`-o` ] :samp:`{outfile}` ]
+
+  Only the most useful options are given above; see below for a more
+  complete list of preprocessor-specific options.
+  In addition, :command:`cpp` accepts most :command:`gcc` driver options, which
+  are not listed here.  Refer to the GCC documentation for details.
+
+Options
+^^^^^^^
+
+The :command:`cpp` command expects two file names as arguments, :samp:`{infile}` and
+:samp:`{outfile}`.  The preprocessor reads :samp:`{infile}` together with any
+other files it specifies with :samp:`#include`.  All the output generated
+by the combined input files is written in :samp:`{outfile}`.
+
+Either :samp:`{infile}` or :samp:`{outfile}` may be :option:`-`, which as
+:samp:`{infile}` means to read from standard input and as :samp:`{outfile}`
+means to write to standard output.  If either file is omitted, it
+means the same as if :option:`-` had been specified for that file.
+You can also use the :option:`-o outfile` option to specify the
+output file.
+
+Unless otherwise noted, or the option ends in :samp:`=`, all options
+which take an argument may have that argument appear either immediately
+after the option, or with a space between option and argument:
+:option:`-Ifoo` and :option:`-I foo` have the same effect.
+
+.. index:: grouping options, options, grouping
+
+Many options have multi-letter names; therefore multiple single-letter
+options may *not* be grouped: :option:`-dM` is very different from
+:samp:`-d -M`.
+
+.. index:: options
+
+.. include:: ../../../doc/cppopts.rst
+
+
+.. include:: ../../../doc/cppdiropts.rst
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/line-control.rst b/gcc/doc/cpp/line-control.rst
new file mode 100644
index 00000000000..933d8a9cf1c
--- /dev/null
+++ b/gcc/doc/cpp/line-control.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: line control
+
+.. _line-control:
+
+Line Control
+------------
+
+The C preprocessor informs the C compiler of the location in your source
+code where each token came from.  Presently, this is just the file name
+and line number.  All the tokens resulting from macro expansion are
+reported as having appeared on the line of the source file where the
+outermost macro was used.  We intend to be more accurate in the future.
+
+If you write a program which generates source code, such as the
+:command:`bison` parser generator, you may want to adjust the preprocessor's
+notion of the current file name and line number by hand.  Parts of the
+output from :command:`bison` are generated from scratch, other parts come
+from a standard parser file.  The rest are copied verbatim from
+:command:`bison`'s input.  You would like compiler error messages and
+symbolic debuggers to be able to refer to ``bison`` 's input file.
+
+.. index:: #line
+
+:command:`bison` or any such program can arrange this by writing
+:samp:`#line` directives into the output file.  :samp:`#line` is a
+directive that specifies the original line number and source file name
+for subsequent input in the current preprocessor input file.
+:samp:`#line` has three variants:
+
+:samp:`#line {linenum}`
+  :samp:`{linenum}` is a non-negative decimal integer constant.  It specifies
+  the line number which should be reported for the following line of
+  input.  Subsequent lines are counted from :samp:`{linenum}`.
+
+:samp:`#line {linenum}{filename}`
+  :samp:`{linenum}` is the same as for the first form, and has the same
+  effect.  In addition, :samp:`{filename}` is a string constant.  The
+  following line and all subsequent lines are reported to come from the
+  file it specifies, until something else happens to change that.
+  :samp:`{filename}` is interpreted according to the normal rules for a string
+  constant: backslash escapes are interpreted.  This is different from
+  :samp:`#include`.
+
+:samp:`#line {anything else}`
+  :samp:`{anything else}` is checked for macro calls, which are expanded.
+  The result should match one of the above two forms.
+
+:samp:`#line` directives alter the results of the ``__FILE__`` and
+``__LINE__`` predefined macros from that point on.  See :ref:`standard-predefined-macros`.  They do not have any effect on :samp:`#include`'s
+idea of the directory containing the current file.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros.rst b/gcc/doc/cpp/macros.rst
new file mode 100644
index 00000000000..7355e0719ef
--- /dev/null
+++ b/gcc/doc/cpp/macros.rst
@@ -0,0 +1,37 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _macros:
+
+Macros
+------
+
+A :dfn:`macro` is a fragment of code which has been given a name.
+Whenever the name is used, it is replaced by the contents of the macro.
+There are two kinds of macros.  They differ mostly in what they look
+like when they are used.  :dfn:`Object-like` macros resemble data objects
+when used, :dfn:`function-like` macros resemble function calls.
+
+You may define any valid identifier as a macro, even if it is a C
+keyword.  The preprocessor does not know anything about keywords.  This
+can be useful if you wish to hide a keyword such as ``const`` from an
+older compiler that does not understand it.  However, the preprocessor
+operator ``defined`` (see :ref:`defined`) can never be defined as a
+macro, and C++'s named operators (see :ref:`c++-named-operators`) cannot be
+macros when you are compiling C++.
+
+.. toctree::
+  :maxdepth: 2
+
+  macros/object-like-macros
+  macros/function-like-macros
+  macros/macro-arguments
+  macros/stringizing
+  macros/concatenation
+  macros/variadic-macros
+  macros/predefined-macros
+  macros/undefining-and-redefining-macros
+  macros/directives-within-macro-arguments
+  macros/macro-pitfalls
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/concatenation.rst b/gcc/doc/cpp/macros/concatenation.rst
new file mode 100644
index 00000000000..2f5066ab65e
--- /dev/null
+++ b/gcc/doc/cpp/macros/concatenation.rst
@@ -0,0 +1,85 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: concatenation, token pasting, token concatenation, ## operator
+
+.. _concatenation:
+
+Concatenation
+*************
+
+It is often useful to merge two tokens into one while expanding macros.
+This is called :dfn:`token pasting` or :dfn:`token concatenation`.  The
+:samp:`##` preprocessing operator performs token pasting.  When a macro
+is expanded, the two tokens on either side of each :samp:`##` operator
+are combined into a single token, which then replaces the :samp:`##` and
+the two original tokens in the macro expansion.  Usually both will be
+identifiers, or one will be an identifier and the other a preprocessing
+number.  When pasted, they make a longer identifier.  This isn't the
+only valid case.  It is also possible to concatenate two numbers (or a
+number and a name, such as ``1.5`` and ``e3``) into a number.
+Also, multi-character operators such as ``+=`` can be formed by
+token pasting.
+
+However, two tokens that don't together form a valid token cannot be
+pasted together.  For example, you cannot concatenate ``x`` with
+``+`` in either order.  If you try, the preprocessor issues a warning
+and emits the two tokens.  Whether it puts white space between the
+tokens is undefined.  It is common to find unnecessary uses of :samp:`##`
+in complex macros.  If you get this warning, it is likely that you can
+simply remove the :samp:`##`.
+
+Both the tokens combined by :samp:`##` could come from the macro body,
+but you could just as well write them as one token in the first place.
+Token pasting is most useful when one or both of the tokens comes from a
+macro argument.  If either of the tokens next to an :samp:`##` is a
+parameter name, it is replaced by its actual argument before :samp:`##`
+executes.  As with stringizing, the actual argument is not
+macro-expanded first.  If the argument is empty, that :samp:`##` has no
+effect.
+
+Keep in mind that the C preprocessor converts comments to whitespace
+before macros are even considered.  Therefore, you cannot create a
+comment by concatenating :samp:`/` and :samp:`*`.  You can put as much
+whitespace between :samp:`##` and its operands as you like, including
+comments, and you can put comments in arguments that will be
+concatenated.  However, it is an error if :samp:`##` appears at either
+end of a macro body.
+
+Consider a C program that interprets named commands.  There probably
+needs to be a table of commands, perhaps an array of structures declared
+as follows:
+
+.. code-block:: c++
+
+  struct command
+  {
+    char *name;
+    void (*function) (void);
+  };
+
+  struct command commands[] =
+  {
+    { "quit", quit_command },
+    { "help", help_command },
+    ...
+  };
+
+It would be cleaner not to have to give each command name twice, once in
+the string constant and once in the function name.  A macro which takes the
+name of a command as an argument can make this unnecessary.  The string
+constant can be created with stringizing, and the function name by
+concatenating the argument with :samp:`_command`.  Here is how it is done:
+
+.. code-block:: c++
+
+  #define COMMAND(NAME)  { #NAME, NAME ## _command }
+
+  struct command commands[] =
+  {
+    COMMAND (quit),
+    COMMAND (help),
+    ...
+  };
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/directives-within-macro-arguments.rst b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
new file mode 100644
index 00000000000..2e7e82563e9
--- /dev/null
+++ b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: macro arguments and directives
+
+.. _directives-within-macro-arguments:
+
+Directives Within Macro Arguments
+*********************************
+
+Occasionally it is convenient to use preprocessor directives within
+the arguments of a macro.  The C and C++ standards declare that
+behavior in these cases is undefined.  GNU CPP
+processes arbitrary directives within macro arguments in
+exactly the same way as it would have processed the directive were the
+function-like macro invocation not present.
+
+If, within a macro invocation, that macro is redefined, then the new
+definition takes effect in time for argument pre-expansion, but the
+original definition is still used for argument replacement.  Here is a
+pathological example:
+
+.. code-block:: c++
+
+  #define f(x) x x
+  f (1
+  #undef f
+  #define f 2
+  f)
+
+which expands to
+
+.. code-block:: c++
+
+  1 2 1 2
+
+with the semantics described above.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/function-like-macros.rst b/gcc/doc/cpp/macros/function-like-macros.rst
new file mode 100644
index 00000000000..16ba2cf1a1a
--- /dev/null
+++ b/gcc/doc/cpp/macros/function-like-macros.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: function-like macros
+
+.. _function-like-macros:
+
+Function-like Macros
+********************
+
+You can also define macros whose use looks like a function call.  These
+are called :dfn:`function-like macros`.  To define a function-like macro,
+you use the same :samp:`#define` directive, but you put a pair of
+parentheses immediately after the macro name.  For example,
+
+.. code-block::
+
+  #define lang_init()  c_init()
+  lang_init()
+       → c_init()
+
+A function-like macro is only expanded if its name appears with a pair
+of parentheses after it.  If you write just the name, it is left alone.
+This can be useful when you have a function and a macro of the same
+name, and you wish to use the function sometimes.
+
+.. code-block::
+
+  extern void foo(void);
+  #define foo() /* optimized inline version */
+  ...
+    foo();
+    funcptr = foo;
+
+Here the call to ``foo()`` will use the macro, but the function
+pointer will get the address of the real function.  If the macro were to
+be expanded, it would cause a syntax error.
+
+If you put spaces between the macro name and the parentheses in the
+macro definition, that does not define a function-like macro, it defines
+an object-like macro whose expansion happens to begin with a pair of
+parentheses.
+
+.. code-block::
+
+  #define lang_init ()    c_init()
+  lang_init()
+       → () c_init()()
+
+The first two pairs of parentheses in this expansion come from the
+macro.  The third is the pair that was originally after the macro
+invocation.  Since ``lang_init`` is an object-like macro, it does not
+consume those parentheses.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-arguments.rst b/gcc/doc/cpp/macros/macro-arguments.rst
new file mode 100644
index 00000000000..06911523e7f
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-arguments.rst
@@ -0,0 +1,112 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: arguments, macros with arguments, arguments in macro definitions
+
+.. _macro-arguments:
+
+Macro Arguments
+***************
+
+Function-like macros can take :dfn:`arguments`, just like true functions.
+To define a macro that uses arguments, you insert :dfn:`parameters`
+between the pair of parentheses in the macro definition that make the
+macro function-like.  The parameters must be valid C identifiers,
+separated by commas and optionally whitespace.
+
+To invoke a macro that takes arguments, you write the name of the macro
+followed by a list of :dfn:`actual arguments` in parentheses, separated
+by commas.  The invocation of the macro need not be restricted to a
+single logical line---it can cross as many lines in the source file as
+you wish.  The number of arguments you give must match the number of
+parameters in the macro definition.  When the macro is expanded, each
+use of a parameter in its body is replaced by the tokens of the
+corresponding argument.  (You need not use all of the parameters in the
+macro body.)
+
+As an example, here is a macro that computes the minimum of two numeric
+values, as it is defined in many C programs, and some uses.
+
+.. code-block::
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+    x = min(a, b);          →  x = ((a) < (b) ? (a) : (b));
+    y = min(1, 2);          →  y = ((1) < (2) ? (1) : (2));
+    z = min(a + 28, *p);    →  z = ((a + 28) < (*p) ? (a + 28) : (*p));
+
+(In this small example you can already see several of the dangers of
+macro arguments.  See :ref:`macro-pitfalls`, for detailed explanations.)
+
+Leading and trailing whitespace in each argument is dropped, and all
+whitespace between the tokens of an argument is reduced to a single
+space.  Parentheses within each argument must balance; a comma within
+such parentheses does not end the argument.  However, there is no
+requirement for square brackets or braces to balance, and they do not
+prevent a comma from separating arguments.  Thus,
+
+.. code-block:: c++
+
+  macro (array[x = y, x + 1])
+
+passes two arguments to ``macro`` : ``array[x = y`` and ``x +
+1]``.  If you want to supply ``array[x = y, x + 1]`` as an argument,
+you can write it as ``array[(x = y, x + 1)]``, which is equivalent C
+code.
+
+All arguments to a macro are completely macro-expanded before they are
+substituted into the macro body.  After substitution, the complete text
+is scanned again for macros to expand, including the arguments.  This rule
+may seem strange, but it is carefully designed so you need not worry
+about whether any function call is actually a macro invocation.  You can
+run into trouble if you try to be too clever, though.  See :ref:`argument-prescan`, for detailed discussion.
+
+For example, ``min (min (a, b), c)`` is first expanded to
+
+.. code-block:: c++
+
+    min (((a) < (b) ? (a) : (b)), (c))
+
+and then to
+
+.. code-block:: c++
+
+  ((((a) < (b) ? (a) : (b))) < (c)
+   ? (((a) < (b) ? (a) : (b)))
+   : (c))
+
+(Line breaks shown here for clarity would not actually be generated.)
+
+.. index:: empty macro arguments
+
+You can leave macro arguments empty; this is not an error to the
+preprocessor (but many macros will then expand to invalid code).
+You cannot leave out arguments entirely; if a macro takes two arguments,
+there must be exactly one comma at the top level of its argument list.
+Here are some silly examples using ``min`` :
+
+.. code-block::
+
+  min(, b)        → ((   ) < (b) ? (   ) : (b))
+  min(a, )        → ((a  ) < ( ) ? (a  ) : ( ))
+  min(,)          → ((   ) < ( ) ? (   ) : ( ))
+  min((,),)       → (((,)) < ( ) ? ((,)) : ( ))
+
+  min()      error macro "min" requires 2 arguments, but only 1 given
+  min(,,)    error macro "min" passed 3 arguments, but takes just 2
+
+Whitespace is not a preprocessing token, so if a macro ``foo`` takes
+one argument, ``foo ()`` and ``foo ( )`` both supply it an
+empty argument.  Previous GNU preprocessor implementations and
+documentation were incorrect on this point, insisting that a
+function-like macro that takes a single argument be passed a space if an
+empty argument was required.
+
+Macro parameters appearing inside string literals are not replaced by
+their corresponding actual arguments.
+
+.. code-block::
+
+  #define foo(x) x, "x"
+  foo(bar)        → bar, "x"
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-pitfalls.rst b/gcc/doc/cpp/macros/macro-pitfalls.rst
new file mode 100644
index 00000000000..0be22954a76
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-pitfalls.rst
@@ -0,0 +1,449 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: problems with macros, pitfalls of macros
+
+.. _macro-pitfalls:
+
+Macro Pitfalls
+**************
+
+In this section we describe some special rules that apply to macros and
+macro expansion, and point out certain cases in which the rules have
+counter-intuitive consequences that you must watch out for.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. _misnesting:
+
+Misnesting
+^^^^^^^^^^
+
+When a macro is called with arguments, the arguments are substituted
+into the macro body and the result is checked, together with the rest of
+the input file, for more macro calls.  It is possible to piece together
+a macro call coming partially from the macro body and partially from the
+arguments.  For example,
+
+.. code-block::
+
+  #define twice(x) (2*(x))
+  #define call_with_1(x) x(1)
+  call_with_1 (twice)
+       → twice(1)
+       → (2*(1))
+
+Macro definitions do not have to have balanced parentheses.  By writing
+an unbalanced open parenthesis in a macro body, it is possible to create
+a macro call that begins inside the macro body but ends outside of it.
+For example,
+
+.. code-block::
+
+  #define strange(file) fprintf (file, "%s %d",
+  ...
+  strange(stderr) p, 35)
+       → fprintf (stderr, "%s %d", p, 35)
+
+The ability to piece together a macro call can be useful, but the use of
+unbalanced open parentheses in a macro body is just confusing, and
+should be avoided.
+
+.. index:: parentheses in macro bodies
+
+.. _operator-precedence-problems:
+
+Operator Precedence Problems
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You may have noticed that in most of the macro definition examples shown
+above, each occurrence of a macro argument name had parentheses around
+it.  In addition, another pair of parentheses usually surround the
+entire macro definition.  Here is why it is best to write macros that
+way.
+
+Suppose you define a macro as follows,
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (x + y - 1) / y
+
+whose purpose is to divide, rounding up.  (One use for this operation is
+to compute how many ``int`` objects are needed to hold a certain
+number of ``char`` objects.)  Then suppose it is used as follows:
+
+.. code-block::
+
+  a = ceil_div (b & c, sizeof (int));
+       → a = (b & c + sizeof (int) - 1) / sizeof (int);
+
+This does not do what is intended.  The operator-precedence rules of
+C make it equivalent to this:
+
+.. code-block:: c++
+
+  a = (b & (c + sizeof (int) - 1)) / sizeof (int);
+
+What we want is this:
+
+.. code-block:: c++
+
+  a = ((b & c) + sizeof (int) - 1)) / sizeof (int);
+
+Defining the macro as
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) ((x) + (y) - 1) / (y)
+
+provides the desired result.
+
+Unintended grouping can result in another way.  Consider ``sizeof
+ceil_div(1, 2)``.  That has the appearance of a C expression that would
+compute the size of the type of ``ceil_div (1, 2)``, but in fact it
+means something very different.  Here is what it expands to:
+
+.. code-block:: c++
+
+  sizeof ((1) + (2) - 1) / (2)
+
+This would take the size of an integer and divide it by two.  The
+precedence rules have put the division outside the ``sizeof`` when it
+was intended to be inside.
+
+Parentheses around the entire macro definition prevent such problems.
+Here, then, is the recommended way to define ``ceil_div`` :
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (((x) + (y) - 1) / (y))
+
+.. index:: semicolons (after macro calls)
+
+.. _swallowing-the-semicolon:
+
+Swallowing the Semicolon
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+Often it is desirable to define a macro that expands into a compound
+statement.  Consider, for example, the following macro, that advances a
+pointer (the argument ``p`` says where to find it) across whitespace
+characters:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)  \
+  { char *lim = (limit);         \
+    while (p < lim) {            \
+      if (*p++ != ' ') {         \
+        p--; break; }}}
+
+Here backslash-newline is used to split the macro definition, which must
+be a single logical line, so that it resembles the way such code would
+be laid out if not part of a macro definition.
+
+A call to this macro might be ``SKIP_SPACES (p, lim)``.  Strictly
+speaking, the call expands to a compound statement, which is a complete
+statement with no need for a semicolon to end it.  However, since it
+looks like a function call, it minimizes confusion if you can use it
+like a function call, writing a semicolon afterward, as in
+``SKIP_SPACES (p, lim);``
+
+This can cause trouble before ``else`` statements, because the
+semicolon is actually a null statement.  Suppose you write
+
+.. code-block:: c++
+
+  if (*p != 0)
+    SKIP_SPACES (p, lim);
+  else ...
+
+The presence of two statements---the compound statement and a null
+statement---in between the ``if`` condition and the ``else``
+makes invalid C code.
+
+The definition of the macro ``SKIP_SPACES`` can be altered to solve
+this problem, using a ``do ... while`` statement.  Here is how:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)     \
+  do { char *lim = (limit);         \
+       while (p < lim) {            \
+         if (*p++ != ' ') {         \
+           p--; break; }}}          \
+  while (0)
+
+Now ``SKIP_SPACES (p, lim);`` expands into
+
+.. code-block:: c++
+
+  do {...} while (0);
+
+which is one statement.  The loop executes exactly once; most compilers
+generate no extra code for it.
+
+.. index:: side effects (in macro arguments), unsafe macros
+
+.. _duplication-of-side-effects:
+
+Duplication of Side Effects
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Many C programs define a macro ``min``, for 'minimum', like this:
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+
+When you use this macro with an argument containing a side effect,
+as shown here,
+
+.. code-block:: c++
+
+  next = min (x + y, foo (z));
+
+it expands as follows:
+
+.. code-block:: c++
+
+  next = ((x + y) < (foo (z)) ? (x + y) : (foo (z)));
+
+where ``x + y`` has been substituted for ``X`` and ``foo (z)``
+for ``Y``.
+
+The function ``foo`` is used only once in the statement as it appears
+in the program, but the expression ``foo (z)`` has been substituted
+twice into the macro expansion.  As a result, ``foo`` might be called
+two times when the statement is executed.  If it has side effects or if
+it takes a long time to compute, the results might not be what you
+intended.  We say that ``min`` is an :dfn:`unsafe` macro.
+
+The best solution to this problem is to define ``min`` in a way that
+computes the value of ``foo (z)`` only once.  The C language offers
+no standard way to do this, but it can be done with GNU extensions as
+follows:
+
+.. code-block:: c++
+
+  #define min(X, Y)                \
+  ({ typeof (X) x_ = (X);          \
+     typeof (Y) y_ = (Y);          \
+     (x_ < y_) ? x_ : y_; })
+
+The :samp:`({ ... })` notation produces a compound statement that
+acts as an expression.  Its value is the value of its last statement.
+This permits us to define local variables and assign each argument to
+one.  The local variables have underscores after their names to reduce
+the risk of conflict with an identifier of wider scope (it is impossible
+to avoid this entirely).  Now each argument is evaluated exactly once.
+
+If you do not wish to use GNU C extensions, the only solution is to be
+careful when *using* the macro ``min``.  For example, you can
+calculate the value of ``foo (z)``, save it in a variable, and use
+that variable in ``min`` :
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+  ...
+  {
+    int tem = foo (z);
+    next = min (x + y, tem);
+  }
+
+(where we assume that ``foo`` returns type ``int``).
+
+.. index:: self-reference
+
+.. _self-referential-macros:
+
+Self-Referential Macros
+^^^^^^^^^^^^^^^^^^^^^^^
+
+A :dfn:`self-referential` macro is one whose name appears in its
+definition.  Recall that all macro definitions are rescanned for more
+macros to replace.  If the self-reference were considered a use of the
+macro, it would produce an infinitely large expansion.  To prevent this,
+the self-reference is not considered a macro call.  It is passed into
+the preprocessor output unchanged.  Consider an example:
+
+.. code-block:: c++
+
+  #define foo (4 + foo)
+
+where ``foo`` is also a variable in your program.
+
+Following the ordinary rules, each reference to ``foo`` will expand
+into ``(4 + foo)`` ; then this will be rescanned and will expand into
+``(4 + (4 + foo))`` ; and so on until the computer runs out of memory.
+
+The self-reference rule cuts this process short after one step, at
+``(4 + foo)``.  Therefore, this macro definition has the possibly
+useful effect of causing the program to add 4 to the value of ``foo``
+wherever ``foo`` is referred to.
+
+In most cases, it is a bad idea to take advantage of this feature.  A
+person reading the program who sees that ``foo`` is a variable will
+not expect that it is a macro as well.  The reader will come across the
+identifier ``foo`` in the program and think its value should be that
+of the variable ``foo``, whereas in fact the value is four greater.
+
+One common, useful use of self-reference is to create a macro which
+expands to itself.  If you write
+
+.. code-block:: c++
+
+  #define EPERM EPERM
+
+then the macro ``EPERM`` expands to ``EPERM``.  Effectively, it is
+left alone by the preprocessor whenever it's used in running text.  You
+can tell that it's a macro with :samp:`#ifdef`.  You might do this if you
+want to define numeric constants with an ``enum``, but have
+:samp:`#ifdef` be true for each constant.
+
+If a macro ``x`` expands to use a macro ``y``, and the expansion of
+``y`` refers to the macro ``x``, that is an :dfn:`indirect
+self-reference` of ``x``.  ``x`` is not expanded in this case
+either.  Thus, if we have
+
+.. code-block:: c++
+
+  #define x (4 + y)
+  #define y (2 * x)
+
+then ``x`` and ``y`` expand as follows:
+
+.. code-block::
+
+  x    → (4 + y)
+       → (4 + (2 * x))
+
+  y    → (2 * x)
+       → (2 * (4 + y))
+
+Each macro is expanded when it appears in the definition of the other
+macro, but not when it indirectly appears in its own definition.
+
+.. index:: expansion of arguments, macro argument expansion, prescan of macro arguments
+
+.. _argument-prescan:
+
+Argument Prescan
+^^^^^^^^^^^^^^^^
+
+Macro arguments are completely macro-expanded before they are
+substituted into a macro body, unless they are stringized or pasted
+with other tokens.  After substitution, the entire macro body, including
+the substituted arguments, is scanned again for macros to be expanded.
+The result is that the arguments are scanned *twice* to expand
+macro calls in them.
+
+Most of the time, this has no effect.  If the argument contained any
+macro calls, they are expanded during the first scan.  The result
+therefore contains no macro calls, so the second scan does not change
+it.  If the argument were substituted as given, with no prescan, the
+single remaining scan would find the same macro calls and produce the
+same results.
+
+You might expect the double scan to change the results when a
+self-referential macro is used in an argument of another macro
+(see :ref:`self-referential-macros`): the self-referential macro would be
+expanded once in the first scan, and a second time in the second scan.
+However, this is not what happens.  The self-references that do not
+expand in the first scan are marked so that they will not expand in the
+second scan either.
+
+You might wonder, 'Why mention the prescan, if it makes no difference?
+And why not skip it and make the preprocessor faster?'  The answer is
+that the prescan does make a difference in three special cases:
+
+* Nested calls to a macro.
+
+  We say that :dfn:`nested` calls to a macro occur when a macro's argument
+  contains a call to that very macro.  For example, if ``f`` is a macro
+  that expects one argument, ``f (f (1))`` is a nested pair of calls to
+  ``f``.  The desired expansion is made by expanding ``f (1)`` and
+  substituting that into the definition of ``f``.  The prescan causes
+  the expected result to happen.  Without the prescan, ``f (1)`` itself
+  would be substituted as an argument, and the inner use of ``f`` would
+  appear during the main scan as an indirect self-reference and would not
+  be expanded.
+
+* Macros that call other macros that stringize or concatenate.
+
+  If an argument is stringized or concatenated, the prescan does not
+  occur.  If you *want* to expand a macro, then stringize or
+  concatenate its expansion, you can do that by causing one macro to call
+  another macro that does the stringizing or concatenation.  For
+  instance, if you have
+
+  .. code-block:: c++
+
+    #define AFTERX(x) X_ ## x
+    #define XAFTERX(x) AFTERX(x)
+    #define TABLESIZE 1024
+    #define BUFSIZE TABLESIZE
+
+  then ``AFTERX(BUFSIZE)`` expands to ``X_BUFSIZE``, and
+  ``XAFTERX(BUFSIZE)`` expands to ``X_1024``.  (Not to
+  ``X_TABLESIZE``.  Prescan always does a complete expansion.)
+
+* Macros used in arguments, whose expansions contain unshielded commas.
+
+  This can cause a macro expanded on the second scan to be called with the
+  wrong number of arguments.  Here is an example:
+
+  .. code-block:: c++
+
+    #define foo  a,b
+    #define bar(x) lose(x)
+    #define lose(x) (1 + (x))
+
+  We would like ``bar(foo)`` to turn into ``(1 + (foo))``, which
+  would then turn into ``(1 + (a,b))``.  Instead, ``bar(foo)``
+  expands into ``lose(a,b)``, and you get an error because ``lose``
+  requires a single argument.  In this case, the problem is easily solved
+  by the same parentheses that ought to be used to prevent misnesting of
+  arithmetic operations:
+
+  .. code-block::
+
+    #define foo (a,b)
+    or#define bar(x) lose((x))
+
+  The extra pair of parentheses prevents the comma in ``foo`` 's
+  definition from being interpreted as an argument separator.
+
+.. index:: newlines in macro arguments
+
+.. _newlines-in-arguments:
+
+Newlines in Arguments
+^^^^^^^^^^^^^^^^^^^^^
+
+The invocation of a function-like macro can extend over many logical
+lines.  However, in the present implementation, the entire expansion
+comes out on one line.  Thus line numbers emitted by the compiler or
+debugger refer to the line the invocation started on, which might be
+different to the line containing the argument causing the problem.
+
+Here is an example illustrating this:
+
+.. code-block:: c++
+
+  #define ignore_second_arg(a,b,c) a; c
+
+  ignore_second_arg (foo (),
+                     ignored (),
+                     syntax error);
+
+The syntax error triggered by the tokens ``syntax error`` results in
+an error message citing line three---the line of ignore_second_arg---
+even though the problematic code comes from line five.
+
+We consider this a bug, and intend to fix it in the near future.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/object-like-macros.rst b/gcc/doc/cpp/macros/object-like-macros.rst
new file mode 100644
index 00000000000..c5e6e4cd466
--- /dev/null
+++ b/gcc/doc/cpp/macros/object-like-macros.rst
@@ -0,0 +1,126 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: object-like macro, symbolic constants, manifest constants
+
+.. _object-like-macros:
+
+Object-like Macros
+******************
+
+An :dfn:`object-like macro` is a simple identifier which will be replaced
+by a code fragment.  It is called object-like because it looks like a
+data object in code that uses it.  They are most commonly used to give
+symbolic names to numeric constants.
+
+.. index:: #define
+
+You create macros with the :samp:`#define` directive.  :samp:`#define` is
+followed by the name of the macro and then the token sequence it should
+be an abbreviation for, which is variously referred to as the macro's
+:dfn:`body`, :dfn:`expansion` or :dfn:`replacement list`.  For example,
+
+.. code-block:: c++
+
+  #define BUFFER_SIZE 1024
+
+defines a macro named ``BUFFER_SIZE`` as an abbreviation for the
+token ``1024``.  If somewhere after this :samp:`#define` directive
+there comes a C statement of the form
+
+.. code-block:: c++
+
+  foo = (char *) malloc (BUFFER_SIZE);
+
+then the C preprocessor will recognize and :dfn:`expand` the macro
+``BUFFER_SIZE``.  The C compiler will see the same tokens as it would
+if you had written
+
+.. code-block:: c++
+
+  foo = (char *) malloc (1024);
+
+By convention, macro names are written in uppercase.  Programs are
+easier to read when it is possible to tell at a glance which names are
+macros.
+
+The macro's body ends at the end of the :samp:`#define` line.  You may
+continue the definition onto multiple lines, if necessary, using
+backslash-newline.  When the macro is expanded, however, it will all
+come out on one line.  For example,
+
+.. code-block::
+
+  #define NUMBERS 1, \
+                  2, \
+                  3
+  int x[] = { NUMBERS };
+       → int x[] = { 1, 2, 3 };
+
+The most common visible consequence of this is surprising line numbers
+in error messages.
+
+There is no restriction on what can go in a macro body provided it
+decomposes into valid preprocessing tokens.  Parentheses need not
+balance, and the body need not resemble valid C code.  (If it does not,
+you may get error messages from the C compiler when you use the macro.)
+
+The C preprocessor scans your program sequentially.  Macro definitions
+take effect at the place you write them.  Therefore, the following input
+to the C preprocessor
+
+.. code-block:: c++
+
+  foo = X;
+  #define X 4
+  bar = X;
+
+produces
+
+.. code-block:: c++
+
+  foo = X;
+  bar = 4;
+
+When the preprocessor expands a macro name, the macro's expansion
+replaces the macro invocation, then the expansion is examined for more
+macros to expand.  For example,
+
+.. code-block::
+
+  #define TABLESIZE BUFSIZE
+  #define BUFSIZE 1024
+  TABLESIZE
+       → BUFSIZE
+       → 1024
+
+``TABLESIZE`` is expanded first to produce ``BUFSIZE``, then that
+macro is expanded to produce the final result, ``1024``.
+
+Notice that ``BUFSIZE`` was not defined when ``TABLESIZE`` was
+defined.  The :samp:`#define` for ``TABLESIZE`` uses exactly the
+expansion you specify---in this case, ``BUFSIZE`` ---and does not
+check to see whether it too contains macro names.  Only when you
+*use* ``TABLESIZE`` is the result of its expansion scanned for
+more macro names.
+
+This makes a difference if you change the definition of ``BUFSIZE``
+at some point in the source file.  ``TABLESIZE``, defined as shown,
+will always expand using the definition of ``BUFSIZE`` that is
+currently in effect:
+
+.. code-block:: c++
+
+  #define BUFSIZE 1020
+  #define TABLESIZE BUFSIZE
+  #undef BUFSIZE
+  #define BUFSIZE 37
+
+Now ``TABLESIZE`` expands (in two stages) to ``37``.
+
+If the expansion of a macro contains its own name, either directly or
+via intermediate macros, it is not expanded again when the expansion is
+examined for more macros.  This prevents infinite recursion.
+See :ref:`self-referential-macros`, for the precise details.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/predefined-macros.rst b/gcc/doc/cpp/macros/predefined-macros.rst
new file mode 100644
index 00000000000..8af566e0dc3
--- /dev/null
+++ b/gcc/doc/cpp/macros/predefined-macros.rst
@@ -0,0 +1,874 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: predefined macros
+
+.. _predefined-macros:
+
+Predefined Macros
+*****************
+
+Several object-like macros are predefined; you use them without
+supplying their definitions.  They fall into three classes: standard,
+common, and system-specific.
+
+In C++, there is a fourth category, the named operators.  They act like
+predefined macros, but you cannot undefine them.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: standard predefined macros.
+
+.. _standard-predefined-macros:
+
+Standard Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The standard predefined macros are specified by the relevant
+language standards, so they are available with all compilers that
+implement those standards.  Older compilers may not provide all of
+them.  Their names all start with double underscores.
+
+.. c:macro:: __FILE__
+
+  This macro expands to the name of the current input file, in the form of
+  a C string constant.  This is the path by which the preprocessor opened
+  the file, not the short name specified in :samp:`#include` or as the
+  input file name argument.  For example,
+  ``"/usr/local/include/myheader.h"`` is a possible expansion of this
+  macro.
+
+.. c:macro:: __LINE__
+
+  This macro expands to the current input line number, in the form of a
+  decimal integer constant.  While we call it a predefined macro, it's
+  a pretty strange macro, since its 'definition' changes with each
+  new line of source code.
+
+  ``__FILE__`` and ``__LINE__`` are useful in generating an error
+  message to report an inconsistency detected by the program; the message
+  can state the source line at which the inconsistency was detected.  For
+  example,
+
+.. code-block:: c++
+
+  fprintf (stderr, "Internal error: "
+                   "negative string length "
+                   "%d at %s, line %d.",
+           length, __FILE__, __LINE__);
+
+An :samp:`#include` directive changes the expansions of ``__FILE__``
+and ``__LINE__`` to correspond to the included file.  At the end of
+that file, when processing resumes on the input file that contained
+the :samp:`#include` directive, the expansions of ``__FILE__`` and
+``__LINE__`` revert to the values they had before the
+:samp:`#include` (but ``__LINE__`` is then incremented by one as
+processing moves to the line after the :samp:`#include`).
+
+A :samp:`#line` directive changes ``__LINE__``, and may change
+``__FILE__`` as well.  See :ref:`line-control`.
+
+C99 introduced ``__func__``, and GCC has provided ``__FUNCTION__``
+for a long time.  Both of these are strings containing the name of the
+current function (there are slight semantic differences; see the GCC
+manual).  Neither of them is a macro; the preprocessor does not know the
+name of the current function.  They tend to be useful in conjunction
+with ``__FILE__`` and ``__LINE__``, though.
+
+.. c:macro:: __DATE__
+
+  This macro expands to a string constant that describes the date on which
+  the preprocessor is being run.  The string constant contains eleven
+  characters and looks like ``"Feb 12 1996"``.  If the day of the
+  month is less than 10, it is padded with a space on the left.
+
+  If GCC cannot determine the current date, it will emit a warning message
+  (once per compilation) and ``__DATE__`` will expand to
+  ``"??? ?? ????"``.
+
+.. c:macro:: __TIME__
+
+  This macro expands to a string constant that describes the time at
+  which the preprocessor is being run.  The string constant contains
+  eight characters and looks like ``"23:59:01"``.
+
+  If GCC cannot determine the current time, it will emit a warning message
+  (once per compilation) and ``__TIME__`` will expand to
+  ``"??:??:??"``.
+
+.. c:macro:: __STDC__
+
+  In normal operation, this macro expands to the constant 1, to signify
+  that this compiler conforms to ISO Standard C.  If GNU CPP is used with
+  a compiler other than GCC, this is not necessarily true; however, the
+  preprocessor always conforms to the standard unless the
+  :option:`-traditional-cpp` option is used.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is used.
+
+  On some hosts, the system compiler uses a different convention, where
+  ``__STDC__`` is normally 0, but is 1 if the user specifies strict
+  conformance to the C Standard.  CPP follows the host convention when
+  processing system header files, but when processing user files
+  ``__STDC__`` is always 1.  This has been reported to cause problems;
+  for instance, some versions of Solaris provide X Windows headers that
+  expect ``__STDC__`` to be either undefined or 1.  See :ref:`invocation`.
+
+.. c:macro:: __STDC_VERSION__
+
+  This macro expands to the C Standard's version number, a long integer
+  constant of the form ``yyyymmL`` where :samp:`{yyyy}` and
+  :samp:`{mm}` are the year and month of the Standard version.  This signifies
+  which version of the C Standard the compiler conforms to.  Like
+  ``__STDC__``, this is not necessarily accurate for the entire
+  implementation, unless GNU CPP is being used with GCC.
+
+  The value ``199409L`` signifies the 1989 C standard as amended in
+  1994, which is the current default; the value ``199901L`` signifies
+  the 1999 revision of the C standard; the value ``201112L``
+  signifies the 2011 revision of the C standard; the value
+  ``201710L`` signifies the 2017 revision of the C standard (which is
+  otherwise identical to the 2011 version apart from correction of
+  defects).  An unspecified value larger than ``201710L`` is used for
+  the experimental :option:`-std=c2x` and :option:`-std=gnu2x` modes.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is
+  used, nor when compiling C++ or Objective-C.
+
+.. c:macro:: __STDC_HOSTED__
+
+  This macro is defined, with value 1, if the compiler's target is a
+  :dfn:`hosted environment`.  A hosted environment has the complete
+  facilities of the standard C library available.
+
+.. c:macro:: __cplusplus
+
+  This macro is defined when the C++ compiler is in use.  You can use
+  ``__cplusplus`` to test whether a header is compiled by a C compiler
+  or a C++ compiler.  This macro is similar to ``__STDC_VERSION__``, in
+  that it expands to a version number.  Depending on the language standard
+  selected, the value of the macro is
+  ``199711L`` for the 1998 C++ standard,
+  ``201103L`` for the 2011 C++ standard,
+  ``201402L`` for the 2014 C++ standard,
+  ``201703L`` for the 2017 C++ standard,
+  ``202002L`` for the 2020 C++ standard,
+  or an unspecified value strictly larger than ``202002L`` for the
+  experimental languages enabled by :option:`-std=c++23` and
+  :option:`-std=gnu++23`.
+
+.. c:macro:: __OBJC__
+
+  This macro is defined, with value 1, when the Objective-C compiler is in
+  use.  You can use ``__OBJC__`` to test whether a header is compiled
+  by a C compiler or an Objective-C compiler.
+
+.. c:macro:: __ASSEMBLER__
+
+  This macro is defined with value 1 when preprocessing assembly
+  language.
+
+.. index:: common predefined macros
+
+.. _common-predefined-macros:
+
+Common Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+The common predefined macros are GNU C extensions.  They are available
+with the same meanings regardless of the machine or operating system on
+which you are using GNU C or GNU Fortran.  Their names all start with
+double underscores.
+
+.. c:macro:: __COUNTER__
+
+  This macro expands to sequential integral values starting from 0.  In
+  conjunction with the ``##`` operator, this provides a convenient means to
+  generate unique identifiers.  Care must be taken to ensure that
+  ``__COUNTER__`` is not expanded prior to inclusion of precompiled headers
+  which use it.  Otherwise, the precompiled headers will not be used.
+
+.. c:macro:: __GFORTRAN__
+
+  The GNU Fortran compiler defines this.
+
+.. c:macro:: __GNUC__
+             __GNUC_MINOR__
+             __GNUC_PATCHLEVEL__
+
+  These macros are defined by all GNU compilers that use the C
+  preprocessor: C, C++, Objective-C and Fortran.  Their values are the major
+  version, minor version, and patch level of the compiler, as integer
+  constants.  For example, GCC version :samp:`{x}`. :samp:`{y}`. :samp:`{z}`
+  defines ``__GNUC__`` to :samp:`{x}`, ``__GNUC_MINOR__`` to :samp:`{y}`,
+  and ``__GNUC_PATCHLEVEL__`` to :samp:`{z}`.  These
+  macros are also defined if you invoke the preprocessor directly.
+
+  If all you need to know is whether or not your program is being compiled
+  by GCC, or a non-GCC compiler that claims to accept the GNU C dialects,
+  you can simply test ``__GNUC__``.  If you need to write code
+  which depends on a specific version, you must be more careful.  Each
+  time the minor version is increased, the patch level is reset to zero;
+  each time the major version is increased, the
+  minor version and patch level are reset.  If you wish to use the
+  predefined macros directly in the conditional, you will need to write it
+  like this:
+
+  .. code-block:: c++
+
+    /* Test for GCC > 3.2.0 */
+    #if __GNUC__ > 3 || \
+        (__GNUC__ == 3 && (__GNUC_MINOR__ > 2 || \
+                           (__GNUC_MINOR__ == 2 && \
+                            __GNUC_PATCHLEVEL__ > 0))
+
+  Another approach is to use the predefined macros to
+  calculate a single number, then compare that against a threshold:
+
+  .. code-block:: c++
+
+    #define GCC_VERSION (__GNUC__ * 10000 \
+                         + __GNUC_MINOR__ * 100 \
+                         + __GNUC_PATCHLEVEL__)
+    ...
+    /* Test for GCC > 3.2.0 */
+    #if GCC_VERSION > 30200
+
+  Many people find this form easier to understand.
+
+.. c:macro:: __GNUG__
+
+  The GNU C++ compiler defines this.  Testing it is equivalent to
+  testing ``(__GNUC__ && __cplusplus)``.
+
+.. c:macro:: __STRICT_ANSI__
+
+  GCC defines this macro if and only if the :option:`-ansi` switch, or a
+  :option:`-std` switch specifying strict conformance to some version of ISO C
+  or ISO C++, was specified when GCC was invoked.  It is defined to :samp:`1`.
+  This macro exists primarily to direct GNU libc's header files to use only
+  definitions found in standard C.
+
+.. c:macro:: __BASE_FILE__
+
+  This macro expands to the name of the main input file, in the form
+  of a C string constant.  This is the source file that was specified
+  on the command line of the preprocessor or C compiler.
+
+.. c:macro:: __FILE_NAME__
+
+  This macro expands to the basename of the current input file, in the
+  form of a C string constant.  This is the last path component by which
+  the preprocessor opened the file.  For example, processing
+  ``"/usr/local/include/myheader.h"`` would set this
+  macro to ``"myheader.h"``.
+
+.. c:macro:: __INCLUDE_LEVEL__
+
+  This macro expands to a decimal integer constant that represents the
+  depth of nesting in include files.  The value of this macro is
+  incremented on every :samp:`#include` directive and decremented at the
+  end of every included file.  It starts out at 0, its value within the
+  base file specified on the command line.
+
+.. c:macro:: __ELF__
+
+  This macro is defined if the target uses the ELF object format.
+
+.. c:macro:: __VERSION__
+
+  This macro expands to a string constant which describes the version of
+  the compiler in use.  You should not rely on its contents having any
+  particular form, but it can be counted on to contain at least the
+  release number.
+
+.. c:macro:: __OPTIMIZE__
+             __OPTIMIZE_SIZE__
+             __NO_INLINE__
+
+  These macros describe the compilation mode.  ``__OPTIMIZE__`` is
+  defined in all optimizing compilations.  ``__OPTIMIZE_SIZE__`` is
+  defined if the compiler is optimizing for size, not speed.
+  ``__NO_INLINE__`` is defined if no functions will be inlined into
+  their callers (when not optimizing, or when inlining has been
+  specifically disabled by :option:`-fno-inline`).
+
+  These macros cause certain GNU header files to provide optimized
+  definitions, using macros or inline functions, of system library
+  functions.  You should not use these macros in any way unless you make
+  sure that programs will execute with the same effect whether or not they
+  are defined.  If they are defined, their value is 1.
+
+.. c:macro:: __GNUC_GNU_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled in GCC's traditional gnu90 mode.  Object files will contain
+  externally visible definitions of all functions declared ``inline``
+  without ``extern`` or ``static``.  They will not contain any
+  definitions of any functions declared ``extern inline``.
+
+.. c:macro:: __GNUC_STDC_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled according to the ISO C99 or later standards.  Object files will contain
+  externally visible definitions of all functions declared ``extern
+  inline``.  They will not contain definitions of any functions declared
+  ``inline`` without ``extern``.
+
+  If this macro is defined, GCC supports the ``gnu_inline`` function
+  attribute as a way to always get the gnu90 behavior.
+
+.. c:macro:: __CHAR_UNSIGNED__
+
+  GCC defines this macro if and only if the data type ``char`` is
+  unsigned on the target machine.  It exists to cause the standard header
+  file :samp:`limits.h` to work correctly.  You should not use this macro
+  yourself; instead, refer to the standard macros defined in :samp:`limits.h`.
+
+.. c:macro:: __WCHAR_UNSIGNED__
+
+  Like ``__CHAR_UNSIGNED__``, this macro is defined if and only if the
+  data type ``wchar_t`` is unsigned and the front-end is in C++ mode.
+
+.. c:macro:: __REGISTER_PREFIX__
+
+  This macro expands to a single token (not a string constant) which is
+  the prefix applied to CPU register names in assembly language for this
+  target.  You can use it to write assembly that is usable in multiple
+  environments.  For example, in the ``m68k-aout`` environment it
+  expands to nothing, but in the ``m68k-coff`` environment it expands
+  to a single :samp:`%`.
+
+.. c:macro:: __USER_LABEL_PREFIX__
+
+  This macro expands to a single token which is the prefix applied to
+  user labels (symbols visible to C code) in assembly.  For example, in
+  the ``m68k-aout`` environment it expands to an :samp:`_`, but in the
+  ``m68k-coff`` environment it expands to nothing.
+
+  This macro will have the correct definition even if
+  :option:`-f(no-)underscores` is in use, but it will not be correct if
+  target-specific options that adjust this prefix are used (e.g. the
+  OSF/rose :option:`-mno-underscores` option).
+
+.. c:macro:: __SIZE_TYPE__
+             __PTRDIFF_TYPE__
+             __WCHAR_TYPE__
+             __WINT_TYPE__
+             __INTMAX_TYPE__
+             __UINTMAX_TYPE__
+             __SIG_ATOMIC_TYPE__
+             __INT8_TYPE__
+             __INT16_TYPE__
+             __INT32_TYPE__
+             __INT64_TYPE__
+             __UINT8_TYPE__
+             __UINT16_TYPE__
+             __UINT32_TYPE__
+             __UINT64_TYPE__
+             __INT_LEAST8_TYPE__
+             __INT_LEAST16_TYPE__
+             __INT_LEAST32_TYPE__
+             __INT_LEAST64_TYPE__
+             __UINT_LEAST8_TYPE__
+             __UINT_LEAST16_TYPE__
+             __UINT_LEAST32_TYPE__
+             __UINT_LEAST64_TYPE__
+             __INT_FAST8_TYPE__
+             __INT_FAST16_TYPE__
+             __INT_FAST32_TYPE__
+             __INT_FAST64_TYPE__
+             __UINT_FAST8_TYPE__
+             __UINT_FAST16_TYPE__
+             __UINT_FAST32_TYPE__
+             __UINT_FAST64_TYPE__
+             __INTPTR_TYPE__
+             __UINTPTR_TYPE__
+
+  These macros are defined to the correct underlying types for the
+  ``size_t``, ``ptrdiff_t``, ``wchar_t``, ``wint_t``,
+  ``intmax_t``, ``uintmax_t``, ``sig_atomic_t``, ``int8_t``,
+  ``int16_t``, ``int32_t``, ``int64_t``, ``uint8_t``,
+  ``uint16_t``, ``uint32_t``, ``uint64_t``,
+  ``int_least8_t``, ``int_least16_t``, ``int_least32_t``,
+  ``int_least64_t``, ``uint_least8_t``, ``uint_least16_t``,
+  ``uint_least32_t``, ``uint_least64_t``, ``int_fast8_t``,
+  ``int_fast16_t``, ``int_fast32_t``, ``int_fast64_t``,
+  ``uint_fast8_t``, ``uint_fast16_t``, ``uint_fast32_t``,
+  ``uint_fast64_t``, ``intptr_t``, and ``uintptr_t`` typedefs,
+  respectively.  They exist to make the standard header files
+  :samp:`stddef.h`, :samp:`stdint.h`, and :samp:`wchar.h` work correctly.
+  You should not use these macros directly; instead, include the
+  appropriate headers and use the typedefs.  Some of these macros may
+  not be defined on particular systems if GCC does not provide a
+  :samp:`stdint.h` header on those systems.
+
+.. c:macro:: __CHAR_BIT__
+
+  Defined to the number of bits used in the representation of the
+  ``char`` data type.  It exists to make the standard header given
+  numerical limits work correctly.  You should not use
+  this macro directly; instead, include the appropriate headers.
+
+.. c:macro::[...]

[diff truncated at 524288 bytes]

[gcc(refs/users/marxin/heads/sphinx-final)] sphinx: copy files from texi2rst-generated repository

[Martin Liska]

https://gcc.gnu.org/g:7b4d9691208d293342e187fd1a77bab9448d9fa2

commit 7b4d9691208d293342e187fd1a77bab9448d9fa2
Author: Martin Liska <mliska@suse.cz>
Date:   Mon Nov 7 12:54:13 2022 +0100

    sphinx: copy files from texi2rst-generated repository
    
    ChangeLog:
    
            * doc/Makefile: New file.
            * doc/_static/custom.css: New file.
            * doc/baseconf.py: New file.
            * doc/bsd.rst: New file.
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            * doc/favicon.ico: New file.
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            * doc/gcc_sphinx.py: New file.
            * doc/gnu.rst: New file.
            * doc/gnu_free_documentation_license.rst: New file.
            * doc/gpl-3.0.rst: New file.
            * doc/indices-and-tables.rst: New file.
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            * doc/logo.pdf: New file.
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            * doc/md.rst: New file.
            * doc/requirements.txt: New file.
    
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            * doc/invoking-gdc/input-and-output-files.rst: New file.
            * doc/invoking-gdc/options-for-directory-search.rst: New file.
            * doc/invoking-gdc/options-for-linking.rst: New file.
            * doc/invoking-gdc/runtime-options.rst: New file.
            * doc/invoking-gdc/warnings.rst: New file.
    
    gcc/ChangeLog:
    
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            * doc/cpp/conditional-uses.rst: New file.
            * doc/cpp/conditionals.rst: New file.
            * doc/cpp/conf.py: New file.
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            * doc/cpp/environment-variables.rst: New file.
            * doc/cpp/gnu-free-documentation-license.rst: New file.
            * doc/cpp/header-files.rst: New file.
            * doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst: New file.
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            * doc/cpp/header-files/include-syntax.rst: New file.
            * doc/cpp/header-files/once-only-headers.rst: New file.
            * doc/cpp/header-files/search-path.rst: New file.
            * doc/cpp/header-files/system-headers.rst: New file.
            * doc/cpp/header-files/wrapper-headers.rst: New file.
            * doc/cpp/implementation-defined-behavior.rst: New file.
            * doc/cpp/implementation-details.rst: New file.
            * doc/cpp/implementation-limits.rst: New file.
            * doc/cpp/index.rst: New file.
            * doc/cpp/indices-and-tables.rst: New file.
            * doc/cpp/initial-processing.rst: New file.
            * doc/cpp/invocation.rst: New file.
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            * doc/cpp/macros.rst: New file.
            * doc/cpp/macros/concatenation.rst: New file.
            * doc/cpp/macros/directives-within-macro-arguments.rst: New file.
            * doc/cpp/macros/function-like-macros.rst: New file.
            * doc/cpp/macros/macro-arguments.rst: New file.
            * doc/cpp/macros/macro-pitfalls.rst: New file.
            * doc/cpp/macros/object-like-macros.rst: New file.
            * doc/cpp/macros/predefined-macros.rst: New file.
            * doc/cpp/macros/stringizing.rst: New file.
            * doc/cpp/macros/undefining-and-redefining-macros.rst: New file.
            * doc/cpp/macros/variadic-macros.rst: New file.
            * doc/cpp/obsolete-features.rst: New file.
            * doc/cpp/other-directives.rst: New file.
            * doc/cpp/overview.rst: New file.
            * doc/cpp/pragmas.rst: New file.
            * doc/cpp/preprocessor-output.rst: New file.
            * doc/cpp/the-preprocessing-language.rst: New file.
            * doc/cpp/tokenization.rst: New file.
            * doc/cpp/traditional-lexical-analysis.rst: New file.
            * doc/cpp/traditional-macros.rst: New file.
            * doc/cpp/traditional-miscellany.rst: New file.
            * doc/cpp/traditional-mode.rst: New file.
            * doc/cpp/traditional-warnings.rst: New file.
            * doc/cppinternals/conf.py: New file.
            * doc/cppinternals/copyright.rst: New file.
            * doc/cppinternals/cppinternals.rst: New file.
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            * doc/cppinternals/files.rst: New file.
            * doc/cppinternals/index.rst: New file.
            * doc/cppinternals/indices-and-tables.rst: New file.
            * doc/cppinternals/internal-representation-of-macros.rst: New file.
            * doc/cppinternals/just-which-line-number-anyway.rst: New file.
            * doc/cppinternals/lexing-a-line.rst: New file.
            * doc/cppinternals/lexing-a-token.rst: New file.
            * doc/cppinternals/looking-for-a-function-like-macros-opening-parenthesis.rst: New file.
            * doc/cppinternals/macro-expansion-overview.rst: New file.
            * doc/cppinternals/marking-tokens-ineligible-for-future-expansion.rst: New file.
            * doc/cppinternals/multiple-include-optimization.rst: New file.
            * doc/cppinternals/overview.rst: New file.
            * doc/cppinternals/representation-of-line-numbers.rst: New file.
            * doc/cppinternals/scanning-the-replacement-list-for-macros-to-expand.rst: New file.
            * doc/gcc/binary-compatibility.rst: New file.
            * doc/gcc/c++-implementation-defined-behavior.rst: New file.
            * doc/gcc/c-implementation-defined-behavior.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/architecture.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/arrays-and-pointers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/characters.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/declarators.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/environment.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/floating-point.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/hints.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/identifiers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/integers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/library-functions.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/locale-specific-behavior.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/preprocessing-directives.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/qualifiers.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/statements.rst: New file.
            * doc/gcc/c-implementation-defined-behavior/structures-unions-enumerations-and-bit-fields.rst:
            New file.
            * doc/gcc/c-implementation-defined-behavior/translation.rst: New file.
            * doc/gcc/conditionally-supported-behavior.rst: New file.
            * doc/gcc/conf.py: New file.
            * doc/gcc/contributing-to-gcc-development.rst: New file.
            * doc/gcc/contributors-to-gcc.rst: New file.
            * doc/gcc/copyright.rst: New file.
            * doc/gcc/exception-handling.rst: New file.
            * doc/gcc/extensions-to-the-c++-language.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/backwards-compatibility.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/c++-concepts.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/c++-interface-and-implementation-pragmas.rst:
            New file.
            * doc/gcc/extensions-to-the-c++-language/c++-specific-variable-function-and-type-attributes.rst:
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            * doc/gcc/extensions-to-the-c++-language/deprecated-features.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/extracting-the-function-pointer-from-a-bound-pointer-to-member-function.rst:
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            * doc/gcc/extensions-to-the-c++-language/function-multiversioning.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/restricting-pointer-aliasing.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/type-traits.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/vague-linkage.rst: New file.
            * doc/gcc/extensions-to-the-c++-language/when-is-a-volatile-c++-object-accessed.rst:
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            * doc/gcc/extensions-to-the-c++-language/wheres-the-template.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/128-bit-integers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/additional-floating-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/alternate-keywords.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/an-inline-function-is-as-fast-as-a-macro.rst:
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            * doc/gcc/extensions-to-the-c-language-family/arithmetic-on-void-and-function-pointers.rst:
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            * doc/gcc/extensions-to-the-c-language-family/arrays-of-length-zero.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/arrays-of-variable-length.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/attribute-syntax.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/binary-constants-using-the-0b-prefix.rst:
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            * doc/gcc/extensions-to-the-c-language-family/built-in-functions-for-memory-model-aware-atomic-operations.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/built-in-functions-to-perform-arithmetic-with-overflow-checking.rst:
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            * doc/gcc/extensions-to-the-c-language-family/c++-style-comments.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/case-ranges.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/cast-to-a-union-type.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/complex-numbers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/compound-literals.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/conditionals-with-omitted-operands.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/constructing-function-calls.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/decimal-floating-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/aarch64-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/amd-gcn-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/arc-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/arm-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/avr-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/blackfin-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/bpf-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/c-sky-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/common-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/epiphany-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/h8-300-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/ia-64-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32c-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32r-d-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m68k-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mcore-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mep-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microblaze-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microsoft-windows-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mips-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/msp430-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nds32-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nios-ii-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nvidia-ptx-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/powerpc-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/risc-v-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rl78-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rx-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/s-390-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/sh-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/symbian-os-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/v850-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/visium-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/x86-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/xstormy16-function-attributes.rst:
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            * doc/gcc/extensions-to-the-c-language-family/designated-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/determining-the-alignment-of-functions-types-or-variables.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/dollar-signs-in-identifier-names.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/double-word-integers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/enumerator-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/fixed-point-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/format-checks-specific-to-particular-target-machines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/function-names-as-strings.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/getting-the-return-or-frame-address-of-a-function.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/half-precision-floating-point.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/hex-floats.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/how-to-use-inline-assembly-language-in-c-code.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/incomplete-enum-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/label-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/labels-as-values.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/legacy-sync-built-in-functions-for-atomic-memory-access.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/locally-declared-labels.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/macros-with-a-variable-number-of-arguments.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/mixed-declarations-labels-and-code.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/named-address-spaces.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/nested-functions.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-constant-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-lvalue-arrays-may-have-subscripts.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/nonlocal-gotos.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/object-size-checking-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/other-built-in-functions-provided-by-gcc.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pointer-arguments-in-variadic-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pointers-to-arrays-with-qualifiers-work-as-expected.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pragmas-accepted-by-gcc.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/prototypes-and-old-style-function-definitions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/referring-to-a-type-with-typeof.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/slightly-looser-rules-for-escaped-newlines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-variables.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/statement-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/statements-and-declarations-in-expressions.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-armv8-m-security-extensions.rst:
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            * doc/gccint/gimple/tuple-specific-accessors/gimplereturn.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleswitch.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpletry.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplewithcleanupexpr.rst: New file.
            * doc/gccint/gnu-free-documentation-license.rst: New file.
            * doc/gccint/guidelines-for-diagnostics.rst: New file.
            * doc/gccint/guidelines-for-options.rst: New file.
            * doc/gccint/host-common.rst: New file.
            * doc/gccint/host-configuration.rst: New file.
            * doc/gccint/host-filesystem.rst: New file.
            * doc/gccint/host-makefile-fragments.rst: New file.
            * doc/gccint/host-misc.rst: New file.
            * doc/gccint/index.rst: New file.
            * doc/gccint/indices-and-tables.rst: New file.
            * doc/gccint/interfacing-to-gcc-output.rst: New file.
            * doc/gccint/introduction.rst: New file.
            * doc/gccint/language-front-ends-in-gcc.rst: New file.
            * doc/gccint/link-time-optimization.rst: New file.
            * doc/gccint/link-time-optimization/design-overview.rst: New file.
            * doc/gccint/link-time-optimization/internal-flags-controlling-lto1.rst: New file.
            * doc/gccint/link-time-optimization/lto-file-sections.rst: New file.
            * doc/gccint/link-time-optimization/using-summary-information-in-ipa-passes.rst: New file.
            * doc/gccint/link-time-optimization/whole-program-assumptions-linker-plugin-and-symbol-visibilities.rst:
            New file.
            * doc/gccint/machine-descriptions.rst: New file.
            * doc/gccint/machine-descriptions/c-statements-for-assembler-output.rst: New file.
            * doc/gccint/machine-descriptions/canonicalization-of-instructions.rst: New file.
            * doc/gccint/machine-descriptions/conditional-execution.rst: New file.
            * doc/gccint/machine-descriptions/constant-definitions.rst: New file.
            * doc/gccint/machine-descriptions/defining-how-to-split-instructions.rst: New file.
            * doc/gccint/machine-descriptions/defining-jump-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/defining-looping-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/defining-rtl-sequences-for-code-generation.rst: New file.
            * doc/gccint/machine-descriptions/everything-about-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/example-of-defineinsn.rst: New file.
            * doc/gccint/machine-descriptions/including-patterns-in-machine-descriptions.rst: New file.
            * doc/gccint/machine-descriptions/instruction-attributes.rst: New file.
            * doc/gccint/machine-descriptions/interdependence-of-patterns.rst: New file.
            * doc/gccint/machine-descriptions/iterators.rst: New file.
            * doc/gccint/machine-descriptions/machine-specific-peephole-optimizers.rst: New file.
            * doc/gccint/machine-descriptions/operand-constraints.rst: New file.
            * doc/gccint/machine-descriptions/output-templates-and-operand-substitution.rst: New file.
            * doc/gccint/machine-descriptions/overview-of-how-the-machine-description-is-used.rst:
            New file.
            * doc/gccint/machine-descriptions/predicates.rst: New file.
            * doc/gccint/machine-descriptions/rtl-template.rst: New file.
            * doc/gccint/machine-descriptions/rtl-templates-transformations.rst: New file.
            * doc/gccint/machine-descriptions/standard-pattern-names-for-generation.rst: New file.
            * doc/gccint/machine-descriptions/when-the-order-of-patterns-matters.rst: New file.
            * doc/gccint/makefile-fragments.rst: New file.
            * doc/gccint/match-and-simplify.rst: New file.
            * doc/gccint/memory-management-and-type-information.rst: New file.
            * doc/gccint/memory-management-and-type-information/how-to-invoke-the-garbage-collector.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/marking-roots-for-the-garbage-collector.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/source-files-containing-type-information.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/support-for-inheritance.rst: New file.
            * doc/gccint/memory-management-and-type-information/support-for-user-provided-gc-marking-routines.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/the-inside-of-a-gty.rst: New file.
            * doc/gccint/memory-management-and-type-information/troubleshooting-the-garbage-collector.rst:
            New file.
            * doc/gccint/option-file-format.rst: New file.
            * doc/gccint/option-properties.rst: New file.
            * doc/gccint/option-specification-files.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/gimplification-pass.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/inter-procedural-optimization-passes.rst:
            New file.
            * doc/gccint/passes-and-files-of-the-compiler/optimization-info.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/parsing-pass.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/pass-manager.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/rtl-passes.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/tree-ssa-passes.rst: New file.
            * doc/gccint/plugins.rst: New file.
            * doc/gccint/plugins/building-gcc-plugins.rst: New file.
            * doc/gccint/plugins/controlling-which-passes-are-being-run.rst: New file.
            * doc/gccint/plugins/giving-information-about-a-plugin.rst: New file.
            * doc/gccint/plugins/interacting-with-the-gcc-garbage-collector.rst: New file.
            * doc/gccint/plugins/interacting-with-the-pass-manager.rst: New file.
            * doc/gccint/plugins/keeping-track-of-available-passes.rst: New file.
            * doc/gccint/plugins/loading-plugins.rst: New file.
            * doc/gccint/plugins/plugin-api.rst: New file.
            * doc/gccint/plugins/recording-information-about-pass-execution.rst: New file.
            * doc/gccint/plugins/registering-custom-attributes-or-pragmas.rst: New file.
            * doc/gccint/rtl-representation.rst: New file.
            * doc/gccint/rtl-representation/access-to-operands.rst: New file.
            * doc/gccint/rtl-representation/access-to-special-operands.rst: New file.
            * doc/gccint/rtl-representation/assembler-instructions-as-expressions.rst: New file.
            * doc/gccint/rtl-representation/bit-fields.rst: New file.
            * doc/gccint/rtl-representation/comparison-operations.rst: New file.
            * doc/gccint/rtl-representation/constant-expression-types.rst: New file.
            * doc/gccint/rtl-representation/conversions.rst: New file.
            * doc/gccint/rtl-representation/declarations.rst: New file.
            * doc/gccint/rtl-representation/embedded-side-effects-on-addresses.rst: New file.
            * doc/gccint/rtl-representation/flags-in-an-rtl-expression.rst: New file.
            * doc/gccint/rtl-representation/insns.rst: New file.
            * doc/gccint/rtl-representation/machine-modes.rst: New file.
            * doc/gccint/rtl-representation/on-the-side-ssa-form-for-rtl.rst: New file.
            * doc/gccint/rtl-representation/reading-rtl.rst: New file.
            * doc/gccint/rtl-representation/registers-and-memory.rst: New file.
            * doc/gccint/rtl-representation/rtl-classes-and-formats.rst: New file.
            * doc/gccint/rtl-representation/rtl-expressions-for-arithmetic.rst: New file.
            * doc/gccint/rtl-representation/rtl-object-types.rst: New file.
            * doc/gccint/rtl-representation/rtl-representation-of-function-call-insns.rst: New file.
            * doc/gccint/rtl-representation/side-effect-expressions.rst: New file.
            * doc/gccint/rtl-representation/structure-sharing-assumptions.rst: New file.
            * doc/gccint/rtl-representation/variable-location-debug-information-in-rtl.rst: New file.
            * doc/gccint/rtl-representation/vector-operations.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/alignment-of-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/arithmetic-on-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/comparisons-involving-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/computing-bounds-on-polyints.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/consequences-of-using-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/converting-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/guidelines-for-using-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/miscellaneous-polyint-routines.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/overview-of-polyint.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/configure-terms-and-history.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-language-front-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-target-back-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/build-system-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/building-documentation.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/configuration-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/headers-installed-by-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/library-source-files-and-headers-under-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/makefile-targets.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/subdirectories-of-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/top-level-source-directory.rst:
            New file.
            * doc/gccint/standard-header-file-directories.rst: New file.
            * doc/gccint/static-analyzer.rst: New file.
            * doc/gccint/target-macros.rst: New file.
            * doc/gccint/target-macros/adding-support-for-named-address-spaces.rst: New file.
            * doc/gccint/target-macros/addressing-modes.rst: New file.
            * doc/gccint/target-macros/adjusting-the-instruction-scheduler.rst: New file.
            * doc/gccint/target-macros/anchored-addresses.rst: New file.
            * doc/gccint/target-macros/c++-abi-parameters.rst: New file.
            * doc/gccint/target-macros/condition-code-status.rst: New file.
            * doc/gccint/target-macros/controlling-debugging-information-format.rst: New file.
            * doc/gccint/target-macros/controlling-the-compilation-driver-gcc.rst: New file.
            * doc/gccint/target-macros/cross-compilation-and-floating-point.rst: New file.
            * doc/gccint/target-macros/d-abi-parameters.rst: New file.
            * doc/gccint/target-macros/defining-coprocessor-specifics-for-mips-targets.rst: New file.
            * doc/gccint/target-macros/defining-data-structures-for-per-function-information.rst:
            New file.
            * doc/gccint/target-macros/defining-target-specific-uses-of-attribute.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-alignment.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-exception-regions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/how-initialization-functions-are-handled.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/macros-controlling-initialization-routines.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-and-generation-of-labels.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-assembler-instructions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-data.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-dispatch-tables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-uninitialized-variables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/the-overall-framework-of-an-assembler-file.rst:
            New file.
            * doc/gccint/target-macros/describing-relative-costs-of-operations.rst: New file.
            * doc/gccint/target-macros/dividing-the-output-into-sections-texts-data.rst: New file.
            * doc/gccint/target-macros/emulating-tls.rst: New file.
            * doc/gccint/target-macros/implementing-the-varargs-macros.rst: New file.
            * doc/gccint/target-macros/implicit-calls-to-library-routines.rst: New file.
            * doc/gccint/target-macros/layout-of-source-language-data-types.rst: New file.
            * doc/gccint/target-macros/miscellaneous-parameters.rst: New file.
            * doc/gccint/target-macros/mode-switching-instructions.rst: New file.
            * doc/gccint/target-macros/parameters-for-precompiled-header-validity-checking.rst:
            New file.
            * doc/gccint/target-macros/position-independent-code.rst: New file.
            * doc/gccint/target-macros/register-classes.rst: New file.
            * doc/gccint/target-macros/register-usage.rst: New file.
            * doc/gccint/target-macros/run-time-target-specification.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/basic-stack-layout.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/caller-saves-register-allocation.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/eliminating-frame-pointer-and-arg-pointer.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/exception-handling-support.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/function-entry-and-exit.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/generating-code-for-profiling.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-large-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-scalar-function-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/miscellaneous-register-hooks.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-arguments-in-registers.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-function-arguments-on-the-stack.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/permitting-tail-calls.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/registers-that-address-the-stack-frame.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/shrink-wrapping-separate-components.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/specifying-how-stack-checking-is-done.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/stack-smashing-protection.rst:
            New file.
            * doc/gccint/target-macros/storage-layout.rst: New file.
            * doc/gccint/target-macros/support-for-nested-functions.rst: New file.
            * doc/gccint/target-macros/the-global-targetm-variable.rst: New file.
            * doc/gccint/target-makefile-fragments.rst: New file.
            * doc/gccint/testsuites.rst: New test.
            * doc/gccint/testsuites/ada-language-testsuites.rst: New test.
            * doc/gccint/testsuites/c-language-testsuites.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/commands-for-use-in-dg-final.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/features-for-dg-add-options.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/keywords-describing-target-attributes.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/selecting-targets-to-which-a-test-applies.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/syntax-and-descriptions-of-test-directives.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/variants-of-dg-require-support.rst:
            New test.
            * doc/gccint/testsuites/idioms-used-in-testsuite-code.rst: New test.
            * doc/gccint/testsuites/support-for-testing-binary-compatibility.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gcov.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gimple-passes.rst: New test.
            * doc/gccint/testsuites/support-for-testing-link-time-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-profile-directed-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-rtl-passes.rst: New test.
            * doc/gccint/testsuites/support-for-torture-testing-using-multiple-options.rst: New test.
            * doc/gccint/the-gcc-low-level-runtime-library.rst: New file.
            * doc/gccint/the-gcc-low-level-runtime-library/language-independent-routines-for-exception-handling.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/miscellaneous-runtime-library-routines.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-decimal-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-fixed-point-fractional-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-integer-arithmetic.rst:
            New file.
            * doc/gccint/the-language.rst: New file.
            * doc/gccint/user-experience-guidelines.rst: New file.
            * doc/install/binaries.rst: New file.
            * doc/install/building.rst: New file.
            * doc/install/building/building-a-cross-compiler.rst: New file.
            * doc/install/building/building-a-native-compiler.rst: New file.
            * doc/install/building/building-in-parallel.rst: New file.
            * doc/install/building/building-the-ada-compiler.rst: New file.
            * doc/install/building/building-the-d-compiler.rst: New file.
            * doc/install/building/building-with-profile-feedback.rst: New file.
            * doc/install/conf.py: New file.
            * doc/install/configuration.rst: New file.
            * doc/install/copyright.rst: New file.
            * doc/install/downloading-gcc.rst: New file.
            * doc/install/final-installation.rst: New file.
            * doc/install/gnu-free-documentation-license.rst: New file.
            * doc/install/host-target-specific-installation-notes-for-gcc.rst: New file.
            * doc/install/how-can-you-run-the-testsuite-on-selected-tests.rst: New test.
            * doc/install/how-to-interpret-test-results.rst: New file.
            * doc/install/index.rst: New file.
            * doc/install/indices-and-tables.rst: New file.
            * doc/install/installing-gcc.rst: New file.
            * doc/install/passing-options-and-running-multiple-testsuites.rst: New test.
            * doc/install/prerequisites.rst: New file.
            * doc/install/submitting-test-results.rst: New file.
            * doc/install/testing.rst: New file.
    
    gcc/fortran/ChangeLog:
    
            * doc/gfc-internals/code-that-interacts-with-the-user.rst: New file.
            * doc/gfc-internals/command-line-options.rst: New file.
            * doc/gfc-internals/conf.py: New file.
            * doc/gfc-internals/copyright.rst: New file.
            * doc/gfc-internals/error-handling.rst: New file.
            * doc/gfc-internals/frontend-data-structures.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/accessing-declarations.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/basic-data-structures.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/converting-expressions-to-tree.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/translating-statements.rst:
            New file.
            * doc/gfc-internals/gfccode.rst: New file.
            * doc/gfc-internals/gfcexpr.rst: New file.
            * doc/gfc-internals/gnu-free-documentation-license.rst: New file.
            * doc/gfc-internals/index.rst: New file.
            * doc/gfc-internals/indices-and-tables.rst: New file.
            * doc/gfc-internals/internals-of-fortran-2003-oop-features.rst: New file.
            * doc/gfc-internals/introduction.rst: New file.
            * doc/gfc-internals/symbol-versioning.rst: New file.
            * doc/gfc-internals/the-libgfortran-runtime-library.rst: New file.
            * doc/gfc-internals/type-bound-operators.rst: New file.
            * doc/gfc-internals/type-bound-procedures.rst: New file.
            * doc/gfortran/about-gnu-fortran.rst: New file.
            * doc/gfortran/coarray-programming.rst: New file.
            * doc/gfortran/compiler-characteristics.rst: New file.
            * doc/gfortran/compiler-characteristics/asynchronous-i-o.rst: New file.
            * doc/gfortran/compiler-characteristics/data-consistency-and-durability.rst: New file.
            * doc/gfortran/compiler-characteristics/evaluation-of-logical-expressions.rst: New file.
            * doc/gfortran/compiler-characteristics/file-format-of-unformatted-sequential-files.rst:
            New file.
            * doc/gfortran/compiler-characteristics/file-operations-on-symbolic-links.rst: New file.
            * doc/gfortran/compiler-characteristics/files-opened-without-an-explicit-action=-specifier.rst:
            New file.
            * doc/gfortran/compiler-characteristics/internal-representation-of-logical-variables.rst:
            New file.
            * doc/gfortran/compiler-characteristics/kind-type-parameters.rst: New file.
            * doc/gfortran/compiler-characteristics/max-and-min-intrinsics-with-real-nan-arguments.rst:
            New file.
            * doc/gfortran/compiler-characteristics/thread-safety-of-the-runtime-library.rst: New file.
            * doc/gfortran/conf.py: New file.
            * doc/gfortran/contributing.rst: New file.
            * doc/gfortran/contributors-to-gnu-fortran.rst: New file.
            * doc/gfortran/copyright.rst: New file.
            * doc/gfortran/extensions-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions-not-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions.rst: New file.
            * doc/gfortran/function-abi-documentation.rst: New file.
            * doc/gfortran/funding.rst: New file.
            * doc/gfortran/general-public-license-3.rst: New file.
            * doc/gfortran/gnu-fortran-and-gcc.rst: New file.
            * doc/gfortran/gnu-fortran-command-options.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/description.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/enable-and-customize-preprocessing.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/environment-variables-affecting-gfortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-runtime-behavior.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-the-linking-step.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/option-summary.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-controlling-fortran-dialect.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-code-generation-conventions.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-debugging-your-program-or-gnu-fortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-directory-search.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-interoperability-with-other-languages.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-to-request-or-suppress-errors-and-warnings.rst:
            New file.
            * doc/gfortran/gnu-fortran-compiler-directives.rst: New file.
            * doc/gfortran/gnu-free-documentation-license.rst: New file.
            * doc/gfortran/index.rst: New file.
            * doc/gfortran/indices-and-tables.rst: New file.
            * doc/gfortran/interoperability-with-c.rst: New file.
            * doc/gfortran/intrinsic-modules.rst: New file.
            * doc/gfortran/intrinsic-modules/ieee-modules-ieeeexceptions-ieeearithmetic-and-ieeefeatures.rst:
            New file.
            * doc/gfortran/intrinsic-modules/isocbinding.rst: New file.
            * doc/gfortran/intrinsic-modules/isofortranenv.rst: New file.
            * doc/gfortran/intrinsic-modules/openacc-module-openacc.rst: New file.
            * doc/gfortran/intrinsic-modules/openmp-modules-omplib-and-omplibkinds.rst: New file.
            * doc/gfortran/intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/abort.rst: New file.
            * doc/gfortran/intrinsic-procedures/abs.rst: New file.
            * doc/gfortran/intrinsic-procedures/access.rst: New file.
            * doc/gfortran/intrinsic-procedures/achar.rst: New file.
            * doc/gfortran/intrinsic-procedures/acos.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustl.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustr.rst: New file.
            * doc/gfortran/intrinsic-procedures/aimag.rst: New file.
            * doc/gfortran/intrinsic-procedures/aint.rst: New file.
            * doc/gfortran/intrinsic-procedures/alarm.rst: New file.
            * doc/gfortran/intrinsic-procedures/all.rst: New file.
            * doc/gfortran/intrinsic-procedures/allocated.rst: New file.
            * doc/gfortran/intrinsic-procedures/and.rst: New file.
            * doc/gfortran/intrinsic-procedures/anint.rst: New file.
            * doc/gfortran/intrinsic-procedures/any.rst: New file.
            * doc/gfortran/intrinsic-procedures/asin.rst: New file.
            * doc/gfortran/intrinsic-procedures/asind.rst: New file.
            * doc/gfortran/intrinsic-procedures/asinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/associated.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2d.rst: New file.
            * doc/gfortran/intrinsic-procedures/atand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomiccas.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicdefine.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicref.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/backtrace.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj0.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besseljn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely0.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselyn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bge.rst: New file.
            * doc/gfortran/intrinsic-procedures/bgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/bitsize.rst: New file.
            * doc/gfortran/intrinsic-procedures/ble.rst: New file.
            * doc/gfortran/intrinsic-procedures/blt.rst: New file.
            * doc/gfortran/intrinsic-procedures/btest.rst: New file.
            * doc/gfortran/intrinsic-procedures/cassociated.rst: New file.
            * doc/gfortran/intrinsic-procedures/ceiling.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfprocpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfunloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/char.rst: New file.
            * doc/gfortran/intrinsic-procedures/chdir.rst: New file.
            * doc/gfortran/intrinsic-procedures/chmod.rst: New file.
            * doc/gfortran/intrinsic-procedures/cloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/cmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/cobroadcast.rst: New file.
            * doc/gfortran/intrinsic-procedures/comax.rst: New file.
            * doc/gfortran/intrinsic-procedures/comin.rst: New file.
            * doc/gfortran/intrinsic-procedures/commandargumentcount.rst: New file.
            * doc/gfortran/intrinsic-procedures/compileroptions.rst: New file.
            * doc/gfortran/intrinsic-procedures/compilerversion.rst: New file.
            * doc/gfortran/intrinsic-procedures/complex.rst: New file.
            * doc/gfortran/intrinsic-procedures/conjg.rst: New file.
            * doc/gfortran/intrinsic-procedures/coreduce.rst: New file.
            * doc/gfortran/intrinsic-procedures/cos.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosum.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotan.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotand.rst: New file.
            * doc/gfortran/intrinsic-procedures/count.rst: New file.
            * doc/gfortran/intrinsic-procedures/cputime.rst: New file.
            * doc/gfortran/intrinsic-procedures/cshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/csizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/ctime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dateandtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dble.rst: New file.
            * doc/gfortran/intrinsic-procedures/dcmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/digits.rst: New file.
            * doc/gfortran/intrinsic-procedures/dim.rst: New file.
            * doc/gfortran/intrinsic-procedures/dotproduct.rst: New file.
            * doc/gfortran/intrinsic-procedures/dprod.rst: New file.
            * doc/gfortran/intrinsic-procedures/dreal.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/dtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eoshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/epsilon.rst: New file.
            * doc/gfortran/intrinsic-procedures/erf.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfc.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfcscaled.rst: New file.
            * doc/gfortran/intrinsic-procedures/etime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eventquery.rst: New file.
            * doc/gfortran/intrinsic-procedures/executecommandline.rst: New file.
            * doc/gfortran/intrinsic-procedures/exit.rst: New file.
            * doc/gfortran/intrinsic-procedures/exp.rst: New file.
            * doc/gfortran/intrinsic-procedures/exponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/extendstypeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/fdate.rst: New file.
            * doc/gfortran/intrinsic-procedures/fget.rst: New file.
            * doc/gfortran/intrinsic-procedures/fgetc.rst: New file.
            * doc/gfortran/intrinsic-procedures/findloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/floor.rst: New file.
            * doc/gfortran/intrinsic-procedures/flush.rst: New file.
            * doc/gfortran/intrinsic-procedures/fnum.rst: New file.
            * doc/gfortran/intrinsic-procedures/fput.rst: New file.
            * doc/gfortran/intrinsic-procedures/fputc.rst: New file.
            * doc/gfortran/intrinsic-procedures/fraction.rst: New file.
            * doc/gfortran/intrinsic-procedures/free.rst: New file.
            * doc/gfortran/intrinsic-procedures/fseek.rst: New file.
            * doc/gfortran/intrinsic-procedures/fstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ftell.rst: New file.
            * doc/gfortran/intrinsic-procedures/gamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/gerror.rst: New file.
            * doc/gfortran/intrinsic-procedures/getarg.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommand.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommandargument.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcwd.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenv.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenvironmentvariable.rst: New file.
            * doc/gfortran/intrinsic-procedures/getgid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getlog.rst: New file.
            * doc/gfortran/intrinsic-procedures/getpid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getuid.rst: New file.
            * doc/gfortran/intrinsic-procedures/gmtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/hostnm.rst: New file.
            * doc/gfortran/intrinsic-procedures/huge.rst: New file.
            * doc/gfortran/intrinsic-procedures/hypot.rst: New file.
            * doc/gfortran/intrinsic-procedures/iachar.rst: New file.
            * doc/gfortran/intrinsic-procedures/iall.rst: New file.
            * doc/gfortran/intrinsic-procedures/iand.rst: New file.
            * doc/gfortran/intrinsic-procedures/iany.rst: New file.
            * doc/gfortran/intrinsic-procedures/iargc.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibclr.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibits.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibset.rst: New file.
            * doc/gfortran/intrinsic-procedures/ichar.rst: New file.
            * doc/gfortran/intrinsic-procedures/idate.rst: New file.
            * doc/gfortran/intrinsic-procedures/ieor.rst: New file.
            * doc/gfortran/intrinsic-procedures/ierrno.rst: New file.
            * doc/gfortran/intrinsic-procedures/imageindex.rst: New file.
            * doc/gfortran/intrinsic-procedures/index.rst: New file.
            * doc/gfortran/intrinsic-procedures/int.rst: New file.
            * doc/gfortran/intrinsic-procedures/int2.rst: New file.
            * doc/gfortran/intrinsic-procedures/int8.rst: New file.
            * doc/gfortran/intrinsic-procedures/introduction-to-intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/ior.rst: New file.
            * doc/gfortran/intrinsic-procedures/iparity.rst: New file.
            * doc/gfortran/intrinsic-procedures/irand.rst: New file.
            * doc/gfortran/intrinsic-procedures/isatty.rst: New file.
            * doc/gfortran/intrinsic-procedures/iscontiguous.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishft.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishftc.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostatend.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostateor.rst: New file.
            * doc/gfortran/intrinsic-procedures/isnan.rst: New file.
            * doc/gfortran/intrinsic-procedures/itime.rst: New file.
            * doc/gfortran/intrinsic-procedures/kill.rst: New file.
            * doc/gfortran/intrinsic-procedures/kind.rst: New file.
            * doc/gfortran/intrinsic-procedures/lbound.rst: New file.
            * doc/gfortran/intrinsic-procedures/lcobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/leadz.rst: New file.
            * doc/gfortran/intrinsic-procedures/len.rst: New file.
            * doc/gfortran/intrinsic-procedures/lentrim.rst: New file.
            * doc/gfortran/intrinsic-procedures/lge.rst: New file.
            * doc/gfortran/intrinsic-procedures/lgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/link.rst: New file.
            * doc/gfortran/intrinsic-procedures/lle.rst: New file.
            * doc/gfortran/intrinsic-procedures/llt.rst: New file.
            * doc/gfortran/intrinsic-procedures/lnblnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/loc.rst: New file.
            * doc/gfortran/intrinsic-procedures/log.rst: New file.
            * doc/gfortran/intrinsic-procedures/log10.rst: New file.
            * doc/gfortran/intrinsic-procedures/loggamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/logical.rst: New file.
            * doc/gfortran/intrinsic-procedures/lshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/lstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ltime.rst: New file.
            * doc/gfortran/intrinsic-procedures/malloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskl.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskr.rst: New file.
            * doc/gfortran/intrinsic-procedures/matmul.rst: New file.
            * doc/gfortran/intrinsic-procedures/max.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock8.rst: New file.
            * doc/gfortran/intrinsic-procedures/merge.rst: New file.
            * doc/gfortran/intrinsic-procedures/mergebits.rst: New file.
            * doc/gfortran/intrinsic-procedures/min.rst: New file.
            * doc/gfortran/intrinsic-procedures/minexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/minloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/minval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mod.rst: New file.
            * doc/gfortran/intrinsic-procedures/modulo.rst: New file.
            * doc/gfortran/intrinsic-procedures/movealloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/mvbits.rst: New file.
            * doc/gfortran/intrinsic-procedures/nearest.rst: New file.
            * doc/gfortran/intrinsic-procedures/newline.rst: New file.
            * doc/gfortran/intrinsic-procedures/nint.rst: New file.
            * doc/gfortran/intrinsic-procedures/norm2.rst: New file.
            * doc/gfortran/intrinsic-procedures/not.rst: New file.
            * doc/gfortran/intrinsic-procedures/null.rst: New file.
            * doc/gfortran/intrinsic-procedures/numimages.rst: New file.
            * doc/gfortran/intrinsic-procedures/or.rst: New file.
            * doc/gfortran/intrinsic-procedures/pack.rst: New file.
            * doc/gfortran/intrinsic-procedures/parity.rst: New file.
            * doc/gfortran/intrinsic-procedures/perror.rst: New file.
            * doc/gfortran/intrinsic-procedures/popcnt.rst: New file.
            * doc/gfortran/intrinsic-procedures/poppar.rst: New file.
            * doc/gfortran/intrinsic-procedures/precision.rst: New file.
            * doc/gfortran/intrinsic-procedures/present.rst: New file.
            * doc/gfortran/intrinsic-procedures/product.rst: New file.
            * doc/gfortran/intrinsic-procedures/radix.rst: New file.
            * doc/gfortran/intrinsic-procedures/ran.rst: New file.
            * doc/gfortran/intrinsic-procedures/rand.rst: New file.
            * doc/gfortran/intrinsic-procedures/randominit.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomnumber.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomseed.rst: New file.
            * doc/gfortran/intrinsic-procedures/range.rst: New file.
            * doc/gfortran/intrinsic-procedures/rank.rst: New file.
            * doc/gfortran/intrinsic-procedures/real.rst: New file.
            * doc/gfortran/intrinsic-procedures/rename.rst: New file.
            * doc/gfortran/intrinsic-procedures/repeat.rst: New file.
            * doc/gfortran/intrinsic-procedures/reshape.rst: New file.
            * doc/gfortran/intrinsic-procedures/rrspacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/rshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/sametypeas.rst: New file.
            * doc/gfortran/intrinsic-procedures/scale.rst: New file.
            * doc/gfortran/intrinsic-procedures/scan.rst: New file.
            * doc/gfortran/intrinsic-procedures/secnds.rst: New file.
            * doc/gfortran/intrinsic-procedures/second.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedcharkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedintkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedrealkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/setexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/shape.rst: New file.
            * doc/gfortran/intrinsic-procedures/shifta.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/sign.rst: New file.
            * doc/gfortran/intrinsic-procedures/signal.rst: New file.
            * doc/gfortran/intrinsic-procedures/sin.rst: New file.
            * doc/gfortran/intrinsic-procedures/sind.rst: New file.
            * doc/gfortran/intrinsic-procedures/sinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/size.rst: New file.
            * doc/gfortran/intrinsic-procedures/sizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/sleep.rst: New file.
            * doc/gfortran/intrinsic-procedures/spacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/spread.rst: New file.
            * doc/gfortran/intrinsic-procedures/sqrt.rst: New file.
            * doc/gfortran/intrinsic-procedures/srand.rst: New file.
            * doc/gfortran/intrinsic-procedures/stat.rst: New file.
            * doc/gfortran/intrinsic-procedures/storagesize.rst: New file.
            * doc/gfortran/intrinsic-procedures/sum.rst: New file.
            * doc/gfortran/intrinsic-procedures/symlnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/system.rst: New file.
            * doc/gfortran/intrinsic-procedures/systemclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/tan.rst: New file.
            * doc/gfortran/intrinsic-procedures/tand.rst: New file.
            * doc/gfortran/intrinsic-procedures/tanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/thisimage.rst: New file.
            * doc/gfortran/intrinsic-procedures/time.rst: New file.
            * doc/gfortran/intrinsic-procedures/time8.rst: New file.
            * doc/gfortran/intrinsic-procedures/tiny.rst: New file.
            * doc/gfortran/intrinsic-procedures/trailz.rst: New file.
            * doc/gfortran/intrinsic-procedures/transfer.rst: New file.
            * doc/gfortran/intrinsic-procedures/transpose.rst: New file.
            * doc/gfortran/intrinsic-procedures/trim.rst: New file.
            * doc/gfortran/intrinsic-procedures/ttynam.rst: New file.
            * doc/gfortran/intrinsic-procedures/ubound.rst: New file.
            * doc/gfortran/intrinsic-procedures/ucobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/umask.rst: New file.
            * doc/gfortran/intrinsic-procedures/unlink.rst: New file.
            * doc/gfortran/intrinsic-procedures/unpack.rst: New file.
            * doc/gfortran/intrinsic-procedures/verify.rst: New file.
            * doc/gfortran/intrinsic-procedures/xor.rst: New file.
            * doc/gfortran/introduction.rst: New file.
            * doc/gfortran/mixed-language-programming.rst: New file.
            * doc/gfortran/naming-and-argument-passing-conventions.rst: New file.
            * doc/gfortran/non-fortran-main-program.rst: New file.
            * doc/gfortran/projects.rst: New file.
            * doc/gfortran/runtime.rst: New file.
            * doc/gfortran/runtime/gfortranconvertunit.rst: New file.
            * doc/gfortran/runtime/gfortranerrorbacktrace.rst: New file.
            * doc/gfortran/runtime/gfortranformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/gfortranlistseparator.rst: New file.
            * doc/gfortran/runtime/gfortranoptionalplus.rst: New file.
            * doc/gfortran/runtime/gfortranshowlocus.rst: New file.
            * doc/gfortran/runtime/gfortranstderrunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdinunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdoutunit.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedall.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedpreconnected.rst: New file.
            * doc/gfortran/runtime/gfortranunformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/tmpdir.rst: New file.
            * doc/gfortran/standards.rst: New file.
            * doc/gfortran/type-and-enum-abi-documentation.rst: New file.
    
    gcc/go/ChangeLog:
    
            * doc/c-interoperability.rst: New file.
            * doc/c-type-interoperability.rst: New file.
            * doc/compiler-directives.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/function-names.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/import-and-export.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/invoking-gccgo.rst: New file.
    
    libgomp/ChangeLog:
    
            * doc/amd-radeon-gcn.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/cuda-streams-usage.rst: New file.
            * doc/enabling-openacc.rst: New file.
            * doc/enabling-openmp.rst: New file.
            * doc/first-invocation-nvidia-cublas-library-api.rst: New file.
            * doc/first-invocation-openacc-library-api.rst: New file.
            * doc/funding.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/implementation-status-and-implementation-defined-behavior.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/memory-allocation-with-libmemkind.rst: New file.
            * doc/nvptx.rst: New file.
            * doc/offload-target-specifics.rst: New file.
            * doc/openacc-environment-variables.rst: New file.
            * doc/openacc-environment-variables/accdevicenum.rst: New file.
            * doc/openacc-environment-variables/accdevicetype.rst: New file.
            * doc/openacc-environment-variables/accproflib.rst: New file.
            * doc/openacc-environment-variables/gccaccnotify.rst: New file.
            * doc/openacc-introduction.rst: New file.
            * doc/openacc-library-and-environment-variables.rst: New file.
            * doc/openacc-library-interoperability.rst: New file.
            * doc/openacc-profiling-interface.rst: New file.
            * doc/openacc-runtime-library-routines.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctest.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctestall.rst: New file.
            * doc/openacc-runtime-library-routines/accattach.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyin.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyout.rst: New file.
            * doc/openacc-runtime-library-routines/acccreate.rst: New file.
            * doc/openacc-runtime-library-routines/accdelete.rst: New file.
            * doc/openacc-runtime-library-routines/accdetach.rst: New file.
            * doc/openacc-runtime-library-routines/accdeviceptr.rst: New file.
            * doc/openacc-runtime-library-routines/accfree.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudacontext.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudadevice.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accgetnumdevices.rst: New file.
            * doc/openacc-runtime-library-routines/accgetproperty.rst: New file.
            * doc/openacc-runtime-library-routines/acchostptr.rst: New file.
            * doc/openacc-runtime-library-routines/accinit.rst: New file.
            * doc/openacc-runtime-library-routines/accispresent.rst: New file.
            * doc/openacc-runtime-library-routines/accmalloc.rst: New file.
            * doc/openacc-runtime-library-routines/accmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpyfromdevice.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpytodevice.rst: New file.
            * doc/openacc-runtime-library-routines/accondevice.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcopyin.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcreate.rst: New file.
            * doc/openacc-runtime-library-routines/accproflookup.rst: New file.
            * doc/openacc-runtime-library-routines/accprofregister.rst: New file.
            * doc/openacc-runtime-library-routines/accprofunregister.rst: New file.
            * doc/openacc-runtime-library-routines/accregisterlibrary.rst: New file.
            * doc/openacc-runtime-library-routines/accsetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accshutdown.rst: New file.
            * doc/openacc-runtime-library-routines/accunmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accupdatedevice.rst: New file.
            * doc/openacc-runtime-library-routines/accupdateself.rst: New file.
            * doc/openacc-runtime-library-routines/accwait.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitall.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitallasync.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitasync.rst: New file.
            * doc/openmp-context-selectors.rst: New file.
            * doc/openmp-environment-variables.rst: New file.
            * doc/openmp-environment-variables/gompcpuaffinity.rst: New file.
            * doc/openmp-environment-variables/gompdebug.rst: New file.
            * doc/openmp-environment-variables/gomprtemsthreadpools.rst: New file.
            * doc/openmp-environment-variables/gompspincount.rst: New file.
            * doc/openmp-environment-variables/gompstacksize.rst: New file.
            * doc/openmp-environment-variables/ompcancellation.rst: New file.
            * doc/openmp-environment-variables/ompdefaultdevice.rst: New file.
            * doc/openmp-environment-variables/ompdisplayenv.rst: New file.
            * doc/openmp-environment-variables/ompdynamic.rst: New file.
            * doc/openmp-environment-variables/ompmaxactivelevels.rst: New file.
            * doc/openmp-environment-variables/ompmaxtaskpriority.rst: New file.
            * doc/openmp-environment-variables/ompnested.rst: New file.
            * doc/openmp-environment-variables/ompnumteams.rst: New file.
            * doc/openmp-environment-variables/ompnumthreads.rst: New file.
            * doc/openmp-environment-variables/ompplaces.rst: New file.
            * doc/openmp-environment-variables/ompprocbind.rst: New file.
            * doc/openmp-environment-variables/ompschedule.rst: New file.
            * doc/openmp-environment-variables/ompstacksize.rst: New file.
            * doc/openmp-environment-variables/omptargetoffload.rst: New file.
            * doc/openmp-environment-variables/ompteamsthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompwaitpolicy.rst: New file.
            * doc/openmp-implementation-specifics.rst: New file.
            * doc/openmp-implementation-status.rst: New file.
            * doc/openmp-implementation-status/openmp-45.rst: New file.
            * doc/openmp-implementation-status/openmp-50.rst: New file.
            * doc/openmp-implementation-status/openmp-51.rst: New file.
            * doc/openmp-implementation-status/openmp-52.rst: New file.
            * doc/openmp-runtime-library-routines.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroylock.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroynestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompfulfillevent.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetactivelevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetancestorthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetcancellation.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdevicenum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetlevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxtaskpriority.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumdevices.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumprocs.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetprocbind.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetsupportedactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsize.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtick.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtime.rst: New file.
            * doc/openmp-runtime-library-routines/ompinfinal.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinparallel.rst: New file.
            * doc/openmp-runtime-library-routines/ompisinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/omptestlock.rst: New file.
            * doc/openmp-runtime-library-routines/omptestnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetnestlock.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/the-libgomp-abi.rst: New file.
            * doc/the-libgomp-abi/implementing-atomic-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-barrier-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-critical-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-firstprivate-lastprivate-copyin-and-copyprivate-clauses.rst:
            New file.
            * doc/the-libgomp-abi/implementing-flush-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-for-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-master-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-openaccs-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-ordered-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-private-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-reduction-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-sections-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-single-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-threadprivate-construct.rst: New file.
    
    libiberty/ChangeLog:
    
            * doc/bsd.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/extensions.rst: New file.
            * doc/function-variable-and-macro-listing.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/lesser-general-public-license-2.1.rst: New file.
            * doc/overview.rst: New file.
            * doc/replacement-functions.rst: New file.
            * doc/supplemental-functions.rst: New file.
            * doc/using.rst: New file.
    
    libitm/ChangeLog:
    
            * doc/c-c++-language-constructs-for-tm.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/enabling-libitm.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/internals.rst: New file.
            * doc/locking-conventions.rst: New file.
            * doc/nesting-flat-vs-closed.rst: New file.
            * doc/the-libitm-abi.rst: New file.
            * doc/the-libitm-abi/function-list.rst: New file.
            * doc/the-libitm-abi/future-enhancements-to-the-abi.rst: New file.
            * doc/the-libitm-abi/library-design-principles.rst: New file.
            * doc/the-libitm-abi/memory-model.rst: New file.
            * doc/the-libitm-abi/non-objectives.rst: New file.
            * doc/the-libitm-abi/objectives.rst: New file.
            * doc/the-libitm-abi/sample-code.rst: New file.
            * doc/the-libitm-abi/types-and-macros-list.rst: New file.
            * doc/tm-methods-and-method-groups.rst: New file.
    
    libquadmath/ChangeLog:
    
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/i-o-library-routines.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/math-library-routines.rst: New file.
            * doc/quadmathsnprintf.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/strtoflt128.rst: New file.
            * doc/typedef-and-constants.rst: New file.

