[Bug libstdc++/108636] [10 Regression] C++20 undefined reference to `std::filesystem::__cxx11::path::_List::type(std::filesystem::__cxx11::path::_Type)' with -fkeep-inline-functions

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108636

--- Comment #11 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Jonathan Wakely
<r...@gcc.gnu.org>:

https://gcc.gnu.org/g:4b36925576d1097b20cddd29cf96c5b9ecfffc3d

commit r12-10127-g4b36925576d1097b20cddd29cf96c5b9ecfffc3d
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Thu Feb 1 18:37:34 2024 +0000

    libstdc++: Force-inline shared_ptr::operator bool() for C++20 [PR108636]

    This avoids a linker error with -fkeep-inline-functions when including
    <filesystem>. We can't backport the fix from trunk because it adds an
    export to the shared library. By marking the "missing" symbol
    always_inline for C++20 mode we don't need a definition in the library.

    libstdc++-v3/ChangeLog:

            PR libstdc++/108636
            * include/bits/shared_ptr_base.h (__shared_ptr::operator bool):
            Add always_inline attribute for C++20 and later.