* Puneet Kumar Yatnal via Gcc-bugs:
> What is next step here? How do I post this in Bugzilla and get
> support.
This issue has already been fixed with this commit:
commit 80fe172ba9820199c2bbce5d0611ffca27823049
Author: Jonathan Wakely <jwakely@xxxxxxxxxx>
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.
It's been backported to GCC 10, but not GCC 9. Backporting to 9
requires some messaging to get into 9 which lacks commit
b11cbbbb74b0e357652a1f1f0d93 ("libstdc++: Avoid calling undefined
__gthread_self weak symbol [PR 95989]").
Thanks,
Florian