Diff:
---
 doc/Makefile                                       |   97 +
 doc/_static/custom.css                             |   11 +
 doc/baseconf.py                                    |  230 +
 doc/bsd.rst                                        |   39 +
 doc/contrib.rst                                    | 1273 +++++
 doc/contribute.rst                                 |   21 +
 doc/cppdiropts.rst                                 |  217 +
 doc/cppenv.rst                                     |   97 +
 doc/cppopts.rst                                    |  556 +++
 doc/cppwarnopts.rst                                |    4 +
 doc/favicon.ico                                    |  Bin 0 -> 766 bytes
 doc/funding.rst                                    |   47 +
 doc/gcc_sphinx.py                                  |   44 +
 doc/gnu.rst                                        |   19 +
 doc/gnu_free_documentation_license.rst             |  476 ++
 doc/gpl-3.0.rst                                    |  707 +++
 doc/indices-and-tables.rst                         |   13 +
 doc/lgpl-2.1.rst                                   |  514 +++
 doc/logo.pdf                                       |  Bin 0 -> 8978 bytes
 doc/logo.svg                                       |  108 +
 doc/md.rst                                         | 3142 +++++++++++++
 doc/requirements.txt                               |    3 +
 gcc/d/doc/conf.py                                  |   30 +
 gcc/d/doc/copyright.rst                            |   13 +
 gcc/d/doc/general-public-license-3.rst             |    6 +
 gcc/d/doc/gnu-free-documentation-license.rst       |    6 +
 gcc/d/doc/index.rst                                |   22 +
 gcc/d/doc/indices-and-tables.rst                   |    1 +
 gcc/d/doc/invoking-gdc.rst                         |   48 +
 gcc/d/doc/invoking-gdc/code-generation.rst         |  170 +
 gcc/d/doc/invoking-gdc/developer-options.rst       |   31 +
 gcc/d/doc/invoking-gdc/input-and-output-files.rst  |   45 +
 .../invoking-gdc/options-for-directory-search.rst  |   92 +
 gcc/d/doc/invoking-gdc/options-for-linking.rst     |   59 +
 gcc/d/doc/invoking-gdc/runtime-options.rst         |  314 ++
 gcc/d/doc/invoking-gdc/warnings.rst                |  148 +
 gcc/doc/cpp/character-sets.rst                     |   56 +
 gcc/doc/cpp/conditional-syntax.rst                 |  411 ++
 gcc/doc/cpp/conditional-uses.rst                   |   32 +
 gcc/doc/cpp/conditionals.rst                       |   44 +
 gcc/doc/cpp/conf.py                                |   30 +
 gcc/doc/cpp/copyright.rst                          |   24 +
 gcc/doc/cpp/deleted-code.rst                       |   34 +
 gcc/doc/cpp/diagnostics.rst                        |   51 +
 gcc/doc/cpp/environment-variables.rst              |   23 +
 gcc/doc/cpp/gnu-free-documentation-license.rst     |    6 +
 gcc/doc/cpp/header-files.rst                       |   56 +
 .../alternatives-to-wrapper-ifndef.rst             |   40 +
 gcc/doc/cpp/header-files/computed-includes.rst     |   86 +
 gcc/doc/cpp/header-files/include-operation.rst     |   67 +
 gcc/doc/cpp/header-files/include-syntax.rst        |   42 +
 gcc/doc/cpp/header-files/once-only-headers.rst     |   52 +
 gcc/doc/cpp/header-files/search-path.rst           |   53 +
 gcc/doc/cpp/header-files/system-headers.rst        |   41 +
 gcc/doc/cpp/header-files/wrapper-headers.rst       |   58 +
 gcc/doc/cpp/implementation-defined-behavior.rst    |   97 +
 gcc/doc/cpp/implementation-details.rst             |   23 +
 gcc/doc/cpp/implementation-limits.rst              |   68 +
 gcc/doc/cpp/index.rst                              |   35 +
 gcc/doc/cpp/indices-and-tables.rst                 |    1 +
 gcc/doc/cpp/initial-processing.rst                 |  164 +
 gcc/doc/cpp/invocation.rst                         |   81 +
 gcc/doc/cpp/line-control.rst                       |   55 +
 gcc/doc/cpp/macros.rst                             |   37 +
 gcc/doc/cpp/macros/concatenation.rst               |   85 +
 .../macros/directives-within-macro-arguments.rst   |   39 +
 gcc/doc/cpp/macros/function-like-macros.rst        |   55 +
 gcc/doc/cpp/macros/macro-arguments.rst             |  112 +
 gcc/doc/cpp/macros/macro-pitfalls.rst              |  449 ++
 gcc/doc/cpp/macros/object-like-macros.rst          |  126 +
 gcc/doc/cpp/macros/predefined-macros.rst           |  874 ++++
 gcc/doc/cpp/macros/stringizing.rst                 |   86 +
 .../macros/undefining-and-redefining-macros.rst    |   67 +
 gcc/doc/cpp/macros/variadic-macros.rst             |  141 +
 gcc/doc/cpp/obsolete-features.rst                  |   98 +
 gcc/doc/cpp/other-directives.rst                   |   30 +
 gcc/doc/cpp/overview.rst                           |   67 +
 gcc/doc/cpp/pragmas.rst                            |  121 +
 gcc/doc/cpp/preprocessor-output.rst                |   86 +
 gcc/doc/cpp/the-preprocessing-language.rst         |   69 +
 gcc/doc/cpp/tokenization.rst                       |  168 +
 gcc/doc/cpp/traditional-lexical-analysis.rst       |   74 +
 gcc/doc/cpp/traditional-macros.rst                 |   99 +
 gcc/doc/cpp/traditional-miscellany.rst             |   30 +
 gcc/doc/cpp/traditional-mode.rst                   |   35 +
 gcc/doc/cpp/traditional-warnings.rst               |   49 +
 gcc/doc/cppinternals/conf.py                       |   24 +
 gcc/doc/cppinternals/copyright.rst                 |   19 +
 gcc/doc/cppinternals/cppinternals.rst              |  284 ++
 gcc/doc/cppinternals/cpplib.rst                    |   29 +
 gcc/doc/cppinternals/files.rst                     |   70 +
 gcc/doc/cppinternals/index.rst                     |   21 +
 gcc/doc/cppinternals/indices-and-tables.rst        |    1 +
 .../internal-representation-of-macros.rst          |   27 +
 .../cppinternals/just-which-line-number-anyway.rst |   62 +
 gcc/doc/cppinternals/lexing-a-line.rst             |   91 +
 gcc/doc/cppinternals/lexing-a-token.rst            |  177 +
 ...-a-function-like-macros-opening-parenthesis.rst |   24 +
 gcc/doc/cppinternals/macro-expansion-overview.rst  |   51 +
 ...king-tokens-ineligible-for-future-expansion.rst |   24 +
 .../cppinternals/multiple-include-optimization.rst |  117 +
 gcc/doc/cppinternals/overview.rst                  |   24 +
 .../representation-of-line-numbers.rst             |   32 +
 ...g-the-replacement-list-for-macros-to-expand.rst |   57 +
 gcc/doc/gcc/binary-compatibility.rst               |  151 +
 .../gcc/c++-implementation-defined-behavior.rst    |   33 +
 gcc/doc/gcc/c-implementation-defined-behavior.rst  |   46 +
 .../architecture.rst                               |   47 +
 .../arrays-and-pointers.rst                        |   46 +
 .../characters.rst                                 |   93 +
 .../declarators.rst                                |   14 +
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 .../c-implementation-defined-behavior/hints.rst    |   35 +
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 .../qualifiers.rst                                 |   53 +
 .../statements.rst                                 |   14 +
 ...ructures-unions-enumerations-and-bit-fields.rst |   78 +
 .../translation.rst                                |   20 +
 gcc/doc/gcc/conditionally-supported-behavior.rst   |   20 +
 gcc/doc/gcc/conf.py                                |   37 +
 gcc/doc/gcc/contributing-to-gcc-development.rst    |    6 +
 gcc/doc/gcc/contributors-to-gcc.rst                |    6 +
 gcc/doc/gcc/copyright.rst                          |   25 +
 gcc/doc/gcc/exception-handling.rst                 |   15 +
 gcc/doc/gcc/extensions-to-the-c++-language.rst     |   34 +
 .../backwards-compatibility.rst                    |   27 +
 .../c++-concepts.rst                               |   44 +
 .../c++-interface-and-implementation-pragmas.rst   |   97 +
 ...cific-variable-function-and-type-attributes.rst |   95 +
 .../deprecated-features.rst                        |   43 +
 ...ter-from-a-bound-pointer-to-member-function.rst |   48 +
 .../function-multiversioning.rst                   |   65 +
 .../restricting-pointer-aliasing.rst               |   52 +
 .../extensions-to-the-c++-language/type-traits.rst |  165 +
 .../vague-linkage.rst                              |   80 +
 .../when-is-a-volatile-c++-object-accessed.rst     |   58 +
 .../wheres-the-template.rst                        |  131 +
 .../gcc/extensions-to-the-c-language-family.rst    |   92 +
 .../128-bit-integers.rst                           |   18 +
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 .../alternate-keywords.rst                         |   46 +
 .../an-inline-function-is-as-fast-as-a-macro.rst   |  126 +
 .../arithmetic-on-void-and-function-pointers.rst   |   23 +
 .../arrays-of-length-zero.rst                      |  111 +
 .../arrays-of-variable-length.rst                  |   99 +
 .../attribute-syntax.rst                           |  259 ++
 .../binary-constants-using-the-0b-prefix.rst       |   29 +
 ...ns-for-memory-model-aware-atomic-operations.rst |  290 ++
 ...o-perform-arithmetic-with-overflow-checking.rst |  102 +
 .../c++-style-comments.rst                         |   18 +
 .../case-ranges.rst                                |   43 +
 .../cast-to-a-union-type.rst                       |   69 +
 .../complex-numbers.rst                            |  122 +
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 .../conditionals-with-omitted-operands.rst         |   39 +
 .../constructing-function-calls.rst                |  125 +
 .../decimal-floating-types.rst                     |   47 +
 .../declaring-attributes-of-functions.rst          |  109 +
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 .../amd-gcn-function-attributes.rst                |   93 +
 .../arc-function-attributes.rst                    |   88 +
 .../arm-function-attributes.rst                    |  168 +
 .../avr-function-attributes.rst                    |  120 +
 .../blackfin-function-attributes.rst               |   91 +
 .../bpf-function-attributes.rst                    |   24 +
 .../c-sky-function-attributes.rst                  |   37 +
 .../common-function-attributes.rst                 | 1891 ++++++++
 .../epiphany-function-attributes.rst               |   82 +
 .../h8-300-function-attributes.rst                 |   39 +
 .../ia-64-function-attributes.rst                  |   36 +
 .../m32c-function-attributes.rst                   |   75 +
 .../m32r-d-function-attributes.rst                 |   42 +
 .../m68k-function-attributes.rst                   |   30 +
 .../mcore-function-attributes.rst                  |   24 +
 .../mep-function-attributes.rst                    |   53 +
 .../microblaze-function-attributes.rst             |   46 +
 .../microsoft-windows-function-attributes.rst      |  104 +
 .../mips-function-attributes.rst                   |  134 +
 .../msp430-function-attributes.rst                 |  103 +
 .../nds32-function-attributes.rst                  |   96 +
 .../nios-ii-function-attributes.rst                |   42 +
 .../nvidia-ptx-function-attributes.rst             |   22 +
 .../powerpc-function-attributes.rst                |  225 +
 .../risc-v-function-attributes.rst                 |   43 +
 .../rl78-function-attributes.rst                   |   37 +
 .../rx-function-attributes.rst                     |   75 +
 .../s-390-function-attributes.rst                  |   52 +
 .../sh-function-attributes.rst                     |  101 +
 .../symbian-os-function-attributes.rst             |   12 +
 .../v850-function-attributes.rst                   |   20 +
 .../visium-function-attributes.rst                 |   22 +
 .../x86-function-attributes.rst                    | 1020 ++++
 .../xstormy16-function-attributes.rst              |   20 +
 .../designated-initializers.rst                    |  147 +
 ...e-alignment-of-functions-types-or-variables.rst |   44 +
 .../dollar-signs-in-identifier-names.rst           |   16 +
 .../double-word-integers.rst                       |   35 +
 .../enumerator-attributes.rst                      |   53 +
 .../fixed-point-types.rst                          |  128 +
 ...ecks-specific-to-particular-target-machines.rst |   47 +
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 ...g-the-return-or-frame-address-of-a-function.rst |   97 +
 .../half-precision-floating-point.rst              |   76 +
 .../hex-floats.rst                                 |   30 +
 ...w-to-use-inline-assembly-language-in-c-code.rst | 1979 ++++++++
 .../incomplete-enum-types.rst                      |   23 +
 .../label-attributes.rst                           |   65 +
 .../labels-as-values.rst                           |   86 +
 ...built-in-functions-for-atomic-memory-access.rst |  171 +
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 .../macros-with-a-variable-number-of-arguments.rst |   68 +
 .../mixed-declarations-labels-and-code.rst         |   27 +
 .../named-address-spaces.rst                       |  240 +
 .../nested-functions.rst                           |  132 +
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 .../non-lvalue-arrays-may-have-subscripts.rst      |   30 +
 .../nonlocal-gotos.rst                             |   62 +
 .../object-size-checking-built-in-functions.rst    |  145 +
 .../other-built-in-functions-provided-by-gcc.rst   | 1245 +++++
 .../pointer-arguments-in-variadic-functions.rst    |   22 +
 ...-to-arrays-with-qualifiers-work-as-expected.rst |   27 +
 .../pragmas-accepted-by-gcc.rst                    |  729 +++
 ...ototypes-and-old-style-function-definitions.rst |   63 +
 .../referring-to-a-type-with-typeof.rst            |  137 +
 .../slightly-looser-rules-for-escaped-newlines.rst |   23 +
 .../specifying-attributes-of-types.rst             |  713 +++
 .../specifying-attributes-of-variables.rst         | 1187 +++++
 .../statement-attributes.rst                       |   71 +
 .../statements-and-declarations-in-expressions.rst |  164 +
 .../structures-with-no-members.rst                 |   22 +
 .../support-for-offsetof.rst                       |   34 +
 .../target-builtins.rst                            |   53 +
 .../target-builtins/aarch64-built-in-functions.rst |   24 +
 .../target-builtins/alpha-built-in-functions.rst   |   88 +
 .../altera-nios-ii-built-in-functions.rst          |  118 +
 .../target-builtins/arc-built-in-functions.rst     |  233 +
 .../arc-simd-built-in-functions.rst                |  245 +
 .../arm-armv8-m-security-extensions.rst            |   35 +
 .../arm-c-language-extensions-acle.rst             |   30 +
 ...loating-point-status-and-control-intrinsics.rst |   17 +
 .../arm-iwmmxt-built-in-functions.rst              |  159 +
 .../target-builtins/avr-built-in-functions.rst     |  114 +
 .../basic-powerpc-built-in-functions.rst           |  724 +++
 .../blackfin-built-in-functions.rst                |   20 +
 .../target-builtins/bpf-built-in-functions.rst     |  100 +
 .../target-builtins/fr-v-built-in-functions.rst    |  474 ++
 .../mips-dsp-built-in-functions.rst                |  312 ++
 .../mips-loongson-built-in-functions.rst           |  447 ++
 .../target-builtins/mips-paired-single-support.rst |   45 +
 .../mips-simd-architecture-msa-support.rst         |  812 ++++
 .../target-builtins/msp430-built-in-functions.rst  |   36 +
 .../target-builtins/nds32-built-in-functions.rst   |   44 +
 .../other-mips-built-in-functions.rst              |   27 +
 .../picochip-built-in-functions.rst                |   45 +
 .../powerpc-altivec-vsx-built-in-functions.rst     | 2181 +++++++++
 .../powerpc-atomic-memory-operation-functions.rst  |   68 +
 ...are-transactional-memory-built-in-functions.rst |  226 +
 ...c-matrix-multiply-assist-built-in-functions.rst |  104 +
 .../target-builtins/pru-built-in-functions.rst     |   34 +
 .../target-builtins/risc-v-built-in-functions.rst  |   16 +
 .../target-builtins/rx-built-in-functions.rst      |  122 +
 .../s-390-system-z-built-in-functions.rst          |  121 +
 .../target-builtins/sh-built-in-functions.rst      |   50 +
 .../sparc-vis-built-in-functions.rst               |  226 +
 .../target-builtins/ti-c6x-built-in-functions.rst  |   43 +
 .../target-builtins/x86-built-in-functions.rst     | 1698 +++++++
 .../x86-control-flow-protection-intrinsics.rst     |   50 +
 .../x86-transactional-memory-intrinsics.rst        |  102 +
 .../the-character-esc-in-constants.rst             |   12 +
 .../thread-local-storage.rst                       |  219 +
 .../unnamed-structure-and-union-fields.rst         |   86 +
 ...tor-instructions-through-built-in-functions.rst |  285 ++
 .../when-is-a-volatile-object-accessed.rst         |   86 +
 ...y-model-extensions-for-transactional-memory.rst |   38 +
 gcc/doc/gcc/funding.rst                            |    6 +
 gcc/doc/gcc/gcc-command-options.rst                |   67 +
 gcc/doc/gcc/gcc-command-options/c++-modules.rst    |  352 ++
 .../gcc-command-options/compiling-c++-programs.rst |   42 +
 gcc/doc/gcc/gcc-command-options/description.rst    |   73 +
 .../environment-variables-affecting-gcc.rst        |  163 +
 .../gcc-command-options/gcc-developer-options.rst  | 1174 +++++
 .../machine-dependent-options.rst                  |   92 +
 .../machine-dependent-options/aarch64-options.rst  |  550 +++
 .../adapteva-epiphany-options.rst                  |  163 +
 .../machine-dependent-options/amd-gcn-options.rst  |   58 +
 .../machine-dependent-options/arc-options.rst      |  759 +++
 .../machine-dependent-options/arm-options.rst      | 1037 +++++
 .../machine-dependent-options/avr-mmcu.rst         |   97 +
 .../machine-dependent-options/avr-options.rst      |  543 +++
 .../machine-dependent-options/blackfin-options.rst |  227 +
 .../machine-dependent-options/c-sky-options.rst    |  193 +
 .../machine-dependent-options/c6x-options.rst      |   55 +
 .../machine-dependent-options/cris-options.rst     |  102 +
 .../machine-dependent-options/darwin-options.rst   |  224 +
 .../dec-alpha-options.rst                          |  274 ++
 .../machine-dependent-options/ebpf-options.rst     |   94 +
 .../machine-dependent-options/fr30-options.rst     |   27 +
 .../machine-dependent-options/frv-options.rst      |  279 ++
 .../machine-dependent-options/ft32-options.rst     |   44 +
 .../gnu-linux-options.rst                          |   56 +
 .../machine-dependent-options/h8-300-options.rst   |   64 +
 .../machine-dependent-options/hppa-options.rst     |  245 +
 .../machine-dependent-options/ia-64-options.rst    |  261 ++
 .../ibm-rs-6000-and-powerpc-options.rst            | 1017 ++++
 .../machine-dependent-options/lm32-options.rst     |   35 +
 .../loongarch-options.rst                          |  191 +
 .../machine-dependent-options/m32c-options.rst     |   38 +
 .../machine-dependent-options/m32r-d-options.rst   |  137 +
 .../machine-dependent-options/m680x0-options.rst   |  407 ++
 .../machine-dependent-options/mcore-options.rst    |   66 +
 .../machine-dependent-options/mep-options.rst      |  167 +
 .../microblaze-options.rst                         |  121 +
 .../machine-dependent-options/mips-options.rst     |  986 ++++
 .../machine-dependent-options/mmix-options.rst     |   75 +
 .../machine-dependent-options/mn10300-options.rst  |   93 +
 .../machine-dependent-options/moxie-options.rst    |   31 +
 .../machine-dependent-options/msp430-options.rst   |  189 +
 .../machine-dependent-options/nds32-options.rst    |  116 +
 .../machine-dependent-options/nios-ii-options.rst  |  363 ++
 .../nvidia-ptx-options.rst                         |   98 +
 .../machine-dependent-options/openrisc-options.rst |   95 +
 .../options-for-system-v.rst                       |   43 +
 .../machine-dependent-options/pdp-11-options.rst   |   73 +
 .../machine-dependent-options/picochip-options.rst |   55 +
 .../machine-dependent-options/powerpc-options.rst  |   15 +
 .../machine-dependent-options/pru-options.rst      |   63 +
 .../machine-dependent-options/risc-v-options.rst   |  216 +
 .../machine-dependent-options/rl78-options.rst     |   91 +
 .../machine-dependent-options/rx-options.rst       |  209 +
 .../s-390-and-zseries-options.rst                  |  244 +
 .../machine-dependent-options/score-options.rst    |   51 +
 .../machine-dependent-options/sh-options.rst       |  444 ++
 .../solaris-2-options.rst                          |   42 +
 .../machine-dependent-options/sparc-options.rst    |  388 ++
 .../machine-dependent-options/v850-options.rst     |  207 +
 .../machine-dependent-options/vax-options.rst      |   35 +
 .../machine-dependent-options/visium-options.rst   |   73 +
 .../machine-dependent-options/vms-options.rst      |   38 +
 .../machine-dependent-options/vxworks-options.rst  |   45 +
 .../machine-dependent-options/x86-options.rst      | 1620 +++++++
 .../x86-windows-options.rst                        |   95 +
 .../xstormy16-options.rst                          |   19 +
 .../machine-dependent-options/xtensa-options.rst   |  138 +
 .../machine-dependent-options/zseries-options.rst  |   15 +
 gcc/doc/gcc/gcc-command-options/option-summary.rst | 1527 ++++++
 .../options-controlling-c++-dialect.rst            | 2133 +++++++++
 .../options-controlling-c-dialect.rst              |  544 +++
 ...ling-objective-c-and-objective-c++-dialects.rst |  316 ++
 .../options-controlling-the-kind-of-output.rst     |  732 +++
 .../options-controlling-the-preprocessor.rst       |   79 +
 .../options-for-code-generation-conventions.rst    |  713 +++
 .../options-for-debugging-your-program.rst         |  471 ++
 .../options-for-directory-search.rst               |  102 +
 .../gcc-command-options/options-for-linking.rst    |  407 ++
 .../options-that-control-optimization.rst          | 4857 +++++++++++++++++++
 .../options-that-control-static-analysis.rst       | 1067 +++++
 ...s-to-control-diagnostic-messages-formatting.rst |  899 ++++
 .../options-to-request-or-suppress-warnings.rst    | 4866 ++++++++++++++++++++
 .../passing-options-to-the-assembler.rst           |   27 +
 .../program-instrumentation-options.rst            | 1111 +++++
 ...bprocesses-and-the-switches-to-pass-to-them.rst |  687 +++
 .../using-precompiled-headers.rst                  |  132 +
 gcc/doc/gcc/gcc.rst                                |   47 +
 gcc/doc/gcc/gcov-dump.rst                          |   70 +
 gcc/doc/gcc/gcov-tool.rst                          |  209 +
 gcc/doc/gcc/gcov.rst                               |   53 +
 .../gcov/brief-description-of-gcov-data-files.rst  |   33 +
 ...-file-relocation-to-support-cross-profiling.rst |   43 +
 gcc/doc/gcc/gcov/introduction-to-gcov.rst          |   62 +
 gcc/doc/gcc/gcov/invoking-gcov.rst                 |  656 +++
 ...-test-coverage-in-freestanding-environments.rst |  391 ++
 .../gcc/gcov/using-gcov-with-gcc-optimization.rst  |   86 +
 gcc/doc/gcc/general-public-license-3.rst           |    6 +
 gcc/doc/gcc/gnu-free-documentation-license.rst     |    6 +
 gcc/doc/gcc/gnu-objective-c-features.rst           |   27 +
 .../compatibilityalias.rst                         |   26 +
 .../constant-string-objects.rst                    |   64 +
 .../gcc/gnu-objective-c-features/exceptions.rst    |   79 +
 .../gnu-objective-c-features/fast-enumeration.rst  |  221 +
 .../garbage-collection.rst                         |   81 +
 .../gnu-objective-c-runtime-api.rst                |   98 +
 .../load-executing-code-before-main.rst            |  141 +
 .../messaging-with-the-gnu-objective-c-runtime.rst |  145 +
 .../gnu-objective-c-features/synchronization.rst   |   36 +
 .../gcc/gnu-objective-c-features/type-encoding.rst |  280 ++
 gcc/doc/gcc/gnu.rst                                |    1 +
 gcc/doc/gcc/have-you-found-a-bug.rst               |   62 +
 gcc/doc/gcc/how-and-where-to-report-bugs.rst       |   13 +
 gcc/doc/gcc/how-to-get-help-with-gcc.rst           |   26 +
 gcc/doc/gcc/index.rst                              |   40 +
 gcc/doc/gcc/indices-and-tables.rst                 |    1 +
 gcc/doc/gcc/known-causes-of-trouble-with-gcc.rst   |   32 +
 .../actual-bugs-we-havent-fixed-yet.rst            |   14 +
 .../certain-changes-we-dont-want-to-make.rst       |  236 +
 .../common-misunderstandings-with-gnu-c.rst        |  296 ++
 .../disappointments-and-misunderstandings.rst      |  102 +
 .../fixed-header-files.rst                         |   39 +
 .../incompatibilities-of-gcc.rst                   |  233 +
 .../interoperation.rst                             |  153 +
 .../standard-libraries.rst                         |   33 +
 .../warning-messages-and-error-messages.rst        |   46 +
 .../gcc/language-standards-supported-by-gcc.rst    |   23 +
 .../c++-language.rst                               |   71 +
 .../c-language.rst                                 |  139 +
 .../d-language.rst                                 |   11 +
 .../go-language.rst                                |   10 +
 .../objective-c-and-objective-c++-languages.rst    |   62 +
 .../references-for-other-languages.rst             |   13 +
 gcc/doc/gcc/lto-dump.rst                           |  117 +
 .../gcc/programming-languages-supported-by-gcc.rst |   54 +
 gcc/doc/gcc/reporting-bugs.rst                     |   23 +
 .../analysis-and-optimization-of-gimple-tuples.rst |   44 +
 .../alias-analysis.rst                             |  104 +
 .../annotations.rst                                |   17 +
 .../memory-model.rst                               |   34 +
 .../ssa-operands.rst                               |  388 ++
 .../static-single-assignment.rst                   |  259 ++
 .../analysis-and-representation-of-loops.rst       |   27 +
 .../data-dependency-analysis.rst                   |  135 +
 .../iv-analysis-on-rtl.rst                         |   55 +
 .../loop-closed-ssa-form.rst                       |   47 +
 .../loop-manipulation.rst                          |   58 +
 .../loop-querying.rst                              |   81 +
 .../loop-representation.rst                        |  137 +
 .../number-of-iterations-analysis.rst              |   85 +
 .../scalar-evolutions.rst                          |   71 +
 gcc/doc/gccint/analyzer-internals.rst              |  419 ++
 gcc/doc/gccint/collect2.rst                        |   77 +
 gcc/doc/gccint/conf.py                             |   24 +
 gcc/doc/gccint/contributing-to-gcc-development.rst |    6 +
 gcc/doc/gccint/contributors-to-gcc.rst             |    6 +
 gcc/doc/gccint/control-flow-graph.rst              |   43 +
 gcc/doc/gccint/control-flow-graph/basic-blocks.rst |  141 +
 gcc/doc/gccint/control-flow-graph/edges.rst        |  241 +
 .../control-flow-graph/liveness-information.rst    |   48 +
 .../control-flow-graph/maintaining-the-cfg.rst     |  145 +
 .../control-flow-graph/profile-information.rst     |  112 +
 gcc/doc/gccint/copyright.rst                       |   25 +
 gcc/doc/gccint/debugging-the-analyzer.rst          |  141 +
 gcc/doc/gccint/funding.rst                         |    6 +
 gcc/doc/gccint/gcc-and-portability.rst             |   41 +
 gcc/doc/gccint/general-public-license-3.rst        |    6 +
 gcc/doc/gccint/generic.rst                         |   47 +
 gcc/doc/gccint/generic/attributes-in-trees.rst     |   35 +
 gcc/doc/gccint/generic/c-and-c++-trees.rst         |  886 ++++
 gcc/doc/gccint/generic/declarations.rst            |  346 ++
 gcc/doc/gccint/generic/deficiencies.rst            |   14 +
 gcc/doc/gccint/generic/expressions.rst             |  910 ++++
 gcc/doc/gccint/generic/functions.rst               |  212 +
 .../gccint/generic/language-dependent-trees.rst    |   25 +
 gcc/doc/gccint/generic/overview.rst                |  213 +
 gcc/doc/gccint/generic/statements.rst              |  516 +++
 gcc/doc/gccint/generic/types.rst                   |  299 ++
 gcc/doc/gccint/gimple-api.rst                      |   47 +
 gcc/doc/gccint/gimple.rst                          |   88 +
 .../gimple/adding-a-new-gimple-statement-code.rst  |   36 +
 .../class-hierarchy-of-gimple-statements.rst       |  150 +
 gcc/doc/gccint/gimple/exception-handling.rst       |   46 +
 gcc/doc/gccint/gimple/gimple-instruction-set.rst   |  106 +
 gcc/doc/gccint/gimple/gimple-sequences.rst         |   94 +
 .../gimple/manipulating-gimple-statements.rst      |  176 +
 gcc/doc/gccint/gimple/operands.rst                 |  319 ++
 gcc/doc/gccint/gimple/sequence-iterators.rst       |  223 +
 .../gimple/statement-and-operand-traversals.rst    |   62 +
 gcc/doc/gccint/gimple/temporaries.rst              |   43 +
 gcc/doc/gccint/gimple/tuple-representation.rst     |  242 +
 gcc/doc/gccint/gimple/tuple-specific-accessors.rst |   44 +
 .../gimple/tuple-specific-accessors/gimpleasm.rst  |   66 +
 .../tuple-specific-accessors/gimpleassign.rst      |  126 +
 .../gimple/tuple-specific-accessors/gimplebind.rst |   56 +
 .../gimple/tuple-specific-accessors/gimplecall.rst |  116 +
 .../tuple-specific-accessors/gimplecatch.rst       |   37 +
 .../gimple/tuple-specific-accessors/gimplecond.rst |   80 +
 .../tuple-specific-accessors/gimpledebug.rst       |  106 +
 .../tuple-specific-accessors/gimpleehfilter.rst    |   45 +
 .../gimple/tuple-specific-accessors/gimplegoto.rst |   21 +
 .../tuple-specific-accessors/gimplelabel.rst       |   23 +
 .../gimple/tuple-specific-accessors/gimplenop.rst  |   17 +
 .../gimpleompatomicload.rst                        |   31 +
 .../gimpleompatomicstore.rst                       |   22 +
 .../tuple-specific-accessors/gimpleompcontinue.rst |   43 +
 .../tuple-specific-accessors/gimpleompcritical.rst |   28 +
 .../tuple-specific-accessors/gimpleompfor.rst      |   97 +
 .../tuple-specific-accessors/gimpleompmaster.rst   |   14 +
 .../tuple-specific-accessors/gimpleompordered.rst  |   16 +
 .../tuple-specific-accessors/gimpleompparallel.rst |   76 +
 .../tuple-specific-accessors/gimpleompreturn.rst   |   23 +
 .../tuple-specific-accessors/gimpleompsection.rst  |   24 +
 .../tuple-specific-accessors/gimpleompsections.rst |   48 +
 .../tuple-specific-accessors/gimpleompsingle.rst   |   28 +
 .../gimple/tuple-specific-accessors/gimplephi.rst  |   41 +
 .../gimple/tuple-specific-accessors/gimpleresx.rst |   24 +
 .../tuple-specific-accessors/gimplereturn.rst      |   21 +
 .../tuple-specific-accessors/gimpleswitch.rst      |   52 +
 .../gimple/tuple-specific-accessors/gimpletry.rst  |   51 +
 .../gimplewithcleanupexpr.rst                      |   30 +
 gcc/doc/gccint/gnu-free-documentation-license.rst  |    6 +
 gcc/doc/gccint/guidelines-for-diagnostics.rst      |  598 +++
 gcc/doc/gccint/guidelines-for-options.rst          |   13 +
 gcc/doc/gccint/host-common.rst                     |   57 +
 gcc/doc/gccint/host-configuration.rst              |   32 +
 gcc/doc/gccint/host-filesystem.rst                 |  103 +
 gcc/doc/gccint/host-makefile-fragments.rst         |   14 +
 gcc/doc/gccint/host-misc.rst                       |   70 +
 gcc/doc/gccint/index.rst                           |   51 +
 gcc/doc/gccint/indices-and-tables.rst              |    1 +
 gcc/doc/gccint/interfacing-to-gcc-output.rst       |   71 +
 gcc/doc/gccint/introduction.rst                    |   26 +
 gcc/doc/gccint/language-front-ends-in-gcc.rst      |   39 +
 gcc/doc/gccint/link-time-optimization.rst          |   33 +
 .../link-time-optimization/design-overview.rst     |  123 +
 .../internal-flags-controlling-lto1.rst            |   42 +
 .../link-time-optimization/lto-file-sections.rst   |  110 +
 .../using-summary-information-in-ipa-passes.rst    |  206 +
 ...tions-linker-plugin-and-symbol-visibilities.rst |   91 +
 gcc/doc/gccint/machine-descriptions.rst            |   49 +
 .../c-statements-for-assembler-output.rst          |  122 +
 .../canonicalization-of-instructions.rst           |  152 +
 .../machine-descriptions/conditional-execution.rst |   98 +
 .../machine-descriptions/constant-definitions.rst  |  185 +
 .../defining-how-to-split-instructions.rst         |  374 ++
 .../defining-jump-instruction-patterns.rst         |   37 +
 .../defining-looping-instruction-patterns.rst      |  134 +
 .../defining-rtl-sequences-for-code-generation.rst |  206 +
 .../everything-about-instruction-patterns.rst      |  106 +
 .../machine-descriptions/example-of-defineinsn.rst |   54 +
 .../including-patterns-in-machine-descriptions.rst |   70 +
 .../instruction-attributes.rst                     | 1248 +++++
 .../interdependence-of-patterns.rst                |   43 +
 gcc/doc/gccint/machine-descriptions/iterators.rst  |  543 +++
 .../machine-specific-peephole-optimizers.rst       |  330 ++
 .../machine-descriptions/operand-constraints.rst   |  426 ++
 .../output-templates-and-operand-substitution.rst  |   99 +
 ...view-of-how-the-machine-description-is-used.rst |   47 +
 gcc/doc/gccint/machine-descriptions/predicates.rst |  343 ++
 .../gccint/machine-descriptions/rtl-template.rst   |  255 +
 .../rtl-templates-transformations.rst              |  225 +
 .../standard-pattern-names-for-generation.rst      | 3413 ++++++++++++++
 .../when-the-order-of-patterns-matters.rst         |   29 +
 gcc/doc/gccint/makefile-fragments.rst              |   37 +
 gcc/doc/gccint/match-and-simplify.rst              |   34 +
 .../memory-management-and-type-information.rst     |  103 +
 .../how-to-invoke-the-garbage-collector.rst        |   36 +
 .../marking-roots-for-the-garbage-collector.rst    |   28 +
 .../source-files-containing-type-information.rst   |   60 +
 .../support-for-inheritance.rst                    |   59 +
 ...pport-for-user-provided-gc-marking-routines.rst |  121 +
 .../the-inside-of-a-gty.rst                        |  324 ++
 .../troubleshooting-the-garbage-collector.rst      |   27 +
 gcc/doc/gccint/option-file-format.rst              |  175 +
 gcc/doc/gccint/option-properties.rst               |  376 ++
 gcc/doc/gccint/option-specification-files.rst      |   21 +
 .../gccint/passes-and-files-of-the-compiler.rst    |   27 +
 .../gimplification-pass.rst                        |   44 +
 .../inter-procedural-optimization-passes.rst       |  269 ++
 .../optimization-info.rst                          |  262 ++
 .../parsing-pass.rst                               |   80 +
 .../pass-manager.rst                               |   42 +
 .../rtl-passes.rst                                 |  275 ++
 .../tree-ssa-passes.rst                            |  477 ++
 gcc/doc/gccint/plugins.rst                         |   35 +
 gcc/doc/gccint/plugins/building-gcc-plugins.rst    |   97 +
 .../controlling-which-passes-are-being-run.rst     |   16 +
 .../plugins/giving-information-about-a-plugin.rst  |   24 +
 .../interacting-with-the-gcc-garbage-collector.rst |   37 +
 .../plugins/interacting-with-the-pass-manager.rst  |   57 +
 .../plugins/keeping-track-of-available-passes.rst  |   17 +
 gcc/doc/gccint/plugins/loading-plugins.rst         |   31 +
 gcc/doc/gccint/plugins/plugin-api.rst              |  213 +
 .../recording-information-about-pass-execution.rst |   20 +
 .../registering-custom-attributes-or-pragmas.rst   |   73 +
 gcc/doc/gccint/rtl-representation.rst              |   48 +
 .../rtl-representation/access-to-operands.rst      |   73 +
 .../access-to-special-operands.rst                 |  188 +
 .../assembler-instructions-as-expressions.rst      |   45 +
 gcc/doc/gccint/rtl-representation/bit-fields.rst   |   48 +
 .../rtl-representation/comparison-operations.rst   |  112 +
 .../constant-expression-types.rst                  |  313 ++
 gcc/doc/gccint/rtl-representation/conversions.rst  |  152 +
 gcc/doc/gccint/rtl-representation/declarations.rst |   27 +
 .../embedded-side-effects-on-addresses.rst         |  100 +
 .../flags-in-an-rtl-expression.rst                 |  447 ++
 gcc/doc/gccint/rtl-representation/insns.rst        |  624 +++
 .../gccint/rtl-representation/machine-modes.rst    |  635 +++
 .../on-the-side-ssa-form-for-rtl.rst               |  748 +++
 gcc/doc/gccint/rtl-representation/reading-rtl.rst  |   28 +
 .../rtl-representation/registers-and-memory.rst    |  451 ++
 .../rtl-representation/rtl-classes-and-formats.rst |  192 +
 .../rtl-expressions-for-arithmetic.rst             |  310 ++
 .../gccint/rtl-representation/rtl-object-types.rst |   84 +
 .../rtl-representation-of-function-call-insns.rst  |   72 +
 .../rtl-representation/side-effect-expressions.rst |  374 ++
 .../structure-sharing-assumptions.rst              |   99 +
 .../variable-location-debug-information-in-rtl.rst |   64 +
 .../rtl-representation/vector-operations.rst       |   60 +
 .../sizes-and-offsets-as-runtime-invariants.rst    |   51 +
 .../alignment-of-polyints.rst                      |   84 +
 .../arithmetic-on-polyints.rst                     |  178 +
 .../comparisons-involving-polyint.rst              |  324 ++
 .../computing-bounds-on-polyints.rst               |   34 +
 .../consequences-of-using-polyint.rst              |   55 +
 .../converting-polyints.rst                        |   91 +
 .../guidelines-for-using-polyint.rst               |  119 +
 .../miscellaneous-polyint-routines.rst             |   16 +
 .../overview-of-polyint.rst                        |   78 +
 .../source-tree-structure-and-build-system.rst     |   21 +
 .../configure-terms-and-history.rst                |   64 +
 .../the-gcc-subdirectory.rst                       |   28 +
 .../anatomy-of-a-language-front-end.rst            |  281 ++
 .../anatomy-of-a-target-back-end.rst               |  116 +
 .../build-system-in-the-gcc-directory.rst          |   14 +
 .../building-documentation.rst                     |  235 +
 .../configuration-in-the-gcc-directory.rst         |  127 +
 .../headers-installed-by-gcc.rst                   |   50 +
 ...e-files-and-headers-under-the-gcc-directory.rst |   15 +
 .../the-gcc-subdirectory/makefile-targets.rst      |  195 +
 .../the-gcc-subdirectory/subdirectories-of-gcc.rst |   55 +
 .../top-level-source-directory.rst                 |  135 +
 .../gccint/standard-header-file-directories.rst    |   35 +
 gcc/doc/gccint/static-analyzer.rst                 |   19 +
 gcc/doc/gccint/target-macros.rst                   |   60 +
 .../adding-support-for-named-address-spaces.rst    |  163 +
 gcc/doc/gccint/target-macros/addressing-modes.rst  |  824 ++++
 .../adjusting-the-instruction-scheduler.rst        |  660 +++
 .../gccint/target-macros/anchored-addresses.rst    |   92 +
 .../gccint/target-macros/c++-abi-parameters.rst    |  164 +
 .../gccint/target-macros/condition-code-status.rst |  210 +
 .../controlling-debugging-information-format.rst   |  306 ++
 .../controlling-the-compilation-driver-gcc.rst     |  482 ++
 .../cross-compilation-and-floating-point.rst       |   73 +
 gcc/doc/gccint/target-macros/d-abi-parameters.rst  |  111 +
 ...ning-coprocessor-specifics-for-mips-targets.rst |   35 +
 ...ata-structures-for-per-function-information.rst |   62 +
 .../defining-target-specific-uses-of-attribute.rst |  319 ++
 .../defining-the-output-assembler-language.rst     |   27 +
 .../assembler-commands-for-alignment.rst           |   95 +
 .../assembler-commands-for-exception-regions.rst   |  188 +
 .../how-initialization-functions-are-handled.rst   |  122 +
 .../macros-controlling-initialization-routines.rst |  182 +
 .../output-and-generation-of-labels.rst            |  586 +++
 .../output-of-assembler-instructions.rst           |  252 +
 .../output-of-data.rst                             |  191 +
 .../output-of-dispatch-tables.rst                  |  171 +
 .../output-of-uninitialized-variables.rst          |  105 +
 .../the-overall-framework-of-an-assembler-file.rst |  287 ++
 .../describing-relative-costs-of-operations.rst    |  528 +++
 ...ividing-the-output-into-sections-texts-data.rst |  445 ++
 gcc/doc/gccint/target-macros/emulating-tls.rst     |  125 +
 .../implementing-the-varargs-macros.rst            |  192 +
 .../implicit-calls-to-library-routines.rst         |  141 +
 .../layout-of-source-language-data-types.rst       |  355 ++
 .../target-macros/miscellaneous-parameters.rst     | 1718 +++++++
 .../target-macros/mode-switching-instructions.rst  |  121 +
 ...rs-for-precompiled-header-validity-checking.rst |   63 +
 .../target-macros/position-independent-code.rst    |   53 +
 gcc/doc/gccint/target-macros/register-classes.rst  |  801 ++++
 gcc/doc/gccint/target-macros/register-usage.rst    |  563 +++
 .../run-time-target-specification.rst              |  273 ++
 .../stack-layout-and-calling-conventions.rst       |   35 +
 .../basic-stack-layout.rst                         |  304 ++
 .../caller-saves-register-allocation.rst           |   21 +
 .../eliminating-frame-pointer-and-arg-pointer.rst  |  102 +
 .../exception-handling-support.rst                 |  137 +
 .../function-entry-and-exit.rst                    |  265 ++
 .../generating-code-for-profiling.rst              |   61 +
 .../how-large-values-are-returned.rst              |  132 +
 .../how-scalar-function-values-are-returned.rst    |  166 +
 .../miscellaneous-register-hooks.rst               |   26 +
 .../passing-arguments-in-registers.rst             |  633 +++
 .../passing-function-arguments-on-the-stack.rst    |  193 +
 .../permitting-tail-calls.rst                      |   60 +
 .../registers-that-address-the-stack-frame.rst     |  198 +
 .../shrink-wrapping-separate-components.rst        |   93 +
 .../specifying-how-stack-checking-is-done.rst      |  118 +
 .../stack-smashing-protection.rst                  |   75 +
 gcc/doc/gccint/target-macros/storage-layout.rst    |  729 +++
 .../target-macros/support-for-nested-functions.rst |  222 +
 .../target-macros/the-global-targetm-variable.rst  |   65 +
 gcc/doc/gccint/target-makefile-fragments.rst       |  245 +
 gcc/doc/gccint/testsuites.rst                      |   31 +
 .../gccint/testsuites/ada-language-testsuites.rst  |   38 +
 .../gccint/testsuites/c-language-testsuites.rst    |  113 +
 .../directives-used-within-dejagnu-tests.rst       |   19 +
 .../commands-for-use-in-dg-final.rst               |  291 ++
 .../features-for-dg-add-options.rst                |  122 +
 .../keywords-describing-target-attributes.rst      | 1524 ++++++
 .../selecting-targets-to-which-a-test-applies.rst  |  106 +
 .../syntax-and-descriptions-of-test-directives.rst |  311 ++
 .../variants-of-dg-require-support.rst             |   83 +
 .../testsuites/idioms-used-in-testsuite-code.rst   |   84 +
 .../support-for-testing-binary-compatibility.rst   |  109 +
 .../gccint/testsuites/support-for-testing-gcov.rst |   72 +
 .../support-for-testing-gimple-passes.rst          |   55 +
 ...support-for-testing-link-time-optimizations.rst |   46 +
 ...-for-testing-profile-directed-optimizations.rst |   51 +
 .../testsuites/support-for-testing-rtl-passes.rst  |   48 +
 ...-for-torture-testing-using-multiple-options.rst |   52 +
 .../gccint/the-gcc-low-level-runtime-library.rst   |   50 +
 ...independent-routines-for-exception-handling.rst |   42 +
 .../miscellaneous-runtime-library-routines.rst     |   59 +
 ...utines-for-decimal-floating-point-emulation.rst |  312 ++
 ...utines-for-fixed-point-fractional-emulation.rst | 1432 ++++++
 .../routines-for-floating-point-emulation.rst      |  283 ++
 .../routines-for-integer-arithmetic.rst            |  183 +
 gcc/doc/gccint/the-language.rst                    |  384 ++
 gcc/doc/gccint/user-experience-guidelines.rst      |   30 +
 gcc/doc/install/binaries.rst                       |   54 +
 gcc/doc/install/building.rst                       |   67 +
 .../install/building/building-a-cross-compiler.rst |   74 +
 .../building/building-a-native-compiler.rst        |  191 +
 gcc/doc/install/building/building-in-parallel.rst  |   15 +
 .../install/building/building-the-ada-compiler.rst |    9 +
 .../install/building/building-the-d-compiler.rst   |    9 +
 .../building/building-with-profile-feedback.rst    |   34 +
 gcc/doc/install/conf.py                            |   24 +
 gcc/doc/install/configuration.rst                  | 2098 +++++++++
 gcc/doc/install/copyright.rst                      |   24 +
 gcc/doc/install/downloading-gcc.rst                |   42 +
 gcc/doc/install/final-installation.rst             |  128 +
 gcc/doc/install/gnu-free-documentation-license.rst |    6 +
 ...-target-specific-installation-notes-for-gcc.rst | 1336 ++++++
 ...can-you-run-the-testsuite-on-selected-tests.rst |   46 +
 gcc/doc/install/how-to-interpret-test-results.rst  |   32 +
 gcc/doc/install/index.rst                          |   27 +
 gcc/doc/install/indices-and-tables.rst             |    1 +
 gcc/doc/install/installing-gcc.rst                 |   39 +
 ...ing-options-and-running-multiple-testsuites.rst |   74 +
 gcc/doc/install/prerequisites.rst                  |  319 ++
 gcc/doc/install/submitting-test-results.rst        |   22 +
 gcc/doc/install/testing.rst                        |   69 +
 .../code-that-interacts-with-the-user.rst          |   15 +
 .../doc/gfc-internals/command-line-options.rst     |   30 +
 gcc/fortran/doc/gfc-internals/conf.py              |   24 +
 gcc/fortran/doc/gfc-internals/copyright.rst        |   25 +
 gcc/fortran/doc/gfc-internals/error-handling.rst   |   75 +
 .../doc/gfc-internals/frontend-data-structures.rst |   23 +
 ...-the-intermediate-language-for-later-stages.rst |   24 +
 .../accessing-declarations.rst                     |   16 +
 .../basic-data-structures.rst                      |   67 +
 .../converting-expressions-to-tree.rst             |   48 +
 .../translating-statements.rst                     |   14 +
 gcc/fortran/doc/gfc-internals/gfccode.rst          |  146 +
 gcc/fortran/doc/gfc-internals/gfcexpr.rst          |  156 +
 .../gnu-free-documentation-license.rst             |    6 +
 gcc/fortran/doc/gfc-internals/index.rst            |   24 +
 .../doc/gfc-internals/indices-and-tables.rst       |    1 +
 .../internals-of-fortran-2003-oop-features.rst     |   15 +
 gcc/fortran/doc/gfc-internals/introduction.rst     |   32 +
 .../doc/gfc-internals/symbol-versioning.rst        |   63 +
 .../the-libgfortran-runtime-library.rst            |   14 +
 .../doc/gfc-internals/type-bound-operators.rst     |   33 +
 .../doc/gfc-internals/type-bound-procedures.rst    |  101 +
 gcc/fortran/doc/gfortran/about-gnu-fortran.rst     |  115 +
 gcc/fortran/doc/gfortran/coarray-programming.rst   |   17 +
 .../doc/gfortran/compiler-characteristics.rst      |   27 +
 .../compiler-characteristics/asynchronous-i-o.rst  |   21 +
 .../data-consistency-and-durability.rst            |   80 +
 .../evaluation-of-logical-expressions.rst          |   18 +
 ...file-format-of-unformatted-sequential-files.rst |   63 +
 .../file-operations-on-symbolic-links.rst          |   28 +
 ...pened-without-an-explicit-action=-specifier.rst |   23 +
 ...nternal-representation-of-logical-variables.rst |   24 +
 .../kind-type-parameters.rst                       |   54 +
 ...-and-min-intrinsics-with-real-nan-arguments.rst |   21 +
 .../thread-safety-of-the-runtime-library.rst       |   53 +
 gcc/fortran/doc/gfortran/conf.py                   |   30 +
 gcc/fortran/doc/gfortran/contributing.rst          |   28 +
 .../doc/gfortran/contributors-to-gnu-fortran.rst   |  109 +
 gcc/fortran/doc/gfortran/copyright.rst             |   25 +
 .../extensions-implemented-in-gnu-fortran.rst      | 1535 ++++++
 .../extensions-not-implemented-in-gnu-fortran.rst  |  186 +
 gcc/fortran/doc/gfortran/extensions.rst            |   24 +
 .../doc/gfortran/function-abi-documentation.rst    | 1526 ++++++
 gcc/fortran/doc/gfortran/funding.rst               |    6 +
 .../doc/gfortran/general-public-license-3.rst      |    6 +
 gcc/fortran/doc/gfortran/gnu-fortran-and-gcc.rst   |   48 +
 .../doc/gfortran/gnu-fortran-command-options.rst   |   33 +
 .../gnu-fortran-command-options/description.rst    |   39 +
 .../enable-and-customize-preprocessing.rst         |  298 ++
 .../environment-variables-affecting-gfortran.rst   |   24 +
 .../influencing-runtime-behavior.rst               |   67 +
 .../influencing-the-linking-step.rst               |   37 +
 .../gnu-fortran-command-options/option-summary.rst |  104 +
 .../options-controlling-fortran-dialect.rst        |  411 ++
 .../options-for-code-generation-conventions.rst    |  583 +++
 ...s-for-debugging-your-program-or-gnu-fortran.rst |  134 +
 .../options-for-directory-search.rst               |   54 +
 ...s-for-interoperability-with-other-languages.rst |   63 +
 ...-to-request-or-suppress-errors-and-warnings.rst |  411 ++
 .../gfortran/gnu-fortran-compiler-directives.rst   |  174 +
 .../gfortran/gnu-free-documentation-license.rst    |    6 +
 gcc/fortran/doc/gfortran/index.rst                 |   56 +
 gcc/fortran/doc/gfortran/indices-and-tables.rst    |    1 +
 .../doc/gfortran/interoperability-with-c.rst       |  413 ++
 gcc/fortran/doc/gfortran/intrinsic-modules.rst     |   20 +
 ...eexceptions-ieeearithmetic-and-ieeefeatures.rst |   29 +
 .../doc/gfortran/intrinsic-modules/isocbinding.rst |  227 +
 .../gfortran/intrinsic-modules/isofortranenv.rst   |  116 +
 .../intrinsic-modules/openacc-module-openacc.rst   |   27 +
 .../openmp-modules-omplib-and-omplibkinds.rst      |  161 +
 gcc/fortran/doc/gfortran/intrinsic-procedures.rst  |  299 ++
 .../doc/gfortran/intrinsic-procedures/abort.rst    |   44 +
 .../doc/gfortran/intrinsic-procedures/abs.rst      |  117 +
 .../doc/gfortran/intrinsic-procedures/access.rst   |   61 +
 .../doc/gfortran/intrinsic-procedures/achar.rst    |   56 +
 .../doc/gfortran/intrinsic-procedures/acos.rst     |   73 +
 .../doc/gfortran/intrinsic-procedures/acosd.rst    |   74 +
 .../doc/gfortran/intrinsic-procedures/acosh.rst    |   70 +
 .../doc/gfortran/intrinsic-procedures/adjustl.rst  |   48 +
 .../doc/gfortran/intrinsic-procedures/adjustr.rst  |   48 +
 .../doc/gfortran/intrinsic-procedures/aimag.rst    |   81 +
 .../doc/gfortran/intrinsic-procedures/aint.rst     |   78 +
 .../doc/gfortran/intrinsic-procedures/alarm.rst    |   59 +
 .../doc/gfortran/intrinsic-procedures/all.rst      |   61 +
 .../gfortran/intrinsic-procedures/allocated.rst    |   49 +
 .../doc/gfortran/intrinsic-procedures/and.rst      |   60 +
 .../doc/gfortran/intrinsic-procedures/anint.rst    |   76 +
 .../doc/gfortran/intrinsic-procedures/any.rst      |   61 +
 .../doc/gfortran/intrinsic-procedures/asin.rst     |   73 +
 .../doc/gfortran/intrinsic-procedures/asind.rst    |   74 +
 .../doc/gfortran/intrinsic-procedures/asinh.rst    |   70 +
 .../gfortran/intrinsic-procedures/associated.rst   |   74 +
 .../doc/gfortran/intrinsic-procedures/atan.rst     |   80 +
 .../doc/gfortran/intrinsic-procedures/atan2.rst    |   85 +
 .../doc/gfortran/intrinsic-procedures/atan2d.rst   |   85 +
 .../doc/gfortran/intrinsic-procedures/atand.rst    |   80 +
 .../doc/gfortran/intrinsic-procedures/atanh.rst    |   70 +
 .../gfortran/intrinsic-procedures/atomicadd.rst    |   60 +
 .../gfortran/intrinsic-procedures/atomicand.rst    |   60 +
 .../gfortran/intrinsic-procedures/atomiccas.rst    |   67 +
 .../gfortran/intrinsic-procedures/atomicdefine.rst |   62 +
 .../intrinsic-procedures/atomicfetchadd.rst        |   65 +
 .../intrinsic-procedures/atomicfetchand.rst        |   64 +
 .../intrinsic-procedures/atomicfetchor.rst         |   64 +
 .../intrinsic-procedures/atomicfetchxor.rst        |   64 +
 .../doc/gfortran/intrinsic-procedures/atomicor.rst |   60 +
 .../gfortran/intrinsic-procedures/atomicref.rst    |   68 +
 .../gfortran/intrinsic-procedures/atomicxor.rst    |   60 +
 .../gfortran/intrinsic-procedures/backtrace.rst    |   34 +
 .../doc/gfortran/intrinsic-procedures/besselj0.rst |   64 +
 .../doc/gfortran/intrinsic-procedures/besselj1.rst |   64 +
 .../doc/gfortran/intrinsic-procedures/besseljn.rst |   85 +
 .../doc/gfortran/intrinsic-procedures/bessely0.rst |   62 +
 .../doc/gfortran/intrinsic-procedures/bessely1.rst |   62 +
 .../doc/gfortran/intrinsic-procedures/besselyn.rst |   85 +
 .../doc/gfortran/intrinsic-procedures/bge.rst      |   42 +
 .../doc/gfortran/intrinsic-procedures/bgt.rst      |   41 +
 .../doc/gfortran/intrinsic-procedures/bitsize.rst  |   44 +
 .../doc/gfortran/intrinsic-procedures/ble.rst      |   42 +
 .../doc/gfortran/intrinsic-procedures/blt.rst      |   41 +
 .../doc/gfortran/intrinsic-procedures/btest.rst    |   89 +
 .../gfortran/intrinsic-procedures/cassociated.rst  |   54 +
 .../doc/gfortran/intrinsic-procedures/ceiling.rst  |   51 +
 .../gfortran/intrinsic-procedures/cfpointer.rst    |   63 +
 .../intrinsic-procedures/cfprocpointer.rst         |   64 +
 .../doc/gfortran/intrinsic-procedures/cfunloc.rst  |   64 +
 .../doc/gfortran/intrinsic-procedures/char.rst     |   71 +
 .../doc/gfortran/intrinsic-procedures/chdir.rst    |   51 +
 .../doc/gfortran/intrinsic-procedures/chmod.rst    |   70 +
 .../doc/gfortran/intrinsic-procedures/cloc.rst     |   51 +
 .../doc/gfortran/intrinsic-procedures/cmplx.rst    |   61 +
 .../gfortran/intrinsic-procedures/cobroadcast.rst  |   65 +
 .../doc/gfortran/intrinsic-procedures/comax.rst    |   66 +
 .../doc/gfortran/intrinsic-procedures/comin.rst    |   66 +
 .../intrinsic-procedures/commandargumentcount.rst  |   43 +
 .../intrinsic-procedures/compileroptions.rst       |   48 +
 .../intrinsic-procedures/compilerversion.rst       |   47 +
 .../doc/gfortran/intrinsic-procedures/complex.rst  |   50 +
 .../doc/gfortran/intrinsic-procedures/conjg.rst    |   63 +
 .../doc/gfortran/intrinsic-procedures/coreduce.rst |   94 +
 .../doc/gfortran/intrinsic-procedures/cos.rst      |   91 +
 .../doc/gfortran/intrinsic-procedures/cosd.rst     |   91 +
 .../doc/gfortran/intrinsic-procedures/cosh.rst     |   73 +
 .../doc/gfortran/intrinsic-procedures/cosum.rst    |   67 +
 .../doc/gfortran/intrinsic-procedures/cotan.rst    |   71 +
 .../doc/gfortran/intrinsic-procedures/cotand.rst   |   74 +
 .../doc/gfortran/intrinsic-procedures/count.rst    |   72 +
 .../doc/gfortran/intrinsic-procedures/cputime.rst  |   49 +
 .../doc/gfortran/intrinsic-procedures/cshift.rst   |   61 +
 .../doc/gfortran/intrinsic-procedures/csizeof.rst  |   55 +
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 .../ompgetprocbind.rst                             |   34 +
 .../ompgetschedule.rst                             |   37 +
 .../ompgetsupportedactivelevels.rst                |   31 +
 .../ompgetteamnum.rst                              |   27 +
 .../ompgetteamsize.rst                             |   36 +
 .../ompgetteamsthreadlimit.rst                     |   31 +
 .../ompgetthreadlimit.rst                          |   30 +
 .../ompgetthreadnum.rst                            |   34 +
 .../ompgetwtick.rst                                |   31 +
 .../ompgetwtime.rst                                |   33 +
 .../openmp-runtime-library-routines/ompinfinal.rst |   29 +
 .../ompinitlock.rst                                |   33 +
 .../ompinitnestlock.rst                            |   33 +
 .../ompinparallel.rst                              |   29 +
 .../ompisinitialdevice.rst                         |   29 +
 .../ompsetdefaultdevice.rst                        |   33 +
 .../ompsetdynamic.rst                              |   35 +
 .../openmp-runtime-library-routines/ompsetlock.rst |   35 +
 .../ompsetmaxactivelevels.rst                      |   35 +
 .../ompsetnested.rst                               |   40 +
 .../ompsetnestlock.rst                             |   35 +
 .../ompsetnumteams.rst                             |   34 +
 .../ompsetnumthreads.rst                           |   34 +
 .../ompsetschedule.rst                             |   40 +
 .../ompsetteamsthreadlimit.rst                     |   35 +
 .../omptestlock.rst                                |   36 +
 .../omptestnestlock.rst                            |   36 +
 .../ompunsetlock.rst                               |   36 +
 .../ompunsetnestlock.rst                           |   36 +
 libgomp/doc/reporting-bugs.rst                     |   14 +
 libgomp/doc/the-libgomp-abi.rst                    |   31 +
 .../implementing-atomic-construct.rst              |   21 +
 .../implementing-barrier-construct.rst             |   13 +
 .../implementing-critical-construct.rst            |   30 +
 ...-lastprivate-copyin-and-copyprivate-clauses.rst |   45 +
 .../implementing-flush-construct.rst               |   11 +
 .../the-libgomp-abi/implementing-for-construct.rst |   73 +
 .../implementing-master-construct.rst              |   18 +
 .../implementing-openaccs-parallel-construct.rst   |   13 +
 .../implementing-ordered-construct.rst             |   14 +
 .../implementing-parallel-construct.rst            |   55 +
 .../implementing-private-clause.rst                |   17 +
 .../implementing-reduction-clause.rst              |   15 +
 .../implementing-sections-construct.rst            |   42 +
 .../implementing-single-construct.rst              |   48 +
 .../implementing-threadprivate-construct.rst       |   18 +
 libiberty/doc/bsd.rst                              |    6 +
 libiberty/doc/conf.py                              |   25 +
 libiberty/doc/copyright.rst                        |   13 +
 libiberty/doc/extensions.rst                       |  767 +++
 .../doc/function-variable-and-macro-listing.rst    | 1857 ++++++++
 libiberty/doc/index.rst                            |   23 +
 libiberty/doc/indices-and-tables.rst               |    1 +
 libiberty/doc/introduction.rst                     |    8 +
 .../doc/lesser-general-public-license-2.1.rst      |    6 +
 libiberty/doc/overview.rst                         |   20 +
 libiberty/doc/replacement-functions.rst            |   62 +
 libiberty/doc/supplemental-functions.rst           |   31 +
 libiberty/doc/using.rst                            |   40 +
 libitm/doc/c-c++-language-constructs-for-tm.rst    |   39 +
 libitm/doc/conf.py                                 |   24 +
 libitm/doc/copyright.rst                           |   13 +
 libitm/doc/enabling-libitm.rst                     |   13 +
 libitm/doc/gnu-free-documentation-license.rst      |    6 +
 libitm/doc/index.rst                               |   27 +
 libitm/doc/indices-and-tables.rst                  |    1 +
 libitm/doc/internals.rst                           |   16 +
 libitm/doc/locking-conventions.rst                 |  261 ++
 libitm/doc/nesting-flat-vs-closed.rst              |   28 +
 libitm/doc/the-libitm-abi.rst                      |   27 +
 libitm/doc/the-libitm-abi/function-list.rst        |  272 ++
 .../future-enhancements-to-the-abi.rst             |    7 +
 .../the-libitm-abi/library-design-principles.rst   |   61 +
 libitm/doc/the-libitm-abi/memory-model.rst         |   18 +
 libitm/doc/the-libitm-abi/non-objectives.rst       |    7 +
 libitm/doc/the-libitm-abi/objectives.rst           |    7 +
 libitm/doc/the-libitm-abi/sample-code.rst          |   10 +
 .../doc/the-libitm-abi/types-and-macros-list.rst   |   10 +
 libitm/doc/tm-methods-and-method-groups.rst        |   47 +
 libquadmath/doc/conf.py                            |   24 +
 libquadmath/doc/copyright.rst                      |   18 +
 libquadmath/doc/gnu-free-documentation-license.rst |    6 +
 libquadmath/doc/i-o-library-routines.rst           |   15 +
 libquadmath/doc/index.rst                          |   23 +
 libquadmath/doc/indices-and-tables.rst             |    1 +
 libquadmath/doc/introduction.rst                   |    7 +
 libquadmath/doc/math-library-routines.rst          |  104 +
 libquadmath/doc/quadmathsnprintf.rst               |   74 +
 libquadmath/doc/reporting-bugs.rst                 |   12 +
 libquadmath/doc/strtoflt128.rst                    |   40 +
 libquadmath/doc/typedef-and-constants.rst          |   43 +
 1335 files changed, 176972 insertions(+)

