[Bug libgcc/78017] weak reference usage in gthr-posix.h (__gthread*) is broken

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78017

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There are other reasons why using static libraries does not make sense for
libpthread.