https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108636
--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:d640e435f156d8f825bf95c2164053b4a3a7b682 commit r10-11253-gd640e435f156d8f825bf95c2164053b4a3a7b682 Author: Jonathan Wakely <jwak...@redhat.com> Date: Thu Feb 2 14:06:40 2023 +0000 libstdc++: Fix std::filesystem errors with -fkeep-inline-functions [PR108636] With -fkeep-inline-functions there are linker errors when including <filesystem>. This happens because there are some filesystem::path constructors defined inline which call non-exported functions defined in the library. That's usually not a problem, because those constructors are only called by code that's also inside the library. But when the header is compiled with -fkeep-inline-functions those inline functions are emitted even though they aren't called. That then creates an undefined reference to the other library internals. The fix is to just move the private constructors into the library where they are called. That way they are never even seen by users, and so not compiled even if -fkeep-inline-functions is used. libstdc++-v3/ChangeLog: PR libstdc++/108636 * include/bits/fs_path.h (path::path(string_view, _Type)) (path::_Cmpt::_Cmpt(string_view, _Type, size_t)): Move inline definitions to ... * src/c++17/fs_path.cc: ... here. * testsuite/27_io/filesystem/path/108636.cc: New test. (cherry picked from commit db8d6fc572ec316ccfcf70b1dffe3be0b1b37212)