diff --git a/doc/Makefile b/doc/Makefile
new file mode 100644
index 00000000000..9e305a8e7da
--- /dev/null
+++ b/doc/Makefile
@@ -0,0 +1,97 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS   ?= -j auto -q
+SPHINXBUILD  ?= sphinx-build
+PAPER        ?=
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_elements.papersize=a4paper
+PAPEROPT_letter = -D latex_elements.papersize=letterpaper
+# $(O) is meant as a shortcut for $(SPHINXOPTS)
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+# the i18n builder cannot share the environment and doctrees with the others
+I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+
+.PHONY: help
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html        to make standalone HTML files"
+	@echo "  dirhtml     to make HTML files named index.html in directories"
+	@echo "  singlehtml  to make a single large HTML file"
+	@echo "  pickle      to make pickle files"
+	@echo "  json        to make JSON files"
+	@echo "  htmlhelp    to make HTML files and an HTML help project"
+	@echo "  qthelp      to make HTML files and a qthelp project"
+	@echo "  applehelp   to make an Apple Help Book"
+	@echo "  devhelp     to make HTML files and a Devhelp project"
+	@echo "  epub        to make an epub"
+	@echo "  latex       to make LaTeX files (you can set PAPER=a4 or PAPER=letter)"
+	@echo "  latexpdf    to make LaTeX files and then PDFs out of them"
+	@echo "  latexpdfja  to make LaTeX files and run them through platex/dvipdfmx"
+	@echo "  lualatexpdf to make LaTeX files and run them through lualatex"
+	@echo "  xelatexpdf  to make LaTeX files and run them through xelatex"
+	@echo "  text        to make text files"
+	@echo "  man         to make manual pages"
+	@echo "  texinfo     to make Texinfo files"
+	@echo "  info        to make Texinfo files and run them through makeinfo"
+	@echo "  gettext     to make PO message catalogs"
+	@echo "  changes     to make an overview of all changed/added/deprecated items"
+	@echo "  xml         to make Docutils-native XML files"
+	@echo "  pseudoxml   to make pseudoxml-XML files for display purposes"
+	@echo "  linkcheck   to check all external links for integrity"
+	@echo "  doctest     to run all doctests embedded in the documentation (if enabled)"
+	@echo "  coverage    to run coverage check of the documentation (if enabled)"
+	@echo "  dummy       to check syntax errors of document sources"
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILDDIR)
+
+.PHONY: latexpdf
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	$(MAKE) LATEXMKOPTS="-interaction=nonstopmode -f" -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: latexpdfja
+latexpdfja:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through platex and dvipdfmx..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: lualatexpdf
+lualatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through lualatex..."
+	$(MAKE) PDFLATEX=lualatex -C $(BUILDDIR)/latex all-pdf
+	@echo "lualatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: xelatexpdf
+xelatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through xelatex..."
+	$(MAKE) PDFLATEX=xelatex -C $(BUILDDIR)/latex all-pdf
+	@echo "xelatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: info
+info:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo "Running Texinfo files through makeinfo..."
+	make -C $(BUILDDIR)/texinfo info
+	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
+
+.PHONY: gettext
+gettext:
+	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+
+# Catch-all target: route all unknown targets to Sphinx
+.PHONY: Makefile
+%: Makefile
+	$(SPHINXBUILD) -b "$@" $(ALLSPHINXOPTS) "$(BUILDDIR)/$@"
+
diff --git a/doc/_static/custom.css b/doc/_static/custom.css
new file mode 100644
index 00000000000..1282a993e2a
--- /dev/null
+++ b/doc/_static/custom.css
@@ -0,0 +1,11 @@
+.sidebar-brand-text {
+  font-size: 13pt;
+}
+
+.literal {
+  white-space: nowrap !important;
+}
+
+.wy-nav-content {
+  max-width: initial;
+}
diff --git a/doc/baseconf.py b/doc/baseconf.py
new file mode 100644
index 00000000000..2eea8298dae
--- /dev/null
+++ b/doc/baseconf.py
@@ -0,0 +1,230 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import os
+import subprocess
+import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+# gccint needs a deeper stack limit
+sys.setrecursionlimit(2000)
+
+# -- Project information -----------------------------------------------------
+
+# The full version, including alpha/beta/rc tags
+
+# FIXME
+folder = os.path.dirname(os.path.realpath(__file__))
+gcc_srcdir = os.path.join(folder, './objdir')
+
+
+def __read_file(name):
+    path = os.path.join(gcc_srcdir, name)
+    if os.path.exists(path):
+        return open(path).read().strip()
+    else:
+        return ''
+
+
+def __get_git_revision():
+    try:
+        r = subprocess.check_output('git rev-parse --short HEAD', shell=True, encoding='utf8',
+                                    stderr=subprocess.DEVNULL)
+        return r.strip()
+    except subprocess.CalledProcessError:
+        return None
+
+
+def __get_builder_name():
+    if '-b' in sys.argv:
+        return sys.argv[sys.argv.index('-b') + 1]
+    else:
+        return None
+
+
+gcc_BASEVER = __read_file('BASE-VER')
+gcc_DEVPHASE = __read_file('DEV-PHASE')
+gcc_DATESTAMP = __read_file('DATESTAMP')
+gcc_REVISION = __read_file('REVISION')
+
+VERSION_PACKAGE = os.getenv('VERSION_PACKAGE', '(GCC)')
+BUGURL = os.getenv('BUGURL', 'https://gcc.gnu.org/bugs/')
+MONOCHROMATIC = os.getenv('MONOCHROMATIC')
+
+# The short X.Y version.
+version = gcc_BASEVER
+
+# The full version, including alpha/beta/rc tags.
+release = ('%s (%s %s%s)'
+           % (gcc_BASEVER, gcc_DEVPHASE, gcc_DATESTAMP,
+              (' %s' % gcc_REVISION) if gcc_REVISION else ''))
+
+rst_prolog = r'''
+.. |gol| raw:: latex
+
+               \\
+.. |nbsp| unicode:: 0xA0
+  :trim:
+'''
+
+needs_sphinx = '5.3'
+
+rst_epilog = '''
+.. |gcc_version| replace:: %s
+.. |package_version| replace:: %s
+.. |bugurl| replace:: %s
+.. |needs_sphinx| replace:: %s
+''' % (gcc_BASEVER, VERSION_PACKAGE, BUGURL, needs_sphinx)
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'gcc_sphinx',
+    'sphinx.ext.intersphinx',
+    'sphinx.ext.extlinks',
+    'sphinx.ext.todo',
+]
+
+if __get_builder_name() == 'html':
+    extensions.append('sphinx_copybutton')
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ['_build']
+
+# Do not highlight by default
+highlight_language = 'none'
+
+# Select C++ as a primary domain
+primary_domain = 'cpp'
+
+cpp_id_attributes = ['HOST_WIDE_INT', '__memx']
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'furo'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+html_theme_options = {
+    'navigation_with_keys': True,
+}
+
+html_logo = '../logo.svg'
+
+html_favicon = '../favicon.ico'
+
+html_last_updated_fmt = ''
+
+html_context = {
+    'commit': __get_git_revision()
+}
+
+html_static_path = [
+    '../_static'
+]
+
+html_css_files = [
+    'custom.css'
+]
+
+# By default, do not generate any manual pages
+man_pages = []
+
+# FIXME: handle WARNINGs: unknown option issues and cross refs
+suppress_warnings = [
+    'ref.option',
+]
+
+# Use xelatex by default
+latex_engine = 'xelatex'
+
+latex_logo = '../logo.pdf'
+
+latex_elements = {
+    'pointsize': '11pt',
+    'fontpkg': r'''
+\setmonofont[Scale=0.8]{DejaVu Sans Mono}
+''',
+    'preamble': r'''
+\fvset{formatcom=\let\textbf\relax}
+\protected\def\sphinxcrossref#1{#1}
+''',
+}
+
+if MONOCHROMATIC:
+    latex_elements['sphinxsetup'] = r'''
+TitleColor={black},
+InnerLinkColor={rgb}{0.0, 0.2, 0.6},
+OuterLinkColor={rgb}{0.0, 0.2, 0.6},
+'''
+
+latex_table_style = ['colorrows']
+
+texinfo_cross_references = False
+
+texinfo_elements = {'preamble': """
+@definfoenclose strong,*,*
+@definfoenclose emph,','
+"""
+}
+
+# Use default as RTD theme uses default as well
+pygments_style = 'bw' if MONOCHROMATIC else 'default'
+
+option_emphasise_placeholders = True
+
+# Ignore GitHub domain for link checking:
+# https://github.com/sphinx-doc/sphinx/issues/9016
+linkcheck_ignore = [
+    'https://github.com/.*#.*'
+]
+
+USER_LEVEL_DOCS = ('install', 'gcc', 'gfortran', 'cpp', 'gnat_rm', 'gnat_ugn',
+                   'gccgo', 'libgomp', 'libquadmath', 'libgccjit')
+INTERNAL_DOCS = ('gccint', 'cppinternals', 'gfc-internals', 'gnat-style')
+
+# Cross manual reference mapping
+intersphinx_mapping = {}
+for manual in USER_LEVEL_DOCS + INTERNAL_DOCS:
+    intersphinx_mapping[manual] = (f'https://splichal.eu/scripts/sphinx/{manual}/_build/html/', None)
+
+# Custom references
+extlinks = {
+    'P': ('https://wg21.link/p%s', 'P%s'),
+    'PR': ('https://gcc.gnu.org/PR%s', 'PR%s'),
+    'openmp': ('https://openmp.org/specifications/#%s', 'OpenMP specification v%s'),
+    'openacc': ('https://openacc.org/specification#%s', 'OpenACC specification v%s'),
+}
+
+extlinks_detect_hardcoded_links = True
+
+# Set common settings where we need NAME of the documentation
+def set_common(name, module):
+    module['tags'].add(name)
+    if gcc_DEVPHASE == 'experimental':
+        module['todo_include_todos'] = True
+        module['tags'].add('development')
+
+    html_theme_options['source_edit_link'] = f'https://splichal.eu/scripts/sphinx/{name}' \
+                                               '/_build/html/_sources/{filename}.txt'
diff --git a/doc/bsd.rst b/doc/bsd.rst
new file mode 100644
index 00000000000..6d53fa6271c
--- /dev/null
+++ b/doc/bsd.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+BSD
+===
+
+Copyright (C) 1990 Regents of the University of California.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+#. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+#. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+#. [rescinded 22 July 1999]
+
+#. Neither the name of the University nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS 'AS IS' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
\ No newline at end of file
diff --git a/doc/contrib.rst b/doc/contrib.rst
new file mode 100644
index 00000000000..273d61717b1
--- /dev/null
+++ b/doc/contrib.rst
@@ -0,0 +1,1273 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: contributors
+
+.. _contributors:
+
+Contributors to GCC
+===================
+
+The GCC project would like to thank its many contributors.  Without them the
+project would not have been nearly as successful as it has been.  Any omissions
+in this list are accidental.  Feel free to contact
+law@redhat.com or gerald@pfeifer.com if you have been left
+out or some of your contributions are not listed.  Please keep this list in
+alphabetical order.
+
+* Analog Devices helped implement the support for complex data types
+  and iterators.
+
+* John David Anglin for threading-related fixes and improvements to
+  libstdc++-v3, and the HP-UX port.
+
+* James van Artsdalen wrote the code that makes efficient use of
+  the Intel 80387 register stack.
+
+* Abramo and Roberto Bagnara for the SysV68 Motorola 3300 Delta Series
+  port.
+
+* Alasdair Baird for various bug fixes.
+
+* Giovanni Bajo for analyzing lots of complicated C++ problem reports.
+
+* Peter Barada for his work to improve code generation for new
+  ColdFire cores.
+
+* Gerald Baumgartner added the signature extension to the C++ front end.
+
+* Godmar Back for his Java improvements and encouragement.
+
+* Scott Bambrough for help porting the Java compiler.
+
+* Wolfgang Bangerth for processing tons of bug reports.
+
+* Jon Beniston for his Microsoft Windows port of Java and port to Lattice Mico32.
+
+* Daniel Berlin for better DWARF 2 support, faster/better optimizations,
+  improved alias analysis, plus migrating GCC to Bugzilla.
+
+* Geoff Berry for his Java object serialization work and various patches.
+
+* David Binderman tests weekly snapshots of GCC trunk against Fedora Rawhide
+  for several architectures.
+
+* Laurynas Biveinis for memory management work and DJGPP port fixes.
+
+* Uros Bizjak for the implementation of x87 math built-in functions and
+  for various middle end and i386 back end improvements and bug fixes.
+
+* Eric Blake for helping to make GCJ and libgcj conform to the
+  specifications.
+
+* Janne Blomqvist for contributions to GNU Fortran.
+
+* Hans-J. Boehm for his garbage collector, IA-64 libffi port, and other
+  Java work.
+
+* Segher Boessenkool for helping maintain the PowerPC port and the
+  instruction combiner plus various contributions to the middle end.
+
+* Neil Booth for work on cpplib, lang hooks, debug hooks and other
+  miscellaneous clean-ups.
+
+* Steven Bosscher for integrating the GNU Fortran front end into GCC and for
+  contributing to the tree-ssa branch.
+
+* Eric Botcazou for fixing middle- and backend bugs left and right.
+
+* Per Bothner for his direction via the steering committee and various
+  improvements to the infrastructure for supporting new languages.  Chill
+  front end implementation.  Initial implementations of
+  cpplib, fix-header, config.guess, libio, and past C++ library (libg++)
+  maintainer.  Dreaming up, designing and implementing much of GCJ.
+
+* Devon Bowen helped port GCC to the Tahoe.
+
+* Don Bowman for mips-vxworks contributions.
+
+* James Bowman for the FT32 port.
+
+* Dave Brolley for work on cpplib and Chill.
+
+* Paul Brook for work on the ARM architecture and maintaining GNU Fortran.
+
+* Robert Brown implemented the support for Encore 32000 systems.
+
+* Christian Bruel for improvements to local store elimination.
+
+* Herman A.J. ten Brugge for various fixes.
+
+* Joerg Brunsmann for Java compiler hacking and help with the GCJ FAQ.
+
+* Joe Buck for his direction via the steering committee from its creation
+  to 2013.
+
+* Iain Buclaw for the D frontend.
+
+* Craig Burley for leadership of the G77 Fortran effort.
+
+* Tobias Burnus for contributions to GNU Fortran.
+
+* Stephan Buys for contributing Doxygen notes for libstdc++.
+
+* Paolo Carlini for libstdc++ work: lots of efficiency improvements to
+  the C++ strings, streambufs and formatted I/O, hard detective work on
+  the frustrating localization issues, and keeping up with the problem reports.
+
+* John Carr for his alias work, SPARC hacking, infrastructure improvements,
+  previous contributions to the steering committee, loop optimizations, etc.
+
+* Stephane Carrez for 68HC11 and 68HC12 ports.
+
+* Steve Chamberlain for support for the Renesas SH and H8 processors
+  and the PicoJava processor, and for GCJ config fixes.
+
+* Glenn Chambers for help with the GCJ FAQ.
+
+* John-Marc Chandonia for various libgcj patches.
+
+* Denis Chertykov for contributing and maintaining the AVR port, the first GCC port
+  for an 8-bit architecture.
+
+* Kito Cheng for his work on the RISC-V port, including bringing up the test
+  suite and maintenance.
+
+* Scott Christley for his Objective-C contributions.
+
+* Eric Christopher for his Java porting help and clean-ups.
+
+* Branko Cibej for more warning contributions.
+
+* The `GNU Classpath project <https://www.gnu.org/software/classpath/>`_
+  for all of their merged runtime code.
+
+* Nick Clifton for arm, mcore, fr30, v850, m32r, msp430 rx work,
+  :option:`--help`, and other random hacking.
+
+* Michael Cook for libstdc++ cleanup patches to reduce warnings.
+
+* R. Kelley Cook for making GCC buildable from a read-only directory as
+  well as other miscellaneous build process and documentation clean-ups.
+
+* Ralf Corsepius for SH testing and minor bug fixing.
+
+* François-Xavier Coudert for contributions to GNU Fortran.
+
+* Stan Cox for care and feeding of the x86 port and lots of behind
+  the scenes hacking.
+
+* Alex Crain provided changes for the 3b1.
+
+* Ian Dall for major improvements to the NS32k port.
+
+* Paul Dale for his work to add uClinux platform support to the
+  m68k backend.
+
+* Palmer Dabbelt for his work maintaining the RISC-V port.
+
+* Dario Dariol contributed the four varieties of sample programs
+  that print a copy of their source.
+
+* Russell Davidson for fstream and stringstream fixes in libstdc++.
+
+* Bud Davis for work on the G77 and GNU Fortran compilers.
+
+* Mo DeJong for GCJ and libgcj bug fixes.
+
+* Jerry DeLisle for contributions to GNU Fortran.
+
+* DJ Delorie for the DJGPP port, build and libiberty maintenance,
+  various bug fixes, and the M32C, MeP, MSP430, and RL78 ports.
+
+* Arnaud Desitter for helping to debug GNU Fortran.
+
+* Gabriel Dos Reis for contributions to G++, contributions and
+  maintenance of GCC diagnostics infrastructure, libstdc++-v3,
+  including ``valarray<>``, ``complex<>``, maintaining the numerics library
+  (including that pesky ``<limits>`` :-) and keeping up-to-date anything
+  to do with numbers.
+
+* Ulrich Drepper for his work on glibc, testing of GCC using glibc, ISO C99
+  support, CFG dumping support, etc., plus support of the C++ runtime
+  libraries including for all kinds of C interface issues, contributing and
+  maintaining ``complex<>``, sanity checking and disbursement, configuration
+  architecture, libio maintenance, and early math work.
+
+* François Dumont for his work on libstdc++-v3, especially maintaining and
+  improving ``debug-mode`` and associative and unordered containers.
+
+* Zdenek Dvorak for a new loop unroller and various fixes.
+
+* Michael Eager for his work on the Xilinx MicroBlaze port.
+
+* Richard Earnshaw for his ongoing work with the ARM.
+
+* David Edelsohn for his direction via the steering committee, ongoing work
+  with the RS6000/PowerPC port, help cleaning up Haifa loop changes,
+  doing the entire AIX port of libstdc++ with his bare hands, and for
+  ensuring GCC properly keeps working on AIX.
+
+* Kevin Ediger for the floating point formatting of num_put::do_put in
+  libstdc++.
+
+* Phil Edwards for libstdc++ work including configuration hackery,
+  documentation maintainer, chief breaker of the web pages, the occasional
+  iostream bug fix, and work on shared library symbol versioning.
+
+* Paul Eggert for random hacking all over GCC.
+
+* Mark Elbrecht for various DJGPP improvements, and for libstdc++
+  configuration support for locales and fstream-related fixes.
+
+* Vadim Egorov for libstdc++ fixes in strings, streambufs, and iostreams.
+
+* Christian Ehrhardt for dealing with bug reports.
+
+* Ben Elliston for his work to move the Objective-C runtime into its
+  own subdirectory and for his work on autoconf.
+
+* Revital Eres for work on the PowerPC 750CL port.
+
+* Marc Espie for OpenBSD support.
+
+* Doug Evans for much of the global optimization framework, arc, m32r,
+  and SPARC work.
+
+* Christopher Faylor for his work on the Cygwin port and for caring and
+  feeding the gcc.gnu.org box and saving its users tons of spam.
+
+* Fred Fish for BeOS support and Ada fixes.
+
+* Ivan Fontes Garcia for the Portuguese translation of the GCJ FAQ.
+
+* Peter Gerwinski for various bug fixes and the Pascal front end.
+
+* Kaveh R. Ghazi for his direction via the steering committee, amazing
+  work to make :samp:`-W -Wall -W* -Werror` useful, and
+  testing GCC on a plethora of platforms.  Kaveh extends his gratitude to
+  the CAIP Center at Rutgers University for providing him with computing
+  resources to work on Free Software from the late 1980s to 2010.
+
+* John Gilmore for a donation to the FSF earmarked improving GNU Java.
+
+* Judy Goldberg for c++ contributions.
+
+* Torbjorn Granlund for various fixes and the c-torture testsuite,
+  multiply- and divide-by-constant optimization, improved long long
+  support, improved leaf function register allocation, and his direction
+  via the steering committee.
+
+* Jonny Grant for improvements to ``collect2's`` :option:`--help` documentation.
+
+* Anthony Green for his :option:`-Os` contributions, the moxie port, and
+  Java front end work.
+
+* Stu Grossman for gdb hacking, allowing GCJ developers to debug Java code.
+
+* Michael K. Gschwind contributed the port to the PDP-11.
+
+* Richard Biener for his ongoing middle-end contributions and bug fixes
+  and for release management.
+
+* Ron Guilmette implemented the :command:`protoize` and :command:`unprotoize`
+  tools, the support for DWARF 1 symbolic debugging information, and much of
+  the support for System V Release 4.  He has also worked heavily on the
+  Intel 386 and 860 support.
+
+* Sumanth Gundapaneni for contributing the CR16 port.
+
+* Mostafa Hagog for Swing Modulo Scheduling (SMS) and post reload GCSE.
+
+* Bruno Haible for improvements in the runtime overhead for EH, new
+  warnings and assorted bug fixes.
+
+* Andrew Haley for his amazing Java compiler and library efforts.
+
+* Chris Hanson assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Michael Hayes for various thankless work he's done trying to get
+  the c30/c40 ports functional.  Lots of loop and unroll improvements and
+  fixes.
+
+* Dara Hazeghi for wading through myriads of target-specific bug reports.
+
+* Kate Hedstrom for staking the G77 folks with an initial testsuite.
+
+* Richard Henderson for his ongoing SPARC, alpha, ia32, and ia64 work, loop
+  opts, and generally fixing lots of old problems we've ignored for
+  years, flow rewrite and lots of further stuff, including reviewing
+  tons of patches.
+
+* Aldy Hernandez for working on the PowerPC port, SIMD support, and
+  various fixes.
+
+* Nobuyuki Hikichi of Software Research Associates, Tokyo, contributed
+  the support for the Sony NEWS machine.
+
+* Kazu Hirata for caring and feeding the Renesas H8/300 port and various fixes.
+
+* Katherine Holcomb for work on GNU Fortran.
+
+* Manfred Hollstein for his ongoing work to keep the m88k alive, lots
+  of testing and bug fixing, particularly of GCC configury code.
+
+* Steve Holmgren for MachTen patches.
+
+* Mat Hostetter for work on the TILE-Gx and TILEPro ports.
+
+* Jan Hubicka for his x86 port improvements.
+
+* Falk Hueffner for working on C and optimization bug reports.
+
+* Bernardo Innocenti for his m68k work, including merging of
+  ColdFire improvements and uClinux support.
+
+* Christian Iseli for various bug fixes.
+
+* Kamil Iskra for general m68k hacking.
+
+* Lee Iverson for random fixes and MIPS testing.
+
+* Balaji V. Iyer for Cilk+ development and merging.
+
+* Andreas Jaeger for testing and benchmarking of GCC and various bug fixes.
+
+* Martin Jambor for his work on inter-procedural optimizations, the
+  switch conversion pass, and scalar replacement of aggregates.
+
+* Jakub Jelinek for his SPARC work and sibling call optimizations as well
+  as lots of bug fixes and test cases, and for improving the Java build
+  system.
+
+* Janis Johnson for ia64 testing and fixes, her quality improvement
+  sidetracks, and web page maintenance.
+
+* Kean Johnston for SCO OpenServer support and various fixes.
+
+* Tim Josling for the sample language treelang based originally on Richard
+  Kenner's 'toy' language.
+
+* Nicolai Josuttis for additional libstdc++ documentation.
+
+* Klaus Kaempf for his ongoing work to make alpha-vms a viable target.
+
+* Steven G. Kargl for work on GNU Fortran.
+
+* David Kashtan of SRI adapted GCC to VMS.
+
+* Ryszard Kabatek for many, many libstdc++ bug fixes and optimizations of
+  strings, especially member functions, and for auto_ptr fixes.
+
+* Geoffrey Keating for his ongoing work to make the PPC work for GNU/Linux
+  and his automatic regression tester.
+
+* Brendan Kehoe for his ongoing work with G++ and for a lot of early work
+  in just about every part of libstdc++.
+
+* Oliver M. Kellogg of Deutsche Aerospace contributed the port to the
+  MIL-STD-1750A.
+
+* Richard Kenner of the New York University Ultracomputer Research
+  Laboratory wrote the machine descriptions for the AMD 29000, the DEC
+  Alpha, the IBM RT PC, and the IBM RS/6000 as well as the support for
+  instruction attributes.  He also made changes to better support RISC
+  processors including changes to common subexpression elimination,
+  strength reduction, function calling sequence handling, and condition
+  code support, in addition to generalizing the code for frame pointer
+  elimination and delay slot scheduling.  Richard Kenner was also the
+  head maintainer of GCC for several years.
+
+* Mumit Khan for various contributions to the Cygwin and Mingw32 ports and
+  maintaining binary releases for Microsoft Windows hosts, and for massive libstdc++
+  porting work to Cygwin/Mingw32.
+
+* Robin Kirkham for cpu32 support.
+
+* Mark Klein for PA improvements.
+
+* Thomas Koenig for various bug fixes.
+
+* Bruce Korb for the new and improved fixincludes code.
+
+* Benjamin Kosnik for his G++ work and for leading the libstdc++-v3 effort.
+
+* Maxim Kuvyrkov for contributions to the instruction scheduler, the Android
+  and m68k/Coldfire ports, and optimizations.
+
+* Charles LaBrec contributed the support for the Integrated Solutions
+  68020 system.
+
+* Asher Langton and Mike Kumbera for contributing Cray pointer support
+  to GNU Fortran, and for other GNU Fortran improvements.
+
+* Jeff Law for his direction via the steering committee, coordinating the
+  entire egcs project and GCC 2.95, rolling out snapshots and releases,
+  handling merges from GCC2, reviewing tons of patches that might have
+  fallen through the cracks else, and random but extensive hacking.
+
+* Walter Lee for work on the TILE-Gx and TILEPro ports.
+
+* Marc Lehmann for his direction via the steering committee and helping
+  with analysis and improvements of x86 performance.
+
+* Victor Leikehman for work on GNU Fortran.
+
+* Ted Lemon wrote parts of the RTL reader and printer.
+
+* Kriang Lerdsuwanakij for C++ improvements including template as template
+  parameter support, and many C++ fixes.
+
+* Warren Levy for tremendous work on libgcj (Java Runtime Library) and
+  random work on the Java front end.
+
+* Alain Lichnewsky ported GCC to the MIPS CPU.
+
+* Oskar Liljeblad for hacking on AWT and his many Java bug reports and
+  patches.
+
+* Robert Lipe for OpenServer support, new testsuites, testing, etc.
+
+* Chen Liqin for various S+core related fixes/improvement, and for
+  maintaining the S+core port.
+
+* Martin Liska for his work on identical code folding, the sanitizers,
+  HSA, general bug fixing and for running automated regression testing of GCC
+  and reporting numerous bugs.
+
+* Weiwen Liu for testing and various bug fixes.
+
+* Manuel López-Ibáñez for improving :option:`-Wconversion` and
+  many other diagnostics fixes and improvements.
+
+* Dave Love for his ongoing work with the Fortran front end and
+  runtime libraries.
+
+* Martin von Löwis for internal consistency checking infrastructure,
+  various C++ improvements including namespace support, and tons of
+  assistance with libstdc++/compiler merges.
+
+* H.J. Lu for his previous contributions to the steering committee, many x86
+  bug reports, prototype patches, and keeping the GNU/Linux ports working.
+
+* Greg McGary for random fixes and (someday) bounded pointers.
+
+* Andrew MacLeod for his ongoing work in building a real EH system,
+  various code generation improvements, work on the global optimizer, etc.
+
+* Vladimir Makarov for hacking some ugly i960 problems, PowerPC hacking
+  improvements to compile-time performance, overall knowledge and
+  direction in the area of instruction scheduling, design and
+  implementation of the automaton based instruction scheduler and
+  design and implementation of the integrated and local register allocators.
+
+* David Malcolm for his work on improving GCC diagnostics, JIT, self-tests
+  and unit testing.
+
+* Bob Manson for his behind the scenes work on dejagnu.
+
+* John Marino for contributing the DragonFly BSD port.
+
+* Philip Martin for lots of libstdc++ string and vector iterator fixes and
+  improvements, and string clean up and testsuites.
+
+* Michael Matz for his work on dominance tree discovery, the x86-64 port,
+  link-time optimization framework and general optimization improvements.
+
+* All of the Mauve project contributors for Java test code.
+
+* Bryce McKinlay for numerous GCJ and libgcj fixes and improvements.
+
+* Adam Megacz for his work on the Microsoft Windows port of GCJ.
+
+* Michael Meissner for LRS framework, ia32, m32r, v850, m88k, MIPS,
+  powerpc, haifa, ECOFF debug support, and other assorted hacking.
+
+* Jason Merrill for his direction via the steering committee and leading
+  the G++ effort.
+
+* Martin Michlmayr for testing GCC on several architectures using the
+  entire Debian archive.
+
+* David Miller for his direction via the steering committee, lots of
+  SPARC work, improvements in jump.cc and interfacing with the Linux kernel
+  developers.
+
+* Gary Miller ported GCC to Charles River Data Systems machines.
+
+* Alfred Minarik for libstdc++ string and ios bug fixes, and turning the
+  entire libstdc++ testsuite namespace-compatible.
+
+* Mark Mitchell for his direction via the steering committee, mountains of
+  C++ work, load/store hoisting out of loops, alias analysis improvements,
+  ISO C ``restrict`` support, and serving as release manager from 2000
+  to 2011.
+
+* Alan Modra for various GNU/Linux bits and testing.
+
+* Toon Moene for his direction via the steering committee, Fortran
+  maintenance, and his ongoing work to make us make Fortran run fast.
+
+* Jason Molenda for major help in the care and feeding of all the services
+  on the gcc.gnu.org (formerly egcs.cygnus.com) machine---mail, web
+  services, ftp services, etc etc.  Doing all this work on scrap paper and
+  the backs of envelopes would have been... difficult.
+
+* Catherine Moore for fixing various ugly problems we have sent her
+  way, including the haifa bug which was killing the Alpha & PowerPC
+  Linux kernels.
+
+* Mike Moreton for his various Java patches.
+
+* David Mosberger-Tang for various Alpha improvements, and for the initial
+  IA-64 port.
+
+* Stephen Moshier contributed the floating point emulator that assists in
+  cross-compilation and permits support for floating point numbers wider
+  than 64 bits and for ISO C99 support.
+
+* Bill Moyer for his behind the scenes work on various issues.
+
+* Philippe De Muyter for his work on the m68k port.
+
+* Joseph S. Myers for his work on the PDP-11 port, format checking and ISO
+  C99 support, and continuous emphasis on (and contributions to) documentation.
+
+* Nathan Myers for his work on libstdc++-v3: architecture and authorship
+  through the first three snapshots, including implementation of locale
+  infrastructure, string, shadow C headers, and the initial project
+  documentation (DESIGN, CHECKLIST, and so forth).  Later, more work on
+  MT-safe string and shadow headers.
+
+* Felix Natter for documentation on porting libstdc++.
+
+* Nathanael Nerode for cleaning up the configuration/build process.
+
+* NeXT, Inc. donated the front end that supports the Objective-C
+  language.
+
+* Hans-Peter Nilsson for the CRIS and MMIX ports, improvements to the search
+  engine setup, various documentation fixes and other small fixes.
+
+* Geoff Noer for his work on getting cygwin native builds working.
+
+* Vegard Nossum for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Diego Novillo for his work on Tree SSA, OpenMP, SPEC performance
+  tracking web pages, GIMPLE tuples, and assorted fixes.
+
+* David O'Brien for the FreeBSD/alpha, FreeBSD/AMD x86-64, FreeBSD/ARM,
+  FreeBSD/PowerPC, and FreeBSD/SPARC64 ports and related infrastructure
+  improvements.
+
+* Alexandre Oliva for various build infrastructure improvements, scripts and
+  amazing testing work, including keeping libtool issues sane and happy.
+
+* Stefan Olsson for work on mt_alloc.
+
+* Melissa O'Neill for various NeXT fixes.
+
+* Rainer Orth for random MIPS work, including improvements to GCC's o32
+  ABI support, improvements to dejagnu's MIPS support, Java configuration
+  clean-ups and porting work, and maintaining the IRIX, Solaris 2, and
+  Tru64 UNIX ports.
+
+* Steven Pemberton for his contribution of :samp:`enquire` which allowed GCC to
+  determine various properties of the floating point unit and generate
+  :samp:`float.h` in older versions of GCC.
+
+* Hartmut Penner for work on the s390 port.
+
+* Paul Petersen wrote the machine description for the Alliant FX/8.
+
+* Alexandre Petit-Bianco for implementing much of the Java compiler and
+  continued Java maintainership.
+
+* Matthias Pfaller for major improvements to the NS32k port.
+
+* Gerald Pfeifer for his direction via the steering committee, pointing
+  out lots of problems we need to solve, maintenance of the web pages, and
+  taking care of documentation maintenance in general.
+
+* Marek Polacek for his work on the C front end, the sanitizers and general
+  bug fixing.
+
+* Andrew Pinski for processing bug reports by the dozen.
+
+* Ovidiu Predescu for his work on the Objective-C front end and runtime
+  libraries.
+
+* Jerry Quinn for major performance improvements in C++ formatted I/O.
+
+* Ken Raeburn for various improvements to checker, MIPS ports and various
+  cleanups in the compiler.
+
+* Rolf W. Rasmussen for hacking on AWT.
+
+* David Reese of Sun Microsystems contributed to the Solaris on PowerPC
+  port.
+
+* John Regehr for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Volker Reichelt for running automated regression testing of GCC and reporting
+  numerous bugs and for keeping up with the problem reports.
+
+* Joern Rennecke for maintaining the sh port, loop, regmove & reload
+  hacking and developing and maintaining the Epiphany port.
+
+* Loren J. Rittle for improvements to libstdc++-v3 including the FreeBSD
+  port, threading fixes, thread-related configury changes, critical
+  threading documentation, and solutions to really tricky I/O problems,
+  as well as keeping GCC properly working on FreeBSD and continuous testing.
+
+* Craig Rodrigues for processing tons of bug reports.
+
+* Ola Rönnerup for work on mt_alloc.
+
+* Gavin Romig-Koch for lots of behind the scenes MIPS work.
+
+* David Ronis inspired and encouraged Craig to rewrite the G77
+  documentation in texinfo format by contributing a first pass at a
+  translation of the old :samp:`g77-0.5.16/f/DOC` file.
+
+* Ken Rose for fixes to GCC's delay slot filling code.
+
+* Ira Rosen for her contributions to the auto-vectorizer.
+
+* Paul Rubin wrote most of the preprocessor.
+
+* Pétur Runólfsson for major performance improvements in C++ formatted I/O and
+  large file support in C++ filebuf.
+
+* Chip Salzenberg for libstdc++ patches and improvements to locales, traits,
+  Makefiles, libio, libtool hackery, and 'long long' support.
+
+* Juha Sarlin for improvements to the H8 code generator.
+
+* Greg Satz assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Roger Sayle for improvements to constant folding and GCC's RTL optimizers
+  as well as for fixing numerous bugs.
+
+* Bradley Schatz for his work on the GCJ FAQ.
+
+* Peter Schauer wrote the code to allow debugging to work on the Alpha.
+
+* William Schelter did most of the work on the Intel 80386 support.
+
+* Tobias Schlüter for work on GNU Fortran.
+
+* Bernd Schmidt for various code generation improvements and major
+  work in the reload pass, serving as release manager for
+  GCC 2.95.3, and work on the Blackfin and C6X ports.
+
+* Peter Schmid for constant testing of libstdc++---especially application
+  testing, going above and beyond what was requested for the release
+  criteria---and libstdc++ header file tweaks.
+
+* Jason Schroeder for jcf-dump patches.
+
+* Andreas Schwab for his work on the m68k port.
+
+* Lars Segerlund for work on GNU Fortran.
+
+* Dodji Seketeli for numerous C++ bug fixes and debug info improvements.
+
+* Tim Shen for major work on ``<regex>``.
+
+* Joel Sherrill for his direction via the steering committee, RTEMS
+  contributions and RTEMS testing.
+
+* Nathan Sidwell for many C++ fixes/improvements.
+
+* Jeffrey Siegal for helping RMS with the original design of GCC, some
+  code which handles the parse tree and RTL data structures, constant
+  folding and help with the original VAX & m68k ports.
+
+* Kenny Simpson for prompting libstdc++ fixes due to defect reports from
+  the LWG (thereby keeping GCC in line with updates from the ISO).
+
+* Franz Sirl for his ongoing work with making the PPC port stable
+  for GNU/Linux.
+
+* Andrey Slepuhin for assorted AIX hacking.
+
+* Trevor Smigiel for contributing the SPU port.
+
+* Christopher Smith did the port for Convex machines.
+
+* Danny Smith for his major efforts on the Mingw (and Cygwin) ports.
+  Retired from GCC maintainership August 2010, having mentored two
+  new maintainers into the role.
+
+* Randy Smith finished the Sun FPA support.
+
+* Ed Smith-Rowland for his continuous work on libstdc++-v3, special functions,
+  ``<random>``, and various improvements to C++11 features.
+
+* Scott Snyder for queue, iterator, istream, and string fixes and libstdc++
+  testsuite entries.  Also for providing the patch to G77 to add
+  rudimentary support for ``INTEGER*1``, ``INTEGER*2``, and
+  ``LOGICAL*1``.
+
+* Zdenek Sojka for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Arseny Solokha for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Jayant Sonar for contributing the CR16 port.
+
+* Brad Spencer for contributions to the GLIBCPP_FORCE_NEW technique.
+
+* Richard Stallman, for writing the original GCC and launching the GNU project.
+
+* Jan Stein of the Chalmers Computer Society provided support for
+  Genix, as well as part of the 32000 machine description.
+
+* Gerhard Steinmetz for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Nigel Stephens for various mips16 related fixes/improvements.
+
+* Jonathan Stone wrote the machine description for the Pyramid computer.
+
+* Graham Stott for various infrastructure improvements.
+
+* John Stracke for his Java HTTP protocol fixes.
+
+* Mike Stump for his Elxsi port, G++ contributions over the years and more
+  recently his vxworks contributions
+
+* Jeff Sturm for Java porting help, bug fixes, and encouragement.
+
+* Zhendong Su for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Chengnian Sun for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Shigeya Suzuki for this fixes for the bsdi platforms.
+
+* Ian Lance Taylor for the Go frontend, the initial mips16 and mips64
+  support, general configury hacking, fixincludes, etc.
+
+* Holger Teutsch provided the support for the Clipper CPU.
+
+* Gary Thomas for his ongoing work to make the PPC work for GNU/Linux.
+
+* Paul Thomas for contributions to GNU Fortran.
+
+* Philipp Thomas for random bug fixes throughout the compiler
+
+* Jason Thorpe for thread support in libstdc++ on NetBSD.
+
+* Kresten Krab Thorup wrote the run time support for the Objective-C
+  language and the fantastic Java bytecode interpreter.
+
+* Michael Tiemann for random bug fixes, the first instruction scheduler,
+  initial C++ support, function integration, NS32k, SPARC and M88k
+  machine description work, delay slot scheduling.
+
+* Andreas Tobler for his work porting libgcj to Darwin.
+
+* Teemu Torma for thread safe exception handling support.
+
+* Leonard Tower wrote parts of the parser, RTL generator, and RTL
+  definitions, and of the VAX machine description.
+
+* Daniel Towner and Hariharan Sandanagobalane contributed and
+  maintain the picoChip port.
+
+* Tom Tromey for internationalization support and for his many Java
+  contributions and libgcj maintainership.
+
+* Lassi Tuura for improvements to config.guess to determine HP processor
+  types.
+
+* Petter Urkedal for libstdc++ CXXFLAGS, math, and algorithms fixes.
+
+* Andy Vaught for the design and initial implementation of the GNU Fortran
+  front end.
+
+* Brent Verner for work with the libstdc++ cshadow files and their
+  associated configure steps.
+
+* Todd Vierling for contributions for NetBSD ports.
+
+* Andrew Waterman for contributing the RISC-V port, as well as maintaining it.
+
+* Jonathan Wakely for contributing libstdc++ Doxygen notes and XHTML
+  guidance and maintaining libstdc++.
+
+* Dean Wakerley for converting the install documentation from HTML to texinfo
+  in time for GCC 3.0.
+
+* Krister Walfridsson for random bug fixes.
+
+* Feng Wang for contributions to GNU Fortran.
+
+* Stephen M. Webb for time and effort on making libstdc++ shadow files
+  work with the tricky Solaris 8+ headers, and for pushing the build-time
+  header tree. Also, for starting and driving the ``<regex>`` effort.
+
+* John Wehle for various improvements for the x86 code generator,
+  related infrastructure improvements to help x86 code generation,
+  value range propagation and other work, WE32k port.
+
+* Ulrich Weigand for work on the s390 port.
+
+* Janus Weil for contributions to GNU Fortran.
+
+* Zack Weinberg for major work on cpplib and various other bug fixes.
+
+* Matt Welsh for help with Linux Threads support in GCJ.
+
+* Urban Widmark for help fixing java.io.
+
+* Mark Wielaard for new Java library code and his work integrating with
+  Classpath.
+
+* Dale Wiles helped port GCC to the Tahoe.
+
+* Bob Wilson from Tensilica, Inc. for the Xtensa port.
+
+* Jim Wilson for his direction via the steering committee, tackling hard
+  problems in various places that nobody else wanted to work on, strength
+  reduction and other loop optimizations.
+
+* Paul Woegerer and Tal Agmon for the CRX port.
+
+* Carlo Wood for various fixes.
+
+* Tom Wood for work on the m88k port.
+
+* Chung-Ju Wu for his work on the Andes NDS32 port.
+
+* Canqun Yang for work on GNU Fortran.
+
+* Masanobu Yuhara of Fujitsu Laboratories implemented the machine
+  description for the Tron architecture (specifically, the Gmicro).
+
+* Kevin Zachmann helped port GCC to the Tahoe.
+
+* Ayal Zaks for Swing Modulo Scheduling (SMS).
+
+* Qirun Zhang for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Xiaoqiang Zhang for work on GNU Fortran.
+
+* Gilles Zunino for help porting Java to Irix.
+
+The following people are recognized for their contributions to GNAT,
+the Ada front end of GCC:
+
+* Bernard Banner
+
+* Romain Berrendonner
+
+* Geert Bosch
+
+* Emmanuel Briot
+
+* Joel Brobecker
+
+* Ben Brosgol
+
+* Vincent Celier
+
+* Arnaud Charlet
+
+* Chien Chieng
+
+* Cyrille Comar
+
+* Cyrille Crozes
+
+* Robert Dewar
+
+* Gary Dismukes
+
+* Robert Duff
+
+* Ed Falis
+
+* Ramon Fernandez
+
+* Sam Figueroa
+
+* Vasiliy Fofanov
+
+* Michael Friess
+
+* Franco Gasperoni
+
+* Ted Giering
+
+* Matthew Gingell
+
+* Laurent Guerby
+
+* Jerome Guitton
+
+* Olivier Hainque
+
+* Jerome Hugues
+
+* Hristian Kirtchev
+
+* Jerome Lambourg
+
+* Bruno Leclerc
+
+* Albert Lee
+
+* Sean McNeil
+
+* Javier Miranda
+
+* Laurent Nana
+
+* Pascal Obry
+
+* Dong-Ik Oh
+
+* Laurent Pautet
+
+* Brett Porter
+
+* Thomas Quinot
+
+* Nicolas Roche
+
+* Pat Rogers
+
+* Jose Ruiz
+
+* Douglas Rupp
+
+* Sergey Rybin
+
+* Gail Schenker
+
+* Ed Schonberg
+
+* Nicolas Setton
+
+* Samuel Tardieu
+
+The following people are recognized for their contributions of new
+features, bug reports, testing and integration of classpath/libgcj for
+GCC version 4.1:
+
+* Lillian Angel for ``JTree`` implementation and lots Free Swing
+  additions and bug fixes.
+
+* Wolfgang Baer for ``GapContent`` bug fixes.
+
+* Anthony Balkissoon for ``JList``, Free Swing 1.5 updates and mouse event
+  fixes, lots of Free Swing work including ``JTable`` editing.
+
+* Stuart Ballard for RMI constant fixes.
+
+* Goffredo Baroncelli for ``HTTPURLConnection`` fixes.
+
+* Gary Benson for ``MessageFormat`` fixes.
+
+* Daniel Bonniot for ``Serialization`` fixes.
+
+* Chris Burdess for lots of gnu.xml and http protocol fixes, ``StAX``
+  and ``DOM xml:id`` support.
+
+* Ka-Hing Cheung for ``TreePath`` and ``TreeSelection`` fixes.
+
+* Archie Cobbs for build fixes, VM interface updates,
+  ``URLClassLoader`` updates.
+
+* Kelley Cook for build fixes.
+
+* Martin Cordova for Suggestions for better ``SocketTimeoutException``.
+
+* David Daney for ``BitSet`` bug fixes, ``HttpURLConnection``
+  rewrite and improvements.
+
+* Thomas Fitzsimmons for lots of upgrades to the gtk+ AWT and Cairo 2D
+  support. Lots of imageio framework additions, lots of AWT and Free
+  Swing bug fixes.
+
+* Jeroen Frijters for ``ClassLoader`` and nio cleanups, serialization fixes,
+  better ``Proxy`` support, bug fixes and IKVM integration.
+
+* Santiago Gala for ``AccessControlContext`` fixes.
+
+* Nicolas Geoffray for ``VMClassLoader`` and ``AccessController``
+  improvements.
+
+* David Gilbert for ``basic`` and ``metal`` icon and plaf support
+  and lots of documenting, Lots of Free Swing and metal theme
+  additions. ``MetalIconFactory`` implementation.
+
+* Anthony Green for ``MIDI`` framework, ``ALSA`` and ``DSSI``
+  providers.
+
+* Andrew Haley for ``Serialization`` and ``URLClassLoader`` fixes,
+  gcj build speedups.
+
+* Kim Ho for ``JFileChooser`` implementation.
+
+* Andrew John Hughes for ``Locale`` and net fixes, URI RFC2986
+  updates, ``Serialization`` fixes, ``Properties`` XML support and
+  generic branch work, VMIntegration guide update.
+
+* Bastiaan Huisman for ``TimeZone`` bug fixing.
+
+* Andreas Jaeger for mprec updates.
+
+* Paul Jenner for better :option:`-Werror` support.
+
+* Ito Kazumitsu for ``NetworkInterface`` implementation and updates.
+
+* Roman Kennke for ``BoxLayout``, ``GrayFilter`` and
+  ``SplitPane``, plus bug fixes all over. Lots of Free Swing work
+  including styled text.
+
+* Simon Kitching for ``String`` cleanups and optimization suggestions.
+
+* Michael Koch for configuration fixes, ``Locale`` updates, bug and
+  build fixes.
+
+* Guilhem Lavaux for configuration, thread and channel fixes and Kaffe
+  integration. JCL native ``Pointer`` updates. Logger bug fixes.
+
+* David Lichteblau for JCL support library global/local reference
+  cleanups.
+
+* Aaron Luchko for JDWP updates and documentation fixes.
+
+* Ziga Mahkovec for ``Graphics2D`` upgraded to Cairo 0.5 and new regex
+  features.
+
+* Sven de Marothy for BMP imageio support, CSS and ``TextLayout``
+  fixes. ``GtkImage`` rewrite, 2D, awt, free swing and date/time fixes and
+  implementing the Qt4 peers.
+
+* Casey Marshall for crypto algorithm fixes, ``FileChannel`` lock,
+  ``SystemLogger`` and ``FileHandler`` rotate implementations, NIO
+  ``FileChannel.map`` support, security and policy updates.
+
+* Bryce McKinlay for RMI work.
+
+* Audrius Meskauskas for lots of Free Corba, RMI and HTML work plus
+  testing and documenting.
+
+* Kalle Olavi Niemitalo for build fixes.
+
+* Rainer Orth for build fixes.
+
+* Andrew Overholt for ``File`` locking fixes.
+
+* Ingo Proetel for ``Image``, ``Logger`` and ``URLClassLoader``
+  updates.
+
+* Olga Rodimina for ``MenuSelectionManager`` implementation.
+
+* Jan Roehrich for ``BasicTreeUI`` and ``JTree`` fixes.
+
+* Julian Scheid for documentation updates and gjdoc support.
+
+* Christian Schlichtherle for zip fixes and cleanups.
+
+* Robert Schuster for documentation updates and beans fixes,
+  ``TreeNode`` enumerations and ``ActionCommand`` and various
+  fixes, XML and URL, AWT and Free Swing bug fixes.
+
+* Keith Seitz for lots of JDWP work.
+
+* Christian Thalinger for 64-bit cleanups, Configuration and VM
+  interface fixes and ``CACAO`` integration, ``fdlibm`` updates.
+
+* Gael Thomas for ``VMClassLoader`` boot packages support suggestions.
+
+* Andreas Tobler for Darwin and Solaris testing and fixing, ``Qt4``
+  support for Darwin/OS X, ``Graphics2D`` support, ``gtk+``
+  updates.
+
+* Dalibor Topic for better ``DEBUG`` support, build cleanups and
+  Kaffe integration. ``Qt4`` build infrastructure, ``SHA1PRNG``
+  and ``GdkPixbugDecoder`` updates.
+
+* Tom Tromey for Eclipse integration, generics work, lots of bug fixes
+  and gcj integration including coordinating The Big Merge.
+
+* Mark Wielaard for bug fixes, packaging and release management,
+  ``Clipboard`` implementation, system call interrupts and network
+  timeouts and ``GdkPixpufDecoder`` fixes.
+
+In addition to the above, all of which also contributed time and energy in
+testing GCC, we would like to thank the following for their contributions
+to testing:
+
+* Michael Abd-El-Malek
+
+* Thomas Arend
+
+* Bonzo Armstrong
+
+* Steven Ashe
+
+* Chris Baldwin
+
+* David Billinghurst
+
+* Jim Blandy
+
+* Stephane Bortzmeyer
+
+* Horst von Brand
+
+* Frank Braun
+
+* Rodney Brown
+
+* Sidney Cadot
+
+* Bradford Castalia
+
+* Robert Clark
+
+* Jonathan Corbet
+
+* Ralph Doncaster
+
+* Richard Emberson
+
+* Levente Farkas
+
+* Graham Fawcett
+
+* Mark Fernyhough
+
+* Robert A. French
+
+* Jörgen Freyh
+
+* Mark K. Gardner
+
+* Charles-Antoine Gauthier
+
+* Yung Shing Gene
+
+* David Gilbert
+
+* Simon Gornall
+
+* Fred Gray
+
+* John Griffin
+
+* Patrik Hagglund
+
+* Phil Hargett
+
+* Amancio Hasty
+
+* Takafumi Hayashi
+
+* Bryan W. Headley
+
+* Kevin B. Hendricks
+
+* Joep Jansen
+
+* Christian Joensson
+
+* Michel Kern
+
+* David Kidd
+
+* Tobias Kuipers
+
+* Anand Krishnaswamy
+
+* A.O.V. Le Blanc
+
+* llewelly
+
+* Damon Love
+
+* Brad Lucier
+
+* Matthias Klose
+
+* Martin Knoblauch
+
+* Rick Lutowski
+
+* Jesse Macnish
+
+* Stefan Morrell
+
+* Anon A. Mous
+
+* Matthias Mueller
+
+* Pekka Nikander
+
+* Rick Niles
+
+* Jon Olson
+
+* Magnus Persson
+
+* Chris Pollard
+
+* Richard Polton
+
+* Derk Reefman
+
+* David Rees
+
+* Paul Reilly
+
+* Tom Reilly
+
+* Torsten Rueger
+
+* Danny Sadinoff
+
+* Marc Schifer
+
+* Erik Schnetter
+
+* Wayne K. Schroll
+
+* David Schuler
+
+* Vin Shelton
+
+* Tim Souder
+
+* Adam Sulmicki
+
+* Bill Thorson
+
+* George Talbot
+
+* Pedro A. M. Vazquez
+
+* Gregory Warnes
+
+* Ian Watson
+
+* David E. Young
+
+* And many others
+
+And finally we'd like to thank everyone who uses the compiler, provides
+feedback and generally reminds us why we're doing this work in the first
+place.
\ No newline at end of file
diff --git a/doc/contribute.rst b/doc/contribute.rst
new file mode 100644
index 00000000000..643562efc63
--- /dev/null
+++ b/doc/contribute.rst
@@ -0,0 +1,21 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _contributing:
+
+Contributing to GCC Development
+-------------------------------
+
+If you would like to help pretest GCC releases to assure they work well,
+current development sources are available via Git (see
+https://gcc.gnu.org/git.html).  Source and binary snapshots are
+also available for FTP; see https://gcc.gnu.org/snapshots.html.
+
+If you would like to work on improvements to GCC, please read the
+advice at these URLs: https://gcc.gnu.org/contribute.html, https://gcc.gnu.org/contributewhy.html.
+
+for information on how to make useful contributions and avoid
+duplication of effort.  Suggested projects are listed at
+https://gcc.gnu.org/projects/.
\ No newline at end of file
diff --git a/doc/cppdiropts.rst b/doc/cppdiropts.rst
new file mode 100644
index 00000000000..91568fe5612
--- /dev/null
+++ b/doc/cppdiropts.rst
@@ -0,0 +1,217 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -I {dir}, -iquote {dir}, -isystem {dir}, -idirafter {dir}
+
+  Add the directory :samp:`{dir}` to the list of directories to be searched
+  for header files during preprocessing.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+  If :samp:`{dir}` begins with :samp:`=` or ``$SYSROOT``, then the :samp:`=`
+  or ``$SYSROOT`` is replaced by the sysroot prefix; see
+  :option:`--sysroot` and :option:`-isysroot`.
+
+  Directories specified with :option:`-iquote` apply only to the quote
+  form of the directive, ``#include "file"``.
+  Directories specified with :option:`-I`, :option:`-isystem`,
+  or :option:`-idirafter` apply to lookup for both the
+  ``#include "file"`` and
+  ``#include <file>`` directives.
+
+  You can specify any number or combination of these options on the
+  command line to search for header files in several directories.
+  The lookup order is as follows:
+
+  * For the quote form of the include directive, the directory of the current
+    file is searched first.
+
+  * For the quote form of the include directive, the directories specified
+    by :option:`-iquote` options are searched in left-to-right order,
+    as they appear on the command line.
+
+  * Directories specified with :option:`-I` options are scanned in
+    left-to-right order.
+
+  * Directories specified with :option:`-isystem` options are scanned in
+    left-to-right order.
+
+  * Standard system directories are scanned.
+
+  * Directories specified with :option:`-idirafter` options are scanned in
+    left-to-right order.
+
+  You can use :option:`-I` to override a system header
+  file, substituting your own version, since these directories are
+  searched before the standard system header file directories.
+  However, you should
+  not use this option to add directories that contain vendor-supplied
+  system header files; use :option:`-isystem` for that.
+
+  The :option:`-isystem` and :option:`-idirafter` options also mark the directory
+  as a system directory, so that it gets the same special treatment that
+  is applied to the standard system directories.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+  If a standard system include directory, or a directory specified with
+  :option:`-isystem`, is also specified with :option:`-I`, the :option:`-I`
+  option is ignored.  The directory is still searched but as a
+  system directory at its normal position in the system include chain.
+  This is to ensure that GCC's procedure to fix buggy system headers and
+  the ordering for the ``#include_next`` directive are not inadvertently
+  changed.
+  If you really need to change the search order for system directories,
+  use the :option:`-nostdinc` and/or :option:`-isystem` options.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+.. option:: -I-
+
+  Split the include path.
+  This option has been deprecated.  Please use :option:`-iquote` instead for
+  :option:`-I` directories before the :option:`-I-` and remove the :option:`-I-`
+  option.
+
+  Any directories specified with :option:`-I`
+  options before :option:`-I-` are searched only for headers requested with
+  ``#include "file"`` ; they are not searched for
+  ``#include <file>``.  If additional directories are
+  specified with :option:`-I` options after the :option:`-I-`, those
+  directories are searched for all :samp:`#include` directives.
+
+  In addition, :option:`-I-` inhibits the use of the directory of the current
+  file directory as the first search directory for ``#include
+  "file"``.  There is no way to override this effect of :option:`-I-`.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+
+.. option:: -iprefix {prefix}
+
+  Specify :samp:`{prefix}` as the prefix for subsequent :option:`-iwithprefix`
+  options.  If the prefix represents a directory, you should include the
+  final :samp:`/`.
+
+.. option:: -iwithprefix {dir}, -iwithprefixbefore {dir}
+
+  Append :samp:`{dir}` to the prefix specified previously with
+  :option:`-iprefix`, and add the resulting directory to the include search
+  path.  :option:`-iwithprefixbefore` puts it in the same place :option:`-I`
+  would; :option:`-iwithprefix` puts it where :option:`-idirafter` would.
+
+.. option:: -isysroot {dir}
+
+  This option is like the :option:`--sysroot` option, but applies only to
+  header files (except for Darwin targets, where it applies to both header
+  files and libraries).  See the :option:`--sysroot` option for more
+  information.
+
+.. option:: -imultilib {dir}
+
+  Use :samp:`{dir}` as a subdirectory of the directory containing
+  target-specific C++ headers.
+
+.. option:: -nostdinc
+
+  Do not search the standard system directories for header files.
+  Only the directories explicitly specified with :option:`-I`,
+  :option:`-iquote`, :option:`-isystem`, and/or :option:`-idirafter`
+  options (and the directory of the current file, if appropriate)
+  are searched.
+
+.. option:: -nostdinc++
+
+  Do not search for header files in the C++-specific standard directories,
+  but do still search the other standard directories.  (This option is
+  used when building the C++ library.)
+
+.. option:: -Wcomment, -Wcomments
+
+  Warn whenever a comment-start sequence :samp:`/*` appears in a :samp:`/*`
+  comment, or whenever a backslash-newline appears in a :samp:`//` comment.
+  This warning is enabled by :option:`-Wall`.
+
+.. option:: -Wtrigraphs
+
+.. _wtrigraphs:
+
+  Warn if any trigraphs are encountered that might change the meaning of
+  the program.  Trigraphs within comments are not warned about,
+  except those that would form escaped newlines.
+
+  This option is implied by :option:`-Wall`.  If :option:`-Wall` is not
+  given, this option is still enabled unless trigraphs are enabled.  To
+  get trigraph conversion without warnings, but get the other
+  :option:`-Wall` warnings, use :samp:`-trigraphs -Wall -Wno-trigraphs`.
+
+.. option:: -Wundef
+
+  Warn if an undefined identifier is evaluated in an ``#if`` directive.
+  Such identifiers are replaced with zero.
+
+.. option:: -Wno-undef
+
+  Default setting; overrides :option:`-Wundef`.
+
+.. option:: -Wexpansion-to-defined
+
+  Warn whenever :samp:`defined` is encountered in the expansion of a macro
+  (including the case where the macro is expanded by an :samp:`#if` directive).
+  Such usage is not portable.
+  This warning is also enabled by :option:`-Wpedantic` and :option:`-Wextra`.
+
+.. option:: -Wunused-macros
+
+  Warn about macros defined in the main file that are unused.  A macro
+  is :dfn:`used` if it is expanded or tested for existence at least once.
+  The preprocessor also warns if the macro has not been used at the
+  time it is redefined or undefined.
+
+  Built-in macros, macros defined on the command line, and macros
+  defined in include files are not warned about.
+
+  .. note::
+
+    If a macro is actually used, but only used in skipped
+    conditional blocks, then the preprocessor reports it as unused.  To avoid the
+    warning in such a case, you might improve the scope of the macro's
+    definition by, for example, moving it into the first skipped block.
+    Alternatively, you could provide a dummy use with something like:
+
+  .. code-block:: c++
+
+    #if defined the_macro_causing_the_warning
+    #endif
+
+.. option:: -Wno-endif-labels
+
+  Do not warn whenever an ``#else`` or an ``#endif`` are followed by text.
+  This sometimes happens in older programs with code of the form
+
+  .. code-block:: c++
+
+    #if FOO
+    ...
+    #else FOO
+    ...
+    #endif FOO
+
+  The second and third ``FOO`` should be in comments.
+  This warning is on by default.
+
+.. option:: -Wendif-labels
+
+  Default setting; overrides :option:`-Wno-endif-labels`.
\ No newline at end of file
diff --git a/doc/cppenv.rst b/doc/cppenv.rst
new file mode 100644
index 00000000000..f27338cfa2f
--- /dev/null
+++ b/doc/cppenv.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. envvar:: CPATH, C_INCLUDE_PATH, CPLUS_INCLUDE_PATH, OBJC_INCLUDE_PATH
+
+  .. Commented out until ObjC++ is part of GCC:
+     @itemx OBJCPLUS_INCLUDE_PATH
+
+  Each variable's value is a list of directories separated by a special
+  character, much like :envvar:`PATH`, in which to look for header files.
+  The special character, ``PATH_SEPARATOR``, is target-dependent and
+  determined at GCC build time.  For Microsoft Windows-based targets it is a
+  semicolon, and for almost all other targets it is a colon.
+
+  :envvar:`CPATH` specifies a list of directories to be searched as if
+  specified with :option:`-I`, but after any paths given with :option:`-I`
+  options on the command line.  This environment variable is used
+  regardless of which language is being preprocessed.
+
+  The remaining environment variables apply only when preprocessing the
+  particular language indicated.  Each specifies a list of directories
+  to be searched as if specified with :option:`-isystem`, but after any
+  paths given with :option:`-isystem` options on the command line.
+
+  In all these variables, an empty element instructs the compiler to
+  search its current working directory.  Empty elements can appear at the
+  beginning or end of a path.  For instance, if the value of
+  :envvar:`CPATH` is ``:/special/include``, that has the same
+  effect as :samp:`-I. -I/special/include`.
+
+  .. only:: cpp
+
+    See also :ref:`search-path`.
+
+.. index:: dependencies for make as output
+
+.. envvar:: DEPENDENCIES_OUTPUT
+
+  If this variable is set, its value specifies how to output
+  dependencies for Make based on the non-system header files processed
+  by the compiler.  System header files are ignored in the dependency
+  output.
+
+  The value of :envvar:`DEPENDENCIES_OUTPUT` can be just a file name, in
+  which case the Make rules are written to that file, guessing the target
+  name from the source file name.  Or the value can have the form
+  :samp:`{file}{target}`, in which case the rules are written to
+  file :samp:`{file}` using :samp:`{target}` as the target name.
+
+  In other words, this environment variable is equivalent to combining
+  the options :option:`-MM` and :option:`-MF`
+
+  .. only:: cpp
+
+    (see :ref:`invocation`),
+
+  .. only:: not cpp
+
+    (see :ref:`preprocessor-options`),
+
+  with an optional :option:`-MT` switch too.
+
+.. index:: dependencies for make as output
+
+.. envvar:: SUNPRO_DEPENDENCIES
+
+  This variable is the same as :envvar:`DEPENDENCIES_OUTPUT` (see above),
+  except that system header files are not ignored, so it implies
+  :option:`-M` rather than :option:`-MM`.  However, the dependence on the
+  main input file is omitted.
+
+  .. only:: cpp
+
+    See :ref:`invocation`.
+
+  .. only:: not cpp
+
+    See :ref:`preprocessor-options`.
+
+.. envvar:: SOURCE_DATE_EPOCH
+
+  If this variable is set, its value specifies a UNIX timestamp to be
+  used in replacement of the current date and time in the ``__DATE__``
+  and ``__TIME__`` macros, so that the embedded timestamps become
+  reproducible.
+
+  The value of :envvar:`SOURCE_DATE_EPOCH` must be a UNIX timestamp,
+  defined as the number of seconds (excluding leap seconds) since
+  01 Jan 1970 00:00:00 represented in ASCII; identical to the output of
+  ``date +%s`` on GNU/Linux and other systems that support the
+  ``%s`` extension in the ``date`` command.
+
+  The value should be a known timestamp such as the last modification
+  time of the source or package and it should be set by the build
+  process.
\ No newline at end of file
diff --git a/doc/cppopts.rst b/doc/cppopts.rst
new file mode 100644
index 00000000000..60d663e35d8
--- /dev/null
+++ b/doc/cppopts.rst
@@ -0,0 +1,556 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -D {name}
+
+  Predefine :samp:`{name}` as a macro, with definition ``1``.
+
+.. option:: -D name=definition
+
+  The contents of :samp:`{definition}` are tokenized and processed as if
+  they appeared during translation phase three in a :samp:`#define`
+  directive.  In particular, the definition is truncated by
+  embedded newline characters.
+
+  If you are invoking the preprocessor from a shell or shell-like
+  program you may need to use the shell's quoting syntax to protect
+  characters such as spaces that have a meaning in the shell syntax.
+
+  If you wish to define a function-like macro on the command line, write
+  its argument list with surrounding parentheses before the equals sign
+  (if any).  Parentheses are meaningful to most shells, so you should
+  quote the option.  With :command:`sh` and :command:`csh`,
+  :option:`-D'name(args...)=definition'` works.
+
+  :option:`-D` and :option:`-U` options are processed in the order they
+  are given on the command line.  All :option:`-imacros file` and
+  :option:`-include file` options are processed after all
+  :option:`-D` and :option:`-U` options.
+
+.. option:: -U {name}
+
+  Cancel any previous definition of :samp:`{name}`, either built in or
+  provided with a :option:`-D` option.
+
+.. option:: -include {file}
+
+  Process :samp:`{file}` as if ``#include "file"`` appeared as the first
+  line of the primary source file.  However, the first directory searched
+  for :samp:`{file}` is the preprocessor's working directory *instead of*
+  the directory containing the main source file.  If not found there, it
+  is searched for in the remainder of the ``#include "..."`` search
+  chain as normal.
+
+  If multiple :option:`-include` options are given, the files are included
+  in the order they appear on the command line.
+
+.. option:: -imacros {file}
+
+  Exactly like :option:`-include`, except that any output produced by
+  scanning :samp:`{file}` is thrown away.  Macros it defines remain defined.
+  This allows you to acquire all the macros from a header without also
+  processing its declarations.
+
+  All files specified by :option:`-imacros` are processed before all files
+  specified by :option:`-include`.
+
+.. option:: -undef
+
+  Do not predefine any system-specific or GCC-specific macros.  The
+  standard predefined macros remain defined.
+
+  .. only:: cpp
+
+    See :ref:`standard-predefined-macros`.
+
+.. option:: -pthread
+
+  Define additional macros required for using the POSIX threads library.
+  You should use this option consistently for both compilation and linking.
+  This option is supported on GNU/Linux targets, most other Unix derivatives,
+  and also on x86 Cygwin and MinGW targets.
+
+.. index:: make, dependencies, make
+
+.. option:: -M
+
+  Instead of outputting the result of preprocessing, output a rule
+  suitable for :command:`make` describing the dependencies of the main
+  source file.  The preprocessor outputs one :command:`make` rule containing
+  the object file name for that source file, a colon, and the names of all
+  the included files, including those coming from :option:`-include` or
+  :option:`-imacros` command-line options.
+
+  Unless specified explicitly (with :option:`-MT` or :option:`-MQ`), the
+  object file name consists of the name of the source file with any
+  suffix replaced with object file suffix and with any leading directory
+  parts removed.  If there are many included files then the rule is
+  split into several lines using :samp:`\\` -newline.  The rule has no
+  commands.
+
+  This option does not suppress the preprocessor's debug output, such as
+  :option:`-dM`.  To avoid mixing such debug output with the dependency
+  rules you should explicitly specify the dependency output file with
+  :option:`-MF`, or use an environment variable like
+  :envvar:`DEPENDENCIES_OUTPUT` (see :ref:`environment-variables`).  Debug output
+  is still sent to the regular output stream as normal.
+
+  Passing :option:`-M` to the driver implies :option:`-E`, and suppresses
+  warnings with an implicit :option:`-w`.
+
+.. option:: -MM
+
+  Like :option:`-M` but do not mention header files that are found in
+  system header directories, nor header files that are included,
+  directly or indirectly, from such a header.
+
+  This implies that the choice of angle brackets or double quotes in an
+  :samp:`#include` directive does not in itself determine whether that
+  header appears in :option:`-MM` dependency output.
+
+.. option:: -MF {file}
+
+  When used with :option:`-M` or :option:`-MM`, specifies a
+  file to write the dependencies to.  If no :option:`-MF` switch is given
+  the preprocessor sends the rules to the same place it would send
+  preprocessed output.
+
+  When used with the driver options :option:`-MD` or :option:`-MMD`,
+  :option:`-MF` overrides the default dependency output file.
+
+  If :samp:`{file}` is :samp:`-`, then the dependencies are written to :samp:`stdout`.
+
+.. option:: -MG
+
+  In conjunction with an option such as :option:`-M` requesting
+  dependency generation, :option:`-MG` assumes missing header files are
+  generated files and adds them to the dependency list without raising
+  an error.  The dependency filename is taken directly from the
+  ``#include`` directive without prepending any path.  :option:`-MG`
+  also suppresses preprocessed output, as a missing header file renders
+  this useless.
+
+  This feature is used in automatic updating of makefiles.
+
+.. option:: -Mno-modules
+
+  Disable dependency generation for compiled module interfaces.
+
+.. option:: -MP
+
+  This option instructs CPP to add a phony target for each dependency
+  other than the main file, causing each to depend on nothing.  These
+  dummy rules work around errors :command:`make` gives if you remove header
+  files without updating the :samp:`Makefile` to match.
+
+  This is typical output:
+
+  .. code-block:: c++
+
+    test.o: test.c test.h
+
+    test.h:
+
+.. option:: -MT {target}
+
+  Change the target of the rule emitted by dependency generation.  By
+  default CPP takes the name of the main input file, deletes any
+  directory components and any file suffix such as :samp:`.c`, and
+  appends the platform's usual object suffix.  The result is the target.
+
+  An :option:`-MT` option sets the target to be exactly the string you
+  specify.  If you want multiple targets, you can specify them as a single
+  argument to :option:`-MT`, or use multiple :option:`-MT` options.
+
+  For example, ``-MT '$(objpfx)foo.o'`` might give
+
+  .. code-block:: c++
+
+    $(objpfx)foo.o: foo.c
+
+.. option:: -MQ {target}
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  Make. ``-MQ '$(objpfx)foo.o'`` gives
+
+  .. code-block:: c++
+
+    $$(objpfx)foo.o: foo.c
+
+  The default target is automatically quoted, as if it were given with
+  :option:`-MQ`.
+
+.. option:: -MD
+
+  :option:`-MD` is equivalent to :option:`-M -MF file`, except that
+  :option:`-E` is not implied.  The driver determines :samp:`{file}` based on
+  whether an :option:`-o` option is given.  If it is, the driver uses its
+  argument but with a suffix of :samp:`.d`, otherwise it takes the name
+  of the input file, removes any directory components and suffix, and
+  applies a :samp:`.d` suffix.
+
+  If :option:`-MD` is used in conjunction with :option:`-E`, any
+  :option:`-o` switch is understood to specify the dependency output file
+  (see :option:`-MF`), but if used without :option:`-E`, each :option:`-o`
+  is understood to specify a target object file.
+
+  Since :option:`-E` is not implied, :option:`-MD` can be used to generate
+  a dependency output file as a side effect of the compilation process.
+
+.. option:: -MMD
+
+  Like :option:`-MD` except mention only user header files, not system
+  header files.
+
+.. option:: -fpreprocessed
+
+  Indicate to the preprocessor that the input file has already been
+  preprocessed.  This suppresses things like macro expansion, trigraph
+  conversion, escaped newline splicing, and processing of most directives.
+  The preprocessor still recognizes and removes comments, so that you can
+  pass a file preprocessed with :option:`-C` to the compiler without
+  problems.  In this mode the integrated preprocessor is little more than
+  a tokenizer for the front ends.
+
+  :option:`-fpreprocessed` is implicit if the input file has one of the
+  extensions :samp:`.i`, :samp:`.ii` or :samp:`.mi`.  These are the
+  extensions that GCC uses for preprocessed files created by
+  :option:`-save-temps`.
+
+.. option:: -fdirectives-only
+
+  When preprocessing, handle directives, but do not expand macros.
+
+  The option's behavior depends on the :option:`-E` and :option:`-fpreprocessed`
+  options.
+
+  With :option:`-E`, preprocessing is limited to the handling of directives
+  such as ``#define``, ``#ifdef``, and ``#error``.  Other
+  preprocessor operations, such as macro expansion and trigraph
+  conversion are not performed.  In addition, the :option:`-dD` option is
+  implicitly enabled.
+
+  With :option:`-fpreprocessed`, predefinition of command line and most
+  builtin macros is disabled.  Macros such as ``__LINE__``, which are
+  contextually dependent, are handled normally.  This enables compilation of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+  With both :option:`-E` and :option:`-fpreprocessed`, the rules for
+  :option:`-fpreprocessed` take precedence.  This enables full preprocessing of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+.. option:: -fdollars-in-identifiers
+
+  Accept :samp:`$` in identifiers.
+
+  .. only:: cpp
+
+    See :ref:`identifier-characters`.
+
+.. option:: -fextended-identifiers
+
+  Accept universal character names and extended characters in
+  identifiers.  This option is enabled by default for C99 (and later C
+  standard versions) and C++.
+
+.. option:: -fno-canonical-system-headers
+
+  When preprocessing, do not shorten system header paths with canonicalization.
+
+.. option:: -fmax-include-depth={depth}
+
+  Set the maximum depth of the nested #include. The default is 200.
+
+.. option:: -ftabstop={width}
+
+  Set the distance between tab stops.  This helps the preprocessor report
+  correct column numbers in warnings or errors, even if tabs appear on the
+  line.  If the value is less than 1 or greater than 100, the option is
+  ignored.  The default is 8.
+
+.. option:: -ftrack-macro-expansion[={level}]
+
+  Track locations of tokens across macro expansions. This allows the
+  compiler to emit diagnostic about the current macro expansion stack
+  when a compilation error occurs in a macro expansion. Using this
+  option makes the preprocessor and the compiler consume more
+  memory. The :samp:`{level}` parameter can be used to choose the level of
+  precision of token location tracking thus decreasing the memory
+  consumption if necessary. Value :samp:`0` of :samp:`{level}` de-activates
+  this option. Value :samp:`1` tracks tokens locations in a
+  degraded mode for the sake of minimal memory overhead. In this mode
+  all tokens resulting from the expansion of an argument of a
+  function-like macro have the same location. Value :samp:`2` tracks
+  tokens locations completely. This value is the most memory hungry.
+  When this option is given no argument, the default parameter value is
+  :samp:`2`.
+
+  Note that ``-ftrack-macro-expansion=2`` is activated by default.
+
+.. option:: -fmacro-prefix-map={old}={new}
+
+  When preprocessing files residing in directory :samp:`{old}`,
+  expand the ``__FILE__`` and ``__BASE_FILE__`` macros as if the
+  files resided in directory :samp:`{new}` instead.  This can be used
+  to change an absolute path to a relative path by using :samp:`.` for
+  :samp:`{new}` which can result in more reproducible builds that are
+  location independent.  This option also affects
+  ``__builtin_FILE()`` during compilation.  See also
+  :option:`-ffile-prefix-map`.
+
+.. index:: character set, execution
+
+.. option:: -fexec-charset={charset}
+
+  Set the execution character set, used for string and character
+  constants.  The default is UTF-8.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. index:: character set, wide execution
+
+.. option:: -fwide-exec-charset={charset}
+
+  Set the wide execution character set, used for wide string and
+  character constants.  The default is one of UTF-32BE, UTF-32LE, UTF-16BE,
+  or UTF-16LE, whichever corresponds to the width of ``wchar_t`` and the
+  big-endian or little-endian byte order being used for code generation.  As
+  with :option:`-fexec-charset`, :samp:`{charset}` can be any encoding supported
+  by the system's ``iconv`` library routine; however, you will have
+  problems with encodings that do not fit exactly in ``wchar_t``.
+
+.. index:: character set, input
+
+.. option:: -finput-charset={charset}
+
+  Set the input character set, used for translation from the character
+  set of the input file to the source character set used by GCC.  If the
+  locale does not specify, or GCC cannot get this information from the
+  locale, the default is UTF-8.  This can be overridden by either the locale
+  or this command-line option.  Currently the command-line option takes
+  precedence if there's a conflict.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. only:: not cpp
+
+  .. option:: -fpch-deps
+
+    When using precompiled headers (see :ref:`precompiled-headers`), this flag
+    causes the dependency-output flags to also list the files from the
+    precompiled header's dependencies.  If not specified, only the
+    precompiled header are listed and not the files that were used to
+    create it, because those files are not consulted when a precompiled
+    header is used.
+
+  .. option:: -fpch-preprocess
+
+    This option allows use of a precompiled header (see :ref:`precompiled-headers`) together with :option:`-E`.  It inserts a special ``#pragma``,
+    ``#pragma GCC pch_preprocess "filename"`` in the output to mark
+    the place where the precompiled header was found, and its :samp:`{filename}`.
+    When :option:`-fpreprocessed` is in use, GCC recognizes this ``#pragma``
+    and loads the PCH.
+
+    This option is off by default, because the resulting preprocessed output
+    is only really suitable as input to GCC.  It is switched on by
+    :option:`-save-temps`.
+
+    You should not write this ``#pragma`` in your own code, but it is
+    safe to edit the filename if the PCH file is available in a different
+    location.  The filename may be absolute or it may be relative to GCC's
+    current directory.
+
+.. option:: -fworking-directory
+
+  Enable generation of linemarkers in the preprocessor output that
+  let the compiler know the current working directory at the time of
+  preprocessing.  When this option is enabled, the preprocessor
+  emits, after the initial linemarker, a second linemarker with the
+  current working directory followed by two slashes.  GCC uses this
+  directory, when it's present in the preprocessed input, as the
+  directory emitted as the current working directory in some debugging
+  information formats.  This option is implicitly enabled if debugging
+  information is enabled, but this can be inhibited with the negated
+  form :option:`-fno-working-directory`.  If the :option:`-P` flag is
+  present in the command line, this option has no effect, since no
+  ``#line`` directives are emitted whatsoever.
+
+.. option:: -fno-working-directory
+
+  Default setting; overrides :option:`-fworking-directory`.
+
+.. option:: -A {predicate}={answer}
+
+  Make an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.  This form is preferred to the older form :option:`-A
+  predicate(answer)`, which is still supported, because
+  it does not use shell special characters.
+
+  .. only:: cpp
+
+    See :ref:`obsolete-features`.
+
+.. option:: -A -predicate=answer
+
+  Cancel an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.
+
+.. option:: -C
+
+  Do not discard comments.  All comments are passed through to the output
+  file, except for comments in processed directives, which are deleted
+  along with the directive.
+
+  You should be prepared for side effects when using :option:`-C` ; it
+  causes the preprocessor to treat comments as tokens in their own right.
+  For example, comments appearing at the start of what would be a
+  directive line have the effect of turning that line into an ordinary
+  source line, since the first token on the line is no longer a :samp:`#`.
+
+.. option:: -CC
+
+  Do not discard comments, including during macro expansion.  This is
+  like :option:`-C`, except that comments contained within macros are
+  also passed through to the output file where the macro is expanded.
+
+  In addition to the side effects of the :option:`-C` option, the
+  :option:`-CC` option causes all C++-style comments inside a macro
+  to be converted to C-style comments.  This is to prevent later use
+  of that macro from inadvertently commenting out the remainder of
+  the source line.
+
+  The :option:`-CC` option is generally used to support lint comments.
+
+.. option:: -P
+
+  Inhibit generation of linemarkers in the output from the preprocessor.
+  This might be useful when running the preprocessor on something that is
+  not C code, and will be sent to a program which might be confused by the
+  linemarkers.
+
+  .. only:: cpp
+
+    See :ref:`preprocessor-output`.
+
+  .. index:: traditional C language, C language, traditional
+
+.. option:: -traditional, -traditional-cpp
+
+  Try to imitate the behavior of pre-standard C preprocessors, as
+  opposed to ISO C preprocessors.
+
+  .. only:: cpp
+
+    See :ref:`traditional-mode`.
+
+  .. only:: not cpp
+
+    See the GNU CPP manual for details.
+
+  Note that GCC does not otherwise attempt to emulate a pre-standard
+  C compiler, and these options are only supported with the :option:`-E`
+  switch, or when invoking CPP explicitly.
+
+.. option:: -trigraphs
+
+  Support ISO C trigraphs.
+  These are three-character sequences, all starting with :samp:`??`, that
+  are defined by ISO C to stand for single characters.  For example,
+  :samp:`??/` stands for :samp:`\\`, so :samp:`??/n` is a character
+  constant for a newline.
+
+  .. only:: cpp
+
+    See :ref:`initial-processing`.
+
+  .. only:: not cpp
+
+    The nine trigraphs and their replacements are
+
+    .. code-block::
+
+      Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+      Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+  By default, GCC ignores trigraphs, but in
+  standard-conforming modes it converts them.  See the :option:`-std` and
+  :option:`-ansi` options.
+
+.. option:: -remap
+
+  Enable special code to work around file systems which only permit very
+  short file names, such as MS-DOS.
+
+.. option:: -H
+
+  Print the name of each header file used, in addition to other normal
+  activities.  Each name is indented to show how deep in the
+  :samp:`#include` stack it is.  Precompiled header files are also
+  printed, even if they are found to be invalid; an invalid precompiled
+  header file is printed with :samp:`...x` and a valid one with :samp:`...!` .
+
+.. option:: -dletters
+
+  Says to make debugging dumps during compilation as specified by
+  :samp:`{letters}`.  The flags documented here are those relevant to the
+  preprocessor.  Other :samp:`{letters}` are interpreted
+  by the compiler proper, or reserved for future versions of GCC, and so
+  are silently ignored.  If you specify :samp:`{letters}` whose behavior
+  conflicts, the result is undefined.
+
+  .. only:: not cpp
+
+    See :ref:`developer-options`, for more information.
+
+  .. option:: -dM
+
+    Instead of the normal output, generate a list of :samp:`#define`
+    directives for all the macros defined during the execution of the
+    preprocessor, including predefined macros.  This gives you a way of
+    finding out what is predefined in your version of the preprocessor.
+    Assuming you have no file :samp:`foo.h`, the command
+
+    .. code-block:: c++
+
+      touch foo.h; cpp -dM foo.h
+
+    shows all the predefined macros.
+
+    .. only:: cpp
+
+      If you use :option:`-dM` without the :option:`-E` option, :option:`-dM` is
+      interpreted as a synonym for :option:`-fdump-rtl-mach`.
+      See :ref:`developer-options`.
+
+  .. option:: -dD
+
+    Like :option:`-dM` except in two respects: it does *not* include the
+    predefined macros, and it outputs *both* the :samp:`#define`
+    directives and the result of preprocessing.  Both kinds of output go to
+    the standard output file.
+
+  .. option:: -dN
+
+    Like :option:`-dD`, but emit only the macro names, not their expansions.
+
+  .. option:: -dI
+
+    Output :samp:`#include` directives in addition to the result of
+    preprocessing.
+
+  .. option:: -dU
+
+    Like :option:`-dD` except that only macros that are expanded, or whose
+    definedness is tested in preprocessor directives, are output; the
+    output is delayed until the use or test of the macro; and
+    :samp:`#undef` directives are also output for macros tested but
+    undefined at the time.
+
+.. option:: -fdebug-cpp
+
+  This option is only useful for debugging GCC.  When used from CPP or with
+  :option:`-E`, it dumps debugging information about location maps.  Every
+  token in the output is preceded by the dump of the map its location
+  belongs to.
+
+  When used from GCC without :option:`-E`, this option has no effect.
\ No newline at end of file
diff --git a/doc/cppwarnopts.rst b/doc/cppwarnopts.rst
new file mode 100644
index 00000000000..8e9e9e7276f
--- /dev/null
+++ b/doc/cppwarnopts.rst
@@ -0,0 +1,4 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
\ No newline at end of file
diff --git a/doc/favicon.ico b/doc/favicon.ico
new file mode 100644
index 00000000000..42e8969edc8
Binary files /dev/null and b/doc/favicon.ico differ
diff --git a/doc/funding.rst b/doc/funding.rst
new file mode 100644
index 00000000000..ee4daca6fd7
--- /dev/null
+++ b/doc/funding.rst
@@ -0,0 +1,47 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+Funding Free Software
+=====================
+
+If you want to have more free software a few years from now, it makes
+sense for you to help encourage people to contribute funds for its
+development.  The most effective approach known is to encourage
+commercial redistributors to donate.
+
+Users of free software systems can boost the pace of development by
+encouraging for-a-fee distributors to donate part of their selling price
+to free software developers-the Free Software Foundation, and others.
+
+The way to convince distributors to do this is to demand it and expect
+it from them.  So when you compare distributors, judge them partly by
+how much they give to free software development.  Show distributors
+they must compete to be the one who gives the most.
+
+To make this approach work, you must insist on numbers that you can
+compare, such as, 'We will donate ten dollars to the Frobnitz project
+for each disk sold.'  Don't be satisfied with a vague promise, such as
+'A portion of the profits are donated,' since it doesn't give a basis
+for comparison.
+
+Even a precise fraction 'of the profits from this disk' is not very
+meaningful, since creative accounting and unrelated business decisions
+can greatly alter what fraction of the sales price counts as profit.
+If the price you pay is $50, ten percent of the profit is probably
+less than a dollar; it might be a few cents, or nothing at all.
+
+Some redistributors do development work themselves.  This is useful too;
+but to keep everyone honest, you need to inquire how much they do, and
+what kind.  Some kinds of development make much more long-term
+difference than others.  For example, maintaining a separate version of
+a program contributes very little; maintaining the standard version of a
+program for the whole community contributes much.  Easy new ports
+contribute little, since someone else would surely do them; difficult
+ports such as adding a new CPU to the GNU Compiler Collection contribute more;
+major new features or packages contribute the most.
+
+By establishing the idea that supporting further development is 'the
+proper thing to do' when distributing free software for a fee, we can
+assure a steady flow of resources into making more free software.
\ No newline at end of file
diff --git a/doc/gcc_sphinx.py b/doc/gcc_sphinx.py
new file mode 100644
index 00000000000..2ef15aef944
--- /dev/null
+++ b/doc/gcc_sphinx.py
@@ -0,0 +1,44 @@
+# GCC Sphinx customization
+
+__version__ = '1.0'
+
+
+def setup(app):
+    app.add_object_type('gcc-attr', 'gcc-attr', objname='GCC attribute',
+                        indextemplate='pair: %s; attribute')
+    app.add_object_type('fn-attr', 'fn-attr', objname='function attribute',
+                        indextemplate='pair: %s; function attribute')
+    app.add_object_type('var-attr', 'var-attr', objname='variable attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('type-attr', 'type-attr', objname='type attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('enum-attr', 'enum-attr', objname='Enumerator attribute',
+                        indextemplate='pair: %s; enumerator attribute')
+    app.add_object_type('label-attr', 'label-attr', objname='Label attribute',
+                        indextemplate='pair: %s; label attribute')
+    app.add_object_type('gcc-param', 'gcc-param', objname='GCC parameter',
+                        indextemplate='pair: %s; parameter')
+
+    targets = (('AArch64 ', 'aarch64'), ('AMD GCN ', 'amd-gcn'), ('ARC ', 'arc'), ('ARM ', 'arm'), ('AVR ', 'avr'),
+               ('Blackfin ', 'blackfin'), ('BPF ', 'bpf'), ('C-SKY ', 'c-sky'),
+               ('Epiphany ', 'epiphany'), ('H8/300 ', 'h8-300'), ('IA-64 ', 'ia-64'), ('LoongArch', 'loongarch'), ('M32C ', 'm32c'),
+               ('M32R/D ', 'm32r-d'), ('m68k ', 'm68k'), ('MCORE ', 'mcore'), ('MeP ', 'mep'),
+               ('MicroBlaze ', 'microblaze'), ('Microsoft Windows ', 'microsoft-windows'), ('MIPS ', 'mips'),
+               ('MSP430 ', 'msp430'), ('NDS32 ', 'nds32'), ('Nios II ', 'nios-ii'), ('Nvidia PTX ', 'nvidia-ptx'),
+               ('PowerPC ', 'powerpc'), ('RISC-V ', 'risc-v'), ('RL78 ', 'rl78'), ('RX ', 'rx'), ('S/390 ', 's-390'),
+               ('SH ', 'sh'), ('Symbian OS ', 'symbian-os'), ('V850 ', 'v850'), ('Visium ', 'visium'), ('x86 ', 'x86'),
+               ('Xstormy16 ', 'xstormy16'))
+
+    for target_name, target in targets:
+        app.add_object_type(f'{target}-fn-attr', f'{target}-fn-attr', objname=f'{target_name} function attribute',
+                            indextemplate=f'pair: %s; {target_name} function attribute')
+        app.add_object_type(f'{target}-var-attr', f'{target}-var-attr', objname=f'{target_name} variable attribute',
+                            indextemplate=f'pair: %s; {target_name} variable attribute')
+        app.add_object_type(f'{target}-type-attr', f'{target}-type-attr', objname=f'{target_name} type attribute',
+                            indextemplate=f'pair: %s; {target_name} type attribute')
+
+    return dict(
+        version=__version__,
+        parallel_read_safe=True,
+        parallel_write_safe=True
+    )
diff --git a/doc/gnu.rst b/doc/gnu.rst
new file mode 100644
index 00000000000..930659b250b
--- /dev/null
+++ b/doc/gnu.rst
@@ -0,0 +1,19 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu-project:
+
+The GNU Project and GNU/Linux
+=============================
+
+The GNU Project was launched in 1984 to develop a complete Unix-like
+operating system which is free software: the GNU system.  (GNU is a
+recursive acronym for 'GNU's Not Unix'; it is pronounced
+'guh-NEW'.)  Variants of the GNU operating system, which use the
+kernel Linux, are now widely used; though these systems are often
+referred to as 'Linux', they are more accurately called GNU/Linux
+systems.
+
+For more information, see: https://www.gnu.org/ and https://www.gnu.org/gnu/linux-and-gnu.html.
\ No newline at end of file
diff --git a/doc/gnu_free_documentation_license.rst b/doc/gnu_free_documentation_license.rst
new file mode 100644
index 00000000000..5a7d110efde
--- /dev/null
+++ b/doc/gnu_free_documentation_license.rst
@@ -0,0 +1,476 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu_fdl:
+
+******************************
+GNU Free Documentation License
+******************************
+
+Version 1.3, 3 November 2008
+
+Copyright  2000, 2001, 2002, 2007, 2008  Free Software Foundation, Inc
+https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+~~~~~~~~
+
+The purpose of this License is to make a manual, textbook, or other
+functional and useful document "free" in the sense of freedom: to
+assure everyone the effective freedom to copy and redistribute it,
+with or without modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and publisher a way
+to get credit for their work, while not being considered responsible
+for modifications made by others.
+
+This License is a kind of "copyleft", which means that derivative
+works of the document must themselves be free in the same sense.  It
+complements the GNU General Public License, which is a copyleft
+license designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free
+program should come with manuals providing the same freedoms that the
+software does.  But this License is not limited to software manuals;
+it can be used for any textual work, regardless of subject matter or
+whether it is published as a printed book.  We recommend this License
+principally for works whose purpose is instruction or reference.
+
+1. APPLICABILITY AND DEFINITIONS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This License applies to any manual or other work, in any medium, that
+contains a notice placed by the copyright holder saying it can be
+distributed under the terms of this License.  Such a notice grants a
+world-wide, royalty-free license, unlimited in duration, to use that
+work under the conditions stated herein.  The **Document**, below,
+refers to any such manual or work.  Any member of the public is a
+licensee, and is addressed as "**you**".  You accept the license if you
+copy, modify or distribute the work in a way requiring permission
+under copyright law.
+
+A "**Modified Version**" of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+A "**Secondary Section**" is a named appendix or a front-matter section of
+the Document that deals exclusively with the relationship of the
+publishers or authors of the Document to the Document's overall subject
+(or to related matters) and contains nothing that could fall directly
+within that overall subject.  (Thus, if the Document is in part a
+textbook of mathematics, a Secondary Section may not explain any
+mathematics.)  The relationship could be a matter of historical
+connection with the subject or with related matters, or of legal,
+commercial, philosophical, ethical or political position regarding
+them.
+
+The "**Invariant Sections**" are certain Secondary Sections whose titles
+are designated, as being those of Invariant Sections, in the notice
+that says that the Document is released under this License.  If a
+section does not fit the above definition of Secondary then it is not
+allowed to be designated as Invariant.  The Document may contain zero
+Invariant Sections.  If the Document does not identify any Invariant
+Sections then there are none.
+
+The "**Cover Texts**" are certain short passages of text that are listed,
+as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+the Document is released under this License.  A Front-Cover Text may
+be at most 5 words, and a Back-Cover Text may be at most 25 words.
+
+A "**Transparent**" copy of the Document means a machine-readable copy,
+represented in a format whose specification is available to the
+general public, that is suitable for revising the document
+straightforwardly with generic text editors or (for images composed of
+pixels) generic paint programs or (for drawings) some widely available
+drawing editor, and that is suitable for input to text formatters or
+for automatic translation to a variety of formats suitable for input
+to text formatters.  A copy made in an otherwise Transparent file
+format whose markup, or absence of markup, has been arranged to thwart
+or discourage subsequent modification by readers is not Transparent.
+An image format is not Transparent if used for any substantial amount
+of text.  A copy that is not "Transparent" is called **Opaque**.
+
+Examples of suitable formats for Transparent copies include plain
+ASCII without markup, Texinfo input format, LaTeX input format, SGML
+or XML using a publicly available DTD, and standard-conforming simple
+HTML, PostScript or PDF designed for human modification.  Examples of
+transparent image formats include PNG, XCF and JPG.  Opaque formats
+include proprietary formats that can be read and edited only by
+proprietary word processors, SGML or XML for which the DTD and/or
+processing tools are not generally available, and the
+machine-generated HTML, PostScript or PDF produced by some word
+processors for output purposes only.
+
+The "**Title Page**" means, for a printed book, the title page itself,
+plus such following pages as are needed to hold, legibly, the material
+this License requires to appear in the title page.  For works in
+formats which do not have any title page as such, "Title Page" means
+the text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+The "**publisher**" means any person or entity that distributes
+copies of the Document to the public.
+
+A section "**Entitled XYZ**" means a named subunit of the Document whose
+title either is precisely XYZ or contains XYZ in parentheses following
+text that translates XYZ in another language.  (Here XYZ stands for a
+specific section name mentioned below, such as "**Acknowledgements**",
+"**Dedications**", "**Endorsements**", or "**History**".)
+To "**Preserve the Title**"
+of such a section when you modify the Document means that it remains a
+section "Entitled XYZ" according to this definition.
+
+The Document may include Warranty Disclaimers next to the notice which
+states that this License applies to the Document.  These Warranty
+Disclaimers are considered to be included by reference in this
+License, but only as regards disclaiming warranties: any other
+implication that these Warranty Disclaimers may have is void and has
+no effect on the meaning of this License.
+
+2. VERBATIM COPYING
+~~~~~~~~~~~~~~~~~~~
+
+You may copy and distribute the Document in any medium, either
+commercially or noncommercially, provided that this License, the
+copyright notices, and the license notice saying this License applies
+to the Document are reproduced in all copies, and that you add no other
+conditions whatsoever to those of this License.  You may not use
+technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute.  However, you may accept
+compensation in exchange for copies.  If you distribute a large enough
+number of copies you must also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+3. COPYING IN QUANTITY
+~~~~~~~~~~~~~~~~~~~~~~
+
+If you publish printed copies (or copies in media that commonly have
+printed covers) of the Document, numbering more than 100, and the
+Document's license notice requires Cover Texts, you must enclose the
+copies in covers that carry, clearly and legibly, all these Cover
+Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+the back cover.  Both covers must also clearly and legibly identify
+you as the publisher of these copies.  The front cover must present
+the full title with all words of the title equally prominent and
+visible.  You may add other material on the covers in addition.
+Copying with changes limited to the covers, as long as they preserve
+the title of the Document and satisfy these conditions, can be treated
+as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute Opaque copies of the Document numbering
+more than 100, you must either include a machine-readable Transparent
+copy along with each Opaque copy, or state in or with each Opaque copy
+a computer-network location from which the general network-using
+public has access to download using public-standard network protocols
+a complete Transparent copy of the Document, free of added material.
+If you use the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity, to ensure
+that this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you distribute an
+Opaque copy (directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the authors of the
+Document well before redistributing any large number of copies, to give
+them a chance to provide you with an updated version of the Document.
+
+4. MODIFICATIONS
+~~~~~~~~~~~~~~~~
+
+You may copy and distribute a Modified Version of the Document under
+the conditions of sections 2 and 3 above, provided that you release
+the Modified Version under precisely this License, with the Modified
+Version filling the role of the Document, thus licensing distribution
+and modification of the Modified Version to whoever possesses a copy
+of it.  In addition, you must do these things in the Modified Version:
+
+A. Use in the Title Page (and on the covers, if any) a title distinct
+   from that of the Document, and from those of previous versions
+   (which should, if there were any, be listed in the History section
+   of the Document).  You may use the same title as a previous version
+   if the original publisher of that version gives permission.
+
+B. List on the Title Page, as authors, one or more persons or entities
+   responsible for authorship of the modifications in the Modified
+   Version, together with at least five of the principal authors of the
+   Document (all of its principal authors, if it has fewer than five),
+   unless they release you from this requirement.
+
+C. State on the Title page the name of the publisher of the
+   Modified Version, as the publisher.
+
+D. Preserve all the copyright notices of the Document.
+
+E. Add an appropriate copyright notice for your modifications
+   adjacent to the other copyright notices.
+
+F. Include, immediately after the copyright notices, a license notice
+   giving the public permission to use the Modified Version under the
+   terms of this License, in the form shown in the Addendum below.
+
+G. Preserve in that license notice the full lists of Invariant Sections
+   and required Cover Texts given in the Document's license notice.
+H. Include an unaltered copy of this License.
+
+I. Preserve the section Entitled "History", Preserve its Title, and add
+   to it an item stating at least the title, year, new authors, and
+   publisher of the Modified Version as given on the Title Page.  If
+   there is no section Entitled "History" in the Document, create one
+   stating the title, year, authors, and publisher of the Document as
+   given on its Title Page, then add an item describing the Modified
+   Version as stated in the previous sentence.
+
+J. Preserve the network location, if any, given in the Document for
+   public access to a Transparent copy of the Document, and likewise
+   the network locations given in the Document for previous versions
+   it was based on.  These may be placed in the "History" section.
+   You may omit a network location for a work that was published at
+   least four years before the Document itself, or if the original
+   publisher of the version it refers to gives permission.
+
+K. For any section Entitled "Acknowledgements" or "Dedications",
+   Preserve the Title of the section, and preserve in the section all
+   the substance and tone of each of the contributor acknowledgements
+   and/or dedications given therein.
+
+L. Preserve all the Invariant Sections of the Document,
+   unaltered in their text and in their titles.  Section numbers
+   or the equivalent are not considered part of the section titles.
+
+M. Delete any section Entitled "Endorsements".  Such a section
+   may not be included in the Modified Version.
+
+N. Do not retitle any existing section to be Entitled "Endorsements"
+   or to conflict in title with any Invariant Section.
+
+O. Preserve any Warranty Disclaimers.
+
+If the Modified Version includes new front-matter sections or
+appendices that qualify as Secondary Sections and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant.  To do this, add their titles to the
+list of Invariant Sections in the Modified Version's license notice.
+These titles must be distinct from any other section titles.
+
+You may add a section Entitled "Endorsements", provided it contains
+nothing but endorsements of your Modified Version by various
+parties---for example, statements of peer review or that the text has
+been approved by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover Text, and a
+passage of up to 25 words as a Back-Cover Text, to the end of the list
+of Cover Texts in the Modified Version.  Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or
+through arrangements made by) any one entity.  If the Document already
+includes a cover text for the same cover, previously added by you or
+by arrangement made by the same entity you are acting on behalf of,
+you may not add another; but you may replace the old one, on explicit
+permission from the previous publisher that added the old one.
+
+The author(s) and publisher(s) of the Document do not by this License
+give permission to use their names for publicity for or to assert or
+imply endorsement of any Modified Version.
+
+5. COMBINING DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~
+
+You may combine the Document with other documents released under this
+License, under the terms defined in section 4 above for modified
+versions, provided that you include in the combination all of the
+Invariant Sections of all of the original documents, unmodified, and
+list them all as Invariant Sections of your combined work in its
+license notice, and that you preserve all their Warranty Disclaimers.
+
+The combined work need only contain one copy of this License, and
+multiple identical Invariant Sections may be replaced with a single
+copy.  If there are multiple Invariant Sections with the same name but
+different contents, make the title of each such section unique by
+adding at the end of it, in parentheses, the name of the original
+author or publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list of
+Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections Entitled "History"
+in the various original documents, forming one section Entitled
+"History"; likewise combine any sections Entitled "Acknowledgements",
+and any sections Entitled "Dedications".  You must delete all sections
+Entitled "Endorsements".
+
+6. COLLECTIONS OF DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+You may make a collection consisting of the Document and other documents
+released under this License, and replace the individual copies of this
+License in the various documents with a single copy that is included in
+the collection, provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+7. AGGREGATION WITH INDEPENDENT WORKS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A compilation of the Document or its derivatives with other separate
+and independent documents or works, in or on a volume of a storage or
+distribution medium, is called an "aggregate" if the copyright
+resulting from the compilation is not used to limit the legal rights
+of the compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License does not
+apply to the other works in the aggregate which are not themselves
+derivative works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to these
+copies of the Document, then if the Document is less than one half of
+the entire aggregate, the Document's Cover Texts may be placed on
+covers that bracket the Document within the aggregate, or the
+electronic equivalent of covers if the Document is in electronic form.
+Otherwise they must appear on printed covers that bracket the whole
+aggregate.
+
+8. TRANSLATION
+~~~~~~~~~~~~~~
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of section 4.
+Replacing Invariant Sections with translations requires special
+permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections.  You may include a
+translation of this License, and all the license notices in the
+Document, and any Warranty Disclaimers, provided that you also include
+the original English version of this License and the original versions
+of those notices and disclaimers.  In case of a disagreement between
+the translation and the original version of this License or a notice
+or disclaimer, the original version will prevail.
+
+If a section in the Document is Entitled "Acknowledgements",
+"Dedications", or "History", the requirement (section 4) to Preserve
+its Title (section 1) will typically require changing the actual
+title.
+
+9. TERMINATION
+~~~~~~~~~~~~~~
+
+You may not copy, modify, sublicense, or distribute the Document
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense, or distribute it is void, and
+will automatically terminate your rights under this License.
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, receipt of a copy of some or all of the same material does
+not give you any rights to use it.
+
+10. FUTURE REVISIONS OF THIS LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The Free Software Foundation may publish new, revised versions
+of the GNU Free Documentation License from time to time.  Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.  See
+https://www.gnu.org/copyleft/.
+
+Each version of the License is given a distinguishing version number.
+If the Document specifies that a particular numbered version of this
+License "or any later version" applies to it, you have the option of
+following the terms and conditions either of that specified version or
+of any later version that has been published (not as a draft) by the
+Free Software Foundation.  If the Document does not specify a version
+number of this License, you may choose any version ever published (not
+as a draft) by the Free Software Foundation.  If the Document
+specifies that a proxy can decide which future versions of this
+License can be used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version for the
+Document.
+
+11. RELICENSING
+~~~~~~~~~~~~~~~
+
+"Massive Multiauthor Collaboration Site" (or "MMC Site") means any
+World Wide Web server that publishes copyrightable works and also
+provides prominent facilities for anybody to edit those works.  A
+public wiki that anybody can edit is an example of such a server.  A
+"Massive Multiauthor Collaboration" (or "MMC") contained in the
+site means any set of copyrightable works thus published on the MMC
+site.
+
+"CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
+license published by Creative Commons Corporation, a not-for-profit
+corporation with a principal place of business in San Francisco,
+California, as well as future copyleft versions of that license
+published by that same organization.
+
+"Incorporate" means to publish or republish a Document, in whole or
+in part, as part of another Document.
+
+An MMC is "eligible for relicensing" if it is licensed under this
+License, and if all works that were first published under this License
+somewhere other than this MMC, and subsequently incorporated in whole
+or in part into the MMC, (1) had no cover texts or invariant sections,
+and (2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained in the site
+under CC-BY-SA on the same site at any time before August 1, 2009,
+provided the MMC is eligible for relicensing.
+
+ADDENDUM: How to use this License for your documents
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and
+license notices just after the title page:
+
+    Copyright © YEAR  YOUR NAME.
+    Permission is granted to copy, distribute and/or modify this document
+    under the terms of the GNU Free Documentation License, Version 1.3
+    or any later version published by the Free Software Foundation;
+    with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+    A copy of the license is included in the section entitled "GNU
+    Free Documentation License".
+
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the "with ... Texts." line with this:
+
+    with the Invariant Sections being LIST THEIR TITLES, with the
+    Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
+
+If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of
+free software license, such as the GNU General Public License,
+to permit their use in free software.
\ No newline at end of file
diff --git a/doc/gpl-3.0.rst b/doc/gpl-3.0.rst
new file mode 100644
index 00000000000..07ffd72b375
--- /dev/null
+++ b/doc/gpl-3.0.rst
@@ -0,0 +1,707 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU GENERAL PUBLIC LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Version 3, 29 June 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+########
+
+The GNU General Public License is a free, copyleft license for software
+and other kinds of works.
+
+The licenses for most software and other practical works are designed to
+take away your freedom to share and change the works. By contrast, the
+GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users. We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
+your programs, too.
+
+When we speak of free software, we are referring to freedom, not price.
+Our General Public Licenses are designed to make sure that you have the
+freedom to distribute copies of free software (and charge for them if
+you wish), that you receive source code or can get it if you want it,
+that you can change the software or use pieces of it in new free
+programs, and that you know you can do these things.
+
+To protect your rights, we need to prevent others from denying you these
+rights or asking you to surrender the rights. Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+For example, if you distribute copies of such a program, whether gratis
+or for a fee, you must pass on to the recipients the same freedoms that
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+TERMS AND CONDITIONS
+####################
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+7. Additional Terms.
+^^^^^^^^^^^^^^^^^^^^
+
+"Additional permissions" are terms that supplement the terms of this
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+Additional permissions that are applicable to the entire Program shall
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+^^^^^^^^^^^^^^^
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+9. Acceptance Not Required for Having Copies.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+11. Patents.
+^^^^^^^^^^^^
+
+A "contributor" is a copyright holder who authorizes use under this
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+A contributor's "essential patent claims" are all patent claims owned or
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+
+Nothing in this License shall be construed as excluding or limiting any
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+
+12. No Surrender of Others' Freedom.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If conditions are imposed on you (whether by court order, agreement or
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+
+13. Use with the GNU Affero General Public License.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Notwithstanding any other provision of this License, you have permission
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+
+14. Revised Versions of this License.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The Free Software Foundation may publish revised and/or new versions of
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+Each version is given a distinguishing version number. If the Program
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+If the Program specifies that a proxy can decide which future versions
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+Later license versions may give you additional or different permissions.
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+15. Disclaimer of Warranty.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
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+
+16. Limitation of Liability.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+
+17. Interpretation of Sections 15 and 16.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If the disclaimer of warranty and limitation of liability provided above
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+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+#############################################
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
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+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+::
+
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+
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+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice
+like this when it starts in an interactive mode:
+
+::
+
+        <program>  Copyright (C) <year>  <name of author>
+        This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+        This is free software, and you are welcome to redistribute it
+        under certain conditions; type `show c' for details.
+
+The hypothetical commands \`show w' and \`show c' should show the
+appropriate parts of the General Public License. Of course, your
+program's commands might be different; for a GUI interface, you would
+use an "about box".
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow the
+GNU GPL, see https://www.gnu.org/licenses/.
+
+The GNU General Public License does not permit incorporating your
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+GNU Lesser General Public License instead of this License. But first,
+please read https://www.gnu.org/licenses/why-not-lgpl.html.
\ No newline at end of file
diff --git a/doc/indices-and-tables.rst b/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..92bf73bcb0a
--- /dev/null
+++ b/doc/indices-and-tables.rst
@@ -0,0 +1,13 @@
+.. only:: html
+
+  Indexes and tables
+  ==================
+
+  :ref:`genindex`
+
+  .. only:: development
+
+    TODO
+    ----
+
+    .. todolist::
\ No newline at end of file
diff --git a/doc/lgpl-2.1.rst b/doc/lgpl-2.1.rst
new file mode 100644
index 00000000000..845de30d8d4
--- /dev/null
+++ b/doc/lgpl-2.1.rst
@@ -0,0 +1,514 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU LESSER GENERAL PUBLIC LICENSE
+---------------------------------
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\ No newline at end of file
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diff --git a/doc/md.rst b/doc/md.rst
new file mode 100644
index 00000000000..55e0711113e
--- /dev/null
+++ b/doc/md.rst
@@ -0,0 +1,3142 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: simple constraints
+
+.. _simple-constraints:
+
+Simple Constraints
+^^^^^^^^^^^^^^^^^^
+
+The simplest kind of constraint is a string full of letters, each of
+which describes one kind of operand that is permitted.  Here are
+the letters that are allowed:
+
+whitespace
+  Whitespace characters are ignored and can be inserted at any position
+  except the first.  This enables each alternative for different operands to
+  be visually aligned in the machine description even if they have different
+  number of constraints and modifiers.
+
+  .. index:: m in constraint, memory references in constraints
+
+m
+  A memory operand is allowed, with any kind of address that the machine
+  supports in general.
+  Note that the letter used for the general memory constraint can be
+  re-defined by a back end using the ``TARGET_MEM_CONSTRAINT`` macro.
+
+  .. index:: offsettable address, o in constraint
+
+o
+  A memory operand is allowed, but only if the address is
+  :dfn:`offsettable`.  This means that adding a small integer (actually,
+  the width in bytes of the operand, as determined by its machine mode)
+  may be added to the address and the result is also a valid memory
+  address.
+
+  .. index:: autoincrement/decrement addressing
+
+  For example, an address which is constant is offsettable; so is an
+  address that is the sum of a register and a constant (as long as a
+  slightly larger constant is also within the range of address-offsets
+  supported by the machine); but an autoincrement or autodecrement
+  address is not offsettable.  More complicated indirect/indexed
+  addresses may or may not be offsettable depending on the other
+  addressing modes that the machine supports.
+
+  Note that in an output operand which can be matched by another
+  operand, the constraint letter :samp:`o` is valid only when accompanied
+  by both :samp:`<` (if the target machine has predecrement addressing)
+  and :samp:`>` (if the target machine has preincrement addressing).
+
+  .. index:: V in constraint
+
+V
+  A memory operand that is not offsettable.  In other words, anything that
+  would fit the :samp:`m` constraint but not the :samp:`o` constraint.
+
+  .. index:: < in constraint
+
+<
+  A memory operand with autodecrement addressing (either predecrement or
+  postdecrement) is allowed.  In inline ``asm`` this constraint is only
+  allowed if the operand is used exactly once in an instruction that can
+  handle the side effects.  Not using an operand with :samp:`<` in constraint
+  string in the inline ``asm`` pattern at all or using it in multiple
+  instructions isn't valid, because the side effects wouldn't be performed
+  or would be performed more than once.  Furthermore, on some targets
+  the operand with :samp:`<` in constraint string must be accompanied by
+  special instruction suffixes like ``%U0`` instruction suffix on PowerPC
+  or ``%P0`` on IA-64.
+
+  .. index:: > in constraint
+
+>
+  A memory operand with autoincrement addressing (either preincrement or
+  postincrement) is allowed.  In inline ``asm`` the same restrictions
+  as for :samp:`<` apply.
+
+  .. index:: r in constraint, registers in constraints
+
+r
+  A register operand is allowed provided that it is in a general
+  register.
+
+  .. index:: constants in constraints, i in constraint
+
+i
+  An immediate integer operand (one with constant value) is allowed.
+  This includes symbolic constants whose values will be known only at
+  assembly time or later.
+
+  .. index:: n in constraint
+
+n
+  An immediate integer operand with a known numeric value is allowed.
+  Many systems cannot support assembly-time constants for operands less
+  than a word wide.  Constraints for these operands should use :samp:`n`
+  rather than :samp:`i`.
+
+  .. index:: I in constraint
+
+:samp:`{I}, {J}, {K}, ... {P}`
+  Other letters in the range :samp:`I` through :samp:`P` may be defined in
+  a machine-dependent fashion to permit immediate integer operands with
+  explicit integer values in specified ranges.  For example, on the
+  68000, :samp:`I` is defined to stand for the range of values 1 to 8.
+  This is the range permitted as a shift count in the shift
+  instructions.
+
+  .. index:: E in constraint
+
+E
+  An immediate floating operand (expression code ``const_double``) is
+  allowed, but only if the target floating point format is the same as
+  that of the host machine (on which the compiler is running).
+
+  .. index:: F in constraint
+
+F
+  An immediate floating operand (expression code ``const_double`` or
+  ``const_vector``) is allowed.
+
+  .. index:: G in constraint, H in constraint
+
+:samp:`{G}, {H}`
+  :samp:`G` and :samp:`H` may be defined in a machine-dependent fashion to
+  permit immediate floating operands in particular ranges of values.
+
+  .. index:: s in constraint
+
+s
+  An immediate integer operand whose value is not an explicit integer is
+  allowed.
+
+  This might appear strange; if an insn allows a constant operand with a
+  value not known at compile time, it certainly must allow any known
+  value.  So why use :samp:`s` instead of :samp:`i`?  Sometimes it allows
+  better code to be generated.
+
+  For example, on the 68000 in a fullword instruction it is possible to
+  use an immediate operand; but if the immediate value is between -128
+  and 127, better code results from loading the value into a register and
+  using the register.  This is because the load into the register can be
+  done with a :samp:`moveq` instruction.  We arrange for this to happen
+  by defining the letter :samp:`K` to mean 'any integer outside the
+  range -128 to 127', and then specifying :samp:`Ks` in the operand
+  constraints.
+
+  .. index:: g in constraint
+
+g
+  Any register, memory or immediate integer operand is allowed, except for
+  registers that are not general registers.
+
+  .. index:: X in constraint
+
+X
+
+  .. only:: gccint
+
+    Any operand whatsoever is allowed, even if it does not satisfy
+    ``general_operand``.  This is normally used in the constraint of
+    a ``match_scratch`` when certain alternatives will not actually
+    require a scratch register.
+
+  .. only:: not gccint
+
+    Any operand whatsoever is allowed.
+
+  .. index:: 0 in constraint, digits in constraint
+
+:samp:`{0}, {1}, {2}, ... {9}`
+  An operand that matches the specified operand number is allowed.  If a
+  digit is used together with letters within the same alternative, the
+  digit should come last.
+
+  This number is allowed to be more than a single digit.  If multiple
+  digits are encountered consecutively, they are interpreted as a single
+  decimal integer.  There is scant chance for ambiguity, since to-date
+  it has never been desirable that :samp:`10` be interpreted as matching
+  either operand 1 *or* operand 0.  Should this be desired, one
+  can use multiple alternatives instead.
+
+  .. index:: matching constraint, constraint, matching
+
+  This is called a :dfn:`matching constraint` and what it really means is
+  that the assembler has only a single operand that fills two roles
+
+  .. only:: gccint
+
+    considered separate in the RTL insn.  For example, an add insn has two
+    input operands and one output operand in the RTL, but on most CISC
+
+  .. only:: not gccint
+
+    which ``asm`` distinguishes.  For example, an add instruction uses
+    two input operands and an output operand, but on most CISC
+
+  machines an add instruction really has only two operands, one of them an
+  input-output operand:
+
+  .. code-block::
+
+    addl #35,r12
+
+  Matching constraints are used in these circumstances.
+  More precisely, the two operands that match must include one input-only
+  operand and one output-only operand.  Moreover, the digit must be a
+  smaller number than the number of the operand that uses it in the
+  constraint.
+
+  .. only:: gccint
+
+    For operands to match in a particular case usually means that they
+    are identical-looking RTL expressions.  But in a few special cases
+    specific kinds of dissimilarity are allowed.  For example, ``*x``
+    as an input operand will match ``*x++`` as an output operand.
+    For proper results in such cases, the output template should always
+    use the output-operand's number when printing the operand.
+
+  .. index:: load address instruction, push address instruction, address constraints, p in constraint
+
+p
+  An operand that is a valid memory address is allowed.  This is
+  for 'load address' and 'push address' instructions.
+
+  .. index:: address_operand
+
+  :samp:`p` in the constraint must be accompanied by ``address_operand``
+  as the predicate in the ``match_operand``.  This predicate interprets
+  the mode specified in the ``match_operand`` as the mode of the memory
+  reference for which the address would be valid.
+
+  .. index:: other register constraints, extensible constraints
+
+other-letters
+  Other letters can be defined in machine-dependent fashion to stand for
+  particular classes of registers or other arbitrary operand types.
+  :samp:`d`, :samp:`a` and :samp:`f` are defined on the 68000/68020 to stand
+  for data, address and floating point registers.
+
+.. only:: gccint
+
+  In order to have valid assembler code, each operand must satisfy
+  its constraint.  But a failure to do so does not prevent the pattern
+  from applying to an insn.  Instead, it directs the compiler to modify
+  the code so that the constraint will be satisfied.  Usually this is
+  done by copying an operand into a register.
+
+  Contrast, therefore, the two instruction patterns that follow:
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_dup 0)
+                     (match_operand:SI 1 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has two operands, one of which must appear in two places, and
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_operand:SI 1 "general_operand" "0")
+                     (match_operand:SI 2 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has three operands, two of which are required by a constraint to be
+  identical.  If we are considering an insn of the form
+
+  .. code-block:: c++
+
+    (insn n prev next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 6) (reg:SI 109)))
+      ...)
+
+  the first pattern would not apply at all, because this insn does not
+  contain two identical subexpressions in the right place.  The pattern would
+  say, 'That does not look like an add instruction; try other patterns'.
+  The second pattern would say, 'Yes, that's an add instruction, but there
+  is something wrong with it'.  It would direct the reload pass of the
+  compiler to generate additional insns to make the constraint true.  The
+  results might look like this:
+
+  .. code-block:: c++
+
+    (insn n2 prev n
+      (set (reg:SI 3) (reg:SI 6))
+      ...)
+
+    (insn n n2 next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 3) (reg:SI 109)))
+      ...)
+
+  It is up to you to make sure that each operand, in each pattern, has
+  constraints that can handle any RTL expression that could be present for
+  that operand.  (When multiple alternatives are in use, each pattern must,
+  for each possible combination of operand expressions, have at least one
+  alternative which can handle that combination of operands.)  The
+  constraints don't need to *allow* any possible operand---when this is
+  the case, they do not constrain---but they must at least point the way to
+  reloading any possible operand so that it will fit.
+
+  * If the constraint accepts whatever operands the predicate permits,
+    there is no problem: reloading is never necessary for this operand.
+
+    For example, an operand whose constraints permit everything except
+    registers is safe provided its predicate rejects registers.
+
+    An operand whose predicate accepts only constant values is safe
+    provided its constraints include the letter :samp:`i`.  If any possible
+    constant value is accepted, then nothing less than :samp:`i` will do;
+    if the predicate is more selective, then the constraints may also be
+    more selective.
+
+  * Any operand expression can be reloaded by copying it into a register.
+    So if an operand's constraints allow some kind of register, it is
+    certain to be safe.  It need not permit all classes of registers; the
+    compiler knows how to copy a register into another register of the
+    proper class in order to make an instruction valid.
+
+    .. index:: nonoffsettable memory reference, memory reference, nonoffsettable
+
+  * A nonoffsettable memory reference can be reloaded by copying the
+    address into a register.  So if the constraint uses the letter
+    :samp:`o`, all memory references are taken care of.
+
+  * A constant operand can be reloaded by allocating space in memory to
+    hold it as preinitialized data.  Then the memory reference can be used
+    in place of the constant.  So if the constraint uses the letters
+    :samp:`o` or :samp:`m`, constant operands are not a problem.
+
+  * If the constraint permits a constant and a pseudo register used in an insn
+    was not allocated to a hard register and is equivalent to a constant,
+    the register will be replaced with the constant.  If the predicate does
+    not permit a constant and the insn is re-recognized for some reason, the
+    compiler will crash.  Thus the predicate must always recognize any
+    objects allowed by the constraint.
+
+  If the operand's predicate can recognize registers, but the constraint does
+  not permit them, it can make the compiler crash.  When this operand happens
+  to be a register, the reload pass will be stymied, because it does not know
+  how to copy a register temporarily into memory.
+
+  If the predicate accepts a unary operator, the constraint applies to the
+  operand.  For example, the MIPS processor at ISA level 3 supports an
+  instruction which adds two registers in ``SImode`` to produce a
+  ``DImode`` result, but only if the registers are correctly sign
+  extended.  This predicate for the input operands accepts a
+  ``sign_extend`` of an ``SImode`` register.  Write the constraint
+  to indicate the type of register that is required for the operand of the
+  ``sign_extend``.
+
+.. only:: not gccint
+
+  So the first alternative for the 68000's logical-or could be written as
+  ``"+m" (output) : "ir" (input)``.  The second could be ``"+r"
+  (output): "irm" (input)``.  However, the fact that two memory locations
+  cannot be used in a single instruction prevents simply using ``"+rm"
+  (output) : "irm" (input)``.  Using multi-alternatives, this might be
+  written as ``"+m,r" (output) : "ir,irm" (input)``.  This describes
+  all the available alternatives to the compiler, allowing it to choose
+  the most efficient one for the current conditions.
+
+  There is no way within the template to determine which alternative was
+  chosen.  However you may be able to wrap your ``asm`` statements with
+  builtins such as ``__builtin_constant_p`` to achieve the desired results.
+
+.. index:: multiple alternative constraints
+
+.. _multi-alternative:
+
+Multiple Alternative Constraints
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Sometimes a single instruction has multiple alternative sets of possible
+operands.  For example, on the 68000, a logical-or instruction can combine
+register or an immediate value into memory, or it can combine any kind of
+operand into a register; but it cannot combine one memory location into
+another.
+
+These constraints are represented as multiple alternatives.  An alternative
+can be described by a series of letters for each operand.  The overall
+constraint for an operand is made from the letters for this operand
+from the first alternative, a comma, the letters for this operand from
+the second alternative, a comma, and so on until the last alternative.
+All operands for a single instruction must have the same number of
+alternatives.
+
+.. only:: gccint
+
+  Here is how it is done for fullword logical-or on the 68000:
+
+  .. code-block:: c++
+
+    (define_insn "iorsi3"
+      [(set (match_operand:SI 0 "general_operand" "=m,d")
+            (ior:SI (match_operand:SI 1 "general_operand" "%0,0")
+                    (match_operand:SI 2 "general_operand" "dKs,dmKs")))]
+      ...)
+
+  The first alternative has :samp:`m` (memory) for operand 0, :samp:`0` for
+  operand 1 (meaning it must match operand 0), and :samp:`dKs` for operand
+  2.  The second alternative has :samp:`d` (data register) for operand 0,
+  :samp:`0` for operand 1, and :samp:`dmKs` for operand 2.  The :samp:`=` and
+  :samp:`%` in the constraints apply to all the alternatives; their
+  meaning is explained in the next section (see :ref:`class-preferences`).
+
+  If all the operands fit any one alternative, the instruction is valid.
+  Otherwise, for each alternative, the compiler counts how many instructions
+  must be added to copy the operands so that that alternative applies.
+  The alternative requiring the least copying is chosen.  If two alternatives
+  need the same amount of copying, the one that comes first is chosen.
+  These choices can be altered with the :samp:`?` and :samp:`!` characters:
+
+  .. index:: ? in constraint, question mark
+
+  ``?``
+    Disparage slightly the alternative that the :samp:`?` appears in,
+    as a choice when no alternative applies exactly.  The compiler regards
+    this alternative as one unit more costly for each :samp:`?` that appears
+    in it.
+
+    .. index:: ! in constraint, exclamation point
+
+  ``!``
+    Disparage severely the alternative that the :samp:`!` appears in.
+    This alternative can still be used if it fits without reloading,
+    but if reloading is needed, some other alternative will be used.
+
+    .. index:: ^ in constraint, caret
+
+  ``^``
+    This constraint is analogous to :samp:`?` but it disparages slightly
+    the alternative only if the operand with the :samp:`^` needs a reload.
+
+    .. index:: $ in constraint, dollar sign
+
+  ``$``
+    This constraint is analogous to :samp:`!` but it disparages severely
+    the alternative only if the operand with the :samp:`$` needs a reload.
+
+  When an insn pattern has multiple alternatives in its constraints, often
+  the appearance of the assembler code is determined mostly by which
+  alternative was matched.  When this is so, the C code for writing the
+  assembler code can use the variable ``which_alternative``, which is
+  the ordinal number of the alternative that was actually satisfied (0 for
+  the first, 1 for the second alternative, etc.).  See :ref:`output-statement`.
+
+.. _class-preferences:
+
+Register Class Preferences
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. only:: gccint
+
+  .. index:: class preference constraints, register class preference constraints, voting between constraint alternatives
+
+  The operand constraints have another function: they enable the compiler
+  to decide which kind of hardware register a pseudo register is best
+  allocated to.  The compiler examines the constraints that apply to the
+  insns that use the pseudo register, looking for the machine-dependent
+  letters such as :samp:`d` and :samp:`a` that specify classes of registers.
+  The pseudo register is put in whichever class gets the most 'votes'.
+  The constraint letters :samp:`g` and :samp:`r` also vote: they vote in
+  favor of a general register.  The machine description says which registers
+  are considered general.
+
+  Of course, on some machines all registers are equivalent, and no register
+  classes are defined.  Then none of this complexity is relevant.
+
+.. index:: modifiers in constraints, constraint modifier characters
+
+.. _modifiers:
+
+Constraint Modifier Characters
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. prevent bad page break with this line
+
+Here are constraint modifier characters.
+
+.. index:: = in constraint
+
+:samp:`=`
+  Means that this operand is written to by this instruction:
+  the previous value is discarded and replaced by new data.
+
+  .. index:: + in constraint
+
+:samp:`+`
+  Means that this operand is both read and written by the instruction.
+
+  When the compiler fixes up the operands to satisfy the constraints,
+  it needs to know which operands are read by the instruction and
+  which are written by it.  :samp:`=` identifies an operand which is only
+  written; :samp:`+` identifies an operand that is both read and written; all
+  other operands are assumed to only be read.
+
+  If you specify :samp:`=` or :samp:`+` in a constraint, you put it in the
+  first character of the constraint string.
+
+  .. index:: & in constraint, earlyclobber operand
+
+:samp:`&`
+  Means (in a particular alternative) that this operand is an
+  :dfn:`earlyclobber` operand, which is written before the instruction is
+  finished using the input operands.  Therefore, this operand may not lie
+  in a register that is read by the instruction or as part of any memory
+  address.
+
+  :samp:`&` applies only to the alternative in which it is written.  In
+  constraints with multiple alternatives, sometimes one alternative
+  requires :samp:`&` while others do not.  See, for example, the
+  :samp:`movdf` insn of the 68000.
+
+  An operand which is read by the instruction can be tied to an earlyclobber
+  operand if its only use as an input occurs before the early result is
+  written.  Adding alternatives of this form often allows GCC to produce
+  better code when only some of the read operands can be affected by the
+  earlyclobber. See, for example, the :samp:`mulsi3` insn of the ARM.
+
+  Furthermore, if the :dfn:`earlyclobber` operand is also a read/write
+  operand, then that operand is written only after it's used.
+
+  :samp:`&` does not obviate the need to write :samp:`=` or :samp:`+`.  As
+  :dfn:`earlyclobber` operands are always written, a read-only
+  :dfn:`earlyclobber` operand is ill-formed and will be rejected by the
+  compiler.
+
+  .. index:: % in constraint
+
+:samp:`%`
+  Declares the instruction to be commutative for this operand and the
+  following operand.  This means that the compiler may interchange the
+  two operands if that is the cheapest way to make all operands fit the
+  constraints.  :samp:`%` applies to all alternatives and must appear as
+  the first character in the constraint.  Only read-only operands can use
+  :samp:`%`.
+
+  .. only:: gccint
+
+    This is often used in patterns for addition instructions
+    that really have only two operands: the result must go in one of the
+    arguments.  Here for example, is how the 68000 halfword-add
+    instruction is defined:
+
+    .. code-block:: c++
+
+      (define_insn "addhi3"
+        [(set (match_operand:HI 0 "general_operand" "=m,r")
+           (plus:HI (match_operand:HI 1 "general_operand" "%0,0")
+                    (match_operand:HI 2 "general_operand" "di,g")))]
+        ...)
+
+  GCC can only handle one commutative pair in an asm; if you use more,
+  the compiler may fail.  Note that you need not use the modifier if
+  the two alternatives are strictly identical; this would only waste
+  time in the reload pass.
+
+  .. only:: gccint
+
+    The modifier is not operational after
+    register allocation, so the result of ``define_peephole2``
+    and ``define_split`` s performed after reload cannot rely on
+    :samp:`%` to make the intended insn match.
+
+    .. index:: # in constraint
+
+  :samp:`#`
+    Says that all following characters, up to the next comma, are to be
+    ignored as a constraint.  They are significant only for choosing
+    register preferences.
+
+    .. index:: * in constraint
+
+  :samp:`*`
+    Says that the following character should be ignored when choosing
+    register preferences.  :samp:`*` has no effect on the meaning of the
+    constraint as a constraint, and no effect on reloading.  For LRA
+    :samp:`*` additionally disparages slightly the alternative if the
+    following character matches the operand.
+
+    Here is an example: the 68000 has an instruction to sign-extend a
+    halfword in a data register, and can also sign-extend a value by
+    copying it into an address register.  While either kind of register is
+    acceptable, the constraints on an address-register destination are
+    less strict, so it is best if register allocation makes an address
+    register its goal.  Therefore, :samp:`*` is used so that the :samp:`d`
+    constraint letter (for data register) is ignored when computing
+    register preferences.
+
+    .. code-block:: c++
+
+      (define_insn "extendhisi2"
+        [(set (match_operand:SI 0 "general_operand" "=*d,a")
+              (sign_extend:SI
+               (match_operand:HI 1 "general_operand" "0,g")))]
+        ...)
+
+.. index:: machine specific constraints, constraints, machine specific
+
+.. _machine-constraints:
+
+Constraints for Particular Machines
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Whenever possible, you should use the general-purpose constraint letters
+in ``asm`` arguments, since they will convey meaning more readily to
+people reading your code.  Failing that, use the constraint letters
+that usually have very similar meanings across architectures.  The most
+commonly used constraints are :samp:`m` and :samp:`r` (for memory and
+general-purpose registers respectively; see :ref:`simple-constraints`), and
+:samp:`I`, usually the letter indicating the most common
+immediate-constant format.
+
+Each architecture defines additional constraints.  These constraints
+are used by the compiler itself for instruction generation, as well as
+for ``asm`` statements; therefore, some of the constraints are not
+particularly useful for ``asm``.  Here is a summary of some of the
+machine-dependent constraints available on some particular machines;
+it includes both constraints that are useful for ``asm`` and
+constraints that aren't.  The compiler source file mentioned in the
+table heading for each architecture is the definitive reference for
+the meanings of that architecture's constraints.
+
+.. Please keep this table alphabetized by target!
+
+AArch64 family---:samp:`{config/aarch64/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``k``
+  The stack pointer register (``SP``)
+
+``w``
+  Floating point register, Advanced SIMD vector register or SVE vector register
+
+``x``
+  Like ``w``, but restricted to registers 0 to 15 inclusive.
+
+``y``
+  Like ``w``, but restricted to registers 0 to 7 inclusive.
+
+``Upl``
+  One of the low eight SVE predicate registers (``P0`` to ``P7``)
+
+``Upa``
+  Any of the SVE predicate registers (``P0`` to ``P15``)
+
+``I``
+  Integer constant that is valid as an immediate operand in an ``ADD``
+  instruction
+
+``J``
+  Integer constant that is valid as an immediate operand in a ``SUB``
+  instruction (once negated)
+
+``K``
+  Integer constant that can be used with a 32-bit logical instruction
+
+``L``
+  Integer constant that can be used with a 64-bit logical instruction
+
+``M``
+  Integer constant that is valid as an immediate operand in a 32-bit ``MOV``
+  pseudo instruction. The ``MOV`` may be assembled to one of several different
+  machine instructions depending on the value
+
+``N``
+  Integer constant that is valid as an immediate operand in a 64-bit ``MOV``
+  pseudo instruction
+
+``S``
+  An absolute symbolic address or a label reference
+
+``Y``
+  Floating point constant zero
+
+``Z``
+  Integer constant zero
+
+``Ush``
+  The high part (bits 12 and upwards) of the pc-relative address of a symbol
+  within 4GB of the instruction
+
+``Q``
+  A memory address which uses a single base register with no offset
+
+``Ump``
+  A memory address suitable for a load/store pair instruction in SI, DI, SF and
+  DF modes
+
+AMD GCN ---:samp:`{config/gcn/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Immediate integer in the range -16 to 64
+
+``J``
+  Immediate 16-bit signed integer
+
+``Kf``
+  Immediate constant -1
+
+``L``
+  Immediate 15-bit unsigned integer
+
+``A``
+  Immediate constant that can be inlined in an instruction encoding: integer
+  -16..64, or float 0.0, +/-0.5, +/-1.0, +/-2.0,
+  +/-4.0, 1.0/(2.0\*PI)
+
+``B``
+  Immediate 32-bit signed integer that can be attached to an instruction encoding
+
+``C``
+  Immediate 32-bit integer in range -16..4294967295 (i.e. 32-bit unsigned
+  integer or :samp:`A` constraint)
+
+``DA``
+  Immediate 64-bit constant that can be split into two :samp:`A` constants
+
+``DB``
+  Immediate 64-bit constant that can be split into two :samp:`B` constants
+
+``U``
+  Any ``unspec``
+
+``Y``
+  Any ``symbol_ref`` or ``label_ref``
+
+``v``
+  VGPR register
+
+``Sg``
+  SGPR register
+
+``SD``
+  SGPR registers valid for instruction destinations, including VCC, M0 and EXEC
+
+``SS``
+  SGPR registers valid for instruction sources, including VCC, M0, EXEC and SCC
+
+``Sm``
+  SGPR registers valid as a source for scalar memory instructions (excludes M0
+  and EXEC)
+
+``Sv``
+  SGPR registers valid as a source or destination for vector instructions
+  (excludes EXEC)
+
+``ca``
+  All condition registers: SCC, VCCZ, EXECZ
+
+``cs``
+  Scalar condition register: SCC
+
+``cV``
+  Vector condition register: VCC, VCC_LO, VCC_HI
+
+``e``
+  EXEC register (EXEC_LO and EXEC_HI)
+
+``RB``
+  Memory operand with address space suitable for ``buffer_*`` instructions
+
+``RF``
+  Memory operand with address space suitable for ``flat_*`` instructions
+
+``RS``
+  Memory operand with address space suitable for ``s_*`` instructions
+
+``RL``
+  Memory operand with address space suitable for ``ds_*`` LDS instructions
+
+``RG``
+  Memory operand with address space suitable for ``ds_*`` GDS instructions
+
+``RD``
+  Memory operand with address space suitable for any ``ds_*`` instructions
+
+``RM``
+  Memory operand with address space suitable for ``global_*`` instructions
+
+ARC ---:samp:`{config/arc/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``q``
+  Registers usable in ARCompact 16-bit instructions: ``r0`` - ``r3``,
+  ``r12`` - ``r15``.  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``e``
+  Registers usable as base-regs of memory addresses in ARCompact 16-bit memory
+  instructions: ``r0`` - ``r3``, ``r12`` - ``r15``, ``sp``.
+  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``D``
+  ARC FPX (dpfp) 64-bit registers. ``D0``, ``D1``.
+
+``I``
+  A signed 12-bit integer constant.
+
+``Cal``
+  constant for arithmetic/logical operations.  This might be any constant
+  that can be put into a long immediate by the assmbler or linker without
+  involving a PIC relocation.
+
+``K``
+  A 3-bit unsigned integer constant.
+
+``L``
+  A 6-bit unsigned integer constant.
+
+``CnL``
+  One's complement of a 6-bit unsigned integer constant.
+
+``CmL``
+  Two's complement of a 6-bit unsigned integer constant.
+
+``M``
+  A 5-bit unsigned integer constant.
+
+``O``
+  A 7-bit unsigned integer constant.
+
+``P``
+  A 8-bit unsigned integer constant.
+
+``H``
+  Any const_double value.
+
+ARM family---:samp:`{config/arm/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``h``
+  In Thumb state, the core registers ``r8`` - ``r15``.
+
+``k``
+  The stack pointer register.
+
+``l``
+  In Thumb State the core registers ``r0`` - ``r7``.  In ARM state this
+  is an alias for the ``r`` constraint.
+
+``t``
+  VFP floating-point registers ``s0`` - ``s31``.  Used for 32 bit values.
+
+``w``
+  VFP floating-point registers ``d0`` - ``d31`` and the appropriate
+  subset ``d0`` - ``d15`` based on command line options.
+  Used for 64 bit values only.  Not valid for Thumb1.
+
+``y``
+  The iWMMX co-processor registers.
+
+``z``
+  The iWMMX GR registers.
+
+``G``
+  The floating-point constant 0.0
+
+``I``
+  Integer that is valid as an immediate operand in a data processing
+  instruction.  That is, an integer in the range 0 to 255 rotated by a
+  multiple of 2
+
+``J``
+  Integer in the range -4095 to 4095
+
+``K``
+  Integer that satisfies constraint :samp:`I` when inverted (ones complement)
+
+``L``
+  Integer that satisfies constraint :samp:`I` when negated (twos complement)
+
+``M``
+  Integer in the range 0 to 32
+
+``Q``
+  A memory reference where the exact address is in a single register
+  (':samp:`m`' is preferable for ``asm`` statements)
+
+``R``
+  An item in the constant pool
+
+``S``
+  A symbol in the text segment of the current file
+
+``Uv``
+  A memory reference suitable for VFP load/store insns (reg+constant offset)
+
+``Uy``
+  A memory reference suitable for iWMMXt load/store instructions.
+
+``Uq``
+  A memory reference suitable for the ARMv4 ldrsb instruction.
+
+AVR family---:samp:`{config/avr/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``l``
+  Registers from r0 to r15
+
+``a``
+  Registers from r16 to r23
+
+``d``
+  Registers from r16 to r31
+
+``w``
+  Registers from r24 to r31.  These registers can be used in :samp:`adiw` command
+
+``e``
+  Pointer register (r26--r31)
+
+``b``
+  Base pointer register (r28--r31)
+
+``q``
+  Stack pointer register (SPH:SPL)
+
+``t``
+  Temporary register r0
+
+``x``
+  Register pair X (r27:r26)
+
+``y``
+  Register pair Y (r29:r28)
+
+``z``
+  Register pair Z (r31:r30)
+
+``I``
+  Constant greater than -1, less than 64
+
+``J``
+  Constant greater than -64, less than 1
+
+``K``
+  Constant integer 2
+
+``L``
+  Constant integer 0
+
+``M``
+  Constant that fits in 8 bits
+
+``N``
+  Constant integer -1
+
+``O``
+  Constant integer 8, 16, or 24
+
+``P``
+  Constant integer 1
+
+``G``
+  A floating point constant 0.0
+
+``Q``
+  A memory address based on Y or Z pointer with displacement.
+
+Blackfin family---:samp:`{config/bfin/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  P register
+
+``d``
+  D register
+
+``z``
+  A call clobbered P register.
+
+:samp:`q{n}`
+  A single register.  If :samp:`{n}` is in the range 0 to 7, the corresponding D
+  register.  If it is ``A``, then the register P0.
+
+``D``
+  Even-numbered D register
+
+``W``
+  Odd-numbered D register
+
+``e``
+  Accumulator register.
+
+``A``
+  Even-numbered accumulator register.
+
+``B``
+  Odd-numbered accumulator register.
+
+``b``
+  I register
+
+``v``
+  B register
+
+``f``
+  M register
+
+``c``
+  Registers used for circular buffering, i.e. I, B, or L registers.
+
+``C``
+  The CC register.
+
+``t``
+  LT0 or LT1.
+
+``k``
+  LC0 or LC1.
+
+``u``
+  LB0 or LB1.
+
+``x``
+  Any D, P, B, M, I or L register.
+
+``y``
+  Additional registers typically used only in prologues and epilogues: RETS,
+  RETN, RETI, RETX, RETE, ASTAT, SEQSTAT and USP.
+
+``w``
+  Any register except accumulators or CC.
+
+``Ksh``
+  Signed 16 bit integer (in the range -32768 to 32767)
+
+``Kuh``
+  Unsigned 16 bit integer (in the range 0 to 65535)
+
+``Ks7``
+  Signed 7 bit integer (in the range -64 to 63)
+
+``Ku7``
+  Unsigned 7 bit integer (in the range 0 to 127)
+
+``Ku5``
+  Unsigned 5 bit integer (in the range 0 to 31)
+
+``Ks4``
+  Signed 4 bit integer (in the range -8 to 7)
+
+``Ks3``
+  Signed 3 bit integer (in the range -3 to 4)
+
+``Ku3``
+  Unsigned 3 bit integer (in the range 0 to 7)
+
+:samp:`P{n}`
+  Constant :samp:`{n}`, where :samp:`{n}` is a single-digit constant in the range 0 to 4.
+
+``PA``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use with either accumulator.
+
+``PB``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use only with accumulator A1.
+
+``M1``
+  Constant 255.
+
+``M2``
+  Constant 65535.
+
+``J``
+  An integer constant with exactly a single bit set.
+
+``L``
+  An integer constant with all bits set except exactly one.
+
+``H``, ``Q``
+
+  Any SYMBOL_REF.
+
+C-SKY---:samp:`{config/csky/constraints.md}`
+
+``a``
+  The mini registers r0 - r7.
+
+``b``
+  The low registers r0 - r15.
+
+``c``
+  C register.
+
+``y``
+  HI and LO registers.
+
+``l``
+  LO register.
+
+``h``
+  HI register.
+
+``v``
+  Vector registers.
+
+``z``
+  Stack pointer register (SP).
+
+``Q``
+  A memory address which uses a base register with a short offset
+  or with a index register with its scale.
+
+``W``
+  A memory address which uses a base register with a index register
+  with its scale.
+
+.. only:: gccint
+
+  The C-SKY back end supports a large set of additional constraints
+  that are only useful for instruction selection or splitting rather
+  than inline asm, such as constraints representing constant integer
+  ranges accepted by particular instruction encodings.
+  Refer to the source code for details.
+
+Epiphany---:samp:`{config/epiphany/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``U16``
+  An unsigned 16-bit constant.
+
+``K``
+  An unsigned 5-bit constant.
+
+``L``
+  A signed 11-bit constant.
+
+``Cm1``
+  A signed 11-bit constant added to -1.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cl1``
+  Left-shift of -1, i.e., a bit mask with a block of leading ones, the rest
+  being a block of trailing zeroes.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cr1``
+  Right-shift of -1, i.e., a bit mask with a trailing block of ones, the
+  rest being zeroes.  Or to put it another way, one less than a power of two.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cal``
+  Constant for arithmetic/logical operations.
+  This is like ``i``, except that for position independent code,
+  no symbols / expressions needing relocations are allowed.
+
+``Csy``
+  Symbolic constant for call/jump instruction.
+
+``Rcs``
+  The register class usable in short insns.  This is a register class
+  constraint, and can thus drive register allocation.
+  This constraint won't match unless :option:`-mprefer-short-insn-regs` is
+  in effect.
+
+``Rsc``
+  The register class of registers that can be used to hold a
+  sibcall call address.  I.e., a caller-saved register.
+
+``Rct``
+  Core control register class.
+
+``Rgs``
+  The register group usable in short insns.
+  This constraint does not use a register class, so that it only
+  passively matches suitable registers, and doesn't drive register allocation.
+
+.. only:: gccint
+
+  ``Car``
+    Constant suitable for the addsi3_r pattern.  This is a valid offset
+    For byte, halfword, or word addressing.
+
+``Rra``
+  Matches the return address if it can be replaced with the link register.
+
+``Rcc``
+  Matches the integer condition code register.
+
+``Sra``
+  Matches the return address if it is in a stack slot.
+
+``Cfm``
+  Matches control register values to switch fp mode, which are encapsulated in
+  ``UNSPEC_FP_MODE``.
+
+FRV---:samp:`{config/frv/frv.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register in the class ``ACC_REGS`` (``acc0`` to ``acc7``).
+
+``b``
+  Register in the class ``EVEN_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``c``
+  Register in the class ``CC_REGS`` (``fcc0`` to ``fcc3`` and
+  ``icc0`` to ``icc3``).
+
+``d``
+  Register in the class ``GPR_REGS`` (``gr0`` to ``gr63``).
+
+``e``
+  Register in the class ``EVEN_REGS`` (``gr0`` to ``gr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``f``
+  Register in the class ``FPR_REGS`` (``fr0`` to ``fr63``).
+
+``h``
+  Register in the class ``FEVEN_REGS`` (``fr0`` to ``fr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``l``
+  Register in the class ``LR_REG`` (the ``lr`` register).
+
+``q``
+  Register in the class ``QUAD_REGS`` (``gr2`` to ``gr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``t``
+  Register in the class ``ICC_REGS`` (``icc0`` to ``icc3``).
+
+``u``
+  Register in the class ``FCC_REGS`` (``fcc0`` to ``fcc3``).
+
+``v``
+  Register in the class ``ICR_REGS`` (``cc4`` to ``cc7``).
+
+``w``
+  Register in the class ``FCR_REGS`` (``cc0`` to ``cc3``).
+
+``x``
+  Register in the class ``QUAD_FPR_REGS`` (``fr0`` to ``fr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``z``
+  Register in the class ``SPR_REGS`` (``lcr`` and ``lr``).
+
+``A``
+  Register in the class ``QUAD_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``B``
+  Register in the class ``ACCG_REGS`` (``accg0`` to ``accg7``).
+
+``C``
+  Register in the class ``CR_REGS`` (``cc0`` to ``cc7``).
+
+``G``
+  Floating point constant zero
+
+``I``
+  6-bit signed integer constant
+
+``J``
+  10-bit signed integer constant
+
+``L``
+  16-bit signed integer constant
+
+``M``
+  16-bit unsigned integer constant
+
+``N``
+  12-bit signed integer constant that is negative---i.e. in the
+  range of -2048 to -1
+
+``O``
+  Constant zero
+
+``P``
+  12-bit signed integer constant that is greater than zero---i.e. in the
+  range of 1 to 2047.
+
+FT32---:samp:`{config/ft32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``e``
+  An offset address.
+
+``f``
+  An offset address.
+
+``O``
+  The constant zero or one
+
+``I``
+  A 16-bit signed constant (-32768 ... 32767)
+
+``w``
+  A bitfield mask suitable for bext or bins
+
+``x``
+  An inverted bitfield mask suitable for bext or bins
+
+``L``
+  A 16-bit unsigned constant, multiple of 4 (0 ... 65532)
+
+``S``
+  A 20-bit signed constant (-524288 ... 524287)
+
+``b``
+  A constant for a bitfield width (1 ... 16)
+
+``KA``
+  A 10-bit signed constant (-512 ... 511)
+
+Hewlett-Packard PA-RISC---:samp:`{config/pa/pa.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register 1
+
+``f``
+  Floating point register
+
+``q``
+  Shift amount register
+
+``x``
+  Floating point register (deprecated)
+
+``y``
+  Upper floating point register (32-bit), floating point register (64-bit)
+
+``Z``
+  Any register
+
+``I``
+  Signed 11-bit integer constant
+
+``J``
+  Signed 14-bit integer constant
+
+``K``
+  Integer constant that can be deposited with a ``zdepi`` instruction
+
+``L``
+  Signed 5-bit integer constant
+
+``M``
+  Integer constant 0
+
+``N``
+  Integer constant that can be loaded with a ``ldil`` instruction
+
+``O``
+  Integer constant whose value plus one is a power of 2
+
+``P``
+  Integer constant that can be used for ``and`` operations in ``depi``
+  and ``extru`` instructions
+
+``S``
+  Integer constant 31
+
+``U``
+  Integer constant 63
+
+``G``
+  Floating-point constant 0.0
+
+``A``
+  A ``lo_sum`` data-linkage-table memory operand
+
+``Q``
+  A memory operand that can be used as the destination operand of an
+  integer store instruction
+
+``R``
+  A scaled or unscaled indexed memory operand
+
+``T``
+  A memory operand for floating-point loads and stores
+
+``W``
+  A register indirect memory operand
+
+Intel IA-64---:samp:`{config/ia64/ia64.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register ``r0`` to ``r3`` for ``addl`` instruction
+
+``b``
+  Branch register
+
+``c``
+  Predicate register (:samp:`c` as in 'conditional')
+
+``d``
+  Application register residing in M-unit
+
+``e``
+  Application register residing in I-unit
+
+``f``
+  Floating-point register
+
+``m``
+  Memory operand.  If used together with :samp:`<` or :samp:`>`,
+  the operand can have postincrement and postdecrement which
+  require printing with :samp:`%Pn` on IA-64.
+
+``G``
+  Floating-point constant 0.0 or 1.0
+
+``I``
+  14-bit signed integer constant
+
+``J``
+  22-bit signed integer constant
+
+``K``
+  8-bit signed integer constant for logical instructions
+
+``L``
+  8-bit adjusted signed integer constant for compare pseudo-ops
+
+``M``
+  6-bit unsigned integer constant for shift counts
+
+``N``
+  9-bit signed integer constant for load and store postincrements
+
+``O``
+  The constant zero
+
+``P``
+  0 or -1 for ``dep`` instruction
+
+``Q``
+  Non-volatile memory for floating-point loads and stores
+
+``R``
+  Integer constant in the range 1 to 4 for ``shladd`` instruction
+
+``S``
+  Memory operand except postincrement and postdecrement.  This is
+  now roughly the same as :samp:`m` when not used together with :samp:`<`
+  or :samp:`>`.
+
+M32C---:samp:`{config/m32c/m32c.cc}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Rsp`` ``Rfb`` ``Rsb``
+  :samp:`$sp`, :samp:`$fb`, :samp:`$sb`.
+
+``Rcr``
+  Any control register, when they're 16 bits wide (nothing if control
+  registers are 24 bits wide)
+
+``Rcl``
+  Any control register, when they're 24 bits wide.
+
+``R0w`` ``R1w`` ``R2w`` ``R3w``
+  $r0, $r1, $r2, $r3.
+
+``R02``
+  $r0 or $r2, or $r2r0 for 32 bit values.
+
+``R13``
+  $r1 or $r3, or $r3r1 for 32 bit values.
+
+``Rdi``
+  A register that can hold a 64 bit value.
+
+``Rhl``
+  $r0 or $r1 (registers with addressable high/low bytes)
+
+``R23``
+  $r2 or $r3
+
+``Raa``
+  Address registers
+
+``Raw``
+  Address registers when they're 16 bits wide.
+
+``Ral``
+  Address registers when they're 24 bits wide.
+
+``Rqi``
+  Registers that can hold QI values.
+
+``Rad``
+  Registers that can be used with displacements ($a0, $a1, $sb).
+
+``Rsi``
+  Registers that can hold 32 bit values.
+
+``Rhi``
+  Registers that can hold 16 bit values.
+
+``Rhc``
+  Registers chat can hold 16 bit values, including all control
+  registers.
+
+``Rra``
+  $r0 through R1, plus $a0 and $a1.
+
+``Rfl``
+  The flags register.
+
+``Rmm``
+  The memory-based pseudo-registers $mem0 through $mem15.
+
+``Rpi``
+  Registers that can hold pointers (16 bit registers for r8c, m16c; 24
+  bit registers for m32cm, m32c).
+
+``Rpa``
+  Matches multiple registers in a PARALLEL to form a larger register.
+  Used to match function return values.
+
+``Is3``
+  -8 ... 7
+
+``IS1``
+  -128 ... 127
+
+``IS2``
+  -32768 ... 32767
+
+``IU2``
+  0 ... 65535
+
+``In4``
+  -8 ... -1 or 1 ... 8
+
+``In5``
+  -16 ... -1 or 1 ... 16
+
+``In6``
+  -32 ... -1 or 1 ... 32
+
+``IM2``
+  -65536 ... -1
+
+``Ilb``
+  An 8 bit value with exactly one bit set.
+
+``Ilw``
+  A 16 bit value with exactly one bit set.
+
+``Sd``
+  The common src/dest memory addressing modes.
+
+``Sa``
+  Memory addressed using $a0 or $a1.
+
+``Si``
+  Memory addressed with immediate addresses.
+
+``Ss``
+  Memory addressed using the stack pointer ($sp).
+
+``Sf``
+  Memory addressed using the frame base register ($fb).
+
+``Ss``
+  Memory addressed using the small base register ($sb).
+
+``S1``
+  $r1h
+
+LoongArch---:samp:`{config/loongarch/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``k``
+  A memory operand whose address is formed by a base register and
+  (optionally scaled) index register.
+
+``l``
+  A signed 16-bit constant.
+
+``m``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``st.w`` and ``ld.w``.
+
+``I``
+  A signed 12-bit constant (for arithmetic instructions).
+
+``K``
+  An unsigned 12-bit constant (for logic instructions).
+
+``ZB``
+  An address that is held in a general-purpose register.
+  The offset is zero.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll.w`` and ``sc.w``.
+
+MicroBlaze---:samp:`{config/microblaze/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general register (``r0`` to ``r31``).
+
+``z``
+  A status register (``rmsr``, ``$fcc1`` to ``$fcc7``).
+
+MIPS---:samp:`{config/mips/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general-purpose register.  This is equivalent to ``r`` unless
+  generating MIPS16 code, in which case the MIPS16 register set is used.
+
+``f``
+  A floating-point register (if available).
+
+``h``
+  Formerly the ``hi`` register.  This constraint is no longer supported.
+
+``l``
+  The ``lo`` register.  Use this register to store values that are
+  no bigger than a word.
+
+``x``
+  The concatenated ``hi`` and ``lo`` registers.  Use this register
+  to store doubleword values.
+
+``c``
+  A register suitable for use in an indirect jump.  This will always be
+  ``$25`` for :option:`-mabicalls`.
+
+``v``
+  Register ``$3``.  Do not use this constraint in new code;
+  it is retained only for compatibility with glibc.
+
+``y``
+  Equivalent to ``r`` ; retained for backwards compatibility.
+
+``z``
+  A floating-point condition code register.
+
+``I``
+  A signed 16-bit constant (for arithmetic instructions).
+
+``J``
+  Integer zero.
+
+``K``
+  An unsigned 16-bit constant (for logic instructions).
+
+``L``
+  A signed 32-bit constant in which the lower 16 bits are zero.
+  Such constants can be loaded using ``lui``.
+
+``M``
+  A constant that cannot be loaded using ``lui``, ``addiu``
+  or ``ori``.
+
+``N``
+  A constant in the range -65535 to -1 (inclusive).
+
+``O``
+  A signed 15-bit constant.
+
+``P``
+  A constant in the range 1 to 65535 (inclusive).
+
+``G``
+  Floating-point zero.
+
+``R``
+  An address that can be used in a non-macro load or store.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll`` and ``sc``.
+
+``ZD``
+  An address suitable for a ``prefetch`` instruction, or for any other
+  instruction with the same addressing mode as ``prefetch``.
+
+Motorola 680x0---:samp:`{config/m68k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register
+
+``d``
+  Data register
+
+``f``
+  68881 floating-point register, if available
+
+``I``
+  Integer in the range 1 to 8
+
+``J``
+  16-bit signed number
+
+``K``
+  Signed number whose magnitude is greater than 0x80
+
+``L``
+  Integer in the range -8 to -1
+
+``M``
+  Signed number whose magnitude is greater than 0x100
+
+``N``
+  Range 24 to 31, rotatert:SI 8 to 1 expressed as rotate
+
+``O``
+  16 (for rotate using swap)
+
+``P``
+  Range 8 to 15, rotatert:HI 8 to 1 expressed as rotate
+
+``R``
+  Numbers that mov3q can handle
+
+``G``
+  Floating point constant that is not a 68881 constant
+
+``S``
+  Operands that satisfy 'm' when -mpcrel is in effect
+
+``T``
+  Operands that satisfy 's' when -mpcrel is not in effect
+
+``Q``
+  Address register indirect addressing mode
+
+``U``
+  Register offset addressing
+
+``W``
+  const_call_operand
+
+``Cs``
+  symbol_ref or const
+
+``Ci``
+  const_int
+
+``C0``
+  const_int 0
+
+``Cj``
+  Range of signed numbers that don't fit in 16 bits
+
+``Cmvq``
+  Integers valid for mvq
+
+``Capsw``
+  Integers valid for a moveq followed by a swap
+
+``Cmvz``
+  Integers valid for mvz
+
+``Cmvs``
+  Integers valid for mvs
+
+``Ap``
+  push_operand
+
+``Ac``
+  Non-register operands allowed in clr
+
+Moxie---:samp:`{config/moxie/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``I``
+  A constant in the range of 0 to 255.
+
+``N``
+  A constant in the range of 0 to -255.
+
+MSP430---:samp:`{config/msp430/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R12``
+  Register R12.
+
+``R13``
+  Register R13.
+
+``K``
+  Integer constant 1.
+
+``L``
+  Integer constant -1^20..1^19.
+
+``M``
+  Integer constant 1-4.
+
+``Ya``
+  Memory references which do not require an extended MOVX instruction.
+
+``Yl``
+  Memory reference, labels only.
+
+``Ys``
+  Memory reference, stack only.
+
+NDS32---:samp:`{config/nds32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``w``
+  LOW register class $r0 to $r7 constraint for V3/V3M ISA.
+
+``l``
+  LOW register class $r0 to $r7.
+
+``d``
+  MIDDLE register class $r0 to $r11, $r16 to $r19.
+
+``h``
+  HIGH register class $r12 to $r14, $r20 to $r31.
+
+``t``
+  Temporary assist register $ta (i.e. $r15).
+
+``k``
+  Stack register $sp.
+
+``Iu03``
+  Unsigned immediate 3-bit value.
+
+``In03``
+  Negative immediate 3-bit value in the range of -7--0.
+
+``Iu04``
+  Unsigned immediate 4-bit value.
+
+``Is05``
+  Signed immediate 5-bit value.
+
+``Iu05``
+  Unsigned immediate 5-bit value.
+
+``In05``
+  Negative immediate 5-bit value in the range of -31--0.
+
+``Ip05``
+  Unsigned immediate 5-bit value for movpi45 instruction with range 16--47.
+
+``Iu06``
+  Unsigned immediate 6-bit value constraint for addri36.sp instruction.
+
+``Iu08``
+  Unsigned immediate 8-bit value.
+
+``Iu09``
+  Unsigned immediate 9-bit value.
+
+``Is10``
+  Signed immediate 10-bit value.
+
+``Is11``
+  Signed immediate 11-bit value.
+
+``Is15``
+  Signed immediate 15-bit value.
+
+``Iu15``
+  Unsigned immediate 15-bit value.
+
+``Ic15``
+  A constant which is not in the range of imm15u but ok for bclr instruction.
+
+``Ie15``
+  A constant which is not in the range of imm15u but ok for bset instruction.
+
+``It15``
+  A constant which is not in the range of imm15u but ok for btgl instruction.
+
+``Ii15``
+  A constant whose compliment value is in the range of imm15u
+  and ok for bitci instruction.
+
+``Is16``
+  Signed immediate 16-bit value.
+
+``Is17``
+  Signed immediate 17-bit value.
+
+``Is19``
+  Signed immediate 19-bit value.
+
+``Is20``
+  Signed immediate 20-bit value.
+
+``Ihig``
+  The immediate value that can be simply set high 20-bit.
+
+``Izeb``
+  The immediate value 0xff.
+
+``Izeh``
+  The immediate value 0xffff.
+
+``Ixls``
+  The immediate value 0x01.
+
+``Ix11``
+  The immediate value 0x7ff.
+
+``Ibms``
+  The immediate value with power of 2.
+
+``Ifex``
+  The immediate value with power of 2 minus 1.
+
+``U33``
+  Memory constraint for 333 format.
+
+``U45``
+  Memory constraint for 45 format.
+
+``U37``
+  Memory constraint for 37 format.
+
+Nios II family---:samp:`{config/nios2/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``J``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking only the upper 16-bits of a
+  32-bit number. Range 32-bit numbers with the lower
+  16-bits being 0.
+
+``L``
+  Integer that is valid as an immediate operand for a
+  shift instruction. Range 0 to 31.
+
+``M``
+  Integer that is valid as an immediate operand for
+  only the value 0. Can be used in conjunction with
+  the format modifier ``z`` to use ``r0``
+  instead of ``0`` in the assembly output.
+
+``N``
+  Integer that is valid as an immediate operand for
+  a custom instruction opcode. Range 0 to 255.
+
+``P``
+  An immediate operand for R2 andchi/andci instructions.
+
+``S``
+  Matches immediates which are addresses in the small
+  data section and therefore can be added to ``gp``
+  as a 16-bit immediate to re-create their 32-bit value.
+
+``U``
+  Matches constants suitable as an operand for the rdprs and
+  cache instructions.
+
+``v``
+  A memory operand suitable for Nios II R2 load/store
