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Subject: [Bug libstdc++/103626] _GLIBCXX_HOSTED should respect -ffreestanding
Date: Mon, 03 Oct 2022 14:45:32 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103626

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:f1b51f68f8ac6c63e352dda8599aed01634212de

commit r13-3034-gf1b51f68f8ac6c63e352dda8599aed01634212de
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Sep 20 11:57:28 2022 +0100

    libstdc++: Make _GLIBCXX_HOSTED respect -ffreestanding [PR103626]

    This allows the library to switch to freestanding mode when compiling
    with the -ffreestanding flag. This means you don't need a separate
    libstdc++ build configured with --disable-hosted-libstdcxx in order to
    compile for a freestanding environment.

    The testsuite support files cannot be compiled for freestanding, so add
    -fno-freestanding to override any -ffreestanding in the test flags.

    libstdc++-v3/ChangeLog:

            PR libstdc++/103626
            * acinclude.m4 (GLIBCXX_ENABLE_HOSTED): Define _GLIBCXX_HOSTED
            to __STDC_HOSTED__ for non-freestanding installations.
            * configure: Regenerate.
            * include/Makefile.am (${host_builddir}/c++config.h): Adjust
            grep pattern.
            * include/Makefile.in: Regenerate.
            * testsuite/lib/libstdc++.exp (v3-build_support): Use
            -fno-freestanding.
            * testsuite/libstdc++-abi/abi.exp: Likewise.=