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Subject: [Bug c++/98531] [11 Regression] g++.dg/modules/xtreme-header-2_a.H
 etc. FAIL
Date: Mon, 08 Feb 2021 17:24:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98531

--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Nathan Sidwell <nathan@gcc.gnu.org>:

https://gcc.gnu.org/g:57b17858a1b3719507ccad926fb57b05f26935f8

commit r11-7138-g57b17858a1b3719507ccad926fb57b05f26935f8
Author: Nathan Sidwell <nathan@acm.org>
Date:   Fri Jan 22 08:48:27 2021 -0800

    c++: cross-module __cxa_atexit use [PR 98531]

    The compiler's use of lazily-declared library functions must insert
    said functions into a symbol table, so that they can be correctly
    merged across TUs at the module-level.  We have too many different
    ways of declaring such library functions.  This fixes __cxa_atexit (or
    its system-specific variations), pushing (or merging) the decl into
    the appropriate namespace.  Because we're pushing a lazy builtin,
    check_redeclaration_exception_specification needed a tweak to allow a
    such a builtin's eh spec to differ from what the user may have already
    declared. (I suspect no all headers declare atexit as noexcept.)

    We can't test the -fno-use-cxa-atexit path with modules, as that
    requires a followup patch to a closely related piece (which also
    affects cxa_atexit targets in other circumstances).

            PR c++/98531
            gcc/cp/
            * cp-tree.h (push_abi_namespace, pop_abi_namespace): Declare.
            * decl.c (push_abi_namespace, pop_abi_namespace): Moved
            from rtti.c, add default namespace arg.
            (check_redeclaration_exception_specification): Allow a lazy
            builtin's eh spec to differ from an lready-declared user
            declaration.
            (declare_global_var): Use push/pop_abi_namespace.
            (get_atexit_node): Push the fndecl into a namespace.
            * rtti.c (push_abi_namespace, pop_abi_namespace): Moved to
            decl.c.
            gcc/testsuite/
            * g++.dg/modules/pr98531-1.h: New.
            * g++.dg/modules/pr98531-1_a.H: New.
            * g++.dg/modules/pr98531-1_b.C: New.
            * g++.dg/abi/pr98531-1.C: New.
            * g++.dg/abi/pr98531-2.C: New.
            * g++.dg/abi/pr98531-3.C: New.
            * g++.dg/abi/pr98531-4.C: New.=