+  exclusive instructions.
+
+``w``
+  A memory operand suitable for load/store IO and cache
+  instructions.
+
+.. only:: gccint
+
+  ``T``
+    A ``const`` wrapped ``UNSPEC`` expression,
+    representing a supported PIC or TLS relocation.
+
+OpenRISC---:samp:`{config/or1k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``M``
+  Signed 16-bit constant shifted left 16 bits. (Used with ``l.movhi``)
+
+``O``
+  Zero
+
+.. only:: gccint
+
+  ``c``
+    Register usable for sibcalls.
+
+PDP-11---:samp:`{config/pdp11/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Floating point registers AC0 through AC3.  These can be loaded from/to
+  memory with a single instruction.
+
+``d``
+  Odd numbered general registers (R1, R3, R5).  These are used for
+  16-bit multiply operations.
+
+``D``
+  A memory reference that is encoded within the opcode, but not
+  auto-increment or auto-decrement.
+
+``f``
+  Any of the floating point registers (AC0 through AC5).
+
+``G``
+  Floating point constant 0.
+
+``h``
+  Floating point registers AC4 and AC5.  These cannot be loaded from/to
+  memory with a single instruction.
+
+``I``
+  An integer constant that fits in 16 bits.
+
+``J``
+  An integer constant whose low order 16 bits are zero.
+
+``K``
+  An integer constant that does not meet the constraints for codes
+  :samp:`I` or :samp:`J`.
+
+``L``
+  The integer constant 1.
+
+``M``
+  The integer constant -1.
+
+``N``
+  The integer constant 0.
+
+``O``
+  Integer constants 0 through 3; shifts by these
+  amounts are handled as multiple single-bit shifts rather than a single
+  variable-length shift.
+
+``Q``
+  A memory reference which requires an additional word (address or
+  offset) after the opcode.
+
+``R``
+  A memory reference that is encoded within the opcode.
+
+PowerPC and IBM RS6000---:samp:`{config/rs6000/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``r``
+  A general purpose register (GPR), ``r0``... ``r31``.
+
+``b``
+  A base register.  Like ``r``, but ``r0`` is not allowed, so
+  ``r1``... ``r31``.
+
+``f``
+  A floating point register (FPR), ``f0``... ``f31``.
+
+``d``
+  A floating point register.  This is the same as ``f`` nowadays;
+  historically ``f`` was for single-precision and ``d`` was for
+  double-precision floating point.
+
+``v``
+  An Altivec vector register (VR), ``v0``... ``v31``.
+
+``wa``
+  A VSX register (VSR), ``vs0``... ``vs63``.  This is either an
+  FPR (``vs0``... ``vs31`` are ``f0``... ``f31``) or a VR
+  (``vs32``... ``vs63`` are ``v0``... ``v31``).
+
+  When using ``wa``, you should use the ``%x`` output modifier, so that
+  the correct register number is printed.  For example:
+
+  .. code-block:: c++
+
+    asm ("xvadddp %x0,%x1,%x2"
+         : "=wa" (v1)
+         : "wa" (v2), "wa" (v3));
+
+  You should not use ``%x`` for ``v`` operands:
+
+  .. code-block:: c++
+
+    asm ("xsaddqp %0,%1,%2"
+         : "=v" (v1)
+         : "v" (v2), "v" (v3));
+
+.. only:: gccint
+
+  ``h``
+    A special register (``vrsave``, ``ctr``, or ``lr``).
+
+``c``
+  The count register, ``ctr``.
+
+``l``
+  The link register, ``lr``.
+
+``x``
+  Condition register field 0, ``cr0``.
+
+``y``
+  Any condition register field, ``cr0``... ``cr7``.
+
+.. only:: gccint
+
+  ``z``
+    The carry bit, ``XER[CA]``.
+
+  ``we``
+    Like ``wa``, if :option:`-mpower9-vector` and :option:`-m64` are used;
+    otherwise, ``NO_REGS``.
+
+  ``wn``
+    No register (``NO_REGS``).
+
+  ``wr``
+    Like ``r``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wx``
+    Like ``d``, if :option:`-mpowerpc-gfxopt` is used; otherwise, ``NO_REGS``.
+
+  ``wA``
+    Like ``b``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wB``
+    Signed 5-bit constant integer that can be loaded into an Altivec register.
+
+  ``wE``
+    Vector constant that can be loaded with the XXSPLTIB instruction.
+
+  ``wF``
+    Memory operand suitable for power8 GPR load fusion.
+
+  ``wL``
+    Int constant that is the element number mfvsrld accesses in a vector.
+
+  ``wM``
+    Match vector constant with all 1's if the XXLORC instruction is available.
+
+  ``wO``
+    Memory operand suitable for the ISA 3.0 vector d-form instructions.
+
+  ``wQ``
+    Memory operand suitable for the load/store quad instructions.
+
+  ``wS``
+    Vector constant that can be loaded with XXSPLTIB & sign extension.
+
+  ``wY``
+    A memory operand for a DS-form instruction.
+
+  ``wZ``
+    An indexed or indirect memory operand, ignoring the bottom 4 bits.
+
+``I``
+  A signed 16-bit constant.
+
+``J``
+  An unsigned 16-bit constant shifted left 16 bits (use ``L`` instead
+  for ``SImode`` constants).
+
+``K``
+  An unsigned 16-bit constant.
+
+``L``
+  A signed 16-bit constant shifted left 16 bits.
+
+.. only:: gccint
+
+  ``M``
+    An integer constant greater than 31.
+
+  ``N``
+    An exact power of 2.
+
+  ``O``
+    The integer constant zero.
+
+  ``P``
+    A constant whose negation is a signed 16-bit constant.
+
+``eI``
+  A signed 34-bit integer constant if prefixed instructions are supported.
+
+``eQ``
+  An IEEE 128-bit constant that can be loaded into a VSX register with
+  the ``lxvkq`` instruction.
+
+.. only:: gccint
+
+  ``G``
+    A floating point constant that can be loaded into a register with one
+    instruction per word.
+
+  ``H``
+    A floating point constant that can be loaded into a register using
+    three instructions.
+
+``m``
+  A memory operand.
+  Normally, ``m`` does not allow addresses that update the base register.
+  If the ``<`` or ``>`` constraint is also used, they are allowed and
+  therefore on PowerPC targets in that case it is only safe
+  to use ``m<>`` in an ``asm`` statement if that ``asm`` statement
+  accesses the operand exactly once.  The ``asm`` statement must also
+  use ``%U<opno>`` as a placeholder for the 'update' flag in the
+  corresponding load or store instruction.  For example:
+
+  .. code-block:: c++
+
+    asm ("st%U0 %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is correct but:
+
+  .. code-block:: c++
+
+    asm ("st %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is not.
+
+.. only:: gccint
+
+  ``es``
+    A 'stable' memory operand; that is, one which does not include any
+    automodification of the base register.  This used to be useful when
+    ``m`` allowed automodification of the base register, but as those
+    are now only allowed when ``<`` or ``>`` is used, ``es`` is
+    basically the same as ``m`` without ``<`` and ``>``.
+
+``Q``
+  A memory operand addressed by just a base register.
+
+.. only:: gccint
+
+  ``Y``
+    A memory operand for a DQ-form instruction.
+
+``Z``
+  A memory operand accessed with indexed or indirect addressing.
+
+.. only:: gccint
+
+  ``R``
+    An AIX TOC entry.
+
+``a``
+  An indexed or indirect address.
+
+.. only:: gccint
+
+  ``U``
+    A V.4 small data reference.
+
+  ``W``
+    A vector constant that does not require memory.
+
+  ``j``
+    The zero vector constant.
+
+PRU---:samp:`{config/pru/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  An unsigned 8-bit integer constant.
+
+``J``
+  An unsigned 16-bit integer constant.
+
+``L``
+  An unsigned 5-bit integer constant (for shift counts).
+
+``T``
+  A text segment (program memory) constant label.
+
+``Z``
+  Integer constant zero.
+
+RL78---:samp:`{config/rl78/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Int3``
+  An integer constant in the range 1 ... 7.
+
+``Int8``
+  An integer constant in the range 0 ... 255.
+
+``J``
+  An integer constant in the range -255 ... 0
+
+``K``
+  The integer constant 1.
+
+``L``
+  The integer constant -1.
+
+``M``
+  The integer constant 0.
+
+``N``
+  The integer constant 2.
+
+``O``
+  The integer constant -2.
+
+``P``
+  An integer constant in the range 1 ... 15.
+
+``Qbi``
+  The built-in compare types--eq, ne, gtu, ltu, geu, and leu.
+
+``Qsc``
+  The synthetic compare types--gt, lt, ge, and le.
+
+``Wab``
+  A memory reference with an absolute address.
+
+``Wbc``
+  A memory reference using ``BC`` as a base register, with an optional offset.
+
+``Wca``
+  A memory reference using ``AX``, ``BC``, ``DE``, or ``HL`` for the address, for calls.
+
+``Wcv``
+  A memory reference using any 16-bit register pair for the address, for calls.
+
+``Wd2``
+  A memory reference using ``DE`` as a base register, with an optional offset.
+
+``Wde``
+  A memory reference using ``DE`` as a base register, without any offset.
+
+``Wfr``
+  Any memory reference to an address in the far address space.
+
+``Wh1``
+  A memory reference using ``HL`` as a base register, with an optional one-byte offset.
+
+``Whb``
+  A memory reference using ``HL`` as a base register, with ``B`` or ``C`` as the index register.
+
+``Whl``
+  A memory reference using ``HL`` as a base register, without any offset.
+
+``Ws1``
+  A memory reference using ``SP`` as a base register, with an optional one-byte offset.
+
+``Y``
+  Any memory reference to an address in the near address space.
+
+``A``
+  The ``AX`` register.
+
+``B``
+  The ``BC`` register.
+
+``D``
+  The ``DE`` register.
+
+``R``
+  ``A`` through ``L`` registers.
+
+``S``
+  The ``SP`` register.
+
+``T``
+  The ``HL`` register.
+
+``Z08W``
+  The 16-bit ``R8`` register.
+
+``Z10W``
+  The 16-bit ``R10`` register.
+
+``Zint``
+  The registers reserved for interrupts (``R24`` to ``R31``).
+
+``a``
+  The ``A`` register.
+
+``b``
+  The ``B`` register.
+
+``c``
+  The ``C`` register.
+
+``d``
+  The ``D`` register.
+
+``e``
+  The ``E`` register.
+
+``h``
+  The ``H`` register.
+
+``l``
+  The ``L`` register.
+
+``v``
+  The virtual registers.
+
+``w``
+  The ``PSW`` register.
+
+``x``
+  The ``X`` register.
+
+RISC-V---:samp:`{config/riscv/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``I``
+  An I-type 12-bit signed immediate.
+
+``J``
+  Integer zero.
+
+``K``
+  A 5-bit unsigned immediate for CSR access instructions.
+
+``A``
+  An address that is held in a general-purpose register.
+
+``S``
+  A constraint that matches an absolute symbolic address.
+
+RX---:samp:`{config/rx/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Q``
+  An address which does not involve register indirect addressing or
+  pre/post increment/decrement addressing.
+
+``Symbol``
+  A symbol reference.
+
+``Int08``
+  A constant in the range -256 to 255, inclusive.
+
+``Sint08``
+  A constant in the range -128 to 127, inclusive.
+
+``Sint16``
+  A constant in the range -32768 to 32767, inclusive.
+
+``Sint24``
+  A constant in the range -8388608 to 8388607, inclusive.
+
+``Uint04``
+  A constant in the range 0 to 15, inclusive.
+
+S/390 and zSeries---:samp:`{config/s390/s390.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register (general purpose register except r0)
+
+``c``
+  Condition code register
+
+``d``
+  Data register (arbitrary general purpose register)
+
+``f``
+  Floating-point register
+
+``I``
+  Unsigned 8-bit constant (0--255)
+
+``J``
+  Unsigned 12-bit constant (0--4095)
+
+``K``
+  Signed 16-bit constant (-32768--32767)
+
+``L``
+  Value appropriate as displacement.
+
+  ``(0..4095)``
+    for short displacement
+
+  ``(-524288..524287)``
+    for long displacement
+
+``M``
+  Constant integer with a value of 0x7fffffff.
+
+``N``
+  Multiple letter constraint followed by 4 parameter letters.
+
+  ``0..9:``
+    number of the part counting from most to least significant
+
+  ``H,Q:``
+    mode of the part
+
+  ``D,S,H:``
+    mode of the containing operand
+
+  ``0,F:``
+    value of the other parts (F---all bits set)
+
+  The constraint matches if the specified part of a constant
+  has a value different from its other parts.
+
+``Q``
+  Memory reference without index register and with short displacement.
+
+``R``
+  Memory reference with index register and short displacement.
+
+``S``
+  Memory reference without index register but with long displacement.
+
+``T``
+  Memory reference with index register and long displacement.
+
+``U``
+  Pointer with short displacement.
+
+``W``
+  Pointer with long displacement.
+
+``Y``
+  Shift count operand.
+
+SPARC---:samp:`{config/sparc/sparc.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  Floating-point register on the SPARC-V8 architecture and
+  lower floating-point register on the SPARC-V9 architecture.
+
+``e``
+  Floating-point register.  It is equivalent to :samp:`f` on the
+  SPARC-V8 architecture and contains both lower and upper
+  floating-point registers on the SPARC-V9 architecture.
+
+``c``
+  Floating-point condition code register.
+
+``d``
+  Lower floating-point register.  It is only valid on the SPARC-V9
+  architecture when the Visual Instruction Set is available.
+
+``b``
+  Floating-point register.  It is only valid on the SPARC-V9 architecture
+  when the Visual Instruction Set is available.
+
+``h``
+  64-bit global or out register for the SPARC-V8+ architecture.
+
+``C``
+  The constant all-ones, for floating-point.
+
+``A``
+  Signed 5-bit constant
+
+``D``
+  A vector constant
+
+``I``
+  Signed 13-bit constant
+
+``J``
+  Zero
+
+``K``
+  32-bit constant with the low 12 bits clear (a constant that can be
+  loaded with the ``sethi`` instruction)
+
+``L``
+  A constant in the range supported by ``movcc`` instructions (11-bit
+  signed immediate)
+
+``M``
+  A constant in the range supported by ``movrcc`` instructions (10-bit
+  signed immediate)
+
+``N``
+  Same as :samp:`K`, except that it verifies that bits that are not in the
+  lower 32-bit range are all zero.  Must be used instead of :samp:`K` for
+  modes wider than ``SImode``
+
+``O``
+  The constant 4096
+
+``G``
+  Floating-point zero
+
+``H``
+  Signed 13-bit constant, sign-extended to 32 or 64 bits
+
+``P``
+  The constant -1
+
+``Q``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single sethi
+  instruction
+
+``R``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single mov
+  instruction
+
+``S``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a high/lo_sum
+  instruction sequence
+
+``T``
+  Memory address aligned to an 8-byte boundary
+
+``U``
+  Even register
+
+``W``
+  Memory address for :samp:`e` constraint registers
+
+``w``
+  Memory address with only a base register
+
+``Y``
+  Vector zero
+
+TI C6X family---:samp:`{config/c6x/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register file A (A0--A31).
+
+``b``
+  Register file B (B0--B31).
+
+``A``
+  Predicate registers in register file A (A0--A2 on C64X and
+  higher, A1 and A2 otherwise).
+
+``B``
+  Predicate registers in register file B (B0--B2).
+
+``C``
+  A call-used register in register file B (B0--B9, B16--B31).
+
+``Da``
+  Register file A, excluding predicate registers (A3--A31,
+  plus A0 if not C64X or higher).
+
+``Db``
+  Register file B, excluding predicate registers (B3--B31).
+
+``Iu4``
+  Integer constant in the range 0 ... 15.
+
+``Iu5``
+  Integer constant in the range 0 ... 31.
+
+``In5``
+  Integer constant in the range -31 ... 0.
+
+``Is5``
+  Integer constant in the range -16 ... 15.
+
+``I5x``
+  Integer constant that can be the operand of an ADDA or a SUBA insn.
+
+``IuB``
+  Integer constant in the range 0 ... 65535.
+
+``IsB``
+  Integer constant in the range -32768 ... 32767.
+
+``IsC``
+  Integer constant in the range -2^{20} ... 2^{20} - 1.
+
+``Jc``
+  Integer constant that is a valid mask for the clr instruction.
+
+``Js``
+  Integer constant that is a valid mask for the set instruction.
+
+``Q``
+  Memory location with A base register.
+
+``R``
+  Memory location with B base register.
+
+.. only:: gccint
+
+  ``S0``
+    On C64x+ targets, a GP-relative small data reference.
+
+  ``S1``
+    Any kind of ``SYMBOL_REF``, for use in a call address.
+
+  ``Si``
+    Any kind of immediate operand, unless it matches the S0 constraint.
+
+  ``T``
+    Memory location with B base register, but not using a long offset.
+
+  ``W``
+    A memory operand with an address that cannot be used in an unaligned access.
+
+``Z``
+  Register B14 (aka DP).
+
+Visium---:samp:`{config/visium/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``b``
+  EAM register ``mdb``
+
+``c``
+  EAM register ``mdc``
+
+``f``
+  Floating point register
+
+.. only:: gccint
+
+  ``k``
+    Register for sibcall optimization
+
+``l``
+  General register, but not ``r29``, ``r30`` and ``r31``
+
+``t``
+  Register ``r1``
+
+``u``
+  Register ``r2``
+
+``v``
+  Register ``r3``
+
+``G``
+  Floating-point constant 0.0
+
+``J``
+  Integer constant in the range 0 .. 65535 (16-bit immediate)
+
+``K``
+  Integer constant in the range 1 .. 31 (5-bit immediate)
+
+``L``
+  Integer constant in the range -65535 .. -1 (16-bit negative immediate)
+
+``M``
+  Integer constant -1
+
+``O``
+  Integer constant 0
+
+``P``
+  Integer constant 32
+
+x86 family---:samp:`{config/i386/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R``
+  Legacy register---the eight integer registers available on all
+  i386 processors (``a``, ``b``, ``c``, ``d``,
+  ``si``, ``di``, ``bp``, ``sp``).
+
+``q``
+  Any register accessible as ``rl``.  In 32-bit mode, ``a``,
+  ``b``, ``c``, and ``d`` ; in 64-bit mode, any integer register.
+
+``Q``
+  Any register accessible as ``rh`` : ``a``, ``b``,
+  ``c``, and ``d``.
+
+.. only:: gccint
+
+  ``l``
+    Any register that can be used as the index in a base+index memory
+    access: that is, any general register except the stack pointer.
+
+``a``
+  The ``a`` register.
+
+``b``
+  The ``b`` register.
+
+``c``
+  The ``c`` register.
+
+``d``
+  The ``d`` register.
+
+``S``
+  The ``si`` register.
+
+``D``
+  The ``di`` register.
+
+``A``
+  The ``a`` and ``d`` registers.  This class is used for instructions
+  that return double word results in the ``ax:dx`` register pair.  Single
+  word values will be allocated either in ``ax`` or ``dx``.
+  For example on i386 the following implements ``rdtsc`` :
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned long long tick;
+      __asm__ __volatile__("rdtsc":"=A"(tick));
+      return tick;
+    }
+
+  This is not correct on x86-64 as it would allocate tick in either ``ax``
+  or ``dx``.  You have to use the following variant instead:
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned int tickl, tickh;
+      __asm__ __volatile__("rdtsc":"=a"(tickl),"=d"(tickh));
+      return ((unsigned long long)tickh << 32)|tickl;
+    }
+
+``U``
+  The call-clobbered integer registers.
+
+``f``
+  Any 80387 floating-point (stack) register.
+
+``t``
+  Top of 80387 floating-point stack (``%st(0)``).
+
+``u``
+  Second from top of 80387 floating-point stack (``%st(1)``).
+
+.. only:: gccint
+
+  ``Yk``
+    Any mask register that can be used as a predicate, i.e. ``k1-k7``.
+
+  ``k``
+    Any mask register.
+
+``y``
+  Any MMX register.
+
+``x``
+  Any SSE register.
+
+``v``
+  Any EVEX encodable SSE register (``%xmm0-%xmm31``).
+
+.. only:: gccint
+
+  ``w``
+    Any bound register.
+
+``Yz``
+  First SSE register (``%xmm0``).
+
+.. only:: gccint
+
+  ``Yi``
+    Any SSE register, when SSE2 and inter-unit moves are enabled.
+
+  ``Yj``
+    Any SSE register, when SSE2 and inter-unit moves from vector registers are enabled.
+
+  ``Ym``
+    Any MMX register, when inter-unit moves are enabled.
+
+  ``Yn``
+    Any MMX register, when inter-unit moves from vector registers are enabled.
+
+  ``Yp``
+    Any integer register when ``TARGET_PARTIAL_REG_STALL`` is disabled.
+
+  ``Ya``
+    Any integer register when zero extensions with ``AND`` are disabled.
+
+  ``Yb``
+    Any register that can be used as the GOT base when calling
+
+    ``___tls_get_addr`` : that is, any general register except ``a``
+    and ``sp`` registers, for :option:`-fno-plt` if linker supports it.
+    Otherwise, ``b`` register.
+
+  ``Yf``
+    Any x87 register when 80387 floating-point arithmetic is enabled.
+
+  ``Yr``
+    Lower SSE register when avoiding REX prefix and all SSE registers otherwise.
+
+  ``Yv``
+    For AVX512VL, any EVEX-encodable SSE register (``%xmm0-%xmm31``),
+    otherwise any SSE register.
+
+  ``Yh``
+    Any EVEX-encodable SSE register, that has number factor of four.
+
+  ``Bf``
+    Flags register operand.
+
+  ``Bg``
+    GOT memory operand.
+
+  ``Bm``
+    Vector memory operand.
+
+  ``Bc``
+    Constant memory operand.
+
+``Bn``
+  Memory operand without REX prefix.
+
+``Bs``
+  Sibcall memory operand.
+
+``Bw``
+  Call memory operand.
+
+``Bz``
+  Constant call address operand.
+
+``BC``
+  SSE constant -1 operand.
+
+``I``
+  Integer constant in the range 0 ... 31, for 32-bit shifts.
+
+``J``
+  Integer constant in the range 0 ... 63, for 64-bit shifts.
+
+``K``
+  Signed 8-bit integer constant.
+
+``L``
+  ``0xFF`` or ``0xFFFF``, for andsi as a zero-extending move.
+
+``M``
+  0, 1, 2, or 3 (shifts for the ``lea`` instruction).
+
+``N``
+  Unsigned 8-bit integer constant (for ``in`` and ``out``
+  instructions).
+
+.. only:: gccint
+
+  ``O``
+    Integer constant in the range 0 ... 127, for 128-bit shifts.
+
+``G``
+  Standard 80387 floating point constant.
+
+``C``
+  SSE constant zero operand.
+
+``e``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in sign-extending x86-64
+  instructions).
+
+``We``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for sign-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wz``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for zero-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wd``
+  128-bit integer constant where both the high and low 64-bit word
+  satisfy the ``e`` constraint.
+
+``Z``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in zero-extending x86-64
+  instructions).
+
+``Tv``
+  VSIB address operand.
+
+``Ts``
+  Address operand without segment register.
+
+Xstormy16---:samp:`{config/stormy16/stormy16.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register r0.
+
+``b``
+  Register r1.
+
+``c``
+  Register r2.
+
+``d``
+  Register r8.
+
+``e``
+  Registers r0 through r7.
+
+``t``
+  Registers r0 and r1.
+
+``y``
+  The carry register.
+
+``z``
+  Registers r8 and r9.
+
+``I``
+  A constant between 0 and 3 inclusive.
+
+``J``
+  A constant that has exactly one bit set.
+
+``K``
+  A constant that has exactly one bit clear.
+
+``L``
+  A constant between 0 and 255 inclusive.
+
+``M``
+  A constant between -255 and 0 inclusive.
+
+``N``
+  A constant between -3 and 0 inclusive.
+
+``O``
+  A constant between 1 and 4 inclusive.
+
+``P``
+  A constant between -4 and -1 inclusive.
+
+``Q``
+  A memory reference that is a stack push.
+
+``R``
+  A memory reference that is a stack pop.
+
+``S``
+  A memory reference that refers to a constant address of known value.
+
+``T``
+  The register indicated by Rx (not implemented yet).
+
+``U``
+  A constant that is not between 2 and 15 inclusive.
+
+``Z``
+  The constant 0.
+
+Xtensa---:samp:`{config/xtensa/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General-purpose 32-bit register
+
+``b``
+  One-bit boolean register
+
+``A``
+  MAC16 40-bit accumulator register
+
+``I``
+  Signed 12-bit integer constant, for use in MOVI instructions
+
+``J``
+  Signed 8-bit integer constant, for use in ADDI instructions
+
+``K``
+  Integer constant valid for BccI instructions
+
+``L``
+  Unsigned constant valid for BccUI instructions
\ No newline at end of file
diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 00000000000..f5558030ca8
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,3 @@
+Sphinx>=5.3
+furo
+sphinx_copybutton
diff --git a/gcc/d/doc/conf.py b/gcc/d/doc/conf.py
new file mode 100644
index 00000000000..c33f28a2f7f
--- /dev/null
+++ b/gcc/d/doc/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'gdc'
+project = 'The GNU D Compiler'
+copyright = '2006-2022 Free Software Foundation, Inc.'
+authors = 'David Friedman, Iain Buclaw'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invoking-gdc', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/d/doc/copyright.rst b/gcc/d/doc/copyright.rst
new file mode 100644
index 00000000000..5afce611a7a
--- /dev/null
+++ b/gcc/d/doc/copyright.rst
@@ -0,0 +1,13 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is in the :ref:`gnu_fdl`.
\ No newline at end of file
diff --git a/gcc/d/doc/general-public-license-3.rst b/gcc/d/doc/general-public-license-3.rst
new file mode 100644
index 00000000000..becda773ca0
--- /dev/null
+++ b/gcc/d/doc/general-public-license-3.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gpl-3.0.rst
\ No newline at end of file
diff --git a/gcc/d/doc/gnu-free-documentation-license.rst b/gcc/d/doc/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/d/doc/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/d/doc/index.rst b/gcc/d/doc/index.rst
new file mode 100644
index 00000000000..700a4a8d885
--- /dev/null
+++ b/gcc/d/doc/index.rst
@@ -0,0 +1,22 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The GNU D Compiler
+==================
+
+This manual describes how to use :command:`gdc`, the GNU compiler for
+the D programming language.  This manual is specifically about
+:command:`gdc`.  For more information about the D programming
+language in general, including language specifications and standard
+package documentation, see https://dlang.org/.
+
+.. toctree::
+
+  copyright
+  invoking-gdc
+  general-public-license-3
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/d/doc/indices-and-tables.rst b/gcc/d/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/d/doc/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc.rst b/gcc/d/doc/invoking-gdc.rst
new file mode 100644
index 00000000000..be477b82f07
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc.rst
@@ -0,0 +1,48 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _invoking-gdc:
+
+Invoking gdc
+------------
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  gdc [ :option:`-c` | :option:`-S` ] [ :option:`-g` ] [ :option:`-pg` ]
+      [ :option:`-O`:samp:`{level}` ] [ :option:`-W`:samp:`{warn}`...]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-L`:samp:`{dir}`...]
+      [ :option:`-f`:samp:`{option}`...] [ :option:`-m`:samp:`{machine-option}`...]
+      [ :option:`-o` :samp:`{outfile}` ] [@ :samp:`{file}` ] :samp:`{infile}`...
+
+  Only the most useful options are listed here; see below for the
+  remainder.
+
+Description
+^^^^^^^^^^^
+
+The :command:`gdc` command is the GNU compiler for the D language and
+supports many of the same options as :command:`gcc`.  See :ref:`gcc:option-summary`.
+This manual only documents the options specific to :command:`gdc`.
+
+Options
+^^^^^^^
+
+.. toctree::
+  :maxdepth: 2
+
+  invoking-gdc/input-and-output-files
+  invoking-gdc/runtime-options
+  invoking-gdc/options-for-directory-search
+  invoking-gdc/code-generation
+  invoking-gdc/warnings
+  invoking-gdc/options-for-linking
+  invoking-gdc/developer-options
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/code-generation.rst b/gcc/d/doc/invoking-gdc/code-generation.rst
new file mode 100644
index 00000000000..178b6f98fe2
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/code-generation.rst
@@ -0,0 +1,170 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, code generation
+
+.. _code-generation:
+
+Code Generation
+***************
+
+In addition to the many :command:`gcc` options controlling code generation,
+:command:`gdc` has several options specific to itself.
+
+.. option:: -H
+
+  .. index:: -H
+
+  Generates D interface files for all modules being compiled.  The compiler
+  determines the output file based on the name of the input file, removes
+  any directory components and suffix, and applies the :samp:`.di` suffix.
+
+.. option:: -Hd dir
+
+  .. index:: -Hd
+
+  Same as :option:`-H`, but writes interface files to directory :samp:`{dir}`.
+  This option can be used with :option:`-Hf file` to independently set the
+  output file and directory path.
+
+.. option:: -Hf file
+
+  .. index:: -Hf
+
+  Same as :option:`-H` but writes interface files to :samp:`{file}`.  This option can
+  be used with :option:`-Hd dir` to independently set the output file and
+  directory path.
+
+.. option:: -M
+
+  .. index:: -M
+
+  Output the module dependencies of all source files being compiled in a
+  format suitable for :command:`make`.  The compiler outputs one
+  :command:`make` rule containing the object file name for that source file,
+  a colon, and the names of all imported files.
+
+.. option:: -MM
+
+  .. index:: -MM
+
+  Like :option:`-M` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -MF file
+
+  .. index:: -MF
+
+  When used with :option:`-M` or :option:`-MM`, specifies a :samp:`{file}` to write
+  the dependencies to.  When used with the driver options :option:`-MD` or
+  :option:`-MMD`, :option:`-MF` overrides the default dependency output file.
+
+.. option:: -MG
+
+  .. index:: -MG
+
+  This option is for compatibility with :command:`gcc`, and is ignored by the
+  compiler.
+
+.. option:: -MP
+
+  .. index:: -MP
+
+  Outputs a phony target for each dependency other than the modules being
+  compiled, causing each to depend on nothing.
+
+.. option:: -MT target
+
+  .. index:: -MT
+
+  Change the :samp:`{target}` of the rule emitted by dependency generation
+  to be exactly the string you specify.  If you want multiple targets,
+  you can specify them as a single argument to :option:`-MT`, or use
+  multiple :option:`-MT` options.
+
+.. option:: -MQ target
+
+  .. index:: -MQ
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  :command:`make`.
+
+.. option:: -MD
+
+  .. index:: -MD
+
+  This option is equivalent to :option:`-M -MF file`.  The driver
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.deps` suffix.
+
+.. option:: -MMD
+
+  .. index:: -MMD
+
+  Like :option:`-MD` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -X
+
+  .. index:: -X
+
+  Output information describing the contents of all source files being
+  compiled in JSON format to a file.  The driver determines :samp:`{file}` by
+  removing any directory components and suffix from the input file, and then
+  adding a :samp:`.json` suffix.
+
+.. option:: -Xf file
+
+  .. index:: -Xf
+
+  Same as :option:`-X`, but writes all JSON contents to the specified
+  :samp:`{file}`.
+
+.. option:: -fdoc
+
+  .. index:: -fdoc
+
+  Generates ``Ddoc`` documentation and writes it to a file.  The compiler
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.html` suffix.
+
+.. option:: -fdoc-dir=dir
+
+  .. index:: -fdoc-dir
+
+  Same as :option:`-fdoc`, but writes documentation to directory :samp:`{dir}`.
+  This option can be used with :option:`-fdoc-file=file` to
+  independently set the output file and directory path.
+
+.. option:: -fdoc-file=file
+
+  .. index:: -fdoc-file
+
+  Same as :option:`-fdoc`, but writes documentation to :samp:`{file}`.  This
+  option can be used with :option:`-fdoc-dir=dir` to independently
+  set the output file and directory path.
+
+.. option:: -fdoc-inc=file
+
+  .. index:: -fdoc-inc
+
+  Specify :samp:`{file}` as a :samp:`{Ddoc}` macro file to be read.  Multiple
+  :option:`-fdoc-inc` options can be used, and files are read and processed
+  in the same order.
+
+.. option::  -fdump-c++-spec={file}
+
+  For D source files, generate corresponding C++ declarations in :samp:`{file}`.
+
+.. option:: -fdump-c++-spec-verbose
+
+  In conjunction with :option:`-fdump-c++-spec=` above, add comments for ignored
+  declarations in the generated C++ header.
+
+.. option:: -fsave-mixins={file}
+
+  Generates code expanded from D ``mixin`` statements and writes the
+  processed sources to :samp:`{file}`.  This is useful to debug errors in compilation
+  and provides source for debuggers to show when requested.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/developer-options.rst b/gcc/d/doc/invoking-gdc/developer-options.rst
new file mode 100644
index 00000000000..564ed36d6c0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/developer-options.rst
@@ -0,0 +1,31 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: developer options, debug dump options, dump options
+
+.. _developer-options:
+
+Developer Options
+*****************
+
+This section describes command-line options that are primarily of
+interest to developers or language tooling.
+
+.. option:: -fdump-d-original
+
+  .. index:: -fdump-d-original
+
+  Output the internal front-end AST after the ``semantic3`` stage.
+  This option is only useful for debugging the GNU D compiler itself.
+
+.. option:: -v
+
+  .. index:: -v
+
+  Dump information about the compiler language processing stages as the source
+  program is being compiled.  This includes listing all modules that are
+  processed through the ``parse``, ``semantic``, ``semantic2``, and
+  ``semantic3`` stages; all ``import`` modules and their file paths;
+  and all ``function`` bodies that are being compiled.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/input-and-output-files.rst b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
new file mode 100644
index 00000000000..a4bce6b9aba
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
@@ -0,0 +1,45 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: suffixes for D source, D source file suffixes
+
+.. _input-and-output-files:
+
+Input and Output files
+**********************
+
+For any given input file, the file name suffix determines what kind of
+compilation is done.  The following kinds of input file names are supported:
+
+:samp:`{file}.d`
+  D source files.
+
+:samp:`{file}.dd`
+  Ddoc source files.
+
+:samp:`{file}.di`
+  D interface files.
+
+You can specify more than one input file on the :command:`gdc` command line,
+each being compiled separately in the compilation process.  If you specify a
+``-o file`` option, all the input files are compiled together,
+producing a single output file, named :samp:`{file}`.  This is allowed even
+when using ``-S`` or ``-c``.
+
+.. index:: D interface files.
+
+A D interface file contains only what an import of the module needs,
+rather than the whole implementation of that module.  They can be created
+by :command:`gdc` from a D source file by using the ``-H`` option.
+When the compiler resolves an import declaration, it searches for matching
+:samp:`.di` files first, then for :samp:`.d`.
+
+.. index:: Ddoc source files.
+
+A Ddoc source file contains code in the D macro processor language.  It is
+primarily designed for use in producing user documentation from embedded
+comments, with a slight affinity towards HTML generation.  If a :samp:`.d`
+source file starts with the string ``Ddoc`` then it is treated as general
+purpose documentation, not as a D source file.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-directory-search.rst b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
new file mode 100644
index 00000000000..934b22df5b0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
@@ -0,0 +1,92 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: directory options, options, directory search, search path
+
+.. _directory-options:
+
+Options for Directory Search
+****************************
+
+These options specify directories to search for files, libraries, and
+other parts of the compiler:
+
+.. option:: -Idir
+
+  .. index:: -I
+
+  Specify a directory to use when searching for imported modules at
+  compile time.  Multiple :option:`-I` options can be used, and the
+  paths are searched in the same order.
+
+.. option:: -Jdir
+
+  .. index:: -J
+
+  Specify a directory to use when searching for files in string imports
+  at compile time.  This switch is required in order to use
+  ``import(file)`` expressions.  Multiple :option:`-J` options can be
+  used, and the paths are searched in the same order.
+
+.. option:: -Ldir
+
+  .. index:: -L
+
+  When linking, specify a library search directory, as with :command:`gcc`.
+
+.. option:: -Bdir
+
+  .. index:: -B
+
+  This option specifies where to find the executables, libraries,
+  source files, and data files of the compiler itself, as with :command:`gcc`.
+
+.. option:: -fmodule-file=module=spec
+
+  .. index:: -fmodule-file
+
+  This option manipulates file paths of imported modules, such that if an
+  imported module matches all or the leftmost part of :samp:`{module}`, the file
+  path in :samp:`{spec}` is used as the location to search for D sources.
+  This is used when the source file path and names are not the same as the
+  package and module hierarchy.  Consider the following examples:
+
+  .. code-block:: c++
+
+    gdc test.d -fmodule-file=A.B=foo.d -fmodule-file=C=bar
+
+  This will tell the compiler to search in all import paths for the source
+  file :samp:`{foo.d}` when importing :samp:`{A.B}`, and the directory :samp:`{bar/}`
+  when importing :samp:`{C}`, as annotated in the following D code:
+
+  .. code-block:: c++
+
+    module test;
+    import A.B;     // Matches A.B, searches for foo.d
+    import C.D.E;   // Matches C, searches for bar/D/E.d
+    import A.B.C;   // No match, searches for A/B/C.d
+
+.. option:: -imultilib dir
+
+  .. index:: -imultilib
+
+  Use :samp:`{dir}` as a subdirectory of the gcc directory containing
+  target-specific D sources and interfaces.
+
+.. option:: -iprefix prefix
+
+  .. index:: -iprefix
+
+  Specify :samp:`{prefix}` as the prefix for the gcc directory containing
+  target-specific D sources and interfaces.  If the :samp:`{prefix}` represents
+  a directory, you should include the final ``'/'``.
+
+.. option:: -nostdinc
+
+  .. index:: -nostdinc
+
+  Do not search the standard system directories for D source and interface
+  files.  Only the directories that have been specified with :option:`-I` options
+  (and the directory of the current file, if appropriate) are searched.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-linking.rst b/gcc/d/doc/invoking-gdc/options-for-linking.rst
new file mode 100644
index 00000000000..dc64fcd206a
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-linking.rst
@@ -0,0 +1,59 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, linking, linking, static
+
+.. _linking:
+
+Options for Linking
+*******************
+
+These options come into play when the compiler links object files into an
+executable output file.  They are meaningless if the compiler is not doing
+a link step.
+
+.. option:: -defaultlib=libname
+
+  .. index:: -defaultlib=
+
+  Specify the library to use instead of libphobos when linking.  Options
+  specifying the linkage of libphobos, such as :option:`-static-libphobos`
+  or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -debuglib=libname
+
+  .. index:: -debuglib=
+
+  Specify the debug library to use instead of libphobos when linking.
+  This option has no effect unless the :option:`-g` option was also given
+  on the command line.  Options specifying the linkage of libphobos, such
+  as :option:`-static-libphobos` or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -nophoboslib
+
+  .. index:: -nophoboslib
+
+  Do not use the Phobos or D runtime library when linking.  Options specifying
+  the linkage of libphobos, such as :option:`-static-libphobos` or
+  :option:`-shared-libphobos`, are ignored.  The standard system libraries are
+  used normally, unless :option:`-nostdlib` or :option:`-nodefaultlibs` is used.
+
+.. option:: -shared-libphobos
+
+  .. index:: -shared-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the shared
+  version.  If no shared version was built when the compiler was configured,
+  this option has no effect.
+
+.. option:: -static-libphobos
+
+  .. index:: -static-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the static
+  version.  If no static version was built when the compiler was configured,
+  this option has no effect.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/runtime-options.rst b/gcc/d/doc/invoking-gdc/runtime-options.rst
new file mode 100644
index 00000000000..fda87c2b96e
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/runtime-options.rst
@@ -0,0 +1,314 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, runtime
+
+.. _runtime-options:
+
+Runtime Options
+***************
+
+These options affect the runtime behavior of programs compiled with
+:command:`gdc`.
+
+.. option:: -fall-instantiations
+
+  .. index:: -fall-instantiations, -fno-all-instantiations
+
+  Generate code for all template instantiations.  The default template emission
+  strategy is to not generate code for declarations that were either
+  instantiated speculatively, such as from ``__traits(compiles, ...)``, or
+  that come from an imported module not being compiled.
+
+.. option:: -fno-assert
+
+  .. index:: -fassert, -fno-assert
+
+  Turn off code generation for ``assert`` contracts.
+
+.. option:: -fno-bounds-check
+
+  .. index:: -fbounds-check, -fno-bounds-check
+
+  Turns off array bounds checking for all functions, which can improve
+  performance for code that uses arrays extensively.  Note that this
+  can result in unpredictable behavior if the code in question actually
+  does violate array bounds constraints.  It is safe to use this option
+  if you are sure that your code never throws a ``RangeError``.
+
+.. option:: -fbounds-check=value
+
+  .. index:: -fbounds-check=
+
+  An alternative to :option:`-fbounds-check` that allows more control
+  as to where bounds checking is turned on or off.  The following values
+  are supported:
+
+  :samp:`on`
+    Turns on array bounds checking for all functions.
+
+  :samp:`safeonly`
+    Turns on array bounds checking only for ``@safe`` functions.
+
+  :samp:`off`
+    Turns off array bounds checking completely.
+
+.. option:: -fno-builtin
+
+  .. index:: -fbuiltin, -fno-builtin
+
+  Don't recognize built-in functions unless they begin with the prefix
+  :samp:`__builtin_`.  By default, the compiler will recognize when a
+  function in the ``core.stdc`` package is a built-in function.
+
+.. option:: -fcheckaction
+
+  This option controls what code is generated on an assertion, bounds check, or
+  final switch failure.  The following values are supported:
+
+  :samp:`context`
+    Throw an ``AssertError`` with extra context information.
+
+  :samp:`halt`
+    Halt the program execution.
+
+  :samp:`throw`
+    Throw an ``AssertError`` (the default).
+
+.. option:: -fdebug=value
+
+  .. index:: -fno-debug
+
+  Turn on compilation of conditional ``debug`` code into the program.
+  The :option:`-fdebug` option itself sets the debug level to ``1``,
+  while :option:`-fdebug=` enables ``debug`` code that are identified
+  by any of the following values:
+
+  :samp:`level`
+    Sets the debug level to :samp:`{level}`, any ``debug`` code <= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of any ``debug`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-druntime
+
+  .. index:: -fdruntime, -fno-druntime
+
+  Implements https://dlang.org/spec/betterc.html.  Assumes that
+  compilation targets an environment without a D runtime library.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -nophoboslib -fno-exceptions -fno-moduleinfo -fno-rtti
+
+.. option:: -fextern-std=standard
+
+  Sets the C++ name mangling compatibility to the version identified by
+  :samp:`{standard}`.  The following values are supported:
+
+  :samp:`c++98`, :samp:`c++03`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``199711``.
+
+  :samp:`c++11`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201103``.
+
+  :samp:`c++14`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201402``.
+
+  :samp:`c++17`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201703``.
+    This is the default.
+
+  :samp:`c++20`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``202002``.
+
+.. option:: -fno-invariants
+
+  .. index:: -finvariants, -fno-invariants
+
+  Turns off code generation for class ``invariant`` contracts.
+
+.. option:: -fmain
+
+  Generates a default ``main()`` function when compiling.  This is useful when
+  unittesting a library, as it enables running the unittests in a library without
+  having to manually define an entry-point function.  This option does nothing
+  when ``main`` is already defined in user code.
+
+.. option:: -fno-moduleinfo
+
+  Turns off generation of the ``ModuleInfo`` and related functions
+  that would become unreferenced without it, which may allow linking
+  to programs not written in D.  Functions that are not be generated
+  include module constructors and destructors (``static this`` and
+  ``static ~this``), ``unittest`` code, and ``DSO`` registry
+  functions for dynamically linked code.
+
+.. option:: -fonly=filename
+
+  .. index:: -fonly
+
+  Tells the compiler to parse and run semantic analysis on all modules
+  on the command line, but only generate code for the module specified
+  by :samp:`{filename}`.
+
+.. option:: -fno-postconditions
+
+  .. index:: -fpostconditions, -fno-postconditions
+
+  Turns off code generation for postcondition ``out`` contracts.
+
+.. option:: -fno-preconditions
+
+  .. index:: -fpreconditions, -fno-preconditions
+
+  Turns off code generation for precondition ``in`` contracts.
+
+.. option:: -fpreview=id
+
+  .. index:: -fpreview
+
+  Turns on an upcoming D language change identified by :samp:`{id}`.  The following
+  values are supported:
+
+  :samp:`all`
+    Turns on all upcoming D language features.
+
+  :samp:`dip1000`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1000.md
+    (Scoped pointers).
+
+  :samp:`dip1008`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1008.md
+    (Allow exceptions in ``@nogc`` code).
+
+  :samp:`dip1021`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/accepted/DIP1021.md
+    (Mutable function arguments).
+
+  :samp:`dip25`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns on generation for destructing fields of partially constructed objects.
+
+  :samp:`fieldwise`
+    Turns on generation of struct equality to use field-wise comparisons.
+
+  :samp:`fixaliasthis`
+    Implements new lookup rules that check the current scope for ``alias this``
+    before searching in upper scopes.
+
+  :samp:`fiximmutableconv`
+    Disallows unsound immutable conversions that were formerly incorrectly
+    permitted.
+
+  :samp:`in`
+    Implements ``in`` parameters to mean ``scope const [ref]`` and accepts
+    rvalues.
+
+  :samp:`inclusiveincontracts`
+    Implements ``in`` contracts of overridden methods to be a superset of parent
+    contract.
+
+  :samp:`intpromote`
+    Implements C-style integral promotion for unary ``+``, ``-`` and ``~``
+    expressions.
+
+  :samp:`nosharedaccess`
+    Turns off and disallows all access to shared memory objects.
+
+  :samp:`rvaluerefparam`
+    Implements rvalue arguments to ``ref`` parameters.
+
+  :samp:`systemvariables`
+    Disables access to variables marked ``@system`` from ``@safe`` code.
+
+.. option:: -frelease
+
+  .. index:: -fno-release
+
+  Turns on compiling in release mode, which means not emitting runtime
+  checks for contracts and asserts.  Array bounds checking is not done
+  for ``@system`` and ``@trusted`` functions, and assertion
+  failures are undefined behavior.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -fno-assert -fbounds-check=safe -fno-invariants \
+        -fno-postconditions -fno-preconditions -fno-switch-errors
+
+.. option:: -frevert=
+
+  .. index:: -frevert
+
+  Turns off a D language feature identified by :samp:`{id}`.  The following values
+  are supported:
+
+  :samp:`all`
+    Turns off all revertable D language features.
+
+  :samp:`dip25`
+    Reverts https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns off generation for destructing fields of partially constructed objects.
+
+  :samp:`markdown`
+    Turns off Markdown replacements in Ddoc comments.
+
+.. option:: -fno-rtti
+
+  .. index:: -frtti, -fno-rtti
+
+  Turns off generation of run-time type information for all user defined types.
+  Any code that uses features of the language that require access to this
+  information will result in an error.
+
+.. option:: -fno-switch-errors
+
+  .. index:: -fswitch-errors, -fno-switch-errors
+
+  This option controls what code is generated when no case is matched
+  in a ``final switch`` statement.  The default run time behavior
+  is to throw a ``SwitchError``.  Turning off :option:`-fswitch-errors`
+  means that instead the execution of the program is immediately halted.
+
+.. option:: -funittest
+
+  .. index:: -funittest, -fno-unittest
+
+  Turns on compilation of ``unittest`` code, and turns on the
+  ``version(unittest)`` identifier.  This implies :option:`-fassert`.
+
+.. option:: -fversion=value
+
+  .. index:: -fversion
+
+  Turns on compilation of conditional ``version`` code into the program
+  identified by any of the following values:
+
+  :samp:`level`
+    Sets the version level to :samp:`{level}`, any ``version`` code >= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of ``version`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-weak-templates
+
+  .. index:: -fweak-templates, -fno-weak-templates
+
+  Turns off emission of declarations that can be defined in multiple objects as
+  weak symbols.  The default is to emit all public symbols as weak, unless the
+  target lacks support for weak symbols.  Disabling this option means that common
+  symbols are instead put in COMDAT or become private.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/warnings.rst b/gcc/d/doc/invoking-gdc/warnings.rst
new file mode 100644
index 00000000000..c9ed52e7630
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/warnings.rst
@@ -0,0 +1,148 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options to control warnings, warning messages, messages, warning, suppressing warnings
+
+.. _warnings:
+
+Warnings
+********
+
+Warnings are diagnostic messages that report constructions that
+are not inherently erroneous but that are risky or suggest there
+is likely to be a bug in the program.  Unless :option:`-Werror` is
+specified, they do not prevent compilation of the program.
+
+.. option:: -Wall
+
+  .. index:: -Wall, -Wno-all
+
+  Turns on all warnings messages.  Warnings are not a defined part of
+  the D language, and all constructs for which this may generate a
+  warning message are valid code.
+
+.. option:: -Walloca
+
+  .. index:: -Walloca
+
+  This option warns on all uses of "alloca" in the source.
+
+.. option:: -Walloca-larger-than=n
+
+  .. index:: -Walloca-larger-than, -Wno-alloca-larger-than
+
+  Warn on unbounded uses of alloca, and on bounded uses of alloca
+  whose bound can be larger than :samp:`{n}` bytes.
+  :option:`-Wno-alloca-larger-than` disables
+  :option:`-Walloca-larger-than` warning and is equivalent to
+  :option:`-Walloca-larger-than=SIZE_MAX` or larger.
+
+.. option:: -Wcast-result
+
+  .. index:: -Wcast-result, -Wno-cast-result
+
+  Warn about casts that will produce a null or zero result.  Currently
+  this is only done for casting between an imaginary and non-imaginary
+  data type, or casting between a D and C++ class.
+
+.. option:: -Wno-deprecated
+
+  .. index:: -Wdeprecated, -Wno-deprecated
+
+  Do not warn about usage of deprecated features and symbols with
+  ``deprecated`` attributes.
+
+.. option:: -Werror
+
+  .. index:: -Werror, -Wno-error
+
+  Turns all warnings into errors.
+
+.. option:: -Wspeculative
+
+  .. index:: -Wspeculative, -Wno-speculative
+
+  List all error messages from speculative compiles, such as
+  ``__traits(compiles, ...)``.  This option does not report
+  messages as warnings, and these messages therefore never become
+  errors when the :option:`-Werror` option is also used.
+
+.. option:: -Wtemplates
+
+  .. index:: -Wtemplates, -Wno-templates
+
+  Warn when a template instantiation is encountered.  Some coding
+  rules disallow templates, and this may be used to enforce that rule.
+
+.. option:: -Wunknown-pragmas
+
+  .. index:: -Wunknown-pragmas, -Wno-unknown-pragmas
+
+  Warn when a ``pragma()`` is encountered that is not understood by
+  :command:`gdc`.  This differs from :option:`-fignore-unknown-pragmas`
+  where a pragma that is part of the D language, but not implemented by
+  the compiler, won't get reported.
+
+.. option:: -Wno-varargs
+
+  .. index:: Wvarargs, Wno-varargs
+
+  Do not warn upon questionable usage of the macros used to handle variable
+  arguments like ``va_start``.
+
+.. option:: -fignore-unknown-pragmas
+
+  .. index:: -fignore-unknown-pragmas, -fno-ignore-unknown-pragmas
+
+  Turns off errors for unsupported pragmas.
+
+.. option:: -fmax-errors=n
+
+  .. index:: -fmax-errors
+
+  Limits the maximum number of error messages to :samp:`{n}`, at which point
+  :command:`gdc` bails out rather than attempting to continue processing the
+  source code.  If :samp:`{n}` is 0 (the default), there is no limit on the
+  number of error messages produced.
+
+.. option:: -fsyntax-only
+
+  .. index:: -fsyntax-only, -fno-syntax-only
+
+  Check the code for syntax errors, but do not actually compile it.  This
+  can be used in conjunction with :option:`-fdoc` or :option:`-H` to generate
+  files for each module present on the command-line, but no other output
+  file.
+
+.. option:: -ftransition=id
+
+  .. index:: -ftransition
+
+  Report additional information about D language changes identified by
+  :samp:`{id}`.  The following values are supported:
+
+  :samp:`all`
+    List information on all D language transitions.
+
+  :samp:`complex`
+    List all usages of complex or imaginary types.
+
+  :samp:`field`
+    List all non-mutable fields which occupy an object instance.
+
+  :samp:`in`
+    List all usages of ``in`` on parameter.
+
+  :samp:`nogc`
+    List all hidden GC allocations.
+
+  :samp:`templates`
+    List statistics on template instantiations.
+
+  :samp:`tls`
+    List all variables going into thread local storage.
+
+  :samp:`vmarkdown`
+    List instances of Markdown replacements in Ddoc.
\ No newline at end of file
diff --git a/gcc/doc/cpp/character-sets.rst b/gcc/doc/cpp/character-sets.rst
new file mode 100644
index 00000000000..f4b6e05515c
--- /dev/null
+++ b/gcc/doc/cpp/character-sets.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _character-sets:
+
+Character sets
+**************
+
+Source code character set processing in C and related languages is
+rather complicated.  The C standard discusses two character sets, but
+there are really at least four.
+
+The files input to CPP might be in any character set at all.  CPP's
+very first action, before it even looks for line boundaries, is to
+convert the file into the character set it uses for internal
+processing.  That set is what the C standard calls the :dfn:`source`
+character set.  It must be isomorphic with ISO 10646, also known as
+Unicode.  CPP uses the UTF-8 encoding of Unicode.
+
+The character sets of the input files are specified using the
+:option:`-finput-charset=` option.
+
+All preprocessing work (the subject of the rest of this manual) is
+carried out in the source character set.  If you request textual
+output from the preprocessor with the :option:`-E` option, it will be
+in UTF-8.
+
+After preprocessing is complete, string and character constants are
+converted again, into the :dfn:`execution` character set.  This
+character set is under control of the user; the default is UTF-8,
+matching the source character set.  Wide string and character
+constants have their own character set, which is not called out
+specifically in the standard.  Again, it is under control of the user.
+The default is UTF-16 or UTF-32, whichever fits in the target's
+``wchar_t`` type, in the target machine's byte
+order [#f1]_.
+
+Octal and hexadecimal escape sequences do not undergo
+conversion; ``'\x12'`` has the value 0x12 regardless of the currently
+selected execution character set.  All other escapes are replaced by
+the character in the source character set that they represent, then
+converted to the execution character set, just like unescaped
+characters.
+
+In identifiers, characters outside the ASCII range can be specified
+with the :samp:`\\u` and :samp:`\\U` escapes or used directly in the input
+encoding.  If strict ISO C90 conformance is specified with an option
+such as :option:`-std=c90`, or :option:`-fno-extended-identifiers` is
+used, then those constructs are not permitted in identifiers.
+
+.. [#f1] UTF-16 does not meet the requirements of the C
+  standard for a wide character set, but the choice of 16-bit
+  ``wchar_t`` is enshrined in some system ABIs so we cannot fix
+  this.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-syntax.rst b/gcc/doc/cpp/conditional-syntax.rst
new file mode 100644
index 00000000000..1dec2ac6f4b
--- /dev/null
+++ b/gcc/doc/cpp/conditional-syntax.rst
@@ -0,0 +1,411 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #if
+
+.. _conditional-syntax:
+
+Conditional Syntax
+******************
+
+A conditional in the C preprocessor begins with a :dfn:`conditional
+directive`: :samp:`#if`, :samp:`#ifdef` or :samp:`#ifndef`.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: #ifdef, #endif
+
+.. _ifdef:
+
+Ifdef
+^^^^^
+
+The simplest sort of conditional is
+
+.. code-block:: c++
+
+  #ifdef MACRO
+
+  controlled text
+
+  #endif /* MACRO */
+
+.. index:: conditional group
+
+This block is called a :dfn:`conditional group`.  :samp:`{controlled text}`
+will be included in the output of the preprocessor if and only if
+:samp:`{MACRO}` is defined.  We say that the conditional :dfn:`succeeds` if
+:samp:`{MACRO}` is defined, :dfn:`fails` if it is not.
+
+The :samp:`{controlled text}` inside of a conditional can include
+preprocessing directives.  They are executed only if the conditional
+succeeds.  You can nest conditional groups inside other conditional
+groups, but they must be completely nested.  In other words,
+:samp:`#endif` always matches the nearest :samp:`#ifdef` (or
+:samp:`#ifndef`, or :samp:`#if`).  Also, you cannot start a conditional
+group in one file and end it in another.
+
+Even if a conditional fails, the :samp:`{controlled text}` inside it is
+still run through initial transformations and tokenization.  Therefore,
+it must all be lexically valid C.  Normally the only way this matters is
+that all comments and string literals inside a failing conditional group
+must still be properly ended.
+
+The comment following the :samp:`#endif` is not required, but it is a
+good practice if there is a lot of :samp:`{controlled text}`, because it
+helps people match the :samp:`#endif` to the corresponding :samp:`#ifdef`.
+Older programs sometimes put :samp:`{MACRO}` directly after the
+:samp:`#endif` without enclosing it in a comment.  This is invalid code
+according to the C standard.  CPP accepts it with a warning.  It
+never affects which :samp:`#ifndef` the :samp:`#endif` matches.
+
+.. index:: #ifndef
+
+Sometimes you wish to use some code if a macro is *not* defined.
+You can do this by writing :samp:`#ifndef` instead of :samp:`#ifdef`.
+One common use of :samp:`#ifndef` is to include code only the first
+time a header file is included.  See :ref:`once-only-headers`.
+
+Macro definitions can vary between compilations for several reasons.
+Here are some samples.
+
+* Some macros are predefined on each kind of machine
+  (see :ref:`system-specific-predefined-macros`).  This allows you to provide
+  code specially tuned for a particular machine.
+
+* System header files define more macros, associated with the features
+  they implement.  You can test these macros with conditionals to avoid
+  using a system feature on a machine where it is not implemented.
+
+* Macros can be defined or undefined with the :option:`-D` and :option:`-U`
+  command-line options when you compile the program.  You can arrange to
+  compile the same source file into two different programs by choosing a
+  macro name to specify which program you want, writing conditionals to
+  test whether or how this macro is defined, and then controlling the
+  state of the macro with command-line options, perhaps set in the
+  Makefile.  See :ref:`invocation`.
+
+* Your program might have a special header file (often called
+  :samp:`config.h`) that is adjusted when the program is compiled.  It can
+  define or not define macros depending on the features of the system and
+  the desired capabilities of the program.  The adjustment can be
+  automated by a tool such as :command:`autoconf`, or done by hand.
+
+.. _if:
+
+If
+^^
+
+The :samp:`#if` directive allows you to test the value of an arithmetic
+expression, rather than the mere existence of one macro.  Its syntax is
+
+.. code-block:: c++
+
+  #if expression
+
+  controlled text
+
+  #endif /* expression */
+
+:samp:`{expression}` is a C expression of integer type, subject to stringent
+restrictions.  It may contain
+
+* Integer constants.
+
+* Character constants, which are interpreted as they would be in normal
+  code.
+
+* Arithmetic operators for addition, subtraction, multiplication,
+  division, bitwise operations, shifts, comparisons, and logical
+  operations (``&&`` and ``||``).  The latter two obey the usual
+  short-circuiting rules of standard C.
+
+* Macros.  All macros in the expression are expanded before actual
+  computation of the expression's value begins.
+
+* Uses of the ``defined`` operator, which lets you check whether macros
+  are defined in the middle of an :samp:`#if`.
+
+* Identifiers that are not macros, which are all considered to be the
+  number zero.  This allows you to write ``#if MACRO`` instead of
+  ``#ifdef MACRO``, if you know that MACRO, when defined, will
+  always have a nonzero value.  Function-like macros used without their
+  function call parentheses are also treated as zero.
+
+  In some contexts this shortcut is undesirable.  The :option:`-Wundef`
+  option causes GCC to warn whenever it encounters an identifier which is
+  not a macro in an :samp:`#if`.
+
+The preprocessor does not know anything about types in the language.
+Therefore, ``sizeof`` operators are not recognized in :samp:`#if`, and
+neither are ``enum`` constants.  They will be taken as identifiers
+which are not macros, and replaced by zero.  In the case of
+``sizeof``, this is likely to cause the expression to be invalid.
+
+The preprocessor calculates the value of :samp:`{expression}`.  It carries
+out all calculations in the widest integer type known to the compiler;
+on most machines supported by GCC this is 64 bits.  This is not the same
+rule as the compiler uses to calculate the value of a constant
+expression, and may give different results in some cases.  If the value
+comes out to be nonzero, the :samp:`#if` succeeds and the :samp:`{controlled
+text}` is included; otherwise it is skipped.
+
+.. index:: defined
+
+.. _defined:
+
+Defined
+^^^^^^^
+
+The special operator ``defined`` is used in :samp:`#if` and
+:samp:`#elif` expressions to test whether a certain name is defined as a
+macro.  ``defined name`` and ``defined (name)`` are
+both expressions whose value is 1 if :samp:`{name}` is defined as a macro at
+the current point in the program, and 0 otherwise.  Thus,  ``#if
+defined MACRO`` is precisely equivalent to ``#ifdef MACRO``.
+
+``defined`` is useful when you wish to test more than one macro for
+existence at once.  For example,
+
+.. code-block:: c++
+
+  #if defined (__vax__) || defined (__ns16000__)
+
+would succeed if either of the names ``__vax__`` or
+``__ns16000__`` is defined as a macro.
+
+Conditionals written like this:
+
+.. code-block:: c++
+
+  #if defined BUFSIZE && BUFSIZE >= 1024
+
+can generally be simplified to just ``#if BUFSIZE >= 1024``,
+since if ``BUFSIZE`` is not defined, it will be interpreted as having
+the value zero.
+
+If the ``defined`` operator appears as a result of a macro expansion,
+the C standard says the behavior is undefined.  GNU cpp treats it as a
+genuine ``defined`` operator and evaluates it normally.  It will warn
+wherever your code uses this feature if you use the command-line option
+:option:`-Wpedantic`, since other compilers may handle it differently.  The
+warning is also enabled by :option:`-Wextra`, and can also be enabled
+individually with :option:`-Wexpansion-to-defined`.
+
+.. index:: #else
+
+.. _else:
+
+Else
+^^^^
+
+The :samp:`#else` directive can be added to a conditional to provide
+alternative text to be used if the condition fails.  This is what it
+looks like:
+
+.. code-block:: c++
+
+  #if expression
+  text-if-true
+  #else /* Not expression */
+  text-if-false
+  #endif /* Not expression */
+
+If :samp:`{expression}` is nonzero, the :samp:`{text-if-true}` is included and
+the :samp:`{text-if-false}` is skipped.  If :samp:`{expression}` is zero, the
+opposite happens.
+
+You can use :samp:`#else` with :samp:`#ifdef` and :samp:`#ifndef`, too.
+
+.. index:: #elif
+
+.. _elif:
+
+Elif
+^^^^
+
+One common case of nested conditionals is used to check for more than two
+possible alternatives.  For example, you might have
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #else /* X != 1 */
+  #if X == 2
+  ...
+  #else /* X != 2 */
+  ...
+  #endif /* X != 2 */
+  #endif /* X != 1 */
+
+Another conditional directive, :samp:`#elif`, allows this to be
+abbreviated as follows:
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #elif X == 2
+  ...
+  #else /* X != 2 and X != 1*/
+  ...
+  #endif /* X != 2 and X != 1*/
+
+:samp:`#elif` stands for 'else if'.  Like :samp:`#else`, it goes in the
+middle of a conditional group and subdivides it; it does not require a
+matching :samp:`#endif` of its own.  Like :samp:`#if`, the :samp:`#elif`
+directive includes an expression to be tested.  The text following the
+:samp:`#elif` is processed only if the original :samp:`#if`-condition
+failed and the :samp:`#elif` condition succeeds.
+
+More than one :samp:`#elif` can go in the same conditional group.  Then
+the text after each :samp:`#elif` is processed only if the :samp:`#elif`
+condition succeeds after the original :samp:`#if` and all previous
+:samp:`#elif` directives within it have failed.
+
+:samp:`#else` is allowed after any number of :samp:`#elif` directives, but
+:samp:`#elif` may not follow :samp:`#else`.
+
+.. index:: __has_attribute
+
+__has_attribute
+^^^^^^^^^^^^^^^
+
+The special operator ``__has_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions to test whether the attribute
+referenced by its :samp:`{operand}` is recognized by GCC.  Using the operator
+in other contexts is not valid.  In C code, if compiling for strict
+conformance to standards before C2x, :samp:`{operand}` must be
+a valid identifier.  Otherwise, :samp:`{operand}` may be optionally
+introduced by the ``attribute-scope::`` prefix.
+The :samp:`{attribute-scope}` prefix identifies the 'namespace' within
+which the attribute is recognized.  The scope of GCC attributes is
+:samp:`gnu` or :samp:`__gnu__`.  The ``__has_attribute`` operator by
+itself, without any :samp:`{operand}` or parentheses, acts as a predefined
+macro so that support for it can be tested in portable code.  Thus,
+the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_attribute
+  #  if __has_attribute (nonnull)
+  #    define ATTR_NONNULL __attribute__ ((nonnull))
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_attribute`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression as
+shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_attribute && __has_attribute (nonnull)   /* not portable */
+  ...
+  #endif
+
+.. index:: __has_cpp_attribute
+
+__has_cpp_attribute
+^^^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_cpp_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions in C++ code to test whether
+the attribute referenced by its :samp:`{operand}` is recognized by GCC.
+``__has_cpp_attribute (operand)`` is equivalent to
+``__has_attribute (operand)`` except that when :samp:`{operand}`
+designates a supported standard attribute it evaluates to an integer
+constant of the form ``YYYYMM`` indicating the year and month when
+the attribute was first introduced into the C++ standard.  For additional
+information including the dates of the introduction of current standard
+attributes, see `SD-6: SG10 Feature Test Recommendations <https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations/>`_.
+
+.. index:: __has_c_attribute
+
+__has_c_attribute
+^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_c_attribute (operand)`` may be
+used in :samp:`#if` and :samp:`#elif` expressions in C code to test
+whether the attribute referenced by its :samp:`{operand}` is recognized by
+GCC in attributes using the :samp:`[[]]` syntax.  GNU attributes must
+be specified with the scope :samp:`gnu` or :samp:`__gnu__` with
+``__has_c_attribute``.  When :samp:`{operand}` designates a supported
+standard attribute it evaluates to an integer constant of the form
+``YYYYMM`` indicating the year and month when the attribute was
+first introduced into the C standard, or when the syntax of operands
+to the attribute was extended in the C standard.
+
+.. index:: __has_builtin
+
+__has_builtin
+^^^^^^^^^^^^^
+
+The special operator ``__has_builtin (operand)`` may be used in
+constant integer contexts and in preprocessor :samp:`#if` and :samp:`#elif`
+expressions to test whether the symbol named by its :samp:`{operand}` is
+recognized as a built-in function by GCC in the current language and
+conformance mode.  It evaluates to a constant integer with a nonzero
+value if the argument refers to such a function, and to zero otherwise.
+The operator may also be used in preprocessor :samp:`#if` and :samp:`#elif`
+expressions.  The ``__has_builtin`` operator by itself, without any
+:samp:`{operand}` or parentheses, acts as a predefined macro so that support
+for it can be tested in portable code.  Thus, the recommended use of
+the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_builtin
+  #  if __has_builtin (__builtin_object_size)
+  #    define builtin_object_size(ptr) __builtin_object_size (ptr, 2)
+  #  endif
+  #endif
+  #ifndef builtin_object_size
+  #  define builtin_object_size(ptr)   ((size_t)-1)
+  #endif
+
+.. index:: __has_include
+
+__has_include
+^^^^^^^^^^^^^
+
+The special operator ``__has_include (operand)`` may be used in
+:samp:`#if` and :samp:`#elif` expressions to test whether the header referenced
+by its :samp:`{operand}` can be included using the :samp:`#include` directive.  Using
+the operator in other contexts is not valid.  The :samp:`{operand}` takes
+the same form as the file in the :samp:`#include` directive (see :ref:`include-syntax`) and evaluates to a nonzero value if the header can be included and
+to zero otherwise.  Note that that the ability to include a header doesn't
+imply that the header doesn't contain invalid constructs or :samp:`#error`
+directives that would cause the preprocessor to fail.
+
+The ``__has_include`` operator by itself, without any :samp:`{operand}` or
+parentheses, acts as a predefined macro so that support for it can be tested
+in portable code.  Thus, the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_include
+  #  if __has_include (<stdatomic.h>)
+  #    include <stdatomic.h>
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_include`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression
+as shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_include && __has_include ("header.h")   /* not portable */
+  ...
+  #endif
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-uses.rst b/gcc/doc/cpp/conditional-uses.rst
new file mode 100644
index 00000000000..59555a5828d
--- /dev/null
+++ b/gcc/doc/cpp/conditional-uses.rst
@@ -0,0 +1,32 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _conditional-uses:
+
+Conditional Uses
+****************
+
+There are three general reasons to use a conditional.
+
+* A program may need to use different code depending on the machine or
+  operating system it is to run on.  In some cases the code for one
+  operating system may be erroneous on another operating system; for
+  example, it might refer to data types or constants that do not exist on
+  the other system.  When this happens, it is not enough to avoid
+  executing the invalid code.  Its mere presence will cause the compiler
+  to reject the program.  With a preprocessing conditional, the offending
+  code can be effectively excised from the program when it is not valid.
+
+* You may want to be able to compile the same source file into two
+  different programs.  One version might make frequent time-consuming
+  consistency checks on its intermediate data, or print the values of
+  those data for debugging, and the other not.
+
+* A conditional whose condition is always false is one way to exclude code
+  from the program but keep it as a sort of comment for future reference.
+
+Simple programs that do not need system-specific logic or complex
+debugging hooks generally will not need to use preprocessing
+conditionals.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditionals.rst b/gcc/doc/cpp/conditionals.rst
new file mode 100644
index 00000000000..381a6124da4
--- /dev/null
+++ b/gcc/doc/cpp/conditionals.rst
@@ -0,0 +1,44 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: conditionals
+
+.. _conditionals:
+
+Conditionals
+------------
+
+A :dfn:`conditional` is a directive that instructs the preprocessor to
+select whether or not to include a chunk of code in the final token
+stream passed to the compiler.  Preprocessor conditionals can test
+arithmetic expressions, or whether a name is defined as a macro, or both
+simultaneously using the special ``defined`` operator.
+
+A conditional in the C preprocessor resembles in some ways an ``if``
+statement in C, but it is important to understand the difference between
+them.  The condition in an ``if`` statement is tested during the
+execution of your program.  Its purpose is to allow your program to
+behave differently from run to run, depending on the data it is
+operating on.  The condition in a preprocessing conditional directive is
+tested when your program is compiled.  Its purpose is to allow different
+code to be included in the program depending on the situation at the
+time of compilation.
+
+However, the distinction is becoming less clear.  Modern compilers often
+do test ``if`` statements when a program is compiled, if their
+conditions are known not to vary at run time, and eliminate code which
+can never be executed.  If you can count on your compiler to do this,
+you may find that your program is more readable if you use ``if``
+statements with constant conditions (perhaps determined by macros).  Of
+course, you can only use this to exclude code, not type definitions or
+other preprocessing directives, and you can only do it if the code
+remains syntactically valid when it is not to be used.
+
+.. toctree::
+  :maxdepth: 2
+
+  conditional-uses
+  conditional-syntax
+  deleted-code
\ No newline at end of file
diff --git a/gcc/doc/cpp/conf.py b/gcc/doc/cpp/conf.py
new file mode 100644
index 00000000000..29d3aed4558
--- /dev/null
+++ b/gcc/doc/cpp/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'cpp'
+project = 'The C Preprocessor'
+copyright = '1987-2022 Free Software Foundation, Inc.'
+authors = 'Richard M. Stallman, Zachary Weinberg'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invocation', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/doc/cpp/copyright.rst b/gcc/doc/cpp/copyright.rst
new file mode 100644
index 00000000000..fa61190ddf7
--- /dev/null
+++ b/gcc/doc/cpp/copyright.rst
@@ -0,0 +1,24 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, the Front-Cover Texts being (a) (see below), and
+with the Back-Cover Texts being (b) (see below).
+A copy of the license is included in the :ref:`gnu_fdl`.
+
+(a) The FSF's Front-Cover Text is:
+
+     A GNU Manual
+
+(b) The FSF's Back-Cover Text is:
+
+     You have freedom to copy and modify this GNU Manual, like GNU
+     software.  Copies published by the Free Software Foundation raise
+     funds for GNU development.
\ No newline at end of file
diff --git a/gcc/doc/cpp/deleted-code.rst b/gcc/doc/cpp/deleted-code.rst
new file mode 100644
index 00000000000..758e0c1c0a3
--- /dev/null
+++ b/gcc/doc/cpp/deleted-code.rst
@@ -0,0 +1,34 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: commenting out code
+
+.. _deleted-code:
+
+Deleted Code
+************
+
+If you replace or delete a part of the program but want to keep the old
+code around for future reference, you often cannot simply comment it
+out.  Block comments do not nest, so the first comment inside the old
+code will end the commenting-out.  The probable result is a flood of
+syntax errors.
+
+One way to avoid this problem is to use an always-false conditional
+instead.  For instance, put ``#if 0`` before the deleted code and
+``#endif`` after it.  This works even if the code being turned
+off contains conditionals, but they must be entire conditionals
+(balanced :samp:`#if` and :samp:`#endif`).
+
+Some people use ``#ifdef notdef`` instead.  This is risky, because
+``notdef`` might be accidentally defined as a macro, and then the
+conditional would succeed.  ``#if 0`` can be counted on to fail.
+
+Do not use ``#if 0`` for comments which are not C code.  Use a real
+comment, instead.  The interior of ``#if 0`` must consist of complete
+tokens; in particular, single-quote characters must balance.  Comments
+often contain unbalanced single-quote characters (known in English as
+apostrophes).  These confuse ``#if 0``.  They don't confuse
+:samp:`/*`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/diagnostics.rst b/gcc/doc/cpp/diagnostics.rst
new file mode 100644
index 00000000000..beaad7d8217
--- /dev/null
+++ b/gcc/doc/cpp/diagnostics.rst
@@ -0,0 +1,51 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: diagnostic, reporting errors, reporting warnings, #error
+
+.. _diagnostics:
+
+Diagnostics
+-----------
+
+The directive :samp:`#error` causes the preprocessor to report a fatal
+error.  The tokens forming the rest of the line following :samp:`#error`
+are used as the error message.
+
+You would use :samp:`#error` inside of a conditional that detects a
+combination of parameters which you know the program does not properly
+support.  For example, if you know that the program will not run
+properly on a VAX, you might write
+
+.. code-block:: c++
+
+  #ifdef __vax__
+  #error "Won't work on VAXen.  See comments at get_last_object."
+  #endif
+
+If you have several configuration parameters that must be set up by
+the installation in a consistent way, you can use conditionals to detect
+an inconsistency and report it with :samp:`#error`.  For example,
+
+.. code-block:: c++
+
+  #if !defined(FOO) && defined(BAR)
+  #error "BAR requires FOO."
+  #endif
+
+.. index:: #warning
+
+The directive :samp:`#warning` is like :samp:`#error`, but causes the
+preprocessor to issue a warning and continue preprocessing.  The tokens
+following :samp:`#warning` are used as the warning message.
+
+You might use :samp:`#warning` in obsolete header files, with a message
+directing the user to the header file which should be used instead.
+
+Neither :samp:`#error` nor :samp:`#warning` macro-expands its argument.
+Internal whitespace sequences are each replaced with a single space.
+The line must consist of complete tokens.  It is wisest to make the
+argument of these directives be a single string constant; this avoids
+problems with apostrophes and the like.
\ No newline at end of file
diff --git a/gcc/doc/cpp/environment-variables.rst b/gcc/doc/cpp/environment-variables.rst
new file mode 100644
index 00000000000..c0ab7992905
--- /dev/null
+++ b/gcc/doc/cpp/environment-variables.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: environment variables
+
+.. _environment-variables:
+
+Environment Variables
+---------------------
+
+This section describes the environment variables that affect how CPP
+operates.  You can use them to specify directories or prefixes to use
+when searching for include files, or to control dependency output.
+
+Note that you can also specify places to search using options such as
+:option:`-I`, and control dependency output with options like
+:option:`-M` (see :ref:`invocation`).  These take precedence over
+environment variables, which in turn take precedence over the
+configuration of GCC.
+
+.. include:: ../../../doc/cppenv.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/gnu-free-documentation-license.rst b/gcc/doc/cpp/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/doc/cpp/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files.rst b/gcc/doc/cpp/header-files.rst
new file mode 100644
index 00000000000..13b9841c3c6
--- /dev/null
+++ b/gcc/doc/cpp/header-files.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: header file
+
+.. _header-files:
+
+Header Files
+------------
+
+A header file is a file containing C declarations and macro definitions
+(see :ref:`macros`) to be shared between several source files.  You request
+the use of a header file in your program by :dfn:`including` it, with the
+C preprocessing directive :samp:`#include`.
+
+Header files serve two purposes.
+
+.. index:: system header files
+
+* System header files declare the interfaces to parts of the operating
+  system.  You include them in your program to supply the definitions and
+  declarations you need to invoke system calls and libraries.
+
+* Your own header files contain declarations for interfaces between the
+  source files of your program.  Each time you have a group of related
+  declarations and macro definitions all or most of which are needed in
+  several different source files, it is a good idea to create a header
+  file for them.
+
+Including a header file produces the same results as copying the header
+file into each source file that needs it.  Such copying would be
+time-consuming and error-prone.  With a header file, the related
+declarations appear in only one place.  If they need to be changed, they
+can be changed in one place, and programs that include the header file
+will automatically use the new version when next recompiled.  The header
+file eliminates the labor of finding and changing all the copies as well
+as the risk that a failure to find one copy will result in
+inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with
+:samp:`.h`.  It is most portable to use only letters, digits, dashes, and
+underscores in header file names, and at most one dot.
+
+.. toctree::
+  :maxdepth: 2
+
+  header-files/include-syntax
+  header-files/include-operation
+  header-files/search-path
+  header-files/once-only-headers
+  header-files/alternatives-to-wrapper-ifndef
+  header-files/computed-includes
+  header-files/wrapper-headers
+  header-files/system-headers
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
new file mode 100644
index 00000000000..e38cffeaf38
--- /dev/null
+++ b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
@@ -0,0 +1,40 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _alternatives-to-wrapper-ifndef:
+
+Alternatives to Wrapper #ifndef
+*******************************
+
+CPP supports two more ways of indicating that a header file should be
+read only once.  Neither one is as portable as a wrapper :samp:`#ifndef`
+and we recommend you do not use them in new programs, with the caveat
+that :samp:`#import` is standard practice in Objective-C.
+
+.. index:: #import
+
+CPP supports a variant of :samp:`#include` called :samp:`#import` which
+includes a file, but does so at most once.  If you use :samp:`#import`
+instead of :samp:`#include`, then you don't need the conditionals
+inside the header file to prevent multiple inclusion of the contents.
+:samp:`#import` is standard in Objective-C, but is considered a
+deprecated extension in C and C++.
+
+:samp:`#import` is not a well designed feature.  It requires the users of
+a header file to know that it should only be included once.  It is much
+better for the header file's implementor to write the file so that users
+don't need to know this.  Using a wrapper :samp:`#ifndef` accomplishes
+this goal.
+
+In the present implementation, a single use of :samp:`#import` will
+prevent the file from ever being read again, by either :samp:`#import` or
+:samp:`#include`.  You should not rely on this; do not use both
+:samp:`#import` and :samp:`#include` to refer to the same header file.
+
+Another way to prevent a header file from being included more than once
+is with the :samp:`#pragma once` directive (see :ref:`pragmas`).
+:samp:`#pragma once` does not have the problems that :samp:`#import` does,
+but it is not recognized by all preprocessors, so you cannot rely on it
+in a portable program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/computed-includes.rst b/gcc/doc/cpp/header-files/computed-includes.rst
new file mode 100644
index 00000000000..49c16228032
--- /dev/null
+++ b/gcc/doc/cpp/header-files/computed-includes.rst
@@ -0,0 +1,86 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: computed includes, macros in include
+
+.. _computed-includes:
+
+Computed Includes
+*****************
+
+Sometimes it is necessary to select one of several different header
+files to be included into your program.  They might specify
+configuration parameters to be used on different sorts of operating
+systems, for instance.  You could do this with a series of conditionals,
+
+.. code-block:: c++
+
+  #if SYSTEM_1
+  # include "system_1.h"
+  #elif SYSTEM_2
+  # include "system_2.h"
+  #elif SYSTEM_3
+  ...
+  #endif
+
+That rapidly becomes tedious.  Instead, the preprocessor offers the
+ability to use a macro for the header name.  This is called a
+:dfn:`computed include`.  Instead of writing a header name as the direct
+argument of :samp:`#include`, you simply put a macro name there instead:
+
+.. code-block:: c++
+
+  #define SYSTEM_H "system_1.h"
+  ...
+  #include SYSTEM_H
+
+``SYSTEM_H`` will be expanded, and the preprocessor will look for
+:samp:`system_1.h` as if the :samp:`#include` had been written that way
+originally.  ``SYSTEM_H`` could be defined by your Makefile with a
+:option:`-D` option.
+
+You must be careful when you define the macro.  :samp:`#define` saves
+tokens, not text.  The preprocessor has no way of knowing that the macro
+will be used as the argument of :samp:`#include`, so it generates
+ordinary tokens, not a header name.  This is unlikely to cause problems
+if you use double-quote includes, which are close enough to string
+constants.  If you use angle brackets, however, you may have trouble.
+
+The syntax of a computed include is actually a bit more general than the
+above.  If the first non-whitespace character after :samp:`#include` is
+not :samp:`"` or :samp:`<`, then the entire line is macro-expanded
+like running text would be.
+
+If the line expands to a single string constant, the contents of that
+string constant are the file to be included.  CPP does not re-examine the
+string for embedded quotes, but neither does it process backslash
+escapes in the string.  Therefore
+
+.. code-block:: c++
+
+  #define HEADER "a\"b"
+  #include HEADER
+
+looks for a file named :samp:`a\\"b`.  CPP searches for the file according
+to the rules for double-quoted includes.
+
+If the line expands to a token stream beginning with a :samp:`<` token
+and including a :samp:`>` token, then the tokens between the :samp:`<` and
+the first :samp:`>` are combined to form the filename to be included.
+Any whitespace between tokens is reduced to a single space; then any
+space after the initial :samp:`<` is retained, but a trailing space
+before the closing :samp:`>` is ignored.  CPP searches for the file
+according to the rules for angle-bracket includes.
+
+In either case, if there are any tokens on the line after the file name,
+an error occurs and the directive is not processed.  It is also an error
+if the result of expansion does not match either of the two expected
+forms.
+
+These rules are implementation-defined behavior according to the C
+standard.  To minimize the risk of different compilers interpreting your
+computed includes differently, we recommend you use only a single
+object-like macro which expands to a string constant.  This will also
+minimize confusion for people reading your program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-operation.rst b/gcc/doc/cpp/header-files/include-operation.rst
new file mode 100644
index 00000000000..465905698e7
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-operation.rst
@@ -0,0 +1,67 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _include-operation:
+
+Include Operation
+*****************
+
+The :samp:`#include` directive works by directing the C preprocessor to
+scan the specified file as input before continuing with the rest of the
+current file.  The output from the preprocessor contains the output
+already generated, followed by the output resulting from the included
+file, followed by the output that comes from the text after the
+:samp:`#include` directive.  For example, if you have a header file
+:samp:`header.h` as follows,
+
+.. code-block:: c++
+
+  char *test (void);
+
+and a main program called :samp:`program.c` that uses the header file,
+like this,
+
+.. code-block:: c++
+
+  int x;
+  #include "header.h"
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+the compiler will see the same token stream as it would if
+:samp:`program.c` read
+
+.. code-block:: c++
+
+  int x;
+  char *test (void);
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+Included files are not limited to declarations and macro definitions;
+those are merely the typical uses.  Any fragment of a C program can be
+included from another file.  The include file could even contain the
+beginning of a statement that is concluded in the containing file, or
+the end of a statement that was started in the including file.  However,
+an included file must consist of complete tokens.  Comments and string
+literals which have not been closed by the end of an included file are
+invalid.  For error recovery, they are considered to end at the end of
+the file.
+
+To avoid confusion, it is best if header files contain only complete
+syntactic units---function declarations or definitions, type
+declarations, etc.
+
+The line following the :samp:`#include` directive is always treated as a
+separate line by the C preprocessor, even if the included file lacks a
+final newline.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-syntax.rst b/gcc/doc/cpp/header-files/include-syntax.rst
new file mode 100644
index 00000000000..a378dfc5375
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-syntax.rst
@@ -0,0 +1,42 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #include
+
+.. _include-syntax:
+
+Include Syntax
+**************
+
+Both user and system header files are included using the preprocessing
+directive :samp:`#include`.  It has two variants:
+
+:samp:`#include <{file}>`
+  This variant is used for system header files.  It searches for a file
+  named :samp:`{file}` in a standard list of system directories.  You can prepend
+  directories to this list with the :option:`-I` option (see :ref:`invocation`).
+
+:samp:`#include "{file}"`
+  This variant is used for header files of your own program.  It
+  searches for a file named :samp:`{file}` first in the directory containing
+  the current file, then in the quote directories and then the same
+  directories used for ``<file>``.  You can prepend directories
+  to the list of quote directories with the :option:`-iquote` option.
+
+The argument of :samp:`#include`, whether delimited with quote marks or
+angle brackets, behaves like a string constant in that comments are not
+recognized, and macro names are not expanded.  Thus, ``#include
+<x/*y>`` specifies inclusion of a system header file named :samp:`x/*y`.
+
+However, if backslashes occur within :samp:`{file}`, they are considered
+ordinary text characters, not escape characters.  None of the character
+escape sequences appropriate to string constants in C are processed.
+Thus, ``#include "x\n\\y"`` specifies a filename containing three
+backslashes.  (Some systems interpret :samp:`\\` as a pathname separator.
+All of these also interpret :samp:`/` the same way.  It is most portable
+to use only :samp:`/`.)
+
+It is an error if there is anything (other than comments) on the line
+after the file name.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/once-only-headers.rst b/gcc/doc/cpp/header-files/once-only-headers.rst
new file mode 100644
index 00000000000..2ee77771620
--- /dev/null
+++ b/gcc/doc/cpp/header-files/once-only-headers.rst
@@ -0,0 +1,52 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: repeated inclusion, including just once, wrapper #ifndef
+
+.. _once-only-headers:
+
+Once-Only Headers
+*****************
+
+If a header file happens to be included twice, the compiler will process
+its contents twice.  This is very likely to cause an error, e.g. when the
+compiler sees the same structure definition twice.  Even if it does not,
+it will certainly waste time.
+
+The standard way to prevent this is to enclose the entire real contents
+of the file in a conditional, like this:
+
+.. code-block:: c++
+
+  /* File foo.  */
+  #ifndef FILE_FOO_SEEN
+  #define FILE_FOO_SEEN
+
+  the entire file
+
+  #endif /* !FILE_FOO_SEEN */
+
+This construct is commonly known as a :dfn:`wrapper #ifndef`.
+When the header is included again, the conditional will be false,
+because ``FILE_FOO_SEEN`` is defined.  The preprocessor will skip
+over the entire contents of the file, and the compiler will not see it
+twice.
+
+CPP optimizes even further.  It remembers when a header file has a
+wrapper :samp:`#ifndef`.  If a subsequent :samp:`#include` specifies that
+header, and the macro in the :samp:`#ifndef` is still defined, it does
+not bother to rescan the file at all.
+
+You can put comments outside the wrapper.  They will not interfere with
+this optimization.
+
+.. index:: controlling macro, guard macro
+
+The macro ``FILE_FOO_SEEN`` is called the :dfn:`controlling macro` or
+:dfn:`guard macro`.  In a user header file, the macro name should not
+begin with :samp:`_`.  In a system header file, it should begin with
+:samp:`__` to avoid conflicts with user programs.  In any kind of header
+file, the macro name should contain the name of the file and some
+additional text, to avoid conflicts with other header files.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/search-path.rst b/gcc/doc/cpp/header-files/search-path.rst
new file mode 100644
index 00000000000..9f87878517f
--- /dev/null
+++ b/gcc/doc/cpp/header-files/search-path.rst
@@ -0,0 +1,53 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _search-path:
+
+Search Path
+***********
+
+By default, the preprocessor looks for header files included by the quote
+form of the directive ``#include "file"`` first relative to
+the directory of the current file, and then in a preconfigured list
+of standard system directories.
+For example, if :samp:`/usr/include/sys/stat.h` contains
+``#include "types.h"``, GCC looks for :samp:`types.h` first in
+:samp:`/usr/include/sys`, then in its usual search path.
+
+For the angle-bracket form ``#include <file>``, the
+preprocessor's default behavior is to look only in the standard system
+directories.  The exact search directory list depends on the target
+system, how GCC is configured, and where it is installed.  You can
+find the default search directory list for your version of CPP by
+invoking it with the :option:`-v` option.  For example,
+
+.. code-block:: c++
+
+  cpp -v /dev/null -o /dev/null
+
+There are a number of command-line options you can use to add
+additional directories to the search path.
+The most commonly-used option is :option:`-Idir`, which causes
+:samp:`{dir}` to be searched after the current directory (for the quote
+form of the directive) and ahead of the standard system directories.
+You can specify multiple :option:`-I` options on the command line,
+in which case the directories are searched in left-to-right order.
+
+If you need separate control over the search paths for the quote and
+angle-bracket forms of the :samp:`#include` directive, you can use the
+:option:`-iquote` and/or :option:`-isystem` options instead of :option:`-I`.
+See :ref:`invocation`, for a detailed description of these options, as
+well as others that are less generally useful.
+
+If you specify other options on the command line, such as :option:`-I`,
+that affect where the preprocessor searches for header files, the
+directory list printed by the :option:`-v` option reflects the actual
+search path used by the preprocessor.
+
+Note that you can also prevent the preprocessor from searching any of
+the default system header directories with the :option:`-nostdinc`
+option.  This is useful when you are compiling an operating system
+kernel or some other program that does not use the standard C library
+facilities, or the standard C library itself.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/system-headers.rst b/gcc/doc/cpp/header-files/system-headers.rst
new file mode 100644
index 00000000000..ef6474f9dea
--- /dev/null
+++ b/gcc/doc/cpp/header-files/system-headers.rst
@@ -0,0 +1,41 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: system header files
+
+.. _system-headers:
+
+System Headers
+**************
+
+The header files declaring interfaces to the operating system and
+runtime libraries often cannot be written in strictly conforming C.
+Therefore, GCC gives code found in :dfn:`system headers` special
+treatment.  All warnings, other than those generated by :samp:`#warning`
+(see :ref:`diagnostics`), are suppressed while GCC is processing a system
+header.  Macros defined in a system header are immune to a few warnings
+wherever they are expanded.  This immunity is granted on an ad-hoc
+basis, when we find that a warning generates lots of false positives
+because of code in macros defined in system headers.
+
+Normally, only the headers found in specific directories are considered
+system headers.  These directories are determined when GCC is compiled.
+There are, however, two ways to make normal headers into system headers:
+
+* Header files found in directories added to the search path with the
+  :option:`-isystem` and :option:`-idirafter` command-line options are
+  treated as system headers for the purposes of diagnostics.
+
+*
+  .. index:: #pragma GCC system_header
+
+  There is also a directive, ``#pragma GCC system_header``, which
+  tells GCC to consider the rest of the current include file a system
+  header, no matter where it was found.  Code that comes before the
+  :samp:`#pragma` in the file is not affected.  ``#pragma GCC
+  system_header`` has no effect in the primary source file.
+
+On some targets, such as RS/6000 AIX, GCC implicitly surrounds all
+system headers with an :samp:`extern "C"` block when compiling as C++.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/wrapper-headers.rst b/gcc/doc/cpp/header-files/wrapper-headers.rst
new file mode 100644
index 00000000000..848170e138e
--- /dev/null
+++ b/gcc/doc/cpp/header-files/wrapper-headers.rst
@@ -0,0 +1,58 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: wrapper headers, overriding a header file, #include_next
+
+.. _wrapper-headers:
+
+Wrapper Headers
+***************
+
+Sometimes it is necessary to adjust the contents of a system-provided
+header file without editing it directly.  GCC's :command:`fixincludes`
+operation does this, for example.  One way to do that would be to create
+a new header file with the same name and insert it in the search path
+before the original header.  That works fine as long as you're willing
+to replace the old header entirely.  But what if you want to refer to
+the old header from the new one?
+
+You cannot simply include the old header with :samp:`#include`.  That
+will start from the beginning, and find your new header again.  If your
+header is not protected from multiple inclusion (see :ref:`once-only-headers`), it will recurse infinitely and cause a fatal error.
+
+You could include the old header with an absolute pathname:
+
+.. code-block:: c++
+
+  #include "/usr/include/old-header.h"
+
+This works, but is not clean; should the system headers ever move, you
+would have to edit the new headers to match.
+
+There is no way to solve this problem within the C standard, but you can
+use the GNU extension :samp:`#include_next`.  It means, 'Include the
+*next* file with this name'.  This directive works like
+:samp:`#include` except in searching for the specified file: it starts
+searching the list of header file directories *after* the directory
+in which the current file was found.
+
+Suppose you specify :option:`-I /usr/local/include`, and the list of
+directories to search also includes :samp:`/usr/include`; and suppose
+both directories contain :samp:`signal.h`.  Ordinary ``#include
+<signal.h>`` finds the file under :samp:`/usr/local/include`.  If that
+file contains ``#include_next <signal.h>``, it starts searching
+after that directory, and finds the file in :samp:`/usr/include`.
+
+:samp:`#include_next` does not distinguish between ``<file>``
+and ``"file"`` inclusion, nor does it check that the file you
+specify has the same name as the current file.  It simply looks for the
+file named, starting with the directory in the search path after the one
+where the current file was found.
+
+The use of :samp:`#include_next` can lead to great confusion.  We
+recommend it be used only when there is no other alternative.  In
+particular, it should not be used in the headers belonging to a specific
+program; it should be used only to make global corrections along the
+lines of :command:`fixincludes`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-defined-behavior.rst b/gcc/doc/cpp/implementation-defined-behavior.rst
new file mode 100644
index 00000000000..8946520eefe
--- /dev/null
+++ b/gcc/doc/cpp/implementation-defined-behavior.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-defined-behavior:
+
+.. _identifier-characters:
+
+Implementation-defined behavior
+*******************************
+
+This is how CPP behaves in all the cases which the C standard
+describes as :dfn:`implementation-defined`.  This term means that the
+implementation is free to do what it likes, but must document its choice
+and stick to it.
+
+.. todo:: Check the C++ standard for more implementation-defined stuff.
+
+* The mapping of physical source file multi-byte characters to the
+  execution character set.
+
+  The input character set can be specified using the
+  :option:`-finput-charset` option, while the execution character set may
+  be controlled using the :option:`-fexec-charset` and
+  :option:`-fwide-exec-charset` options.
+
+* Identifier characters.
+
+  The C and C++ standards allow identifiers to be composed of :samp:`_`
+  and the alphanumeric characters.  C++ also allows universal character
+  names.  C99 and later C standards permit both universal character
+  names and implementation-defined characters.  In both C and C++ modes,
+  GCC accepts in identifiers exactly those extended characters that
+  correspond to universal character names permitted by the chosen
+  standard.
+
+  GCC allows the :samp:`$` character in identifiers as an extension for
+  most targets.  This is true regardless of the std= switch,
+  since this extension cannot conflict with standards-conforming
+  programs.  When preprocessing assembler, however, dollars are not
+  identifier characters by default.
+
+  Currently the targets that by default do not permit :samp:`$` are AVR,
+  IP2K, MMIX, MIPS Irix 3, ARM aout, and PowerPC targets for the AIX
+  operating system.
+
+  You can override the default with :option:`-fdollars-in-identifiers` or
+  :option:`-fno-dollars-in-identifiers`.  See :option:`-fdollars-in-identifiers`.
+
+* Non-empty sequences of whitespace characters.
+
+  In textual output, each whitespace sequence is collapsed to a single
+  space.  For aesthetic reasons, the first token on each non-directive
+  line of output is preceded with sufficient spaces that it appears in the
+  same column as it did in the original source file.
+
+* The numeric value of character constants in preprocessor expressions.
+
+  The preprocessor and compiler interpret character constants in the
+  same way; i.e. escape sequences such as :samp:`\\a` are given the
+  values they would have on the target machine.
+
+  The compiler evaluates a multi-character character constant a character
+  at a time, shifting the previous value left by the number of bits per
+  target character, and then or-ing in the bit-pattern of the new
+  character truncated to the width of a target character.  The final
+  bit-pattern is given type ``int``, and is therefore signed,
+  regardless of whether single characters are signed or not.
+  If there are more
+  characters in the constant than would fit in the target ``int`` the
+  compiler issues a warning, and the excess leading characters are
+  ignored.
+
+  For example, ``'ab'`` for a target with an 8-bit ``char`` would be
+  interpreted as :samp:`(int) ((unsigned char) 'a' * 256 + (unsigned char)
+  'b')`, and ``'\234a'`` as :samp:`(int) ((unsigned char) '\\234' *
+  256 + (unsigned char) 'a')`.
+
+* Source file inclusion.
+
+  For a discussion on how the preprocessor locates header files,
+  :ref:`include-operation`.
+
+* Interpretation of the filename resulting from a macro-expanded
+  :samp:`#include` directive.
+
+  See :ref:`computed-includes`.
+
+* Treatment of a :samp:`#pragma` directive that after macro-expansion
+  results in a standard pragma.
+
+  No macro expansion occurs on any :samp:`#pragma` directive line, so the
+  question does not arise.
+
+  Note that GCC does not yet implement any of the standard
+  pragmas.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-details.rst b/gcc/doc/cpp/implementation-details.rst
new file mode 100644
index 00000000000..326277b1fc9
--- /dev/null
+++ b/gcc/doc/cpp/implementation-details.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-details:
+
+Implementation Details
+----------------------
+
+Here we document details of how the preprocessor's implementation
+affects its user-visible behavior.  You should try to avoid undue
+reliance on behavior described here, as it is possible that it will
+change subtly in future implementations.
+
+Also documented here are obsolete features still supported by CPP.
+
+.. toctree::
+  :maxdepth: 2
+
+  implementation-defined-behavior
+  implementation-limits
+  obsolete-features
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-limits.rst b/gcc/doc/cpp/implementation-limits.rst
new file mode 100644
index 00000000000..18cfc6ab0a6
--- /dev/null
+++ b/gcc/doc/cpp/implementation-limits.rst
@@ -0,0 +1,68 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: implementation limits
+
+.. _implementation-limits:
+
+Implementation limits
+*********************
+
+CPP has a small number of internal limits.  This section lists the
+limits which the C standard requires to be no lower than some minimum,
+and all the others known.  It is intended that there should be as few limits
+as possible.  If you encounter an undocumented or inconvenient limit,
+please report that as a bug.  See :ref:`gcc:bugs`.
+
+Where we say something is limited :dfn:`only by available memory`, that
+means that internal data structures impose no intrinsic limit, and space
+is allocated with ``malloc`` or equivalent.  The actual limit will
+therefore depend on many things, such as the size of other things
+allocated by the compiler at the same time, the amount of memory
+consumed by other processes on the same computer, etc.
+
+* Nesting levels of :samp:`#include` files.
+
+  We impose an arbitrary limit of 200 levels, to avoid runaway recursion.
+  The standard requires at least 15 levels.
+
+* Nesting levels of conditional inclusion.
+
+  The C standard mandates this be at least 63.  CPP is limited only by
+  available memory.
+
+* Levels of parenthesized expressions within a full expression.
+
+  The C standard requires this to be at least 63.  In preprocessor
+  conditional expressions, it is limited only by available memory.
+
+* Significant initial characters in an identifier or macro name.
+
+  The preprocessor treats all characters as significant.  The C standard
+  requires only that the first 63 be significant.
+
+* Number of macros simultaneously defined in a single translation unit.
+
+  The standard requires at least 4095 be possible.  CPP is limited only
+  by available memory.
+
+* Number of parameters in a macro definition and arguments in a macro call.
+
+  We allow ``USHRT_MAX``, which is no smaller than 65,535.  The minimum
+  required by the standard is 127.
+
+* Number of characters on a logical source line.
+
+  The C standard requires a minimum of 4096 be permitted.  CPP places
+  no limits on this, but you may get incorrect column numbers reported in
+  diagnostics for lines longer than 65,535 characters.
+
+* Maximum size of a source file.
+
+  The standard does not specify any lower limit on the maximum size of a
+  source file.  GNU cpp maps files into memory, so it is limited by the
+  available address space.  This is generally at least two gigabytes.
+  Depending on the operating system, the size of physical memory may or
+  may not be a limitation.
\ No newline at end of file
diff --git a/gcc/doc/cpp/index.rst b/gcc/doc/cpp/index.rst
new file mode 100644
index 00000000000..e19dfba42a6
--- /dev/null
+++ b/gcc/doc/cpp/index.rst
@@ -0,0 +1,35 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The C Preprocessor
+==================
+
+The C preprocessor implements the macro language used to transform C,
+C++, and Objective-C programs before they are compiled.  It can also be
+useful on its own.
+
+.. only:: html
+
+  Contents:
+
+.. toctree::
+
+  copyright
+  overview
+  header-files
+  macros
+  conditionals
+  diagnostics
+  line-control
+  pragmas
+  other-directives
+  preprocessor-output
+  traditional-mode
+  implementation-details
+  invocation
+  environment-variables
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/doc/cpp/indices-and-tables.rst b/gcc/doc/cpp/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/doc/cpp/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/initial-processing.rst b/gcc/doc/cpp/initial-processing.rst
new file mode 100644
index 00000000000..9ca96f21428
--- /dev/null
+++ b/gcc/doc/cpp/initial-processing.rst
@@ -0,0 +1,164 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _initial-processing:
+
+Initial processing
+******************
+
+The preprocessor performs a series of textual transformations on its
+input.  These happen before all other processing.  Conceptually, they
+happen in a rigid order, and the entire file is run through each
+transformation before the next one begins.  CPP actually does them
+all at once, for performance reasons.  These transformations correspond
+roughly to the first three 'phases of translation' described in the C
+standard.
+
+.. index:: line endings
+
+* The input file is read into memory and broken into lines.
+
+  Different systems use different conventions to indicate the end of a
+  line.  GCC accepts the ASCII control sequences LF, CR
+  LF and CR as end-of-line markers.  These are the canonical
+  sequences used by Unix, DOS and VMS, and the classic Mac OS (before
+  OSX) respectively.  You may therefore safely copy source code written
+  on any of those systems to a different one and use it without
+  conversion.  (GCC may lose track of the current line number if a file
+  doesn't consistently use one convention, as sometimes happens when it
+  is edited on computers with different conventions that share a network
+  file system.)
+
+  If the last line of any input file lacks an end-of-line marker, the end
+  of the file is considered to implicitly supply one.  The C standard says
+  that this condition provokes undefined behavior, so GCC will emit a
+  warning message.
+
+.. index:: trigraphs
+
+.. _trigraphs:
+
+* If trigraphs are enabled, they are replaced by their
+  corresponding single characters.  By default GCC ignores trigraphs,
+  but if you request a strictly conforming mode with the :option:`-std`
+  option, or you specify the :option:`-trigraphs` option, then it
+  converts them.
+
+  These are nine three-character sequences, all starting with :samp:`??`,
+  that are defined by ISO C to stand for single characters.  They permit
+  obsolete systems that lack some of C's punctuation to use C.  For
+  example, :samp:`??/` stands for :samp:`\\`, so ``'??/n'`` is a character
+  constant for a newline.
+
+  Trigraphs are not popular and many compilers implement them
+  incorrectly.  Portable code should not rely on trigraphs being either
+  converted or ignored.  With :option:`-Wtrigraphs` GCC will warn you
+  when a trigraph may change the meaning of your program if it were
+  converted.  See :ref:`wtrigraphs`.
+
+  In a string constant, you can prevent a sequence of question marks
+  from being confused with a trigraph by inserting a backslash between
+  the question marks, or by separating the string literal at the
+  trigraph and making use of string literal concatenation.  ``"(??\?)"``
+  is the string :samp:`(???)`, not :samp:`(?]`.  Traditional C compilers
+  do not recognize these idioms.
+
+  The nine trigraphs and their replacements are
+
+  .. code-block::
+
+    Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+    Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+.. index:: continued lines, backslash-newline
+
+* Continued lines are merged into one long line.
+
+  A continued line is a line which ends with a backslash, :samp:`\\`.  The
+  backslash is removed and the following line is joined with the current
+  one.  No space is inserted, so you may split a line anywhere, even in
+  the middle of a word.  (It is generally more readable to split lines
+  only at white space.)
+
+  The trailing backslash on a continued line is commonly referred to as a
+  :dfn:`backslash-newline`.
+
+  If there is white space between a backslash and the end of a line, that
+  is still a continued line.  However, as this is usually the result of an
+  editing mistake, and many compilers will not accept it as a continued
+  line, GCC will warn you about it.
+
+.. index:: comments, line comments, block comments
+
+* All comments are replaced with single spaces.
+
+  There are two kinds of comments.  :dfn:`Block comments` begin with
+  :samp:`/*` and continue until the next :samp:`*/`.  Block comments do not
+  nest:
+
+  .. code-block:: c++
+
+    /* this is /* one comment */ text outside comment
+
+  :dfn:`Line comments` begin with :samp:`//` and continue to the end of the
+  current line.  Line comments do not nest either, but it does not matter,
+  because they would end in the same place anyway.
+
+  .. code-block:: c++
+
+    // this is // one comment
+    text outside comment
+
+It is safe to put line comments inside block comments, or vice versa.
+
+.. code-block:: c++
+
+  /* block comment
+     // contains line comment
+     yet more comment
+   */ outside comment
+
+  // line comment /* contains block comment */
+
+But beware of commenting out one end of a block comment with a line
+comment.
+
+.. code-block::
+
+   // l.c.  /* block comment begins
+      oops! this isn't a comment anymore */
+
+Comments are not recognized within string literals.
+``"/* blah */"`` is the string constant :samp:`/\* blah \*/`, not
+an empty string.
+
+Line comments are not in the 1989 edition of the C standard, but they
+are recognized by GCC as an extension.  In C++ and in the 1999 edition
+of the C standard, they are an official part of the language.
+
+Since these transformations happen before all other processing, you can
+split a line mechanically with backslash-newline anywhere.  You can
+comment out the end of a line.  You can continue a line comment onto the
+next line with backslash-newline.  You can even split :samp:`/*`,
+:samp:`*/`, and :samp:`//` onto multiple lines with backslash-newline.
+For example:
+
+.. code-block::
+
+  /\
+  *
+  */ # /*
+  */ defi\
+  ne FO\
+  O 10\
+  20
+
+is equivalent to ``#define FOO 1020``.  All these tricks are
+extremely confusing and should not be used in code intended to be
+readable.
+
+There is no way to prevent a backslash at the end of a line from being
+interpreted as a backslash-newline.  This cannot affect any correct
+program, however.
\ No newline at end of file
diff --git a/gcc/doc/cpp/invocation.rst b/gcc/doc/cpp/invocation.rst
new file mode 100644
index 00000000000..7b13980af5a
--- /dev/null
+++ b/gcc/doc/cpp/invocation.rst
@@ -0,0 +1,81 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: invocation, command line
+
+.. _invocation:
+
+Invocation
+----------
+
+Most often when you use the C preprocessor you do not have to invoke it
+explicitly: the C compiler does so automatically.  However, the
+preprocessor is sometimes useful on its own.  You can invoke the
+preprocessor either with the :command:`cpp` command, or via :command:`gcc -E`.
+In GCC, the preprocessor is actually integrated with the compiler
+rather than a separate program, and both of these commands invoke
+GCC and tell it to stop after the preprocessing phase.
+
+The :command:`cpp` options listed here are also accepted by
+:command:`gcc` and have the same meaning.  Likewise the :command:`cpp`
+command accepts all the usual :command:`gcc` driver options, although those
+pertaining to compilation phases after preprocessing are ignored.
+
+Only options specific to preprocessing behavior are documented here.
+Refer to the GCC manual for full documentation of other driver options.
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  cpp [ :option:`-D`:samp:`{macro}` [= :samp:`{defn}` ]...] [ :option:`-U`:samp:`{macro}` ]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-iquote`:samp:`{dir}`...]
+      [ :option:`-M` | :option:`-MM` ] [ :option:`-MG` ] [ :option:`-MF` :samp:`{filename}` ]
+      [ :option:`-MP` ] [ :option:`-MQ` :samp:`{target}`...]
+      [ :option:`-MT` :samp:`{target}`...]
+      :samp:`{infile}` [[ :option:`-o` ] :samp:`{outfile}` ]
+
+  Only the most useful options are given above; see below for a more
+  complete list of preprocessor-specific options.
+  In addition, :command:`cpp` accepts most :command:`gcc` driver options, which
+  are not listed here.  Refer to the GCC documentation for details.
+
+Options
+^^^^^^^
+
+The :command:`cpp` command expects two file names as arguments, :samp:`{infile}` and
+:samp:`{outfile}`.  The preprocessor reads :samp:`{infile}` together with any
+other files it specifies with :samp:`#include`.  All the output generated
+by the combined input files is written in :samp:`{outfile}`.
+
+Either :samp:`{infile}` or :samp:`{outfile}` may be :option:`-`, which as
+:samp:`{infile}` means to read from standard input and as :samp:`{outfile}`
+means to write to standard output.  If either file is omitted, it
+means the same as if :option:`-` had been specified for that file.
+You can also use the :option:`-o outfile` option to specify the
+output file.
+
+Unless otherwise noted, or the option ends in :samp:`=`, all options
+which take an argument may have that argument appear either immediately
+after the option, or with a space between option and argument:
+:option:`-Ifoo` and :option:`-I foo` have the same effect.
+
+.. index:: grouping options, options, grouping
+
+Many options have multi-letter names; therefore multiple single-letter
+options may *not* be grouped: :option:`-dM` is very different from
+:samp:`-d -M`.
+
+.. index:: options
+
+.. include:: ../../../doc/cppopts.rst
+
+
+.. include:: ../../../doc/cppdiropts.rst
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/line-control.rst b/gcc/doc/cpp/line-control.rst
new file mode 100644
index 00000000000..933d8a9cf1c
--- /dev/null
+++ b/gcc/doc/cpp/line-control.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: line control
+
+.. _line-control:
+
+Line Control
+------------
+
+The C preprocessor informs the C compiler of the location in your source
+code where each token came from.  Presently, this is just the file name
+and line number.  All the tokens resulting from macro expansion are
+reported as having appeared on the line of the source file where the
+outermost macro was used.  We intend to be more accurate in the future.
+
+If you write a program which generates source code, such as the
+:command:`bison` parser generator, you may want to adjust the preprocessor's
+notion of the current file name and line number by hand.  Parts of the
+output from :command:`bison` are generated from scratch, other parts come
+from a standard parser file.  The rest are copied verbatim from
+:command:`bison`'s input.  You would like compiler error messages and
+symbolic debuggers to be able to refer to ``bison`` 's input file.
+
+.. index:: #line
+
+:command:`bison` or any such program can arrange this by writing
+:samp:`#line` directives into the output file.  :samp:`#line` is a
+directive that specifies the original line number and source file name
+for subsequent input in the current preprocessor input file.
+:samp:`#line` has three variants:
+
+:samp:`#line {linenum}`
+  :samp:`{linenum}` is a non-negative decimal integer constant.  It specifies
+  the line number which should be reported for the following line of
+  input.  Subsequent lines are counted from :samp:`{linenum}`.
+
+:samp:`#line {linenum}{filename}`
+  :samp:`{linenum}` is the same as for the first form, and has the same
+  effect.  In addition, :samp:`{filename}` is a string constant.  The
+  following line and all subsequent lines are reported to come from the
+  file it specifies, until something else happens to change that.
+  :samp:`{filename}` is interpreted according to the normal rules for a string
+  constant: backslash escapes are interpreted.  This is different from
+  :samp:`#include`.
+
+:samp:`#line {anything else}`
+  :samp:`{anything else}` is checked for macro calls, which are expanded.
+  The result should match one of the above two forms.
+
+:samp:`#line` directives alter the results of the ``__FILE__`` and
+``__LINE__`` predefined macros from that point on.  See :ref:`standard-predefined-macros`.  They do not have any effect on :samp:`#include`'s
+idea of the directory containing the current file.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros.rst b/gcc/doc/cpp/macros.rst
new file mode 100644
index 00000000000..7355e0719ef
--- /dev/null
+++ b/gcc/doc/cpp/macros.rst
@@ -0,0 +1,37 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _macros:
+
+Macros
+------
+
+A :dfn:`macro` is a fragment of code which has been given a name.
+Whenever the name is used, it is replaced by the contents of the macro.
+There are two kinds of macros.  They differ mostly in what they look
+like when they are used.  :dfn:`Object-like` macros resemble data objects
+when used, :dfn:`function-like` macros resemble function calls.
+
+You may define any valid identifier as a macro, even if it is a C
+keyword.  The preprocessor does not know anything about keywords.  This
+can be useful if you wish to hide a keyword such as ``const`` from an
+older compiler that does not understand it.  However, the preprocessor
+operator ``defined`` (see :ref:`defined`) can never be defined as a
+macro, and C++'s named operators (see :ref:`c++-named-operators`) cannot be
+macros when you are compiling C++.
+
+.. toctree::
+  :maxdepth: 2
+
+  macros/object-like-macros
+  macros/function-like-macros
+  macros/macro-arguments
+  macros/stringizing
+  macros/concatenation
+  macros/variadic-macros
+  macros/predefined-macros
+  macros/undefining-and-redefining-macros
+  macros/directives-within-macro-arguments
+  macros/macro-pitfalls
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/concatenation.rst b/gcc/doc/cpp/macros/concatenation.rst
new file mode 100644
index 00000000000..2f5066ab65e
--- /dev/null
+++ b/gcc/doc/cpp/macros/concatenation.rst
@@ -0,0 +1,85 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: concatenation, token pasting, token concatenation, ## operator
+
+.. _concatenation:
+
+Concatenation
+*************
+
+It is often useful to merge two tokens into one while expanding macros.
+This is called :dfn:`token pasting` or :dfn:`token concatenation`.  The
+:samp:`##` preprocessing operator performs token pasting.  When a macro
+is expanded, the two tokens on either side of each :samp:`##` operator
+are combined into a single token, which then replaces the :samp:`##` and
+the two original tokens in the macro expansion.  Usually both will be
+identifiers, or one will be an identifier and the other a preprocessing
+number.  When pasted, they make a longer identifier.  This isn't the
+only valid case.  It is also possible to concatenate two numbers (or a
+number and a name, such as ``1.5`` and ``e3``) into a number.
+Also, multi-character operators such as ``+=`` can be formed by
+token pasting.
+
+However, two tokens that don't together form a valid token cannot be
+pasted together.  For example, you cannot concatenate ``x`` with
+``+`` in either order.  If you try, the preprocessor issues a warning
+and emits the two tokens.  Whether it puts white space between the
+tokens is undefined.  It is common to find unnecessary uses of :samp:`##`
+in complex macros.  If you get this warning, it is likely that you can
+simply remove the :samp:`##`.
+
+Both the tokens combined by :samp:`##` could come from the macro body,
+but you could just as well write them as one token in the first place.
+Token pasting is most useful when one or both of the tokens comes from a
+macro argument.  If either of the tokens next to an :samp:`##` is a
+parameter name, it is replaced by its actual argument before :samp:`##`
+executes.  As with stringizing, the actual argument is not
+macro-expanded first.  If the argument is empty, that :samp:`##` has no
+effect.
+
+Keep in mind that the C preprocessor converts comments to whitespace
+before macros are even considered.  Therefore, you cannot create a
+comment by concatenating :samp:`/` and :samp:`*`.  You can put as much
+whitespace between :samp:`##` and its operands as you like, including
+comments, and you can put comments in arguments that will be
+concatenated.  However, it is an error if :samp:`##` appears at either
+end of a macro body.
+
+Consider a C program that interprets named commands.  There probably
+needs to be a table of commands, perhaps an array of structures declared
+as follows:
+
+.. code-block:: c++
+
+  struct command
+  {
+    char *name;
+    void (*function) (void);
+  };
+
+  struct command commands[] =
+  {
+    { "quit", quit_command },
+    { "help", help_command },
+    ...
+  };
+
+It would be cleaner not to have to give each command name twice, once in
+the string constant and once in the function name.  A macro which takes the
+name of a command as an argument can make this unnecessary.  The string
+constant can be created with stringizing, and the function name by
+concatenating the argument with :samp:`_command`.  Here is how it is done:
+
+.. code-block:: c++
+
+  #define COMMAND(NAME)  { #NAME, NAME ## _command }
+
+  struct command commands[] =
+  {
+    COMMAND (quit),
+    COMMAND (help),
+    ...
+  };
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/directives-within-macro-arguments.rst b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
new file mode 100644
index 00000000000..2e7e82563e9
--- /dev/null
+++ b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: macro arguments and directives
+
+.. _directives-within-macro-arguments:
+
+Directives Within Macro Arguments
+*********************************
+
+Occasionally it is convenient to use preprocessor directives within
+the arguments of a macro.  The C and C++ standards declare that
+behavior in these cases is undefined.  GNU CPP
+processes arbitrary directives within macro arguments in
+exactly the same way as it would have processed the directive were the
+function-like macro invocation not present.
+
+If, within a macro invocation, that macro is redefined, then the new
+definition takes effect in time for argument pre-expansion, but the
+original definition is still used for argument replacement.  Here is a
+pathological example:
+
+.. code-block:: c++
+
+  #define f(x) x x
+  f (1
+  #undef f
+  #define f 2
+  f)
+
+which expands to
+
+.. code-block:: c++
+
+  1 2 1 2
+
+with the semantics described above.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/function-like-macros.rst b/gcc/doc/cpp/macros/function-like-macros.rst
new file mode 100644
index 00000000000..16ba2cf1a1a
--- /dev/null
+++ b/gcc/doc/cpp/macros/function-like-macros.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: function-like macros
+
+.. _function-like-macros:
+
+Function-like Macros
+********************
+
+You can also define macros whose use looks like a function call.  These
+are called :dfn:`function-like macros`.  To define a function-like macro,
+you use the same :samp:`#define` directive, but you put a pair of
+parentheses immediately after the macro name.  For example,
+
+.. code-block::
+
+  #define lang_init()  c_init()
+  lang_init()
+       → c_init()
+
+A function-like macro is only expanded if its name appears with a pair
+of parentheses after it.  If you write just the name, it is left alone.
+This can be useful when you have a function and a macro of the same
+name, and you wish to use the function sometimes.
+
+.. code-block::
+
+  extern void foo(void);
+  #define foo() /* optimized inline version */
+  ...
+    foo();
+    funcptr = foo;
+
+Here the call to ``foo()`` will use the macro, but the function
+pointer will get the address of the real function.  If the macro were to
+be expanded, it would cause a syntax error.
+
+If you put spaces between the macro name and the parentheses in the
+macro definition, that does not define a function-like macro, it defines
+an object-like macro whose expansion happens to begin with a pair of
+parentheses.
+
+.. code-block::
+
+  #define lang_init ()    c_init()
+  lang_init()
+       → () c_init()()
+
+The first two pairs of parentheses in this expansion come from the
+macro.  The third is the pair that was originally after the macro
+invocation.  Since ``lang_init`` is an object-like macro, it does not
+consume those parentheses.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-arguments.rst b/gcc/doc/cpp/macros/macro-arguments.rst
new file mode 100644
index 00000000000..06911523e7f
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-arguments.rst
@@ -0,0 +1,112 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: arguments, macros with arguments, arguments in macro definitions
+
+.. _macro-arguments:
+
+Macro Arguments
+***************
+
+Function-like macros can take :dfn:`arguments`, just like true functions.
+To define a macro that uses arguments, you insert :dfn:`parameters`
+between the pair of parentheses in the macro definition that make the
+macro function-like.  The parameters must be valid C identifiers,
+separated by commas and optionally whitespace.
+
+To invoke a macro that takes arguments, you write the name of the macro
+followed by a list of :dfn:`actual arguments` in parentheses, separated
+by commas.  The invocation of the macro need not be restricted to a
+single logical line---it can cross as many lines in the source file as
+you wish.  The number of arguments you give must match the number of
+parameters in the macro definition.  When the macro is expanded, each
+use of a parameter in its body is replaced by the tokens of the
+corresponding argument.  (You need not use all of the parameters in the
+macro body.)
+
+As an example, here is a macro that computes the minimum of two numeric
+values, as it is defined in many C programs, and some uses.
+
+.. code-block::
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+    x = min(a, b);          →  x = ((a) < (b) ? (a) : (b));
+    y = min(1, 2);          →  y = ((1) < (2) ? (1) : (2));
+    z = min(a + 28, *p);    →  z = ((a + 28) < (*p) ? (a + 28) : (*p));
+
+(In this small example you can already see several of the dangers of
+macro arguments.  See :ref:`macro-pitfalls`, for detailed explanations.)
+
+Leading and trailing whitespace in each argument is dropped, and all
+whitespace between the tokens of an argument is reduced to a single
+space.  Parentheses within each argument must balance; a comma within
+such parentheses does not end the argument.  However, there is no
+requirement for square brackets or braces to balance, and they do not
+prevent a comma from separating arguments.  Thus,
+
+.. code-block:: c++
+
+  macro (array[x = y, x + 1])
+
+passes two arguments to ``macro`` : ``array[x = y`` and ``x +
+1]``.  If you want to supply ``array[x = y, x + 1]`` as an argument,
+you can write it as ``array[(x = y, x + 1)]``, which is equivalent C
+code.
+
+All arguments to a macro are completely macro-expanded before they are
+substituted into the macro body.  After substitution, the complete text
+is scanned again for macros to expand, including the arguments.  This rule
+may seem strange, but it is carefully designed so you need not worry
+about whether any function call is actually a macro invocation.  You can
+run into trouble if you try to be too clever, though.  See :ref:`argument-prescan`, for detailed discussion.
+
+For example, ``min (min (a, b), c)`` is first expanded to
+
+.. code-block:: c++
+
+    min (((a) < (b) ? (a) : (b)), (c))
+
+and then to
+
+.. code-block:: c++
+
+  ((((a) < (b) ? (a) : (b))) < (c)
+   ? (((a) < (b) ? (a) : (b)))
+   : (c))
+
+(Line breaks shown here for clarity would not actually be generated.)
+
+.. index:: empty macro arguments
+
+You can leave macro arguments empty; this is not an error to the
+preprocessor (but many macros will then expand to invalid code).
+You cannot leave out arguments entirely; if a macro takes two arguments,
+there must be exactly one comma at the top level of its argument list.
+Here are some silly examples using ``min`` :
+
+.. code-block::
+
+  min(, b)        → ((   ) < (b) ? (   ) : (b))
+  min(a, )        → ((a  ) < ( ) ? (a  ) : ( ))
+  min(,)          → ((   ) < ( ) ? (   ) : ( ))
+  min((,),)       → (((,)) < ( ) ? ((,)) : ( ))
+
+  min()      error macro "min" requires 2 arguments, but only 1 given
+  min(,,)    error macro "min" passed 3 arguments, but takes just 2
+
+Whitespace is not a preprocessing token, so if a macro ``foo`` takes
+one argument, ``foo ()`` and ``foo ( )`` both supply it an
+empty argument.  Previous GNU preprocessor implementations and
+documentation were incorrect on this point, insisting that a
+function-like macro that takes a single argument be passed a space if an
+empty argument was required.
+
+Macro parameters appearing inside string literals are not replaced by
+their corresponding actual arguments.
+
+.. code-block::
+
+  #define foo(x) x, "x"
+  foo(bar)        → bar, "x"
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-pitfalls.rst b/gcc/doc/cpp/macros/macro-pitfalls.rst
new file mode 100644
index 00000000000..0be22954a76
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-pitfalls.rst
@@ -0,0 +1,449 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: problems with macros, pitfalls of macros
+
+.. _macro-pitfalls:
+
+Macro Pitfalls
+**************
+
+In this section we describe some special rules that apply to macros and
+macro expansion, and point out certain cases in which the rules have
+counter-intuitive consequences that you must watch out for.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. _misnesting:
+
+Misnesting
+^^^^^^^^^^
+
+When a macro is called with arguments, the arguments are substituted
+into the macro body and the result is checked, together with the rest of
+the input file, for more macro calls.  It is possible to piece together
+a macro call coming partially from the macro body and partially from the
+arguments.  For example,
+
+.. code-block::
+
+  #define twice(x) (2*(x))
+  #define call_with_1(x) x(1)
+  call_with_1 (twice)
+       → twice(1)
+       → (2*(1))
+
+Macro definitions do not have to have balanced parentheses.  By writing
+an unbalanced open parenthesis in a macro body, it is possible to create
+a macro call that begins inside the macro body but ends outside of it.
+For example,
+
+.. code-block::
+
+  #define strange(file) fprintf (file, "%s %d",
+  ...
+  strange(stderr) p, 35)
+       → fprintf (stderr, "%s %d", p, 35)
+
+The ability to piece together a macro call can be useful, but the use of
+unbalanced open parentheses in a macro body is just confusing, and
+should be avoided.
+
+.. index:: parentheses in macro bodies
+
+.. _operator-precedence-problems:
+
+Operator Precedence Problems
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You may have noticed that in most of the macro definition examples shown
+above, each occurrence of a macro argument name had parentheses around
+it.  In addition, another pair of parentheses usually surround the
+entire macro definition.  Here is why it is best to write macros that
+way.
+
+Suppose you define a macro as follows,
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (x + y - 1) / y
+
+whose purpose is to divide, rounding up.  (One use for this operation is
+to compute how many ``int`` objects are needed to hold a certain
+number of ``char`` objects.)  Then suppose it is used as follows:
+
+.. code-block::
+
+  a = ceil_div (b & c, sizeof (int));
+       → a = (b & c + sizeof (int) - 1) / sizeof (int);
+
+This does not do what is intended.  The operator-precedence rules of
+C make it equivalent to this:
+
+.. code-block:: c++
+
+  a = (b & (c + sizeof (int) - 1)) / sizeof (int);
+
+What we want is this:
+
+.. code-block:: c++
+
+  a = ((b & c) + sizeof (int) - 1)) / sizeof (int);
+
+Defining the macro as
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) ((x) + (y) - 1) / (y)
+
+provides the desired result.
+
+Unintended grouping can result in another way.  Consider ``sizeof
+ceil_div(1, 2)``.  That has the appearance of a C expression that would
+compute the size of the type of ``ceil_div (1, 2)``, but in fact it
+means something very different.  Here is what it expands to:
+
+.. code-block:: c++
+
+  sizeof ((1) + (2) - 1) / (2)
+
+This would take the size of an integer and divide it by two.  The
+precedence rules have put the division outside the ``sizeof`` when it
+was intended to be inside.
+
+Parentheses around the entire macro definition prevent such problems.
+Here, then, is the recommended way to define ``ceil_div`` :
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (((x) + (y) - 1) / (y))
+
+.. index:: semicolons (after macro calls)
+
+.. _swallowing-the-semicolon:
+
+Swallowing the Semicolon
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+Often it is desirable to define a macro that expands into a compound
+statement.  Consider, for example, the following macro, that advances a
+pointer (the argument ``p`` says where to find it) across whitespace
+characters:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)  \
+  { char *lim = (limit);         \
+    while (p < lim) {            \
+      if (*p++ != ' ') {         \
+        p--; break; }}}
+
+Here backslash-newline is used to split the macro definition, which must
+be a single logical line, so that it resembles the way such code would
+be laid out if not part of a macro definition.
+
+A call to this macro might be ``SKIP_SPACES (p, lim)``.  Strictly
+speaking, the call expands to a compound statement, which is a complete
+statement with no need for a semicolon to end it.  However, since it
+looks like a function call, it minimizes confusion if you can use it
+like a function call, writing a semicolon afterward, as in
+``SKIP_SPACES (p, lim);``
+
+This can cause trouble before ``else`` statements, because the
+semicolon is actually a null statement.  Suppose you write
+
+.. code-block:: c++
+
+  if (*p != 0)
+    SKIP_SPACES (p, lim);
+  else ...
+
+The presence of two statements---the compound statement and a null
+statement---in between the ``if`` condition and the ``else``
+makes invalid C code.
+
+The definition of the macro ``SKIP_SPACES`` can be altered to solve
+this problem, using a ``do ... while`` statement.  Here is how:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)     \
+  do { char *lim = (limit);         \
+       while (p < lim) {            \
+         if (*p++ != ' ') {         \
+           p--; break; }}}          \
+  while (0)
+
+Now ``SKIP_SPACES (p, lim);`` expands into
+
+.. code-block:: c++
+
+  do {...} while (0);
+
+which is one statement.  The loop executes exactly once; most compilers
+generate no extra code for it.
+
+.. index:: side effects (in macro arguments), unsafe macros
+
+.. _duplication-of-side-effects:
+
+Duplication of Side Effects
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Many C programs define a macro ``min``, for 'minimum', like this:
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+
+When you use this macro with an argument containing a side effect,
+as shown here,
+
+.. code-block:: c++
+
+  next = min (x + y, foo (z));
+
+it expands as follows:
+
+.. code-block:: c++
+
+  next = ((x + y) < (foo (z)) ? (x + y) : (foo (z)));
+
+where ``x + y`` has been substituted for ``X`` and ``foo (z)``
+for ``Y``.
+
+The function ``foo`` is used only once in the statement as it appears
+in the program, but the expression ``foo (z)`` has been substituted
+twice into the macro expansion.  As a result, ``foo`` might be called
+two times when the statement is executed.  If it has side effects or if
+it takes a long time to compute, the results might not be what you
+intended.  We say that ``min`` is an :dfn:`unsafe` macro.
+
+The best solution to this problem is to define ``min`` in a way that
+computes the value of ``foo (z)`` only once.  The C language offers
+no standard way to do this, but it can be done with GNU extensions as
+follows:
+
+.. code-block:: c++
+
+  #define min(X, Y)                \
+  ({ typeof (X) x_ = (X);          \
+     typeof (Y) y_ = (Y);          \
+     (x_ < y_) ? x_ : y_; })
+
+The :samp:`({ ... })` notation produces a compound statement that
+acts as an expression.  Its value is the value of its last statement.
+This permits us to define local variables and assign each argument to
+one.  The local variables have underscores after their names to reduce
+the risk of conflict with an identifier of wider scope (it is impossible
+to avoid this entirely).  Now each argument is evaluated exactly once.
+
+If you do not wish to use GNU C extensions, the only solution is to be
+careful when *using* the macro ``min``.  For example, you can
+calculate the value of ``foo (z)``, save it in a variable, and use
+that variable in ``min`` :
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+  ...
+  {
+    int tem = foo (z);
+    next = min (x + y, tem);
+  }
+
+(where we assume that ``foo`` returns type ``int``).
+
+.. index:: self-reference
+
+.. _self-referential-macros:
+
+Self-Referential Macros
+^^^^^^^^^^^^^^^^^^^^^^^
+
+A :dfn:`self-referential` macro is one whose name appears in its
+definition.  Recall that all macro definitions are rescanned for more
+macros to replace.  If the self-reference were considered a use of the
+macro, it would produce an infinitely large expansion.  To prevent this,
+the self-reference is not considered a macro call.  It is passed into
+the preprocessor output unchanged.  Consider an example:
+
+.. code-block:: c++
+
+  #define foo (4 + foo)
+
+where ``foo`` is also a variable in your program.
+
+Following the ordinary rules, each reference to ``foo`` will expand
+into ``(4 + foo)`` ; then this will be rescanned and will expand into
+``(4 + (4 + foo))`` ; and so on until the computer runs out of memory.
+
+The self-reference rule cuts this process short after one step, at
+``(4 + foo)``.  Therefore, this macro definition has the possibly
+useful effect of causing the program to add 4 to the value of ``foo``
+wherever ``foo`` is referred to.
+
+In most cases, it is a bad idea to take advantage of this feature.  A
+person reading the program who sees that ``foo`` is a variable will
+not expect that it is a macro as well.  The reader will come across the
+identifier ``foo`` in the program and think its value should be that
+of the variable ``foo``, whereas in fact the value is four greater.
+
+One common, useful use of self-reference is to create a macro which
+expands to itself.  If you write
+
+.. code-block:: c++
+
+  #define EPERM EPERM
+
+then the macro ``EPERM`` expands to ``EPERM``.  Effectively, it is
+left alone by the preprocessor whenever it's used in running text.  You
+can tell that it's a macro with :samp:`#ifdef`.  You might do this if you
+want to define numeric constants with an ``enum``, but have
+:samp:`#ifdef` be true for each constant.
+
+If a macro ``x`` expands to use a macro ``y``, and the expansion of
+``y`` refers to the macro ``x``, that is an :dfn:`indirect
+self-reference` of ``x``.  ``x`` is not expanded in this case
+either.  Thus, if we have
+
+.. code-block:: c++
+
+  #define x (4 + y)
+  #define y (2 * x)
+
+then ``x`` and ``y`` expand as follows:
+
+.. code-block::
+
+  x    → (4 + y)
+       → (4 + (2 * x))
+
+  y    → (2 * x)
+       → (2 * (4 + y))
+
+Each macro is expanded when it appears in the definition of the other
+macro, but not when it indirectly appears in its own definition.
+
+.. index:: expansion of arguments, macro argument expansion, prescan of macro arguments
+
+.. _argument-prescan:
+
+Argument Prescan
+^^^^^^^^^^^^^^^^
+
+Macro arguments are completely macro-expanded before they are
+substituted into a macro body, unless they are stringized or pasted
+with other tokens.  After substitution, the entire macro body, including
+the substituted arguments, is scanned again for macros to be expanded.
+The result is that the arguments are scanned *twice* to expand
+macro calls in them.
+
+Most of the time, this has no effect.  If the argument contained any
+macro calls, they are expanded during the first scan.  The result
+therefore contains no macro calls, so the second scan does not change
+it.  If the argument were substituted as given, with no prescan, the
+single remaining scan would find the same macro calls and produce the
+same results.
+
+You might expect the double scan to change the results when a
+self-referential macro is used in an argument of another macro
+(see :ref:`self-referential-macros`): the self-referential macro would be
+expanded once in the first scan, and a second time in the second scan.
+However, this is not what happens.  The self-references that do not
+expand in the first scan are marked so that they will not expand in the
+second scan either.
+
+You might wonder, 'Why mention the prescan, if it makes no difference?
+And why not skip it and make the preprocessor faster?'  The answer is
+that the prescan does make a difference in three special cases:
+
+* Nested calls to a macro.
+
+  We say that :dfn:`nested` calls to a macro occur when a macro's argument
+  contains a call to that very macro.  For example, if ``f`` is a macro
+  that expects one argument, ``f (f (1))`` is a nested pair of calls to
+  ``f``.  The desired expansion is made by expanding ``f (1)`` and
+  substituting that into the definition of ``f``.  The prescan causes
+  the expected result to happen.  Without the prescan, ``f (1)`` itself
+  would be substituted as an argument, and the inner use of ``f`` would
+  appear during the main scan as an indirect self-reference and would not
+  be expanded.
+
+* Macros that call other macros that stringize or concatenate.
+
+  If an argument is stringized or concatenated, the prescan does not
+  occur.  If you *want* to expand a macro, then stringize or
+  concatenate its expansion, you can do that by causing one macro to call
+  another macro that does the stringizing or concatenation.  For
+  instance, if you have
+
+  .. code-block:: c++
+
+    #define AFTERX(x) X_ ## x
+    #define XAFTERX(x) AFTERX(x)
+    #define TABLESIZE 1024
+    #define BUFSIZE TABLESIZE
+
+  then ``AFTERX(BUFSIZE)`` expands to ``X_BUFSIZE``, and
+  ``XAFTERX(BUFSIZE)`` expands to ``X_1024``.  (Not to
+  ``X_TABLESIZE``.  Prescan always does a complete expansion.)
+
+* Macros used in arguments, whose expansions contain unshielded commas.
+
+  This can cause a macro expanded on the second scan to be called with the
+  wrong number of arguments.  Here is an example:
+
+  .. code-block:: c++
+
+    #define foo  a,b
+    #define bar(x) lose(x)
+    #define lose(x) (1 + (x))
+
+  We would like ``bar(foo)`` to turn into ``(1 + (foo))``, which
+  would then turn into ``(1 + (a,b))``.  Instead, ``bar(foo)``
+  expands into ``lose(a,b)``, and you get an error because ``lose``
+  requires a single argument.  In this case, the problem is easily solved
+  by the same parentheses that ought to be used to prevent misnesting of
+  arithmetic operations:
+
+  .. code-block::
+
+    #define foo (a,b)
+    or#define bar(x) lose((x))
+
+  The extra pair of parentheses prevents the comma in ``foo`` 's
+  definition from being interpreted as an argument separator.
+
+.. index:: newlines in macro arguments
+
+.. _newlines-in-arguments:
+
+Newlines in Arguments
+^^^^^^^^^^^^^^^^^^^^^
+
+The invocation of a function-like macro can extend over many logical
+lines.  However, in the present implementation, the entire expansion
+comes out on one line.  Thus line numbers emitted by the compiler or
+debugger refer to the line the invocation started on, which might be
+different to the line containing the argument causing the problem.
+
+Here is an example illustrating this:
+
+.. code-block:: c++
+
+  #define ignore_second_arg(a,b,c) a; c
+
+  ignore_second_arg (foo (),
+                     ignored (),
+                     syntax error);
+
+The syntax error triggered by the tokens ``syntax error`` results in
+an error message citing line three---the line of ignore_second_arg---
+even though the problematic code comes from line five.
+
+We consider this a bug, and intend to fix it in the near future.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/object-like-macros.rst b/gcc/doc/cpp/macros/object-like-macros.rst
new file mode 100644
index 00000000000..c5e6e4cd466
--- /dev/null
+++ b/gcc/doc/cpp/macros/object-like-macros.rst
@@ -0,0 +1,126 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: object-like macro, symbolic constants, manifest constants
+
+.. _object-like-macros:
+
+Object-like Macros
+******************
+
+An :dfn:`object-like macro` is a simple identifier which will be replaced
+by a code fragment.  It is called object-like because it looks like a
+data object in code that uses it.  They are most commonly used to give
+symbolic names to numeric constants.
+
+.. index:: #define
+
+You create macros with the :samp:`#define` directive.  :samp:`#define` is
+followed by the name of the macro and then the token sequence it should
+be an abbreviation for, which is variously referred to as the macro's
+:dfn:`body`, :dfn:`expansion` or :dfn:`replacement list`.  For example,
+
+.. code-block:: c++
+
+  #define BUFFER_SIZE 1024
+
+defines a macro named ``BUFFER_SIZE`` as an abbreviation for the
+token ``1024``.  If somewhere after this :samp:`#define` directive
+there comes a C statement of the form
+
+.. code-block:: c++
+
+  foo = (char *) malloc (BUFFER_SIZE);
+
+then the C preprocessor will recognize and :dfn:`expand` the macro
+``BUFFER_SIZE``.  The C compiler will see the same tokens as it would
+if you had written
+
+.. code-block:: c++
+
+  foo = (char *) malloc (1024);
+
+By convention, macro names are written in uppercase.  Programs are
+easier to read when it is possible to tell at a glance which names are
+macros.
+
+The macro's body ends at the end of the :samp:`#define` line.  You may
+continue the definition onto multiple lines, if necessary, using
+backslash-newline.  When the macro is expanded, however, it will all
+come out on one line.  For example,
+
+.. code-block::
+
+  #define NUMBERS 1, \
+                  2, \
+                  3
+  int x[] = { NUMBERS };
+       → int x[] = { 1, 2, 3 };
+
+The most common visible consequence of this is surprising line numbers
+in error messages.
+
+There is no restriction on what can go in a macro body provided it
+decomposes into valid preprocessing tokens.  Parentheses need not
+balance, and the body need not resemble valid C code.  (If it does not,
+you may get error messages from the C compiler when you use the macro.)
+
+The C preprocessor scans your program sequentially.  Macro definitions
+take effect at the place you write them.  Therefore, the following input
+to the C preprocessor
+
+.. code-block:: c++
+
+  foo = X;
+  #define X 4
+  bar = X;
+
+produces
+
+.. code-block:: c++
+
+  foo = X;
+  bar = 4;
+
+When the preprocessor expands a macro name, the macro's expansion
+replaces the macro invocation, then the expansion is examined for more
+macros to expand.  For example,
+
+.. code-block::
+
+  #define TABLESIZE BUFSIZE
+  #define BUFSIZE 1024
+  TABLESIZE
+       → BUFSIZE
+       → 1024
+
+``TABLESIZE`` is expanded first to produce ``BUFSIZE``, then that
+macro is expanded to produce the final result, ``1024``.
+
+Notice that ``BUFSIZE`` was not defined when ``TABLESIZE`` was
+defined.  The :samp:`#define` for ``TABLESIZE`` uses exactly the
+expansion you specify---in this case, ``BUFSIZE`` ---and does not
+check to see whether it too contains macro names.  Only when you
+*use* ``TABLESIZE`` is the result of its expansion scanned for
+more macro names.
+
+This makes a difference if you change the definition of ``BUFSIZE``
+at some point in the source file.  ``TABLESIZE``, defined as shown,
+will always expand using the definition of ``BUFSIZE`` that is
+currently in effect:
+
+.. code-block:: c++
+
+  #define BUFSIZE 1020
+  #define TABLESIZE BUFSIZE
+  #undef BUFSIZE
+  #define BUFSIZE 37
+
+Now ``TABLESIZE`` expands (in two stages) to ``37``.
+
+If the expansion of a macro contains its own name, either directly or
+via intermediate macros, it is not expanded again when the expansion is
+examined for more macros.  This prevents infinite recursion.
+See :ref:`self-referential-macros`, for the precise details.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/predefined-macros.rst b/gcc/doc/cpp/macros/predefined-macros.rst
new file mode 100644
index 00000000000..8af566e0dc3
--- /dev/null
+++ b/gcc/doc/cpp/macros/predefined-macros.rst
@@ -0,0 +1,874 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: predefined macros
+
+.. _predefined-macros:
+
+Predefined Macros
+*****************
+
+Several object-like macros are predefined; you use them without
+supplying their definitions.  They fall into three classes: standard,
+common, and system-specific.
+
+In C++, there is a fourth category, the named operators.  They act like
+predefined macros, but you cannot undefine them.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: standard predefined macros.
+
+.. _standard-predefined-macros:
+
+Standard Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The standard predefined macros are specified by the relevant
+language standards, so they are available with all compilers that
+implement those standards.  Older compilers may not provide all of
+them.  Their names all start with double underscores.
+
+.. c:macro:: __FILE__
+
+  This macro expands to the name of the current input file, in the form of
+  a C string constant.  This is the path by which the preprocessor opened
+  the file, not the short name specified in :samp:`#include` or as the
+  input file name argument.  For example,
+  ``"/usr/local/include/myheader.h"`` is a possible expansion of this
+  macro.
+
+.. c:macro:: __LINE__
+
+  This macro expands to the current input line number, in the form of a
+  decimal integer constant.  While we call it a predefined macro, it's
+  a pretty strange macro, since its 'definition' changes with each
+  new line of source code.
+
+  ``__FILE__`` and ``__LINE__`` are useful in generating an error
+  message to report an inconsistency detected by the program; the message
+  can state the source line at which the inconsistency was detected.  For
+  example,
+
+.. code-block:: c++
+
+  fprintf (stderr, "Internal error: "
+                   "negative string length "
+                   "%d at %s, line %d.",
+           length, __FILE__, __LINE__);
+
+An :samp:`#include` directive changes the expansions of ``__FILE__``
+and ``__LINE__`` to correspond to the included file.  At the end of
+that file, when processing resumes on the input file that contained
+the :samp:`#include` directive, the expansions of ``__FILE__`` and
+``__LINE__`` revert to the values they had before the
+:samp:`#include` (but ``__LINE__`` is then incremented by one as
+processing moves to the line after the :samp:`#include`).
+
+A :samp:`#line` directive changes ``__LINE__``, and may change
+``__FILE__`` as well.  See :ref:`line-control`.
+
+C99 introduced ``__func__``, and GCC has provided ``__FUNCTION__``
+for a long time.  Both of these are strings containing the name of the
+current function (there are slight semantic differences; see the GCC
+manual).  Neither of them is a macro; the preprocessor does not know the
+name of the current function.  They tend to be useful in conjunction
+with ``__FILE__`` and ``__LINE__``, though.
+
+.. c:macro:: __DATE__
+
+  This macro expands to a string constant that describes the date on which
+  the preprocessor is being run.  The string constant contains eleven
+  characters and looks like ``"Feb 12 1996"``.  If the day of the
+  month is less than 10, it is padded with a space on the left.
+
+  If GCC cannot determine the current date, it will emit a warning message
+  (once per compilation) and ``__DATE__`` will expand to
+  ``"??? ?? ????"``.
+
+.. c:macro:: __TIME__
+
+  This macro expands to a string constant that describes the time at
+  which the preprocessor is being run.  The string constant contains
+  eight characters and looks like ``"23:59:01"``.
+
+  If GCC cannot determine the current time, it will emit a warning message
+  (once per compilation) and ``__TIME__`` will expand to
+  ``"??:??:??"``.
+
+.. c:macro:: __STDC__
+
+  In normal operation, this macro expands to the constant 1, to signify
+  that this compiler conforms to ISO Standard C.  If GNU CPP is used with
+  a compiler other than GCC, this is not necessarily true; however, the
+  preprocessor always conforms to the standard unless the
+  :option:`-traditional-cpp` option is used.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is used.
+
+  On some hosts, the system compiler uses a different convention, where
+  ``__STDC__`` is normally 0, but is 1 if the user specifies strict
+  conformance to the C Standard.  CPP follows the host convention when
+  processing system header files, but when processing user files
+  ``__STDC__`` is always 1.  This has been reported to cause problems;
+  for instance, some versions of Solaris provide X Windows headers that
+  expect ``__STDC__`` to be either undefined or 1.  See :ref:`invocation`.
+
+.. c:macro:: __STDC_VERSION__
+
+  This macro expands to the C Standard's version number, a long integer
+  constant of the form ``yyyymmL`` where :samp:`{yyyy}` and
+  :samp:`{mm}` are the year and month of the Standard version.  This signifies
+  which version of the C Standard the compiler conforms to.  Like
+  ``__STDC__``, this is not necessarily accurate for the entire
+  implementation, unless GNU CPP is being used with GCC.
+
+  The value ``199409L`` signifies the 1989 C standard as amended in
+  1994, which is the current default; the value ``199901L`` signifies
+  the 1999 revision of the C standard; the value ``201112L``
+  signifies the 2011 revision of the C standard; the value
+  ``201710L`` signifies the 2017 revision of the C standard (which is
+  otherwise identical to the 2011 version apart from correction of
+  defects).  An unspecified value larger than ``201710L`` is used for
+  the experimental :option:`-std=c2x` and :option:`-std=gnu2x` modes.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is
+  used, nor when compiling C++ or Objective-C.
+
+.. c:macro:: __STDC_HOSTED__
+
+  This macro is defined, with value 1, if the compiler's target is a
+  :dfn:`hosted environment`.  A hosted environment has the complete
+  facilities of the standard C library available.
+
+.. c:macro:: __cplusplus
+
+  This macro is defined when the C++ compiler is in use.  You can use
+  ``__cplusplus`` to test whether a header is compiled by a C compiler
+  or a C++ compiler.  This macro is similar to ``__STDC_VERSION__``, in
+  that it expands to a version number.  Depending on the language standard
+  selected, the value of the macro is
+  ``199711L`` for the 1998 C++ standard,
+  ``201103L`` for the 2011 C++ standard,
+  ``201402L`` for the 2014 C++ standard,
+  ``201703L`` for the 2017 C++ standard,
+  ``202002L`` for the 2020 C++ standard,
+  or an unspecified value strictly larger than ``202002L`` for the
+  experimental languages enabled by :option:`-std=c++23` and
+  :option:`-std=gnu++23`.
+
+.. c:macro:: __OBJC__
+
+  This macro is defined, with value 1, when the Objective-C compiler is in
+  use.  You can use ``__OBJC__`` to test whether a header is compiled
+  by a C compiler or an Objective-C compiler.
+
+.. c:macro:: __ASSEMBLER__
+
+  This macro is defined with value 1 when preprocessing assembly
+  language.
+
+.. index:: common predefined macros
+
+.. _common-predefined-macros:
+
+Common Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+The common predefined macros are GNU C extensions.  They are available
+with the same meanings regardless of the machine or operating system on
+which you are using GNU C or GNU Fortran.  Their names all start with
+double underscores.
+
+.. c:macro:: __COUNTER__
+
+  This macro expands to sequential integral values starting from 0.  In
+  conjunction with the ``##`` operator, this provides a convenient means to
+  generate unique identifiers.  Care must be taken to ensure that
+  ``__COUNTER__`` is not expanded prior to inclusion of precompiled headers
+  which use it.  Otherwise, the precompiled headers will not be used.
+
+.. c:macro:: __GFORTRAN__
+
+  The GNU Fortran compiler defines this.
+
+.. c:macro:: __GNUC__
+             __GNUC_MINOR__
+             __GNUC_PATCHLEVEL__
+
+  These macros are defined by all GNU compilers that use the C
+  preprocessor: C, C++, Objective-C and Fortran.  Their values are the major
+  version, minor version, and patch level of the compiler, as integer
+  constants.  For example, GCC version :samp:`{x}`. :samp:`{y}`. :samp:`{z}`
+  defines ``__GNUC__`` to :samp:`{x}`, ``__GNUC_MINOR__`` to :samp:`{y}`,
+  and ``__GNUC_PATCHLEVEL__`` to :samp:`{z}`.  These
+  macros are also defined if you invoke the preprocessor directly.
+
+  If all you need to know is whether or not your program is being compiled
+  by GCC, or a non-GCC compiler that claims to accept the GNU C dialects,
+  you can simply test ``__GNUC__``.  If you need to write code
+  which depends on a specific version, you must be more careful.  Each
+  time the minor version is increased, the patch level is reset to zero;
+  each time the major version is increased, the
+  minor version and patch level are reset.  If you wish to use the
+  predefined macros directly in the conditional, you will need to write it
+  like this:
+
+  .. code-block:: c++
+
+    /* Test for GCC > 3.2.0 */
+    #if __GNUC__ > 3 || \
+        (__GNUC__ == 3 && (__GNUC_MINOR__ > 2 || \
+                           (__GNUC_MINOR__ == 2 && \
+                            __GNUC_PATCHLEVEL__ > 0))
+
+  Another approach is to use the predefined macros to
+  calculate a single number, then compare that against a threshold:
+
+  .. code-block:: c++
+
+    #define GCC_VERSION (__GNUC__ * 10000 \
+                         + __GNUC_MINOR__ * 100 \
+                         + __GNUC_PATCHLEVEL__)
+    ...
+    /* Test for GCC > 3.2.0 */
+    #if GCC_VERSION > 30200
+
+  Many people find this form easier to understand.
+
+.. c:macro:: __GNUG__
+
+  The GNU C++ compiler defines this.  Testing it is equivalent to
+  testing ``(__GNUC__ && __cplusplus)``.
+
+.. c:macro:: __STRICT_ANSI__
+
+  GCC defines this macro if and only if the :option:`-ansi` switch, or a
+  :option:`-std` switch specifying strict conformance to some version of ISO C
+  or ISO C++, was specified when GCC was invoked.  It is defined to :samp:`1`.
+  This macro exists primarily to direct GNU libc's header files to use only
+  definitions found in standard C.
+
+.. c:macro:: __BASE_FILE__
+
+  This macro expands to the name of the main input file, in the form
+  of a C string constant.  This is the source file that was specified
+  on the command line of the preprocessor or C compiler.
+
+.. c:macro:: __FILE_NAME__
+
+  This macro expands to the basename of the current input file, in the
+  form of a C string constant.  This is the last path component by which
+  the preprocessor opened the file.  For example, processing
+  ``"/usr/local/include/myheader.h"`` would set this
+  macro to ``"myheader.h"``.
+
+.. c:macro:: __INCLUDE_LEVEL__
+
+  This macro expands to a decimal integer constant that represents the
+  depth of nesting in include files.  The value of this macro is
+  incremented on every :samp:`#include` directive and decremented at the
+  end of every included file.  It starts out at 0, its value within the
+  base file specified on the command line.
+
+.. c:macro:: __ELF__
+
+  This macro is defined if the target uses the ELF object format.
+
+.. c:macro:: __VERSION__
+
+  This macro expands to a string constant which describes the version of
+  the compiler in use.  You should not rely on its contents having any
+  particular form, but it can be counted on to contain at least the
+  release number.
+
+.. c:macro:: __OPTIMIZE__
+             __OPTIMIZE_SIZE__
+             __NO_INLINE__
+
+  These macros describe the compilation mode.  ``__OPTIMIZE__`` is
+  defined in all optimizing compilations.  ``__OPTIMIZE_SIZE__`` is
+  defined if the compiler is optimizing for size, not speed.
+  ``__NO_INLINE__`` is defined if no functions will be inlined into
+  their callers (when not optimizing, or when inlining has been
+  specifically disabled by :option:`-fno-inline`).
+
+  These macros cause certain GNU header files to provide optimized
+  definitions, using macros or inline functions, of system library
+  functions.  You should not use these macros in any way unless you make
+  sure that programs will execute with the same effect whether or not they
+  are defined.  If they are defined, their value is 1.
+
+.. c:macro:: __GNUC_GNU_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled in GCC's traditional gnu90 mode.  Object files will contain
+  externally visible definitions of all functions declared ``inline``
+  without ``extern`` or ``static``.  They will not contain any
+  definitions of any functions declared ``extern inline``.
+
+.. c:macro:: __GNUC_STDC_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled according to the ISO C99 or later standards.  Object files will contain
+  externally visible definitions of all functions declared ``extern
+  inline``.  They will not contain definitions of any functions declared
+  ``inline`` without ``extern``.
+
+  If this macro is defined, GCC supports the ``gnu_inline`` function
+  attribute as a way to always get the gnu90 behavior.
+
+.. c:macro:: __CHAR_UNSIGNED__
+
+  GCC defines this macro if and only if the data type ``char`` is
+  unsigned on the target machine.  It exists to cause the standard header
+  file :samp:`limits.h` to work correctly.  You should not use this macro
+  yourself; instead, refer to the standard macros defined in :samp:`limits.h`.
+
+.. c:macro:: __WCHAR_UNSIGNED__
+
+  Like ``__CHAR_UNSIGNED__``, this macro is defined if and only if the
+  data type ``wchar_t`` is unsigned and the front-end is in C++ mode.
+
+.. c:macro:: __REGISTER_PREFIX__
+
+  This macro expands to a single token (not a string constant) which is
+  the prefix applied to CPU register names in assembly language for this
+  target.  You can use it to write assembly that is usable in multiple
+  environments.  For example, in the ``m68k-aout`` environment it
+  expands to nothing, but in the ``m68k-coff`` environment it expands
+  to a single :samp:`%`.
+
+.. c:macro:: __USER_LABEL_PREFIX__
+
+  This macro expands to a single token which is the prefix applied to
+  user labels (symbols visible to C code) in assembly.  For example, in
+  the ``m68k-aout`` environment it expands to an :samp:`_`, but in the
+  ``m68k-coff`` environment it expands to nothing.
+
+  This macro will have the correct definition even if
+  :option:`-f(no-)underscores` is in use, but it will not be correct if
+  target-specific options that adjust this prefix are used (e.g. the
+  OSF/rose :option:`-mno-underscores` option).
+
+.. c:macro:: __SIZE_TYPE__
+             __PTRDIFF_TYPE__
+             __WCHAR_TYPE__
+             __WINT_TYPE__
+             __INTMAX_TYPE__
+             __UINTMAX_TYPE__
+             __SIG_ATOMIC_TYPE__
+             __INT8_TYPE__
+             __INT16_TYPE__
+             __INT32_TYPE__
+             __INT64_TYPE__
+             __UINT8_TYPE__
+             __UINT16_TYPE__
+             __UINT32_TYPE__
+             __UINT64_TYPE__
+             __INT_LEAST8_TYPE__
+             __INT_LEAST16_TYPE__
+             __INT_LEAST32_TYPE__
+             __INT_LEAST64_TYPE__
+             __UINT_LEAST8_TYPE__
+             __UINT_LEAST16_TYPE__
+             __UINT_LEAST32_TYPE__
+             __UINT_LEAST64_TYPE__
+             __INT_FAST8_TYPE__
+             __INT_FAST16_TYPE__
+             __INT_FAST32_TYPE__
+             __INT_FAST64_TYPE__
+             __UINT_FAST8_TYPE__
+             __UINT_FAST16_TYPE__
+             __UINT_FAST32_TYPE__
+             __UINT_FAST64_TYPE__
+             __INTPTR_TYPE__
+             __UINTPTR_TYPE__
+
+  These macros are defined to the correct underlying types for the
+  ``size_t``, ``ptrdiff_t``, ``wchar_t``, ``wint_t``,
+  ``intmax_t``, ``uintmax_t``, ``sig_atomic_t``, ``int8_t``,
+  ``int16_t``, ``int32_t``, ``int64_t``, ``uint8_t``,
+  ``uint16_t``, ``uint32_t``, ``uint64_t``,
+  ``int_least8_t``, ``int_least16_t``, ``int_least32_t``,
+  ``int_least64_t``, ``uint_least8_t``, ``uint_least16_t``,
+  ``uint_least32_t``, ``uint_least64_t``, ``int_fast8_t``,
+  ``int_fast16_t``, ``int_fast32_t``, ``int_fast64_t``,
+  ``uint_fast8_t``, ``uint_fast16_t``, ``uint_fast32_t``,
+  ``uint_fast64_t``, ``intptr_t``, and ``uintptr_t`` typedefs,
+  respectively.  They exist to make the standard header files
+  :samp:`stddef.h`, :samp:`stdint.h`, and :samp:`wchar.h` work correctly.
+  You should not use these macros directly; instead, include the
+  appropriate headers and use the typedefs.  Some of these macros may
+  not be defined on particular systems if GCC does not provide a
+  :samp:`stdint.h` header on those systems.
+
+.. c:macro:: __CHAR_BIT__
+
+  Defined to the number of bits used in the representation of the
+  ``char`` data type.  It exists to make the standard header given
+  numerical limits work correctly.  You should not use
+  this macro directly; instead, include the appropriate headers.
+
+.. c:macro::[...]

