https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100748
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:80fe172ba9820199c2bbce5d0611ffca27823049 commit r12-5108-g80fe172ba9820199c2bbce5d0611ffca27823049 Author: Jonathan Wakely <jwak...@redhat.com> Date: Tue Nov 9 23:45:36 2021 +0000 libstdc++: Disable gthreads weak symbols for glibc 2.34 [PR103133] Since Glibc 2.34 all pthreads symbols are defined directly in libc not libpthread, and since Glibc 2.32 we have used __libc_single_threaded to avoid unnecessary locking in single-threaded programs. This means there is no reason to avoid linking to libpthread now, and so no reason to use weak symbols defined in gthr-posix.h for all the pthread_xxx functions. libstdc++-v3/ChangeLog: PR libstdc++/100748 PR libstdc++/103133 * config/os/gnu-linux/os_defines.h (_GLIBCXX_GTHREAD_USE_WEAK): Define for glibc 2.34 and later.