[diff truncated at 524288 bytes]

[gcc(refs/users/marxin/heads/sphinx-final)] sphinx: copy files from texi2rst-generated repository

[Martin Liska]

https://gcc.gnu.org/g:5b5c326c5a7dfe65e2058b211ce21c21cb94929b

commit 5b5c326c5a7dfe65e2058b211ce21c21cb94929b
Author: Martin Liska <mliska@suse.cz>
Date:   Mon Nov 7 12:54:13 2022 +0100

    sphinx: copy files from texi2rst-generated repository
    
    ChangeLog:
    
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            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/common-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/epiphany-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/h8-300-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/ia-64-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32c-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m32r-d-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/m68k-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mcore-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mep-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microblaze-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/microsoft-windows-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/mips-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/msp430-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nds32-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nios-ii-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/nvidia-ptx-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/powerpc-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/risc-v-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rl78-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/rx-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/s-390-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/sh-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/symbian-os-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/v850-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/visium-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/x86-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/declaring-attributes-of-functions/xstormy16-function-attributes.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/designated-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/determining-the-alignment-of-functions-types-or-variables.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/dollar-signs-in-identifier-names.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/double-word-integers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/enumerator-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/fixed-point-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/format-checks-specific-to-particular-target-machines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/function-names-as-strings.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/getting-the-return-or-frame-address-of-a-function.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/half-precision-floating-point.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/hex-floats.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/how-to-use-inline-assembly-language-in-c-code.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/incomplete-enum-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/label-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/labels-as-values.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/legacy-sync-built-in-functions-for-atomic-memory-access.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/locally-declared-labels.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/macros-with-a-variable-number-of-arguments.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/mixed-declarations-labels-and-code.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/named-address-spaces.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/nested-functions.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-constant-initializers.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/non-lvalue-arrays-may-have-subscripts.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/nonlocal-gotos.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/object-size-checking-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/other-built-in-functions-provided-by-gcc.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pointer-arguments-in-variadic-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pointers-to-arrays-with-qualifiers-work-as-expected.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/pragmas-accepted-by-gcc.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/prototypes-and-old-style-function-definitions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/referring-to-a-type-with-typeof.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/slightly-looser-rules-for-escaped-newlines.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-types.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/specifying-attributes-of-variables.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/statement-attributes.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/statements-and-declarations-in-expressions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/structures-with-no-members.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/support-for-offsetof.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/aarch64-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/alpha-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/altera-nios-ii-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arc-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arc-simd-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-armv8-m-security-extensions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-c-language-extensions-acle.rst:
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            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-floating-point-status-and-control-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/arm-iwmmxt-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/avr-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/basic-powerpc-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/blackfin-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/bpf-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/fr-v-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-dsp-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-loongson-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-paired-single-support.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/mips-simd-architecture-msa-support.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/msp430-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/nds32-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/other-mips-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/picochip-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-altivec-vsx-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-atomic-memory-operation-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-hardware-transactional-memory-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/powerpc-matrix-multiply-assist-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/pru-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/risc-v-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/rx-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/s-390-system-z-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/sh-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/sparc-vis-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/ti-c6x-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-control-flow-protection-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/target-builtins/x86-transactional-memory-intrinsics.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/the-character-esc-in-constants.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/thread-local-storage.rst: New file.
            * doc/gcc/extensions-to-the-c-language-family/unnamed-structure-and-union-fields.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/using-vector-instructions-through-built-in-functions.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/when-is-a-volatile-object-accessed.rst:
            New file.
            * doc/gcc/extensions-to-the-c-language-family/x86-specific-memory-model-extensions-for-transactional-memory.rst:
            New file.
            * doc/gcc/funding.rst: New file.
            * doc/gcc/gcc-command-options.rst: New file.
            * doc/gcc/gcc-command-options/c++-modules.rst: New file.
            * doc/gcc/gcc-command-options/compiling-c++-programs.rst: New file.
            * doc/gcc/gcc-command-options/description.rst: New file.
            * doc/gcc/gcc-command-options/environment-variables-affecting-gcc.rst: New file.
            * doc/gcc/gcc-command-options/gcc-developer-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/aarch64-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/adapteva-epiphany-options.rst:
            New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/amd-gcn-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/arc-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/arm-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/avr-mmcu.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/avr-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/blackfin-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/c-sky-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/c6x-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/cris-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/darwin-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/dec-alpha-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/ebpf-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/fr30-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/frv-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/ft32-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/gnu-linux-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/h8-300-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/hppa-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/ia-64-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/ibm-rs-6000-and-powerpc-options.rst:
            New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/lm32-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/loongarch-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/m32c-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/m32r-d-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/m680x0-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mcore-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mep-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/microblaze-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mips-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mmix-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/mn10300-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/moxie-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/msp430-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/nds32-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/nios-ii-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/nvidia-ptx-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/openrisc-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/options-for-system-v.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/pdp-11-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/picochip-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/powerpc-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/pru-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/risc-v-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/rl78-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/rx-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/s-390-and-zseries-options.rst:
            New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/score-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/sh-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/solaris-2-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/sparc-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/v850-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/vax-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/visium-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/vms-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/vxworks-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/x86-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/x86-windows-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/xstormy16-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/xtensa-options.rst: New file.
            * doc/gcc/gcc-command-options/machine-dependent-options/zseries-options.rst: New file.
            * doc/gcc/gcc-command-options/option-summary.rst: New file.
            * doc/gcc/gcc-command-options/options-controlling-c++-dialect.rst: New file.
            * doc/gcc/gcc-command-options/options-controlling-c-dialect.rst: New file.
            * doc/gcc/gcc-command-options/options-controlling-objective-c-and-objective-c++-dialects.rst:
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            * doc/gcc/gcc-command-options/options-controlling-the-kind-of-output.rst: New file.
            * doc/gcc/gcc-command-options/options-controlling-the-preprocessor.rst: New file.
            * doc/gcc/gcc-command-options/options-for-code-generation-conventions.rst: New file.
            * doc/gcc/gcc-command-options/options-for-debugging-your-program.rst: New file.
            * doc/gcc/gcc-command-options/options-for-directory-search.rst: New file.
            * doc/gcc/gcc-command-options/options-for-linking.rst: New file.
            * doc/gcc/gcc-command-options/options-that-control-optimization.rst: New file.
            * doc/gcc/gcc-command-options/options-that-control-static-analysis.rst: New file.
            * doc/gcc/gcc-command-options/options-to-control-diagnostic-messages-formatting.rst:
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            * doc/gcc/gcc-command-options/options-to-request-or-suppress-warnings.rst: New file.
            * doc/gcc/gcc-command-options/passing-options-to-the-assembler.rst: New file.
            * doc/gcc/gcc-command-options/program-instrumentation-options.rst: New file.
            * doc/gcc/gcc-command-options/specifying-subprocesses-and-the-switches-to-pass-to-them.rst:
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            * doc/gcc/gcc-command-options/using-precompiled-headers.rst: New file.
            * doc/gcc/gcc.rst: New file.
            * doc/gcc/gcov-dump.rst: New file.
            * doc/gcc/gcov-tool.rst: New file.
            * doc/gcc/gcov.rst: New file.
            * doc/gcc/gcov/brief-description-of-gcov-data-files.rst: New file.
            * doc/gcc/gcov/data-file-relocation-to-support-cross-profiling.rst: New file.
            * doc/gcc/gcov/introduction-to-gcov.rst: New file.
            * doc/gcc/gcov/invoking-gcov.rst: New file.
            * doc/gcc/gcov/profiling-and-test-coverage-in-freestanding-environments.rst: New file.
            * doc/gcc/gcov/using-gcov-with-gcc-optimization.rst: New file.
            * doc/gcc/general-public-license-3.rst: New file.
            * doc/gcc/gnu-free-documentation-license.rst: New file.
            * doc/gcc/gnu-objective-c-features.rst: New file.
            * doc/gcc/gnu-objective-c-features/compatibilityalias.rst: New file.
            * doc/gcc/gnu-objective-c-features/constant-string-objects.rst: New file.
            * doc/gcc/gnu-objective-c-features/exceptions.rst: New file.
            * doc/gcc/gnu-objective-c-features/fast-enumeration.rst: New file.
            * doc/gcc/gnu-objective-c-features/garbage-collection.rst: New file.
            * doc/gcc/gnu-objective-c-features/gnu-objective-c-runtime-api.rst: New file.
            * doc/gcc/gnu-objective-c-features/load-executing-code-before-main.rst: New file.
            * doc/gcc/gnu-objective-c-features/messaging-with-the-gnu-objective-c-runtime.rst: New file.
            * doc/gcc/gnu-objective-c-features/synchronization.rst: New file.
            * doc/gcc/gnu-objective-c-features/type-encoding.rst: New file.
            * doc/gcc/gnu.rst: New file.
            * doc/gcc/have-you-found-a-bug.rst: New file.
            * doc/gcc/how-and-where-to-report-bugs.rst: New file.
            * doc/gcc/how-to-get-help-with-gcc.rst: New file.
            * doc/gcc/index.rst: New file.
            * doc/gcc/indices-and-tables.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/actual-bugs-we-havent-fixed-yet.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/certain-changes-we-dont-want-to-make.rst:
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            * doc/gcc/known-causes-of-trouble-with-gcc/common-misunderstandings-with-gnu-c.rst:
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            * doc/gcc/known-causes-of-trouble-with-gcc/disappointments-and-misunderstandings.rst:
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            * doc/gcc/known-causes-of-trouble-with-gcc/fixed-header-files.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/incompatibilities-of-gcc.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/interoperation.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/standard-libraries.rst: New file.
            * doc/gcc/known-causes-of-trouble-with-gcc/warning-messages-and-error-messages.rst:
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            * doc/gcc/language-standards-supported-by-gcc.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/c++-language.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/c-language.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/d-language.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/go-language.rst: New file.
            * doc/gcc/language-standards-supported-by-gcc/objective-c-and-objective-c++-languages.rst:
            New file.
            * doc/gcc/language-standards-supported-by-gcc/references-for-other-languages.rst: New file.
            * doc/gcc/lto-dump.rst: New file.
            * doc/gcc/programming-languages-supported-by-gcc.rst: New file.
            * doc/gcc/reporting-bugs.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/alias-analysis.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/annotations.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/memory-model.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/ssa-operands.rst: New file.
            * doc/gccint/analysis-and-optimization-of-gimple-tuples/static-single-assignment.rst:
            New file.
            * doc/gccint/analysis-and-representation-of-loops.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/data-dependency-analysis.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/iv-analysis-on-rtl.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/loop-closed-ssa-form.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/loop-manipulation.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/loop-querying.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/loop-representation.rst: New file.
            * doc/gccint/analysis-and-representation-of-loops/number-of-iterations-analysis.rst:
            New file.
            * doc/gccint/analysis-and-representation-of-loops/scalar-evolutions.rst: New file.
            * doc/gccint/analyzer-internals.rst: New file.
            * doc/gccint/collect2.rst: New file.
            * doc/gccint/conf.py: New file.
            * doc/gccint/contributing-to-gcc-development.rst: New file.
            * doc/gccint/contributors-to-gcc.rst: New file.
            * doc/gccint/control-flow-graph.rst: New file.
            * doc/gccint/control-flow-graph/basic-blocks.rst: New file.
            * doc/gccint/control-flow-graph/edges.rst: New file.
            * doc/gccint/control-flow-graph/liveness-information.rst: New file.
            * doc/gccint/control-flow-graph/maintaining-the-cfg.rst: New file.
            * doc/gccint/control-flow-graph/profile-information.rst: New file.
            * doc/gccint/copyright.rst: New file.
            * doc/gccint/debugging-the-analyzer.rst: New file.
            * doc/gccint/funding.rst: New file.
            * doc/gccint/gcc-and-portability.rst: New file.
            * doc/gccint/general-public-license-3.rst: New file.
            * doc/gccint/generic.rst: New file.
            * doc/gccint/generic/attributes-in-trees.rst: New file.
            * doc/gccint/generic/c-and-c++-trees.rst: New file.
            * doc/gccint/generic/declarations.rst: New file.
            * doc/gccint/generic/deficiencies.rst: New file.
            * doc/gccint/generic/expressions.rst: New file.
            * doc/gccint/generic/functions.rst: New file.
            * doc/gccint/generic/language-dependent-trees.rst: New file.
            * doc/gccint/generic/overview.rst: New file.
            * doc/gccint/generic/statements.rst: New file.
            * doc/gccint/generic/types.rst: New file.
            * doc/gccint/gimple-api.rst: New file.
            * doc/gccint/gimple.rst: New file.
            * doc/gccint/gimple/adding-a-new-gimple-statement-code.rst: New file.
            * doc/gccint/gimple/class-hierarchy-of-gimple-statements.rst: New file.
            * doc/gccint/gimple/exception-handling.rst: New file.
            * doc/gccint/gimple/gimple-instruction-set.rst: New file.
            * doc/gccint/gimple/gimple-sequences.rst: New file.
            * doc/gccint/gimple/manipulating-gimple-statements.rst: New file.
            * doc/gccint/gimple/operands.rst: New file.
            * doc/gccint/gimple/sequence-iterators.rst: New file.
            * doc/gccint/gimple/statement-and-operand-traversals.rst: New file.
            * doc/gccint/gimple/temporaries.rst: New file.
            * doc/gccint/gimple/tuple-representation.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleasm.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleassign.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplebind.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplecall.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplecatch.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplecond.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpledebug.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleehfilter.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplegoto.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplelabel.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplenop.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompatomicload.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompatomicstore.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompcontinue.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompcritical.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompfor.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompmaster.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompordered.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompparallel.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompreturn.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompsection.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompsections.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleompsingle.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplephi.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleresx.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplereturn.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpleswitch.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimpletry.rst: New file.
            * doc/gccint/gimple/tuple-specific-accessors/gimplewithcleanupexpr.rst: New file.
            * doc/gccint/gnu-free-documentation-license.rst: New file.
            * doc/gccint/guidelines-for-diagnostics.rst: New file.
            * doc/gccint/guidelines-for-options.rst: New file.
            * doc/gccint/host-common.rst: New file.
            * doc/gccint/host-configuration.rst: New file.
            * doc/gccint/host-filesystem.rst: New file.
            * doc/gccint/host-makefile-fragments.rst: New file.
            * doc/gccint/host-misc.rst: New file.
            * doc/gccint/index.rst: New file.
            * doc/gccint/indices-and-tables.rst: New file.
            * doc/gccint/interfacing-to-gcc-output.rst: New file.
            * doc/gccint/introduction.rst: New file.
            * doc/gccint/language-front-ends-in-gcc.rst: New file.
            * doc/gccint/link-time-optimization.rst: New file.
            * doc/gccint/link-time-optimization/design-overview.rst: New file.
            * doc/gccint/link-time-optimization/internal-flags-controlling-lto1.rst: New file.
            * doc/gccint/link-time-optimization/lto-file-sections.rst: New file.
            * doc/gccint/link-time-optimization/using-summary-information-in-ipa-passes.rst: New file.
            * doc/gccint/link-time-optimization/whole-program-assumptions-linker-plugin-and-symbol-visibilities.rst:
            New file.
            * doc/gccint/machine-descriptions.rst: New file.
            * doc/gccint/machine-descriptions/c-statements-for-assembler-output.rst: New file.
            * doc/gccint/machine-descriptions/canonicalization-of-instructions.rst: New file.
            * doc/gccint/machine-descriptions/conditional-execution.rst: New file.
            * doc/gccint/machine-descriptions/constant-definitions.rst: New file.
            * doc/gccint/machine-descriptions/defining-how-to-split-instructions.rst: New file.
            * doc/gccint/machine-descriptions/defining-jump-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/defining-looping-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/defining-rtl-sequences-for-code-generation.rst: New file.
            * doc/gccint/machine-descriptions/everything-about-instruction-patterns.rst: New file.
            * doc/gccint/machine-descriptions/example-of-defineinsn.rst: New file.
            * doc/gccint/machine-descriptions/including-patterns-in-machine-descriptions.rst: New file.
            * doc/gccint/machine-descriptions/instruction-attributes.rst: New file.
            * doc/gccint/machine-descriptions/interdependence-of-patterns.rst: New file.
            * doc/gccint/machine-descriptions/iterators.rst: New file.
            * doc/gccint/machine-descriptions/machine-specific-peephole-optimizers.rst: New file.
            * doc/gccint/machine-descriptions/operand-constraints.rst: New file.
            * doc/gccint/machine-descriptions/output-templates-and-operand-substitution.rst: New file.
            * doc/gccint/machine-descriptions/overview-of-how-the-machine-description-is-used.rst:
            New file.
            * doc/gccint/machine-descriptions/predicates.rst: New file.
            * doc/gccint/machine-descriptions/rtl-template.rst: New file.
            * doc/gccint/machine-descriptions/rtl-templates-transformations.rst: New file.
            * doc/gccint/machine-descriptions/standard-pattern-names-for-generation.rst: New file.
            * doc/gccint/machine-descriptions/when-the-order-of-patterns-matters.rst: New file.
            * doc/gccint/makefile-fragments.rst: New file.
            * doc/gccint/match-and-simplify.rst: New file.
            * doc/gccint/memory-management-and-type-information.rst: New file.
            * doc/gccint/memory-management-and-type-information/how-to-invoke-the-garbage-collector.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/marking-roots-for-the-garbage-collector.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/source-files-containing-type-information.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/support-for-inheritance.rst: New file.
            * doc/gccint/memory-management-and-type-information/support-for-user-provided-gc-marking-routines.rst:
            New file.
            * doc/gccint/memory-management-and-type-information/the-inside-of-a-gty.rst: New file.
            * doc/gccint/memory-management-and-type-information/troubleshooting-the-garbage-collector.rst:
            New file.
            * doc/gccint/option-file-format.rst: New file.
            * doc/gccint/option-properties.rst: New file.
            * doc/gccint/option-specification-files.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/gimplification-pass.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/inter-procedural-optimization-passes.rst:
            New file.
            * doc/gccint/passes-and-files-of-the-compiler/optimization-info.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/parsing-pass.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/pass-manager.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/rtl-passes.rst: New file.
            * doc/gccint/passes-and-files-of-the-compiler/tree-ssa-passes.rst: New file.
            * doc/gccint/plugins.rst: New file.
            * doc/gccint/plugins/building-gcc-plugins.rst: New file.
            * doc/gccint/plugins/controlling-which-passes-are-being-run.rst: New file.
            * doc/gccint/plugins/giving-information-about-a-plugin.rst: New file.
            * doc/gccint/plugins/interacting-with-the-gcc-garbage-collector.rst: New file.
            * doc/gccint/plugins/interacting-with-the-pass-manager.rst: New file.
            * doc/gccint/plugins/keeping-track-of-available-passes.rst: New file.
            * doc/gccint/plugins/loading-plugins.rst: New file.
            * doc/gccint/plugins/plugin-api.rst: New file.
            * doc/gccint/plugins/recording-information-about-pass-execution.rst: New file.
            * doc/gccint/plugins/registering-custom-attributes-or-pragmas.rst: New file.
            * doc/gccint/rtl-representation.rst: New file.
            * doc/gccint/rtl-representation/access-to-operands.rst: New file.
            * doc/gccint/rtl-representation/access-to-special-operands.rst: New file.
            * doc/gccint/rtl-representation/assembler-instructions-as-expressions.rst: New file.
            * doc/gccint/rtl-representation/bit-fields.rst: New file.
            * doc/gccint/rtl-representation/comparison-operations.rst: New file.
            * doc/gccint/rtl-representation/constant-expression-types.rst: New file.
            * doc/gccint/rtl-representation/conversions.rst: New file.
            * doc/gccint/rtl-representation/declarations.rst: New file.
            * doc/gccint/rtl-representation/embedded-side-effects-on-addresses.rst: New file.
            * doc/gccint/rtl-representation/flags-in-an-rtl-expression.rst: New file.
            * doc/gccint/rtl-representation/insns.rst: New file.
            * doc/gccint/rtl-representation/machine-modes.rst: New file.
            * doc/gccint/rtl-representation/on-the-side-ssa-form-for-rtl.rst: New file.
            * doc/gccint/rtl-representation/reading-rtl.rst: New file.
            * doc/gccint/rtl-representation/registers-and-memory.rst: New file.
            * doc/gccint/rtl-representation/rtl-classes-and-formats.rst: New file.
            * doc/gccint/rtl-representation/rtl-expressions-for-arithmetic.rst: New file.
            * doc/gccint/rtl-representation/rtl-object-types.rst: New file.
            * doc/gccint/rtl-representation/rtl-representation-of-function-call-insns.rst: New file.
            * doc/gccint/rtl-representation/side-effect-expressions.rst: New file.
            * doc/gccint/rtl-representation/structure-sharing-assumptions.rst: New file.
            * doc/gccint/rtl-representation/variable-location-debug-information-in-rtl.rst: New file.
            * doc/gccint/rtl-representation/vector-operations.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/alignment-of-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/arithmetic-on-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/comparisons-involving-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/computing-bounds-on-polyints.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/consequences-of-using-polyint.rst:
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            * doc/gccint/sizes-and-offsets-as-runtime-invariants/converting-polyints.rst: New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/guidelines-for-using-polyint.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/miscellaneous-polyint-routines.rst:
            New file.
            * doc/gccint/sizes-and-offsets-as-runtime-invariants/overview-of-polyint.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/configure-terms-and-history.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory.rst: New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-language-front-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/anatomy-of-a-target-back-end.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/build-system-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/building-documentation.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/configuration-in-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/headers-installed-by-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/library-source-files-and-headers-under-the-gcc-directory.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/makefile-targets.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/the-gcc-subdirectory/subdirectories-of-gcc.rst:
            New file.
            * doc/gccint/source-tree-structure-and-build-system/top-level-source-directory.rst:
            New file.
            * doc/gccint/standard-header-file-directories.rst: New file.
            * doc/gccint/static-analyzer.rst: New file.
            * doc/gccint/target-macros.rst: New file.
            * doc/gccint/target-macros/adding-support-for-named-address-spaces.rst: New file.
            * doc/gccint/target-macros/addressing-modes.rst: New file.
            * doc/gccint/target-macros/adjusting-the-instruction-scheduler.rst: New file.
            * doc/gccint/target-macros/anchored-addresses.rst: New file.
            * doc/gccint/target-macros/c++-abi-parameters.rst: New file.
            * doc/gccint/target-macros/condition-code-status.rst: New file.
            * doc/gccint/target-macros/controlling-debugging-information-format.rst: New file.
            * doc/gccint/target-macros/controlling-the-compilation-driver-gcc.rst: New file.
            * doc/gccint/target-macros/cross-compilation-and-floating-point.rst: New file.
            * doc/gccint/target-macros/d-abi-parameters.rst: New file.
            * doc/gccint/target-macros/defining-coprocessor-specifics-for-mips-targets.rst: New file.
            * doc/gccint/target-macros/defining-data-structures-for-per-function-information.rst:
            New file.
            * doc/gccint/target-macros/defining-target-specific-uses-of-attribute.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language.rst: New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-alignment.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/assembler-commands-for-exception-regions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/how-initialization-functions-are-handled.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/macros-controlling-initialization-routines.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-and-generation-of-labels.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-assembler-instructions.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-data.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-dispatch-tables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/output-of-uninitialized-variables.rst:
            New file.
            * doc/gccint/target-macros/defining-the-output-assembler-language/the-overall-framework-of-an-assembler-file.rst:
            New file.
            * doc/gccint/target-macros/describing-relative-costs-of-operations.rst: New file.
            * doc/gccint/target-macros/dividing-the-output-into-sections-texts-data.rst: New file.
            * doc/gccint/target-macros/emulating-tls.rst: New file.
            * doc/gccint/target-macros/implementing-the-varargs-macros.rst: New file.
            * doc/gccint/target-macros/implicit-calls-to-library-routines.rst: New file.
            * doc/gccint/target-macros/layout-of-source-language-data-types.rst: New file.
            * doc/gccint/target-macros/miscellaneous-parameters.rst: New file.
            * doc/gccint/target-macros/mode-switching-instructions.rst: New file.
            * doc/gccint/target-macros/parameters-for-precompiled-header-validity-checking.rst:
            New file.
            * doc/gccint/target-macros/position-independent-code.rst: New file.
            * doc/gccint/target-macros/register-classes.rst: New file.
            * doc/gccint/target-macros/register-usage.rst: New file.
            * doc/gccint/target-macros/run-time-target-specification.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions.rst: New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/basic-stack-layout.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/caller-saves-register-allocation.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/eliminating-frame-pointer-and-arg-pointer.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/exception-handling-support.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/function-entry-and-exit.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/generating-code-for-profiling.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-large-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/how-scalar-function-values-are-returned.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/miscellaneous-register-hooks.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-arguments-in-registers.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/passing-function-arguments-on-the-stack.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/permitting-tail-calls.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/registers-that-address-the-stack-frame.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/shrink-wrapping-separate-components.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/specifying-how-stack-checking-is-done.rst:
            New file.
            * doc/gccint/target-macros/stack-layout-and-calling-conventions/stack-smashing-protection.rst:
            New file.
            * doc/gccint/target-macros/storage-layout.rst: New file.
            * doc/gccint/target-macros/support-for-nested-functions.rst: New file.
            * doc/gccint/target-macros/the-global-targetm-variable.rst: New file.
            * doc/gccint/target-makefile-fragments.rst: New file.
            * doc/gccint/testsuites.rst: New test.
            * doc/gccint/testsuites/ada-language-testsuites.rst: New test.
            * doc/gccint/testsuites/c-language-testsuites.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests.rst: New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/commands-for-use-in-dg-final.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/features-for-dg-add-options.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/keywords-describing-target-attributes.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/selecting-targets-to-which-a-test-applies.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/syntax-and-descriptions-of-test-directives.rst:
            New test.
            * doc/gccint/testsuites/directives-used-within-dejagnu-tests/variants-of-dg-require-support.rst:
            New test.
            * doc/gccint/testsuites/idioms-used-in-testsuite-code.rst: New test.
            * doc/gccint/testsuites/support-for-testing-binary-compatibility.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gcov.rst: New test.
            * doc/gccint/testsuites/support-for-testing-gimple-passes.rst: New test.
            * doc/gccint/testsuites/support-for-testing-link-time-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-profile-directed-optimizations.rst: New test.
            * doc/gccint/testsuites/support-for-testing-rtl-passes.rst: New test.
            * doc/gccint/testsuites/support-for-torture-testing-using-multiple-options.rst: New test.
            * doc/gccint/the-gcc-low-level-runtime-library.rst: New file.
            * doc/gccint/the-gcc-low-level-runtime-library/language-independent-routines-for-exception-handling.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/miscellaneous-runtime-library-routines.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-decimal-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-fixed-point-fractional-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-floating-point-emulation.rst:
            New file.
            * doc/gccint/the-gcc-low-level-runtime-library/routines-for-integer-arithmetic.rst:
            New file.
            * doc/gccint/the-language.rst: New file.
            * doc/gccint/user-experience-guidelines.rst: New file.
            * doc/install/binaries.rst: New file.
            * doc/install/building.rst: New file.
            * doc/install/building/building-a-cross-compiler.rst: New file.
            * doc/install/building/building-a-native-compiler.rst: New file.
            * doc/install/building/building-in-parallel.rst: New file.
            * doc/install/building/building-the-ada-compiler.rst: New file.
            * doc/install/building/building-the-d-compiler.rst: New file.
            * doc/install/building/building-with-profile-feedback.rst: New file.
            * doc/install/conf.py: New file.
            * doc/install/configuration.rst: New file.
            * doc/install/copyright.rst: New file.
            * doc/install/downloading-gcc.rst: New file.
            * doc/install/final-installation.rst: New file.
            * doc/install/gnu-free-documentation-license.rst: New file.
            * doc/install/host-target-specific-installation-notes-for-gcc.rst: New file.
            * doc/install/how-can-you-run-the-testsuite-on-selected-tests.rst: New test.
            * doc/install/how-to-interpret-test-results.rst: New file.
            * doc/install/index.rst: New file.
            * doc/install/indices-and-tables.rst: New file.
            * doc/install/installing-gcc.rst: New file.
            * doc/install/passing-options-and-running-multiple-testsuites.rst: New test.
            * doc/install/prerequisites.rst: New file.
            * doc/install/submitting-test-results.rst: New file.
            * doc/install/testing.rst: New file.
    
    gcc/fortran/ChangeLog:
    
            * doc/gfc-internals/code-that-interacts-with-the-user.rst: New file.
            * doc/gfc-internals/command-line-options.rst: New file.
            * doc/gfc-internals/conf.py: New file.
            * doc/gfc-internals/copyright.rst: New file.
            * doc/gfc-internals/error-handling.rst: New file.
            * doc/gfc-internals/frontend-data-structures.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages.rst: New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/accessing-declarations.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/basic-data-structures.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/converting-expressions-to-tree.rst:
            New file.
            * doc/gfc-internals/generating-the-intermediate-language-for-later-stages/translating-statements.rst:
            New file.
            * doc/gfc-internals/gfccode.rst: New file.
            * doc/gfc-internals/gfcexpr.rst: New file.
            * doc/gfc-internals/gnu-free-documentation-license.rst: New file.
            * doc/gfc-internals/index.rst: New file.
            * doc/gfc-internals/indices-and-tables.rst: New file.
            * doc/gfc-internals/internals-of-fortran-2003-oop-features.rst: New file.
            * doc/gfc-internals/introduction.rst: New file.
            * doc/gfc-internals/symbol-versioning.rst: New file.
            * doc/gfc-internals/the-libgfortran-runtime-library.rst: New file.
            * doc/gfc-internals/type-bound-operators.rst: New file.
            * doc/gfc-internals/type-bound-procedures.rst: New file.
            * doc/gfortran/about-gnu-fortran.rst: New file.
            * doc/gfortran/coarray-programming.rst: New file.
            * doc/gfortran/compiler-characteristics.rst: New file.
            * doc/gfortran/compiler-characteristics/asynchronous-i-o.rst: New file.
            * doc/gfortran/compiler-characteristics/data-consistency-and-durability.rst: New file.
            * doc/gfortran/compiler-characteristics/evaluation-of-logical-expressions.rst: New file.
            * doc/gfortran/compiler-characteristics/file-format-of-unformatted-sequential-files.rst:
            New file.
            * doc/gfortran/compiler-characteristics/file-operations-on-symbolic-links.rst: New file.
            * doc/gfortran/compiler-characteristics/files-opened-without-an-explicit-action=-specifier.rst:
            New file.
            * doc/gfortran/compiler-characteristics/internal-representation-of-logical-variables.rst:
            New file.
            * doc/gfortran/compiler-characteristics/kind-type-parameters.rst: New file.
            * doc/gfortran/compiler-characteristics/max-and-min-intrinsics-with-real-nan-arguments.rst:
            New file.
            * doc/gfortran/compiler-characteristics/thread-safety-of-the-runtime-library.rst: New file.
            * doc/gfortran/conf.py: New file.
            * doc/gfortran/contributing.rst: New file.
            * doc/gfortran/contributors-to-gnu-fortran.rst: New file.
            * doc/gfortran/copyright.rst: New file.
            * doc/gfortran/extensions-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions-not-implemented-in-gnu-fortran.rst: New file.
            * doc/gfortran/extensions.rst: New file.
            * doc/gfortran/function-abi-documentation.rst: New file.
            * doc/gfortran/funding.rst: New file.
            * doc/gfortran/general-public-license-3.rst: New file.
            * doc/gfortran/gnu-fortran-and-gcc.rst: New file.
            * doc/gfortran/gnu-fortran-command-options.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/description.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/enable-and-customize-preprocessing.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/environment-variables-affecting-gfortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-runtime-behavior.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/influencing-the-linking-step.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/option-summary.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-controlling-fortran-dialect.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-code-generation-conventions.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-debugging-your-program-or-gnu-fortran.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-directory-search.rst: New file.
            * doc/gfortran/gnu-fortran-command-options/options-for-interoperability-with-other-languages.rst:
            New file.
            * doc/gfortran/gnu-fortran-command-options/options-to-request-or-suppress-errors-and-warnings.rst:
            New file.
            * doc/gfortran/gnu-fortran-compiler-directives.rst: New file.
            * doc/gfortran/gnu-free-documentation-license.rst: New file.
            * doc/gfortran/index.rst: New file.
            * doc/gfortran/indices-and-tables.rst: New file.
            * doc/gfortran/interoperability-with-c.rst: New file.
            * doc/gfortran/intrinsic-modules.rst: New file.
            * doc/gfortran/intrinsic-modules/ieee-modules-ieeeexceptions-ieeearithmetic-and-ieeefeatures.rst:
            New file.
            * doc/gfortran/intrinsic-modules/isocbinding.rst: New file.
            * doc/gfortran/intrinsic-modules/isofortranenv.rst: New file.
            * doc/gfortran/intrinsic-modules/openacc-module-openacc.rst: New file.
            * doc/gfortran/intrinsic-modules/openmp-modules-omplib-and-omplibkinds.rst: New file.
            * doc/gfortran/intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/abort.rst: New file.
            * doc/gfortran/intrinsic-procedures/abs.rst: New file.
            * doc/gfortran/intrinsic-procedures/access.rst: New file.
            * doc/gfortran/intrinsic-procedures/achar.rst: New file.
            * doc/gfortran/intrinsic-procedures/acos.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/acosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustl.rst: New file.
            * doc/gfortran/intrinsic-procedures/adjustr.rst: New file.
            * doc/gfortran/intrinsic-procedures/aimag.rst: New file.
            * doc/gfortran/intrinsic-procedures/aint.rst: New file.
            * doc/gfortran/intrinsic-procedures/alarm.rst: New file.
            * doc/gfortran/intrinsic-procedures/all.rst: New file.
            * doc/gfortran/intrinsic-procedures/allocated.rst: New file.
            * doc/gfortran/intrinsic-procedures/and.rst: New file.
            * doc/gfortran/intrinsic-procedures/anint.rst: New file.
            * doc/gfortran/intrinsic-procedures/any.rst: New file.
            * doc/gfortran/intrinsic-procedures/asin.rst: New file.
            * doc/gfortran/intrinsic-procedures/asind.rst: New file.
            * doc/gfortran/intrinsic-procedures/asinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/associated.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2.rst: New file.
            * doc/gfortran/intrinsic-procedures/atan2d.rst: New file.
            * doc/gfortran/intrinsic-procedures/atand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomiccas.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicdefine.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchadd.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchand.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicfetchxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicor.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicref.rst: New file.
            * doc/gfortran/intrinsic-procedures/atomicxor.rst: New file.
            * doc/gfortran/intrinsic-procedures/backtrace.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj0.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselj1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besseljn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely0.rst: New file.
            * doc/gfortran/intrinsic-procedures/bessely1.rst: New file.
            * doc/gfortran/intrinsic-procedures/besselyn.rst: New file.
            * doc/gfortran/intrinsic-procedures/bge.rst: New file.
            * doc/gfortran/intrinsic-procedures/bgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/bitsize.rst: New file.
            * doc/gfortran/intrinsic-procedures/ble.rst: New file.
            * doc/gfortran/intrinsic-procedures/blt.rst: New file.
            * doc/gfortran/intrinsic-procedures/btest.rst: New file.
            * doc/gfortran/intrinsic-procedures/cassociated.rst: New file.
            * doc/gfortran/intrinsic-procedures/ceiling.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfprocpointer.rst: New file.
            * doc/gfortran/intrinsic-procedures/cfunloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/char.rst: New file.
            * doc/gfortran/intrinsic-procedures/chdir.rst: New file.
            * doc/gfortran/intrinsic-procedures/chmod.rst: New file.
            * doc/gfortran/intrinsic-procedures/cloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/cmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/cobroadcast.rst: New file.
            * doc/gfortran/intrinsic-procedures/comax.rst: New file.
            * doc/gfortran/intrinsic-procedures/comin.rst: New file.
            * doc/gfortran/intrinsic-procedures/commandargumentcount.rst: New file.
            * doc/gfortran/intrinsic-procedures/compileroptions.rst: New file.
            * doc/gfortran/intrinsic-procedures/compilerversion.rst: New file.
            * doc/gfortran/intrinsic-procedures/complex.rst: New file.
            * doc/gfortran/intrinsic-procedures/conjg.rst: New file.
            * doc/gfortran/intrinsic-procedures/coreduce.rst: New file.
            * doc/gfortran/intrinsic-procedures/cos.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosd.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosh.rst: New file.
            * doc/gfortran/intrinsic-procedures/cosum.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotan.rst: New file.
            * doc/gfortran/intrinsic-procedures/cotand.rst: New file.
            * doc/gfortran/intrinsic-procedures/count.rst: New file.
            * doc/gfortran/intrinsic-procedures/cputime.rst: New file.
            * doc/gfortran/intrinsic-procedures/cshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/csizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/ctime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dateandtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/dble.rst: New file.
            * doc/gfortran/intrinsic-procedures/dcmplx.rst: New file.
            * doc/gfortran/intrinsic-procedures/digits.rst: New file.
            * doc/gfortran/intrinsic-procedures/dim.rst: New file.
            * doc/gfortran/intrinsic-procedures/dotproduct.rst: New file.
            * doc/gfortran/intrinsic-procedures/dprod.rst: New file.
            * doc/gfortran/intrinsic-procedures/dreal.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/dshiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/dtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eoshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/epsilon.rst: New file.
            * doc/gfortran/intrinsic-procedures/erf.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfc.rst: New file.
            * doc/gfortran/intrinsic-procedures/erfcscaled.rst: New file.
            * doc/gfortran/intrinsic-procedures/etime.rst: New file.
            * doc/gfortran/intrinsic-procedures/eventquery.rst: New file.
            * doc/gfortran/intrinsic-procedures/executecommandline.rst: New file.
            * doc/gfortran/intrinsic-procedures/exit.rst: New file.
            * doc/gfortran/intrinsic-procedures/exp.rst: New file.
            * doc/gfortran/intrinsic-procedures/exponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/extendstypeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/fdate.rst: New file.
            * doc/gfortran/intrinsic-procedures/fget.rst: New file.
            * doc/gfortran/intrinsic-procedures/fgetc.rst: New file.
            * doc/gfortran/intrinsic-procedures/findloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/floor.rst: New file.
            * doc/gfortran/intrinsic-procedures/flush.rst: New file.
            * doc/gfortran/intrinsic-procedures/fnum.rst: New file.
            * doc/gfortran/intrinsic-procedures/fput.rst: New file.
            * doc/gfortran/intrinsic-procedures/fputc.rst: New file.
            * doc/gfortran/intrinsic-procedures/fraction.rst: New file.
            * doc/gfortran/intrinsic-procedures/free.rst: New file.
            * doc/gfortran/intrinsic-procedures/fseek.rst: New file.
            * doc/gfortran/intrinsic-procedures/fstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ftell.rst: New file.
            * doc/gfortran/intrinsic-procedures/gamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/gerror.rst: New file.
            * doc/gfortran/intrinsic-procedures/getarg.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommand.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcommandargument.rst: New file.
            * doc/gfortran/intrinsic-procedures/getcwd.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenv.rst: New file.
            * doc/gfortran/intrinsic-procedures/getenvironmentvariable.rst: New file.
            * doc/gfortran/intrinsic-procedures/getgid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getlog.rst: New file.
            * doc/gfortran/intrinsic-procedures/getpid.rst: New file.
            * doc/gfortran/intrinsic-procedures/getuid.rst: New file.
            * doc/gfortran/intrinsic-procedures/gmtime.rst: New file.
            * doc/gfortran/intrinsic-procedures/hostnm.rst: New file.
            * doc/gfortran/intrinsic-procedures/huge.rst: New file.
            * doc/gfortran/intrinsic-procedures/hypot.rst: New file.
            * doc/gfortran/intrinsic-procedures/iachar.rst: New file.
            * doc/gfortran/intrinsic-procedures/iall.rst: New file.
            * doc/gfortran/intrinsic-procedures/iand.rst: New file.
            * doc/gfortran/intrinsic-procedures/iany.rst: New file.
            * doc/gfortran/intrinsic-procedures/iargc.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibclr.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibits.rst: New file.
            * doc/gfortran/intrinsic-procedures/ibset.rst: New file.
            * doc/gfortran/intrinsic-procedures/ichar.rst: New file.
            * doc/gfortran/intrinsic-procedures/idate.rst: New file.
            * doc/gfortran/intrinsic-procedures/ieor.rst: New file.
            * doc/gfortran/intrinsic-procedures/ierrno.rst: New file.
            * doc/gfortran/intrinsic-procedures/imageindex.rst: New file.
            * doc/gfortran/intrinsic-procedures/index.rst: New file.
            * doc/gfortran/intrinsic-procedures/int.rst: New file.
            * doc/gfortran/intrinsic-procedures/int2.rst: New file.
            * doc/gfortran/intrinsic-procedures/int8.rst: New file.
            * doc/gfortran/intrinsic-procedures/introduction-to-intrinsic-procedures.rst: New file.
            * doc/gfortran/intrinsic-procedures/ior.rst: New file.
            * doc/gfortran/intrinsic-procedures/iparity.rst: New file.
            * doc/gfortran/intrinsic-procedures/irand.rst: New file.
            * doc/gfortran/intrinsic-procedures/isatty.rst: New file.
            * doc/gfortran/intrinsic-procedures/iscontiguous.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishft.rst: New file.
            * doc/gfortran/intrinsic-procedures/ishftc.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostatend.rst: New file.
            * doc/gfortran/intrinsic-procedures/isiostateor.rst: New file.
            * doc/gfortran/intrinsic-procedures/isnan.rst: New file.
            * doc/gfortran/intrinsic-procedures/itime.rst: New file.
            * doc/gfortran/intrinsic-procedures/kill.rst: New file.
            * doc/gfortran/intrinsic-procedures/kind.rst: New file.
            * doc/gfortran/intrinsic-procedures/lbound.rst: New file.
            * doc/gfortran/intrinsic-procedures/lcobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/leadz.rst: New file.
            * doc/gfortran/intrinsic-procedures/len.rst: New file.
            * doc/gfortran/intrinsic-procedures/lentrim.rst: New file.
            * doc/gfortran/intrinsic-procedures/lge.rst: New file.
            * doc/gfortran/intrinsic-procedures/lgt.rst: New file.
            * doc/gfortran/intrinsic-procedures/link.rst: New file.
            * doc/gfortran/intrinsic-procedures/lle.rst: New file.
            * doc/gfortran/intrinsic-procedures/llt.rst: New file.
            * doc/gfortran/intrinsic-procedures/lnblnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/loc.rst: New file.
            * doc/gfortran/intrinsic-procedures/log.rst: New file.
            * doc/gfortran/intrinsic-procedures/log10.rst: New file.
            * doc/gfortran/intrinsic-procedures/loggamma.rst: New file.
            * doc/gfortran/intrinsic-procedures/logical.rst: New file.
            * doc/gfortran/intrinsic-procedures/lshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/lstat.rst: New file.
            * doc/gfortran/intrinsic-procedures/ltime.rst: New file.
            * doc/gfortran/intrinsic-procedures/malloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskl.rst: New file.
            * doc/gfortran/intrinsic-procedures/maskr.rst: New file.
            * doc/gfortran/intrinsic-procedures/matmul.rst: New file.
            * doc/gfortran/intrinsic-procedures/max.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/maxval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/mclock8.rst: New file.
            * doc/gfortran/intrinsic-procedures/merge.rst: New file.
            * doc/gfortran/intrinsic-procedures/mergebits.rst: New file.
            * doc/gfortran/intrinsic-procedures/min.rst: New file.
            * doc/gfortran/intrinsic-procedures/minexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/minloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/minval.rst: New file.
            * doc/gfortran/intrinsic-procedures/mod.rst: New file.
            * doc/gfortran/intrinsic-procedures/modulo.rst: New file.
            * doc/gfortran/intrinsic-procedures/movealloc.rst: New file.
            * doc/gfortran/intrinsic-procedures/mvbits.rst: New file.
            * doc/gfortran/intrinsic-procedures/nearest.rst: New file.
            * doc/gfortran/intrinsic-procedures/newline.rst: New file.
            * doc/gfortran/intrinsic-procedures/nint.rst: New file.
            * doc/gfortran/intrinsic-procedures/norm2.rst: New file.
            * doc/gfortran/intrinsic-procedures/not.rst: New file.
            * doc/gfortran/intrinsic-procedures/null.rst: New file.
            * doc/gfortran/intrinsic-procedures/numimages.rst: New file.
            * doc/gfortran/intrinsic-procedures/or.rst: New file.
            * doc/gfortran/intrinsic-procedures/pack.rst: New file.
            * doc/gfortran/intrinsic-procedures/parity.rst: New file.
            * doc/gfortran/intrinsic-procedures/perror.rst: New file.
            * doc/gfortran/intrinsic-procedures/popcnt.rst: New file.
            * doc/gfortran/intrinsic-procedures/poppar.rst: New file.
            * doc/gfortran/intrinsic-procedures/precision.rst: New file.
            * doc/gfortran/intrinsic-procedures/present.rst: New file.
            * doc/gfortran/intrinsic-procedures/product.rst: New file.
            * doc/gfortran/intrinsic-procedures/radix.rst: New file.
            * doc/gfortran/intrinsic-procedures/ran.rst: New file.
            * doc/gfortran/intrinsic-procedures/rand.rst: New file.
            * doc/gfortran/intrinsic-procedures/randominit.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomnumber.rst: New file.
            * doc/gfortran/intrinsic-procedures/randomseed.rst: New file.
            * doc/gfortran/intrinsic-procedures/range.rst: New file.
            * doc/gfortran/intrinsic-procedures/rank.rst: New file.
            * doc/gfortran/intrinsic-procedures/real.rst: New file.
            * doc/gfortran/intrinsic-procedures/rename.rst: New file.
            * doc/gfortran/intrinsic-procedures/repeat.rst: New file.
            * doc/gfortran/intrinsic-procedures/reshape.rst: New file.
            * doc/gfortran/intrinsic-procedures/rrspacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/rshift.rst: New file.
            * doc/gfortran/intrinsic-procedures/sametypeas.rst: New file.
            * doc/gfortran/intrinsic-procedures/scale.rst: New file.
            * doc/gfortran/intrinsic-procedures/scan.rst: New file.
            * doc/gfortran/intrinsic-procedures/secnds.rst: New file.
            * doc/gfortran/intrinsic-procedures/second.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedcharkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedintkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/selectedrealkind.rst: New file.
            * doc/gfortran/intrinsic-procedures/setexponent.rst: New file.
            * doc/gfortran/intrinsic-procedures/shape.rst: New file.
            * doc/gfortran/intrinsic-procedures/shifta.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftl.rst: New file.
            * doc/gfortran/intrinsic-procedures/shiftr.rst: New file.
            * doc/gfortran/intrinsic-procedures/sign.rst: New file.
            * doc/gfortran/intrinsic-procedures/signal.rst: New file.
            * doc/gfortran/intrinsic-procedures/sin.rst: New file.
            * doc/gfortran/intrinsic-procedures/sind.rst: New file.
            * doc/gfortran/intrinsic-procedures/sinh.rst: New file.
            * doc/gfortran/intrinsic-procedures/size.rst: New file.
            * doc/gfortran/intrinsic-procedures/sizeof.rst: New file.
            * doc/gfortran/intrinsic-procedures/sleep.rst: New file.
            * doc/gfortran/intrinsic-procedures/spacing.rst: New file.
            * doc/gfortran/intrinsic-procedures/spread.rst: New file.
            * doc/gfortran/intrinsic-procedures/sqrt.rst: New file.
            * doc/gfortran/intrinsic-procedures/srand.rst: New file.
            * doc/gfortran/intrinsic-procedures/stat.rst: New file.
            * doc/gfortran/intrinsic-procedures/storagesize.rst: New file.
            * doc/gfortran/intrinsic-procedures/sum.rst: New file.
            * doc/gfortran/intrinsic-procedures/symlnk.rst: New file.
            * doc/gfortran/intrinsic-procedures/system.rst: New file.
            * doc/gfortran/intrinsic-procedures/systemclock.rst: New file.
            * doc/gfortran/intrinsic-procedures/tan.rst: New file.
            * doc/gfortran/intrinsic-procedures/tand.rst: New file.
            * doc/gfortran/intrinsic-procedures/tanh.rst: New file.
            * doc/gfortran/intrinsic-procedures/thisimage.rst: New file.
            * doc/gfortran/intrinsic-procedures/time.rst: New file.
            * doc/gfortran/intrinsic-procedures/time8.rst: New file.
            * doc/gfortran/intrinsic-procedures/tiny.rst: New file.
            * doc/gfortran/intrinsic-procedures/trailz.rst: New file.
            * doc/gfortran/intrinsic-procedures/transfer.rst: New file.
            * doc/gfortran/intrinsic-procedures/transpose.rst: New file.
            * doc/gfortran/intrinsic-procedures/trim.rst: New file.
            * doc/gfortran/intrinsic-procedures/ttynam.rst: New file.
            * doc/gfortran/intrinsic-procedures/ubound.rst: New file.
            * doc/gfortran/intrinsic-procedures/ucobound.rst: New file.
            * doc/gfortran/intrinsic-procedures/umask.rst: New file.
            * doc/gfortran/intrinsic-procedures/unlink.rst: New file.
            * doc/gfortran/intrinsic-procedures/unpack.rst: New file.
            * doc/gfortran/intrinsic-procedures/verify.rst: New file.
            * doc/gfortran/intrinsic-procedures/xor.rst: New file.
            * doc/gfortran/introduction.rst: New file.
            * doc/gfortran/mixed-language-programming.rst: New file.
            * doc/gfortran/naming-and-argument-passing-conventions.rst: New file.
            * doc/gfortran/non-fortran-main-program.rst: New file.
            * doc/gfortran/projects.rst: New file.
            * doc/gfortran/runtime.rst: New file.
            * doc/gfortran/runtime/gfortranconvertunit.rst: New file.
            * doc/gfortran/runtime/gfortranerrorbacktrace.rst: New file.
            * doc/gfortran/runtime/gfortranformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/gfortranlistseparator.rst: New file.
            * doc/gfortran/runtime/gfortranoptionalplus.rst: New file.
            * doc/gfortran/runtime/gfortranshowlocus.rst: New file.
            * doc/gfortran/runtime/gfortranstderrunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdinunit.rst: New file.
            * doc/gfortran/runtime/gfortranstdoutunit.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedall.rst: New file.
            * doc/gfortran/runtime/gfortranunbufferedpreconnected.rst: New file.
            * doc/gfortran/runtime/gfortranunformattedbuffersize.rst: New file.
            * doc/gfortran/runtime/tmpdir.rst: New file.
            * doc/gfortran/standards.rst: New file.
            * doc/gfortran/type-and-enum-abi-documentation.rst: New file.
    
    gcc/go/ChangeLog:
    
            * doc/c-interoperability.rst: New file.
            * doc/c-type-interoperability.rst: New file.
            * doc/compiler-directives.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/function-names.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/import-and-export.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/invoking-gccgo.rst: New file.
    
    libgomp/ChangeLog:
    
            * doc/amd-radeon-gcn.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/cuda-streams-usage.rst: New file.
            * doc/enabling-openacc.rst: New file.
            * doc/enabling-openmp.rst: New file.
            * doc/first-invocation-nvidia-cublas-library-api.rst: New file.
            * doc/first-invocation-openacc-library-api.rst: New file.
            * doc/funding.rst: New file.
            * doc/general-public-license-3.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/implementation-status-and-implementation-defined-behavior.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/memory-allocation-with-libmemkind.rst: New file.
            * doc/nvptx.rst: New file.
            * doc/offload-target-specifics.rst: New file.
            * doc/openacc-environment-variables.rst: New file.
            * doc/openacc-environment-variables/accdevicenum.rst: New file.
            * doc/openacc-environment-variables/accdevicetype.rst: New file.
            * doc/openacc-environment-variables/accproflib.rst: New file.
            * doc/openacc-environment-variables/gccaccnotify.rst: New file.
            * doc/openacc-introduction.rst: New file.
            * doc/openacc-library-and-environment-variables.rst: New file.
            * doc/openacc-library-interoperability.rst: New file.
            * doc/openacc-profiling-interface.rst: New file.
            * doc/openacc-runtime-library-routines.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctest.rst: New file.
            * doc/openacc-runtime-library-routines/accasynctestall.rst: New file.
            * doc/openacc-runtime-library-routines/accattach.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyin.rst: New file.
            * doc/openacc-runtime-library-routines/acccopyout.rst: New file.
            * doc/openacc-runtime-library-routines/acccreate.rst: New file.
            * doc/openacc-runtime-library-routines/accdelete.rst: New file.
            * doc/openacc-runtime-library-routines/accdetach.rst: New file.
            * doc/openacc-runtime-library-routines/accdeviceptr.rst: New file.
            * doc/openacc-runtime-library-routines/accfree.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudacontext.rst: New file.
            * doc/openacc-runtime-library-routines/accgetcurrentcudadevice.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accgetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accgetnumdevices.rst: New file.
            * doc/openacc-runtime-library-routines/accgetproperty.rst: New file.
            * doc/openacc-runtime-library-routines/acchostptr.rst: New file.
            * doc/openacc-runtime-library-routines/accinit.rst: New file.
            * doc/openacc-runtime-library-routines/accispresent.rst: New file.
            * doc/openacc-runtime-library-routines/accmalloc.rst: New file.
            * doc/openacc-runtime-library-routines/accmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpyfromdevice.rst: New file.
            * doc/openacc-runtime-library-routines/accmemcpytodevice.rst: New file.
            * doc/openacc-runtime-library-routines/accondevice.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcopyin.rst: New file.
            * doc/openacc-runtime-library-routines/accpresentorcreate.rst: New file.
            * doc/openacc-runtime-library-routines/accproflookup.rst: New file.
            * doc/openacc-runtime-library-routines/accprofregister.rst: New file.
            * doc/openacc-runtime-library-routines/accprofunregister.rst: New file.
            * doc/openacc-runtime-library-routines/accregisterlibrary.rst: New file.
            * doc/openacc-runtime-library-routines/accsetcudastream.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicenum.rst: New file.
            * doc/openacc-runtime-library-routines/accsetdevicetype.rst: New file.
            * doc/openacc-runtime-library-routines/accshutdown.rst: New file.
            * doc/openacc-runtime-library-routines/accunmapdata.rst: New file.
            * doc/openacc-runtime-library-routines/accupdatedevice.rst: New file.
            * doc/openacc-runtime-library-routines/accupdateself.rst: New file.
            * doc/openacc-runtime-library-routines/accwait.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitall.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitallasync.rst: New file.
            * doc/openacc-runtime-library-routines/accwaitasync.rst: New file.
            * doc/openmp-context-selectors.rst: New file.
            * doc/openmp-environment-variables.rst: New file.
            * doc/openmp-environment-variables/gompcpuaffinity.rst: New file.
            * doc/openmp-environment-variables/gompdebug.rst: New file.
            * doc/openmp-environment-variables/gomprtemsthreadpools.rst: New file.
            * doc/openmp-environment-variables/gompspincount.rst: New file.
            * doc/openmp-environment-variables/gompstacksize.rst: New file.
            * doc/openmp-environment-variables/ompcancellation.rst: New file.
            * doc/openmp-environment-variables/ompdefaultdevice.rst: New file.
            * doc/openmp-environment-variables/ompdisplayenv.rst: New file.
            * doc/openmp-environment-variables/ompdynamic.rst: New file.
            * doc/openmp-environment-variables/ompmaxactivelevels.rst: New file.
            * doc/openmp-environment-variables/ompmaxtaskpriority.rst: New file.
            * doc/openmp-environment-variables/ompnested.rst: New file.
            * doc/openmp-environment-variables/ompnumteams.rst: New file.
            * doc/openmp-environment-variables/ompnumthreads.rst: New file.
            * doc/openmp-environment-variables/ompplaces.rst: New file.
            * doc/openmp-environment-variables/ompprocbind.rst: New file.
            * doc/openmp-environment-variables/ompschedule.rst: New file.
            * doc/openmp-environment-variables/ompstacksize.rst: New file.
            * doc/openmp-environment-variables/omptargetoffload.rst: New file.
            * doc/openmp-environment-variables/ompteamsthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompthreadlimit.rst: New file.
            * doc/openmp-environment-variables/ompwaitpolicy.rst: New file.
            * doc/openmp-implementation-specifics.rst: New file.
            * doc/openmp-implementation-status.rst: New file.
            * doc/openmp-implementation-status/openmp-45.rst: New file.
            * doc/openmp-implementation-status/openmp-50.rst: New file.
            * doc/openmp-implementation-status/openmp-51.rst: New file.
            * doc/openmp-implementation-status/openmp-52.rst: New file.
            * doc/openmp-runtime-library-routines.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroylock.rst: New file.
            * doc/openmp-runtime-library-routines/ompdestroynestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompfulfillevent.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetactivelevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetancestorthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetcancellation.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdevicenum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetlevel.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxtaskpriority.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetmaxthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumdevices.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumprocs.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetprocbind.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetsupportedactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsize.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetthreadnum.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtick.rst: New file.
            * doc/openmp-runtime-library-routines/ompgetwtime.rst: New file.
            * doc/openmp-runtime-library-routines/ompinfinal.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinitnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompinparallel.rst: New file.
            * doc/openmp-runtime-library-routines/ompisinitialdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdefaultdevice.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetdynamic.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetmaxactivelevels.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnested.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumteams.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetnumthreads.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetschedule.rst: New file.
            * doc/openmp-runtime-library-routines/ompsetteamsthreadlimit.rst: New file.
            * doc/openmp-runtime-library-routines/omptestlock.rst: New file.
            * doc/openmp-runtime-library-routines/omptestnestlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetlock.rst: New file.
            * doc/openmp-runtime-library-routines/ompunsetnestlock.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/the-libgomp-abi.rst: New file.
            * doc/the-libgomp-abi/implementing-atomic-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-barrier-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-critical-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-firstprivate-lastprivate-copyin-and-copyprivate-clauses.rst:
            New file.
            * doc/the-libgomp-abi/implementing-flush-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-for-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-master-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-openaccs-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-ordered-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-parallel-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-private-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-reduction-clause.rst: New file.
            * doc/the-libgomp-abi/implementing-sections-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-single-construct.rst: New file.
            * doc/the-libgomp-abi/implementing-threadprivate-construct.rst: New file.
    
    libiberty/ChangeLog:
    
            * doc/bsd.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/extensions.rst: New file.
            * doc/function-variable-and-macro-listing.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/lesser-general-public-license-2.1.rst: New file.
            * doc/overview.rst: New file.
            * doc/replacement-functions.rst: New file.
            * doc/supplemental-functions.rst: New file.
            * doc/using.rst: New file.
    
    libitm/ChangeLog:
    
            * doc/c-c++-language-constructs-for-tm.rst: New file.
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/enabling-libitm.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/internals.rst: New file.
            * doc/locking-conventions.rst: New file.
            * doc/nesting-flat-vs-closed.rst: New file.
            * doc/the-libitm-abi.rst: New file.
            * doc/the-libitm-abi/function-list.rst: New file.
            * doc/the-libitm-abi/future-enhancements-to-the-abi.rst: New file.
            * doc/the-libitm-abi/library-design-principles.rst: New file.
            * doc/the-libitm-abi/memory-model.rst: New file.
            * doc/the-libitm-abi/non-objectives.rst: New file.
            * doc/the-libitm-abi/objectives.rst: New file.
            * doc/the-libitm-abi/sample-code.rst: New file.
            * doc/the-libitm-abi/types-and-macros-list.rst: New file.
            * doc/tm-methods-and-method-groups.rst: New file.
    
    libquadmath/ChangeLog:
    
            * doc/conf.py: New file.
            * doc/copyright.rst: New file.
            * doc/gnu-free-documentation-license.rst: New file.
            * doc/i-o-library-routines.rst: New file.
            * doc/index.rst: New file.
            * doc/indices-and-tables.rst: New file.
            * doc/introduction.rst: New file.
            * doc/math-library-routines.rst: New file.
            * doc/quadmathsnprintf.rst: New file.
            * doc/reporting-bugs.rst: New file.
            * doc/strtoflt128.rst: New file.
            * doc/typedef-and-constants.rst: New file.

Diff:
---
 doc/Makefile                                       |   97 +
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 .../gcc/language-standards-supported-by-gcc.rst    |   23 +
 .../c++-language.rst                               |   71 +
 .../c-language.rst                                 |  139 +
 .../d-language.rst                                 |   11 +
 .../go-language.rst                                |   10 +
 .../objective-c-and-objective-c++-languages.rst    |   62 +
 .../references-for-other-languages.rst             |   13 +
 gcc/doc/gcc/lto-dump.rst                           |  117 +
 .../gcc/programming-languages-supported-by-gcc.rst |   54 +
 gcc/doc/gcc/reporting-bugs.rst                     |   23 +
 .../analysis-and-optimization-of-gimple-tuples.rst |   44 +
 .../alias-analysis.rst                             |  104 +
 .../annotations.rst                                |   17 +
 .../memory-model.rst                               |   34 +
 .../ssa-operands.rst                               |  388 ++
 .../static-single-assignment.rst                   |  259 ++
 .../analysis-and-representation-of-loops.rst       |   27 +
 .../data-dependency-analysis.rst                   |  135 +
 .../iv-analysis-on-rtl.rst                         |   55 +
 .../loop-closed-ssa-form.rst                       |   47 +
 .../loop-manipulation.rst                          |   58 +
 .../loop-querying.rst                              |   81 +
 .../loop-representation.rst                        |  137 +
 .../number-of-iterations-analysis.rst              |   85 +
 .../scalar-evolutions.rst                          |   71 +
 gcc/doc/gccint/analyzer-internals.rst              |  419 ++
 gcc/doc/gccint/collect2.rst                        |   77 +
 gcc/doc/gccint/conf.py                             |   24 +
 gcc/doc/gccint/contributing-to-gcc-development.rst |    6 +
 gcc/doc/gccint/contributors-to-gcc.rst             |    6 +
 gcc/doc/gccint/control-flow-graph.rst              |   43 +
 gcc/doc/gccint/control-flow-graph/basic-blocks.rst |  141 +
 gcc/doc/gccint/control-flow-graph/edges.rst        |  241 +
 .../control-flow-graph/liveness-information.rst    |   48 +
 .../control-flow-graph/maintaining-the-cfg.rst     |  145 +
 .../control-flow-graph/profile-information.rst     |  112 +
 gcc/doc/gccint/copyright.rst                       |   25 +
 gcc/doc/gccint/debugging-the-analyzer.rst          |  141 +
 gcc/doc/gccint/funding.rst                         |    6 +
 gcc/doc/gccint/gcc-and-portability.rst             |   41 +
 gcc/doc/gccint/general-public-license-3.rst        |    6 +
 gcc/doc/gccint/generic.rst                         |   47 +
 gcc/doc/gccint/generic/attributes-in-trees.rst     |   35 +
 gcc/doc/gccint/generic/c-and-c++-trees.rst         |  886 ++++
 gcc/doc/gccint/generic/declarations.rst            |  346 ++
 gcc/doc/gccint/generic/deficiencies.rst            |   14 +
 gcc/doc/gccint/generic/expressions.rst             |  910 ++++
 gcc/doc/gccint/generic/functions.rst               |  212 +
 .../gccint/generic/language-dependent-trees.rst    |   25 +
 gcc/doc/gccint/generic/overview.rst                |  213 +
 gcc/doc/gccint/generic/statements.rst              |  516 +++
 gcc/doc/gccint/generic/types.rst                   |  299 ++
 gcc/doc/gccint/gimple-api.rst                      |   47 +
 gcc/doc/gccint/gimple.rst                          |   88 +
 .../gimple/adding-a-new-gimple-statement-code.rst  |   36 +
 .../class-hierarchy-of-gimple-statements.rst       |  150 +
 gcc/doc/gccint/gimple/exception-handling.rst       |   46 +
 gcc/doc/gccint/gimple/gimple-instruction-set.rst   |  106 +
 gcc/doc/gccint/gimple/gimple-sequences.rst         |   94 +
 .../gimple/manipulating-gimple-statements.rst      |  176 +
 gcc/doc/gccint/gimple/operands.rst                 |  319 ++
 gcc/doc/gccint/gimple/sequence-iterators.rst       |  223 +
 .../gimple/statement-and-operand-traversals.rst    |   62 +
 gcc/doc/gccint/gimple/temporaries.rst              |   43 +
 gcc/doc/gccint/gimple/tuple-representation.rst     |  242 +
 gcc/doc/gccint/gimple/tuple-specific-accessors.rst |   44 +
 .../gimple/tuple-specific-accessors/gimpleasm.rst  |   66 +
 .../tuple-specific-accessors/gimpleassign.rst      |  126 +
 .../gimple/tuple-specific-accessors/gimplebind.rst |   56 +
 .../gimple/tuple-specific-accessors/gimplecall.rst |  116 +
 .../tuple-specific-accessors/gimplecatch.rst       |   37 +
 .../gimple/tuple-specific-accessors/gimplecond.rst |   80 +
 .../tuple-specific-accessors/gimpledebug.rst       |  106 +
 .../tuple-specific-accessors/gimpleehfilter.rst    |   45 +
 .../gimple/tuple-specific-accessors/gimplegoto.rst |   21 +
 .../tuple-specific-accessors/gimplelabel.rst       |   23 +
 .../gimple/tuple-specific-accessors/gimplenop.rst  |   17 +
 .../gimpleompatomicload.rst                        |   31 +
 .../gimpleompatomicstore.rst                       |   22 +
 .../tuple-specific-accessors/gimpleompcontinue.rst |   43 +
 .../tuple-specific-accessors/gimpleompcritical.rst |   28 +
 .../tuple-specific-accessors/gimpleompfor.rst      |   97 +
 .../tuple-specific-accessors/gimpleompmaster.rst   |   14 +
 .../tuple-specific-accessors/gimpleompordered.rst  |   16 +
 .../tuple-specific-accessors/gimpleompparallel.rst |   76 +
 .../tuple-specific-accessors/gimpleompreturn.rst   |   23 +
 .../tuple-specific-accessors/gimpleompsection.rst  |   24 +
 .../tuple-specific-accessors/gimpleompsections.rst |   48 +
 .../tuple-specific-accessors/gimpleompsingle.rst   |   28 +
 .../gimple/tuple-specific-accessors/gimplephi.rst  |   41 +
 .../gimple/tuple-specific-accessors/gimpleresx.rst |   24 +
 .../tuple-specific-accessors/gimplereturn.rst      |   21 +
 .../tuple-specific-accessors/gimpleswitch.rst      |   52 +
 .../gimple/tuple-specific-accessors/gimpletry.rst  |   51 +
 .../gimplewithcleanupexpr.rst                      |   30 +
 gcc/doc/gccint/gnu-free-documentation-license.rst  |    6 +
 gcc/doc/gccint/guidelines-for-diagnostics.rst      |  598 +++
 gcc/doc/gccint/guidelines-for-options.rst          |   13 +
 gcc/doc/gccint/host-common.rst                     |   57 +
 gcc/doc/gccint/host-configuration.rst              |   32 +
 gcc/doc/gccint/host-filesystem.rst                 |  103 +
 gcc/doc/gccint/host-makefile-fragments.rst         |   14 +
 gcc/doc/gccint/host-misc.rst                       |   70 +
 gcc/doc/gccint/index.rst                           |   51 +
 gcc/doc/gccint/indices-and-tables.rst              |    1 +
 gcc/doc/gccint/interfacing-to-gcc-output.rst       |   71 +
 gcc/doc/gccint/introduction.rst                    |   26 +
 gcc/doc/gccint/language-front-ends-in-gcc.rst      |   39 +
 gcc/doc/gccint/link-time-optimization.rst          |   33 +
 .../link-time-optimization/design-overview.rst     |  123 +
 .../internal-flags-controlling-lto1.rst            |   42 +
 .../link-time-optimization/lto-file-sections.rst   |  110 +
 .../using-summary-information-in-ipa-passes.rst    |  206 +
 ...tions-linker-plugin-and-symbol-visibilities.rst |   91 +
 gcc/doc/gccint/machine-descriptions.rst            |   49 +
 .../c-statements-for-assembler-output.rst          |  122 +
 .../canonicalization-of-instructions.rst           |  152 +
 .../machine-descriptions/conditional-execution.rst |   98 +
 .../machine-descriptions/constant-definitions.rst  |  185 +
 .../defining-how-to-split-instructions.rst         |  374 ++
 .../defining-jump-instruction-patterns.rst         |   37 +
 .../defining-looping-instruction-patterns.rst      |  134 +
 .../defining-rtl-sequences-for-code-generation.rst |  206 +
 .../everything-about-instruction-patterns.rst      |  106 +
 .../machine-descriptions/example-of-defineinsn.rst |   54 +
 .../including-patterns-in-machine-descriptions.rst |   70 +
 .../instruction-attributes.rst                     | 1248 +++++
 .../interdependence-of-patterns.rst                |   43 +
 gcc/doc/gccint/machine-descriptions/iterators.rst  |  543 +++
 .../machine-specific-peephole-optimizers.rst       |  330 ++
 .../machine-descriptions/operand-constraints.rst   |  426 ++
 .../output-templates-and-operand-substitution.rst  |   99 +
 ...view-of-how-the-machine-description-is-used.rst |   47 +
 gcc/doc/gccint/machine-descriptions/predicates.rst |  343 ++
 .../gccint/machine-descriptions/rtl-template.rst   |  255 +
 .../rtl-templates-transformations.rst              |  225 +
 .../standard-pattern-names-for-generation.rst      | 3413 ++++++++++++++
 .../when-the-order-of-patterns-matters.rst         |   29 +
 gcc/doc/gccint/makefile-fragments.rst              |   37 +
 gcc/doc/gccint/match-and-simplify.rst              |   34 +
 .../memory-management-and-type-information.rst     |  103 +
 .../how-to-invoke-the-garbage-collector.rst        |   36 +
 .../marking-roots-for-the-garbage-collector.rst    |   28 +
 .../source-files-containing-type-information.rst   |   60 +
 .../support-for-inheritance.rst                    |   59 +
 ...pport-for-user-provided-gc-marking-routines.rst |  121 +
 .../the-inside-of-a-gty.rst                        |  324 ++
 .../troubleshooting-the-garbage-collector.rst      |   27 +
 gcc/doc/gccint/option-file-format.rst              |  175 +
 gcc/doc/gccint/option-properties.rst               |  376 ++
 gcc/doc/gccint/option-specification-files.rst      |   21 +
 .../gccint/passes-and-files-of-the-compiler.rst    |   27 +
 .../gimplification-pass.rst                        |   44 +
 .../inter-procedural-optimization-passes.rst       |  269 ++
 .../optimization-info.rst                          |  262 ++
 .../parsing-pass.rst                               |   80 +
 .../pass-manager.rst                               |   42 +
 .../rtl-passes.rst                                 |  275 ++
 .../tree-ssa-passes.rst                            |  477 ++
 gcc/doc/gccint/plugins.rst                         |   35 +
 gcc/doc/gccint/plugins/building-gcc-plugins.rst    |   97 +
 .../controlling-which-passes-are-being-run.rst     |   16 +
 .../plugins/giving-information-about-a-plugin.rst  |   24 +
 .../interacting-with-the-gcc-garbage-collector.rst |   37 +
 .../plugins/interacting-with-the-pass-manager.rst  |   57 +
 .../plugins/keeping-track-of-available-passes.rst  |   17 +
 gcc/doc/gccint/plugins/loading-plugins.rst         |   31 +
 gcc/doc/gccint/plugins/plugin-api.rst              |  213 +
 .../recording-information-about-pass-execution.rst |   20 +
 .../registering-custom-attributes-or-pragmas.rst   |   73 +
 gcc/doc/gccint/rtl-representation.rst              |   48 +
 .../rtl-representation/access-to-operands.rst      |   73 +
 .../access-to-special-operands.rst                 |  188 +
 .../assembler-instructions-as-expressions.rst      |   45 +
 gcc/doc/gccint/rtl-representation/bit-fields.rst   |   48 +
 .../rtl-representation/comparison-operations.rst   |  112 +
 .../constant-expression-types.rst                  |  313 ++
 gcc/doc/gccint/rtl-representation/conversions.rst  |  152 +
 gcc/doc/gccint/rtl-representation/declarations.rst |   27 +
 .../embedded-side-effects-on-addresses.rst         |  100 +
 .../flags-in-an-rtl-expression.rst                 |  447 ++
 gcc/doc/gccint/rtl-representation/insns.rst        |  624 +++
 .../gccint/rtl-representation/machine-modes.rst    |  635 +++
 .../on-the-side-ssa-form-for-rtl.rst               |  748 +++
 gcc/doc/gccint/rtl-representation/reading-rtl.rst  |   28 +
 .../rtl-representation/registers-and-memory.rst    |  451 ++
 .../rtl-representation/rtl-classes-and-formats.rst |  192 +
 .../rtl-expressions-for-arithmetic.rst             |  310 ++
 .../gccint/rtl-representation/rtl-object-types.rst |   84 +
 .../rtl-representation-of-function-call-insns.rst  |   72 +
 .../rtl-representation/side-effect-expressions.rst |  374 ++
 .../structure-sharing-assumptions.rst              |   99 +
 .../variable-location-debug-information-in-rtl.rst |   64 +
 .../rtl-representation/vector-operations.rst       |   60 +
 .../sizes-and-offsets-as-runtime-invariants.rst    |   51 +
 .../alignment-of-polyints.rst                      |   84 +
 .../arithmetic-on-polyints.rst                     |  178 +
 .../comparisons-involving-polyint.rst              |  324 ++
 .../computing-bounds-on-polyints.rst               |   34 +
 .../consequences-of-using-polyint.rst              |   55 +
 .../converting-polyints.rst                        |   91 +
 .../guidelines-for-using-polyint.rst               |  119 +
 .../miscellaneous-polyint-routines.rst             |   16 +
 .../overview-of-polyint.rst                        |   78 +
 .../source-tree-structure-and-build-system.rst     |   21 +
 .../configure-terms-and-history.rst                |   64 +
 .../the-gcc-subdirectory.rst                       |   28 +
 .../anatomy-of-a-language-front-end.rst            |  281 ++
 .../anatomy-of-a-target-back-end.rst               |  116 +
 .../build-system-in-the-gcc-directory.rst          |   14 +
 .../building-documentation.rst                     |  235 +
 .../configuration-in-the-gcc-directory.rst         |  127 +
 .../headers-installed-by-gcc.rst                   |   50 +
 ...e-files-and-headers-under-the-gcc-directory.rst |   15 +
 .../the-gcc-subdirectory/makefile-targets.rst      |  195 +
 .../the-gcc-subdirectory/subdirectories-of-gcc.rst |   55 +
 .../top-level-source-directory.rst                 |  135 +
 .../gccint/standard-header-file-directories.rst    |   35 +
 gcc/doc/gccint/static-analyzer.rst                 |   19 +
 gcc/doc/gccint/target-macros.rst                   |   60 +
 .../adding-support-for-named-address-spaces.rst    |  163 +
 gcc/doc/gccint/target-macros/addressing-modes.rst  |  824 ++++
 .../adjusting-the-instruction-scheduler.rst        |  660 +++
 .../gccint/target-macros/anchored-addresses.rst    |   92 +
 .../gccint/target-macros/c++-abi-parameters.rst    |  164 +
 .../gccint/target-macros/condition-code-status.rst |  210 +
 .../controlling-debugging-information-format.rst   |  306 ++
 .../controlling-the-compilation-driver-gcc.rst     |  482 ++
 .../cross-compilation-and-floating-point.rst       |   73 +
 gcc/doc/gccint/target-macros/d-abi-parameters.rst  |  111 +
 ...ning-coprocessor-specifics-for-mips-targets.rst |   35 +
 ...ata-structures-for-per-function-information.rst |   62 +
 .../defining-target-specific-uses-of-attribute.rst |  319 ++
 .../defining-the-output-assembler-language.rst     |   27 +
 .../assembler-commands-for-alignment.rst           |   95 +
 .../assembler-commands-for-exception-regions.rst   |  188 +
 .../how-initialization-functions-are-handled.rst   |  122 +
 .../macros-controlling-initialization-routines.rst |  182 +
 .../output-and-generation-of-labels.rst            |  586 +++
 .../output-of-assembler-instructions.rst           |  252 +
 .../output-of-data.rst                             |  191 +
 .../output-of-dispatch-tables.rst                  |  171 +
 .../output-of-uninitialized-variables.rst          |  105 +
 .../the-overall-framework-of-an-assembler-file.rst |  287 ++
 .../describing-relative-costs-of-operations.rst    |  528 +++
 ...ividing-the-output-into-sections-texts-data.rst |  445 ++
 gcc/doc/gccint/target-macros/emulating-tls.rst     |  125 +
 .../implementing-the-varargs-macros.rst            |  192 +
 .../implicit-calls-to-library-routines.rst         |  141 +
 .../layout-of-source-language-data-types.rst       |  355 ++
 .../target-macros/miscellaneous-parameters.rst     | 1718 +++++++
 .../target-macros/mode-switching-instructions.rst  |  121 +
 ...rs-for-precompiled-header-validity-checking.rst |   63 +
 .../target-macros/position-independent-code.rst    |   53 +
 gcc/doc/gccint/target-macros/register-classes.rst  |  801 ++++
 gcc/doc/gccint/target-macros/register-usage.rst    |  563 +++
 .../run-time-target-specification.rst              |  273 ++
 .../stack-layout-and-calling-conventions.rst       |   35 +
 .../basic-stack-layout.rst                         |  304 ++
 .../caller-saves-register-allocation.rst           |   21 +
 .../eliminating-frame-pointer-and-arg-pointer.rst  |  102 +
 .../exception-handling-support.rst                 |  137 +
 .../function-entry-and-exit.rst                    |  265 ++
 .../generating-code-for-profiling.rst              |   61 +
 .../how-large-values-are-returned.rst              |  132 +
 .../how-scalar-function-values-are-returned.rst    |  166 +
 .../miscellaneous-register-hooks.rst               |   26 +
 .../passing-arguments-in-registers.rst             |  633 +++
 .../passing-function-arguments-on-the-stack.rst    |  193 +
 .../permitting-tail-calls.rst                      |   60 +
 .../registers-that-address-the-stack-frame.rst     |  198 +
 .../shrink-wrapping-separate-components.rst        |   93 +
 .../specifying-how-stack-checking-is-done.rst      |  118 +
 .../stack-smashing-protection.rst                  |   75 +
 gcc/doc/gccint/target-macros/storage-layout.rst    |  729 +++
 .../target-macros/support-for-nested-functions.rst |  222 +
 .../target-macros/the-global-targetm-variable.rst  |   65 +
 gcc/doc/gccint/target-makefile-fragments.rst       |  245 +
 gcc/doc/gccint/testsuites.rst                      |   31 +
 .../gccint/testsuites/ada-language-testsuites.rst  |   38 +
 .../gccint/testsuites/c-language-testsuites.rst    |  113 +
 .../directives-used-within-dejagnu-tests.rst       |   19 +
 .../commands-for-use-in-dg-final.rst               |  291 ++
 .../features-for-dg-add-options.rst                |  122 +
 .../keywords-describing-target-attributes.rst      | 1524 ++++++
 .../selecting-targets-to-which-a-test-applies.rst  |  106 +
 .../syntax-and-descriptions-of-test-directives.rst |  311 ++
 .../variants-of-dg-require-support.rst             |   83 +
 .../testsuites/idioms-used-in-testsuite-code.rst   |   84 +
 .../support-for-testing-binary-compatibility.rst   |  109 +
 .../gccint/testsuites/support-for-testing-gcov.rst |   72 +
 .../support-for-testing-gimple-passes.rst          |   55 +
 ...support-for-testing-link-time-optimizations.rst |   46 +
 ...-for-testing-profile-directed-optimizations.rst |   51 +
 .../testsuites/support-for-testing-rtl-passes.rst  |   48 +
 ...-for-torture-testing-using-multiple-options.rst |   52 +
 .../gccint/the-gcc-low-level-runtime-library.rst   |   50 +
 ...independent-routines-for-exception-handling.rst |   42 +
 .../miscellaneous-runtime-library-routines.rst     |   59 +
 ...utines-for-decimal-floating-point-emulation.rst |  312 ++
 ...utines-for-fixed-point-fractional-emulation.rst | 1432 ++++++
 .../routines-for-floating-point-emulation.rst      |  283 ++
 .../routines-for-integer-arithmetic.rst            |  183 +
 gcc/doc/gccint/the-language.rst                    |  384 ++
 gcc/doc/gccint/user-experience-guidelines.rst      |   30 +
 gcc/doc/install/binaries.rst                       |   54 +
 gcc/doc/install/building.rst                       |   67 +
 .../install/building/building-a-cross-compiler.rst |   74 +
 .../building/building-a-native-compiler.rst        |  191 +
 gcc/doc/install/building/building-in-parallel.rst  |   15 +
 .../install/building/building-the-ada-compiler.rst |    9 +
 .../install/building/building-the-d-compiler.rst   |    9 +
 .../building/building-with-profile-feedback.rst    |   34 +
 gcc/doc/install/conf.py                            |   24 +
 gcc/doc/install/configuration.rst                  | 2098 +++++++++
 gcc/doc/install/copyright.rst                      |   24 +
 gcc/doc/install/downloading-gcc.rst                |   42 +
 gcc/doc/install/final-installation.rst             |  128 +
 gcc/doc/install/gnu-free-documentation-license.rst |    6 +
 ...-target-specific-installation-notes-for-gcc.rst | 1336 ++++++
 ...can-you-run-the-testsuite-on-selected-tests.rst |   46 +
 gcc/doc/install/how-to-interpret-test-results.rst  |   32 +
 gcc/doc/install/index.rst                          |   27 +
 gcc/doc/install/indices-and-tables.rst             |    1 +
 gcc/doc/install/installing-gcc.rst                 |   39 +
 ...ing-options-and-running-multiple-testsuites.rst |   74 +
 gcc/doc/install/prerequisites.rst                  |  319 ++
 gcc/doc/install/submitting-test-results.rst        |   22 +
 gcc/doc/install/testing.rst                        |   69 +
 .../code-that-interacts-with-the-user.rst          |   15 +
 .../doc/gfc-internals/command-line-options.rst     |   30 +
 gcc/fortran/doc/gfc-internals/conf.py              |   24 +
 gcc/fortran/doc/gfc-internals/copyright.rst        |   25 +
 gcc/fortran/doc/gfc-internals/error-handling.rst   |   75 +
 .../doc/gfc-internals/frontend-data-structures.rst |   23 +
 ...-the-intermediate-language-for-later-stages.rst |   24 +
 .../accessing-declarations.rst                     |   16 +
 .../basic-data-structures.rst                      |   67 +
 .../converting-expressions-to-tree.rst             |   48 +
 .../translating-statements.rst                     |   14 +
 gcc/fortran/doc/gfc-internals/gfccode.rst          |  146 +
 gcc/fortran/doc/gfc-internals/gfcexpr.rst          |  156 +
 .../gnu-free-documentation-license.rst             |    6 +
 gcc/fortran/doc/gfc-internals/index.rst            |   24 +
 .../doc/gfc-internals/indices-and-tables.rst       |    1 +
 .../internals-of-fortran-2003-oop-features.rst     |   15 +
 gcc/fortran/doc/gfc-internals/introduction.rst     |   32 +
 .../doc/gfc-internals/symbol-versioning.rst        |   63 +
 .../the-libgfortran-runtime-library.rst            |   14 +
 .../doc/gfc-internals/type-bound-operators.rst     |   33 +
 .../doc/gfc-internals/type-bound-procedures.rst    |  101 +
 gcc/fortran/doc/gfortran/about-gnu-fortran.rst     |  115 +
 gcc/fortran/doc/gfortran/coarray-programming.rst   |   17 +
 .../doc/gfortran/compiler-characteristics.rst      |   27 +
 .../compiler-characteristics/asynchronous-i-o.rst  |   21 +
 .../data-consistency-and-durability.rst            |   80 +
 .../evaluation-of-logical-expressions.rst          |   18 +
 ...file-format-of-unformatted-sequential-files.rst |   63 +
 .../file-operations-on-symbolic-links.rst          |   28 +
 ...pened-without-an-explicit-action=-specifier.rst |   23 +
 ...nternal-representation-of-logical-variables.rst |   24 +
 .../kind-type-parameters.rst                       |   54 +
 ...-and-min-intrinsics-with-real-nan-arguments.rst |   21 +
 .../thread-safety-of-the-runtime-library.rst       |   53 +
 gcc/fortran/doc/gfortran/conf.py                   |   30 +
 gcc/fortran/doc/gfortran/contributing.rst          |   28 +
 .../doc/gfortran/contributors-to-gnu-fortran.rst   |  109 +
 gcc/fortran/doc/gfortran/copyright.rst             |   25 +
 .../extensions-implemented-in-gnu-fortran.rst      | 1535 ++++++
 .../extensions-not-implemented-in-gnu-fortran.rst  |  186 +
 gcc/fortran/doc/gfortran/extensions.rst            |   24 +
 .../doc/gfortran/function-abi-documentation.rst    | 1526 ++++++
 gcc/fortran/doc/gfortran/funding.rst               |    6 +
 .../doc/gfortran/general-public-license-3.rst      |    6 +
 gcc/fortran/doc/gfortran/gnu-fortran-and-gcc.rst   |   48 +
 .../doc/gfortran/gnu-fortran-command-options.rst   |   33 +
 .../gnu-fortran-command-options/description.rst    |   39 +
 .../enable-and-customize-preprocessing.rst         |  298 ++
 .../environment-variables-affecting-gfortran.rst   |   24 +
 .../influencing-runtime-behavior.rst               |   67 +
 .../influencing-the-linking-step.rst               |   37 +
 .../gnu-fortran-command-options/option-summary.rst |  104 +
 .../options-controlling-fortran-dialect.rst        |  411 ++
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 gcc/go/doc/gnu-free-documentation-license.rst      |    6 +
 gcc/go/doc/import-and-export.rst                   |   50 +
 gcc/go/doc/index.rst                               |   23 +
 gcc/go/doc/indices-and-tables.rst                  |    1 +
 gcc/go/doc/introduction.rst                        |    8 +
 gcc/go/doc/invoking-gccgo.rst                      |  214 +
 libgomp/doc/amd-radeon-gcn.rst                     |   57 +
 libgomp/doc/conf.py                                |   24 +
 libgomp/doc/copyright.rst                          |   25 +
 libgomp/doc/cuda-streams-usage.rst                 |   50 +
 libgomp/doc/enabling-openacc.rst                   |   24 +
 libgomp/doc/enabling-openmp.rst                    |   22 +
 .../first-invocation-nvidia-cublas-library-api.rst |   52 +
 .../doc/first-invocation-openacc-library-api.rst   |   74 +
 libgomp/doc/funding.rst                            |    6 +
 libgomp/doc/general-public-license-3.rst           |    6 +
 libgomp/doc/gnu-free-documentation-license.rst     |    6 +
 ...-status-and-implementation-defined-behavior.rst |  281 ++
 libgomp/doc/index.rst                              |   35 +
 libgomp/doc/indices-and-tables.rst                 |    1 +
 libgomp/doc/introduction.rst                       |   25 +
 libgomp/doc/memory-allocation-with-libmemkind.rst  |   23 +
 libgomp/doc/nvptx.rst                              |   60 +
 libgomp/doc/offload-target-specifics.rst           |   17 +
 libgomp/doc/openacc-environment-variables.rst      |   23 +
 .../openacc-environment-variables/accdevicenum.rst |   13 +
 .../accdevicetype.rst                              |   13 +
 .../openacc-environment-variables/accproflib.rst   |   16 +
 .../openacc-environment-variables/gccaccnotify.rst |   12 +
 libgomp/doc/openacc-introduction.rst               |   21 +
 .../openacc-library-and-environment-variables.rst  |   30 +
 libgomp/doc/openacc-library-interoperability.rst   |   17 +
 libgomp/doc/openacc-profiling-interface.rst        |   14 +
 libgomp/doc/openacc-runtime-library-routines.rst   |   74 +
 .../accasynctest.rst                               |   36 +
 .../accasynctestall.rst                            |   34 +
 .../openacc-runtime-library-routines/accattach.rst |   25 +
 .../openacc-runtime-library-routines/acccopyin.rst |   58 +
 .../acccopyout.rst                                 |   85 +
 .../openacc-runtime-library-routines/acccreate.rst |   58 +
 .../openacc-runtime-library-routines/accdelete.rst |   85 +
 .../openacc-runtime-library-routines/accdetach.rst |   29 +
 .../accdeviceptr.rst                               |   23 +
 .../openacc-runtime-library-routines/accfree.rst   |   22 +
 .../accgetcudastream.rst                           |   23 +
 .../accgetcurrentcudacontext.rst                   |   23 +
 .../accgetcurrentcudadevice.rst                    |   23 +
 .../accgetdevicenum.rst                            |   34 +
 .../accgetdevicetype.rst                           |   36 +
 .../accgetnumdevices.rst                           |   31 +
 .../accgetproperty.rst                             |   60 +
 .../acchostptr.rst                                 |   23 +
 .../openacc-runtime-library-routines/accinit.rst   |   31 +
 .../accispresent.rst                               |   50 +
 .../openacc-runtime-library-routines/accmalloc.rst |   23 +
 .../accmapdata.rst                                 |   24 +
 .../accmemcpyfromdevice.rst                        |   24 +
 .../accmemcpytodevice.rst                          |   24 +
 .../accondevice.rst                                |   37 +
 .../accpresentorcopyin.rst                         |   58 +
 .../accpresentorcreate.rst                         |   58 +
 .../accproflookup.rst                              |   25 +
 .../accprofregister.rst                            |   25 +
 .../accprofunregister.rst                          |   25 +
 .../accregisterlibrary.rst                         |   25 +
 .../accsetcudastream.rst                           |   28 +
 .../accsetdevicenum.rst                            |   34 +
 .../accsetdevicetype.rst                           |   31 +
 .../accshutdown.rst                                |   31 +
 .../accunmapdata.rst                               |   23 +
 .../accupdatedevice.rst                            |   58 +
 .../accupdateself.rst                              |   58 +
 .../openacc-runtime-library-routines/accwait.rst   |   37 +
 .../accwaitall.rst                                 |   32 +
 .../accwaitallasync.rst                            |   32 +
 .../accwaitasync.rst                               |   31 +
 libgomp/doc/openmp-context-selectors.rst           |   28 +
 libgomp/doc/openmp-environment-variables.rst       |   39 +
 .../gompcpuaffinity.rst                            |   37 +
 .../doc/openmp-environment-variables/gompdebug.rst |   18 +
 .../gomprtemsthreadpools.rst                       |   46 +
 .../openmp-environment-variables/gompspincount.rst |   30 +
 .../openmp-environment-variables/gompstacksize.rst |   25 +
 .../ompcancellation.rst                            |   21 +
 .../ompdefaultdevice.rst                           |   24 +
 .../openmp-environment-variables/ompdisplayenv.rst |   21 +
 .../openmp-environment-variables/ompdynamic.rst    |   23 +
 .../ompmaxactivelevels.rst                         |   26 +
 .../ompmaxtaskpriority.rst                         |   25 +
 .../doc/openmp-environment-variables/ompnested.rst |   28 +
 .../openmp-environment-variables/ompnumteams.rst   |   23 +
 .../openmp-environment-variables/ompnumthreads.rst |   24 +
 .../doc/openmp-environment-variables/ompplaces.rst |   54 +
 .../openmp-environment-variables/ompprocbind.rst   |   34 +
 .../openmp-environment-variables/ompschedule.rst   |   24 +
 .../openmp-environment-variables/ompstacksize.rst  |   24 +
 .../omptargetoffload.rst                           |   27 +
 .../ompteamsthreadlimit.rst                        |   24 +
 .../ompthreadlimit.rst                             |   22 +
 .../openmp-environment-variables/ompwaitpolicy.rst |   24 +
 libgomp/doc/openmp-implementation-specifics.rst    |   15 +
 libgomp/doc/openmp-implementation-status.rst       |   21 +
 .../doc/openmp-implementation-status/openmp-45.rst |   11 +
 .../doc/openmp-implementation-status/openmp-50.rst |  212 +
 .../doc/openmp-implementation-status/openmp-51.rst |  177 +
 .../doc/openmp-implementation-status/openmp-52.rst |  132 +
 libgomp/doc/openmp-runtime-library-routines.rst    |   87 +
 .../ompdestroylock.rst                             |   33 +
 .../ompdestroynestlock.rst                         |   33 +
 .../ompfulfillevent.rst                            |   36 +
 .../ompgetactivelevel.rst                          |   31 +
 .../ompgetancestorthreadnum.rst                    |   35 +
 .../ompgetcancellation.rst                         |   33 +
 .../ompgetdefaultdevice.rst                        |   30 +
 .../ompgetdevicenum.rst                            |   33 +
 .../ompgetdynamic.rst                              |   37 +
 .../ompgetinitialdevice.rst                        |   32 +
 .../ompgetlevel.rst                                |   31 +
 .../ompgetmaxactivelevels.rst                      |   30 +
 .../ompgetmaxtaskpriority.rst                      |   29 +
 .../ompgetmaxteams.rst                             |   31 +
 .../ompgetmaxthreads.rst                           |   31 +
 .../ompgetnested.rst                               |   48 +
 .../ompgetnumdevices.rst                           |   27 +
 .../ompgetnumprocs.rst                             |   27 +
 .../ompgetnumteams.rst                             |   27 +
 .../ompgetnumthreads.rst                           |   38 +
 .../ompgetprocbind.rst                             |   34 +
 .../ompgetschedule.rst                             |   37 +
 .../ompgetsupportedactivelevels.rst                |   31 +
 .../ompgetteamnum.rst                              |   27 +
 .../ompgetteamsize.rst                             |   36 +
 .../ompgetteamsthreadlimit.rst                     |   31 +
 .../ompgetthreadlimit.rst                          |   30 +
 .../ompgetthreadnum.rst                            |   34 +
 .../ompgetwtick.rst                                |   31 +
 .../ompgetwtime.rst                                |   33 +
 .../openmp-runtime-library-routines/ompinfinal.rst |   29 +
 .../ompinitlock.rst                                |   33 +
 .../ompinitnestlock.rst                            |   33 +
 .../ompinparallel.rst                              |   29 +
 .../ompisinitialdevice.rst                         |   29 +
 .../ompsetdefaultdevice.rst                        |   33 +
 .../ompsetdynamic.rst                              |   35 +
 .../openmp-runtime-library-routines/ompsetlock.rst |   35 +
 .../ompsetmaxactivelevels.rst                      |   35 +
 .../ompsetnested.rst                               |   40 +
 .../ompsetnestlock.rst                             |   35 +
 .../ompsetnumteams.rst                             |   34 +
 .../ompsetnumthreads.rst                           |   34 +
 .../ompsetschedule.rst                             |   40 +
 .../ompsetteamsthreadlimit.rst                     |   35 +
 .../omptestlock.rst                                |   36 +
 .../omptestnestlock.rst                            |   36 +
 .../ompunsetlock.rst                               |   36 +
 .../ompunsetnestlock.rst                           |   36 +
 libgomp/doc/reporting-bugs.rst                     |   14 +
 libgomp/doc/the-libgomp-abi.rst                    |   31 +
 .../implementing-atomic-construct.rst              |   21 +
 .../implementing-barrier-construct.rst             |   13 +
 .../implementing-critical-construct.rst            |   30 +
 ...-lastprivate-copyin-and-copyprivate-clauses.rst |   45 +
 .../implementing-flush-construct.rst               |   11 +
 .../the-libgomp-abi/implementing-for-construct.rst |   73 +
 .../implementing-master-construct.rst              |   18 +
 .../implementing-openaccs-parallel-construct.rst   |   13 +
 .../implementing-ordered-construct.rst             |   14 +
 .../implementing-parallel-construct.rst            |   55 +
 .../implementing-private-clause.rst                |   17 +
 .../implementing-reduction-clause.rst              |   15 +
 .../implementing-sections-construct.rst            |   42 +
 .../implementing-single-construct.rst              |   48 +
 .../implementing-threadprivate-construct.rst       |   18 +
 libiberty/doc/bsd.rst                              |    6 +
 libiberty/doc/conf.py                              |   25 +
 libiberty/doc/copyright.rst                        |   13 +
 libiberty/doc/extensions.rst                       |  767 +++
 .../doc/function-variable-and-macro-listing.rst    | 1857 ++++++++
 libiberty/doc/index.rst                            |   23 +
 libiberty/doc/indices-and-tables.rst               |    1 +
 libiberty/doc/introduction.rst                     |    8 +
 .../doc/lesser-general-public-license-2.1.rst      |    6 +
 libiberty/doc/overview.rst                         |   20 +
 libiberty/doc/replacement-functions.rst            |   62 +
 libiberty/doc/supplemental-functions.rst           |   31 +
 libiberty/doc/using.rst                            |   40 +
 libitm/doc/c-c++-language-constructs-for-tm.rst    |   39 +
 libitm/doc/conf.py                                 |   24 +
 libitm/doc/copyright.rst                           |   13 +
 libitm/doc/enabling-libitm.rst                     |   13 +
 libitm/doc/gnu-free-documentation-license.rst      |    6 +
 libitm/doc/index.rst                               |   27 +
 libitm/doc/indices-and-tables.rst                  |    1 +
 libitm/doc/internals.rst                           |   16 +
 libitm/doc/locking-conventions.rst                 |  261 ++
 libitm/doc/nesting-flat-vs-closed.rst              |   28 +
 libitm/doc/the-libitm-abi.rst                      |   27 +
 libitm/doc/the-libitm-abi/function-list.rst        |  272 ++
 .../future-enhancements-to-the-abi.rst             |    7 +
 .../the-libitm-abi/library-design-principles.rst   |   61 +
 libitm/doc/the-libitm-abi/memory-model.rst         |   18 +
 libitm/doc/the-libitm-abi/non-objectives.rst       |    7 +
 libitm/doc/the-libitm-abi/objectives.rst           |    7 +
 libitm/doc/the-libitm-abi/sample-code.rst          |   10 +
 .../doc/the-libitm-abi/types-and-macros-list.rst   |   10 +
 libitm/doc/tm-methods-and-method-groups.rst        |   47 +
 libquadmath/doc/conf.py                            |   24 +
 libquadmath/doc/copyright.rst                      |   18 +
 libquadmath/doc/gnu-free-documentation-license.rst |    6 +
 libquadmath/doc/i-o-library-routines.rst           |   15 +
 libquadmath/doc/index.rst                          |   23 +
 libquadmath/doc/indices-and-tables.rst             |    1 +
 libquadmath/doc/introduction.rst                   |    7 +
 libquadmath/doc/math-library-routines.rst          |  104 +
 libquadmath/doc/quadmathsnprintf.rst               |   74 +
 libquadmath/doc/reporting-bugs.rst                 |   12 +
 libquadmath/doc/strtoflt128.rst                    |   40 +
 libquadmath/doc/typedef-and-constants.rst          |   43 +
 1335 files changed, 176972 insertions(+)

diff --git a/doc/Makefile b/doc/Makefile
new file mode 100644
index 00000000000..9e305a8e7da
--- /dev/null
+++ b/doc/Makefile
@@ -0,0 +1,97 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS   ?= -j auto -q
+SPHINXBUILD  ?= sphinx-build
+PAPER        ?=
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_elements.papersize=a4paper
+PAPEROPT_letter = -D latex_elements.papersize=letterpaper
+# $(O) is meant as a shortcut for $(SPHINXOPTS)
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+# the i18n builder cannot share the environment and doctrees with the others
+I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(O) $(SOURCEDIR)
+
+.PHONY: help
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html        to make standalone HTML files"
+	@echo "  dirhtml     to make HTML files named index.html in directories"
+	@echo "  singlehtml  to make a single large HTML file"
+	@echo "  pickle      to make pickle files"
+	@echo "  json        to make JSON files"
+	@echo "  htmlhelp    to make HTML files and an HTML help project"
+	@echo "  qthelp      to make HTML files and a qthelp project"
+	@echo "  applehelp   to make an Apple Help Book"
+	@echo "  devhelp     to make HTML files and a Devhelp project"
+	@echo "  epub        to make an epub"
+	@echo "  latex       to make LaTeX files (you can set PAPER=a4 or PAPER=letter)"
+	@echo "  latexpdf    to make LaTeX files and then PDFs out of them"
+	@echo "  latexpdfja  to make LaTeX files and run them through platex/dvipdfmx"
+	@echo "  lualatexpdf to make LaTeX files and run them through lualatex"
+	@echo "  xelatexpdf  to make LaTeX files and run them through xelatex"
+	@echo "  text        to make text files"
+	@echo "  man         to make manual pages"
+	@echo "  texinfo     to make Texinfo files"
+	@echo "  info        to make Texinfo files and run them through makeinfo"
+	@echo "  gettext     to make PO message catalogs"
+	@echo "  changes     to make an overview of all changed/added/deprecated items"
+	@echo "  xml         to make Docutils-native XML files"
+	@echo "  pseudoxml   to make pseudoxml-XML files for display purposes"
+	@echo "  linkcheck   to check all external links for integrity"
+	@echo "  doctest     to run all doctests embedded in the documentation (if enabled)"
+	@echo "  coverage    to run coverage check of the documentation (if enabled)"
+	@echo "  dummy       to check syntax errors of document sources"
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILDDIR)
+
+.PHONY: latexpdf
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	$(MAKE) LATEXMKOPTS="-interaction=nonstopmode -f" -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: latexpdfja
+latexpdfja:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through platex and dvipdfmx..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: lualatexpdf
+lualatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through lualatex..."
+	$(MAKE) PDFLATEX=lualatex -C $(BUILDDIR)/latex all-pdf
+	@echo "lualatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: xelatexpdf
+xelatexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through xelatex..."
+	$(MAKE) PDFLATEX=xelatex -C $(BUILDDIR)/latex all-pdf
+	@echo "xelatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: info
+info:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo "Running Texinfo files through makeinfo..."
+	make -C $(BUILDDIR)/texinfo info
+	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
+
+.PHONY: gettext
+gettext:
+	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+
+# Catch-all target: route all unknown targets to Sphinx
+.PHONY: Makefile
+%: Makefile
+	$(SPHINXBUILD) -b "$@" $(ALLSPHINXOPTS) "$(BUILDDIR)/$@"
+
diff --git a/doc/_static/custom.css b/doc/_static/custom.css
new file mode 100644
index 00000000000..1282a993e2a
--- /dev/null
+++ b/doc/_static/custom.css
@@ -0,0 +1,11 @@
+.sidebar-brand-text {
+  font-size: 13pt;
+}
+
+.literal {
+  white-space: nowrap !important;
+}
+
+.wy-nav-content {
+  max-width: initial;
+}
diff --git a/doc/baseconf.py b/doc/baseconf.py
new file mode 100644
index 00000000000..2eea8298dae
--- /dev/null
+++ b/doc/baseconf.py
@@ -0,0 +1,230 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import os
+import subprocess
+import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+# gccint needs a deeper stack limit
+sys.setrecursionlimit(2000)
+
+# -- Project information -----------------------------------------------------
+
+# The full version, including alpha/beta/rc tags
+
+# FIXME
+folder = os.path.dirname(os.path.realpath(__file__))
+gcc_srcdir = os.path.join(folder, './objdir')
+
+
+def __read_file(name):
+    path = os.path.join(gcc_srcdir, name)
+    if os.path.exists(path):
+        return open(path).read().strip()
+    else:
+        return ''
+
+
+def __get_git_revision():
+    try:
+        r = subprocess.check_output('git rev-parse --short HEAD', shell=True, encoding='utf8',
+                                    stderr=subprocess.DEVNULL)
+        return r.strip()
+    except subprocess.CalledProcessError:
+        return None
+
+
+def __get_builder_name():
+    if '-b' in sys.argv:
+        return sys.argv[sys.argv.index('-b') + 1]
+    else:
+        return None
+
+
+gcc_BASEVER = __read_file('BASE-VER')
+gcc_DEVPHASE = __read_file('DEV-PHASE')
+gcc_DATESTAMP = __read_file('DATESTAMP')
+gcc_REVISION = __read_file('REVISION')
+
+VERSION_PACKAGE = os.getenv('VERSION_PACKAGE', '(GCC)')
+BUGURL = os.getenv('BUGURL', 'https://gcc.gnu.org/bugs/')
+MONOCHROMATIC = os.getenv('MONOCHROMATIC')
+
+# The short X.Y version.
+version = gcc_BASEVER
+
+# The full version, including alpha/beta/rc tags.
+release = ('%s (%s %s%s)'
+           % (gcc_BASEVER, gcc_DEVPHASE, gcc_DATESTAMP,
+              (' %s' % gcc_REVISION) if gcc_REVISION else ''))
+
+rst_prolog = r'''
+.. |gol| raw:: latex
+
+               \\
+.. |nbsp| unicode:: 0xA0
+  :trim:
+'''
+
+needs_sphinx = '5.3'
+
+rst_epilog = '''
+.. |gcc_version| replace:: %s
+.. |package_version| replace:: %s
+.. |bugurl| replace:: %s
+.. |needs_sphinx| replace:: %s
+''' % (gcc_BASEVER, VERSION_PACKAGE, BUGURL, needs_sphinx)
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'gcc_sphinx',
+    'sphinx.ext.intersphinx',
+    'sphinx.ext.extlinks',
+    'sphinx.ext.todo',
+]
+
+if __get_builder_name() == 'html':
+    extensions.append('sphinx_copybutton')
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ['_build']
+
+# Do not highlight by default
+highlight_language = 'none'
+
+# Select C++ as a primary domain
+primary_domain = 'cpp'
+
+cpp_id_attributes = ['HOST_WIDE_INT', '__memx']
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'furo'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+html_theme_options = {
+    'navigation_with_keys': True,
+}
+
+html_logo = '../logo.svg'
+
+html_favicon = '../favicon.ico'
+
+html_last_updated_fmt = ''
+
+html_context = {
+    'commit': __get_git_revision()
+}
+
+html_static_path = [
+    '../_static'
+]
+
+html_css_files = [
+    'custom.css'
+]
+
+# By default, do not generate any manual pages
+man_pages = []
+
+# FIXME: handle WARNINGs: unknown option issues and cross refs
+suppress_warnings = [
+    'ref.option',
+]
+
+# Use xelatex by default
+latex_engine = 'xelatex'
+
+latex_logo = '../logo.pdf'
+
+latex_elements = {
+    'pointsize': '11pt',
+    'fontpkg': r'''
+\setmonofont[Scale=0.8]{DejaVu Sans Mono}
+''',
+    'preamble': r'''
+\fvset{formatcom=\let\textbf\relax}
+\protected\def\sphinxcrossref#1{#1}
+''',
+}
+
+if MONOCHROMATIC:
+    latex_elements['sphinxsetup'] = r'''
+TitleColor={black},
+InnerLinkColor={rgb}{0.0, 0.2, 0.6},
+OuterLinkColor={rgb}{0.0, 0.2, 0.6},
+'''
+
+latex_table_style = ['colorrows']
+
+texinfo_cross_references = False
+
+texinfo_elements = {'preamble': """
+@definfoenclose strong,*,*
+@definfoenclose emph,','
+"""
+}
+
+# Use default as RTD theme uses default as well
+pygments_style = 'bw' if MONOCHROMATIC else 'default'
+
+option_emphasise_placeholders = True
+
+# Ignore GitHub domain for link checking:
+# https://github.com/sphinx-doc/sphinx/issues/9016
+linkcheck_ignore = [
+    'https://github.com/.*#.*'
+]
+
+USER_LEVEL_DOCS = ('install', 'gcc', 'gfortran', 'cpp', 'gnat_rm', 'gnat_ugn',
+                   'gccgo', 'libgomp', 'libquadmath', 'libgccjit')
+INTERNAL_DOCS = ('gccint', 'cppinternals', 'gfc-internals', 'gnat-style')
+
+# Cross manual reference mapping
+intersphinx_mapping = {}
+for manual in USER_LEVEL_DOCS + INTERNAL_DOCS:
+    intersphinx_mapping[manual] = (f'https://splichal.eu/scripts/sphinx/{manual}/_build/html/', None)
+
+# Custom references
+extlinks = {
+    'P': ('https://wg21.link/p%s', 'P%s'),
+    'PR': ('https://gcc.gnu.org/PR%s', 'PR%s'),
+    'openmp': ('https://openmp.org/specifications/#%s', 'OpenMP specification v%s'),
+    'openacc': ('https://openacc.org/specification#%s', 'OpenACC specification v%s'),
+}
+
+extlinks_detect_hardcoded_links = True
+
+# Set common settings where we need NAME of the documentation
+def set_common(name, module):
+    module['tags'].add(name)
+    if gcc_DEVPHASE == 'experimental':
+        module['todo_include_todos'] = True
+        module['tags'].add('development')
+
+    html_theme_options['source_edit_link'] = f'https://splichal.eu/scripts/sphinx/{name}' \
+                                               '/_build/html/_sources/{filename}.txt'
diff --git a/doc/bsd.rst b/doc/bsd.rst
new file mode 100644
index 00000000000..6d53fa6271c
--- /dev/null
+++ b/doc/bsd.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+BSD
+===
+
+Copyright (C) 1990 Regents of the University of California.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+#. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+#. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+#. [rescinded 22 July 1999]
+
+#. Neither the name of the University nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS 'AS IS' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
\ No newline at end of file
diff --git a/doc/contrib.rst b/doc/contrib.rst
new file mode 100644
index 00000000000..273d61717b1
--- /dev/null
+++ b/doc/contrib.rst
@@ -0,0 +1,1273 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: contributors
+
+.. _contributors:
+
+Contributors to GCC
+===================
+
+The GCC project would like to thank its many contributors.  Without them the
+project would not have been nearly as successful as it has been.  Any omissions
+in this list are accidental.  Feel free to contact
+law@redhat.com or gerald@pfeifer.com if you have been left
+out or some of your contributions are not listed.  Please keep this list in
+alphabetical order.
+
+* Analog Devices helped implement the support for complex data types
+  and iterators.
+
+* John David Anglin for threading-related fixes and improvements to
+  libstdc++-v3, and the HP-UX port.
+
+* James van Artsdalen wrote the code that makes efficient use of
+  the Intel 80387 register stack.
+
+* Abramo and Roberto Bagnara for the SysV68 Motorola 3300 Delta Series
+  port.
+
+* Alasdair Baird for various bug fixes.
+
+* Giovanni Bajo for analyzing lots of complicated C++ problem reports.
+
+* Peter Barada for his work to improve code generation for new
+  ColdFire cores.
+
+* Gerald Baumgartner added the signature extension to the C++ front end.
+
+* Godmar Back for his Java improvements and encouragement.
+
+* Scott Bambrough for help porting the Java compiler.
+
+* Wolfgang Bangerth for processing tons of bug reports.
+
+* Jon Beniston for his Microsoft Windows port of Java and port to Lattice Mico32.
+
+* Daniel Berlin for better DWARF 2 support, faster/better optimizations,
+  improved alias analysis, plus migrating GCC to Bugzilla.
+
+* Geoff Berry for his Java object serialization work and various patches.
+
+* David Binderman tests weekly snapshots of GCC trunk against Fedora Rawhide
+  for several architectures.
+
+* Laurynas Biveinis for memory management work and DJGPP port fixes.
+
+* Uros Bizjak for the implementation of x87 math built-in functions and
+  for various middle end and i386 back end improvements and bug fixes.
+
+* Eric Blake for helping to make GCJ and libgcj conform to the
+  specifications.
+
+* Janne Blomqvist for contributions to GNU Fortran.
+
+* Hans-J. Boehm for his garbage collector, IA-64 libffi port, and other
+  Java work.
+
+* Segher Boessenkool for helping maintain the PowerPC port and the
+  instruction combiner plus various contributions to the middle end.
+
+* Neil Booth for work on cpplib, lang hooks, debug hooks and other
+  miscellaneous clean-ups.
+
+* Steven Bosscher for integrating the GNU Fortran front end into GCC and for
+  contributing to the tree-ssa branch.
+
+* Eric Botcazou for fixing middle- and backend bugs left and right.
+
+* Per Bothner for his direction via the steering committee and various
+  improvements to the infrastructure for supporting new languages.  Chill
+  front end implementation.  Initial implementations of
+  cpplib, fix-header, config.guess, libio, and past C++ library (libg++)
+  maintainer.  Dreaming up, designing and implementing much of GCJ.
+
+* Devon Bowen helped port GCC to the Tahoe.
+
+* Don Bowman for mips-vxworks contributions.
+
+* James Bowman for the FT32 port.
+
+* Dave Brolley for work on cpplib and Chill.
+
+* Paul Brook for work on the ARM architecture and maintaining GNU Fortran.
+
+* Robert Brown implemented the support for Encore 32000 systems.
+
+* Christian Bruel for improvements to local store elimination.
+
+* Herman A.J. ten Brugge for various fixes.
+
+* Joerg Brunsmann for Java compiler hacking and help with the GCJ FAQ.
+
+* Joe Buck for his direction via the steering committee from its creation
+  to 2013.
+
+* Iain Buclaw for the D frontend.
+
+* Craig Burley for leadership of the G77 Fortran effort.
+
+* Tobias Burnus for contributions to GNU Fortran.
+
+* Stephan Buys for contributing Doxygen notes for libstdc++.
+
+* Paolo Carlini for libstdc++ work: lots of efficiency improvements to
+  the C++ strings, streambufs and formatted I/O, hard detective work on
+  the frustrating localization issues, and keeping up with the problem reports.
+
+* John Carr for his alias work, SPARC hacking, infrastructure improvements,
+  previous contributions to the steering committee, loop optimizations, etc.
+
+* Stephane Carrez for 68HC11 and 68HC12 ports.
+
+* Steve Chamberlain for support for the Renesas SH and H8 processors
+  and the PicoJava processor, and for GCJ config fixes.
+
+* Glenn Chambers for help with the GCJ FAQ.
+
+* John-Marc Chandonia for various libgcj patches.
+
+* Denis Chertykov for contributing and maintaining the AVR port, the first GCC port
+  for an 8-bit architecture.
+
+* Kito Cheng for his work on the RISC-V port, including bringing up the test
+  suite and maintenance.
+
+* Scott Christley for his Objective-C contributions.
+
+* Eric Christopher for his Java porting help and clean-ups.
+
+* Branko Cibej for more warning contributions.
+
+* The `GNU Classpath project <https://www.gnu.org/software/classpath/>`_
+  for all of their merged runtime code.
+
+* Nick Clifton for arm, mcore, fr30, v850, m32r, msp430 rx work,
+  :option:`--help`, and other random hacking.
+
+* Michael Cook for libstdc++ cleanup patches to reduce warnings.
+
+* R. Kelley Cook for making GCC buildable from a read-only directory as
+  well as other miscellaneous build process and documentation clean-ups.
+
+* Ralf Corsepius for SH testing and minor bug fixing.
+
+* François-Xavier Coudert for contributions to GNU Fortran.
+
+* Stan Cox for care and feeding of the x86 port and lots of behind
+  the scenes hacking.
+
+* Alex Crain provided changes for the 3b1.
+
+* Ian Dall for major improvements to the NS32k port.
+
+* Paul Dale for his work to add uClinux platform support to the
+  m68k backend.
+
+* Palmer Dabbelt for his work maintaining the RISC-V port.
+
+* Dario Dariol contributed the four varieties of sample programs
+  that print a copy of their source.
+
+* Russell Davidson for fstream and stringstream fixes in libstdc++.
+
+* Bud Davis for work on the G77 and GNU Fortran compilers.
+
+* Mo DeJong for GCJ and libgcj bug fixes.
+
+* Jerry DeLisle for contributions to GNU Fortran.
+
+* DJ Delorie for the DJGPP port, build and libiberty maintenance,
+  various bug fixes, and the M32C, MeP, MSP430, and RL78 ports.
+
+* Arnaud Desitter for helping to debug GNU Fortran.
+
+* Gabriel Dos Reis for contributions to G++, contributions and
+  maintenance of GCC diagnostics infrastructure, libstdc++-v3,
+  including ``valarray<>``, ``complex<>``, maintaining the numerics library
+  (including that pesky ``<limits>`` :-) and keeping up-to-date anything
+  to do with numbers.
+
+* Ulrich Drepper for his work on glibc, testing of GCC using glibc, ISO C99
+  support, CFG dumping support, etc., plus support of the C++ runtime
+  libraries including for all kinds of C interface issues, contributing and
+  maintaining ``complex<>``, sanity checking and disbursement, configuration
+  architecture, libio maintenance, and early math work.
+
+* François Dumont for his work on libstdc++-v3, especially maintaining and
+  improving ``debug-mode`` and associative and unordered containers.
+
+* Zdenek Dvorak for a new loop unroller and various fixes.
+
+* Michael Eager for his work on the Xilinx MicroBlaze port.
+
+* Richard Earnshaw for his ongoing work with the ARM.
+
+* David Edelsohn for his direction via the steering committee, ongoing work
+  with the RS6000/PowerPC port, help cleaning up Haifa loop changes,
+  doing the entire AIX port of libstdc++ with his bare hands, and for
+  ensuring GCC properly keeps working on AIX.
+
+* Kevin Ediger for the floating point formatting of num_put::do_put in
+  libstdc++.
+
+* Phil Edwards for libstdc++ work including configuration hackery,
+  documentation maintainer, chief breaker of the web pages, the occasional
+  iostream bug fix, and work on shared library symbol versioning.
+
+* Paul Eggert for random hacking all over GCC.
+
+* Mark Elbrecht for various DJGPP improvements, and for libstdc++
+  configuration support for locales and fstream-related fixes.
+
+* Vadim Egorov for libstdc++ fixes in strings, streambufs, and iostreams.
+
+* Christian Ehrhardt for dealing with bug reports.
+
+* Ben Elliston for his work to move the Objective-C runtime into its
+  own subdirectory and for his work on autoconf.
+
+* Revital Eres for work on the PowerPC 750CL port.
+
+* Marc Espie for OpenBSD support.
+
+* Doug Evans for much of the global optimization framework, arc, m32r,
+  and SPARC work.
+
+* Christopher Faylor for his work on the Cygwin port and for caring and
+  feeding the gcc.gnu.org box and saving its users tons of spam.
+
+* Fred Fish for BeOS support and Ada fixes.
+
+* Ivan Fontes Garcia for the Portuguese translation of the GCJ FAQ.
+
+* Peter Gerwinski for various bug fixes and the Pascal front end.
+
+* Kaveh R. Ghazi for his direction via the steering committee, amazing
+  work to make :samp:`-W -Wall -W* -Werror` useful, and
+  testing GCC on a plethora of platforms.  Kaveh extends his gratitude to
+  the CAIP Center at Rutgers University for providing him with computing
+  resources to work on Free Software from the late 1980s to 2010.
+
+* John Gilmore for a donation to the FSF earmarked improving GNU Java.
+
+* Judy Goldberg for c++ contributions.
+
+* Torbjorn Granlund for various fixes and the c-torture testsuite,
+  multiply- and divide-by-constant optimization, improved long long
+  support, improved leaf function register allocation, and his direction
+  via the steering committee.
+
+* Jonny Grant for improvements to ``collect2's`` :option:`--help` documentation.
+
+* Anthony Green for his :option:`-Os` contributions, the moxie port, and
+  Java front end work.
+
+* Stu Grossman for gdb hacking, allowing GCJ developers to debug Java code.
+
+* Michael K. Gschwind contributed the port to the PDP-11.
+
+* Richard Biener for his ongoing middle-end contributions and bug fixes
+  and for release management.
+
+* Ron Guilmette implemented the :command:`protoize` and :command:`unprotoize`
+  tools, the support for DWARF 1 symbolic debugging information, and much of
+  the support for System V Release 4.  He has also worked heavily on the
+  Intel 386 and 860 support.
+
+* Sumanth Gundapaneni for contributing the CR16 port.
+
+* Mostafa Hagog for Swing Modulo Scheduling (SMS) and post reload GCSE.
+
+* Bruno Haible for improvements in the runtime overhead for EH, new
+  warnings and assorted bug fixes.
+
+* Andrew Haley for his amazing Java compiler and library efforts.
+
+* Chris Hanson assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Michael Hayes for various thankless work he's done trying to get
+  the c30/c40 ports functional.  Lots of loop and unroll improvements and
+  fixes.
+
+* Dara Hazeghi for wading through myriads of target-specific bug reports.
+
+* Kate Hedstrom for staking the G77 folks with an initial testsuite.
+
+* Richard Henderson for his ongoing SPARC, alpha, ia32, and ia64 work, loop
+  opts, and generally fixing lots of old problems we've ignored for
+  years, flow rewrite and lots of further stuff, including reviewing
+  tons of patches.
+
+* Aldy Hernandez for working on the PowerPC port, SIMD support, and
+  various fixes.
+
+* Nobuyuki Hikichi of Software Research Associates, Tokyo, contributed
+  the support for the Sony NEWS machine.
+
+* Kazu Hirata for caring and feeding the Renesas H8/300 port and various fixes.
+
+* Katherine Holcomb for work on GNU Fortran.
+
+* Manfred Hollstein for his ongoing work to keep the m88k alive, lots
+  of testing and bug fixing, particularly of GCC configury code.
+
+* Steve Holmgren for MachTen patches.
+
+* Mat Hostetter for work on the TILE-Gx and TILEPro ports.
+
+* Jan Hubicka for his x86 port improvements.
+
+* Falk Hueffner for working on C and optimization bug reports.
+
+* Bernardo Innocenti for his m68k work, including merging of
+  ColdFire improvements and uClinux support.
+
+* Christian Iseli for various bug fixes.
+
+* Kamil Iskra for general m68k hacking.
+
+* Lee Iverson for random fixes and MIPS testing.
+
+* Balaji V. Iyer for Cilk+ development and merging.
+
+* Andreas Jaeger for testing and benchmarking of GCC and various bug fixes.
+
+* Martin Jambor for his work on inter-procedural optimizations, the
+  switch conversion pass, and scalar replacement of aggregates.
+
+* Jakub Jelinek for his SPARC work and sibling call optimizations as well
+  as lots of bug fixes and test cases, and for improving the Java build
+  system.
+
+* Janis Johnson for ia64 testing and fixes, her quality improvement
+  sidetracks, and web page maintenance.
+
+* Kean Johnston for SCO OpenServer support and various fixes.
+
+* Tim Josling for the sample language treelang based originally on Richard
+  Kenner's 'toy' language.
+
+* Nicolai Josuttis for additional libstdc++ documentation.
+
+* Klaus Kaempf for his ongoing work to make alpha-vms a viable target.
+
+* Steven G. Kargl for work on GNU Fortran.
+
+* David Kashtan of SRI adapted GCC to VMS.
+
+* Ryszard Kabatek for many, many libstdc++ bug fixes and optimizations of
+  strings, especially member functions, and for auto_ptr fixes.
+
+* Geoffrey Keating for his ongoing work to make the PPC work for GNU/Linux
+  and his automatic regression tester.
+
+* Brendan Kehoe for his ongoing work with G++ and for a lot of early work
+  in just about every part of libstdc++.
+
+* Oliver M. Kellogg of Deutsche Aerospace contributed the port to the
+  MIL-STD-1750A.
+
+* Richard Kenner of the New York University Ultracomputer Research
+  Laboratory wrote the machine descriptions for the AMD 29000, the DEC
+  Alpha, the IBM RT PC, and the IBM RS/6000 as well as the support for
+  instruction attributes.  He also made changes to better support RISC
+  processors including changes to common subexpression elimination,
+  strength reduction, function calling sequence handling, and condition
+  code support, in addition to generalizing the code for frame pointer
+  elimination and delay slot scheduling.  Richard Kenner was also the
+  head maintainer of GCC for several years.
+
+* Mumit Khan for various contributions to the Cygwin and Mingw32 ports and
+  maintaining binary releases for Microsoft Windows hosts, and for massive libstdc++
+  porting work to Cygwin/Mingw32.
+
+* Robin Kirkham for cpu32 support.
+
+* Mark Klein for PA improvements.
+
+* Thomas Koenig for various bug fixes.
+
+* Bruce Korb for the new and improved fixincludes code.
+
+* Benjamin Kosnik for his G++ work and for leading the libstdc++-v3 effort.
+
+* Maxim Kuvyrkov for contributions to the instruction scheduler, the Android
+  and m68k/Coldfire ports, and optimizations.
+
+* Charles LaBrec contributed the support for the Integrated Solutions
+  68020 system.
+
+* Asher Langton and Mike Kumbera for contributing Cray pointer support
+  to GNU Fortran, and for other GNU Fortran improvements.
+
+* Jeff Law for his direction via the steering committee, coordinating the
+  entire egcs project and GCC 2.95, rolling out snapshots and releases,
+  handling merges from GCC2, reviewing tons of patches that might have
+  fallen through the cracks else, and random but extensive hacking.
+
+* Walter Lee for work on the TILE-Gx and TILEPro ports.
+
+* Marc Lehmann for his direction via the steering committee and helping
+  with analysis and improvements of x86 performance.
+
+* Victor Leikehman for work on GNU Fortran.
+
+* Ted Lemon wrote parts of the RTL reader and printer.
+
+* Kriang Lerdsuwanakij for C++ improvements including template as template
+  parameter support, and many C++ fixes.
+
+* Warren Levy for tremendous work on libgcj (Java Runtime Library) and
+  random work on the Java front end.
+
+* Alain Lichnewsky ported GCC to the MIPS CPU.
+
+* Oskar Liljeblad for hacking on AWT and his many Java bug reports and
+  patches.
+
+* Robert Lipe for OpenServer support, new testsuites, testing, etc.
+
+* Chen Liqin for various S+core related fixes/improvement, and for
+  maintaining the S+core port.
+
+* Martin Liska for his work on identical code folding, the sanitizers,
+  HSA, general bug fixing and for running automated regression testing of GCC
+  and reporting numerous bugs.
+
+* Weiwen Liu for testing and various bug fixes.
+
+* Manuel López-Ibáñez for improving :option:`-Wconversion` and
+  many other diagnostics fixes and improvements.
+
+* Dave Love for his ongoing work with the Fortran front end and
+  runtime libraries.
+
+* Martin von Löwis for internal consistency checking infrastructure,
+  various C++ improvements including namespace support, and tons of
+  assistance with libstdc++/compiler merges.
+
+* H.J. Lu for his previous contributions to the steering committee, many x86
+  bug reports, prototype patches, and keeping the GNU/Linux ports working.
+
+* Greg McGary for random fixes and (someday) bounded pointers.
+
+* Andrew MacLeod for his ongoing work in building a real EH system,
+  various code generation improvements, work on the global optimizer, etc.
+
+* Vladimir Makarov for hacking some ugly i960 problems, PowerPC hacking
+  improvements to compile-time performance, overall knowledge and
+  direction in the area of instruction scheduling, design and
+  implementation of the automaton based instruction scheduler and
+  design and implementation of the integrated and local register allocators.
+
+* David Malcolm for his work on improving GCC diagnostics, JIT, self-tests
+  and unit testing.
+
+* Bob Manson for his behind the scenes work on dejagnu.
+
+* John Marino for contributing the DragonFly BSD port.
+
+* Philip Martin for lots of libstdc++ string and vector iterator fixes and
+  improvements, and string clean up and testsuites.
+
+* Michael Matz for his work on dominance tree discovery, the x86-64 port,
+  link-time optimization framework and general optimization improvements.
+
+* All of the Mauve project contributors for Java test code.
+
+* Bryce McKinlay for numerous GCJ and libgcj fixes and improvements.
+
+* Adam Megacz for his work on the Microsoft Windows port of GCJ.
+
+* Michael Meissner for LRS framework, ia32, m32r, v850, m88k, MIPS,
+  powerpc, haifa, ECOFF debug support, and other assorted hacking.
+
+* Jason Merrill for his direction via the steering committee and leading
+  the G++ effort.
+
+* Martin Michlmayr for testing GCC on several architectures using the
+  entire Debian archive.
+
+* David Miller for his direction via the steering committee, lots of
+  SPARC work, improvements in jump.cc and interfacing with the Linux kernel
+  developers.
+
+* Gary Miller ported GCC to Charles River Data Systems machines.
+
+* Alfred Minarik for libstdc++ string and ios bug fixes, and turning the
+  entire libstdc++ testsuite namespace-compatible.
+
+* Mark Mitchell for his direction via the steering committee, mountains of
+  C++ work, load/store hoisting out of loops, alias analysis improvements,
+  ISO C ``restrict`` support, and serving as release manager from 2000
+  to 2011.
+
+* Alan Modra for various GNU/Linux bits and testing.
+
+* Toon Moene for his direction via the steering committee, Fortran
+  maintenance, and his ongoing work to make us make Fortran run fast.
+
+* Jason Molenda for major help in the care and feeding of all the services
+  on the gcc.gnu.org (formerly egcs.cygnus.com) machine---mail, web
+  services, ftp services, etc etc.  Doing all this work on scrap paper and
+  the backs of envelopes would have been... difficult.
+
+* Catherine Moore for fixing various ugly problems we have sent her
+  way, including the haifa bug which was killing the Alpha & PowerPC
+  Linux kernels.
+
+* Mike Moreton for his various Java patches.
+
+* David Mosberger-Tang for various Alpha improvements, and for the initial
+  IA-64 port.
+
+* Stephen Moshier contributed the floating point emulator that assists in
+  cross-compilation and permits support for floating point numbers wider
+  than 64 bits and for ISO C99 support.
+
+* Bill Moyer for his behind the scenes work on various issues.
+
+* Philippe De Muyter for his work on the m68k port.
+
+* Joseph S. Myers for his work on the PDP-11 port, format checking and ISO
+  C99 support, and continuous emphasis on (and contributions to) documentation.
+
+* Nathan Myers for his work on libstdc++-v3: architecture and authorship
+  through the first three snapshots, including implementation of locale
+  infrastructure, string, shadow C headers, and the initial project
+  documentation (DESIGN, CHECKLIST, and so forth).  Later, more work on
+  MT-safe string and shadow headers.
+
+* Felix Natter for documentation on porting libstdc++.
+
+* Nathanael Nerode for cleaning up the configuration/build process.
+
+* NeXT, Inc. donated the front end that supports the Objective-C
+  language.
+
+* Hans-Peter Nilsson for the CRIS and MMIX ports, improvements to the search
+  engine setup, various documentation fixes and other small fixes.
+
+* Geoff Noer for his work on getting cygwin native builds working.
+
+* Vegard Nossum for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Diego Novillo for his work on Tree SSA, OpenMP, SPEC performance
+  tracking web pages, GIMPLE tuples, and assorted fixes.
+
+* David O'Brien for the FreeBSD/alpha, FreeBSD/AMD x86-64, FreeBSD/ARM,
+  FreeBSD/PowerPC, and FreeBSD/SPARC64 ports and related infrastructure
+  improvements.
+
+* Alexandre Oliva for various build infrastructure improvements, scripts and
+  amazing testing work, including keeping libtool issues sane and happy.
+
+* Stefan Olsson for work on mt_alloc.
+
+* Melissa O'Neill for various NeXT fixes.
+
+* Rainer Orth for random MIPS work, including improvements to GCC's o32
+  ABI support, improvements to dejagnu's MIPS support, Java configuration
+  clean-ups and porting work, and maintaining the IRIX, Solaris 2, and
+  Tru64 UNIX ports.
+
+* Steven Pemberton for his contribution of :samp:`enquire` which allowed GCC to
+  determine various properties of the floating point unit and generate
+  :samp:`float.h` in older versions of GCC.
+
+* Hartmut Penner for work on the s390 port.
+
+* Paul Petersen wrote the machine description for the Alliant FX/8.
+
+* Alexandre Petit-Bianco for implementing much of the Java compiler and
+  continued Java maintainership.
+
+* Matthias Pfaller for major improvements to the NS32k port.
+
+* Gerald Pfeifer for his direction via the steering committee, pointing
+  out lots of problems we need to solve, maintenance of the web pages, and
+  taking care of documentation maintenance in general.
+
+* Marek Polacek for his work on the C front end, the sanitizers and general
+  bug fixing.
+
+* Andrew Pinski for processing bug reports by the dozen.
+
+* Ovidiu Predescu for his work on the Objective-C front end and runtime
+  libraries.
+
+* Jerry Quinn for major performance improvements in C++ formatted I/O.
+
+* Ken Raeburn for various improvements to checker, MIPS ports and various
+  cleanups in the compiler.
+
+* Rolf W. Rasmussen for hacking on AWT.
+
+* David Reese of Sun Microsystems contributed to the Solaris on PowerPC
+  port.
+
+* John Regehr for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Volker Reichelt for running automated regression testing of GCC and reporting
+  numerous bugs and for keeping up with the problem reports.
+
+* Joern Rennecke for maintaining the sh port, loop, regmove & reload
+  hacking and developing and maintaining the Epiphany port.
+
+* Loren J. Rittle for improvements to libstdc++-v3 including the FreeBSD
+  port, threading fixes, thread-related configury changes, critical
+  threading documentation, and solutions to really tricky I/O problems,
+  as well as keeping GCC properly working on FreeBSD and continuous testing.
+
+* Craig Rodrigues for processing tons of bug reports.
+
+* Ola Rönnerup for work on mt_alloc.
+
+* Gavin Romig-Koch for lots of behind the scenes MIPS work.
+
+* David Ronis inspired and encouraged Craig to rewrite the G77
+  documentation in texinfo format by contributing a first pass at a
+  translation of the old :samp:`g77-0.5.16/f/DOC` file.
+
+* Ken Rose for fixes to GCC's delay slot filling code.
+
+* Ira Rosen for her contributions to the auto-vectorizer.
+
+* Paul Rubin wrote most of the preprocessor.
+
+* Pétur Runólfsson for major performance improvements in C++ formatted I/O and
+  large file support in C++ filebuf.
+
+* Chip Salzenberg for libstdc++ patches and improvements to locales, traits,
+  Makefiles, libio, libtool hackery, and 'long long' support.
+
+* Juha Sarlin for improvements to the H8 code generator.
+
+* Greg Satz assisted in making GCC work on HP-UX for the 9000 series 300.
+
+* Roger Sayle for improvements to constant folding and GCC's RTL optimizers
+  as well as for fixing numerous bugs.
+
+* Bradley Schatz for his work on the GCJ FAQ.
+
+* Peter Schauer wrote the code to allow debugging to work on the Alpha.
+
+* William Schelter did most of the work on the Intel 80386 support.
+
+* Tobias Schlüter for work on GNU Fortran.
+
+* Bernd Schmidt for various code generation improvements and major
+  work in the reload pass, serving as release manager for
+  GCC 2.95.3, and work on the Blackfin and C6X ports.
+
+* Peter Schmid for constant testing of libstdc++---especially application
+  testing, going above and beyond what was requested for the release
+  criteria---and libstdc++ header file tweaks.
+
+* Jason Schroeder for jcf-dump patches.
+
+* Andreas Schwab for his work on the m68k port.
+
+* Lars Segerlund for work on GNU Fortran.
+
+* Dodji Seketeli for numerous C++ bug fixes and debug info improvements.
+
+* Tim Shen for major work on ``<regex>``.
+
+* Joel Sherrill for his direction via the steering committee, RTEMS
+  contributions and RTEMS testing.
+
+* Nathan Sidwell for many C++ fixes/improvements.
+
+* Jeffrey Siegal for helping RMS with the original design of GCC, some
+  code which handles the parse tree and RTL data structures, constant
+  folding and help with the original VAX & m68k ports.
+
+* Kenny Simpson for prompting libstdc++ fixes due to defect reports from
+  the LWG (thereby keeping GCC in line with updates from the ISO).
+
+* Franz Sirl for his ongoing work with making the PPC port stable
+  for GNU/Linux.
+
+* Andrey Slepuhin for assorted AIX hacking.
+
+* Trevor Smigiel for contributing the SPU port.
+
+* Christopher Smith did the port for Convex machines.
+
+* Danny Smith for his major efforts on the Mingw (and Cygwin) ports.
+  Retired from GCC maintainership August 2010, having mentored two
+  new maintainers into the role.
+
+* Randy Smith finished the Sun FPA support.
+
+* Ed Smith-Rowland for his continuous work on libstdc++-v3, special functions,
+  ``<random>``, and various improvements to C++11 features.
+
+* Scott Snyder for queue, iterator, istream, and string fixes and libstdc++
+  testsuite entries.  Also for providing the patch to G77 to add
+  rudimentary support for ``INTEGER*1``, ``INTEGER*2``, and
+  ``LOGICAL*1``.
+
+* Zdenek Sojka for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Arseny Solokha for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Jayant Sonar for contributing the CR16 port.
+
+* Brad Spencer for contributions to the GLIBCPP_FORCE_NEW technique.
+
+* Richard Stallman, for writing the original GCC and launching the GNU project.
+
+* Jan Stein of the Chalmers Computer Society provided support for
+  Genix, as well as part of the 32000 machine description.
+
+* Gerhard Steinmetz for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Nigel Stephens for various mips16 related fixes/improvements.
+
+* Jonathan Stone wrote the machine description for the Pyramid computer.
+
+* Graham Stott for various infrastructure improvements.
+
+* John Stracke for his Java HTTP protocol fixes.
+
+* Mike Stump for his Elxsi port, G++ contributions over the years and more
+  recently his vxworks contributions
+
+* Jeff Sturm for Java porting help, bug fixes, and encouragement.
+
+* Zhendong Su for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Chengnian Sun for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Shigeya Suzuki for this fixes for the bsdi platforms.
+
+* Ian Lance Taylor for the Go frontend, the initial mips16 and mips64
+  support, general configury hacking, fixincludes, etc.
+
+* Holger Teutsch provided the support for the Clipper CPU.
+
+* Gary Thomas for his ongoing work to make the PPC work for GNU/Linux.
+
+* Paul Thomas for contributions to GNU Fortran.
+
+* Philipp Thomas for random bug fixes throughout the compiler
+
+* Jason Thorpe for thread support in libstdc++ on NetBSD.
+
+* Kresten Krab Thorup wrote the run time support for the Objective-C
+  language and the fantastic Java bytecode interpreter.
+
+* Michael Tiemann for random bug fixes, the first instruction scheduler,
+  initial C++ support, function integration, NS32k, SPARC and M88k
+  machine description work, delay slot scheduling.
+
+* Andreas Tobler for his work porting libgcj to Darwin.
+
+* Teemu Torma for thread safe exception handling support.
+
+* Leonard Tower wrote parts of the parser, RTL generator, and RTL
+  definitions, and of the VAX machine description.
+
+* Daniel Towner and Hariharan Sandanagobalane contributed and
+  maintain the picoChip port.
+
+* Tom Tromey for internationalization support and for his many Java
+  contributions and libgcj maintainership.
+
+* Lassi Tuura for improvements to config.guess to determine HP processor
+  types.
+
+* Petter Urkedal for libstdc++ CXXFLAGS, math, and algorithms fixes.
+
+* Andy Vaught for the design and initial implementation of the GNU Fortran
+  front end.
+
+* Brent Verner for work with the libstdc++ cshadow files and their
+  associated configure steps.
+
+* Todd Vierling for contributions for NetBSD ports.
+
+* Andrew Waterman for contributing the RISC-V port, as well as maintaining it.
+
+* Jonathan Wakely for contributing libstdc++ Doxygen notes and XHTML
+  guidance and maintaining libstdc++.
+
+* Dean Wakerley for converting the install documentation from HTML to texinfo
+  in time for GCC 3.0.
+
+* Krister Walfridsson for random bug fixes.
+
+* Feng Wang for contributions to GNU Fortran.
+
+* Stephen M. Webb for time and effort on making libstdc++ shadow files
+  work with the tricky Solaris 8+ headers, and for pushing the build-time
+  header tree. Also, for starting and driving the ``<regex>`` effort.
+
+* John Wehle for various improvements for the x86 code generator,
+  related infrastructure improvements to help x86 code generation,
+  value range propagation and other work, WE32k port.
+
+* Ulrich Weigand for work on the s390 port.
+
+* Janus Weil for contributions to GNU Fortran.
+
+* Zack Weinberg for major work on cpplib and various other bug fixes.
+
+* Matt Welsh for help with Linux Threads support in GCJ.
+
+* Urban Widmark for help fixing java.io.
+
+* Mark Wielaard for new Java library code and his work integrating with
+  Classpath.
+
+* Dale Wiles helped port GCC to the Tahoe.
+
+* Bob Wilson from Tensilica, Inc. for the Xtensa port.
+
+* Jim Wilson for his direction via the steering committee, tackling hard
+  problems in various places that nobody else wanted to work on, strength
+  reduction and other loop optimizations.
+
+* Paul Woegerer and Tal Agmon for the CRX port.
+
+* Carlo Wood for various fixes.
+
+* Tom Wood for work on the m88k port.
+
+* Chung-Ju Wu for his work on the Andes NDS32 port.
+
+* Canqun Yang for work on GNU Fortran.
+
+* Masanobu Yuhara of Fujitsu Laboratories implemented the machine
+  description for the Tron architecture (specifically, the Gmicro).
+
+* Kevin Zachmann helped port GCC to the Tahoe.
+
+* Ayal Zaks for Swing Modulo Scheduling (SMS).
+
+* Qirun Zhang for running automated regression testing of GCC and reporting
+  numerous bugs.
+
+* Xiaoqiang Zhang for work on GNU Fortran.
+
+* Gilles Zunino for help porting Java to Irix.
+
+The following people are recognized for their contributions to GNAT,
+the Ada front end of GCC:
+
+* Bernard Banner
+
+* Romain Berrendonner
+
+* Geert Bosch
+
+* Emmanuel Briot
+
+* Joel Brobecker
+
+* Ben Brosgol
+
+* Vincent Celier
+
+* Arnaud Charlet
+
+* Chien Chieng
+
+* Cyrille Comar
+
+* Cyrille Crozes
+
+* Robert Dewar
+
+* Gary Dismukes
+
+* Robert Duff
+
+* Ed Falis
+
+* Ramon Fernandez
+
+* Sam Figueroa
+
+* Vasiliy Fofanov
+
+* Michael Friess
+
+* Franco Gasperoni
+
+* Ted Giering
+
+* Matthew Gingell
+
+* Laurent Guerby
+
+* Jerome Guitton
+
+* Olivier Hainque
+
+* Jerome Hugues
+
+* Hristian Kirtchev
+
+* Jerome Lambourg
+
+* Bruno Leclerc
+
+* Albert Lee
+
+* Sean McNeil
+
+* Javier Miranda
+
+* Laurent Nana
+
+* Pascal Obry
+
+* Dong-Ik Oh
+
+* Laurent Pautet
+
+* Brett Porter
+
+* Thomas Quinot
+
+* Nicolas Roche
+
+* Pat Rogers
+
+* Jose Ruiz
+
+* Douglas Rupp
+
+* Sergey Rybin
+
+* Gail Schenker
+
+* Ed Schonberg
+
+* Nicolas Setton
+
+* Samuel Tardieu
+
+The following people are recognized for their contributions of new
+features, bug reports, testing and integration of classpath/libgcj for
+GCC version 4.1:
+
+* Lillian Angel for ``JTree`` implementation and lots Free Swing
+  additions and bug fixes.
+
+* Wolfgang Baer for ``GapContent`` bug fixes.
+
+* Anthony Balkissoon for ``JList``, Free Swing 1.5 updates and mouse event
+  fixes, lots of Free Swing work including ``JTable`` editing.
+
+* Stuart Ballard for RMI constant fixes.
+
+* Goffredo Baroncelli for ``HTTPURLConnection`` fixes.
+
+* Gary Benson for ``MessageFormat`` fixes.
+
+* Daniel Bonniot for ``Serialization`` fixes.
+
+* Chris Burdess for lots of gnu.xml and http protocol fixes, ``StAX``
+  and ``DOM xml:id`` support.
+
+* Ka-Hing Cheung for ``TreePath`` and ``TreeSelection`` fixes.
+
+* Archie Cobbs for build fixes, VM interface updates,
+  ``URLClassLoader`` updates.
+
+* Kelley Cook for build fixes.
+
+* Martin Cordova for Suggestions for better ``SocketTimeoutException``.
+
+* David Daney for ``BitSet`` bug fixes, ``HttpURLConnection``
+  rewrite and improvements.
+
+* Thomas Fitzsimmons for lots of upgrades to the gtk+ AWT and Cairo 2D
+  support. Lots of imageio framework additions, lots of AWT and Free
+  Swing bug fixes.
+
+* Jeroen Frijters for ``ClassLoader`` and nio cleanups, serialization fixes,
+  better ``Proxy`` support, bug fixes and IKVM integration.
+
+* Santiago Gala for ``AccessControlContext`` fixes.
+
+* Nicolas Geoffray for ``VMClassLoader`` and ``AccessController``
+  improvements.
+
+* David Gilbert for ``basic`` and ``metal`` icon and plaf support
+  and lots of documenting, Lots of Free Swing and metal theme
+  additions. ``MetalIconFactory`` implementation.
+
+* Anthony Green for ``MIDI`` framework, ``ALSA`` and ``DSSI``
+  providers.
+
+* Andrew Haley for ``Serialization`` and ``URLClassLoader`` fixes,
+  gcj build speedups.
+
+* Kim Ho for ``JFileChooser`` implementation.
+
+* Andrew John Hughes for ``Locale`` and net fixes, URI RFC2986
+  updates, ``Serialization`` fixes, ``Properties`` XML support and
+  generic branch work, VMIntegration guide update.
+
+* Bastiaan Huisman for ``TimeZone`` bug fixing.
+
+* Andreas Jaeger for mprec updates.
+
+* Paul Jenner for better :option:`-Werror` support.
+
+* Ito Kazumitsu for ``NetworkInterface`` implementation and updates.
+
+* Roman Kennke for ``BoxLayout``, ``GrayFilter`` and
+  ``SplitPane``, plus bug fixes all over. Lots of Free Swing work
+  including styled text.
+
+* Simon Kitching for ``String`` cleanups and optimization suggestions.
+
+* Michael Koch for configuration fixes, ``Locale`` updates, bug and
+  build fixes.
+
+* Guilhem Lavaux for configuration, thread and channel fixes and Kaffe
+  integration. JCL native ``Pointer`` updates. Logger bug fixes.
+
+* David Lichteblau for JCL support library global/local reference
+  cleanups.
+
+* Aaron Luchko for JDWP updates and documentation fixes.
+
+* Ziga Mahkovec for ``Graphics2D`` upgraded to Cairo 0.5 and new regex
+  features.
+
+* Sven de Marothy for BMP imageio support, CSS and ``TextLayout``
+  fixes. ``GtkImage`` rewrite, 2D, awt, free swing and date/time fixes and
+  implementing the Qt4 peers.
+
+* Casey Marshall for crypto algorithm fixes, ``FileChannel`` lock,
+  ``SystemLogger`` and ``FileHandler`` rotate implementations, NIO
+  ``FileChannel.map`` support, security and policy updates.
+
+* Bryce McKinlay for RMI work.
+
+* Audrius Meskauskas for lots of Free Corba, RMI and HTML work plus
+  testing and documenting.
+
+* Kalle Olavi Niemitalo for build fixes.
+
+* Rainer Orth for build fixes.
+
+* Andrew Overholt for ``File`` locking fixes.
+
+* Ingo Proetel for ``Image``, ``Logger`` and ``URLClassLoader``
+  updates.
+
+* Olga Rodimina for ``MenuSelectionManager`` implementation.
+
+* Jan Roehrich for ``BasicTreeUI`` and ``JTree`` fixes.
+
+* Julian Scheid for documentation updates and gjdoc support.
+
+* Christian Schlichtherle for zip fixes and cleanups.
+
+* Robert Schuster for documentation updates and beans fixes,
+  ``TreeNode`` enumerations and ``ActionCommand`` and various
+  fixes, XML and URL, AWT and Free Swing bug fixes.
+
+* Keith Seitz for lots of JDWP work.
+
+* Christian Thalinger for 64-bit cleanups, Configuration and VM
+  interface fixes and ``CACAO`` integration, ``fdlibm`` updates.
+
+* Gael Thomas for ``VMClassLoader`` boot packages support suggestions.
+
+* Andreas Tobler for Darwin and Solaris testing and fixing, ``Qt4``
+  support for Darwin/OS X, ``Graphics2D`` support, ``gtk+``
+  updates.
+
+* Dalibor Topic for better ``DEBUG`` support, build cleanups and
+  Kaffe integration. ``Qt4`` build infrastructure, ``SHA1PRNG``
+  and ``GdkPixbugDecoder`` updates.
+
+* Tom Tromey for Eclipse integration, generics work, lots of bug fixes
+  and gcj integration including coordinating The Big Merge.
+
+* Mark Wielaard for bug fixes, packaging and release management,
+  ``Clipboard`` implementation, system call interrupts and network
+  timeouts and ``GdkPixpufDecoder`` fixes.
+
+In addition to the above, all of which also contributed time and energy in
+testing GCC, we would like to thank the following for their contributions
+to testing:
+
+* Michael Abd-El-Malek
+
+* Thomas Arend
+
+* Bonzo Armstrong
+
+* Steven Ashe
+
+* Chris Baldwin
+
+* David Billinghurst
+
+* Jim Blandy
+
+* Stephane Bortzmeyer
+
+* Horst von Brand
+
+* Frank Braun
+
+* Rodney Brown
+
+* Sidney Cadot
+
+* Bradford Castalia
+
+* Robert Clark
+
+* Jonathan Corbet
+
+* Ralph Doncaster
+
+* Richard Emberson
+
+* Levente Farkas
+
+* Graham Fawcett
+
+* Mark Fernyhough
+
+* Robert A. French
+
+* Jörgen Freyh
+
+* Mark K. Gardner
+
+* Charles-Antoine Gauthier
+
+* Yung Shing Gene
+
+* David Gilbert
+
+* Simon Gornall
+
+* Fred Gray
+
+* John Griffin
+
+* Patrik Hagglund
+
+* Phil Hargett
+
+* Amancio Hasty
+
+* Takafumi Hayashi
+
+* Bryan W. Headley
+
+* Kevin B. Hendricks
+
+* Joep Jansen
+
+* Christian Joensson
+
+* Michel Kern
+
+* David Kidd
+
+* Tobias Kuipers
+
+* Anand Krishnaswamy
+
+* A.O.V. Le Blanc
+
+* llewelly
+
+* Damon Love
+
+* Brad Lucier
+
+* Matthias Klose
+
+* Martin Knoblauch
+
+* Rick Lutowski
+
+* Jesse Macnish
+
+* Stefan Morrell
+
+* Anon A. Mous
+
+* Matthias Mueller
+
+* Pekka Nikander
+
+* Rick Niles
+
+* Jon Olson
+
+* Magnus Persson
+
+* Chris Pollard
+
+* Richard Polton
+
+* Derk Reefman
+
+* David Rees
+
+* Paul Reilly
+
+* Tom Reilly
+
+* Torsten Rueger
+
+* Danny Sadinoff
+
+* Marc Schifer
+
+* Erik Schnetter
+
+* Wayne K. Schroll
+
+* David Schuler
+
+* Vin Shelton
+
+* Tim Souder
+
+* Adam Sulmicki
+
+* Bill Thorson
+
+* George Talbot
+
+* Pedro A. M. Vazquez
+
+* Gregory Warnes
+
+* Ian Watson
+
+* David E. Young
+
+* And many others
+
+And finally we'd like to thank everyone who uses the compiler, provides
+feedback and generally reminds us why we're doing this work in the first
+place.
\ No newline at end of file
diff --git a/doc/contribute.rst b/doc/contribute.rst
new file mode 100644
index 00000000000..643562efc63
--- /dev/null
+++ b/doc/contribute.rst
@@ -0,0 +1,21 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _contributing:
+
+Contributing to GCC Development
+-------------------------------
+
+If you would like to help pretest GCC releases to assure they work well,
+current development sources are available via Git (see
+https://gcc.gnu.org/git.html).  Source and binary snapshots are
+also available for FTP; see https://gcc.gnu.org/snapshots.html.
+
+If you would like to work on improvements to GCC, please read the
+advice at these URLs: https://gcc.gnu.org/contribute.html, https://gcc.gnu.org/contributewhy.html.
+
+for information on how to make useful contributions and avoid
+duplication of effort.  Suggested projects are listed at
+https://gcc.gnu.org/projects/.
\ No newline at end of file
diff --git a/doc/cppdiropts.rst b/doc/cppdiropts.rst
new file mode 100644
index 00000000000..91568fe5612
--- /dev/null
+++ b/doc/cppdiropts.rst
@@ -0,0 +1,217 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -I {dir}, -iquote {dir}, -isystem {dir}, -idirafter {dir}
+
+  Add the directory :samp:`{dir}` to the list of directories to be searched
+  for header files during preprocessing.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+  If :samp:`{dir}` begins with :samp:`=` or ``$SYSROOT``, then the :samp:`=`
+  or ``$SYSROOT`` is replaced by the sysroot prefix; see
+  :option:`--sysroot` and :option:`-isysroot`.
+
+  Directories specified with :option:`-iquote` apply only to the quote
+  form of the directive, ``#include "file"``.
+  Directories specified with :option:`-I`, :option:`-isystem`,
+  or :option:`-idirafter` apply to lookup for both the
+  ``#include "file"`` and
+  ``#include <file>`` directives.
+
+  You can specify any number or combination of these options on the
+  command line to search for header files in several directories.
+  The lookup order is as follows:
+
+  * For the quote form of the include directive, the directory of the current
+    file is searched first.
+
+  * For the quote form of the include directive, the directories specified
+    by :option:`-iquote` options are searched in left-to-right order,
+    as they appear on the command line.
+
+  * Directories specified with :option:`-I` options are scanned in
+    left-to-right order.
+
+  * Directories specified with :option:`-isystem` options are scanned in
+    left-to-right order.
+
+  * Standard system directories are scanned.
+
+  * Directories specified with :option:`-idirafter` options are scanned in
+    left-to-right order.
+
+  You can use :option:`-I` to override a system header
+  file, substituting your own version, since these directories are
+  searched before the standard system header file directories.
+  However, you should
+  not use this option to add directories that contain vendor-supplied
+  system header files; use :option:`-isystem` for that.
+
+  The :option:`-isystem` and :option:`-idirafter` options also mark the directory
+  as a system directory, so that it gets the same special treatment that
+  is applied to the standard system directories.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+  If a standard system include directory, or a directory specified with
+  :option:`-isystem`, is also specified with :option:`-I`, the :option:`-I`
+  option is ignored.  The directory is still searched but as a
+  system directory at its normal position in the system include chain.
+  This is to ensure that GCC's procedure to fix buggy system headers and
+  the ordering for the ``#include_next`` directive are not inadvertently
+  changed.
+  If you really need to change the search order for system directories,
+  use the :option:`-nostdinc` and/or :option:`-isystem` options.
+
+  .. only:: cpp
+
+    See :ref:`system-headers`.
+
+
+.. option:: -I-
+
+  Split the include path.
+  This option has been deprecated.  Please use :option:`-iquote` instead for
+  :option:`-I` directories before the :option:`-I-` and remove the :option:`-I-`
+  option.
+
+  Any directories specified with :option:`-I`
+  options before :option:`-I-` are searched only for headers requested with
+  ``#include "file"`` ; they are not searched for
+  ``#include <file>``.  If additional directories are
+  specified with :option:`-I` options after the :option:`-I-`, those
+  directories are searched for all :samp:`#include` directives.
+
+  In addition, :option:`-I-` inhibits the use of the directory of the current
+  file directory as the first search directory for ``#include
+  "file"``.  There is no way to override this effect of :option:`-I-`.
+
+  .. only:: cpp
+
+    See :ref:`search-path`.
+
+
+.. option:: -iprefix {prefix}
+
+  Specify :samp:`{prefix}` as the prefix for subsequent :option:`-iwithprefix`
+  options.  If the prefix represents a directory, you should include the
+  final :samp:`/`.
+
+.. option:: -iwithprefix {dir}, -iwithprefixbefore {dir}
+
+  Append :samp:`{dir}` to the prefix specified previously with
+  :option:`-iprefix`, and add the resulting directory to the include search
+  path.  :option:`-iwithprefixbefore` puts it in the same place :option:`-I`
+  would; :option:`-iwithprefix` puts it where :option:`-idirafter` would.
+
+.. option:: -isysroot {dir}
+
+  This option is like the :option:`--sysroot` option, but applies only to
+  header files (except for Darwin targets, where it applies to both header
+  files and libraries).  See the :option:`--sysroot` option for more
+  information.
+
+.. option:: -imultilib {dir}
+
+  Use :samp:`{dir}` as a subdirectory of the directory containing
+  target-specific C++ headers.
+
+.. option:: -nostdinc
+
+  Do not search the standard system directories for header files.
+  Only the directories explicitly specified with :option:`-I`,
+  :option:`-iquote`, :option:`-isystem`, and/or :option:`-idirafter`
+  options (and the directory of the current file, if appropriate)
+  are searched.
+
+.. option:: -nostdinc++
+
+  Do not search for header files in the C++-specific standard directories,
+  but do still search the other standard directories.  (This option is
+  used when building the C++ library.)
+
+.. option:: -Wcomment, -Wcomments
+
+  Warn whenever a comment-start sequence :samp:`/*` appears in a :samp:`/*`
+  comment, or whenever a backslash-newline appears in a :samp:`//` comment.
+  This warning is enabled by :option:`-Wall`.
+
+.. option:: -Wtrigraphs
+
+.. _wtrigraphs:
+
+  Warn if any trigraphs are encountered that might change the meaning of
+  the program.  Trigraphs within comments are not warned about,
+  except those that would form escaped newlines.
+
+  This option is implied by :option:`-Wall`.  If :option:`-Wall` is not
+  given, this option is still enabled unless trigraphs are enabled.  To
+  get trigraph conversion without warnings, but get the other
+  :option:`-Wall` warnings, use :samp:`-trigraphs -Wall -Wno-trigraphs`.
+
+.. option:: -Wundef
+
+  Warn if an undefined identifier is evaluated in an ``#if`` directive.
+  Such identifiers are replaced with zero.
+
+.. option:: -Wno-undef
+
+  Default setting; overrides :option:`-Wundef`.
+
+.. option:: -Wexpansion-to-defined
+
+  Warn whenever :samp:`defined` is encountered in the expansion of a macro
+  (including the case where the macro is expanded by an :samp:`#if` directive).
+  Such usage is not portable.
+  This warning is also enabled by :option:`-Wpedantic` and :option:`-Wextra`.
+
+.. option:: -Wunused-macros
+
+  Warn about macros defined in the main file that are unused.  A macro
+  is :dfn:`used` if it is expanded or tested for existence at least once.
+  The preprocessor also warns if the macro has not been used at the
+  time it is redefined or undefined.
+
+  Built-in macros, macros defined on the command line, and macros
+  defined in include files are not warned about.
+
+  .. note::
+
+    If a macro is actually used, but only used in skipped
+    conditional blocks, then the preprocessor reports it as unused.  To avoid the
+    warning in such a case, you might improve the scope of the macro's
+    definition by, for example, moving it into the first skipped block.
+    Alternatively, you could provide a dummy use with something like:
+
+  .. code-block:: c++
+
+    #if defined the_macro_causing_the_warning
+    #endif
+
+.. option:: -Wno-endif-labels
+
+  Do not warn whenever an ``#else`` or an ``#endif`` are followed by text.
+  This sometimes happens in older programs with code of the form
+
+  .. code-block:: c++
+
+    #if FOO
+    ...
+    #else FOO
+    ...
+    #endif FOO
+
+  The second and third ``FOO`` should be in comments.
+  This warning is on by default.
+
+.. option:: -Wendif-labels
+
+  Default setting; overrides :option:`-Wno-endif-labels`.
\ No newline at end of file
diff --git a/doc/cppenv.rst b/doc/cppenv.rst
new file mode 100644
index 00000000000..f27338cfa2f
--- /dev/null
+++ b/doc/cppenv.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. envvar:: CPATH, C_INCLUDE_PATH, CPLUS_INCLUDE_PATH, OBJC_INCLUDE_PATH
+
+  .. Commented out until ObjC++ is part of GCC:
+     @itemx OBJCPLUS_INCLUDE_PATH
+
+  Each variable's value is a list of directories separated by a special
+  character, much like :envvar:`PATH`, in which to look for header files.
+  The special character, ``PATH_SEPARATOR``, is target-dependent and
+  determined at GCC build time.  For Microsoft Windows-based targets it is a
+  semicolon, and for almost all other targets it is a colon.
+
+  :envvar:`CPATH` specifies a list of directories to be searched as if
+  specified with :option:`-I`, but after any paths given with :option:`-I`
+  options on the command line.  This environment variable is used
+  regardless of which language is being preprocessed.
+
+  The remaining environment variables apply only when preprocessing the
+  particular language indicated.  Each specifies a list of directories
+  to be searched as if specified with :option:`-isystem`, but after any
+  paths given with :option:`-isystem` options on the command line.
+
+  In all these variables, an empty element instructs the compiler to
+  search its current working directory.  Empty elements can appear at the
+  beginning or end of a path.  For instance, if the value of
+  :envvar:`CPATH` is ``:/special/include``, that has the same
+  effect as :samp:`-I. -I/special/include`.
+
+  .. only:: cpp
+
+    See also :ref:`search-path`.
+
+.. index:: dependencies for make as output
+
+.. envvar:: DEPENDENCIES_OUTPUT
+
+  If this variable is set, its value specifies how to output
+  dependencies for Make based on the non-system header files processed
+  by the compiler.  System header files are ignored in the dependency
+  output.
+
+  The value of :envvar:`DEPENDENCIES_OUTPUT` can be just a file name, in
+  which case the Make rules are written to that file, guessing the target
+  name from the source file name.  Or the value can have the form
+  :samp:`{file}{target}`, in which case the rules are written to
+  file :samp:`{file}` using :samp:`{target}` as the target name.
+
+  In other words, this environment variable is equivalent to combining
+  the options :option:`-MM` and :option:`-MF`
+
+  .. only:: cpp
+
+    (see :ref:`invocation`),
+
+  .. only:: not cpp
+
+    (see :ref:`preprocessor-options`),
+
+  with an optional :option:`-MT` switch too.
+
+.. index:: dependencies for make as output
+
+.. envvar:: SUNPRO_DEPENDENCIES
+
+  This variable is the same as :envvar:`DEPENDENCIES_OUTPUT` (see above),
+  except that system header files are not ignored, so it implies
+  :option:`-M` rather than :option:`-MM`.  However, the dependence on the
+  main input file is omitted.
+
+  .. only:: cpp
+
+    See :ref:`invocation`.
+
+  .. only:: not cpp
+
+    See :ref:`preprocessor-options`.
+
+.. envvar:: SOURCE_DATE_EPOCH
+
+  If this variable is set, its value specifies a UNIX timestamp to be
+  used in replacement of the current date and time in the ``__DATE__``
+  and ``__TIME__`` macros, so that the embedded timestamps become
+  reproducible.
+
+  The value of :envvar:`SOURCE_DATE_EPOCH` must be a UNIX timestamp,
+  defined as the number of seconds (excluding leap seconds) since
+  01 Jan 1970 00:00:00 represented in ASCII; identical to the output of
+  ``date +%s`` on GNU/Linux and other systems that support the
+  ``%s`` extension in the ``date`` command.
+
+  The value should be a known timestamp such as the last modification
+  time of the source or package and it should be set by the build
+  process.
\ No newline at end of file
diff --git a/doc/cppopts.rst b/doc/cppopts.rst
new file mode 100644
index 00000000000..60d663e35d8
--- /dev/null
+++ b/doc/cppopts.rst
@@ -0,0 +1,556 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. option:: -D {name}
+
+  Predefine :samp:`{name}` as a macro, with definition ``1``.
+
+.. option:: -D name=definition
+
+  The contents of :samp:`{definition}` are tokenized and processed as if
+  they appeared during translation phase three in a :samp:`#define`
+  directive.  In particular, the definition is truncated by
+  embedded newline characters.
+
+  If you are invoking the preprocessor from a shell or shell-like
+  program you may need to use the shell's quoting syntax to protect
+  characters such as spaces that have a meaning in the shell syntax.
+
+  If you wish to define a function-like macro on the command line, write
+  its argument list with surrounding parentheses before the equals sign
+  (if any).  Parentheses are meaningful to most shells, so you should
+  quote the option.  With :command:`sh` and :command:`csh`,
+  :option:`-D'name(args...)=definition'` works.
+
+  :option:`-D` and :option:`-U` options are processed in the order they
+  are given on the command line.  All :option:`-imacros file` and
+  :option:`-include file` options are processed after all
+  :option:`-D` and :option:`-U` options.
+
+.. option:: -U {name}
+
+  Cancel any previous definition of :samp:`{name}`, either built in or
+  provided with a :option:`-D` option.
+
+.. option:: -include {file}
+
+  Process :samp:`{file}` as if ``#include "file"`` appeared as the first
+  line of the primary source file.  However, the first directory searched
+  for :samp:`{file}` is the preprocessor's working directory *instead of*
+  the directory containing the main source file.  If not found there, it
+  is searched for in the remainder of the ``#include "..."`` search
+  chain as normal.
+
+  If multiple :option:`-include` options are given, the files are included
+  in the order they appear on the command line.
+
+.. option:: -imacros {file}
+
+  Exactly like :option:`-include`, except that any output produced by
+  scanning :samp:`{file}` is thrown away.  Macros it defines remain defined.
+  This allows you to acquire all the macros from a header without also
+  processing its declarations.
+
+  All files specified by :option:`-imacros` are processed before all files
+  specified by :option:`-include`.
+
+.. option:: -undef
+
+  Do not predefine any system-specific or GCC-specific macros.  The
+  standard predefined macros remain defined.
+
+  .. only:: cpp
+
+    See :ref:`standard-predefined-macros`.
+
+.. option:: -pthread
+
+  Define additional macros required for using the POSIX threads library.
+  You should use this option consistently for both compilation and linking.
+  This option is supported on GNU/Linux targets, most other Unix derivatives,
+  and also on x86 Cygwin and MinGW targets.
+
+.. index:: make, dependencies, make
+
+.. option:: -M
+
+  Instead of outputting the result of preprocessing, output a rule
+  suitable for :command:`make` describing the dependencies of the main
+  source file.  The preprocessor outputs one :command:`make` rule containing
+  the object file name for that source file, a colon, and the names of all
+  the included files, including those coming from :option:`-include` or
+  :option:`-imacros` command-line options.
+
+  Unless specified explicitly (with :option:`-MT` or :option:`-MQ`), the
+  object file name consists of the name of the source file with any
+  suffix replaced with object file suffix and with any leading directory
+  parts removed.  If there are many included files then the rule is
+  split into several lines using :samp:`\\` -newline.  The rule has no
+  commands.
+
+  This option does not suppress the preprocessor's debug output, such as
+  :option:`-dM`.  To avoid mixing such debug output with the dependency
+  rules you should explicitly specify the dependency output file with
+  :option:`-MF`, or use an environment variable like
+  :envvar:`DEPENDENCIES_OUTPUT` (see :ref:`environment-variables`).  Debug output
+  is still sent to the regular output stream as normal.
+
+  Passing :option:`-M` to the driver implies :option:`-E`, and suppresses
+  warnings with an implicit :option:`-w`.
+
+.. option:: -MM
+
+  Like :option:`-M` but do not mention header files that are found in
+  system header directories, nor header files that are included,
+  directly or indirectly, from such a header.
+
+  This implies that the choice of angle brackets or double quotes in an
+  :samp:`#include` directive does not in itself determine whether that
+  header appears in :option:`-MM` dependency output.
+
+.. option:: -MF {file}
+
+  When used with :option:`-M` or :option:`-MM`, specifies a
+  file to write the dependencies to.  If no :option:`-MF` switch is given
+  the preprocessor sends the rules to the same place it would send
+  preprocessed output.
+
+  When used with the driver options :option:`-MD` or :option:`-MMD`,
+  :option:`-MF` overrides the default dependency output file.
+
+  If :samp:`{file}` is :samp:`-`, then the dependencies are written to :samp:`stdout`.
+
+.. option:: -MG
+
+  In conjunction with an option such as :option:`-M` requesting
+  dependency generation, :option:`-MG` assumes missing header files are
+  generated files and adds them to the dependency list without raising
+  an error.  The dependency filename is taken directly from the
+  ``#include`` directive without prepending any path.  :option:`-MG`
+  also suppresses preprocessed output, as a missing header file renders
+  this useless.
+
+  This feature is used in automatic updating of makefiles.
+
+.. option:: -Mno-modules
+
+  Disable dependency generation for compiled module interfaces.
+
+.. option:: -MP
+
+  This option instructs CPP to add a phony target for each dependency
+  other than the main file, causing each to depend on nothing.  These
+  dummy rules work around errors :command:`make` gives if you remove header
+  files without updating the :samp:`Makefile` to match.
+
+  This is typical output:
+
+  .. code-block:: c++
+
+    test.o: test.c test.h
+
+    test.h:
+
+.. option:: -MT {target}
+
+  Change the target of the rule emitted by dependency generation.  By
+  default CPP takes the name of the main input file, deletes any
+  directory components and any file suffix such as :samp:`.c`, and
+  appends the platform's usual object suffix.  The result is the target.
+
+  An :option:`-MT` option sets the target to be exactly the string you
+  specify.  If you want multiple targets, you can specify them as a single
+  argument to :option:`-MT`, or use multiple :option:`-MT` options.
+
+  For example, ``-MT '$(objpfx)foo.o'`` might give
+
+  .. code-block:: c++
+
+    $(objpfx)foo.o: foo.c
+
+.. option:: -MQ {target}
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  Make. ``-MQ '$(objpfx)foo.o'`` gives
+
+  .. code-block:: c++
+
+    $$(objpfx)foo.o: foo.c
+
+  The default target is automatically quoted, as if it were given with
+  :option:`-MQ`.
+
+.. option:: -MD
+
+  :option:`-MD` is equivalent to :option:`-M -MF file`, except that
+  :option:`-E` is not implied.  The driver determines :samp:`{file}` based on
+  whether an :option:`-o` option is given.  If it is, the driver uses its
+  argument but with a suffix of :samp:`.d`, otherwise it takes the name
+  of the input file, removes any directory components and suffix, and
+  applies a :samp:`.d` suffix.
+
+  If :option:`-MD` is used in conjunction with :option:`-E`, any
+  :option:`-o` switch is understood to specify the dependency output file
+  (see :option:`-MF`), but if used without :option:`-E`, each :option:`-o`
+  is understood to specify a target object file.
+
+  Since :option:`-E` is not implied, :option:`-MD` can be used to generate
+  a dependency output file as a side effect of the compilation process.
+
+.. option:: -MMD
+
+  Like :option:`-MD` except mention only user header files, not system
+  header files.
+
+.. option:: -fpreprocessed
+
+  Indicate to the preprocessor that the input file has already been
+  preprocessed.  This suppresses things like macro expansion, trigraph
+  conversion, escaped newline splicing, and processing of most directives.
+  The preprocessor still recognizes and removes comments, so that you can
+  pass a file preprocessed with :option:`-C` to the compiler without
+  problems.  In this mode the integrated preprocessor is little more than
+  a tokenizer for the front ends.
+
+  :option:`-fpreprocessed` is implicit if the input file has one of the
+  extensions :samp:`.i`, :samp:`.ii` or :samp:`.mi`.  These are the
+  extensions that GCC uses for preprocessed files created by
+  :option:`-save-temps`.
+
+.. option:: -fdirectives-only
+
+  When preprocessing, handle directives, but do not expand macros.
+
+  The option's behavior depends on the :option:`-E` and :option:`-fpreprocessed`
+  options.
+
+  With :option:`-E`, preprocessing is limited to the handling of directives
+  such as ``#define``, ``#ifdef``, and ``#error``.  Other
+  preprocessor operations, such as macro expansion and trigraph
+  conversion are not performed.  In addition, the :option:`-dD` option is
+  implicitly enabled.
+
+  With :option:`-fpreprocessed`, predefinition of command line and most
+  builtin macros is disabled.  Macros such as ``__LINE__``, which are
+  contextually dependent, are handled normally.  This enables compilation of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+  With both :option:`-E` and :option:`-fpreprocessed`, the rules for
+  :option:`-fpreprocessed` take precedence.  This enables full preprocessing of
+  files previously preprocessed with ``-E -fdirectives-only``.
+
+.. option:: -fdollars-in-identifiers
+
+  Accept :samp:`$` in identifiers.
+
+  .. only:: cpp
+
+    See :ref:`identifier-characters`.
+
+.. option:: -fextended-identifiers
+
+  Accept universal character names and extended characters in
+  identifiers.  This option is enabled by default for C99 (and later C
+  standard versions) and C++.
+
+.. option:: -fno-canonical-system-headers
+
+  When preprocessing, do not shorten system header paths with canonicalization.
+
+.. option:: -fmax-include-depth={depth}
+
+  Set the maximum depth of the nested #include. The default is 200.
+
+.. option:: -ftabstop={width}
+
+  Set the distance between tab stops.  This helps the preprocessor report
+  correct column numbers in warnings or errors, even if tabs appear on the
+  line.  If the value is less than 1 or greater than 100, the option is
+  ignored.  The default is 8.
+
+.. option:: -ftrack-macro-expansion[={level}]
+
+  Track locations of tokens across macro expansions. This allows the
+  compiler to emit diagnostic about the current macro expansion stack
+  when a compilation error occurs in a macro expansion. Using this
+  option makes the preprocessor and the compiler consume more
+  memory. The :samp:`{level}` parameter can be used to choose the level of
+  precision of token location tracking thus decreasing the memory
+  consumption if necessary. Value :samp:`0` of :samp:`{level}` de-activates
+  this option. Value :samp:`1` tracks tokens locations in a
+  degraded mode for the sake of minimal memory overhead. In this mode
+  all tokens resulting from the expansion of an argument of a
+  function-like macro have the same location. Value :samp:`2` tracks
+  tokens locations completely. This value is the most memory hungry.
+  When this option is given no argument, the default parameter value is
+  :samp:`2`.
+
+  Note that ``-ftrack-macro-expansion=2`` is activated by default.
+
+.. option:: -fmacro-prefix-map={old}={new}
+
+  When preprocessing files residing in directory :samp:`{old}`,
+  expand the ``__FILE__`` and ``__BASE_FILE__`` macros as if the
+  files resided in directory :samp:`{new}` instead.  This can be used
+  to change an absolute path to a relative path by using :samp:`.` for
+  :samp:`{new}` which can result in more reproducible builds that are
+  location independent.  This option also affects
+  ``__builtin_FILE()`` during compilation.  See also
+  :option:`-ffile-prefix-map`.
+
+.. index:: character set, execution
+
+.. option:: -fexec-charset={charset}
+
+  Set the execution character set, used for string and character
+  constants.  The default is UTF-8.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. index:: character set, wide execution
+
+.. option:: -fwide-exec-charset={charset}
+
+  Set the wide execution character set, used for wide string and
+  character constants.  The default is one of UTF-32BE, UTF-32LE, UTF-16BE,
+  or UTF-16LE, whichever corresponds to the width of ``wchar_t`` and the
+  big-endian or little-endian byte order being used for code generation.  As
+  with :option:`-fexec-charset`, :samp:`{charset}` can be any encoding supported
+  by the system's ``iconv`` library routine; however, you will have
+  problems with encodings that do not fit exactly in ``wchar_t``.
+
+.. index:: character set, input
+
+.. option:: -finput-charset={charset}
+
+  Set the input character set, used for translation from the character
+  set of the input file to the source character set used by GCC.  If the
+  locale does not specify, or GCC cannot get this information from the
+  locale, the default is UTF-8.  This can be overridden by either the locale
+  or this command-line option.  Currently the command-line option takes
+  precedence if there's a conflict.  :samp:`{charset}` can be any encoding
+  supported by the system's ``iconv`` library routine.
+
+.. only:: not cpp
+
+  .. option:: -fpch-deps
+
+    When using precompiled headers (see :ref:`precompiled-headers`), this flag
+    causes the dependency-output flags to also list the files from the
+    precompiled header's dependencies.  If not specified, only the
+    precompiled header are listed and not the files that were used to
+    create it, because those files are not consulted when a precompiled
+    header is used.
+
+  .. option:: -fpch-preprocess
+
+    This option allows use of a precompiled header (see :ref:`precompiled-headers`) together with :option:`-E`.  It inserts a special ``#pragma``,
+    ``#pragma GCC pch_preprocess "filename"`` in the output to mark
+    the place where the precompiled header was found, and its :samp:`{filename}`.
+    When :option:`-fpreprocessed` is in use, GCC recognizes this ``#pragma``
+    and loads the PCH.
+
+    This option is off by default, because the resulting preprocessed output
+    is only really suitable as input to GCC.  It is switched on by
+    :option:`-save-temps`.
+
+    You should not write this ``#pragma`` in your own code, but it is
+    safe to edit the filename if the PCH file is available in a different
+    location.  The filename may be absolute or it may be relative to GCC's
+    current directory.
+
+.. option:: -fworking-directory
+
+  Enable generation of linemarkers in the preprocessor output that
+  let the compiler know the current working directory at the time of
+  preprocessing.  When this option is enabled, the preprocessor
+  emits, after the initial linemarker, a second linemarker with the
+  current working directory followed by two slashes.  GCC uses this
+  directory, when it's present in the preprocessed input, as the
+  directory emitted as the current working directory in some debugging
+  information formats.  This option is implicitly enabled if debugging
+  information is enabled, but this can be inhibited with the negated
+  form :option:`-fno-working-directory`.  If the :option:`-P` flag is
+  present in the command line, this option has no effect, since no
+  ``#line`` directives are emitted whatsoever.
+
+.. option:: -fno-working-directory
+
+  Default setting; overrides :option:`-fworking-directory`.
+
+.. option:: -A {predicate}={answer}
+
+  Make an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.  This form is preferred to the older form :option:`-A
+  predicate(answer)`, which is still supported, because
+  it does not use shell special characters.
+
+  .. only:: cpp
+
+    See :ref:`obsolete-features`.
+
+.. option:: -A -predicate=answer
+
+  Cancel an assertion with the predicate :samp:`{predicate}` and answer
+  :samp:`{answer}`.
+
+.. option:: -C
+
+  Do not discard comments.  All comments are passed through to the output
+  file, except for comments in processed directives, which are deleted
+  along with the directive.
+
+  You should be prepared for side effects when using :option:`-C` ; it
+  causes the preprocessor to treat comments as tokens in their own right.
+  For example, comments appearing at the start of what would be a
+  directive line have the effect of turning that line into an ordinary
+  source line, since the first token on the line is no longer a :samp:`#`.
+
+.. option:: -CC
+
+  Do not discard comments, including during macro expansion.  This is
+  like :option:`-C`, except that comments contained within macros are
+  also passed through to the output file where the macro is expanded.
+
+  In addition to the side effects of the :option:`-C` option, the
+  :option:`-CC` option causes all C++-style comments inside a macro
+  to be converted to C-style comments.  This is to prevent later use
+  of that macro from inadvertently commenting out the remainder of
+  the source line.
+
+  The :option:`-CC` option is generally used to support lint comments.
+
+.. option:: -P
+
+  Inhibit generation of linemarkers in the output from the preprocessor.
+  This might be useful when running the preprocessor on something that is
+  not C code, and will be sent to a program which might be confused by the
+  linemarkers.
+
+  .. only:: cpp
+
+    See :ref:`preprocessor-output`.
+
+  .. index:: traditional C language, C language, traditional
+
+.. option:: -traditional, -traditional-cpp
+
+  Try to imitate the behavior of pre-standard C preprocessors, as
+  opposed to ISO C preprocessors.
+
+  .. only:: cpp
+
+    See :ref:`traditional-mode`.
+
+  .. only:: not cpp
+
+    See the GNU CPP manual for details.
+
+  Note that GCC does not otherwise attempt to emulate a pre-standard
+  C compiler, and these options are only supported with the :option:`-E`
+  switch, or when invoking CPP explicitly.
+
+.. option:: -trigraphs
+
+  Support ISO C trigraphs.
+  These are three-character sequences, all starting with :samp:`??`, that
+  are defined by ISO C to stand for single characters.  For example,
+  :samp:`??/` stands for :samp:`\\`, so :samp:`??/n` is a character
+  constant for a newline.
+
+  .. only:: cpp
+
+    See :ref:`initial-processing`.
+
+  .. only:: not cpp
+
+    The nine trigraphs and their replacements are
+
+    .. code-block::
+
+      Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+      Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+  By default, GCC ignores trigraphs, but in
+  standard-conforming modes it converts them.  See the :option:`-std` and
+  :option:`-ansi` options.
+
+.. option:: -remap
+
+  Enable special code to work around file systems which only permit very
+  short file names, such as MS-DOS.
+
+.. option:: -H
+
+  Print the name of each header file used, in addition to other normal
+  activities.  Each name is indented to show how deep in the
+  :samp:`#include` stack it is.  Precompiled header files are also
+  printed, even if they are found to be invalid; an invalid precompiled
+  header file is printed with :samp:`...x` and a valid one with :samp:`...!` .
+
+.. option:: -dletters
+
+  Says to make debugging dumps during compilation as specified by
+  :samp:`{letters}`.  The flags documented here are those relevant to the
+  preprocessor.  Other :samp:`{letters}` are interpreted
+  by the compiler proper, or reserved for future versions of GCC, and so
+  are silently ignored.  If you specify :samp:`{letters}` whose behavior
+  conflicts, the result is undefined.
+
+  .. only:: not cpp
+
+    See :ref:`developer-options`, for more information.
+
+  .. option:: -dM
+
+    Instead of the normal output, generate a list of :samp:`#define`
+    directives for all the macros defined during the execution of the
+    preprocessor, including predefined macros.  This gives you a way of
+    finding out what is predefined in your version of the preprocessor.
+    Assuming you have no file :samp:`foo.h`, the command
+
+    .. code-block:: c++
+
+      touch foo.h; cpp -dM foo.h
+
+    shows all the predefined macros.
+
+    .. only:: cpp
+
+      If you use :option:`-dM` without the :option:`-E` option, :option:`-dM` is
+      interpreted as a synonym for :option:`-fdump-rtl-mach`.
+      See :ref:`developer-options`.
+
+  .. option:: -dD
+
+    Like :option:`-dM` except in two respects: it does *not* include the
+    predefined macros, and it outputs *both* the :samp:`#define`
+    directives and the result of preprocessing.  Both kinds of output go to
+    the standard output file.
+
+  .. option:: -dN
+
+    Like :option:`-dD`, but emit only the macro names, not their expansions.
+
+  .. option:: -dI
+
+    Output :samp:`#include` directives in addition to the result of
+    preprocessing.
+
+  .. option:: -dU
+
+    Like :option:`-dD` except that only macros that are expanded, or whose
+    definedness is tested in preprocessor directives, are output; the
+    output is delayed until the use or test of the macro; and
+    :samp:`#undef` directives are also output for macros tested but
+    undefined at the time.
+
+.. option:: -fdebug-cpp
+
+  This option is only useful for debugging GCC.  When used from CPP or with
+  :option:`-E`, it dumps debugging information about location maps.  Every
+  token in the output is preceded by the dump of the map its location
+  belongs to.
+
+  When used from GCC without :option:`-E`, this option has no effect.
\ No newline at end of file
diff --git a/doc/cppwarnopts.rst b/doc/cppwarnopts.rst
new file mode 100644
index 00000000000..8e9e9e7276f
--- /dev/null
+++ b/doc/cppwarnopts.rst
@@ -0,0 +1,4 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
\ No newline at end of file
diff --git a/doc/favicon.ico b/doc/favicon.ico
new file mode 100644
index 00000000000..42e8969edc8
Binary files /dev/null and b/doc/favicon.ico differ
diff --git a/doc/funding.rst b/doc/funding.rst
new file mode 100644
index 00000000000..ee4daca6fd7
--- /dev/null
+++ b/doc/funding.rst
@@ -0,0 +1,47 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+Funding Free Software
+=====================
+
+If you want to have more free software a few years from now, it makes
+sense for you to help encourage people to contribute funds for its
+development.  The most effective approach known is to encourage
+commercial redistributors to donate.
+
+Users of free software systems can boost the pace of development by
+encouraging for-a-fee distributors to donate part of their selling price
+to free software developers-the Free Software Foundation, and others.
+
+The way to convince distributors to do this is to demand it and expect
+it from them.  So when you compare distributors, judge them partly by
+how much they give to free software development.  Show distributors
+they must compete to be the one who gives the most.
+
+To make this approach work, you must insist on numbers that you can
+compare, such as, 'We will donate ten dollars to the Frobnitz project
+for each disk sold.'  Don't be satisfied with a vague promise, such as
+'A portion of the profits are donated,' since it doesn't give a basis
+for comparison.
+
+Even a precise fraction 'of the profits from this disk' is not very
+meaningful, since creative accounting and unrelated business decisions
+can greatly alter what fraction of the sales price counts as profit.
+If the price you pay is $50, ten percent of the profit is probably
+less than a dollar; it might be a few cents, or nothing at all.
+
+Some redistributors do development work themselves.  This is useful too;
+but to keep everyone honest, you need to inquire how much they do, and
+what kind.  Some kinds of development make much more long-term
+difference than others.  For example, maintaining a separate version of
+a program contributes very little; maintaining the standard version of a
+program for the whole community contributes much.  Easy new ports
+contribute little, since someone else would surely do them; difficult
+ports such as adding a new CPU to the GNU Compiler Collection contribute more;
+major new features or packages contribute the most.
+
+By establishing the idea that supporting further development is 'the
+proper thing to do' when distributing free software for a fee, we can
+assure a steady flow of resources into making more free software.
\ No newline at end of file
diff --git a/doc/gcc_sphinx.py b/doc/gcc_sphinx.py
new file mode 100644
index 00000000000..2ef15aef944
--- /dev/null
+++ b/doc/gcc_sphinx.py
@@ -0,0 +1,44 @@
+# GCC Sphinx customization
+
+__version__ = '1.0'
+
+
+def setup(app):
+    app.add_object_type('gcc-attr', 'gcc-attr', objname='GCC attribute',
+                        indextemplate='pair: %s; attribute')
+    app.add_object_type('fn-attr', 'fn-attr', objname='function attribute',
+                        indextemplate='pair: %s; function attribute')
+    app.add_object_type('var-attr', 'var-attr', objname='variable attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('type-attr', 'type-attr', objname='type attribute',
+                        indextemplate='pair: %s; variable attribute')
+    app.add_object_type('enum-attr', 'enum-attr', objname='Enumerator attribute',
+                        indextemplate='pair: %s; enumerator attribute')
+    app.add_object_type('label-attr', 'label-attr', objname='Label attribute',
+                        indextemplate='pair: %s; label attribute')
+    app.add_object_type('gcc-param', 'gcc-param', objname='GCC parameter',
+                        indextemplate='pair: %s; parameter')
+
+    targets = (('AArch64 ', 'aarch64'), ('AMD GCN ', 'amd-gcn'), ('ARC ', 'arc'), ('ARM ', 'arm'), ('AVR ', 'avr'),
+               ('Blackfin ', 'blackfin'), ('BPF ', 'bpf'), ('C-SKY ', 'c-sky'),
+               ('Epiphany ', 'epiphany'), ('H8/300 ', 'h8-300'), ('IA-64 ', 'ia-64'), ('LoongArch', 'loongarch'), ('M32C ', 'm32c'),
+               ('M32R/D ', 'm32r-d'), ('m68k ', 'm68k'), ('MCORE ', 'mcore'), ('MeP ', 'mep'),
+               ('MicroBlaze ', 'microblaze'), ('Microsoft Windows ', 'microsoft-windows'), ('MIPS ', 'mips'),
+               ('MSP430 ', 'msp430'), ('NDS32 ', 'nds32'), ('Nios II ', 'nios-ii'), ('Nvidia PTX ', 'nvidia-ptx'),
+               ('PowerPC ', 'powerpc'), ('RISC-V ', 'risc-v'), ('RL78 ', 'rl78'), ('RX ', 'rx'), ('S/390 ', 's-390'),
+               ('SH ', 'sh'), ('Symbian OS ', 'symbian-os'), ('V850 ', 'v850'), ('Visium ', 'visium'), ('x86 ', 'x86'),
+               ('Xstormy16 ', 'xstormy16'))
+
+    for target_name, target in targets:
+        app.add_object_type(f'{target}-fn-attr', f'{target}-fn-attr', objname=f'{target_name} function attribute',
+                            indextemplate=f'pair: %s; {target_name} function attribute')
+        app.add_object_type(f'{target}-var-attr', f'{target}-var-attr', objname=f'{target_name} variable attribute',
+                            indextemplate=f'pair: %s; {target_name} variable attribute')
+        app.add_object_type(f'{target}-type-attr', f'{target}-type-attr', objname=f'{target_name} type attribute',
+                            indextemplate=f'pair: %s; {target_name} type attribute')
+
+    return dict(
+        version=__version__,
+        parallel_read_safe=True,
+        parallel_write_safe=True
+    )
diff --git a/doc/gnu.rst b/doc/gnu.rst
new file mode 100644
index 00000000000..930659b250b
--- /dev/null
+++ b/doc/gnu.rst
@@ -0,0 +1,19 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu-project:
+
+The GNU Project and GNU/Linux
+=============================
+
+The GNU Project was launched in 1984 to develop a complete Unix-like
+operating system which is free software: the GNU system.  (GNU is a
+recursive acronym for 'GNU's Not Unix'; it is pronounced
+'guh-NEW'.)  Variants of the GNU operating system, which use the
+kernel Linux, are now widely used; though these systems are often
+referred to as 'Linux', they are more accurately called GNU/Linux
+systems.
+
+For more information, see: https://www.gnu.org/ and https://www.gnu.org/gnu/linux-and-gnu.html.
\ No newline at end of file
diff --git a/doc/gnu_free_documentation_license.rst b/doc/gnu_free_documentation_license.rst
new file mode 100644
index 00000000000..5a7d110efde
--- /dev/null
+++ b/doc/gnu_free_documentation_license.rst
@@ -0,0 +1,476 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _gnu_fdl:
+
+******************************
+GNU Free Documentation License
+******************************
+
+Version 1.3, 3 November 2008
+
+Copyright  2000, 2001, 2002, 2007, 2008  Free Software Foundation, Inc
+https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+~~~~~~~~
+
+The purpose of this License is to make a manual, textbook, or other
+functional and useful document "free" in the sense of freedom: to
+assure everyone the effective freedom to copy and redistribute it,
+with or without modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and publisher a way
+to get credit for their work, while not being considered responsible
+for modifications made by others.
+
+This License is a kind of "copyleft", which means that derivative
+works of the document must themselves be free in the same sense.  It
+complements the GNU General Public License, which is a copyleft
+license designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free
+program should come with manuals providing the same freedoms that the
+software does.  But this License is not limited to software manuals;
+it can be used for any textual work, regardless of subject matter or
+whether it is published as a printed book.  We recommend this License
+principally for works whose purpose is instruction or reference.
+
+1. APPLICABILITY AND DEFINITIONS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This License applies to any manual or other work, in any medium, that
+contains a notice placed by the copyright holder saying it can be
+distributed under the terms of this License.  Such a notice grants a
+world-wide, royalty-free license, unlimited in duration, to use that
+work under the conditions stated herein.  The **Document**, below,
+refers to any such manual or work.  Any member of the public is a
+licensee, and is addressed as "**you**".  You accept the license if you
+copy, modify or distribute the work in a way requiring permission
+under copyright law.
+
+A "**Modified Version**" of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+A "**Secondary Section**" is a named appendix or a front-matter section of
+the Document that deals exclusively with the relationship of the
+publishers or authors of the Document to the Document's overall subject
+(or to related matters) and contains nothing that could fall directly
+within that overall subject.  (Thus, if the Document is in part a
+textbook of mathematics, a Secondary Section may not explain any
+mathematics.)  The relationship could be a matter of historical
+connection with the subject or with related matters, or of legal,
+commercial, philosophical, ethical or political position regarding
+them.
+
+The "**Invariant Sections**" are certain Secondary Sections whose titles
+are designated, as being those of Invariant Sections, in the notice
+that says that the Document is released under this License.  If a
+section does not fit the above definition of Secondary then it is not
+allowed to be designated as Invariant.  The Document may contain zero
+Invariant Sections.  If the Document does not identify any Invariant
+Sections then there are none.
+
+The "**Cover Texts**" are certain short passages of text that are listed,
+as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+the Document is released under this License.  A Front-Cover Text may
+be at most 5 words, and a Back-Cover Text may be at most 25 words.
+
+A "**Transparent**" copy of the Document means a machine-readable copy,
+represented in a format whose specification is available to the
+general public, that is suitable for revising the document
+straightforwardly with generic text editors or (for images composed of
+pixels) generic paint programs or (for drawings) some widely available
+drawing editor, and that is suitable for input to text formatters or
+for automatic translation to a variety of formats suitable for input
+to text formatters.  A copy made in an otherwise Transparent file
+format whose markup, or absence of markup, has been arranged to thwart
+or discourage subsequent modification by readers is not Transparent.
+An image format is not Transparent if used for any substantial amount
+of text.  A copy that is not "Transparent" is called **Opaque**.
+
+Examples of suitable formats for Transparent copies include plain
+ASCII without markup, Texinfo input format, LaTeX input format, SGML
+or XML using a publicly available DTD, and standard-conforming simple
+HTML, PostScript or PDF designed for human modification.  Examples of
+transparent image formats include PNG, XCF and JPG.  Opaque formats
+include proprietary formats that can be read and edited only by
+proprietary word processors, SGML or XML for which the DTD and/or
+processing tools are not generally available, and the
+machine-generated HTML, PostScript or PDF produced by some word
+processors for output purposes only.
+
+The "**Title Page**" means, for a printed book, the title page itself,
+plus such following pages as are needed to hold, legibly, the material
+this License requires to appear in the title page.  For works in
+formats which do not have any title page as such, "Title Page" means
+the text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+The "**publisher**" means any person or entity that distributes
+copies of the Document to the public.
+
+A section "**Entitled XYZ**" means a named subunit of the Document whose
+title either is precisely XYZ or contains XYZ in parentheses following
+text that translates XYZ in another language.  (Here XYZ stands for a
+specific section name mentioned below, such as "**Acknowledgements**",
+"**Dedications**", "**Endorsements**", or "**History**".)
+To "**Preserve the Title**"
+of such a section when you modify the Document means that it remains a
+section "Entitled XYZ" according to this definition.
+
+The Document may include Warranty Disclaimers next to the notice which
+states that this License applies to the Document.  These Warranty
+Disclaimers are considered to be included by reference in this
+License, but only as regards disclaiming warranties: any other
+implication that these Warranty Disclaimers may have is void and has
+no effect on the meaning of this License.
+
+2. VERBATIM COPYING
+~~~~~~~~~~~~~~~~~~~
+
+You may copy and distribute the Document in any medium, either
+commercially or noncommercially, provided that this License, the
+copyright notices, and the license notice saying this License applies
+to the Document are reproduced in all copies, and that you add no other
+conditions whatsoever to those of this License.  You may not use
+technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute.  However, you may accept
+compensation in exchange for copies.  If you distribute a large enough
+number of copies you must also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+3. COPYING IN QUANTITY
+~~~~~~~~~~~~~~~~~~~~~~
+
+If you publish printed copies (or copies in media that commonly have
+printed covers) of the Document, numbering more than 100, and the
+Document's license notice requires Cover Texts, you must enclose the
+copies in covers that carry, clearly and legibly, all these Cover
+Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+the back cover.  Both covers must also clearly and legibly identify
+you as the publisher of these copies.  The front cover must present
+the full title with all words of the title equally prominent and
+visible.  You may add other material on the covers in addition.
+Copying with changes limited to the covers, as long as they preserve
+the title of the Document and satisfy these conditions, can be treated
+as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute Opaque copies of the Document numbering
+more than 100, you must either include a machine-readable Transparent
+copy along with each Opaque copy, or state in or with each Opaque copy
+a computer-network location from which the general network-using
+public has access to download using public-standard network protocols
+a complete Transparent copy of the Document, free of added material.
+If you use the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity, to ensure
+that this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you distribute an
+Opaque copy (directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the authors of the
+Document well before redistributing any large number of copies, to give
+them a chance to provide you with an updated version of the Document.
+
+4. MODIFICATIONS
+~~~~~~~~~~~~~~~~
+
+You may copy and distribute a Modified Version of the Document under
+the conditions of sections 2 and 3 above, provided that you release
+the Modified Version under precisely this License, with the Modified
+Version filling the role of the Document, thus licensing distribution
+and modification of the Modified Version to whoever possesses a copy
+of it.  In addition, you must do these things in the Modified Version:
+
+A. Use in the Title Page (and on the covers, if any) a title distinct
+   from that of the Document, and from those of previous versions
+   (which should, if there were any, be listed in the History section
+   of the Document).  You may use the same title as a previous version
+   if the original publisher of that version gives permission.
+
+B. List on the Title Page, as authors, one or more persons or entities
+   responsible for authorship of the modifications in the Modified
+   Version, together with at least five of the principal authors of the
+   Document (all of its principal authors, if it has fewer than five),
+   unless they release you from this requirement.
+
+C. State on the Title page the name of the publisher of the
+   Modified Version, as the publisher.
+
+D. Preserve all the copyright notices of the Document.
+
+E. Add an appropriate copyright notice for your modifications
+   adjacent to the other copyright notices.
+
+F. Include, immediately after the copyright notices, a license notice
+   giving the public permission to use the Modified Version under the
+   terms of this License, in the form shown in the Addendum below.
+
+G. Preserve in that license notice the full lists of Invariant Sections
+   and required Cover Texts given in the Document's license notice.
+H. Include an unaltered copy of this License.
+
+I. Preserve the section Entitled "History", Preserve its Title, and add
+   to it an item stating at least the title, year, new authors, and
+   publisher of the Modified Version as given on the Title Page.  If
+   there is no section Entitled "History" in the Document, create one
+   stating the title, year, authors, and publisher of the Document as
+   given on its Title Page, then add an item describing the Modified
+   Version as stated in the previous sentence.
+
+J. Preserve the network location, if any, given in the Document for
+   public access to a Transparent copy of the Document, and likewise
+   the network locations given in the Document for previous versions
+   it was based on.  These may be placed in the "History" section.
+   You may omit a network location for a work that was published at
+   least four years before the Document itself, or if the original
+   publisher of the version it refers to gives permission.
+
+K. For any section Entitled "Acknowledgements" or "Dedications",
+   Preserve the Title of the section, and preserve in the section all
+   the substance and tone of each of the contributor acknowledgements
+   and/or dedications given therein.
+
+L. Preserve all the Invariant Sections of the Document,
+   unaltered in their text and in their titles.  Section numbers
+   or the equivalent are not considered part of the section titles.
+
+M. Delete any section Entitled "Endorsements".  Such a section
+   may not be included in the Modified Version.
+
+N. Do not retitle any existing section to be Entitled "Endorsements"
+   or to conflict in title with any Invariant Section.
+
+O. Preserve any Warranty Disclaimers.
+
+If the Modified Version includes new front-matter sections or
+appendices that qualify as Secondary Sections and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant.  To do this, add their titles to the
+list of Invariant Sections in the Modified Version's license notice.
+These titles must be distinct from any other section titles.
+
+You may add a section Entitled "Endorsements", provided it contains
+nothing but endorsements of your Modified Version by various
+parties---for example, statements of peer review or that the text has
+been approved by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover Text, and a
+passage of up to 25 words as a Back-Cover Text, to the end of the list
+of Cover Texts in the Modified Version.  Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or
+through arrangements made by) any one entity.  If the Document already
+includes a cover text for the same cover, previously added by you or
+by arrangement made by the same entity you are acting on behalf of,
+you may not add another; but you may replace the old one, on explicit
+permission from the previous publisher that added the old one.
+
+The author(s) and publisher(s) of the Document do not by this License
+give permission to use their names for publicity for or to assert or
+imply endorsement of any Modified Version.
+
+5. COMBINING DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~
+
+You may combine the Document with other documents released under this
+License, under the terms defined in section 4 above for modified
+versions, provided that you include in the combination all of the
+Invariant Sections of all of the original documents, unmodified, and
+list them all as Invariant Sections of your combined work in its
+license notice, and that you preserve all their Warranty Disclaimers.
+
+The combined work need only contain one copy of this License, and
+multiple identical Invariant Sections may be replaced with a single
+copy.  If there are multiple Invariant Sections with the same name but
+different contents, make the title of each such section unique by
+adding at the end of it, in parentheses, the name of the original
+author or publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list of
+Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections Entitled "History"
+in the various original documents, forming one section Entitled
+"History"; likewise combine any sections Entitled "Acknowledgements",
+and any sections Entitled "Dedications".  You must delete all sections
+Entitled "Endorsements".
+
+6. COLLECTIONS OF DOCUMENTS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+You may make a collection consisting of the Document and other documents
+released under this License, and replace the individual copies of this
+License in the various documents with a single copy that is included in
+the collection, provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+7. AGGREGATION WITH INDEPENDENT WORKS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A compilation of the Document or its derivatives with other separate
+and independent documents or works, in or on a volume of a storage or
+distribution medium, is called an "aggregate" if the copyright
+resulting from the compilation is not used to limit the legal rights
+of the compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License does not
+apply to the other works in the aggregate which are not themselves
+derivative works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to these
+copies of the Document, then if the Document is less than one half of
+the entire aggregate, the Document's Cover Texts may be placed on
+covers that bracket the Document within the aggregate, or the
+electronic equivalent of covers if the Document is in electronic form.
+Otherwise they must appear on printed covers that bracket the whole
+aggregate.
+
+8. TRANSLATION
+~~~~~~~~~~~~~~
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of section 4.
+Replacing Invariant Sections with translations requires special
+permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections.  You may include a
+translation of this License, and all the license notices in the
+Document, and any Warranty Disclaimers, provided that you also include
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+of those notices and disclaimers.  In case of a disagreement between
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+or disclaimer, the original version will prevail.
+
+If a section in the Document is Entitled "Acknowledgements",
+"Dedications", or "History", the requirement (section 4) to Preserve
+its Title (section 1) will typically require changing the actual
+title.
+
+9. TERMINATION
+~~~~~~~~~~~~~~
+
+You may not copy, modify, sublicense, or distribute the Document
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense, or distribute it is void, and
+will automatically terminate your rights under this License.
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, receipt of a copy of some or all of the same material does
+not give you any rights to use it.
+
+10. FUTURE REVISIONS OF THIS LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The Free Software Foundation may publish new, revised versions
+of the GNU Free Documentation License from time to time.  Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.  See
+https://www.gnu.org/copyleft/.
+
+Each version of the License is given a distinguishing version number.
+If the Document specifies that a particular numbered version of this
+License "or any later version" applies to it, you have the option of
+following the terms and conditions either of that specified version or
+of any later version that has been published (not as a draft) by the
+Free Software Foundation.  If the Document does not specify a version
+number of this License, you may choose any version ever published (not
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+specifies that a proxy can decide which future versions of this
+License can be used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version for the
+Document.
+
+11. RELICENSING
+~~~~~~~~~~~~~~~
+
+"Massive Multiauthor Collaboration Site" (or "MMC Site") means any
+World Wide Web server that publishes copyrightable works and also
+provides prominent facilities for anybody to edit those works.  A
+public wiki that anybody can edit is an example of such a server.  A
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+site means any set of copyrightable works thus published on the MMC
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+
+"CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
+license published by Creative Commons Corporation, a not-for-profit
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+California, as well as future copyleft versions of that license
+published by that same organization.
+
+"Incorporate" means to publish or republish a Document, in whole or
+in part, as part of another Document.
+
+An MMC is "eligible for relicensing" if it is licensed under this
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+somewhere other than this MMC, and subsequently incorporated in whole
+or in part into the MMC, (1) had no cover texts or invariant sections,
+and (2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained in the site
+under CC-BY-SA on the same site at any time before August 1, 2009,
+provided the MMC is eligible for relicensing.
+
+ADDENDUM: How to use this License for your documents
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and
+license notices just after the title page:
+
+    Copyright © YEAR  YOUR NAME.
+    Permission is granted to copy, distribute and/or modify this document
+    under the terms of the GNU Free Documentation License, Version 1.3
+    or any later version published by the Free Software Foundation;
+    with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+    A copy of the license is included in the section entitled "GNU
+    Free Documentation License".
+
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the "with ... Texts." line with this:
+
+    with the Invariant Sections being LIST THEIR TITLES, with the
+    Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
+
+If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of
+free software license, such as the GNU General Public License,
+to permit their use in free software.
\ No newline at end of file
diff --git a/doc/gpl-3.0.rst b/doc/gpl-3.0.rst
new file mode 100644
index 00000000000..07ffd72b375
--- /dev/null
+++ b/doc/gpl-3.0.rst
@@ -0,0 +1,707 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU GENERAL PUBLIC LICENSE
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Version 3, 29 June 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+########
+
+The GNU General Public License is a free, copyleft license for software
+and other kinds of works.
+
+The licenses for most software and other practical works are designed to
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+
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+you modify it: responsibilities to respect the freedom of others.
+
+For example, if you distribute copies of such a program, whether gratis
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+Developers that use the GNU GPL protect your rights with two steps: (1)
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+The precise terms and conditions for copying, distribution and
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+
+TERMS AND CONDITIONS
+####################
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+0. Definitions.
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+"This License" refers to version 3 of the GNU General Public License.
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+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+7. Additional Terms.
+^^^^^^^^^^^^^^^^^^^^
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+"Additional permissions" are terms that supplement the terms of this
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+10. Automatic Licensing of Downstream Recipients.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+
+How to Apply These Terms to Your New Programs
+#############################################
+
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+
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+        You should have received a copy of the GNU General Public License
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+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice
+like this when it starts in an interactive mode:
+
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+
+        <program>  Copyright (C) <year>  <name of author>
+        This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+        This is free software, and you are welcome to redistribute it
+        under certain conditions; type `show c' for details.
+
+The hypothetical commands \`show w' and \`show c' should show the
+appropriate parts of the General Public License. Of course, your
+program's commands might be different; for a GUI interface, you would
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+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow the
+GNU GPL, see https://www.gnu.org/licenses/.
+
+The GNU General Public License does not permit incorporating your
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+GNU Lesser General Public License instead of this License. But first,
+please read https://www.gnu.org/licenses/why-not-lgpl.html.
\ No newline at end of file
diff --git a/doc/indices-and-tables.rst b/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..92bf73bcb0a
--- /dev/null
+++ b/doc/indices-and-tables.rst
@@ -0,0 +1,13 @@
+.. only:: html
+
+  Indexes and tables
+  ==================
+
+  :ref:`genindex`
+
+  .. only:: development
+
+    TODO
+    ----
+
+    .. todolist::
\ No newline at end of file
diff --git a/doc/lgpl-2.1.rst b/doc/lgpl-2.1.rst
new file mode 100644
index 00000000000..845de30d8d4
--- /dev/null
+++ b/doc/lgpl-2.1.rst
@@ -0,0 +1,514 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+GNU LESSER GENERAL PUBLIC LICENSE
+---------------------------------
+
+.. index:: LGPL, Lesser General Public License
+
+Version 2.1, February 1999
+
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+    Copyright (C) year  name of author
+
+    This library is free software; you can redistribute it and/or modify it
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+
+    This library is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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+
+    You should have received a copy of the GNU Lesser General Public
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+    USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a 'copyright disclaimer' for the library, if
+necessary.  Here is a sample; alter the names:
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+.. code-block::
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+    Yoyodyne, Inc., hereby disclaims all copyright interest in the library
+    `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+    signature of Ty Coon, 1 April 1990
+    Ty Coon, President of Vice
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+That's all there is to it!
\ No newline at end of file
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diff --git a/doc/md.rst b/doc/md.rst
new file mode 100644
index 00000000000..55e0711113e
--- /dev/null
+++ b/doc/md.rst
@@ -0,0 +1,3142 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: simple constraints
+
+.. _simple-constraints:
+
+Simple Constraints
+^^^^^^^^^^^^^^^^^^
+
+The simplest kind of constraint is a string full of letters, each of
+which describes one kind of operand that is permitted.  Here are
+the letters that are allowed:
+
+whitespace
+  Whitespace characters are ignored and can be inserted at any position
+  except the first.  This enables each alternative for different operands to
+  be visually aligned in the machine description even if they have different
+  number of constraints and modifiers.
+
+  .. index:: m in constraint, memory references in constraints
+
+m
+  A memory operand is allowed, with any kind of address that the machine
+  supports in general.
+  Note that the letter used for the general memory constraint can be
+  re-defined by a back end using the ``TARGET_MEM_CONSTRAINT`` macro.
+
+  .. index:: offsettable address, o in constraint
+
+o
+  A memory operand is allowed, but only if the address is
+  :dfn:`offsettable`.  This means that adding a small integer (actually,
+  the width in bytes of the operand, as determined by its machine mode)
+  may be added to the address and the result is also a valid memory
+  address.
+
+  .. index:: autoincrement/decrement addressing
+
+  For example, an address which is constant is offsettable; so is an
+  address that is the sum of a register and a constant (as long as a
+  slightly larger constant is also within the range of address-offsets
+  supported by the machine); but an autoincrement or autodecrement
+  address is not offsettable.  More complicated indirect/indexed
+  addresses may or may not be offsettable depending on the other
+  addressing modes that the machine supports.
+
+  Note that in an output operand which can be matched by another
+  operand, the constraint letter :samp:`o` is valid only when accompanied
+  by both :samp:`<` (if the target machine has predecrement addressing)
+  and :samp:`>` (if the target machine has preincrement addressing).
+
+  .. index:: V in constraint
+
+V
+  A memory operand that is not offsettable.  In other words, anything that
+  would fit the :samp:`m` constraint but not the :samp:`o` constraint.
+
+  .. index:: < in constraint
+
+<
+  A memory operand with autodecrement addressing (either predecrement or
+  postdecrement) is allowed.  In inline ``asm`` this constraint is only
+  allowed if the operand is used exactly once in an instruction that can
+  handle the side effects.  Not using an operand with :samp:`<` in constraint
+  string in the inline ``asm`` pattern at all or using it in multiple
+  instructions isn't valid, because the side effects wouldn't be performed
+  or would be performed more than once.  Furthermore, on some targets
+  the operand with :samp:`<` in constraint string must be accompanied by
+  special instruction suffixes like ``%U0`` instruction suffix on PowerPC
+  or ``%P0`` on IA-64.
+
+  .. index:: > in constraint
+
+>
+  A memory operand with autoincrement addressing (either preincrement or
+  postincrement) is allowed.  In inline ``asm`` the same restrictions
+  as for :samp:`<` apply.
+
+  .. index:: r in constraint, registers in constraints
+
+r
+  A register operand is allowed provided that it is in a general
+  register.
+
+  .. index:: constants in constraints, i in constraint
+
+i
+  An immediate integer operand (one with constant value) is allowed.
+  This includes symbolic constants whose values will be known only at
+  assembly time or later.
+
+  .. index:: n in constraint
+
+n
+  An immediate integer operand with a known numeric value is allowed.
+  Many systems cannot support assembly-time constants for operands less
+  than a word wide.  Constraints for these operands should use :samp:`n`
+  rather than :samp:`i`.
+
+  .. index:: I in constraint
+
+:samp:`{I}, {J}, {K}, ... {P}`
+  Other letters in the range :samp:`I` through :samp:`P` may be defined in
+  a machine-dependent fashion to permit immediate integer operands with
+  explicit integer values in specified ranges.  For example, on the
+  68000, :samp:`I` is defined to stand for the range of values 1 to 8.
+  This is the range permitted as a shift count in the shift
+  instructions.
+
+  .. index:: E in constraint
+
+E
+  An immediate floating operand (expression code ``const_double``) is
+  allowed, but only if the target floating point format is the same as
+  that of the host machine (on which the compiler is running).
+
+  .. index:: F in constraint
+
+F
+  An immediate floating operand (expression code ``const_double`` or
+  ``const_vector``) is allowed.
+
+  .. index:: G in constraint, H in constraint
+
+:samp:`{G}, {H}`
+  :samp:`G` and :samp:`H` may be defined in a machine-dependent fashion to
+  permit immediate floating operands in particular ranges of values.
+
+  .. index:: s in constraint
+
+s
+  An immediate integer operand whose value is not an explicit integer is
+  allowed.
+
+  This might appear strange; if an insn allows a constant operand with a
+  value not known at compile time, it certainly must allow any known
+  value.  So why use :samp:`s` instead of :samp:`i`?  Sometimes it allows
+  better code to be generated.
+
+  For example, on the 68000 in a fullword instruction it is possible to
+  use an immediate operand; but if the immediate value is between -128
+  and 127, better code results from loading the value into a register and
+  using the register.  This is because the load into the register can be
+  done with a :samp:`moveq` instruction.  We arrange for this to happen
+  by defining the letter :samp:`K` to mean 'any integer outside the
+  range -128 to 127', and then specifying :samp:`Ks` in the operand
+  constraints.
+
+  .. index:: g in constraint
+
+g
+  Any register, memory or immediate integer operand is allowed, except for
+  registers that are not general registers.
+
+  .. index:: X in constraint
+
+X
+
+  .. only:: gccint
+
+    Any operand whatsoever is allowed, even if it does not satisfy
+    ``general_operand``.  This is normally used in the constraint of
+    a ``match_scratch`` when certain alternatives will not actually
+    require a scratch register.
+
+  .. only:: not gccint
+
+    Any operand whatsoever is allowed.
+
+  .. index:: 0 in constraint, digits in constraint
+
+:samp:`{0}, {1}, {2}, ... {9}`
+  An operand that matches the specified operand number is allowed.  If a
+  digit is used together with letters within the same alternative, the
+  digit should come last.
+
+  This number is allowed to be more than a single digit.  If multiple
+  digits are encountered consecutively, they are interpreted as a single
+  decimal integer.  There is scant chance for ambiguity, since to-date
+  it has never been desirable that :samp:`10` be interpreted as matching
+  either operand 1 *or* operand 0.  Should this be desired, one
+  can use multiple alternatives instead.
+
+  .. index:: matching constraint, constraint, matching
+
+  This is called a :dfn:`matching constraint` and what it really means is
+  that the assembler has only a single operand that fills two roles
+
+  .. only:: gccint
+
+    considered separate in the RTL insn.  For example, an add insn has two
+    input operands and one output operand in the RTL, but on most CISC
+
+  .. only:: not gccint
+
+    which ``asm`` distinguishes.  For example, an add instruction uses
+    two input operands and an output operand, but on most CISC
+
+  machines an add instruction really has only two operands, one of them an
+  input-output operand:
+
+  .. code-block::
+
+    addl #35,r12
+
+  Matching constraints are used in these circumstances.
+  More precisely, the two operands that match must include one input-only
+  operand and one output-only operand.  Moreover, the digit must be a
+  smaller number than the number of the operand that uses it in the
+  constraint.
+
+  .. only:: gccint
+
+    For operands to match in a particular case usually means that they
+    are identical-looking RTL expressions.  But in a few special cases
+    specific kinds of dissimilarity are allowed.  For example, ``*x``
+    as an input operand will match ``*x++`` as an output operand.
+    For proper results in such cases, the output template should always
+    use the output-operand's number when printing the operand.
+
+  .. index:: load address instruction, push address instruction, address constraints, p in constraint
+
+p
+  An operand that is a valid memory address is allowed.  This is
+  for 'load address' and 'push address' instructions.
+
+  .. index:: address_operand
+
+  :samp:`p` in the constraint must be accompanied by ``address_operand``
+  as the predicate in the ``match_operand``.  This predicate interprets
+  the mode specified in the ``match_operand`` as the mode of the memory
+  reference for which the address would be valid.
+
+  .. index:: other register constraints, extensible constraints
+
+other-letters
+  Other letters can be defined in machine-dependent fashion to stand for
+  particular classes of registers or other arbitrary operand types.
+  :samp:`d`, :samp:`a` and :samp:`f` are defined on the 68000/68020 to stand
+  for data, address and floating point registers.
+
+.. only:: gccint
+
+  In order to have valid assembler code, each operand must satisfy
+  its constraint.  But a failure to do so does not prevent the pattern
+  from applying to an insn.  Instead, it directs the compiler to modify
+  the code so that the constraint will be satisfied.  Usually this is
+  done by copying an operand into a register.
+
+  Contrast, therefore, the two instruction patterns that follow:
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_dup 0)
+                     (match_operand:SI 1 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has two operands, one of which must appear in two places, and
+
+  .. code-block:: c++
+
+    (define_insn ""
+      [(set (match_operand:SI 0 "general_operand" "=r")
+            (plus:SI (match_operand:SI 1 "general_operand" "0")
+                     (match_operand:SI 2 "general_operand" "r")))]
+      ""
+      "...")
+
+  which has three operands, two of which are required by a constraint to be
+  identical.  If we are considering an insn of the form
+
+  .. code-block:: c++
+
+    (insn n prev next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 6) (reg:SI 109)))
+      ...)
+
+  the first pattern would not apply at all, because this insn does not
+  contain two identical subexpressions in the right place.  The pattern would
+  say, 'That does not look like an add instruction; try other patterns'.
+  The second pattern would say, 'Yes, that's an add instruction, but there
+  is something wrong with it'.  It would direct the reload pass of the
+  compiler to generate additional insns to make the constraint true.  The
+  results might look like this:
+
+  .. code-block:: c++
+
+    (insn n2 prev n
+      (set (reg:SI 3) (reg:SI 6))
+      ...)
+
+    (insn n n2 next
+      (set (reg:SI 3)
+           (plus:SI (reg:SI 3) (reg:SI 109)))
+      ...)
+
+  It is up to you to make sure that each operand, in each pattern, has
+  constraints that can handle any RTL expression that could be present for
+  that operand.  (When multiple alternatives are in use, each pattern must,
+  for each possible combination of operand expressions, have at least one
+  alternative which can handle that combination of operands.)  The
+  constraints don't need to *allow* any possible operand---when this is
+  the case, they do not constrain---but they must at least point the way to
+  reloading any possible operand so that it will fit.
+
+  * If the constraint accepts whatever operands the predicate permits,
+    there is no problem: reloading is never necessary for this operand.
+
+    For example, an operand whose constraints permit everything except
+    registers is safe provided its predicate rejects registers.
+
+    An operand whose predicate accepts only constant values is safe
+    provided its constraints include the letter :samp:`i`.  If any possible
+    constant value is accepted, then nothing less than :samp:`i` will do;
+    if the predicate is more selective, then the constraints may also be
+    more selective.
+
+  * Any operand expression can be reloaded by copying it into a register.
+    So if an operand's constraints allow some kind of register, it is
+    certain to be safe.  It need not permit all classes of registers; the
+    compiler knows how to copy a register into another register of the
+    proper class in order to make an instruction valid.
+
+    .. index:: nonoffsettable memory reference, memory reference, nonoffsettable
+
+  * A nonoffsettable memory reference can be reloaded by copying the
+    address into a register.  So if the constraint uses the letter
+    :samp:`o`, all memory references are taken care of.
+
+  * A constant operand can be reloaded by allocating space in memory to
+    hold it as preinitialized data.  Then the memory reference can be used
+    in place of the constant.  So if the constraint uses the letters
+    :samp:`o` or :samp:`m`, constant operands are not a problem.
+
+  * If the constraint permits a constant and a pseudo register used in an insn
+    was not allocated to a hard register and is equivalent to a constant,
+    the register will be replaced with the constant.  If the predicate does
+    not permit a constant and the insn is re-recognized for some reason, the
+    compiler will crash.  Thus the predicate must always recognize any
+    objects allowed by the constraint.
+
+  If the operand's predicate can recognize registers, but the constraint does
+  not permit them, it can make the compiler crash.  When this operand happens
+  to be a register, the reload pass will be stymied, because it does not know
+  how to copy a register temporarily into memory.
+
+  If the predicate accepts a unary operator, the constraint applies to the
+  operand.  For example, the MIPS processor at ISA level 3 supports an
+  instruction which adds two registers in ``SImode`` to produce a
+  ``DImode`` result, but only if the registers are correctly sign
+  extended.  This predicate for the input operands accepts a
+  ``sign_extend`` of an ``SImode`` register.  Write the constraint
+  to indicate the type of register that is required for the operand of the
+  ``sign_extend``.
+
+.. only:: not gccint
+
+  So the first alternative for the 68000's logical-or could be written as
+  ``"+m" (output) : "ir" (input)``.  The second could be ``"+r"
+  (output): "irm" (input)``.  However, the fact that two memory locations
+  cannot be used in a single instruction prevents simply using ``"+rm"
+  (output) : "irm" (input)``.  Using multi-alternatives, this might be
+  written as ``"+m,r" (output) : "ir,irm" (input)``.  This describes
+  all the available alternatives to the compiler, allowing it to choose
+  the most efficient one for the current conditions.
+
+  There is no way within the template to determine which alternative was
+  chosen.  However you may be able to wrap your ``asm`` statements with
+  builtins such as ``__builtin_constant_p`` to achieve the desired results.
+
+.. index:: multiple alternative constraints
+
+.. _multi-alternative:
+
+Multiple Alternative Constraints
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Sometimes a single instruction has multiple alternative sets of possible
+operands.  For example, on the 68000, a logical-or instruction can combine
+register or an immediate value into memory, or it can combine any kind of
+operand into a register; but it cannot combine one memory location into
+another.
+
+These constraints are represented as multiple alternatives.  An alternative
+can be described by a series of letters for each operand.  The overall
+constraint for an operand is made from the letters for this operand
+from the first alternative, a comma, the letters for this operand from
+the second alternative, a comma, and so on until the last alternative.
+All operands for a single instruction must have the same number of
+alternatives.
+
+.. only:: gccint
+
+  Here is how it is done for fullword logical-or on the 68000:
+
+  .. code-block:: c++
+
+    (define_insn "iorsi3"
+      [(set (match_operand:SI 0 "general_operand" "=m,d")
+            (ior:SI (match_operand:SI 1 "general_operand" "%0,0")
+                    (match_operand:SI 2 "general_operand" "dKs,dmKs")))]
+      ...)
+
+  The first alternative has :samp:`m` (memory) for operand 0, :samp:`0` for
+  operand 1 (meaning it must match operand 0), and :samp:`dKs` for operand
+  2.  The second alternative has :samp:`d` (data register) for operand 0,
+  :samp:`0` for operand 1, and :samp:`dmKs` for operand 2.  The :samp:`=` and
+  :samp:`%` in the constraints apply to all the alternatives; their
+  meaning is explained in the next section (see :ref:`class-preferences`).
+
+  If all the operands fit any one alternative, the instruction is valid.
+  Otherwise, for each alternative, the compiler counts how many instructions
+  must be added to copy the operands so that that alternative applies.
+  The alternative requiring the least copying is chosen.  If two alternatives
+  need the same amount of copying, the one that comes first is chosen.
+  These choices can be altered with the :samp:`?` and :samp:`!` characters:
+
+  .. index:: ? in constraint, question mark
+
+  ``?``
+    Disparage slightly the alternative that the :samp:`?` appears in,
+    as a choice when no alternative applies exactly.  The compiler regards
+    this alternative as one unit more costly for each :samp:`?` that appears
+    in it.
+
+    .. index:: ! in constraint, exclamation point
+
+  ``!``
+    Disparage severely the alternative that the :samp:`!` appears in.
+    This alternative can still be used if it fits without reloading,
+    but if reloading is needed, some other alternative will be used.
+
+    .. index:: ^ in constraint, caret
+
+  ``^``
+    This constraint is analogous to :samp:`?` but it disparages slightly
+    the alternative only if the operand with the :samp:`^` needs a reload.
+
+    .. index:: $ in constraint, dollar sign
+
+  ``$``
+    This constraint is analogous to :samp:`!` but it disparages severely
+    the alternative only if the operand with the :samp:`$` needs a reload.
+
+  When an insn pattern has multiple alternatives in its constraints, often
+  the appearance of the assembler code is determined mostly by which
+  alternative was matched.  When this is so, the C code for writing the
+  assembler code can use the variable ``which_alternative``, which is
+  the ordinal number of the alternative that was actually satisfied (0 for
+  the first, 1 for the second alternative, etc.).  See :ref:`output-statement`.
+
+.. _class-preferences:
+
+Register Class Preferences
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. only:: gccint
+
+  .. index:: class preference constraints, register class preference constraints, voting between constraint alternatives
+
+  The operand constraints have another function: they enable the compiler
+  to decide which kind of hardware register a pseudo register is best
+  allocated to.  The compiler examines the constraints that apply to the
+  insns that use the pseudo register, looking for the machine-dependent
+  letters such as :samp:`d` and :samp:`a` that specify classes of registers.
+  The pseudo register is put in whichever class gets the most 'votes'.
+  The constraint letters :samp:`g` and :samp:`r` also vote: they vote in
+  favor of a general register.  The machine description says which registers
+  are considered general.
+
+  Of course, on some machines all registers are equivalent, and no register
+  classes are defined.  Then none of this complexity is relevant.
+
+.. index:: modifiers in constraints, constraint modifier characters
+
+.. _modifiers:
+
+Constraint Modifier Characters
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. prevent bad page break with this line
+
+Here are constraint modifier characters.
+
+.. index:: = in constraint
+
+:samp:`=`
+  Means that this operand is written to by this instruction:
+  the previous value is discarded and replaced by new data.
+
+  .. index:: + in constraint
+
+:samp:`+`
+  Means that this operand is both read and written by the instruction.
+
+  When the compiler fixes up the operands to satisfy the constraints,
+  it needs to know which operands are read by the instruction and
+  which are written by it.  :samp:`=` identifies an operand which is only
+  written; :samp:`+` identifies an operand that is both read and written; all
+  other operands are assumed to only be read.
+
+  If you specify :samp:`=` or :samp:`+` in a constraint, you put it in the
+  first character of the constraint string.
+
+  .. index:: & in constraint, earlyclobber operand
+
+:samp:`&`
+  Means (in a particular alternative) that this operand is an
+  :dfn:`earlyclobber` operand, which is written before the instruction is
+  finished using the input operands.  Therefore, this operand may not lie
+  in a register that is read by the instruction or as part of any memory
+  address.
+
+  :samp:`&` applies only to the alternative in which it is written.  In
+  constraints with multiple alternatives, sometimes one alternative
+  requires :samp:`&` while others do not.  See, for example, the
+  :samp:`movdf` insn of the 68000.
+
+  An operand which is read by the instruction can be tied to an earlyclobber
+  operand if its only use as an input occurs before the early result is
+  written.  Adding alternatives of this form often allows GCC to produce
+  better code when only some of the read operands can be affected by the
+  earlyclobber. See, for example, the :samp:`mulsi3` insn of the ARM.
+
+  Furthermore, if the :dfn:`earlyclobber` operand is also a read/write
+  operand, then that operand is written only after it's used.
+
+  :samp:`&` does not obviate the need to write :samp:`=` or :samp:`+`.  As
+  :dfn:`earlyclobber` operands are always written, a read-only
+  :dfn:`earlyclobber` operand is ill-formed and will be rejected by the
+  compiler.
+
+  .. index:: % in constraint
+
+:samp:`%`
+  Declares the instruction to be commutative for this operand and the
+  following operand.  This means that the compiler may interchange the
+  two operands if that is the cheapest way to make all operands fit the
+  constraints.  :samp:`%` applies to all alternatives and must appear as
+  the first character in the constraint.  Only read-only operands can use
+  :samp:`%`.
+
+  .. only:: gccint
+
+    This is often used in patterns for addition instructions
+    that really have only two operands: the result must go in one of the
+    arguments.  Here for example, is how the 68000 halfword-add
+    instruction is defined:
+
+    .. code-block:: c++
+
+      (define_insn "addhi3"
+        [(set (match_operand:HI 0 "general_operand" "=m,r")
+           (plus:HI (match_operand:HI 1 "general_operand" "%0,0")
+                    (match_operand:HI 2 "general_operand" "di,g")))]
+        ...)
+
+  GCC can only handle one commutative pair in an asm; if you use more,
+  the compiler may fail.  Note that you need not use the modifier if
+  the two alternatives are strictly identical; this would only waste
+  time in the reload pass.
+
+  .. only:: gccint
+
+    The modifier is not operational after
+    register allocation, so the result of ``define_peephole2``
+    and ``define_split`` s performed after reload cannot rely on
+    :samp:`%` to make the intended insn match.
+
+    .. index:: # in constraint
+
+  :samp:`#`
+    Says that all following characters, up to the next comma, are to be
+    ignored as a constraint.  They are significant only for choosing
+    register preferences.
+
+    .. index:: * in constraint
+
+  :samp:`*`
+    Says that the following character should be ignored when choosing
+    register preferences.  :samp:`*` has no effect on the meaning of the
+    constraint as a constraint, and no effect on reloading.  For LRA
+    :samp:`*` additionally disparages slightly the alternative if the
+    following character matches the operand.
+
+    Here is an example: the 68000 has an instruction to sign-extend a
+    halfword in a data register, and can also sign-extend a value by
+    copying it into an address register.  While either kind of register is
+    acceptable, the constraints on an address-register destination are
+    less strict, so it is best if register allocation makes an address
+    register its goal.  Therefore, :samp:`*` is used so that the :samp:`d`
+    constraint letter (for data register) is ignored when computing
+    register preferences.
+
+    .. code-block:: c++
+
+      (define_insn "extendhisi2"
+        [(set (match_operand:SI 0 "general_operand" "=*d,a")
+              (sign_extend:SI
+               (match_operand:HI 1 "general_operand" "0,g")))]
+        ...)
+
+.. index:: machine specific constraints, constraints, machine specific
+
+.. _machine-constraints:
+
+Constraints for Particular Machines
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Whenever possible, you should use the general-purpose constraint letters
+in ``asm`` arguments, since they will convey meaning more readily to
+people reading your code.  Failing that, use the constraint letters
+that usually have very similar meanings across architectures.  The most
+commonly used constraints are :samp:`m` and :samp:`r` (for memory and
+general-purpose registers respectively; see :ref:`simple-constraints`), and
+:samp:`I`, usually the letter indicating the most common
+immediate-constant format.
+
+Each architecture defines additional constraints.  These constraints
+are used by the compiler itself for instruction generation, as well as
+for ``asm`` statements; therefore, some of the constraints are not
+particularly useful for ``asm``.  Here is a summary of some of the
+machine-dependent constraints available on some particular machines;
+it includes both constraints that are useful for ``asm`` and
+constraints that aren't.  The compiler source file mentioned in the
+table heading for each architecture is the definitive reference for
+the meanings of that architecture's constraints.
+
+.. Please keep this table alphabetized by target!
+
+AArch64 family---:samp:`{config/aarch64/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``k``
+  The stack pointer register (``SP``)
+
+``w``
+  Floating point register, Advanced SIMD vector register or SVE vector register
+
+``x``
+  Like ``w``, but restricted to registers 0 to 15 inclusive.
+
+``y``
+  Like ``w``, but restricted to registers 0 to 7 inclusive.
+
+``Upl``
+  One of the low eight SVE predicate registers (``P0`` to ``P7``)
+
+``Upa``
+  Any of the SVE predicate registers (``P0`` to ``P15``)
+
+``I``
+  Integer constant that is valid as an immediate operand in an ``ADD``
+  instruction
+
+``J``
+  Integer constant that is valid as an immediate operand in a ``SUB``
+  instruction (once negated)
+
+``K``
+  Integer constant that can be used with a 32-bit logical instruction
+
+``L``
+  Integer constant that can be used with a 64-bit logical instruction
+
+``M``
+  Integer constant that is valid as an immediate operand in a 32-bit ``MOV``
+  pseudo instruction. The ``MOV`` may be assembled to one of several different
+  machine instructions depending on the value
+
+``N``
+  Integer constant that is valid as an immediate operand in a 64-bit ``MOV``
+  pseudo instruction
+
+``S``
+  An absolute symbolic address or a label reference
+
+``Y``
+  Floating point constant zero
+
+``Z``
+  Integer constant zero
+
+``Ush``
+  The high part (bits 12 and upwards) of the pc-relative address of a symbol
+  within 4GB of the instruction
+
+``Q``
+  A memory address which uses a single base register with no offset
+
+``Ump``
+  A memory address suitable for a load/store pair instruction in SI, DI, SF and
+  DF modes
+
+AMD GCN ---:samp:`{config/gcn/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Immediate integer in the range -16 to 64
+
+``J``
+  Immediate 16-bit signed integer
+
+``Kf``
+  Immediate constant -1
+
+``L``
+  Immediate 15-bit unsigned integer
+
+``A``
+  Immediate constant that can be inlined in an instruction encoding: integer
+  -16..64, or float 0.0, +/-0.5, +/-1.0, +/-2.0,
+  +/-4.0, 1.0/(2.0\*PI)
+
+``B``
+  Immediate 32-bit signed integer that can be attached to an instruction encoding
+
+``C``
+  Immediate 32-bit integer in range -16..4294967295 (i.e. 32-bit unsigned
+  integer or :samp:`A` constraint)
+
+``DA``
+  Immediate 64-bit constant that can be split into two :samp:`A` constants
+
+``DB``
+  Immediate 64-bit constant that can be split into two :samp:`B` constants
+
+``U``
+  Any ``unspec``
+
+``Y``
+  Any ``symbol_ref`` or ``label_ref``
+
+``v``
+  VGPR register
+
+``Sg``
+  SGPR register
+
+``SD``
+  SGPR registers valid for instruction destinations, including VCC, M0 and EXEC
+
+``SS``
+  SGPR registers valid for instruction sources, including VCC, M0, EXEC and SCC
+
+``Sm``
+  SGPR registers valid as a source for scalar memory instructions (excludes M0
+  and EXEC)
+
+``Sv``
+  SGPR registers valid as a source or destination for vector instructions
+  (excludes EXEC)
+
+``ca``
+  All condition registers: SCC, VCCZ, EXECZ
+
+``cs``
+  Scalar condition register: SCC
+
+``cV``
+  Vector condition register: VCC, VCC_LO, VCC_HI
+
+``e``
+  EXEC register (EXEC_LO and EXEC_HI)
+
+``RB``
+  Memory operand with address space suitable for ``buffer_*`` instructions
+
+``RF``
+  Memory operand with address space suitable for ``flat_*`` instructions
+
+``RS``
+  Memory operand with address space suitable for ``s_*`` instructions
+
+``RL``
+  Memory operand with address space suitable for ``ds_*`` LDS instructions
+
+``RG``
+  Memory operand with address space suitable for ``ds_*`` GDS instructions
+
+``RD``
+  Memory operand with address space suitable for any ``ds_*`` instructions
+
+``RM``
+  Memory operand with address space suitable for ``global_*`` instructions
+
+ARC ---:samp:`{config/arc/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``q``
+  Registers usable in ARCompact 16-bit instructions: ``r0`` - ``r3``,
+  ``r12`` - ``r15``.  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``e``
+  Registers usable as base-regs of memory addresses in ARCompact 16-bit memory
+  instructions: ``r0`` - ``r3``, ``r12`` - ``r15``, ``sp``.
+  This constraint can only match when the :option:`-mq`
+  option is in effect.
+
+``D``
+  ARC FPX (dpfp) 64-bit registers. ``D0``, ``D1``.
+
+``I``
+  A signed 12-bit integer constant.
+
+``Cal``
+  constant for arithmetic/logical operations.  This might be any constant
+  that can be put into a long immediate by the assmbler or linker without
+  involving a PIC relocation.
+
+``K``
+  A 3-bit unsigned integer constant.
+
+``L``
+  A 6-bit unsigned integer constant.
+
+``CnL``
+  One's complement of a 6-bit unsigned integer constant.
+
+``CmL``
+  Two's complement of a 6-bit unsigned integer constant.
+
+``M``
+  A 5-bit unsigned integer constant.
+
+``O``
+  A 7-bit unsigned integer constant.
+
+``P``
+  A 8-bit unsigned integer constant.
+
+``H``
+  Any const_double value.
+
+ARM family---:samp:`{config/arm/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``h``
+  In Thumb state, the core registers ``r8`` - ``r15``.
+
+``k``
+  The stack pointer register.
+
+``l``
+  In Thumb State the core registers ``r0`` - ``r7``.  In ARM state this
+  is an alias for the ``r`` constraint.
+
+``t``
+  VFP floating-point registers ``s0`` - ``s31``.  Used for 32 bit values.
+
+``w``
+  VFP floating-point registers ``d0`` - ``d31`` and the appropriate
+  subset ``d0`` - ``d15`` based on command line options.
+  Used for 64 bit values only.  Not valid for Thumb1.
+
+``y``
+  The iWMMX co-processor registers.
+
+``z``
+  The iWMMX GR registers.
+
+``G``
+  The floating-point constant 0.0
+
+``I``
+  Integer that is valid as an immediate operand in a data processing
+  instruction.  That is, an integer in the range 0 to 255 rotated by a
+  multiple of 2
+
+``J``
+  Integer in the range -4095 to 4095
+
+``K``
+  Integer that satisfies constraint :samp:`I` when inverted (ones complement)
+
+``L``
+  Integer that satisfies constraint :samp:`I` when negated (twos complement)
+
+``M``
+  Integer in the range 0 to 32
+
+``Q``
+  A memory reference where the exact address is in a single register
+  (':samp:`m`' is preferable for ``asm`` statements)
+
+``R``
+  An item in the constant pool
+
+``S``
+  A symbol in the text segment of the current file
+
+``Uv``
+  A memory reference suitable for VFP load/store insns (reg+constant offset)
+
+``Uy``
+  A memory reference suitable for iWMMXt load/store instructions.
+
+``Uq``
+  A memory reference suitable for the ARMv4 ldrsb instruction.
+
+AVR family---:samp:`{config/avr/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``l``
+  Registers from r0 to r15
+
+``a``
+  Registers from r16 to r23
+
+``d``
+  Registers from r16 to r31
+
+``w``
+  Registers from r24 to r31.  These registers can be used in :samp:`adiw` command
+
+``e``
+  Pointer register (r26--r31)
+
+``b``
+  Base pointer register (r28--r31)
+
+``q``
+  Stack pointer register (SPH:SPL)
+
+``t``
+  Temporary register r0
+
+``x``
+  Register pair X (r27:r26)
+
+``y``
+  Register pair Y (r29:r28)
+
+``z``
+  Register pair Z (r31:r30)
+
+``I``
+  Constant greater than -1, less than 64
+
+``J``
+  Constant greater than -64, less than 1
+
+``K``
+  Constant integer 2
+
+``L``
+  Constant integer 0
+
+``M``
+  Constant that fits in 8 bits
+
+``N``
+  Constant integer -1
+
+``O``
+  Constant integer 8, 16, or 24
+
+``P``
+  Constant integer 1
+
+``G``
+  A floating point constant 0.0
+
+``Q``
+  A memory address based on Y or Z pointer with displacement.
+
+Blackfin family---:samp:`{config/bfin/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  P register
+
+``d``
+  D register
+
+``z``
+  A call clobbered P register.
+
+:samp:`q{n}`
+  A single register.  If :samp:`{n}` is in the range 0 to 7, the corresponding D
+  register.  If it is ``A``, then the register P0.
+
+``D``
+  Even-numbered D register
+
+``W``
+  Odd-numbered D register
+
+``e``
+  Accumulator register.
+
+``A``
+  Even-numbered accumulator register.
+
+``B``
+  Odd-numbered accumulator register.
+
+``b``
+  I register
+
+``v``
+  B register
+
+``f``
+  M register
+
+``c``
+  Registers used for circular buffering, i.e. I, B, or L registers.
+
+``C``
+  The CC register.
+
+``t``
+  LT0 or LT1.
+
+``k``
+  LC0 or LC1.
+
+``u``
+  LB0 or LB1.
+
+``x``
+  Any D, P, B, M, I or L register.
+
+``y``
+  Additional registers typically used only in prologues and epilogues: RETS,
+  RETN, RETI, RETX, RETE, ASTAT, SEQSTAT and USP.
+
+``w``
+  Any register except accumulators or CC.
+
+``Ksh``
+  Signed 16 bit integer (in the range -32768 to 32767)
+
+``Kuh``
+  Unsigned 16 bit integer (in the range 0 to 65535)
+
+``Ks7``
+  Signed 7 bit integer (in the range -64 to 63)
+
+``Ku7``
+  Unsigned 7 bit integer (in the range 0 to 127)
+
+``Ku5``
+  Unsigned 5 bit integer (in the range 0 to 31)
+
+``Ks4``
+  Signed 4 bit integer (in the range -8 to 7)
+
+``Ks3``
+  Signed 3 bit integer (in the range -3 to 4)
+
+``Ku3``
+  Unsigned 3 bit integer (in the range 0 to 7)
+
+:samp:`P{n}`
+  Constant :samp:`{n}`, where :samp:`{n}` is a single-digit constant in the range 0 to 4.
+
+``PA``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use with either accumulator.
+
+``PB``
+  An integer equal to one of the MACFLAG_XXX constants that is suitable for
+  use only with accumulator A1.
+
+``M1``
+  Constant 255.
+
+``M2``
+  Constant 65535.
+
+``J``
+  An integer constant with exactly a single bit set.
+
+``L``
+  An integer constant with all bits set except exactly one.
+
+``H``, ``Q``
+
+  Any SYMBOL_REF.
+
+C-SKY---:samp:`{config/csky/constraints.md}`
+
+``a``
+  The mini registers r0 - r7.
+
+``b``
+  The low registers r0 - r15.
+
+``c``
+  C register.
+
+``y``
+  HI and LO registers.
+
+``l``
+  LO register.
+
+``h``
+  HI register.
+
+``v``
+  Vector registers.
+
+``z``
+  Stack pointer register (SP).
+
+``Q``
+  A memory address which uses a base register with a short offset
+  or with a index register with its scale.
+
+``W``
+  A memory address which uses a base register with a index register
+  with its scale.
+
+.. only:: gccint
+
+  The C-SKY back end supports a large set of additional constraints
+  that are only useful for instruction selection or splitting rather
+  than inline asm, such as constraints representing constant integer
+  ranges accepted by particular instruction encodings.
+  Refer to the source code for details.
+
+Epiphany---:samp:`{config/epiphany/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``U16``
+  An unsigned 16-bit constant.
+
+``K``
+  An unsigned 5-bit constant.
+
+``L``
+  A signed 11-bit constant.
+
+``Cm1``
+  A signed 11-bit constant added to -1.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cl1``
+  Left-shift of -1, i.e., a bit mask with a block of leading ones, the rest
+  being a block of trailing zeroes.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cr1``
+  Right-shift of -1, i.e., a bit mask with a trailing block of ones, the
+  rest being zeroes.  Or to put it another way, one less than a power of two.
+  Can only match when the :option:`-m1reg-reg` option is active.
+
+``Cal``
+  Constant for arithmetic/logical operations.
+  This is like ``i``, except that for position independent code,
+  no symbols / expressions needing relocations are allowed.
+
+``Csy``
+  Symbolic constant for call/jump instruction.
+
+``Rcs``
+  The register class usable in short insns.  This is a register class
+  constraint, and can thus drive register allocation.
+  This constraint won't match unless :option:`-mprefer-short-insn-regs` is
+  in effect.
+
+``Rsc``
+  The register class of registers that can be used to hold a
+  sibcall call address.  I.e., a caller-saved register.
+
+``Rct``
+  Core control register class.
+
+``Rgs``
+  The register group usable in short insns.
+  This constraint does not use a register class, so that it only
+  passively matches suitable registers, and doesn't drive register allocation.
+
+.. only:: gccint
+
+  ``Car``
+    Constant suitable for the addsi3_r pattern.  This is a valid offset
+    For byte, halfword, or word addressing.
+
+``Rra``
+  Matches the return address if it can be replaced with the link register.
+
+``Rcc``
+  Matches the integer condition code register.
+
+``Sra``
+  Matches the return address if it is in a stack slot.
+
+``Cfm``
+  Matches control register values to switch fp mode, which are encapsulated in
+  ``UNSPEC_FP_MODE``.
+
+FRV---:samp:`{config/frv/frv.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register in the class ``ACC_REGS`` (``acc0`` to ``acc7``).
+
+``b``
+  Register in the class ``EVEN_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``c``
+  Register in the class ``CC_REGS`` (``fcc0`` to ``fcc3`` and
+  ``icc0`` to ``icc3``).
+
+``d``
+  Register in the class ``GPR_REGS`` (``gr0`` to ``gr63``).
+
+``e``
+  Register in the class ``EVEN_REGS`` (``gr0`` to ``gr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``f``
+  Register in the class ``FPR_REGS`` (``fr0`` to ``fr63``).
+
+``h``
+  Register in the class ``FEVEN_REGS`` (``fr0`` to ``fr63``).
+  Odd registers are excluded not in the class but through the use of a machine
+  mode larger than 4 bytes.
+
+``l``
+  Register in the class ``LR_REG`` (the ``lr`` register).
+
+``q``
+  Register in the class ``QUAD_REGS`` (``gr2`` to ``gr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``t``
+  Register in the class ``ICC_REGS`` (``icc0`` to ``icc3``).
+
+``u``
+  Register in the class ``FCC_REGS`` (``fcc0`` to ``fcc3``).
+
+``v``
+  Register in the class ``ICR_REGS`` (``cc4`` to ``cc7``).
+
+``w``
+  Register in the class ``FCR_REGS`` (``cc0`` to ``cc3``).
+
+``x``
+  Register in the class ``QUAD_FPR_REGS`` (``fr0`` to ``fr63``).
+  Register numbers not divisible by 4 are excluded not in the class but through
+  the use of a machine mode larger than 8 bytes.
+
+``z``
+  Register in the class ``SPR_REGS`` (``lcr`` and ``lr``).
+
+``A``
+  Register in the class ``QUAD_ACC_REGS`` (``acc0`` to ``acc7``).
+
+``B``
+  Register in the class ``ACCG_REGS`` (``accg0`` to ``accg7``).
+
+``C``
+  Register in the class ``CR_REGS`` (``cc0`` to ``cc7``).
+
+``G``
+  Floating point constant zero
+
+``I``
+  6-bit signed integer constant
+
+``J``
+  10-bit signed integer constant
+
+``L``
+  16-bit signed integer constant
+
+``M``
+  16-bit unsigned integer constant
+
+``N``
+  12-bit signed integer constant that is negative---i.e. in the
+  range of -2048 to -1
+
+``O``
+  Constant zero
+
+``P``
+  12-bit signed integer constant that is greater than zero---i.e. in the
+  range of 1 to 2047.
+
+FT32---:samp:`{config/ft32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``e``
+  An offset address.
+
+``f``
+  An offset address.
+
+``O``
+  The constant zero or one
+
+``I``
+  A 16-bit signed constant (-32768 ... 32767)
+
+``w``
+  A bitfield mask suitable for bext or bins
+
+``x``
+  An inverted bitfield mask suitable for bext or bins
+
+``L``
+  A 16-bit unsigned constant, multiple of 4 (0 ... 65532)
+
+``S``
+  A 20-bit signed constant (-524288 ... 524287)
+
+``b``
+  A constant for a bitfield width (1 ... 16)
+
+``KA``
+  A 10-bit signed constant (-512 ... 511)
+
+Hewlett-Packard PA-RISC---:samp:`{config/pa/pa.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register 1
+
+``f``
+  Floating point register
+
+``q``
+  Shift amount register
+
+``x``
+  Floating point register (deprecated)
+
+``y``
+  Upper floating point register (32-bit), floating point register (64-bit)
+
+``Z``
+  Any register
+
+``I``
+  Signed 11-bit integer constant
+
+``J``
+  Signed 14-bit integer constant
+
+``K``
+  Integer constant that can be deposited with a ``zdepi`` instruction
+
+``L``
+  Signed 5-bit integer constant
+
+``M``
+  Integer constant 0
+
+``N``
+  Integer constant that can be loaded with a ``ldil`` instruction
+
+``O``
+  Integer constant whose value plus one is a power of 2
+
+``P``
+  Integer constant that can be used for ``and`` operations in ``depi``
+  and ``extru`` instructions
+
+``S``
+  Integer constant 31
+
+``U``
+  Integer constant 63
+
+``G``
+  Floating-point constant 0.0
+
+``A``
+  A ``lo_sum`` data-linkage-table memory operand
+
+``Q``
+  A memory operand that can be used as the destination operand of an
+  integer store instruction
+
+``R``
+  A scaled or unscaled indexed memory operand
+
+``T``
+  A memory operand for floating-point loads and stores
+
+``W``
+  A register indirect memory operand
+
+Intel IA-64---:samp:`{config/ia64/ia64.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General register ``r0`` to ``r3`` for ``addl`` instruction
+
+``b``
+  Branch register
+
+``c``
+  Predicate register (:samp:`c` as in 'conditional')
+
+``d``
+  Application register residing in M-unit
+
+``e``
+  Application register residing in I-unit
+
+``f``
+  Floating-point register
+
+``m``
+  Memory operand.  If used together with :samp:`<` or :samp:`>`,
+  the operand can have postincrement and postdecrement which
+  require printing with :samp:`%Pn` on IA-64.
+
+``G``
+  Floating-point constant 0.0 or 1.0
+
+``I``
+  14-bit signed integer constant
+
+``J``
+  22-bit signed integer constant
+
+``K``
+  8-bit signed integer constant for logical instructions
+
+``L``
+  8-bit adjusted signed integer constant for compare pseudo-ops
+
+``M``
+  6-bit unsigned integer constant for shift counts
+
+``N``
+  9-bit signed integer constant for load and store postincrements
+
+``O``
+  The constant zero
+
+``P``
+  0 or -1 for ``dep`` instruction
+
+``Q``
+  Non-volatile memory for floating-point loads and stores
+
+``R``
+  Integer constant in the range 1 to 4 for ``shladd`` instruction
+
+``S``
+  Memory operand except postincrement and postdecrement.  This is
+  now roughly the same as :samp:`m` when not used together with :samp:`<`
+  or :samp:`>`.
+
+M32C---:samp:`{config/m32c/m32c.cc}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Rsp`` ``Rfb`` ``Rsb``
+  :samp:`$sp`, :samp:`$fb`, :samp:`$sb`.
+
+``Rcr``
+  Any control register, when they're 16 bits wide (nothing if control
+  registers are 24 bits wide)
+
+``Rcl``
+  Any control register, when they're 24 bits wide.
+
+``R0w`` ``R1w`` ``R2w`` ``R3w``
+  $r0, $r1, $r2, $r3.
+
+``R02``
+  $r0 or $r2, or $r2r0 for 32 bit values.
+
+``R13``
+  $r1 or $r3, or $r3r1 for 32 bit values.
+
+``Rdi``
+  A register that can hold a 64 bit value.
+
+``Rhl``
+  $r0 or $r1 (registers with addressable high/low bytes)
+
+``R23``
+  $r2 or $r3
+
+``Raa``
+  Address registers
+
+``Raw``
+  Address registers when they're 16 bits wide.
+
+``Ral``
+  Address registers when they're 24 bits wide.
+
+``Rqi``
+  Registers that can hold QI values.
+
+``Rad``
+  Registers that can be used with displacements ($a0, $a1, $sb).
+
+``Rsi``
+  Registers that can hold 32 bit values.
+
+``Rhi``
+  Registers that can hold 16 bit values.
+
+``Rhc``
+  Registers chat can hold 16 bit values, including all control
+  registers.
+
+``Rra``
+  $r0 through R1, plus $a0 and $a1.
+
+``Rfl``
+  The flags register.
+
+``Rmm``
+  The memory-based pseudo-registers $mem0 through $mem15.
+
+``Rpi``
+  Registers that can hold pointers (16 bit registers for r8c, m16c; 24
+  bit registers for m32cm, m32c).
+
+``Rpa``
+  Matches multiple registers in a PARALLEL to form a larger register.
+  Used to match function return values.
+
+``Is3``
+  -8 ... 7
+
+``IS1``
+  -128 ... 127
+
+``IS2``
+  -32768 ... 32767
+
+``IU2``
+  0 ... 65535
+
+``In4``
+  -8 ... -1 or 1 ... 8
+
+``In5``
+  -16 ... -1 or 1 ... 16
+
+``In6``
+  -32 ... -1 or 1 ... 32
+
+``IM2``
+  -65536 ... -1
+
+``Ilb``
+  An 8 bit value with exactly one bit set.
+
+``Ilw``
+  A 16 bit value with exactly one bit set.
+
+``Sd``
+  The common src/dest memory addressing modes.
+
+``Sa``
+  Memory addressed using $a0 or $a1.
+
+``Si``
+  Memory addressed with immediate addresses.
+
+``Ss``
+  Memory addressed using the stack pointer ($sp).
+
+``Sf``
+  Memory addressed using the frame base register ($fb).
+
+``Ss``
+  Memory addressed using the small base register ($sb).
+
+``S1``
+  $r1h
+
+LoongArch---:samp:`{config/loongarch/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``k``
+  A memory operand whose address is formed by a base register and
+  (optionally scaled) index register.
+
+``l``
+  A signed 16-bit constant.
+
+``m``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``st.w`` and ``ld.w``.
+
+``I``
+  A signed 12-bit constant (for arithmetic instructions).
+
+``K``
+  An unsigned 12-bit constant (for logic instructions).
+
+``ZB``
+  An address that is held in a general-purpose register.
+  The offset is zero.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll.w`` and ``sc.w``.
+
+MicroBlaze---:samp:`{config/microblaze/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general register (``r0`` to ``r31``).
+
+``z``
+  A status register (``rmsr``, ``$fcc1`` to ``$fcc7``).
+
+MIPS---:samp:`{config/mips/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``d``
+  A general-purpose register.  This is equivalent to ``r`` unless
+  generating MIPS16 code, in which case the MIPS16 register set is used.
+
+``f``
+  A floating-point register (if available).
+
+``h``
+  Formerly the ``hi`` register.  This constraint is no longer supported.
+
+``l``
+  The ``lo`` register.  Use this register to store values that are
+  no bigger than a word.
+
+``x``
+  The concatenated ``hi`` and ``lo`` registers.  Use this register
+  to store doubleword values.
+
+``c``
+  A register suitable for use in an indirect jump.  This will always be
+  ``$25`` for :option:`-mabicalls`.
+
+``v``
+  Register ``$3``.  Do not use this constraint in new code;
+  it is retained only for compatibility with glibc.
+
+``y``
+  Equivalent to ``r`` ; retained for backwards compatibility.
+
+``z``
+  A floating-point condition code register.
+
+``I``
+  A signed 16-bit constant (for arithmetic instructions).
+
+``J``
+  Integer zero.
+
+``K``
+  An unsigned 16-bit constant (for logic instructions).
+
+``L``
+  A signed 32-bit constant in which the lower 16 bits are zero.
+  Such constants can be loaded using ``lui``.
+
+``M``
+  A constant that cannot be loaded using ``lui``, ``addiu``
+  or ``ori``.
+
+``N``
+  A constant in the range -65535 to -1 (inclusive).
+
+``O``
+  A signed 15-bit constant.
+
+``P``
+  A constant in the range 1 to 65535 (inclusive).
+
+``G``
+  Floating-point zero.
+
+``R``
+  An address that can be used in a non-macro load or store.
+
+``ZC``
+  A memory operand whose address is formed by a base register and offset
+  that is suitable for use in instructions with the same addressing mode
+  as ``ll`` and ``sc``.
+
+``ZD``
+  An address suitable for a ``prefetch`` instruction, or for any other
+  instruction with the same addressing mode as ``prefetch``.
+
+Motorola 680x0---:samp:`{config/m68k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register
+
+``d``
+  Data register
+
+``f``
+  68881 floating-point register, if available
+
+``I``
+  Integer in the range 1 to 8
+
+``J``
+  16-bit signed number
+
+``K``
+  Signed number whose magnitude is greater than 0x80
+
+``L``
+  Integer in the range -8 to -1
+
+``M``
+  Signed number whose magnitude is greater than 0x100
+
+``N``
+  Range 24 to 31, rotatert:SI 8 to 1 expressed as rotate
+
+``O``
+  16 (for rotate using swap)
+
+``P``
+  Range 8 to 15, rotatert:HI 8 to 1 expressed as rotate
+
+``R``
+  Numbers that mov3q can handle
+
+``G``
+  Floating point constant that is not a 68881 constant
+
+``S``
+  Operands that satisfy 'm' when -mpcrel is in effect
+
+``T``
+  Operands that satisfy 's' when -mpcrel is not in effect
+
+``Q``
+  Address register indirect addressing mode
+
+``U``
+  Register offset addressing
+
+``W``
+  const_call_operand
+
+``Cs``
+  symbol_ref or const
+
+``Ci``
+  const_int
+
+``C0``
+  const_int 0
+
+``Cj``
+  Range of signed numbers that don't fit in 16 bits
+
+``Cmvq``
+  Integers valid for mvq
+
+``Capsw``
+  Integers valid for a moveq followed by a swap
+
+``Cmvz``
+  Integers valid for mvz
+
+``Cmvs``
+  Integers valid for mvs
+
+``Ap``
+  push_operand
+
+``Ac``
+  Non-register operands allowed in clr
+
+Moxie---:samp:`{config/moxie/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``A``
+  An absolute address
+
+``B``
+  An offset address
+
+``W``
+  A register indirect memory operand
+
+``I``
+  A constant in the range of 0 to 255.
+
+``N``
+  A constant in the range of 0 to -255.
+
+MSP430---:samp:`{config/msp430/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R12``
+  Register R12.
+
+``R13``
+  Register R13.
+
+``K``
+  Integer constant 1.
+
+``L``
+  Integer constant -1^20..1^19.
+
+``M``
+  Integer constant 1-4.
+
+``Ya``
+  Memory references which do not require an extended MOVX instruction.
+
+``Yl``
+  Memory reference, labels only.
+
+``Ys``
+  Memory reference, stack only.
+
+NDS32---:samp:`{config/nds32/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``w``
+  LOW register class $r0 to $r7 constraint for V3/V3M ISA.
+
+``l``
+  LOW register class $r0 to $r7.
+
+``d``
+  MIDDLE register class $r0 to $r11, $r16 to $r19.
+
+``h``
+  HIGH register class $r12 to $r14, $r20 to $r31.
+
+``t``
+  Temporary assist register $ta (i.e. $r15).
+
+``k``
+  Stack register $sp.
+
+``Iu03``
+  Unsigned immediate 3-bit value.
+
+``In03``
+  Negative immediate 3-bit value in the range of -7--0.
+
+``Iu04``
+  Unsigned immediate 4-bit value.
+
+``Is05``
+  Signed immediate 5-bit value.
+
+``Iu05``
+  Unsigned immediate 5-bit value.
+
+``In05``
+  Negative immediate 5-bit value in the range of -31--0.
+
+``Ip05``
+  Unsigned immediate 5-bit value for movpi45 instruction with range 16--47.
+
+``Iu06``
+  Unsigned immediate 6-bit value constraint for addri36.sp instruction.
+
+``Iu08``
+  Unsigned immediate 8-bit value.
+
+``Iu09``
+  Unsigned immediate 9-bit value.
+
+``Is10``
+  Signed immediate 10-bit value.
+
+``Is11``
+  Signed immediate 11-bit value.
+
+``Is15``
+  Signed immediate 15-bit value.
+
+``Iu15``
+  Unsigned immediate 15-bit value.
+
+``Ic15``
+  A constant which is not in the range of imm15u but ok for bclr instruction.
+
+``Ie15``
+  A constant which is not in the range of imm15u but ok for bset instruction.
+
+``It15``
+  A constant which is not in the range of imm15u but ok for btgl instruction.
+
+``Ii15``
+  A constant whose compliment value is in the range of imm15u
+  and ok for bitci instruction.
+
+``Is16``
+  Signed immediate 16-bit value.
+
+``Is17``
+  Signed immediate 17-bit value.
+
+``Is19``
+  Signed immediate 19-bit value.
+
+``Is20``
+  Signed immediate 20-bit value.
+
+``Ihig``
+  The immediate value that can be simply set high 20-bit.
+
+``Izeb``
+  The immediate value 0xff.
+
+``Izeh``
+  The immediate value 0xffff.
+
+``Ixls``
+  The immediate value 0x01.
+
+``Ix11``
+  The immediate value 0x7ff.
+
+``Ibms``
+  The immediate value with power of 2.
+
+``Ifex``
+  The immediate value with power of 2 minus 1.
+
+``U33``
+  Memory constraint for 333 format.
+
+``U45``
+  Memory constraint for 45 format.
+
+``U37``
+  Memory constraint for 37 format.
+
+Nios II family---:samp:`{config/nios2/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``J``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking only the upper 16-bits of a
+  32-bit number. Range 32-bit numbers with the lower
+  16-bits being 0.
+
+``L``
+  Integer that is valid as an immediate operand for a
+  shift instruction. Range 0 to 31.
+
+``M``
+  Integer that is valid as an immediate operand for
+  only the value 0. Can be used in conjunction with
+  the format modifier ``z`` to use ``r0``
+  instead of ``0`` in the assembly output.
+
+``N``
+  Integer that is valid as an immediate operand for
+  a custom instruction opcode. Range 0 to 255.
+
+``P``
+  An immediate operand for R2 andchi/andci instructions.
+
+``S``
+  Matches immediates which are addresses in the small
+  data section and therefore can be added to ``gp``
+  as a 16-bit immediate to re-create their 32-bit value.
+
+``U``
+  Matches constants suitable as an operand for the rdprs and
+  cache instructions.
+
+``v``
+  A memory operand suitable for Nios II R2 load/store
+  exclusive instructions.
+
+``w``
+  A memory operand suitable for load/store IO and cache
+  instructions.
+
+.. only:: gccint
+
+  ``T``
+    A ``const`` wrapped ``UNSPEC`` expression,
+    representing a supported PIC or TLS relocation.
+
+OpenRISC---:samp:`{config/or1k/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  Integer that is valid as an immediate operand in an
+  instruction taking a signed 16-bit number. Range
+  -32768 to 32767.
+
+``K``
+  Integer that is valid as an immediate operand in an
+  instruction taking an unsigned 16-bit number. Range
+  0 to 65535.
+
+``M``
+  Signed 16-bit constant shifted left 16 bits. (Used with ``l.movhi``)
+
+``O``
+  Zero
+
+.. only:: gccint
+
+  ``c``
+    Register usable for sibcalls.
+
+PDP-11---:samp:`{config/pdp11/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Floating point registers AC0 through AC3.  These can be loaded from/to
+  memory with a single instruction.
+
+``d``
+  Odd numbered general registers (R1, R3, R5).  These are used for
+  16-bit multiply operations.
+
+``D``
+  A memory reference that is encoded within the opcode, but not
+  auto-increment or auto-decrement.
+
+``f``
+  Any of the floating point registers (AC0 through AC5).
+
+``G``
+  Floating point constant 0.
+
+``h``
+  Floating point registers AC4 and AC5.  These cannot be loaded from/to
+  memory with a single instruction.
+
+``I``
+  An integer constant that fits in 16 bits.
+
+``J``
+  An integer constant whose low order 16 bits are zero.
+
+``K``
+  An integer constant that does not meet the constraints for codes
+  :samp:`I` or :samp:`J`.
+
+``L``
+  The integer constant 1.
+
+``M``
+  The integer constant -1.
+
+``N``
+  The integer constant 0.
+
+``O``
+  Integer constants 0 through 3; shifts by these
+  amounts are handled as multiple single-bit shifts rather than a single
+  variable-length shift.
+
+``Q``
+  A memory reference which requires an additional word (address or
+  offset) after the opcode.
+
+``R``
+  A memory reference that is encoded within the opcode.
+
+PowerPC and IBM RS6000---:samp:`{config/rs6000/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``r``
+  A general purpose register (GPR), ``r0``... ``r31``.
+
+``b``
+  A base register.  Like ``r``, but ``r0`` is not allowed, so
+  ``r1``... ``r31``.
+
+``f``
+  A floating point register (FPR), ``f0``... ``f31``.
+
+``d``
+  A floating point register.  This is the same as ``f`` nowadays;
+  historically ``f`` was for single-precision and ``d`` was for
+  double-precision floating point.
+
+``v``
+  An Altivec vector register (VR), ``v0``... ``v31``.
+
+``wa``
+  A VSX register (VSR), ``vs0``... ``vs63``.  This is either an
+  FPR (``vs0``... ``vs31`` are ``f0``... ``f31``) or a VR
+  (``vs32``... ``vs63`` are ``v0``... ``v31``).
+
+  When using ``wa``, you should use the ``%x`` output modifier, so that
+  the correct register number is printed.  For example:
+
+  .. code-block:: c++
+
+    asm ("xvadddp %x0,%x1,%x2"
+         : "=wa" (v1)
+         : "wa" (v2), "wa" (v3));
+
+  You should not use ``%x`` for ``v`` operands:
+
+  .. code-block:: c++
+
+    asm ("xsaddqp %0,%1,%2"
+         : "=v" (v1)
+         : "v" (v2), "v" (v3));
+
+.. only:: gccint
+
+  ``h``
+    A special register (``vrsave``, ``ctr``, or ``lr``).
+
+``c``
+  The count register, ``ctr``.
+
+``l``
+  The link register, ``lr``.
+
+``x``
+  Condition register field 0, ``cr0``.
+
+``y``
+  Any condition register field, ``cr0``... ``cr7``.
+
+.. only:: gccint
+
+  ``z``
+    The carry bit, ``XER[CA]``.
+
+  ``we``
+    Like ``wa``, if :option:`-mpower9-vector` and :option:`-m64` are used;
+    otherwise, ``NO_REGS``.
+
+  ``wn``
+    No register (``NO_REGS``).
+
+  ``wr``
+    Like ``r``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wx``
+    Like ``d``, if :option:`-mpowerpc-gfxopt` is used; otherwise, ``NO_REGS``.
+
+  ``wA``
+    Like ``b``, if :option:`-mpowerpc64` is used; otherwise, ``NO_REGS``.
+
+  ``wB``
+    Signed 5-bit constant integer that can be loaded into an Altivec register.
+
+  ``wE``
+    Vector constant that can be loaded with the XXSPLTIB instruction.
+
+  ``wF``
+    Memory operand suitable for power8 GPR load fusion.
+
+  ``wL``
+    Int constant that is the element number mfvsrld accesses in a vector.
+
+  ``wM``
+    Match vector constant with all 1's if the XXLORC instruction is available.
+
+  ``wO``
+    Memory operand suitable for the ISA 3.0 vector d-form instructions.
+
+  ``wQ``
+    Memory operand suitable for the load/store quad instructions.
+
+  ``wS``
+    Vector constant that can be loaded with XXSPLTIB & sign extension.
+
+  ``wY``
+    A memory operand for a DS-form instruction.
+
+  ``wZ``
+    An indexed or indirect memory operand, ignoring the bottom 4 bits.
+
+``I``
+  A signed 16-bit constant.
+
+``J``
+  An unsigned 16-bit constant shifted left 16 bits (use ``L`` instead
+  for ``SImode`` constants).
+
+``K``
+  An unsigned 16-bit constant.
+
+``L``
+  A signed 16-bit constant shifted left 16 bits.
+
+.. only:: gccint
+
+  ``M``
+    An integer constant greater than 31.
+
+  ``N``
+    An exact power of 2.
+
+  ``O``
+    The integer constant zero.
+
+  ``P``
+    A constant whose negation is a signed 16-bit constant.
+
+``eI``
+  A signed 34-bit integer constant if prefixed instructions are supported.
+
+``eQ``
+  An IEEE 128-bit constant that can be loaded into a VSX register with
+  the ``lxvkq`` instruction.
+
+.. only:: gccint
+
+  ``G``
+    A floating point constant that can be loaded into a register with one
+    instruction per word.
+
+  ``H``
+    A floating point constant that can be loaded into a register using
+    three instructions.
+
+``m``
+  A memory operand.
+  Normally, ``m`` does not allow addresses that update the base register.
+  If the ``<`` or ``>`` constraint is also used, they are allowed and
+  therefore on PowerPC targets in that case it is only safe
+  to use ``m<>`` in an ``asm`` statement if that ``asm`` statement
+  accesses the operand exactly once.  The ``asm`` statement must also
+  use ``%U<opno>`` as a placeholder for the 'update' flag in the
+  corresponding load or store instruction.  For example:
+
+  .. code-block:: c++
+
+    asm ("st%U0 %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is correct but:
+
+  .. code-block:: c++
+
+    asm ("st %1,%0" : "=m<>" (mem) : "r" (val));
+
+  is not.
+
+.. only:: gccint
+
+  ``es``
+    A 'stable' memory operand; that is, one which does not include any
+    automodification of the base register.  This used to be useful when
+    ``m`` allowed automodification of the base register, but as those
+    are now only allowed when ``<`` or ``>`` is used, ``es`` is
+    basically the same as ``m`` without ``<`` and ``>``.
+
+``Q``
+  A memory operand addressed by just a base register.
+
+.. only:: gccint
+
+  ``Y``
+    A memory operand for a DQ-form instruction.
+
+``Z``
+  A memory operand accessed with indexed or indirect addressing.
+
+.. only:: gccint
+
+  ``R``
+    An AIX TOC entry.
+
+``a``
+  An indexed or indirect address.
+
+.. only:: gccint
+
+  ``U``
+    A V.4 small data reference.
+
+  ``W``
+    A vector constant that does not require memory.
+
+  ``j``
+    The zero vector constant.
+
+PRU---:samp:`{config/pru/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``I``
+  An unsigned 8-bit integer constant.
+
+``J``
+  An unsigned 16-bit integer constant.
+
+``L``
+  An unsigned 5-bit integer constant (for shift counts).
+
+``T``
+  A text segment (program memory) constant label.
+
+``Z``
+  Integer constant zero.
+
+RL78---:samp:`{config/rl78/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Int3``
+  An integer constant in the range 1 ... 7.
+
+``Int8``
+  An integer constant in the range 0 ... 255.
+
+``J``
+  An integer constant in the range -255 ... 0
+
+``K``
+  The integer constant 1.
+
+``L``
+  The integer constant -1.
+
+``M``
+  The integer constant 0.
+
+``N``
+  The integer constant 2.
+
+``O``
+  The integer constant -2.
+
+``P``
+  An integer constant in the range 1 ... 15.
+
+``Qbi``
+  The built-in compare types--eq, ne, gtu, ltu, geu, and leu.
+
+``Qsc``
+  The synthetic compare types--gt, lt, ge, and le.
+
+``Wab``
+  A memory reference with an absolute address.
+
+``Wbc``
+  A memory reference using ``BC`` as a base register, with an optional offset.
+
+``Wca``
+  A memory reference using ``AX``, ``BC``, ``DE``, or ``HL`` for the address, for calls.
+
+``Wcv``
+  A memory reference using any 16-bit register pair for the address, for calls.
+
+``Wd2``
+  A memory reference using ``DE`` as a base register, with an optional offset.
+
+``Wde``
+  A memory reference using ``DE`` as a base register, without any offset.
+
+``Wfr``
+  Any memory reference to an address in the far address space.
+
+``Wh1``
+  A memory reference using ``HL`` as a base register, with an optional one-byte offset.
+
+``Whb``
+  A memory reference using ``HL`` as a base register, with ``B`` or ``C`` as the index register.
+
+``Whl``
+  A memory reference using ``HL`` as a base register, without any offset.
+
+``Ws1``
+  A memory reference using ``SP`` as a base register, with an optional one-byte offset.
+
+``Y``
+  Any memory reference to an address in the near address space.
+
+``A``
+  The ``AX`` register.
+
+``B``
+  The ``BC`` register.
+
+``D``
+  The ``DE`` register.
+
+``R``
+  ``A`` through ``L`` registers.
+
+``S``
+  The ``SP`` register.
+
+``T``
+  The ``HL`` register.
+
+``Z08W``
+  The 16-bit ``R8`` register.
+
+``Z10W``
+  The 16-bit ``R10`` register.
+
+``Zint``
+  The registers reserved for interrupts (``R24`` to ``R31``).
+
+``a``
+  The ``A`` register.
+
+``b``
+  The ``B`` register.
+
+``c``
+  The ``C`` register.
+
+``d``
+  The ``D`` register.
+
+``e``
+  The ``E`` register.
+
+``h``
+  The ``H`` register.
+
+``l``
+  The ``L`` register.
+
+``v``
+  The virtual registers.
+
+``w``
+  The ``PSW`` register.
+
+``x``
+  The ``X`` register.
+
+RISC-V---:samp:`{config/riscv/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  A floating-point register (if available).
+
+``I``
+  An I-type 12-bit signed immediate.
+
+``J``
+  Integer zero.
+
+``K``
+  A 5-bit unsigned immediate for CSR access instructions.
+
+``A``
+  An address that is held in a general-purpose register.
+
+``S``
+  A constraint that matches an absolute symbolic address.
+
+RX---:samp:`{config/rx/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``Q``
+  An address which does not involve register indirect addressing or
+  pre/post increment/decrement addressing.
+
+``Symbol``
+  A symbol reference.
+
+``Int08``
+  A constant in the range -256 to 255, inclusive.
+
+``Sint08``
+  A constant in the range -128 to 127, inclusive.
+
+``Sint16``
+  A constant in the range -32768 to 32767, inclusive.
+
+``Sint24``
+  A constant in the range -8388608 to 8388607, inclusive.
+
+``Uint04``
+  A constant in the range 0 to 15, inclusive.
+
+S/390 and zSeries---:samp:`{config/s390/s390.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Address register (general purpose register except r0)
+
+``c``
+  Condition code register
+
+``d``
+  Data register (arbitrary general purpose register)
+
+``f``
+  Floating-point register
+
+``I``
+  Unsigned 8-bit constant (0--255)
+
+``J``
+  Unsigned 12-bit constant (0--4095)
+
+``K``
+  Signed 16-bit constant (-32768--32767)
+
+``L``
+  Value appropriate as displacement.
+
+  ``(0..4095)``
+    for short displacement
+
+  ``(-524288..524287)``
+    for long displacement
+
+``M``
+  Constant integer with a value of 0x7fffffff.
+
+``N``
+  Multiple letter constraint followed by 4 parameter letters.
+
+  ``0..9:``
+    number of the part counting from most to least significant
+
+  ``H,Q:``
+    mode of the part
+
+  ``D,S,H:``
+    mode of the containing operand
+
+  ``0,F:``
+    value of the other parts (F---all bits set)
+
+  The constraint matches if the specified part of a constant
+  has a value different from its other parts.
+
+``Q``
+  Memory reference without index register and with short displacement.
+
+``R``
+  Memory reference with index register and short displacement.
+
+``S``
+  Memory reference without index register but with long displacement.
+
+``T``
+  Memory reference with index register and long displacement.
+
+``U``
+  Pointer with short displacement.
+
+``W``
+  Pointer with long displacement.
+
+``Y``
+  Shift count operand.
+
+SPARC---:samp:`{config/sparc/sparc.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``f``
+  Floating-point register on the SPARC-V8 architecture and
+  lower floating-point register on the SPARC-V9 architecture.
+
+``e``
+  Floating-point register.  It is equivalent to :samp:`f` on the
+  SPARC-V8 architecture and contains both lower and upper
+  floating-point registers on the SPARC-V9 architecture.
+
+``c``
+  Floating-point condition code register.
+
+``d``
+  Lower floating-point register.  It is only valid on the SPARC-V9
+  architecture when the Visual Instruction Set is available.
+
+``b``
+  Floating-point register.  It is only valid on the SPARC-V9 architecture
+  when the Visual Instruction Set is available.
+
+``h``
+  64-bit global or out register for the SPARC-V8+ architecture.
+
+``C``
+  The constant all-ones, for floating-point.
+
+``A``
+  Signed 5-bit constant
+
+``D``
+  A vector constant
+
+``I``
+  Signed 13-bit constant
+
+``J``
+  Zero
+
+``K``
+  32-bit constant with the low 12 bits clear (a constant that can be
+  loaded with the ``sethi`` instruction)
+
+``L``
+  A constant in the range supported by ``movcc`` instructions (11-bit
+  signed immediate)
+
+``M``
+  A constant in the range supported by ``movrcc`` instructions (10-bit
+  signed immediate)
+
+``N``
+  Same as :samp:`K`, except that it verifies that bits that are not in the
+  lower 32-bit range are all zero.  Must be used instead of :samp:`K` for
+  modes wider than ``SImode``
+
+``O``
+  The constant 4096
+
+``G``
+  Floating-point zero
+
+``H``
+  Signed 13-bit constant, sign-extended to 32 or 64 bits
+
+``P``
+  The constant -1
+
+``Q``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single sethi
+  instruction
+
+``R``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a single mov
+  instruction
+
+``S``
+  Floating-point constant whose integral representation can
+  be moved into an integer register using a high/lo_sum
+  instruction sequence
+
+``T``
+  Memory address aligned to an 8-byte boundary
+
+``U``
+  Even register
+
+``W``
+  Memory address for :samp:`e` constraint registers
+
+``w``
+  Memory address with only a base register
+
+``Y``
+  Vector zero
+
+TI C6X family---:samp:`{config/c6x/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register file A (A0--A31).
+
+``b``
+  Register file B (B0--B31).
+
+``A``
+  Predicate registers in register file A (A0--A2 on C64X and
+  higher, A1 and A2 otherwise).
+
+``B``
+  Predicate registers in register file B (B0--B2).
+
+``C``
+  A call-used register in register file B (B0--B9, B16--B31).
+
+``Da``
+  Register file A, excluding predicate registers (A3--A31,
+  plus A0 if not C64X or higher).
+
+``Db``
+  Register file B, excluding predicate registers (B3--B31).
+
+``Iu4``
+  Integer constant in the range 0 ... 15.
+
+``Iu5``
+  Integer constant in the range 0 ... 31.
+
+``In5``
+  Integer constant in the range -31 ... 0.
+
+``Is5``
+  Integer constant in the range -16 ... 15.
+
+``I5x``
+  Integer constant that can be the operand of an ADDA or a SUBA insn.
+
+``IuB``
+  Integer constant in the range 0 ... 65535.
+
+``IsB``
+  Integer constant in the range -32768 ... 32767.
+
+``IsC``
+  Integer constant in the range -2^{20} ... 2^{20} - 1.
+
+``Jc``
+  Integer constant that is a valid mask for the clr instruction.
+
+``Js``
+  Integer constant that is a valid mask for the set instruction.
+
+``Q``
+  Memory location with A base register.
+
+``R``
+  Memory location with B base register.
+
+.. only:: gccint
+
+  ``S0``
+    On C64x+ targets, a GP-relative small data reference.
+
+  ``S1``
+    Any kind of ``SYMBOL_REF``, for use in a call address.
+
+  ``Si``
+    Any kind of immediate operand, unless it matches the S0 constraint.
+
+  ``T``
+    Memory location with B base register, but not using a long offset.
+
+  ``W``
+    A memory operand with an address that cannot be used in an unaligned access.
+
+``Z``
+  Register B14 (aka DP).
+
+Visium---:samp:`{config/visium/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``b``
+  EAM register ``mdb``
+
+``c``
+  EAM register ``mdc``
+
+``f``
+  Floating point register
+
+.. only:: gccint
+
+  ``k``
+    Register for sibcall optimization
+
+``l``
+  General register, but not ``r29``, ``r30`` and ``r31``
+
+``t``
+  Register ``r1``
+
+``u``
+  Register ``r2``
+
+``v``
+  Register ``r3``
+
+``G``
+  Floating-point constant 0.0
+
+``J``
+  Integer constant in the range 0 .. 65535 (16-bit immediate)
+
+``K``
+  Integer constant in the range 1 .. 31 (5-bit immediate)
+
+``L``
+  Integer constant in the range -65535 .. -1 (16-bit negative immediate)
+
+``M``
+  Integer constant -1
+
+``O``
+  Integer constant 0
+
+``P``
+  Integer constant 32
+
+x86 family---:samp:`{config/i386/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``R``
+  Legacy register---the eight integer registers available on all
+  i386 processors (``a``, ``b``, ``c``, ``d``,
+  ``si``, ``di``, ``bp``, ``sp``).
+
+``q``
+  Any register accessible as ``rl``.  In 32-bit mode, ``a``,
+  ``b``, ``c``, and ``d`` ; in 64-bit mode, any integer register.
+
+``Q``
+  Any register accessible as ``rh`` : ``a``, ``b``,
+  ``c``, and ``d``.
+
+.. only:: gccint
+
+  ``l``
+    Any register that can be used as the index in a base+index memory
+    access: that is, any general register except the stack pointer.
+
+``a``
+  The ``a`` register.
+
+``b``
+  The ``b`` register.
+
+``c``
+  The ``c`` register.
+
+``d``
+  The ``d`` register.
+
+``S``
+  The ``si`` register.
+
+``D``
+  The ``di`` register.
+
+``A``
+  The ``a`` and ``d`` registers.  This class is used for instructions
+  that return double word results in the ``ax:dx`` register pair.  Single
+  word values will be allocated either in ``ax`` or ``dx``.
+  For example on i386 the following implements ``rdtsc`` :
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned long long tick;
+      __asm__ __volatile__("rdtsc":"=A"(tick));
+      return tick;
+    }
+
+  This is not correct on x86-64 as it would allocate tick in either ``ax``
+  or ``dx``.  You have to use the following variant instead:
+
+  .. code-block:: c++
+
+    unsigned long long rdtsc (void)
+    {
+      unsigned int tickl, tickh;
+      __asm__ __volatile__("rdtsc":"=a"(tickl),"=d"(tickh));
+      return ((unsigned long long)tickh << 32)|tickl;
+    }
+
+``U``
+  The call-clobbered integer registers.
+
+``f``
+  Any 80387 floating-point (stack) register.
+
+``t``
+  Top of 80387 floating-point stack (``%st(0)``).
+
+``u``
+  Second from top of 80387 floating-point stack (``%st(1)``).
+
+.. only:: gccint
+
+  ``Yk``
+    Any mask register that can be used as a predicate, i.e. ``k1-k7``.
+
+  ``k``
+    Any mask register.
+
+``y``
+  Any MMX register.
+
+``x``
+  Any SSE register.
+
+``v``
+  Any EVEX encodable SSE register (``%xmm0-%xmm31``).
+
+.. only:: gccint
+
+  ``w``
+    Any bound register.
+
+``Yz``
+  First SSE register (``%xmm0``).
+
+.. only:: gccint
+
+  ``Yi``
+    Any SSE register, when SSE2 and inter-unit moves are enabled.
+
+  ``Yj``
+    Any SSE register, when SSE2 and inter-unit moves from vector registers are enabled.
+
+  ``Ym``
+    Any MMX register, when inter-unit moves are enabled.
+
+  ``Yn``
+    Any MMX register, when inter-unit moves from vector registers are enabled.
+
+  ``Yp``
+    Any integer register when ``TARGET_PARTIAL_REG_STALL`` is disabled.
+
+  ``Ya``
+    Any integer register when zero extensions with ``AND`` are disabled.
+
+  ``Yb``
+    Any register that can be used as the GOT base when calling
+
+    ``___tls_get_addr`` : that is, any general register except ``a``
+    and ``sp`` registers, for :option:`-fno-plt` if linker supports it.
+    Otherwise, ``b`` register.
+
+  ``Yf``
+    Any x87 register when 80387 floating-point arithmetic is enabled.
+
+  ``Yr``
+    Lower SSE register when avoiding REX prefix and all SSE registers otherwise.
+
+  ``Yv``
+    For AVX512VL, any EVEX-encodable SSE register (``%xmm0-%xmm31``),
+    otherwise any SSE register.
+
+  ``Yh``
+    Any EVEX-encodable SSE register, that has number factor of four.
+
+  ``Bf``
+    Flags register operand.
+
+  ``Bg``
+    GOT memory operand.
+
+  ``Bm``
+    Vector memory operand.
+
+  ``Bc``
+    Constant memory operand.
+
+``Bn``
+  Memory operand without REX prefix.
+
+``Bs``
+  Sibcall memory operand.
+
+``Bw``
+  Call memory operand.
+
+``Bz``
+  Constant call address operand.
+
+``BC``
+  SSE constant -1 operand.
+
+``I``
+  Integer constant in the range 0 ... 31, for 32-bit shifts.
+
+``J``
+  Integer constant in the range 0 ... 63, for 64-bit shifts.
+
+``K``
+  Signed 8-bit integer constant.
+
+``L``
+  ``0xFF`` or ``0xFFFF``, for andsi as a zero-extending move.
+
+``M``
+  0, 1, 2, or 3 (shifts for the ``lea`` instruction).
+
+``N``
+  Unsigned 8-bit integer constant (for ``in`` and ``out``
+  instructions).
+
+.. only:: gccint
+
+  ``O``
+    Integer constant in the range 0 ... 127, for 128-bit shifts.
+
+``G``
+  Standard 80387 floating point constant.
+
+``C``
+  SSE constant zero operand.
+
+``e``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in sign-extending x86-64
+  instructions).
+
+``We``
+  32-bit signed integer constant, or a symbolic reference known
+  to fit that range (for sign-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wz``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for zero-extending conversion operations that
+  require non- ``VOIDmode`` immediate operands).
+
+``Wd``
+  128-bit integer constant where both the high and low 64-bit word
+  satisfy the ``e`` constraint.
+
+``Z``
+  32-bit unsigned integer constant, or a symbolic reference known
+  to fit that range (for immediate operands in zero-extending x86-64
+  instructions).
+
+``Tv``
+  VSIB address operand.
+
+``Ts``
+  Address operand without segment register.
+
+Xstormy16---:samp:`{config/stormy16/stormy16.h}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  Register r0.
+
+``b``
+  Register r1.
+
+``c``
+  Register r2.
+
+``d``
+  Register r8.
+
+``e``
+  Registers r0 through r7.
+
+``t``
+  Registers r0 and r1.
+
+``y``
+  The carry register.
+
+``z``
+  Registers r8 and r9.
+
+``I``
+  A constant between 0 and 3 inclusive.
+
+``J``
+  A constant that has exactly one bit set.
+
+``K``
+  A constant that has exactly one bit clear.
+
+``L``
+  A constant between 0 and 255 inclusive.
+
+``M``
+  A constant between -255 and 0 inclusive.
+
+``N``
+  A constant between -3 and 0 inclusive.
+
+``O``
+  A constant between 1 and 4 inclusive.
+
+``P``
+  A constant between -4 and -1 inclusive.
+
+``Q``
+  A memory reference that is a stack push.
+
+``R``
+  A memory reference that is a stack pop.
+
+``S``
+  A memory reference that refers to a constant address of known value.
+
+``T``
+  The register indicated by Rx (not implemented yet).
+
+``U``
+  A constant that is not between 2 and 15 inclusive.
+
+``Z``
+  The constant 0.
+
+Xtensa---:samp:`{config/xtensa/constraints.md}`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``a``
+  General-purpose 32-bit register
+
+``b``
+  One-bit boolean register
+
+``A``
+  MAC16 40-bit accumulator register
+
+``I``
+  Signed 12-bit integer constant, for use in MOVI instructions
+
+``J``
+  Signed 8-bit integer constant, for use in ADDI instructions
+
+``K``
+  Integer constant valid for BccI instructions
+
+``L``
+  Unsigned constant valid for BccUI instructions
\ No newline at end of file
diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 00000000000..f5558030ca8
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,3 @@
+Sphinx>=5.3
+furo
+sphinx_copybutton
diff --git a/gcc/d/doc/conf.py b/gcc/d/doc/conf.py
new file mode 100644
index 00000000000..c33f28a2f7f
--- /dev/null
+++ b/gcc/d/doc/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'gdc'
+project = 'The GNU D Compiler'
+copyright = '2006-2022 Free Software Foundation, Inc.'
+authors = 'David Friedman, Iain Buclaw'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invoking-gdc', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/d/doc/copyright.rst b/gcc/d/doc/copyright.rst
new file mode 100644
index 00000000000..5afce611a7a
--- /dev/null
+++ b/gcc/d/doc/copyright.rst
@@ -0,0 +1,13 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is in the :ref:`gnu_fdl`.
\ No newline at end of file
diff --git a/gcc/d/doc/general-public-license-3.rst b/gcc/d/doc/general-public-license-3.rst
new file mode 100644
index 00000000000..becda773ca0
--- /dev/null
+++ b/gcc/d/doc/general-public-license-3.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gpl-3.0.rst
\ No newline at end of file
diff --git a/gcc/d/doc/gnu-free-documentation-license.rst b/gcc/d/doc/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/d/doc/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/d/doc/index.rst b/gcc/d/doc/index.rst
new file mode 100644
index 00000000000..700a4a8d885
--- /dev/null
+++ b/gcc/d/doc/index.rst
@@ -0,0 +1,22 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The GNU D Compiler
+==================
+
+This manual describes how to use :command:`gdc`, the GNU compiler for
+the D programming language.  This manual is specifically about
+:command:`gdc`.  For more information about the D programming
+language in general, including language specifications and standard
+package documentation, see https://dlang.org/.
+
+.. toctree::
+
+  copyright
+  invoking-gdc
+  general-public-license-3
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/d/doc/indices-and-tables.rst b/gcc/d/doc/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/d/doc/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc.rst b/gcc/d/doc/invoking-gdc.rst
new file mode 100644
index 00000000000..be477b82f07
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc.rst
@@ -0,0 +1,48 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _invoking-gdc:
+
+Invoking gdc
+------------
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  gdc [ :option:`-c` | :option:`-S` ] [ :option:`-g` ] [ :option:`-pg` ]
+      [ :option:`-O`:samp:`{level}` ] [ :option:`-W`:samp:`{warn}`...]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-L`:samp:`{dir}`...]
+      [ :option:`-f`:samp:`{option}`...] [ :option:`-m`:samp:`{machine-option}`...]
+      [ :option:`-o` :samp:`{outfile}` ] [@ :samp:`{file}` ] :samp:`{infile}`...
+
+  Only the most useful options are listed here; see below for the
+  remainder.
+
+Description
+^^^^^^^^^^^
+
+The :command:`gdc` command is the GNU compiler for the D language and
+supports many of the same options as :command:`gcc`.  See :ref:`gcc:option-summary`.
+This manual only documents the options specific to :command:`gdc`.
+
+Options
+^^^^^^^
+
+.. toctree::
+  :maxdepth: 2
+
+  invoking-gdc/input-and-output-files
+  invoking-gdc/runtime-options
+  invoking-gdc/options-for-directory-search
+  invoking-gdc/code-generation
+  invoking-gdc/warnings
+  invoking-gdc/options-for-linking
+  invoking-gdc/developer-options
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/code-generation.rst b/gcc/d/doc/invoking-gdc/code-generation.rst
new file mode 100644
index 00000000000..178b6f98fe2
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/code-generation.rst
@@ -0,0 +1,170 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, code generation
+
+.. _code-generation:
+
+Code Generation
+***************
+
+In addition to the many :command:`gcc` options controlling code generation,
+:command:`gdc` has several options specific to itself.
+
+.. option:: -H
+
+  .. index:: -H
+
+  Generates D interface files for all modules being compiled.  The compiler
+  determines the output file based on the name of the input file, removes
+  any directory components and suffix, and applies the :samp:`.di` suffix.
+
+.. option:: -Hd dir
+
+  .. index:: -Hd
+
+  Same as :option:`-H`, but writes interface files to directory :samp:`{dir}`.
+  This option can be used with :option:`-Hf file` to independently set the
+  output file and directory path.
+
+.. option:: -Hf file
+
+  .. index:: -Hf
+
+  Same as :option:`-H` but writes interface files to :samp:`{file}`.  This option can
+  be used with :option:`-Hd dir` to independently set the output file and
+  directory path.
+
+.. option:: -M
+
+  .. index:: -M
+
+  Output the module dependencies of all source files being compiled in a
+  format suitable for :command:`make`.  The compiler outputs one
+  :command:`make` rule containing the object file name for that source file,
+  a colon, and the names of all imported files.
+
+.. option:: -MM
+
+  .. index:: -MM
+
+  Like :option:`-M` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -MF file
+
+  .. index:: -MF
+
+  When used with :option:`-M` or :option:`-MM`, specifies a :samp:`{file}` to write
+  the dependencies to.  When used with the driver options :option:`-MD` or
+  :option:`-MMD`, :option:`-MF` overrides the default dependency output file.
+
+.. option:: -MG
+
+  .. index:: -MG
+
+  This option is for compatibility with :command:`gcc`, and is ignored by the
+  compiler.
+
+.. option:: -MP
+
+  .. index:: -MP
+
+  Outputs a phony target for each dependency other than the modules being
+  compiled, causing each to depend on nothing.
+
+.. option:: -MT target
+
+  .. index:: -MT
+
+  Change the :samp:`{target}` of the rule emitted by dependency generation
+  to be exactly the string you specify.  If you want multiple targets,
+  you can specify them as a single argument to :option:`-MT`, or use
+  multiple :option:`-MT` options.
+
+.. option:: -MQ target
+
+  .. index:: -MQ
+
+  Same as :option:`-MT`, but it quotes any characters which are special to
+  :command:`make`.
+
+.. option:: -MD
+
+  .. index:: -MD
+
+  This option is equivalent to :option:`-M -MF file`.  The driver
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.deps` suffix.
+
+.. option:: -MMD
+
+  .. index:: -MMD
+
+  Like :option:`-MD` but does not mention imported modules from the D standard
+  library package directories.
+
+.. option:: -X
+
+  .. index:: -X
+
+  Output information describing the contents of all source files being
+  compiled in JSON format to a file.  The driver determines :samp:`{file}` by
+  removing any directory components and suffix from the input file, and then
+  adding a :samp:`.json` suffix.
+
+.. option:: -Xf file
+
+  .. index:: -Xf
+
+  Same as :option:`-X`, but writes all JSON contents to the specified
+  :samp:`{file}`.
+
+.. option:: -fdoc
+
+  .. index:: -fdoc
+
+  Generates ``Ddoc`` documentation and writes it to a file.  The compiler
+  determines :samp:`{file}` by removing any directory components and suffix
+  from the input file, and then adding a :samp:`.html` suffix.
+
+.. option:: -fdoc-dir=dir
+
+  .. index:: -fdoc-dir
+
+  Same as :option:`-fdoc`, but writes documentation to directory :samp:`{dir}`.
+  This option can be used with :option:`-fdoc-file=file` to
+  independently set the output file and directory path.
+
+.. option:: -fdoc-file=file
+
+  .. index:: -fdoc-file
+
+  Same as :option:`-fdoc`, but writes documentation to :samp:`{file}`.  This
+  option can be used with :option:`-fdoc-dir=dir` to independently
+  set the output file and directory path.
+
+.. option:: -fdoc-inc=file
+
+  .. index:: -fdoc-inc
+
+  Specify :samp:`{file}` as a :samp:`{Ddoc}` macro file to be read.  Multiple
+  :option:`-fdoc-inc` options can be used, and files are read and processed
+  in the same order.
+
+.. option::  -fdump-c++-spec={file}
+
+  For D source files, generate corresponding C++ declarations in :samp:`{file}`.
+
+.. option:: -fdump-c++-spec-verbose
+
+  In conjunction with :option:`-fdump-c++-spec=` above, add comments for ignored
+  declarations in the generated C++ header.
+
+.. option:: -fsave-mixins={file}
+
+  Generates code expanded from D ``mixin`` statements and writes the
+  processed sources to :samp:`{file}`.  This is useful to debug errors in compilation
+  and provides source for debuggers to show when requested.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/developer-options.rst b/gcc/d/doc/invoking-gdc/developer-options.rst
new file mode 100644
index 00000000000..564ed36d6c0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/developer-options.rst
@@ -0,0 +1,31 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: developer options, debug dump options, dump options
+
+.. _developer-options:
+
+Developer Options
+*****************
+
+This section describes command-line options that are primarily of
+interest to developers or language tooling.
+
+.. option:: -fdump-d-original
+
+  .. index:: -fdump-d-original
+
+  Output the internal front-end AST after the ``semantic3`` stage.
+  This option is only useful for debugging the GNU D compiler itself.
+
+.. option:: -v
+
+  .. index:: -v
+
+  Dump information about the compiler language processing stages as the source
+  program is being compiled.  This includes listing all modules that are
+  processed through the ``parse``, ``semantic``, ``semantic2``, and
+  ``semantic3`` stages; all ``import`` modules and their file paths;
+  and all ``function`` bodies that are being compiled.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/input-and-output-files.rst b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
new file mode 100644
index 00000000000..a4bce6b9aba
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/input-and-output-files.rst
@@ -0,0 +1,45 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: suffixes for D source, D source file suffixes
+
+.. _input-and-output-files:
+
+Input and Output files
+**********************
+
+For any given input file, the file name suffix determines what kind of
+compilation is done.  The following kinds of input file names are supported:
+
+:samp:`{file}.d`
+  D source files.
+
+:samp:`{file}.dd`
+  Ddoc source files.
+
+:samp:`{file}.di`
+  D interface files.
+
+You can specify more than one input file on the :command:`gdc` command line,
+each being compiled separately in the compilation process.  If you specify a
+``-o file`` option, all the input files are compiled together,
+producing a single output file, named :samp:`{file}`.  This is allowed even
+when using ``-S`` or ``-c``.
+
+.. index:: D interface files.
+
+A D interface file contains only what an import of the module needs,
+rather than the whole implementation of that module.  They can be created
+by :command:`gdc` from a D source file by using the ``-H`` option.
+When the compiler resolves an import declaration, it searches for matching
+:samp:`.di` files first, then for :samp:`.d`.
+
+.. index:: Ddoc source files.
+
+A Ddoc source file contains code in the D macro processor language.  It is
+primarily designed for use in producing user documentation from embedded
+comments, with a slight affinity towards HTML generation.  If a :samp:`.d`
+source file starts with the string ``Ddoc`` then it is treated as general
+purpose documentation, not as a D source file.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-directory-search.rst b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
new file mode 100644
index 00000000000..934b22df5b0
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-directory-search.rst
@@ -0,0 +1,92 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: directory options, options, directory search, search path
+
+.. _directory-options:
+
+Options for Directory Search
+****************************
+
+These options specify directories to search for files, libraries, and
+other parts of the compiler:
+
+.. option:: -Idir
+
+  .. index:: -I
+
+  Specify a directory to use when searching for imported modules at
+  compile time.  Multiple :option:`-I` options can be used, and the
+  paths are searched in the same order.
+
+.. option:: -Jdir
+
+  .. index:: -J
+
+  Specify a directory to use when searching for files in string imports
+  at compile time.  This switch is required in order to use
+  ``import(file)`` expressions.  Multiple :option:`-J` options can be
+  used, and the paths are searched in the same order.
+
+.. option:: -Ldir
+
+  .. index:: -L
+
+  When linking, specify a library search directory, as with :command:`gcc`.
+
+.. option:: -Bdir
+
+  .. index:: -B
+
+  This option specifies where to find the executables, libraries,
+  source files, and data files of the compiler itself, as with :command:`gcc`.
+
+.. option:: -fmodule-file=module=spec
+
+  .. index:: -fmodule-file
+
+  This option manipulates file paths of imported modules, such that if an
+  imported module matches all or the leftmost part of :samp:`{module}`, the file
+  path in :samp:`{spec}` is used as the location to search for D sources.
+  This is used when the source file path and names are not the same as the
+  package and module hierarchy.  Consider the following examples:
+
+  .. code-block:: c++
+
+    gdc test.d -fmodule-file=A.B=foo.d -fmodule-file=C=bar
+
+  This will tell the compiler to search in all import paths for the source
+  file :samp:`{foo.d}` when importing :samp:`{A.B}`, and the directory :samp:`{bar/}`
+  when importing :samp:`{C}`, as annotated in the following D code:
+
+  .. code-block:: c++
+
+    module test;
+    import A.B;     // Matches A.B, searches for foo.d
+    import C.D.E;   // Matches C, searches for bar/D/E.d
+    import A.B.C;   // No match, searches for A/B/C.d
+
+.. option:: -imultilib dir
+
+  .. index:: -imultilib
+
+  Use :samp:`{dir}` as a subdirectory of the gcc directory containing
+  target-specific D sources and interfaces.
+
+.. option:: -iprefix prefix
+
+  .. index:: -iprefix
+
+  Specify :samp:`{prefix}` as the prefix for the gcc directory containing
+  target-specific D sources and interfaces.  If the :samp:`{prefix}` represents
+  a directory, you should include the final ``'/'``.
+
+.. option:: -nostdinc
+
+  .. index:: -nostdinc
+
+  Do not search the standard system directories for D source and interface
+  files.  Only the directories that have been specified with :option:`-I` options
+  (and the directory of the current file, if appropriate) are searched.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/options-for-linking.rst b/gcc/d/doc/invoking-gdc/options-for-linking.rst
new file mode 100644
index 00000000000..dc64fcd206a
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/options-for-linking.rst
@@ -0,0 +1,59 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, linking, linking, static
+
+.. _linking:
+
+Options for Linking
+*******************
+
+These options come into play when the compiler links object files into an
+executable output file.  They are meaningless if the compiler is not doing
+a link step.
+
+.. option:: -defaultlib=libname
+
+  .. index:: -defaultlib=
+
+  Specify the library to use instead of libphobos when linking.  Options
+  specifying the linkage of libphobos, such as :option:`-static-libphobos`
+  or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -debuglib=libname
+
+  .. index:: -debuglib=
+
+  Specify the debug library to use instead of libphobos when linking.
+  This option has no effect unless the :option:`-g` option was also given
+  on the command line.  Options specifying the linkage of libphobos, such
+  as :option:`-static-libphobos` or :option:`-shared-libphobos`, are ignored.
+
+.. option:: -nophoboslib
+
+  .. index:: -nophoboslib
+
+  Do not use the Phobos or D runtime library when linking.  Options specifying
+  the linkage of libphobos, such as :option:`-static-libphobos` or
+  :option:`-shared-libphobos`, are ignored.  The standard system libraries are
+  used normally, unless :option:`-nostdlib` or :option:`-nodefaultlibs` is used.
+
+.. option:: -shared-libphobos
+
+  .. index:: -shared-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the shared
+  version.  If no shared version was built when the compiler was configured,
+  this option has no effect.
+
+.. option:: -static-libphobos
+
+  .. index:: -static-libphobos
+
+  On systems that provide :samp:`libgphobos` and :samp:`libgdruntime` as a
+  shared and a static library, this option forces the use of the static
+  version.  If no static version was built when the compiler was configured,
+  this option has no effect.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/runtime-options.rst b/gcc/d/doc/invoking-gdc/runtime-options.rst
new file mode 100644
index 00000000000..fda87c2b96e
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/runtime-options.rst
@@ -0,0 +1,314 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options, runtime
+
+.. _runtime-options:
+
+Runtime Options
+***************
+
+These options affect the runtime behavior of programs compiled with
+:command:`gdc`.
+
+.. option:: -fall-instantiations
+
+  .. index:: -fall-instantiations, -fno-all-instantiations
+
+  Generate code for all template instantiations.  The default template emission
+  strategy is to not generate code for declarations that were either
+  instantiated speculatively, such as from ``__traits(compiles, ...)``, or
+  that come from an imported module not being compiled.
+
+.. option:: -fno-assert
+
+  .. index:: -fassert, -fno-assert
+
+  Turn off code generation for ``assert`` contracts.
+
+.. option:: -fno-bounds-check
+
+  .. index:: -fbounds-check, -fno-bounds-check
+
+  Turns off array bounds checking for all functions, which can improve
+  performance for code that uses arrays extensively.  Note that this
+  can result in unpredictable behavior if the code in question actually
+  does violate array bounds constraints.  It is safe to use this option
+  if you are sure that your code never throws a ``RangeError``.
+
+.. option:: -fbounds-check=value
+
+  .. index:: -fbounds-check=
+
+  An alternative to :option:`-fbounds-check` that allows more control
+  as to where bounds checking is turned on or off.  The following values
+  are supported:
+
+  :samp:`on`
+    Turns on array bounds checking for all functions.
+
+  :samp:`safeonly`
+    Turns on array bounds checking only for ``@safe`` functions.
+
+  :samp:`off`
+    Turns off array bounds checking completely.
+
+.. option:: -fno-builtin
+
+  .. index:: -fbuiltin, -fno-builtin
+
+  Don't recognize built-in functions unless they begin with the prefix
+  :samp:`__builtin_`.  By default, the compiler will recognize when a
+  function in the ``core.stdc`` package is a built-in function.
+
+.. option:: -fcheckaction
+
+  This option controls what code is generated on an assertion, bounds check, or
+  final switch failure.  The following values are supported:
+
+  :samp:`context`
+    Throw an ``AssertError`` with extra context information.
+
+  :samp:`halt`
+    Halt the program execution.
+
+  :samp:`throw`
+    Throw an ``AssertError`` (the default).
+
+.. option:: -fdebug=value
+
+  .. index:: -fno-debug
+
+  Turn on compilation of conditional ``debug`` code into the program.
+  The :option:`-fdebug` option itself sets the debug level to ``1``,
+  while :option:`-fdebug=` enables ``debug`` code that are identified
+  by any of the following values:
+
+  :samp:`level`
+    Sets the debug level to :samp:`{level}`, any ``debug`` code <= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of any ``debug`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-druntime
+
+  .. index:: -fdruntime, -fno-druntime
+
+  Implements https://dlang.org/spec/betterc.html.  Assumes that
+  compilation targets an environment without a D runtime library.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -nophoboslib -fno-exceptions -fno-moduleinfo -fno-rtti
+
+.. option:: -fextern-std=standard
+
+  Sets the C++ name mangling compatibility to the version identified by
+  :samp:`{standard}`.  The following values are supported:
+
+  :samp:`c++98`, :samp:`c++03`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``199711``.
+
+  :samp:`c++11`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201103``.
+
+  :samp:`c++14`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201402``.
+
+  :samp:`c++17`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``201703``.
+    This is the default.
+
+  :samp:`c++20`
+    Sets ``__traits(getTargetInfo, "cppStd")`` to ``202002``.
+
+.. option:: -fno-invariants
+
+  .. index:: -finvariants, -fno-invariants
+
+  Turns off code generation for class ``invariant`` contracts.
+
+.. option:: -fmain
+
+  Generates a default ``main()`` function when compiling.  This is useful when
+  unittesting a library, as it enables running the unittests in a library without
+  having to manually define an entry-point function.  This option does nothing
+  when ``main`` is already defined in user code.
+
+.. option:: -fno-moduleinfo
+
+  Turns off generation of the ``ModuleInfo`` and related functions
+  that would become unreferenced without it, which may allow linking
+  to programs not written in D.  Functions that are not be generated
+  include module constructors and destructors (``static this`` and
+  ``static ~this``), ``unittest`` code, and ``DSO`` registry
+  functions for dynamically linked code.
+
+.. option:: -fonly=filename
+
+  .. index:: -fonly
+
+  Tells the compiler to parse and run semantic analysis on all modules
+  on the command line, but only generate code for the module specified
+  by :samp:`{filename}`.
+
+.. option:: -fno-postconditions
+
+  .. index:: -fpostconditions, -fno-postconditions
+
+  Turns off code generation for postcondition ``out`` contracts.
+
+.. option:: -fno-preconditions
+
+  .. index:: -fpreconditions, -fno-preconditions
+
+  Turns off code generation for precondition ``in`` contracts.
+
+.. option:: -fpreview=id
+
+  .. index:: -fpreview
+
+  Turns on an upcoming D language change identified by :samp:`{id}`.  The following
+  values are supported:
+
+  :samp:`all`
+    Turns on all upcoming D language features.
+
+  :samp:`dip1000`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1000.md
+    (Scoped pointers).
+
+  :samp:`dip1008`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1008.md
+    (Allow exceptions in ``@nogc`` code).
+
+  :samp:`dip1021`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/accepted/DIP1021.md
+    (Mutable function arguments).
+
+  :samp:`dip25`
+    Implements https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns on generation for destructing fields of partially constructed objects.
+
+  :samp:`fieldwise`
+    Turns on generation of struct equality to use field-wise comparisons.
+
+  :samp:`fixaliasthis`
+    Implements new lookup rules that check the current scope for ``alias this``
+    before searching in upper scopes.
+
+  :samp:`fiximmutableconv`
+    Disallows unsound immutable conversions that were formerly incorrectly
+    permitted.
+
+  :samp:`in`
+    Implements ``in`` parameters to mean ``scope const [ref]`` and accepts
+    rvalues.
+
+  :samp:`inclusiveincontracts`
+    Implements ``in`` contracts of overridden methods to be a superset of parent
+    contract.
+
+  :samp:`intpromote`
+    Implements C-style integral promotion for unary ``+``, ``-`` and ``~``
+    expressions.
+
+  :samp:`nosharedaccess`
+    Turns off and disallows all access to shared memory objects.
+
+  :samp:`rvaluerefparam`
+    Implements rvalue arguments to ``ref`` parameters.
+
+  :samp:`systemvariables`
+    Disables access to variables marked ``@system`` from ``@safe`` code.
+
+.. option:: -frelease
+
+  .. index:: -fno-release
+
+  Turns on compiling in release mode, which means not emitting runtime
+  checks for contracts and asserts.  Array bounds checking is not done
+  for ``@system`` and ``@trusted`` functions, and assertion
+  failures are undefined behavior.
+
+  This is equivalent to compiling with the following options:
+
+  .. code-block:: c++
+
+    gdc -fno-assert -fbounds-check=safe -fno-invariants \
+        -fno-postconditions -fno-preconditions -fno-switch-errors
+
+.. option:: -frevert=
+
+  .. index:: -frevert
+
+  Turns off a D language feature identified by :samp:`{id}`.  The following values
+  are supported:
+
+  :samp:`all`
+    Turns off all revertable D language features.
+
+  :samp:`dip25`
+    Reverts https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+    (Sealed references).
+
+  :samp:`dtorfields`
+    Turns off generation for destructing fields of partially constructed objects.
+
+  :samp:`markdown`
+    Turns off Markdown replacements in Ddoc comments.
+
+.. option:: -fno-rtti
+
+  .. index:: -frtti, -fno-rtti
+
+  Turns off generation of run-time type information for all user defined types.
+  Any code that uses features of the language that require access to this
+  information will result in an error.
+
+.. option:: -fno-switch-errors
+
+  .. index:: -fswitch-errors, -fno-switch-errors
+
+  This option controls what code is generated when no case is matched
+  in a ``final switch`` statement.  The default run time behavior
+  is to throw a ``SwitchError``.  Turning off :option:`-fswitch-errors`
+  means that instead the execution of the program is immediately halted.
+
+.. option:: -funittest
+
+  .. index:: -funittest, -fno-unittest
+
+  Turns on compilation of ``unittest`` code, and turns on the
+  ``version(unittest)`` identifier.  This implies :option:`-fassert`.
+
+.. option:: -fversion=value
+
+  .. index:: -fversion
+
+  Turns on compilation of conditional ``version`` code into the program
+  identified by any of the following values:
+
+  :samp:`level`
+    Sets the version level to :samp:`{level}`, any ``version`` code >= :samp:`{level}`
+    is compiled into the program.
+
+  :samp:`ident`
+    Turns on compilation of ``version`` code identified by :samp:`{ident}`.
+
+.. option:: -fno-weak-templates
+
+  .. index:: -fweak-templates, -fno-weak-templates
+
+  Turns off emission of declarations that can be defined in multiple objects as
+  weak symbols.  The default is to emit all public symbols as weak, unless the
+  target lacks support for weak symbols.  Disabling this option means that common
+  symbols are instead put in COMDAT or become private.
\ No newline at end of file
diff --git a/gcc/d/doc/invoking-gdc/warnings.rst b/gcc/d/doc/invoking-gdc/warnings.rst
new file mode 100644
index 00000000000..c9ed52e7630
--- /dev/null
+++ b/gcc/d/doc/invoking-gdc/warnings.rst
@@ -0,0 +1,148 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: options to control warnings, warning messages, messages, warning, suppressing warnings
+
+.. _warnings:
+
+Warnings
+********
+
+Warnings are diagnostic messages that report constructions that
+are not inherently erroneous but that are risky or suggest there
+is likely to be a bug in the program.  Unless :option:`-Werror` is
+specified, they do not prevent compilation of the program.
+
+.. option:: -Wall
+
+  .. index:: -Wall, -Wno-all
+
+  Turns on all warnings messages.  Warnings are not a defined part of
+  the D language, and all constructs for which this may generate a
+  warning message are valid code.
+
+.. option:: -Walloca
+
+  .. index:: -Walloca
+
+  This option warns on all uses of "alloca" in the source.
+
+.. option:: -Walloca-larger-than=n
+
+  .. index:: -Walloca-larger-than, -Wno-alloca-larger-than
+
+  Warn on unbounded uses of alloca, and on bounded uses of alloca
+  whose bound can be larger than :samp:`{n}` bytes.
+  :option:`-Wno-alloca-larger-than` disables
+  :option:`-Walloca-larger-than` warning and is equivalent to
+  :option:`-Walloca-larger-than=SIZE_MAX` or larger.
+
+.. option:: -Wcast-result
+
+  .. index:: -Wcast-result, -Wno-cast-result
+
+  Warn about casts that will produce a null or zero result.  Currently
+  this is only done for casting between an imaginary and non-imaginary
+  data type, or casting between a D and C++ class.
+
+.. option:: -Wno-deprecated
+
+  .. index:: -Wdeprecated, -Wno-deprecated
+
+  Do not warn about usage of deprecated features and symbols with
+  ``deprecated`` attributes.
+
+.. option:: -Werror
+
+  .. index:: -Werror, -Wno-error
+
+  Turns all warnings into errors.
+
+.. option:: -Wspeculative
+
+  .. index:: -Wspeculative, -Wno-speculative
+
+  List all error messages from speculative compiles, such as
+  ``__traits(compiles, ...)``.  This option does not report
+  messages as warnings, and these messages therefore never become
+  errors when the :option:`-Werror` option is also used.
+
+.. option:: -Wtemplates
+
+  .. index:: -Wtemplates, -Wno-templates
+
+  Warn when a template instantiation is encountered.  Some coding
+  rules disallow templates, and this may be used to enforce that rule.
+
+.. option:: -Wunknown-pragmas
+
+  .. index:: -Wunknown-pragmas, -Wno-unknown-pragmas
+
+  Warn when a ``pragma()`` is encountered that is not understood by
+  :command:`gdc`.  This differs from :option:`-fignore-unknown-pragmas`
+  where a pragma that is part of the D language, but not implemented by
+  the compiler, won't get reported.
+
+.. option:: -Wno-varargs
+
+  .. index:: Wvarargs, Wno-varargs
+
+  Do not warn upon questionable usage of the macros used to handle variable
+  arguments like ``va_start``.
+
+.. option:: -fignore-unknown-pragmas
+
+  .. index:: -fignore-unknown-pragmas, -fno-ignore-unknown-pragmas
+
+  Turns off errors for unsupported pragmas.
+
+.. option:: -fmax-errors=n
+
+  .. index:: -fmax-errors
+
+  Limits the maximum number of error messages to :samp:`{n}`, at which point
+  :command:`gdc` bails out rather than attempting to continue processing the
+  source code.  If :samp:`{n}` is 0 (the default), there is no limit on the
+  number of error messages produced.
+
+.. option:: -fsyntax-only
+
+  .. index:: -fsyntax-only, -fno-syntax-only
+
+  Check the code for syntax errors, but do not actually compile it.  This
+  can be used in conjunction with :option:`-fdoc` or :option:`-H` to generate
+  files for each module present on the command-line, but no other output
+  file.
+
+.. option:: -ftransition=id
+
+  .. index:: -ftransition
+
+  Report additional information about D language changes identified by
+  :samp:`{id}`.  The following values are supported:
+
+  :samp:`all`
+    List information on all D language transitions.
+
+  :samp:`complex`
+    List all usages of complex or imaginary types.
+
+  :samp:`field`
+    List all non-mutable fields which occupy an object instance.
+
+  :samp:`in`
+    List all usages of ``in`` on parameter.
+
+  :samp:`nogc`
+    List all hidden GC allocations.
+
+  :samp:`templates`
+    List statistics on template instantiations.
+
+  :samp:`tls`
+    List all variables going into thread local storage.
+
+  :samp:`vmarkdown`
+    List instances of Markdown replacements in Ddoc.
\ No newline at end of file
diff --git a/gcc/doc/cpp/character-sets.rst b/gcc/doc/cpp/character-sets.rst
new file mode 100644
index 00000000000..f4b6e05515c
--- /dev/null
+++ b/gcc/doc/cpp/character-sets.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _character-sets:
+
+Character sets
+**************
+
+Source code character set processing in C and related languages is
+rather complicated.  The C standard discusses two character sets, but
+there are really at least four.
+
+The files input to CPP might be in any character set at all.  CPP's
+very first action, before it even looks for line boundaries, is to
+convert the file into the character set it uses for internal
+processing.  That set is what the C standard calls the :dfn:`source`
+character set.  It must be isomorphic with ISO 10646, also known as
+Unicode.  CPP uses the UTF-8 encoding of Unicode.
+
+The character sets of the input files are specified using the
+:option:`-finput-charset=` option.
+
+All preprocessing work (the subject of the rest of this manual) is
+carried out in the source character set.  If you request textual
+output from the preprocessor with the :option:`-E` option, it will be
+in UTF-8.
+
+After preprocessing is complete, string and character constants are
+converted again, into the :dfn:`execution` character set.  This
+character set is under control of the user; the default is UTF-8,
+matching the source character set.  Wide string and character
+constants have their own character set, which is not called out
+specifically in the standard.  Again, it is under control of the user.
+The default is UTF-16 or UTF-32, whichever fits in the target's
+``wchar_t`` type, in the target machine's byte
+order [#f1]_.
+
+Octal and hexadecimal escape sequences do not undergo
+conversion; ``'\x12'`` has the value 0x12 regardless of the currently
+selected execution character set.  All other escapes are replaced by
+the character in the source character set that they represent, then
+converted to the execution character set, just like unescaped
+characters.
+
+In identifiers, characters outside the ASCII range can be specified
+with the :samp:`\\u` and :samp:`\\U` escapes or used directly in the input
+encoding.  If strict ISO C90 conformance is specified with an option
+such as :option:`-std=c90`, or :option:`-fno-extended-identifiers` is
+used, then those constructs are not permitted in identifiers.
+
+.. [#f1] UTF-16 does not meet the requirements of the C
+  standard for a wide character set, but the choice of 16-bit
+  ``wchar_t`` is enshrined in some system ABIs so we cannot fix
+  this.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-syntax.rst b/gcc/doc/cpp/conditional-syntax.rst
new file mode 100644
index 00000000000..1dec2ac6f4b
--- /dev/null
+++ b/gcc/doc/cpp/conditional-syntax.rst
@@ -0,0 +1,411 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #if
+
+.. _conditional-syntax:
+
+Conditional Syntax
+******************
+
+A conditional in the C preprocessor begins with a :dfn:`conditional
+directive`: :samp:`#if`, :samp:`#ifdef` or :samp:`#ifndef`.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: #ifdef, #endif
+
+.. _ifdef:
+
+Ifdef
+^^^^^
+
+The simplest sort of conditional is
+
+.. code-block:: c++
+
+  #ifdef MACRO
+
+  controlled text
+
+  #endif /* MACRO */
+
+.. index:: conditional group
+
+This block is called a :dfn:`conditional group`.  :samp:`{controlled text}`
+will be included in the output of the preprocessor if and only if
+:samp:`{MACRO}` is defined.  We say that the conditional :dfn:`succeeds` if
+:samp:`{MACRO}` is defined, :dfn:`fails` if it is not.
+
+The :samp:`{controlled text}` inside of a conditional can include
+preprocessing directives.  They are executed only if the conditional
+succeeds.  You can nest conditional groups inside other conditional
+groups, but they must be completely nested.  In other words,
+:samp:`#endif` always matches the nearest :samp:`#ifdef` (or
+:samp:`#ifndef`, or :samp:`#if`).  Also, you cannot start a conditional
+group in one file and end it in another.
+
+Even if a conditional fails, the :samp:`{controlled text}` inside it is
+still run through initial transformations and tokenization.  Therefore,
+it must all be lexically valid C.  Normally the only way this matters is
+that all comments and string literals inside a failing conditional group
+must still be properly ended.
+
+The comment following the :samp:`#endif` is not required, but it is a
+good practice if there is a lot of :samp:`{controlled text}`, because it
+helps people match the :samp:`#endif` to the corresponding :samp:`#ifdef`.
+Older programs sometimes put :samp:`{MACRO}` directly after the
+:samp:`#endif` without enclosing it in a comment.  This is invalid code
+according to the C standard.  CPP accepts it with a warning.  It
+never affects which :samp:`#ifndef` the :samp:`#endif` matches.
+
+.. index:: #ifndef
+
+Sometimes you wish to use some code if a macro is *not* defined.
+You can do this by writing :samp:`#ifndef` instead of :samp:`#ifdef`.
+One common use of :samp:`#ifndef` is to include code only the first
+time a header file is included.  See :ref:`once-only-headers`.
+
+Macro definitions can vary between compilations for several reasons.
+Here are some samples.
+
+* Some macros are predefined on each kind of machine
+  (see :ref:`system-specific-predefined-macros`).  This allows you to provide
+  code specially tuned for a particular machine.
+
+* System header files define more macros, associated with the features
+  they implement.  You can test these macros with conditionals to avoid
+  using a system feature on a machine where it is not implemented.
+
+* Macros can be defined or undefined with the :option:`-D` and :option:`-U`
+  command-line options when you compile the program.  You can arrange to
+  compile the same source file into two different programs by choosing a
+  macro name to specify which program you want, writing conditionals to
+  test whether or how this macro is defined, and then controlling the
+  state of the macro with command-line options, perhaps set in the
+  Makefile.  See :ref:`invocation`.
+
+* Your program might have a special header file (often called
+  :samp:`config.h`) that is adjusted when the program is compiled.  It can
+  define or not define macros depending on the features of the system and
+  the desired capabilities of the program.  The adjustment can be
+  automated by a tool such as :command:`autoconf`, or done by hand.
+
+.. _if:
+
+If
+^^
+
+The :samp:`#if` directive allows you to test the value of an arithmetic
+expression, rather than the mere existence of one macro.  Its syntax is
+
+.. code-block:: c++
+
+  #if expression
+
+  controlled text
+
+  #endif /* expression */
+
+:samp:`{expression}` is a C expression of integer type, subject to stringent
+restrictions.  It may contain
+
+* Integer constants.
+
+* Character constants, which are interpreted as they would be in normal
+  code.
+
+* Arithmetic operators for addition, subtraction, multiplication,
+  division, bitwise operations, shifts, comparisons, and logical
+  operations (``&&`` and ``||``).  The latter two obey the usual
+  short-circuiting rules of standard C.
+
+* Macros.  All macros in the expression are expanded before actual
+  computation of the expression's value begins.
+
+* Uses of the ``defined`` operator, which lets you check whether macros
+  are defined in the middle of an :samp:`#if`.
+
+* Identifiers that are not macros, which are all considered to be the
+  number zero.  This allows you to write ``#if MACRO`` instead of
+  ``#ifdef MACRO``, if you know that MACRO, when defined, will
+  always have a nonzero value.  Function-like macros used without their
+  function call parentheses are also treated as zero.
+
+  In some contexts this shortcut is undesirable.  The :option:`-Wundef`
+  option causes GCC to warn whenever it encounters an identifier which is
+  not a macro in an :samp:`#if`.
+
+The preprocessor does not know anything about types in the language.
+Therefore, ``sizeof`` operators are not recognized in :samp:`#if`, and
+neither are ``enum`` constants.  They will be taken as identifiers
+which are not macros, and replaced by zero.  In the case of
+``sizeof``, this is likely to cause the expression to be invalid.
+
+The preprocessor calculates the value of :samp:`{expression}`.  It carries
+out all calculations in the widest integer type known to the compiler;
+on most machines supported by GCC this is 64 bits.  This is not the same
+rule as the compiler uses to calculate the value of a constant
+expression, and may give different results in some cases.  If the value
+comes out to be nonzero, the :samp:`#if` succeeds and the :samp:`{controlled
+text}` is included; otherwise it is skipped.
+
+.. index:: defined
+
+.. _defined:
+
+Defined
+^^^^^^^
+
+The special operator ``defined`` is used in :samp:`#if` and
+:samp:`#elif` expressions to test whether a certain name is defined as a
+macro.  ``defined name`` and ``defined (name)`` are
+both expressions whose value is 1 if :samp:`{name}` is defined as a macro at
+the current point in the program, and 0 otherwise.  Thus,  ``#if
+defined MACRO`` is precisely equivalent to ``#ifdef MACRO``.
+
+``defined`` is useful when you wish to test more than one macro for
+existence at once.  For example,
+
+.. code-block:: c++
+
+  #if defined (__vax__) || defined (__ns16000__)
+
+would succeed if either of the names ``__vax__`` or
+``__ns16000__`` is defined as a macro.
+
+Conditionals written like this:
+
+.. code-block:: c++
+
+  #if defined BUFSIZE && BUFSIZE >= 1024
+
+can generally be simplified to just ``#if BUFSIZE >= 1024``,
+since if ``BUFSIZE`` is not defined, it will be interpreted as having
+the value zero.
+
+If the ``defined`` operator appears as a result of a macro expansion,
+the C standard says the behavior is undefined.  GNU cpp treats it as a
+genuine ``defined`` operator and evaluates it normally.  It will warn
+wherever your code uses this feature if you use the command-line option
+:option:`-Wpedantic`, since other compilers may handle it differently.  The
+warning is also enabled by :option:`-Wextra`, and can also be enabled
+individually with :option:`-Wexpansion-to-defined`.
+
+.. index:: #else
+
+.. _else:
+
+Else
+^^^^
+
+The :samp:`#else` directive can be added to a conditional to provide
+alternative text to be used if the condition fails.  This is what it
+looks like:
+
+.. code-block:: c++
+
+  #if expression
+  text-if-true
+  #else /* Not expression */
+  text-if-false
+  #endif /* Not expression */
+
+If :samp:`{expression}` is nonzero, the :samp:`{text-if-true}` is included and
+the :samp:`{text-if-false}` is skipped.  If :samp:`{expression}` is zero, the
+opposite happens.
+
+You can use :samp:`#else` with :samp:`#ifdef` and :samp:`#ifndef`, too.
+
+.. index:: #elif
+
+.. _elif:
+
+Elif
+^^^^
+
+One common case of nested conditionals is used to check for more than two
+possible alternatives.  For example, you might have
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #else /* X != 1 */
+  #if X == 2
+  ...
+  #else /* X != 2 */
+  ...
+  #endif /* X != 2 */
+  #endif /* X != 1 */
+
+Another conditional directive, :samp:`#elif`, allows this to be
+abbreviated as follows:
+
+.. code-block:: c++
+
+  #if X == 1
+  ...
+  #elif X == 2
+  ...
+  #else /* X != 2 and X != 1*/
+  ...
+  #endif /* X != 2 and X != 1*/
+
+:samp:`#elif` stands for 'else if'.  Like :samp:`#else`, it goes in the
+middle of a conditional group and subdivides it; it does not require a
+matching :samp:`#endif` of its own.  Like :samp:`#if`, the :samp:`#elif`
+directive includes an expression to be tested.  The text following the
+:samp:`#elif` is processed only if the original :samp:`#if`-condition
+failed and the :samp:`#elif` condition succeeds.
+
+More than one :samp:`#elif` can go in the same conditional group.  Then
+the text after each :samp:`#elif` is processed only if the :samp:`#elif`
+condition succeeds after the original :samp:`#if` and all previous
+:samp:`#elif` directives within it have failed.
+
+:samp:`#else` is allowed after any number of :samp:`#elif` directives, but
+:samp:`#elif` may not follow :samp:`#else`.
+
+.. index:: __has_attribute
+
+__has_attribute
+^^^^^^^^^^^^^^^
+
+The special operator ``__has_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions to test whether the attribute
+referenced by its :samp:`{operand}` is recognized by GCC.  Using the operator
+in other contexts is not valid.  In C code, if compiling for strict
+conformance to standards before C2x, :samp:`{operand}` must be
+a valid identifier.  Otherwise, :samp:`{operand}` may be optionally
+introduced by the ``attribute-scope::`` prefix.
+The :samp:`{attribute-scope}` prefix identifies the 'namespace' within
+which the attribute is recognized.  The scope of GCC attributes is
+:samp:`gnu` or :samp:`__gnu__`.  The ``__has_attribute`` operator by
+itself, without any :samp:`{operand}` or parentheses, acts as a predefined
+macro so that support for it can be tested in portable code.  Thus,
+the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_attribute
+  #  if __has_attribute (nonnull)
+  #    define ATTR_NONNULL __attribute__ ((nonnull))
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_attribute`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression as
+shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_attribute && __has_attribute (nonnull)   /* not portable */
+  ...
+  #endif
+
+.. index:: __has_cpp_attribute
+
+__has_cpp_attribute
+^^^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_cpp_attribute (operand)`` may be used
+in :samp:`#if` and :samp:`#elif` expressions in C++ code to test whether
+the attribute referenced by its :samp:`{operand}` is recognized by GCC.
+``__has_cpp_attribute (operand)`` is equivalent to
+``__has_attribute (operand)`` except that when :samp:`{operand}`
+designates a supported standard attribute it evaluates to an integer
+constant of the form ``YYYYMM`` indicating the year and month when
+the attribute was first introduced into the C++ standard.  For additional
+information including the dates of the introduction of current standard
+attributes, see `SD-6: SG10 Feature Test Recommendations <https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations/>`_.
+
+.. index:: __has_c_attribute
+
+__has_c_attribute
+^^^^^^^^^^^^^^^^^
+
+The special operator ``__has_c_attribute (operand)`` may be
+used in :samp:`#if` and :samp:`#elif` expressions in C code to test
+whether the attribute referenced by its :samp:`{operand}` is recognized by
+GCC in attributes using the :samp:`[[]]` syntax.  GNU attributes must
+be specified with the scope :samp:`gnu` or :samp:`__gnu__` with
+``__has_c_attribute``.  When :samp:`{operand}` designates a supported
+standard attribute it evaluates to an integer constant of the form
+``YYYYMM`` indicating the year and month when the attribute was
+first introduced into the C standard, or when the syntax of operands
+to the attribute was extended in the C standard.
+
+.. index:: __has_builtin
+
+__has_builtin
+^^^^^^^^^^^^^
+
+The special operator ``__has_builtin (operand)`` may be used in
+constant integer contexts and in preprocessor :samp:`#if` and :samp:`#elif`
+expressions to test whether the symbol named by its :samp:`{operand}` is
+recognized as a built-in function by GCC in the current language and
+conformance mode.  It evaluates to a constant integer with a nonzero
+value if the argument refers to such a function, and to zero otherwise.
+The operator may also be used in preprocessor :samp:`#if` and :samp:`#elif`
+expressions.  The ``__has_builtin`` operator by itself, without any
+:samp:`{operand}` or parentheses, acts as a predefined macro so that support
+for it can be tested in portable code.  Thus, the recommended use of
+the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_builtin
+  #  if __has_builtin (__builtin_object_size)
+  #    define builtin_object_size(ptr) __builtin_object_size (ptr, 2)
+  #  endif
+  #endif
+  #ifndef builtin_object_size
+  #  define builtin_object_size(ptr)   ((size_t)-1)
+  #endif
+
+.. index:: __has_include
+
+__has_include
+^^^^^^^^^^^^^
+
+The special operator ``__has_include (operand)`` may be used in
+:samp:`#if` and :samp:`#elif` expressions to test whether the header referenced
+by its :samp:`{operand}` can be included using the :samp:`#include` directive.  Using
+the operator in other contexts is not valid.  The :samp:`{operand}` takes
+the same form as the file in the :samp:`#include` directive (see :ref:`include-syntax`) and evaluates to a nonzero value if the header can be included and
+to zero otherwise.  Note that that the ability to include a header doesn't
+imply that the header doesn't contain invalid constructs or :samp:`#error`
+directives that would cause the preprocessor to fail.
+
+The ``__has_include`` operator by itself, without any :samp:`{operand}` or
+parentheses, acts as a predefined macro so that support for it can be tested
+in portable code.  Thus, the recommended use of the operator is as follows:
+
+.. code-block:: c++
+
+  #if defined __has_include
+  #  if __has_include (<stdatomic.h>)
+  #    include <stdatomic.h>
+  #  endif
+  #endif
+
+The first :samp:`#if` test succeeds only when the operator is supported
+by the version of GCC (or another compiler) being used.  Only when that
+test succeeds is it valid to use ``__has_include`` as a preprocessor
+operator.  As a result, combining the two tests into a single expression
+as shown below would only be valid with a compiler that supports the operator
+but not with others that don't.
+
+.. code-block:: c++
+
+  #if defined __has_include && __has_include ("header.h")   /* not portable */
+  ...
+  #endif
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditional-uses.rst b/gcc/doc/cpp/conditional-uses.rst
new file mode 100644
index 00000000000..59555a5828d
--- /dev/null
+++ b/gcc/doc/cpp/conditional-uses.rst
@@ -0,0 +1,32 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _conditional-uses:
+
+Conditional Uses
+****************
+
+There are three general reasons to use a conditional.
+
+* A program may need to use different code depending on the machine or
+  operating system it is to run on.  In some cases the code for one
+  operating system may be erroneous on another operating system; for
+  example, it might refer to data types or constants that do not exist on
+  the other system.  When this happens, it is not enough to avoid
+  executing the invalid code.  Its mere presence will cause the compiler
+  to reject the program.  With a preprocessing conditional, the offending
+  code can be effectively excised from the program when it is not valid.
+
+* You may want to be able to compile the same source file into two
+  different programs.  One version might make frequent time-consuming
+  consistency checks on its intermediate data, or print the values of
+  those data for debugging, and the other not.
+
+* A conditional whose condition is always false is one way to exclude code
+  from the program but keep it as a sort of comment for future reference.
+
+Simple programs that do not need system-specific logic or complex
+debugging hooks generally will not need to use preprocessing
+conditionals.
\ No newline at end of file
diff --git a/gcc/doc/cpp/conditionals.rst b/gcc/doc/cpp/conditionals.rst
new file mode 100644
index 00000000000..381a6124da4
--- /dev/null
+++ b/gcc/doc/cpp/conditionals.rst
@@ -0,0 +1,44 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: conditionals
+
+.. _conditionals:
+
+Conditionals
+------------
+
+A :dfn:`conditional` is a directive that instructs the preprocessor to
+select whether or not to include a chunk of code in the final token
+stream passed to the compiler.  Preprocessor conditionals can test
+arithmetic expressions, or whether a name is defined as a macro, or both
+simultaneously using the special ``defined`` operator.
+
+A conditional in the C preprocessor resembles in some ways an ``if``
+statement in C, but it is important to understand the difference between
+them.  The condition in an ``if`` statement is tested during the
+execution of your program.  Its purpose is to allow your program to
+behave differently from run to run, depending on the data it is
+operating on.  The condition in a preprocessing conditional directive is
+tested when your program is compiled.  Its purpose is to allow different
+code to be included in the program depending on the situation at the
+time of compilation.
+
+However, the distinction is becoming less clear.  Modern compilers often
+do test ``if`` statements when a program is compiled, if their
+conditions are known not to vary at run time, and eliminate code which
+can never be executed.  If you can count on your compiler to do this,
+you may find that your program is more readable if you use ``if``
+statements with constant conditions (perhaps determined by macros).  Of
+course, you can only use this to exclude code, not type definitions or
+other preprocessing directives, and you can only do it if the code
+remains syntactically valid when it is not to be used.
+
+.. toctree::
+  :maxdepth: 2
+
+  conditional-uses
+  conditional-syntax
+  deleted-code
\ No newline at end of file
diff --git a/gcc/doc/cpp/conf.py b/gcc/doc/cpp/conf.py
new file mode 100644
index 00000000000..29d3aed4558
--- /dev/null
+++ b/gcc/doc/cpp/conf.py
@@ -0,0 +1,30 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../../..//doc')
+
+from baseconf import *
+
+name = 'cpp'
+project = 'The C Preprocessor'
+copyright = '1987-2022 Free Software Foundation, Inc.'
+authors = 'Richard M. Stallman, Zachary Weinberg'
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('invocation', name, project, [authors], 1),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+set_common(name, globals())
\ No newline at end of file
diff --git a/gcc/doc/cpp/copyright.rst b/gcc/doc/cpp/copyright.rst
new file mode 100644
index 00000000000..fa61190ddf7
--- /dev/null
+++ b/gcc/doc/cpp/copyright.rst
@@ -0,0 +1,24 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the GPL license file
+
+Copyright
+^^^^^^^^^
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, the Front-Cover Texts being (a) (see below), and
+with the Back-Cover Texts being (b) (see below).
+A copy of the license is included in the :ref:`gnu_fdl`.
+
+(a) The FSF's Front-Cover Text is:
+
+     A GNU Manual
+
+(b) The FSF's Back-Cover Text is:
+
+     You have freedom to copy and modify this GNU Manual, like GNU
+     software.  Copies published by the Free Software Foundation raise
+     funds for GNU development.
\ No newline at end of file
diff --git a/gcc/doc/cpp/deleted-code.rst b/gcc/doc/cpp/deleted-code.rst
new file mode 100644
index 00000000000..758e0c1c0a3
--- /dev/null
+++ b/gcc/doc/cpp/deleted-code.rst
@@ -0,0 +1,34 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: commenting out code
+
+.. _deleted-code:
+
+Deleted Code
+************
+
+If you replace or delete a part of the program but want to keep the old
+code around for future reference, you often cannot simply comment it
+out.  Block comments do not nest, so the first comment inside the old
+code will end the commenting-out.  The probable result is a flood of
+syntax errors.
+
+One way to avoid this problem is to use an always-false conditional
+instead.  For instance, put ``#if 0`` before the deleted code and
+``#endif`` after it.  This works even if the code being turned
+off contains conditionals, but they must be entire conditionals
+(balanced :samp:`#if` and :samp:`#endif`).
+
+Some people use ``#ifdef notdef`` instead.  This is risky, because
+``notdef`` might be accidentally defined as a macro, and then the
+conditional would succeed.  ``#if 0`` can be counted on to fail.
+
+Do not use ``#if 0`` for comments which are not C code.  Use a real
+comment, instead.  The interior of ``#if 0`` must consist of complete
+tokens; in particular, single-quote characters must balance.  Comments
+often contain unbalanced single-quote characters (known in English as
+apostrophes).  These confuse ``#if 0``.  They don't confuse
+:samp:`/*`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/diagnostics.rst b/gcc/doc/cpp/diagnostics.rst
new file mode 100644
index 00000000000..beaad7d8217
--- /dev/null
+++ b/gcc/doc/cpp/diagnostics.rst
@@ -0,0 +1,51 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: diagnostic, reporting errors, reporting warnings, #error
+
+.. _diagnostics:
+
+Diagnostics
+-----------
+
+The directive :samp:`#error` causes the preprocessor to report a fatal
+error.  The tokens forming the rest of the line following :samp:`#error`
+are used as the error message.
+
+You would use :samp:`#error` inside of a conditional that detects a
+combination of parameters which you know the program does not properly
+support.  For example, if you know that the program will not run
+properly on a VAX, you might write
+
+.. code-block:: c++
+
+  #ifdef __vax__
+  #error "Won't work on VAXen.  See comments at get_last_object."
+  #endif
+
+If you have several configuration parameters that must be set up by
+the installation in a consistent way, you can use conditionals to detect
+an inconsistency and report it with :samp:`#error`.  For example,
+
+.. code-block:: c++
+
+  #if !defined(FOO) && defined(BAR)
+  #error "BAR requires FOO."
+  #endif
+
+.. index:: #warning
+
+The directive :samp:`#warning` is like :samp:`#error`, but causes the
+preprocessor to issue a warning and continue preprocessing.  The tokens
+following :samp:`#warning` are used as the warning message.
+
+You might use :samp:`#warning` in obsolete header files, with a message
+directing the user to the header file which should be used instead.
+
+Neither :samp:`#error` nor :samp:`#warning` macro-expands its argument.
+Internal whitespace sequences are each replaced with a single space.
+The line must consist of complete tokens.  It is wisest to make the
+argument of these directives be a single string constant; this avoids
+problems with apostrophes and the like.
\ No newline at end of file
diff --git a/gcc/doc/cpp/environment-variables.rst b/gcc/doc/cpp/environment-variables.rst
new file mode 100644
index 00000000000..c0ab7992905
--- /dev/null
+++ b/gcc/doc/cpp/environment-variables.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: environment variables
+
+.. _environment-variables:
+
+Environment Variables
+---------------------
+
+This section describes the environment variables that affect how CPP
+operates.  You can use them to specify directories or prefixes to use
+when searching for include files, or to control dependency output.
+
+Note that you can also specify places to search using options such as
+:option:`-I`, and control dependency output with options like
+:option:`-M` (see :ref:`invocation`).  These take precedence over
+environment variables, which in turn take precedence over the
+configuration of GCC.
+
+.. include:: ../../../doc/cppenv.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/gnu-free-documentation-license.rst b/gcc/doc/cpp/gnu-free-documentation-license.rst
new file mode 100644
index 00000000000..1de809b3636
--- /dev/null
+++ b/gcc/doc/cpp/gnu-free-documentation-license.rst
@@ -0,0 +1,6 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. include:: ../../../doc/gnu_free_documentation_license.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files.rst b/gcc/doc/cpp/header-files.rst
new file mode 100644
index 00000000000..13b9841c3c6
--- /dev/null
+++ b/gcc/doc/cpp/header-files.rst
@@ -0,0 +1,56 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: header file
+
+.. _header-files:
+
+Header Files
+------------
+
+A header file is a file containing C declarations and macro definitions
+(see :ref:`macros`) to be shared between several source files.  You request
+the use of a header file in your program by :dfn:`including` it, with the
+C preprocessing directive :samp:`#include`.
+
+Header files serve two purposes.
+
+.. index:: system header files
+
+* System header files declare the interfaces to parts of the operating
+  system.  You include them in your program to supply the definitions and
+  declarations you need to invoke system calls and libraries.
+
+* Your own header files contain declarations for interfaces between the
+  source files of your program.  Each time you have a group of related
+  declarations and macro definitions all or most of which are needed in
+  several different source files, it is a good idea to create a header
+  file for them.
+
+Including a header file produces the same results as copying the header
+file into each source file that needs it.  Such copying would be
+time-consuming and error-prone.  With a header file, the related
+declarations appear in only one place.  If they need to be changed, they
+can be changed in one place, and programs that include the header file
+will automatically use the new version when next recompiled.  The header
+file eliminates the labor of finding and changing all the copies as well
+as the risk that a failure to find one copy will result in
+inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with
+:samp:`.h`.  It is most portable to use only letters, digits, dashes, and
+underscores in header file names, and at most one dot.
+
+.. toctree::
+  :maxdepth: 2
+
+  header-files/include-syntax
+  header-files/include-operation
+  header-files/search-path
+  header-files/once-only-headers
+  header-files/alternatives-to-wrapper-ifndef
+  header-files/computed-includes
+  header-files/wrapper-headers
+  header-files/system-headers
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
new file mode 100644
index 00000000000..e38cffeaf38
--- /dev/null
+++ b/gcc/doc/cpp/header-files/alternatives-to-wrapper-ifndef.rst
@@ -0,0 +1,40 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _alternatives-to-wrapper-ifndef:
+
+Alternatives to Wrapper #ifndef
+*******************************
+
+CPP supports two more ways of indicating that a header file should be
+read only once.  Neither one is as portable as a wrapper :samp:`#ifndef`
+and we recommend you do not use them in new programs, with the caveat
+that :samp:`#import` is standard practice in Objective-C.
+
+.. index:: #import
+
+CPP supports a variant of :samp:`#include` called :samp:`#import` which
+includes a file, but does so at most once.  If you use :samp:`#import`
+instead of :samp:`#include`, then you don't need the conditionals
+inside the header file to prevent multiple inclusion of the contents.
+:samp:`#import` is standard in Objective-C, but is considered a
+deprecated extension in C and C++.
+
+:samp:`#import` is not a well designed feature.  It requires the users of
+a header file to know that it should only be included once.  It is much
+better for the header file's implementor to write the file so that users
+don't need to know this.  Using a wrapper :samp:`#ifndef` accomplishes
+this goal.
+
+In the present implementation, a single use of :samp:`#import` will
+prevent the file from ever being read again, by either :samp:`#import` or
+:samp:`#include`.  You should not rely on this; do not use both
+:samp:`#import` and :samp:`#include` to refer to the same header file.
+
+Another way to prevent a header file from being included more than once
+is with the :samp:`#pragma once` directive (see :ref:`pragmas`).
+:samp:`#pragma once` does not have the problems that :samp:`#import` does,
+but it is not recognized by all preprocessors, so you cannot rely on it
+in a portable program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/computed-includes.rst b/gcc/doc/cpp/header-files/computed-includes.rst
new file mode 100644
index 00000000000..49c16228032
--- /dev/null
+++ b/gcc/doc/cpp/header-files/computed-includes.rst
@@ -0,0 +1,86 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: computed includes, macros in include
+
+.. _computed-includes:
+
+Computed Includes
+*****************
+
+Sometimes it is necessary to select one of several different header
+files to be included into your program.  They might specify
+configuration parameters to be used on different sorts of operating
+systems, for instance.  You could do this with a series of conditionals,
+
+.. code-block:: c++
+
+  #if SYSTEM_1
+  # include "system_1.h"
+  #elif SYSTEM_2
+  # include "system_2.h"
+  #elif SYSTEM_3
+  ...
+  #endif
+
+That rapidly becomes tedious.  Instead, the preprocessor offers the
+ability to use a macro for the header name.  This is called a
+:dfn:`computed include`.  Instead of writing a header name as the direct
+argument of :samp:`#include`, you simply put a macro name there instead:
+
+.. code-block:: c++
+
+  #define SYSTEM_H "system_1.h"
+  ...
+  #include SYSTEM_H
+
+``SYSTEM_H`` will be expanded, and the preprocessor will look for
+:samp:`system_1.h` as if the :samp:`#include` had been written that way
+originally.  ``SYSTEM_H`` could be defined by your Makefile with a
+:option:`-D` option.
+
+You must be careful when you define the macro.  :samp:`#define` saves
+tokens, not text.  The preprocessor has no way of knowing that the macro
+will be used as the argument of :samp:`#include`, so it generates
+ordinary tokens, not a header name.  This is unlikely to cause problems
+if you use double-quote includes, which are close enough to string
+constants.  If you use angle brackets, however, you may have trouble.
+
+The syntax of a computed include is actually a bit more general than the
+above.  If the first non-whitespace character after :samp:`#include` is
+not :samp:`"` or :samp:`<`, then the entire line is macro-expanded
+like running text would be.
+
+If the line expands to a single string constant, the contents of that
+string constant are the file to be included.  CPP does not re-examine the
+string for embedded quotes, but neither does it process backslash
+escapes in the string.  Therefore
+
+.. code-block:: c++
+
+  #define HEADER "a\"b"
+  #include HEADER
+
+looks for a file named :samp:`a\\"b`.  CPP searches for the file according
+to the rules for double-quoted includes.
+
+If the line expands to a token stream beginning with a :samp:`<` token
+and including a :samp:`>` token, then the tokens between the :samp:`<` and
+the first :samp:`>` are combined to form the filename to be included.
+Any whitespace between tokens is reduced to a single space; then any
+space after the initial :samp:`<` is retained, but a trailing space
+before the closing :samp:`>` is ignored.  CPP searches for the file
+according to the rules for angle-bracket includes.
+
+In either case, if there are any tokens on the line after the file name,
+an error occurs and the directive is not processed.  It is also an error
+if the result of expansion does not match either of the two expected
+forms.
+
+These rules are implementation-defined behavior according to the C
+standard.  To minimize the risk of different compilers interpreting your
+computed includes differently, we recommend you use only a single
+object-like macro which expands to a string constant.  This will also
+minimize confusion for people reading your program.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-operation.rst b/gcc/doc/cpp/header-files/include-operation.rst
new file mode 100644
index 00000000000..465905698e7
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-operation.rst
@@ -0,0 +1,67 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _include-operation:
+
+Include Operation
+*****************
+
+The :samp:`#include` directive works by directing the C preprocessor to
+scan the specified file as input before continuing with the rest of the
+current file.  The output from the preprocessor contains the output
+already generated, followed by the output resulting from the included
+file, followed by the output that comes from the text after the
+:samp:`#include` directive.  For example, if you have a header file
+:samp:`header.h` as follows,
+
+.. code-block:: c++
+
+  char *test (void);
+
+and a main program called :samp:`program.c` that uses the header file,
+like this,
+
+.. code-block:: c++
+
+  int x;
+  #include "header.h"
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+the compiler will see the same token stream as it would if
+:samp:`program.c` read
+
+.. code-block:: c++
+
+  int x;
+  char *test (void);
+
+  int
+  main (void)
+  {
+    puts (test ());
+  }
+
+Included files are not limited to declarations and macro definitions;
+those are merely the typical uses.  Any fragment of a C program can be
+included from another file.  The include file could even contain the
+beginning of a statement that is concluded in the containing file, or
+the end of a statement that was started in the including file.  However,
+an included file must consist of complete tokens.  Comments and string
+literals which have not been closed by the end of an included file are
+invalid.  For error recovery, they are considered to end at the end of
+the file.
+
+To avoid confusion, it is best if header files contain only complete
+syntactic units---function declarations or definitions, type
+declarations, etc.
+
+The line following the :samp:`#include` directive is always treated as a
+separate line by the C preprocessor, even if the included file lacks a
+final newline.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/include-syntax.rst b/gcc/doc/cpp/header-files/include-syntax.rst
new file mode 100644
index 00000000000..a378dfc5375
--- /dev/null
+++ b/gcc/doc/cpp/header-files/include-syntax.rst
@@ -0,0 +1,42 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: #include
+
+.. _include-syntax:
+
+Include Syntax
+**************
+
+Both user and system header files are included using the preprocessing
+directive :samp:`#include`.  It has two variants:
+
+:samp:`#include <{file}>`
+  This variant is used for system header files.  It searches for a file
+  named :samp:`{file}` in a standard list of system directories.  You can prepend
+  directories to this list with the :option:`-I` option (see :ref:`invocation`).
+
+:samp:`#include "{file}"`
+  This variant is used for header files of your own program.  It
+  searches for a file named :samp:`{file}` first in the directory containing
+  the current file, then in the quote directories and then the same
+  directories used for ``<file>``.  You can prepend directories
+  to the list of quote directories with the :option:`-iquote` option.
+
+The argument of :samp:`#include`, whether delimited with quote marks or
+angle brackets, behaves like a string constant in that comments are not
+recognized, and macro names are not expanded.  Thus, ``#include
+<x/*y>`` specifies inclusion of a system header file named :samp:`x/*y`.
+
+However, if backslashes occur within :samp:`{file}`, they are considered
+ordinary text characters, not escape characters.  None of the character
+escape sequences appropriate to string constants in C are processed.
+Thus, ``#include "x\n\\y"`` specifies a filename containing three
+backslashes.  (Some systems interpret :samp:`\\` as a pathname separator.
+All of these also interpret :samp:`/` the same way.  It is most portable
+to use only :samp:`/`.)
+
+It is an error if there is anything (other than comments) on the line
+after the file name.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/once-only-headers.rst b/gcc/doc/cpp/header-files/once-only-headers.rst
new file mode 100644
index 00000000000..2ee77771620
--- /dev/null
+++ b/gcc/doc/cpp/header-files/once-only-headers.rst
@@ -0,0 +1,52 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: repeated inclusion, including just once, wrapper #ifndef
+
+.. _once-only-headers:
+
+Once-Only Headers
+*****************
+
+If a header file happens to be included twice, the compiler will process
+its contents twice.  This is very likely to cause an error, e.g. when the
+compiler sees the same structure definition twice.  Even if it does not,
+it will certainly waste time.
+
+The standard way to prevent this is to enclose the entire real contents
+of the file in a conditional, like this:
+
+.. code-block:: c++
+
+  /* File foo.  */
+  #ifndef FILE_FOO_SEEN
+  #define FILE_FOO_SEEN
+
+  the entire file
+
+  #endif /* !FILE_FOO_SEEN */
+
+This construct is commonly known as a :dfn:`wrapper #ifndef`.
+When the header is included again, the conditional will be false,
+because ``FILE_FOO_SEEN`` is defined.  The preprocessor will skip
+over the entire contents of the file, and the compiler will not see it
+twice.
+
+CPP optimizes even further.  It remembers when a header file has a
+wrapper :samp:`#ifndef`.  If a subsequent :samp:`#include` specifies that
+header, and the macro in the :samp:`#ifndef` is still defined, it does
+not bother to rescan the file at all.
+
+You can put comments outside the wrapper.  They will not interfere with
+this optimization.
+
+.. index:: controlling macro, guard macro
+
+The macro ``FILE_FOO_SEEN`` is called the :dfn:`controlling macro` or
+:dfn:`guard macro`.  In a user header file, the macro name should not
+begin with :samp:`_`.  In a system header file, it should begin with
+:samp:`__` to avoid conflicts with user programs.  In any kind of header
+file, the macro name should contain the name of the file and some
+additional text, to avoid conflicts with other header files.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/search-path.rst b/gcc/doc/cpp/header-files/search-path.rst
new file mode 100644
index 00000000000..9f87878517f
--- /dev/null
+++ b/gcc/doc/cpp/header-files/search-path.rst
@@ -0,0 +1,53 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _search-path:
+
+Search Path
+***********
+
+By default, the preprocessor looks for header files included by the quote
+form of the directive ``#include "file"`` first relative to
+the directory of the current file, and then in a preconfigured list
+of standard system directories.
+For example, if :samp:`/usr/include/sys/stat.h` contains
+``#include "types.h"``, GCC looks for :samp:`types.h` first in
+:samp:`/usr/include/sys`, then in its usual search path.
+
+For the angle-bracket form ``#include <file>``, the
+preprocessor's default behavior is to look only in the standard system
+directories.  The exact search directory list depends on the target
+system, how GCC is configured, and where it is installed.  You can
+find the default search directory list for your version of CPP by
+invoking it with the :option:`-v` option.  For example,
+
+.. code-block:: c++
+
+  cpp -v /dev/null -o /dev/null
+
+There are a number of command-line options you can use to add
+additional directories to the search path.
+The most commonly-used option is :option:`-Idir`, which causes
+:samp:`{dir}` to be searched after the current directory (for the quote
+form of the directive) and ahead of the standard system directories.
+You can specify multiple :option:`-I` options on the command line,
+in which case the directories are searched in left-to-right order.
+
+If you need separate control over the search paths for the quote and
+angle-bracket forms of the :samp:`#include` directive, you can use the
+:option:`-iquote` and/or :option:`-isystem` options instead of :option:`-I`.
+See :ref:`invocation`, for a detailed description of these options, as
+well as others that are less generally useful.
+
+If you specify other options on the command line, such as :option:`-I`,
+that affect where the preprocessor searches for header files, the
+directory list printed by the :option:`-v` option reflects the actual
+search path used by the preprocessor.
+
+Note that you can also prevent the preprocessor from searching any of
+the default system header directories with the :option:`-nostdinc`
+option.  This is useful when you are compiling an operating system
+kernel or some other program that does not use the standard C library
+facilities, or the standard C library itself.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/system-headers.rst b/gcc/doc/cpp/header-files/system-headers.rst
new file mode 100644
index 00000000000..ef6474f9dea
--- /dev/null
+++ b/gcc/doc/cpp/header-files/system-headers.rst
@@ -0,0 +1,41 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: system header files
+
+.. _system-headers:
+
+System Headers
+**************
+
+The header files declaring interfaces to the operating system and
+runtime libraries often cannot be written in strictly conforming C.
+Therefore, GCC gives code found in :dfn:`system headers` special
+treatment.  All warnings, other than those generated by :samp:`#warning`
+(see :ref:`diagnostics`), are suppressed while GCC is processing a system
+header.  Macros defined in a system header are immune to a few warnings
+wherever they are expanded.  This immunity is granted on an ad-hoc
+basis, when we find that a warning generates lots of false positives
+because of code in macros defined in system headers.
+
+Normally, only the headers found in specific directories are considered
+system headers.  These directories are determined when GCC is compiled.
+There are, however, two ways to make normal headers into system headers:
+
+* Header files found in directories added to the search path with the
+  :option:`-isystem` and :option:`-idirafter` command-line options are
+  treated as system headers for the purposes of diagnostics.
+
+*
+  .. index:: #pragma GCC system_header
+
+  There is also a directive, ``#pragma GCC system_header``, which
+  tells GCC to consider the rest of the current include file a system
+  header, no matter where it was found.  Code that comes before the
+  :samp:`#pragma` in the file is not affected.  ``#pragma GCC
+  system_header`` has no effect in the primary source file.
+
+On some targets, such as RS/6000 AIX, GCC implicitly surrounds all
+system headers with an :samp:`extern "C"` block when compiling as C++.
\ No newline at end of file
diff --git a/gcc/doc/cpp/header-files/wrapper-headers.rst b/gcc/doc/cpp/header-files/wrapper-headers.rst
new file mode 100644
index 00000000000..848170e138e
--- /dev/null
+++ b/gcc/doc/cpp/header-files/wrapper-headers.rst
@@ -0,0 +1,58 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: wrapper headers, overriding a header file, #include_next
+
+.. _wrapper-headers:
+
+Wrapper Headers
+***************
+
+Sometimes it is necessary to adjust the contents of a system-provided
+header file without editing it directly.  GCC's :command:`fixincludes`
+operation does this, for example.  One way to do that would be to create
+a new header file with the same name and insert it in the search path
+before the original header.  That works fine as long as you're willing
+to replace the old header entirely.  But what if you want to refer to
+the old header from the new one?
+
+You cannot simply include the old header with :samp:`#include`.  That
+will start from the beginning, and find your new header again.  If your
+header is not protected from multiple inclusion (see :ref:`once-only-headers`), it will recurse infinitely and cause a fatal error.
+
+You could include the old header with an absolute pathname:
+
+.. code-block:: c++
+
+  #include "/usr/include/old-header.h"
+
+This works, but is not clean; should the system headers ever move, you
+would have to edit the new headers to match.
+
+There is no way to solve this problem within the C standard, but you can
+use the GNU extension :samp:`#include_next`.  It means, 'Include the
+*next* file with this name'.  This directive works like
+:samp:`#include` except in searching for the specified file: it starts
+searching the list of header file directories *after* the directory
+in which the current file was found.
+
+Suppose you specify :option:`-I /usr/local/include`, and the list of
+directories to search also includes :samp:`/usr/include`; and suppose
+both directories contain :samp:`signal.h`.  Ordinary ``#include
+<signal.h>`` finds the file under :samp:`/usr/local/include`.  If that
+file contains ``#include_next <signal.h>``, it starts searching
+after that directory, and finds the file in :samp:`/usr/include`.
+
+:samp:`#include_next` does not distinguish between ``<file>``
+and ``"file"`` inclusion, nor does it check that the file you
+specify has the same name as the current file.  It simply looks for the
+file named, starting with the directory in the search path after the one
+where the current file was found.
+
+The use of :samp:`#include_next` can lead to great confusion.  We
+recommend it be used only when there is no other alternative.  In
+particular, it should not be used in the headers belonging to a specific
+program; it should be used only to make global corrections along the
+lines of :command:`fixincludes`.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-defined-behavior.rst b/gcc/doc/cpp/implementation-defined-behavior.rst
new file mode 100644
index 00000000000..8946520eefe
--- /dev/null
+++ b/gcc/doc/cpp/implementation-defined-behavior.rst
@@ -0,0 +1,97 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-defined-behavior:
+
+.. _identifier-characters:
+
+Implementation-defined behavior
+*******************************
+
+This is how CPP behaves in all the cases which the C standard
+describes as :dfn:`implementation-defined`.  This term means that the
+implementation is free to do what it likes, but must document its choice
+and stick to it.
+
+.. todo:: Check the C++ standard for more implementation-defined stuff.
+
+* The mapping of physical source file multi-byte characters to the
+  execution character set.
+
+  The input character set can be specified using the
+  :option:`-finput-charset` option, while the execution character set may
+  be controlled using the :option:`-fexec-charset` and
+  :option:`-fwide-exec-charset` options.
+
+* Identifier characters.
+
+  The C and C++ standards allow identifiers to be composed of :samp:`_`
+  and the alphanumeric characters.  C++ also allows universal character
+  names.  C99 and later C standards permit both universal character
+  names and implementation-defined characters.  In both C and C++ modes,
+  GCC accepts in identifiers exactly those extended characters that
+  correspond to universal character names permitted by the chosen
+  standard.
+
+  GCC allows the :samp:`$` character in identifiers as an extension for
+  most targets.  This is true regardless of the std= switch,
+  since this extension cannot conflict with standards-conforming
+  programs.  When preprocessing assembler, however, dollars are not
+  identifier characters by default.
+
+  Currently the targets that by default do not permit :samp:`$` are AVR,
+  IP2K, MMIX, MIPS Irix 3, ARM aout, and PowerPC targets for the AIX
+  operating system.
+
+  You can override the default with :option:`-fdollars-in-identifiers` or
+  :option:`-fno-dollars-in-identifiers`.  See :option:`-fdollars-in-identifiers`.
+
+* Non-empty sequences of whitespace characters.
+
+  In textual output, each whitespace sequence is collapsed to a single
+  space.  For aesthetic reasons, the first token on each non-directive
+  line of output is preceded with sufficient spaces that it appears in the
+  same column as it did in the original source file.
+
+* The numeric value of character constants in preprocessor expressions.
+
+  The preprocessor and compiler interpret character constants in the
+  same way; i.e. escape sequences such as :samp:`\\a` are given the
+  values they would have on the target machine.
+
+  The compiler evaluates a multi-character character constant a character
+  at a time, shifting the previous value left by the number of bits per
+  target character, and then or-ing in the bit-pattern of the new
+  character truncated to the width of a target character.  The final
+  bit-pattern is given type ``int``, and is therefore signed,
+  regardless of whether single characters are signed or not.
+  If there are more
+  characters in the constant than would fit in the target ``int`` the
+  compiler issues a warning, and the excess leading characters are
+  ignored.
+
+  For example, ``'ab'`` for a target with an 8-bit ``char`` would be
+  interpreted as :samp:`(int) ((unsigned char) 'a' * 256 + (unsigned char)
+  'b')`, and ``'\234a'`` as :samp:`(int) ((unsigned char) '\\234' *
+  256 + (unsigned char) 'a')`.
+
+* Source file inclusion.
+
+  For a discussion on how the preprocessor locates header files,
+  :ref:`include-operation`.
+
+* Interpretation of the filename resulting from a macro-expanded
+  :samp:`#include` directive.
+
+  See :ref:`computed-includes`.
+
+* Treatment of a :samp:`#pragma` directive that after macro-expansion
+  results in a standard pragma.
+
+  No macro expansion occurs on any :samp:`#pragma` directive line, so the
+  question does not arise.
+
+  Note that GCC does not yet implement any of the standard
+  pragmas.
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-details.rst b/gcc/doc/cpp/implementation-details.rst
new file mode 100644
index 00000000000..326277b1fc9
--- /dev/null
+++ b/gcc/doc/cpp/implementation-details.rst
@@ -0,0 +1,23 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _implementation-details:
+
+Implementation Details
+----------------------
+
+Here we document details of how the preprocessor's implementation
+affects its user-visible behavior.  You should try to avoid undue
+reliance on behavior described here, as it is possible that it will
+change subtly in future implementations.
+
+Also documented here are obsolete features still supported by CPP.
+
+.. toctree::
+  :maxdepth: 2
+
+  implementation-defined-behavior
+  implementation-limits
+  obsolete-features
\ No newline at end of file
diff --git a/gcc/doc/cpp/implementation-limits.rst b/gcc/doc/cpp/implementation-limits.rst
new file mode 100644
index 00000000000..18cfc6ab0a6
--- /dev/null
+++ b/gcc/doc/cpp/implementation-limits.rst
@@ -0,0 +1,68 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: implementation limits
+
+.. _implementation-limits:
+
+Implementation limits
+*********************
+
+CPP has a small number of internal limits.  This section lists the
+limits which the C standard requires to be no lower than some minimum,
+and all the others known.  It is intended that there should be as few limits
+as possible.  If you encounter an undocumented or inconvenient limit,
+please report that as a bug.  See :ref:`gcc:bugs`.
+
+Where we say something is limited :dfn:`only by available memory`, that
+means that internal data structures impose no intrinsic limit, and space
+is allocated with ``malloc`` or equivalent.  The actual limit will
+therefore depend on many things, such as the size of other things
+allocated by the compiler at the same time, the amount of memory
+consumed by other processes on the same computer, etc.
+
+* Nesting levels of :samp:`#include` files.
+
+  We impose an arbitrary limit of 200 levels, to avoid runaway recursion.
+  The standard requires at least 15 levels.
+
+* Nesting levels of conditional inclusion.
+
+  The C standard mandates this be at least 63.  CPP is limited only by
+  available memory.
+
+* Levels of parenthesized expressions within a full expression.
+
+  The C standard requires this to be at least 63.  In preprocessor
+  conditional expressions, it is limited only by available memory.
+
+* Significant initial characters in an identifier or macro name.
+
+  The preprocessor treats all characters as significant.  The C standard
+  requires only that the first 63 be significant.
+
+* Number of macros simultaneously defined in a single translation unit.
+
+  The standard requires at least 4095 be possible.  CPP is limited only
+  by available memory.
+
+* Number of parameters in a macro definition and arguments in a macro call.
+
+  We allow ``USHRT_MAX``, which is no smaller than 65,535.  The minimum
+  required by the standard is 127.
+
+* Number of characters on a logical source line.
+
+  The C standard requires a minimum of 4096 be permitted.  CPP places
+  no limits on this, but you may get incorrect column numbers reported in
+  diagnostics for lines longer than 65,535 characters.
+
+* Maximum size of a source file.
+
+  The standard does not specify any lower limit on the maximum size of a
+  source file.  GNU cpp maps files into memory, so it is limited by the
+  available address space.  This is generally at least two gigabytes.
+  Depending on the operating system, the size of physical memory may or
+  may not be a limitation.
\ No newline at end of file
diff --git a/gcc/doc/cpp/index.rst b/gcc/doc/cpp/index.rst
new file mode 100644
index 00000000000..e19dfba42a6
--- /dev/null
+++ b/gcc/doc/cpp/index.rst
@@ -0,0 +1,35 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+The C Preprocessor
+==================
+
+The C preprocessor implements the macro language used to transform C,
+C++, and Objective-C programs before they are compiled.  It can also be
+useful on its own.
+
+.. only:: html
+
+  Contents:
+
+.. toctree::
+
+  copyright
+  overview
+  header-files
+  macros
+  conditionals
+  diagnostics
+  line-control
+  pragmas
+  other-directives
+  preprocessor-output
+  traditional-mode
+  implementation-details
+  invocation
+  environment-variables
+  gnu-free-documentation-license
+
+  indices-and-tables
\ No newline at end of file
diff --git a/gcc/doc/cpp/indices-and-tables.rst b/gcc/doc/cpp/indices-and-tables.rst
new file mode 100644
index 00000000000..6c215a391d9
--- /dev/null
+++ b/gcc/doc/cpp/indices-and-tables.rst
@@ -0,0 +1 @@
+.. include:: ../../../doc/indices-and-tables.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/initial-processing.rst b/gcc/doc/cpp/initial-processing.rst
new file mode 100644
index 00000000000..9ca96f21428
--- /dev/null
+++ b/gcc/doc/cpp/initial-processing.rst
@@ -0,0 +1,164 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _initial-processing:
+
+Initial processing
+******************
+
+The preprocessor performs a series of textual transformations on its
+input.  These happen before all other processing.  Conceptually, they
+happen in a rigid order, and the entire file is run through each
+transformation before the next one begins.  CPP actually does them
+all at once, for performance reasons.  These transformations correspond
+roughly to the first three 'phases of translation' described in the C
+standard.
+
+.. index:: line endings
+
+* The input file is read into memory and broken into lines.
+
+  Different systems use different conventions to indicate the end of a
+  line.  GCC accepts the ASCII control sequences LF, CR
+  LF and CR as end-of-line markers.  These are the canonical
+  sequences used by Unix, DOS and VMS, and the classic Mac OS (before
+  OSX) respectively.  You may therefore safely copy source code written
+  on any of those systems to a different one and use it without
+  conversion.  (GCC may lose track of the current line number if a file
+  doesn't consistently use one convention, as sometimes happens when it
+  is edited on computers with different conventions that share a network
+  file system.)
+
+  If the last line of any input file lacks an end-of-line marker, the end
+  of the file is considered to implicitly supply one.  The C standard says
+  that this condition provokes undefined behavior, so GCC will emit a
+  warning message.
+
+.. index:: trigraphs
+
+.. _trigraphs:
+
+* If trigraphs are enabled, they are replaced by their
+  corresponding single characters.  By default GCC ignores trigraphs,
+  but if you request a strictly conforming mode with the :option:`-std`
+  option, or you specify the :option:`-trigraphs` option, then it
+  converts them.
+
+  These are nine three-character sequences, all starting with :samp:`??`,
+  that are defined by ISO C to stand for single characters.  They permit
+  obsolete systems that lack some of C's punctuation to use C.  For
+  example, :samp:`??/` stands for :samp:`\\`, so ``'??/n'`` is a character
+  constant for a newline.
+
+  Trigraphs are not popular and many compilers implement them
+  incorrectly.  Portable code should not rely on trigraphs being either
+  converted or ignored.  With :option:`-Wtrigraphs` GCC will warn you
+  when a trigraph may change the meaning of your program if it were
+  converted.  See :ref:`wtrigraphs`.
+
+  In a string constant, you can prevent a sequence of question marks
+  from being confused with a trigraph by inserting a backslash between
+  the question marks, or by separating the string literal at the
+  trigraph and making use of string literal concatenation.  ``"(??\?)"``
+  is the string :samp:`(???)`, not :samp:`(?]`.  Traditional C compilers
+  do not recognize these idioms.
+
+  The nine trigraphs and their replacements are
+
+  .. code-block::
+
+    Trigraph:       ??(  ??)  ??<  ??>  ??=  ??/  ??'  ??!  ??-
+    Replacement:      [    ]    {    }    #    \    ^    |    ~
+
+.. index:: continued lines, backslash-newline
+
+* Continued lines are merged into one long line.
+
+  A continued line is a line which ends with a backslash, :samp:`\\`.  The
+  backslash is removed and the following line is joined with the current
+  one.  No space is inserted, so you may split a line anywhere, even in
+  the middle of a word.  (It is generally more readable to split lines
+  only at white space.)
+
+  The trailing backslash on a continued line is commonly referred to as a
+  :dfn:`backslash-newline`.
+
+  If there is white space between a backslash and the end of a line, that
+  is still a continued line.  However, as this is usually the result of an
+  editing mistake, and many compilers will not accept it as a continued
+  line, GCC will warn you about it.
+
+.. index:: comments, line comments, block comments
+
+* All comments are replaced with single spaces.
+
+  There are two kinds of comments.  :dfn:`Block comments` begin with
+  :samp:`/*` and continue until the next :samp:`*/`.  Block comments do not
+  nest:
+
+  .. code-block:: c++
+
+    /* this is /* one comment */ text outside comment
+
+  :dfn:`Line comments` begin with :samp:`//` and continue to the end of the
+  current line.  Line comments do not nest either, but it does not matter,
+  because they would end in the same place anyway.
+
+  .. code-block:: c++
+
+    // this is // one comment
+    text outside comment
+
+It is safe to put line comments inside block comments, or vice versa.
+
+.. code-block:: c++
+
+  /* block comment
+     // contains line comment
+     yet more comment
+   */ outside comment
+
+  // line comment /* contains block comment */
+
+But beware of commenting out one end of a block comment with a line
+comment.
+
+.. code-block::
+
+   // l.c.  /* block comment begins
+      oops! this isn't a comment anymore */
+
+Comments are not recognized within string literals.
+``"/* blah */"`` is the string constant :samp:`/\* blah \*/`, not
+an empty string.
+
+Line comments are not in the 1989 edition of the C standard, but they
+are recognized by GCC as an extension.  In C++ and in the 1999 edition
+of the C standard, they are an official part of the language.
+
+Since these transformations happen before all other processing, you can
+split a line mechanically with backslash-newline anywhere.  You can
+comment out the end of a line.  You can continue a line comment onto the
+next line with backslash-newline.  You can even split :samp:`/*`,
+:samp:`*/`, and :samp:`//` onto multiple lines with backslash-newline.
+For example:
+
+.. code-block::
+
+  /\
+  *
+  */ # /*
+  */ defi\
+  ne FO\
+  O 10\
+  20
+
+is equivalent to ``#define FOO 1020``.  All these tricks are
+extremely confusing and should not be used in code intended to be
+readable.
+
+There is no way to prevent a backslash at the end of a line from being
+interpreted as a backslash-newline.  This cannot affect any correct
+program, however.
\ No newline at end of file
diff --git a/gcc/doc/cpp/invocation.rst b/gcc/doc/cpp/invocation.rst
new file mode 100644
index 00000000000..7b13980af5a
--- /dev/null
+++ b/gcc/doc/cpp/invocation.rst
@@ -0,0 +1,81 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: invocation, command line
+
+.. _invocation:
+
+Invocation
+----------
+
+Most often when you use the C preprocessor you do not have to invoke it
+explicitly: the C compiler does so automatically.  However, the
+preprocessor is sometimes useful on its own.  You can invoke the
+preprocessor either with the :command:`cpp` command, or via :command:`gcc -E`.
+In GCC, the preprocessor is actually integrated with the compiler
+rather than a separate program, and both of these commands invoke
+GCC and tell it to stop after the preprocessing phase.
+
+The :command:`cpp` options listed here are also accepted by
+:command:`gcc` and have the same meaning.  Likewise the :command:`cpp`
+command accepts all the usual :command:`gcc` driver options, although those
+pertaining to compilation phases after preprocessing are ignored.
+
+Only options specific to preprocessing behavior are documented here.
+Refer to the GCC manual for full documentation of other driver options.
+
+.. only:: man
+
+  Synopsis
+  ^^^^^^^^
+
+  cpp [ :option:`-D`:samp:`{macro}` [= :samp:`{defn}` ]...] [ :option:`-U`:samp:`{macro}` ]
+      [ :option:`-I`:samp:`{dir}`...] [ :option:`-iquote`:samp:`{dir}`...]
+      [ :option:`-M` | :option:`-MM` ] [ :option:`-MG` ] [ :option:`-MF` :samp:`{filename}` ]
+      [ :option:`-MP` ] [ :option:`-MQ` :samp:`{target}`...]
+      [ :option:`-MT` :samp:`{target}`...]
+      :samp:`{infile}` [[ :option:`-o` ] :samp:`{outfile}` ]
+
+  Only the most useful options are given above; see below for a more
+  complete list of preprocessor-specific options.
+  In addition, :command:`cpp` accepts most :command:`gcc` driver options, which
+  are not listed here.  Refer to the GCC documentation for details.
+
+Options
+^^^^^^^
+
+The :command:`cpp` command expects two file names as arguments, :samp:`{infile}` and
+:samp:`{outfile}`.  The preprocessor reads :samp:`{infile}` together with any
+other files it specifies with :samp:`#include`.  All the output generated
+by the combined input files is written in :samp:`{outfile}`.
+
+Either :samp:`{infile}` or :samp:`{outfile}` may be :option:`-`, which as
+:samp:`{infile}` means to read from standard input and as :samp:`{outfile}`
+means to write to standard output.  If either file is omitted, it
+means the same as if :option:`-` had been specified for that file.
+You can also use the :option:`-o outfile` option to specify the
+output file.
+
+Unless otherwise noted, or the option ends in :samp:`=`, all options
+which take an argument may have that argument appear either immediately
+after the option, or with a space between option and argument:
+:option:`-Ifoo` and :option:`-I foo` have the same effect.
+
+.. index:: grouping options, options, grouping
+
+Many options have multi-letter names; therefore multiple single-letter
+options may *not* be grouped: :option:`-dM` is very different from
+:samp:`-d -M`.
+
+.. index:: options
+
+.. include:: ../../../doc/cppopts.rst
+
+
+.. include:: ../../../doc/cppdiropts.rst
+
+.. only:: man
+
+  .. include:: copyright.rst
\ No newline at end of file
diff --git a/gcc/doc/cpp/line-control.rst b/gcc/doc/cpp/line-control.rst
new file mode 100644
index 00000000000..933d8a9cf1c
--- /dev/null
+++ b/gcc/doc/cpp/line-control.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: line control
+
+.. _line-control:
+
+Line Control
+------------
+
+The C preprocessor informs the C compiler of the location in your source
+code where each token came from.  Presently, this is just the file name
+and line number.  All the tokens resulting from macro expansion are
+reported as having appeared on the line of the source file where the
+outermost macro was used.  We intend to be more accurate in the future.
+
+If you write a program which generates source code, such as the
+:command:`bison` parser generator, you may want to adjust the preprocessor's
+notion of the current file name and line number by hand.  Parts of the
+output from :command:`bison` are generated from scratch, other parts come
+from a standard parser file.  The rest are copied verbatim from
+:command:`bison`'s input.  You would like compiler error messages and
+symbolic debuggers to be able to refer to ``bison`` 's input file.
+
+.. index:: #line
+
+:command:`bison` or any such program can arrange this by writing
+:samp:`#line` directives into the output file.  :samp:`#line` is a
+directive that specifies the original line number and source file name
+for subsequent input in the current preprocessor input file.
+:samp:`#line` has three variants:
+
+:samp:`#line {linenum}`
+  :samp:`{linenum}` is a non-negative decimal integer constant.  It specifies
+  the line number which should be reported for the following line of
+  input.  Subsequent lines are counted from :samp:`{linenum}`.
+
+:samp:`#line {linenum}{filename}`
+  :samp:`{linenum}` is the same as for the first form, and has the same
+  effect.  In addition, :samp:`{filename}` is a string constant.  The
+  following line and all subsequent lines are reported to come from the
+  file it specifies, until something else happens to change that.
+  :samp:`{filename}` is interpreted according to the normal rules for a string
+  constant: backslash escapes are interpreted.  This is different from
+  :samp:`#include`.
+
+:samp:`#line {anything else}`
+  :samp:`{anything else}` is checked for macro calls, which are expanded.
+  The result should match one of the above two forms.
+
+:samp:`#line` directives alter the results of the ``__FILE__`` and
+``__LINE__`` predefined macros from that point on.  See :ref:`standard-predefined-macros`.  They do not have any effect on :samp:`#include`'s
+idea of the directory containing the current file.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros.rst b/gcc/doc/cpp/macros.rst
new file mode 100644
index 00000000000..7355e0719ef
--- /dev/null
+++ b/gcc/doc/cpp/macros.rst
@@ -0,0 +1,37 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. _macros:
+
+Macros
+------
+
+A :dfn:`macro` is a fragment of code which has been given a name.
+Whenever the name is used, it is replaced by the contents of the macro.
+There are two kinds of macros.  They differ mostly in what they look
+like when they are used.  :dfn:`Object-like` macros resemble data objects
+when used, :dfn:`function-like` macros resemble function calls.
+
+You may define any valid identifier as a macro, even if it is a C
+keyword.  The preprocessor does not know anything about keywords.  This
+can be useful if you wish to hide a keyword such as ``const`` from an
+older compiler that does not understand it.  However, the preprocessor
+operator ``defined`` (see :ref:`defined`) can never be defined as a
+macro, and C++'s named operators (see :ref:`c++-named-operators`) cannot be
+macros when you are compiling C++.
+
+.. toctree::
+  :maxdepth: 2
+
+  macros/object-like-macros
+  macros/function-like-macros
+  macros/macro-arguments
+  macros/stringizing
+  macros/concatenation
+  macros/variadic-macros
+  macros/predefined-macros
+  macros/undefining-and-redefining-macros
+  macros/directives-within-macro-arguments
+  macros/macro-pitfalls
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/concatenation.rst b/gcc/doc/cpp/macros/concatenation.rst
new file mode 100644
index 00000000000..2f5066ab65e
--- /dev/null
+++ b/gcc/doc/cpp/macros/concatenation.rst
@@ -0,0 +1,85 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: concatenation, token pasting, token concatenation, ## operator
+
+.. _concatenation:
+
+Concatenation
+*************
+
+It is often useful to merge two tokens into one while expanding macros.
+This is called :dfn:`token pasting` or :dfn:`token concatenation`.  The
+:samp:`##` preprocessing operator performs token pasting.  When a macro
+is expanded, the two tokens on either side of each :samp:`##` operator
+are combined into a single token, which then replaces the :samp:`##` and
+the two original tokens in the macro expansion.  Usually both will be
+identifiers, or one will be an identifier and the other a preprocessing
+number.  When pasted, they make a longer identifier.  This isn't the
+only valid case.  It is also possible to concatenate two numbers (or a
+number and a name, such as ``1.5`` and ``e3``) into a number.
+Also, multi-character operators such as ``+=`` can be formed by
+token pasting.
+
+However, two tokens that don't together form a valid token cannot be
+pasted together.  For example, you cannot concatenate ``x`` with
+``+`` in either order.  If you try, the preprocessor issues a warning
+and emits the two tokens.  Whether it puts white space between the
+tokens is undefined.  It is common to find unnecessary uses of :samp:`##`
+in complex macros.  If you get this warning, it is likely that you can
+simply remove the :samp:`##`.
+
+Both the tokens combined by :samp:`##` could come from the macro body,
+but you could just as well write them as one token in the first place.
+Token pasting is most useful when one or both of the tokens comes from a
+macro argument.  If either of the tokens next to an :samp:`##` is a
+parameter name, it is replaced by its actual argument before :samp:`##`
+executes.  As with stringizing, the actual argument is not
+macro-expanded first.  If the argument is empty, that :samp:`##` has no
+effect.
+
+Keep in mind that the C preprocessor converts comments to whitespace
+before macros are even considered.  Therefore, you cannot create a
+comment by concatenating :samp:`/` and :samp:`*`.  You can put as much
+whitespace between :samp:`##` and its operands as you like, including
+comments, and you can put comments in arguments that will be
+concatenated.  However, it is an error if :samp:`##` appears at either
+end of a macro body.
+
+Consider a C program that interprets named commands.  There probably
+needs to be a table of commands, perhaps an array of structures declared
+as follows:
+
+.. code-block:: c++
+
+  struct command
+  {
+    char *name;
+    void (*function) (void);
+  };
+
+  struct command commands[] =
+  {
+    { "quit", quit_command },
+    { "help", help_command },
+    ...
+  };
+
+It would be cleaner not to have to give each command name twice, once in
+the string constant and once in the function name.  A macro which takes the
+name of a command as an argument can make this unnecessary.  The string
+constant can be created with stringizing, and the function name by
+concatenating the argument with :samp:`_command`.  Here is how it is done:
+
+.. code-block:: c++
+
+  #define COMMAND(NAME)  { #NAME, NAME ## _command }
+
+  struct command commands[] =
+  {
+    COMMAND (quit),
+    COMMAND (help),
+    ...
+  };
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/directives-within-macro-arguments.rst b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
new file mode 100644
index 00000000000..2e7e82563e9
--- /dev/null
+++ b/gcc/doc/cpp/macros/directives-within-macro-arguments.rst
@@ -0,0 +1,39 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: macro arguments and directives
+
+.. _directives-within-macro-arguments:
+
+Directives Within Macro Arguments
+*********************************
+
+Occasionally it is convenient to use preprocessor directives within
+the arguments of a macro.  The C and C++ standards declare that
+behavior in these cases is undefined.  GNU CPP
+processes arbitrary directives within macro arguments in
+exactly the same way as it would have processed the directive were the
+function-like macro invocation not present.
+
+If, within a macro invocation, that macro is redefined, then the new
+definition takes effect in time for argument pre-expansion, but the
+original definition is still used for argument replacement.  Here is a
+pathological example:
+
+.. code-block:: c++
+
+  #define f(x) x x
+  f (1
+  #undef f
+  #define f 2
+  f)
+
+which expands to
+
+.. code-block:: c++
+
+  1 2 1 2
+
+with the semantics described above.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/function-like-macros.rst b/gcc/doc/cpp/macros/function-like-macros.rst
new file mode 100644
index 00000000000..16ba2cf1a1a
--- /dev/null
+++ b/gcc/doc/cpp/macros/function-like-macros.rst
@@ -0,0 +1,55 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: function-like macros
+
+.. _function-like-macros:
+
+Function-like Macros
+********************
+
+You can also define macros whose use looks like a function call.  These
+are called :dfn:`function-like macros`.  To define a function-like macro,
+you use the same :samp:`#define` directive, but you put a pair of
+parentheses immediately after the macro name.  For example,
+
+.. code-block::
+
+  #define lang_init()  c_init()
+  lang_init()
+       → c_init()
+
+A function-like macro is only expanded if its name appears with a pair
+of parentheses after it.  If you write just the name, it is left alone.
+This can be useful when you have a function and a macro of the same
+name, and you wish to use the function sometimes.
+
+.. code-block::
+
+  extern void foo(void);
+  #define foo() /* optimized inline version */
+  ...
+    foo();
+    funcptr = foo;
+
+Here the call to ``foo()`` will use the macro, but the function
+pointer will get the address of the real function.  If the macro were to
+be expanded, it would cause a syntax error.
+
+If you put spaces between the macro name and the parentheses in the
+macro definition, that does not define a function-like macro, it defines
+an object-like macro whose expansion happens to begin with a pair of
+parentheses.
+
+.. code-block::
+
+  #define lang_init ()    c_init()
+  lang_init()
+       → () c_init()()
+
+The first two pairs of parentheses in this expansion come from the
+macro.  The third is the pair that was originally after the macro
+invocation.  Since ``lang_init`` is an object-like macro, it does not
+consume those parentheses.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-arguments.rst b/gcc/doc/cpp/macros/macro-arguments.rst
new file mode 100644
index 00000000000..06911523e7f
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-arguments.rst
@@ -0,0 +1,112 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: arguments, macros with arguments, arguments in macro definitions
+
+.. _macro-arguments:
+
+Macro Arguments
+***************
+
+Function-like macros can take :dfn:`arguments`, just like true functions.
+To define a macro that uses arguments, you insert :dfn:`parameters`
+between the pair of parentheses in the macro definition that make the
+macro function-like.  The parameters must be valid C identifiers,
+separated by commas and optionally whitespace.
+
+To invoke a macro that takes arguments, you write the name of the macro
+followed by a list of :dfn:`actual arguments` in parentheses, separated
+by commas.  The invocation of the macro need not be restricted to a
+single logical line---it can cross as many lines in the source file as
+you wish.  The number of arguments you give must match the number of
+parameters in the macro definition.  When the macro is expanded, each
+use of a parameter in its body is replaced by the tokens of the
+corresponding argument.  (You need not use all of the parameters in the
+macro body.)
+
+As an example, here is a macro that computes the minimum of two numeric
+values, as it is defined in many C programs, and some uses.
+
+.. code-block::
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+    x = min(a, b);          →  x = ((a) < (b) ? (a) : (b));
+    y = min(1, 2);          →  y = ((1) < (2) ? (1) : (2));
+    z = min(a + 28, *p);    →  z = ((a + 28) < (*p) ? (a + 28) : (*p));
+
+(In this small example you can already see several of the dangers of
+macro arguments.  See :ref:`macro-pitfalls`, for detailed explanations.)
+
+Leading and trailing whitespace in each argument is dropped, and all
+whitespace between the tokens of an argument is reduced to a single
+space.  Parentheses within each argument must balance; a comma within
+such parentheses does not end the argument.  However, there is no
+requirement for square brackets or braces to balance, and they do not
+prevent a comma from separating arguments.  Thus,
+
+.. code-block:: c++
+
+  macro (array[x = y, x + 1])
+
+passes two arguments to ``macro`` : ``array[x = y`` and ``x +
+1]``.  If you want to supply ``array[x = y, x + 1]`` as an argument,
+you can write it as ``array[(x = y, x + 1)]``, which is equivalent C
+code.
+
+All arguments to a macro are completely macro-expanded before they are
+substituted into the macro body.  After substitution, the complete text
+is scanned again for macros to expand, including the arguments.  This rule
+may seem strange, but it is carefully designed so you need not worry
+about whether any function call is actually a macro invocation.  You can
+run into trouble if you try to be too clever, though.  See :ref:`argument-prescan`, for detailed discussion.
+
+For example, ``min (min (a, b), c)`` is first expanded to
+
+.. code-block:: c++
+
+    min (((a) < (b) ? (a) : (b)), (c))
+
+and then to
+
+.. code-block:: c++
+
+  ((((a) < (b) ? (a) : (b))) < (c)
+   ? (((a) < (b) ? (a) : (b)))
+   : (c))
+
+(Line breaks shown here for clarity would not actually be generated.)
+
+.. index:: empty macro arguments
+
+You can leave macro arguments empty; this is not an error to the
+preprocessor (but many macros will then expand to invalid code).
+You cannot leave out arguments entirely; if a macro takes two arguments,
+there must be exactly one comma at the top level of its argument list.
+Here are some silly examples using ``min`` :
+
+.. code-block::
+
+  min(, b)        → ((   ) < (b) ? (   ) : (b))
+  min(a, )        → ((a  ) < ( ) ? (a  ) : ( ))
+  min(,)          → ((   ) < ( ) ? (   ) : ( ))
+  min((,),)       → (((,)) < ( ) ? ((,)) : ( ))
+
+  min()      error macro "min" requires 2 arguments, but only 1 given
+  min(,,)    error macro "min" passed 3 arguments, but takes just 2
+
+Whitespace is not a preprocessing token, so if a macro ``foo`` takes
+one argument, ``foo ()`` and ``foo ( )`` both supply it an
+empty argument.  Previous GNU preprocessor implementations and
+documentation were incorrect on this point, insisting that a
+function-like macro that takes a single argument be passed a space if an
+empty argument was required.
+
+Macro parameters appearing inside string literals are not replaced by
+their corresponding actual arguments.
+
+.. code-block::
+
+  #define foo(x) x, "x"
+  foo(bar)        → bar, "x"
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/macro-pitfalls.rst b/gcc/doc/cpp/macros/macro-pitfalls.rst
new file mode 100644
index 00000000000..0be22954a76
--- /dev/null
+++ b/gcc/doc/cpp/macros/macro-pitfalls.rst
@@ -0,0 +1,449 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: problems with macros, pitfalls of macros
+
+.. _macro-pitfalls:
+
+Macro Pitfalls
+**************
+
+In this section we describe some special rules that apply to macros and
+macro expansion, and point out certain cases in which the rules have
+counter-intuitive consequences that you must watch out for.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. _misnesting:
+
+Misnesting
+^^^^^^^^^^
+
+When a macro is called with arguments, the arguments are substituted
+into the macro body and the result is checked, together with the rest of
+the input file, for more macro calls.  It is possible to piece together
+a macro call coming partially from the macro body and partially from the
+arguments.  For example,
+
+.. code-block::
+
+  #define twice(x) (2*(x))
+  #define call_with_1(x) x(1)
+  call_with_1 (twice)
+       → twice(1)
+       → (2*(1))
+
+Macro definitions do not have to have balanced parentheses.  By writing
+an unbalanced open parenthesis in a macro body, it is possible to create
+a macro call that begins inside the macro body but ends outside of it.
+For example,
+
+.. code-block::
+
+  #define strange(file) fprintf (file, "%s %d",
+  ...
+  strange(stderr) p, 35)
+       → fprintf (stderr, "%s %d", p, 35)
+
+The ability to piece together a macro call can be useful, but the use of
+unbalanced open parentheses in a macro body is just confusing, and
+should be avoided.
+
+.. index:: parentheses in macro bodies
+
+.. _operator-precedence-problems:
+
+Operator Precedence Problems
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You may have noticed that in most of the macro definition examples shown
+above, each occurrence of a macro argument name had parentheses around
+it.  In addition, another pair of parentheses usually surround the
+entire macro definition.  Here is why it is best to write macros that
+way.
+
+Suppose you define a macro as follows,
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (x + y - 1) / y
+
+whose purpose is to divide, rounding up.  (One use for this operation is
+to compute how many ``int`` objects are needed to hold a certain
+number of ``char`` objects.)  Then suppose it is used as follows:
+
+.. code-block::
+
+  a = ceil_div (b & c, sizeof (int));
+       → a = (b & c + sizeof (int) - 1) / sizeof (int);
+
+This does not do what is intended.  The operator-precedence rules of
+C make it equivalent to this:
+
+.. code-block:: c++
+
+  a = (b & (c + sizeof (int) - 1)) / sizeof (int);
+
+What we want is this:
+
+.. code-block:: c++
+
+  a = ((b & c) + sizeof (int) - 1)) / sizeof (int);
+
+Defining the macro as
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) ((x) + (y) - 1) / (y)
+
+provides the desired result.
+
+Unintended grouping can result in another way.  Consider ``sizeof
+ceil_div(1, 2)``.  That has the appearance of a C expression that would
+compute the size of the type of ``ceil_div (1, 2)``, but in fact it
+means something very different.  Here is what it expands to:
+
+.. code-block:: c++
+
+  sizeof ((1) + (2) - 1) / (2)
+
+This would take the size of an integer and divide it by two.  The
+precedence rules have put the division outside the ``sizeof`` when it
+was intended to be inside.
+
+Parentheses around the entire macro definition prevent such problems.
+Here, then, is the recommended way to define ``ceil_div`` :
+
+.. code-block:: c++
+
+  #define ceil_div(x, y) (((x) + (y) - 1) / (y))
+
+.. index:: semicolons (after macro calls)
+
+.. _swallowing-the-semicolon:
+
+Swallowing the Semicolon
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+Often it is desirable to define a macro that expands into a compound
+statement.  Consider, for example, the following macro, that advances a
+pointer (the argument ``p`` says where to find it) across whitespace
+characters:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)  \
+  { char *lim = (limit);         \
+    while (p < lim) {            \
+      if (*p++ != ' ') {         \
+        p--; break; }}}
+
+Here backslash-newline is used to split the macro definition, which must
+be a single logical line, so that it resembles the way such code would
+be laid out if not part of a macro definition.
+
+A call to this macro might be ``SKIP_SPACES (p, lim)``.  Strictly
+speaking, the call expands to a compound statement, which is a complete
+statement with no need for a semicolon to end it.  However, since it
+looks like a function call, it minimizes confusion if you can use it
+like a function call, writing a semicolon afterward, as in
+``SKIP_SPACES (p, lim);``
+
+This can cause trouble before ``else`` statements, because the
+semicolon is actually a null statement.  Suppose you write
+
+.. code-block:: c++
+
+  if (*p != 0)
+    SKIP_SPACES (p, lim);
+  else ...
+
+The presence of two statements---the compound statement and a null
+statement---in between the ``if`` condition and the ``else``
+makes invalid C code.
+
+The definition of the macro ``SKIP_SPACES`` can be altered to solve
+this problem, using a ``do ... while`` statement.  Here is how:
+
+.. code-block:: c++
+
+  #define SKIP_SPACES(p, limit)     \
+  do { char *lim = (limit);         \
+       while (p < lim) {            \
+         if (*p++ != ' ') {         \
+           p--; break; }}}          \
+  while (0)
+
+Now ``SKIP_SPACES (p, lim);`` expands into
+
+.. code-block:: c++
+
+  do {...} while (0);
+
+which is one statement.  The loop executes exactly once; most compilers
+generate no extra code for it.
+
+.. index:: side effects (in macro arguments), unsafe macros
+
+.. _duplication-of-side-effects:
+
+Duplication of Side Effects
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Many C programs define a macro ``min``, for 'minimum', like this:
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+
+When you use this macro with an argument containing a side effect,
+as shown here,
+
+.. code-block:: c++
+
+  next = min (x + y, foo (z));
+
+it expands as follows:
+
+.. code-block:: c++
+
+  next = ((x + y) < (foo (z)) ? (x + y) : (foo (z)));
+
+where ``x + y`` has been substituted for ``X`` and ``foo (z)``
+for ``Y``.
+
+The function ``foo`` is used only once in the statement as it appears
+in the program, but the expression ``foo (z)`` has been substituted
+twice into the macro expansion.  As a result, ``foo`` might be called
+two times when the statement is executed.  If it has side effects or if
+it takes a long time to compute, the results might not be what you
+intended.  We say that ``min`` is an :dfn:`unsafe` macro.
+
+The best solution to this problem is to define ``min`` in a way that
+computes the value of ``foo (z)`` only once.  The C language offers
+no standard way to do this, but it can be done with GNU extensions as
+follows:
+
+.. code-block:: c++
+
+  #define min(X, Y)                \
+  ({ typeof (X) x_ = (X);          \
+     typeof (Y) y_ = (Y);          \
+     (x_ < y_) ? x_ : y_; })
+
+The :samp:`({ ... })` notation produces a compound statement that
+acts as an expression.  Its value is the value of its last statement.
+This permits us to define local variables and assign each argument to
+one.  The local variables have underscores after their names to reduce
+the risk of conflict with an identifier of wider scope (it is impossible
+to avoid this entirely).  Now each argument is evaluated exactly once.
+
+If you do not wish to use GNU C extensions, the only solution is to be
+careful when *using* the macro ``min``.  For example, you can
+calculate the value of ``foo (z)``, save it in a variable, and use
+that variable in ``min`` :
+
+.. code-block:: c++
+
+  #define min(X, Y)  ((X) < (Y) ? (X) : (Y))
+  ...
+  {
+    int tem = foo (z);
+    next = min (x + y, tem);
+  }
+
+(where we assume that ``foo`` returns type ``int``).
+
+.. index:: self-reference
+
+.. _self-referential-macros:
+
+Self-Referential Macros
+^^^^^^^^^^^^^^^^^^^^^^^
+
+A :dfn:`self-referential` macro is one whose name appears in its
+definition.  Recall that all macro definitions are rescanned for more
+macros to replace.  If the self-reference were considered a use of the
+macro, it would produce an infinitely large expansion.  To prevent this,
+the self-reference is not considered a macro call.  It is passed into
+the preprocessor output unchanged.  Consider an example:
+
+.. code-block:: c++
+
+  #define foo (4 + foo)
+
+where ``foo`` is also a variable in your program.
+
+Following the ordinary rules, each reference to ``foo`` will expand
+into ``(4 + foo)`` ; then this will be rescanned and will expand into
+``(4 + (4 + foo))`` ; and so on until the computer runs out of memory.
+
+The self-reference rule cuts this process short after one step, at
+``(4 + foo)``.  Therefore, this macro definition has the possibly
+useful effect of causing the program to add 4 to the value of ``foo``
+wherever ``foo`` is referred to.
+
+In most cases, it is a bad idea to take advantage of this feature.  A
+person reading the program who sees that ``foo`` is a variable will
+not expect that it is a macro as well.  The reader will come across the
+identifier ``foo`` in the program and think its value should be that
+of the variable ``foo``, whereas in fact the value is four greater.
+
+One common, useful use of self-reference is to create a macro which
+expands to itself.  If you write
+
+.. code-block:: c++
+
+  #define EPERM EPERM
+
+then the macro ``EPERM`` expands to ``EPERM``.  Effectively, it is
+left alone by the preprocessor whenever it's used in running text.  You
+can tell that it's a macro with :samp:`#ifdef`.  You might do this if you
+want to define numeric constants with an ``enum``, but have
+:samp:`#ifdef` be true for each constant.
+
+If a macro ``x`` expands to use a macro ``y``, and the expansion of
+``y`` refers to the macro ``x``, that is an :dfn:`indirect
+self-reference` of ``x``.  ``x`` is not expanded in this case
+either.  Thus, if we have
+
+.. code-block:: c++
+
+  #define x (4 + y)
+  #define y (2 * x)
+
+then ``x`` and ``y`` expand as follows:
+
+.. code-block::
+
+  x    → (4 + y)
+       → (4 + (2 * x))
+
+  y    → (2 * x)
+       → (2 * (4 + y))
+
+Each macro is expanded when it appears in the definition of the other
+macro, but not when it indirectly appears in its own definition.
+
+.. index:: expansion of arguments, macro argument expansion, prescan of macro arguments
+
+.. _argument-prescan:
+
+Argument Prescan
+^^^^^^^^^^^^^^^^
+
+Macro arguments are completely macro-expanded before they are
+substituted into a macro body, unless they are stringized or pasted
+with other tokens.  After substitution, the entire macro body, including
+the substituted arguments, is scanned again for macros to be expanded.
+The result is that the arguments are scanned *twice* to expand
+macro calls in them.
+
+Most of the time, this has no effect.  If the argument contained any
+macro calls, they are expanded during the first scan.  The result
+therefore contains no macro calls, so the second scan does not change
+it.  If the argument were substituted as given, with no prescan, the
+single remaining scan would find the same macro calls and produce the
+same results.
+
+You might expect the double scan to change the results when a
+self-referential macro is used in an argument of another macro
+(see :ref:`self-referential-macros`): the self-referential macro would be
+expanded once in the first scan, and a second time in the second scan.
+However, this is not what happens.  The self-references that do not
+expand in the first scan are marked so that they will not expand in the
+second scan either.
+
+You might wonder, 'Why mention the prescan, if it makes no difference?
+And why not skip it and make the preprocessor faster?'  The answer is
+that the prescan does make a difference in three special cases:
+
+* Nested calls to a macro.
+
+  We say that :dfn:`nested` calls to a macro occur when a macro's argument
+  contains a call to that very macro.  For example, if ``f`` is a macro
+  that expects one argument, ``f (f (1))`` is a nested pair of calls to
+  ``f``.  The desired expansion is made by expanding ``f (1)`` and
+  substituting that into the definition of ``f``.  The prescan causes
+  the expected result to happen.  Without the prescan, ``f (1)`` itself
+  would be substituted as an argument, and the inner use of ``f`` would
+  appear during the main scan as an indirect self-reference and would not
+  be expanded.
+
+* Macros that call other macros that stringize or concatenate.
+
+  If an argument is stringized or concatenated, the prescan does not
+  occur.  If you *want* to expand a macro, then stringize or
+  concatenate its expansion, you can do that by causing one macro to call
+  another macro that does the stringizing or concatenation.  For
+  instance, if you have
+
+  .. code-block:: c++
+
+    #define AFTERX(x) X_ ## x
+    #define XAFTERX(x) AFTERX(x)
+    #define TABLESIZE 1024
+    #define BUFSIZE TABLESIZE
+
+  then ``AFTERX(BUFSIZE)`` expands to ``X_BUFSIZE``, and
+  ``XAFTERX(BUFSIZE)`` expands to ``X_1024``.  (Not to
+  ``X_TABLESIZE``.  Prescan always does a complete expansion.)
+
+* Macros used in arguments, whose expansions contain unshielded commas.
+
+  This can cause a macro expanded on the second scan to be called with the
+  wrong number of arguments.  Here is an example:
+
+  .. code-block:: c++
+
+    #define foo  a,b
+    #define bar(x) lose(x)
+    #define lose(x) (1 + (x))
+
+  We would like ``bar(foo)`` to turn into ``(1 + (foo))``, which
+  would then turn into ``(1 + (a,b))``.  Instead, ``bar(foo)``
+  expands into ``lose(a,b)``, and you get an error because ``lose``
+  requires a single argument.  In this case, the problem is easily solved
+  by the same parentheses that ought to be used to prevent misnesting of
+  arithmetic operations:
+
+  .. code-block::
+
+    #define foo (a,b)
+    or#define bar(x) lose((x))
+
+  The extra pair of parentheses prevents the comma in ``foo`` 's
+  definition from being interpreted as an argument separator.
+
+.. index:: newlines in macro arguments
+
+.. _newlines-in-arguments:
+
+Newlines in Arguments
+^^^^^^^^^^^^^^^^^^^^^
+
+The invocation of a function-like macro can extend over many logical
+lines.  However, in the present implementation, the entire expansion
+comes out on one line.  Thus line numbers emitted by the compiler or
+debugger refer to the line the invocation started on, which might be
+different to the line containing the argument causing the problem.
+
+Here is an example illustrating this:
+
+.. code-block:: c++
+
+  #define ignore_second_arg(a,b,c) a; c
+
+  ignore_second_arg (foo (),
+                     ignored (),
+                     syntax error);
+
+The syntax error triggered by the tokens ``syntax error`` results in
+an error message citing line three---the line of ignore_second_arg---
+even though the problematic code comes from line five.
+
+We consider this a bug, and intend to fix it in the near future.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/object-like-macros.rst b/gcc/doc/cpp/macros/object-like-macros.rst
new file mode 100644
index 00000000000..c5e6e4cd466
--- /dev/null
+++ b/gcc/doc/cpp/macros/object-like-macros.rst
@@ -0,0 +1,126 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: object-like macro, symbolic constants, manifest constants
+
+.. _object-like-macros:
+
+Object-like Macros
+******************
+
+An :dfn:`object-like macro` is a simple identifier which will be replaced
+by a code fragment.  It is called object-like because it looks like a
+data object in code that uses it.  They are most commonly used to give
+symbolic names to numeric constants.
+
+.. index:: #define
+
+You create macros with the :samp:`#define` directive.  :samp:`#define` is
+followed by the name of the macro and then the token sequence it should
+be an abbreviation for, which is variously referred to as the macro's
+:dfn:`body`, :dfn:`expansion` or :dfn:`replacement list`.  For example,
+
+.. code-block:: c++
+
+  #define BUFFER_SIZE 1024
+
+defines a macro named ``BUFFER_SIZE`` as an abbreviation for the
+token ``1024``.  If somewhere after this :samp:`#define` directive
+there comes a C statement of the form
+
+.. code-block:: c++
+
+  foo = (char *) malloc (BUFFER_SIZE);
+
+then the C preprocessor will recognize and :dfn:`expand` the macro
+``BUFFER_SIZE``.  The C compiler will see the same tokens as it would
+if you had written
+
+.. code-block:: c++
+
+  foo = (char *) malloc (1024);
+
+By convention, macro names are written in uppercase.  Programs are
+easier to read when it is possible to tell at a glance which names are
+macros.
+
+The macro's body ends at the end of the :samp:`#define` line.  You may
+continue the definition onto multiple lines, if necessary, using
+backslash-newline.  When the macro is expanded, however, it will all
+come out on one line.  For example,
+
+.. code-block::
+
+  #define NUMBERS 1, \
+                  2, \
+                  3
+  int x[] = { NUMBERS };
+       → int x[] = { 1, 2, 3 };
+
+The most common visible consequence of this is surprising line numbers
+in error messages.
+
+There is no restriction on what can go in a macro body provided it
+decomposes into valid preprocessing tokens.  Parentheses need not
+balance, and the body need not resemble valid C code.  (If it does not,
+you may get error messages from the C compiler when you use the macro.)
+
+The C preprocessor scans your program sequentially.  Macro definitions
+take effect at the place you write them.  Therefore, the following input
+to the C preprocessor
+
+.. code-block:: c++
+
+  foo = X;
+  #define X 4
+  bar = X;
+
+produces
+
+.. code-block:: c++
+
+  foo = X;
+  bar = 4;
+
+When the preprocessor expands a macro name, the macro's expansion
+replaces the macro invocation, then the expansion is examined for more
+macros to expand.  For example,
+
+.. code-block::
+
+  #define TABLESIZE BUFSIZE
+  #define BUFSIZE 1024
+  TABLESIZE
+       → BUFSIZE
+       → 1024
+
+``TABLESIZE`` is expanded first to produce ``BUFSIZE``, then that
+macro is expanded to produce the final result, ``1024``.
+
+Notice that ``BUFSIZE`` was not defined when ``TABLESIZE`` was
+defined.  The :samp:`#define` for ``TABLESIZE`` uses exactly the
+expansion you specify---in this case, ``BUFSIZE`` ---and does not
+check to see whether it too contains macro names.  Only when you
+*use* ``TABLESIZE`` is the result of its expansion scanned for
+more macro names.
+
+This makes a difference if you change the definition of ``BUFSIZE``
+at some point in the source file.  ``TABLESIZE``, defined as shown,
+will always expand using the definition of ``BUFSIZE`` that is
+currently in effect:
+
+.. code-block:: c++
+
+  #define BUFSIZE 1020
+  #define TABLESIZE BUFSIZE
+  #undef BUFSIZE
+  #define BUFSIZE 37
+
+Now ``TABLESIZE`` expands (in two stages) to ``37``.
+
+If the expansion of a macro contains its own name, either directly or
+via intermediate macros, it is not expanded again when the expansion is
+examined for more macros.  This prevents infinite recursion.
+See :ref:`self-referential-macros`, for the precise details.
\ No newline at end of file
diff --git a/gcc/doc/cpp/macros/predefined-macros.rst b/gcc/doc/cpp/macros/predefined-macros.rst
new file mode 100644
index 00000000000..8af566e0dc3
--- /dev/null
+++ b/gcc/doc/cpp/macros/predefined-macros.rst
@@ -0,0 +1,874 @@
+..
+  Copyright 1988-2022 Free Software Foundation, Inc.
+  This is part of the GCC manual.
+  For copying conditions, see the copyright.rst file.
+
+.. index:: predefined macros
+
+.. _predefined-macros:
+
+Predefined Macros
+*****************
+
+Several object-like macros are predefined; you use them without
+supplying their definitions.  They fall into three classes: standard,
+common, and system-specific.
+
+In C++, there is a fourth category, the named operators.  They act like
+predefined macros, but you cannot undefine them.
+
+.. toctree::
+  :maxdepth: 2
+
+
+.. index:: standard predefined macros.
+
+.. _standard-predefined-macros:
+
+Standard Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The standard predefined macros are specified by the relevant
+language standards, so they are available with all compilers that
+implement those standards.  Older compilers may not provide all of
+them.  Their names all start with double underscores.
+
+.. c:macro:: __FILE__
+
+  This macro expands to the name of the current input file, in the form of
+  a C string constant.  This is the path by which the preprocessor opened
+  the file, not the short name specified in :samp:`#include` or as the
+  input file name argument.  For example,
+  ``"/usr/local/include/myheader.h"`` is a possible expansion of this
+  macro.
+
+.. c:macro:: __LINE__
+
+  This macro expands to the current input line number, in the form of a
+  decimal integer constant.  While we call it a predefined macro, it's
+  a pretty strange macro, since its 'definition' changes with each
+  new line of source code.
+
+  ``__FILE__`` and ``__LINE__`` are useful in generating an error
+  message to report an inconsistency detected by the program; the message
+  can state the source line at which the inconsistency was detected.  For
+  example,
+
+.. code-block:: c++
+
+  fprintf (stderr, "Internal error: "
+                   "negative string length "
+                   "%d at %s, line %d.",
+           length, __FILE__, __LINE__);
+
+An :samp:`#include` directive changes the expansions of ``__FILE__``
+and ``__LINE__`` to correspond to the included file.  At the end of
+that file, when processing resumes on the input file that contained
+the :samp:`#include` directive, the expansions of ``__FILE__`` and
+``__LINE__`` revert to the values they had before the
+:samp:`#include` (but ``__LINE__`` is then incremented by one as
+processing moves to the line after the :samp:`#include`).
+
+A :samp:`#line` directive changes ``__LINE__``, and may change
+``__FILE__`` as well.  See :ref:`line-control`.
+
+C99 introduced ``__func__``, and GCC has provided ``__FUNCTION__``
+for a long time.  Both of these are strings containing the name of the
+current function (there are slight semantic differences; see the GCC
+manual).  Neither of them is a macro; the preprocessor does not know the
+name of the current function.  They tend to be useful in conjunction
+with ``__FILE__`` and ``__LINE__``, though.
+
+.. c:macro:: __DATE__
+
+  This macro expands to a string constant that describes the date on which
+  the preprocessor is being run.  The string constant contains eleven
+  characters and looks like ``"Feb 12 1996"``.  If the day of the
+  month is less than 10, it is padded with a space on the left.
+
+  If GCC cannot determine the current date, it will emit a warning message
+  (once per compilation) and ``__DATE__`` will expand to
+  ``"??? ?? ????"``.
+
+.. c:macro:: __TIME__
+
+  This macro expands to a string constant that describes the time at
+  which the preprocessor is being run.  The string constant contains
+  eight characters and looks like ``"23:59:01"``.
+
+  If GCC cannot determine the current time, it will emit a warning message
+  (once per compilation) and ``__TIME__`` will expand to
+  ``"??:??:??"``.
+
+.. c:macro:: __STDC__
+
+  In normal operation, this macro expands to the constant 1, to signify
+  that this compiler conforms to ISO Standard C.  If GNU CPP is used with
+  a compiler other than GCC, this is not necessarily true; however, the
+  preprocessor always conforms to the standard unless the
+  :option:`-traditional-cpp` option is used.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is used.
+
+  On some hosts, the system compiler uses a different convention, where
+  ``__STDC__`` is normally 0, but is 1 if the user specifies strict
+  conformance to the C Standard.  CPP follows the host convention when
+  processing system header files, but when processing user files
+  ``__STDC__`` is always 1.  This has been reported to cause problems;
+  for instance, some versions of Solaris provide X Windows headers that
+  expect ``__STDC__`` to be either undefined or 1.  See :ref:`invocation`.
+
+.. c:macro:: __STDC_VERSION__
+
+  This macro expands to the C Standard's version number, a long integer
+  constant of the form ``yyyymmL`` where :samp:`{yyyy}` and
+  :samp:`{mm}` are the year and month of the Standard version.  This signifies
+  which version of the C Standard the compiler conforms to.  Like
+  ``__STDC__``, this is not necessarily accurate for the entire
+  implementation, unless GNU CPP is being used with GCC.
+
+  The value ``199409L`` signifies the 1989 C standard as amended in
+  1994, which is the current default; the value ``199901L`` signifies
+  the 1999 revision of the C standard; the value ``201112L``
+  signifies the 2011 revision of the C standard; the value
+  ``201710L`` signifies the 2017 revision of the C standard (which is
+  otherwise identical to the 2011 version apart from correction of
+  defects).  An unspecified value larger than ``201710L`` is used for
+  the experimental :option:`-std=c2x` and :option:`-std=gnu2x` modes.
+
+  This macro is not defined if the :option:`-traditional-cpp` option is
+  used, nor when compiling C++ or Objective-C.
+
+.. c:macro:: __STDC_HOSTED__
+
+  This macro is defined, with value 1, if the compiler's target is a
+  :dfn:`hosted environment`.  A hosted environment has the complete
+  facilities of the standard C library available.
+
+.. c:macro:: __cplusplus
+
+  This macro is defined when the C++ compiler is in use.  You can use
+  ``__cplusplus`` to test whether a header is compiled by a C compiler
+  or a C++ compiler.  This macro is similar to ``__STDC_VERSION__``, in
+  that it expands to a version number.  Depending on the language standard
+  selected, the value of the macro is
+  ``199711L`` for the 1998 C++ standard,
+  ``201103L`` for the 2011 C++ standard,
+  ``201402L`` for the 2014 C++ standard,
+  ``201703L`` for the 2017 C++ standard,
+  ``202002L`` for the 2020 C++ standard,
+  or an unspecified value strictly larger than ``202002L`` for the
+  experimental languages enabled by :option:`-std=c++23` and
+  :option:`-std=gnu++23`.
+
+.. c:macro:: __OBJC__
+
+  This macro is defined, with value 1, when the Objective-C compiler is in
+  use.  You can use ``__OBJC__`` to test whether a header is compiled
+  by a C compiler or an Objective-C compiler.
+
+.. c:macro:: __ASSEMBLER__
+
+  This macro is defined with value 1 when preprocessing assembly
+  language.
+
+.. index:: common predefined macros
+
+.. _common-predefined-macros:
+
+Common Predefined Macros
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+The common predefined macros are GNU C extensions.  They are available
+with the same meanings regardless of the machine or operating system on
+which you are using GNU C or GNU Fortran.  Their names all start with
+double underscores.
+
+.. c:macro:: __COUNTER__
+
+  This macro expands to sequential integral values starting from 0.  In
+  conjunction with the ``##`` operator, this provides a convenient means to
+  generate unique identifiers.  Care must be taken to ensure that
+  ``__COUNTER__`` is not expanded prior to inclusion of precompiled headers
+  which use it.  Otherwise, the precompiled headers will not be used.
+
+.. c:macro:: __GFORTRAN__
+
+  The GNU Fortran compiler defines this.
+
+.. c:macro:: __GNUC__
+             __GNUC_MINOR__
+             __GNUC_PATCHLEVEL__
+
+  These macros are defined by all GNU compilers that use the C
+  preprocessor: C, C++, Objective-C and Fortran.  Their values are the major
+  version, minor version, and patch level of the compiler, as integer
+  constants.  For example, GCC version :samp:`{x}`. :samp:`{y}`. :samp:`{z}`
+  defines ``__GNUC__`` to :samp:`{x}`, ``__GNUC_MINOR__`` to :samp:`{y}`,
+  and ``__GNUC_PATCHLEVEL__`` to :samp:`{z}`.  These
+  macros are also defined if you invoke the preprocessor directly.
+
+  If all you need to know is whether or not your program is being compiled
+  by GCC, or a non-GCC compiler that claims to accept the GNU C dialects,
+  you can simply test ``__GNUC__``.  If you need to write code
+  which depends on a specific version, you must be more careful.  Each
+  time the minor version is increased, the patch level is reset to zero;
+  each time the major version is increased, the
+  minor version and patch level are reset.  If you wish to use the
+  predefined macros directly in the conditional, you will need to write it
+  like this:
+
+  .. code-block:: c++
+
+    /* Test for GCC > 3.2.0 */
+    #if __GNUC__ > 3 || \
+        (__GNUC__ == 3 && (__GNUC_MINOR__ > 2 || \
+                           (__GNUC_MINOR__ == 2 && \
+                            __GNUC_PATCHLEVEL__ > 0))
+
+  Another approach is to use the predefined macros to
+  calculate a single number, then compare that against a threshold:
+
+  .. code-block:: c++
+
+    #define GCC_VERSION (__GNUC__ * 10000 \
+                         + __GNUC_MINOR__ * 100 \
+                         + __GNUC_PATCHLEVEL__)
+    ...
+    /* Test for GCC > 3.2.0 */
+    #if GCC_VERSION > 30200
+
+  Many people find this form easier to understand.
+
+.. c:macro:: __GNUG__
+
+  The GNU C++ compiler defines this.  Testing it is equivalent to
+  testing ``(__GNUC__ && __cplusplus)``.
+
+.. c:macro:: __STRICT_ANSI__
+
+  GCC defines this macro if and only if the :option:`-ansi` switch, or a
+  :option:`-std` switch specifying strict conformance to some version of ISO C
+  or ISO C++, was specified when GCC was invoked.  It is defined to :samp:`1`.
+  This macro exists primarily to direct GNU libc's header files to use only
+  definitions found in standard C.
+
+.. c:macro:: __BASE_FILE__
+
+  This macro expands to the name of the main input file, in the form
+  of a C string constant.  This is the source file that was specified
+  on the command line of the preprocessor or C compiler.
+
+.. c:macro:: __FILE_NAME__
+
+  This macro expands to the basename of the current input file, in the
+  form of a C string constant.  This is the last path component by which
+  the preprocessor opened the file.  For example, processing
+  ``"/usr/local/include/myheader.h"`` would set this
+  macro to ``"myheader.h"``.
+
+.. c:macro:: __INCLUDE_LEVEL__
+
+  This macro expands to a decimal integer constant that represents the
+  depth of nesting in include files.  The value of this macro is
+  incremented on every :samp:`#include` directive and decremented at the
+  end of every included file.  It starts out at 0, its value within the
+  base file specified on the command line.
+
+.. c:macro:: __ELF__
+
+  This macro is defined if the target uses the ELF object format.
+
+.. c:macro:: __VERSION__
+
+  This macro expands to a string constant which describes the version of
+  the compiler in use.  You should not rely on its contents having any
+  particular form, but it can be counted on to contain at least the
+  release number.
+
+.. c:macro:: __OPTIMIZE__
+             __OPTIMIZE_SIZE__
+             __NO_INLINE__
+
+  These macros describe the compilation mode.  ``__OPTIMIZE__`` is
+  defined in all optimizing compilations.  ``__OPTIMIZE_SIZE__`` is
+  defined if the compiler is optimizing for size, not speed.
+  ``__NO_INLINE__`` is defined if no functions will be inlined into
+  their callers (when not optimizing, or when inlining has been
+  specifically disabled by :option:`-fno-inline`).
+
+  These macros cause certain GNU header files to provide optimized
+  definitions, using macros or inline functions, of system library
+  functions.  You should not use these macros in any way unless you make
+  sure that programs will execute with the same effect whether or not they
+  are defined.  If they are defined, their value is 1.
+
+.. c:macro:: __GNUC_GNU_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled in GCC's traditional gnu90 mode.  Object files will contain
+  externally visible definitions of all functions declared ``inline``
+  without ``extern`` or ``static``.  They will not contain any
+  definitions of any functions declared ``extern inline``.
+
+.. c:macro:: __GNUC_STDC_INLINE__
+
+  GCC defines this macro if functions declared ``inline`` will be
+  handled according to the ISO C99 or later standards.  Object files will contain
+  externally visible definitions of all functions declared ``extern
+  inline``.  They will not contain definitions of any functions declared
+  ``inline`` without ``extern``.
+
+  If this macro is defined, GCC supports the ``gnu_inline`` function
+  attribute as a way to always get the gnu90 behavior.
+
+.. c:macro:: __CHAR_UNSIGNED__
+
+  GCC defines this macro if and only if the data type ``char`` is
+  unsigned on the target machine.  It exists to cause the standard header
+  file :samp:`limits.h` to work correctly.  You should not use this macro
+  yourself; instead, refer to the standard macros defined in :samp:`limits.h`.
+
+.. c:macro:: __WCHAR_UNSIGNED__
+
+  Like ``__CHAR_UNSIGNED__``, this macro is defined if and only if the
+  data type ``wchar_t`` is unsigned and the front-end is in C++ mode.
+
+.. c:macro:: __REGISTER_PREFIX__
+
+  This macro expands to a single token (not a string constant) which is
+  the prefix applied to CPU register names in assembly language for this
+  target.  You can use it to write assembly that is usable in multiple
+  environments.  For example, in the ``m68k-aout`` environment it
+  expands to nothing, but in the ``m68k-coff`` environment it expands
+  to a single :samp:`%`.
+
+.. c:macro:: __USER_LABEL_PREFIX__
+
+  This macro expands to a single token which is the prefix applied to
+  user labels (symbols visible to C code) in assembly.  For example, in
+  the ``m68k-aout`` environment it expands to an :samp:`_`, but in the
+  ``m68k-coff`` environment it expands to nothing.
+
+  This macro will have the correct definition even if
+  :option:`-f(no-)underscores` is in use, but it will not be correct if
+  target-specific options that adjust this prefix are used (e.g. the
+  OSF/rose :option:`-mno-underscores` option).
+
+.. c:macro:: __SIZE_TYPE__
+             __PTRDIFF_TYPE__
+             __WCHAR_TYPE__
+             __WINT_TYPE__
+             __INTMAX_TYPE__
+             __UINTMAX_TYPE__
+             __SIG_ATOMIC_TYPE__
+             __INT8_TYPE__
+             __INT16_TYPE__
+             __INT32_TYPE__
+             __INT64_TYPE__
+             __UINT8_TYPE__
+             __UINT16_TYPE__
+             __UINT32_TYPE__
+             __UINT64_TYPE__
+             __INT_LEAST8_TYPE__
+             __INT_LEAST16_TYPE__
+             __INT_LEAST32_TYPE__
+             __INT_LEAST64_TYPE__
+             __UINT_LEAST8_TYPE__
+             __UINT_LEAST16_TYPE__
+             __UINT_LEAST32_TYPE__
+             __UINT_LEAST64_TYPE__
+             __INT_FAST8_TYPE__
+             __INT_FAST16_TYPE__
+             __INT_FAST32_TYPE__
+             __INT_FAST64_TYPE__
+             __UINT_FAST8_TYPE__
+             __UINT_FAST16_TYPE__
+             __UINT_FAST32_TYPE__
+             __UINT_FAST64_TYPE__
+             __INTPTR_TYPE__
+             __UINTPTR_TYPE__
+
+  These macros are defined to the correct underlying types for the
+  ``size_t``, ``ptrdiff_t``, ``wchar_t``, ``wint_t``,
+  ``intmax_t``, ``uintmax_t``, ``sig_atomic_t``, ``int8_t``,
+  ``int16_t``, ``int32_t``, ``int64_t``, ``uint8_t``,
+  ``uint16_t``, ``uint32_t``, ``uint64_t``,
+  ``int_least8_t``, ``int_least16_t``, ``int_least32_t``,
+  ``int_least64_t``, ``uint_least8_t``, ``uint_least16_t``,
+  ``uint_least32_t``, ``uint_least64_t``, ``int_fast8_t``,
+  ``int_fast16_t``, ``int_fast32_t``, ``int_fast64_t``,
+  ``uint_fast8_t``, ``uint_fast16_t``, ``uint_fast32_t``,
+  ``uint_fast64_t``, ``intptr_t``, and ``uintptr_t`` typedefs,
+  respectively.  They exist to make the standard header files
+  :samp:`stddef.h`, :samp:`stdint.h`, and :samp:`wchar.h` work correctly.
+  You should not use these macros directly; instead, include the
+  appropriate headers and use the typedefs.  Some of these macros may
+  not be defined on particular systems if GCC does not provide a
+  :samp:`stdint.h` header on those systems.
+
+.. c:macro:: __CHAR_BIT__
+
+  Defined to the number of bits used in the representation of the
+  ``char`` data type.  It exists to make the standard header given
+  numerical limits work correctly.  You should not use
+  this macro directly; instead, include the appropriate headers.
+
+.. c:macro::[...]

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