[Bug libstdc++/100164] [11/12 Regression] semaphore_impl not declared on AIX

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100164

--- Comment #16 from Thomas Rodgers <rodgertq at gcc dot gnu.org> ---
The _M_try_acquire() change should be on master and gcc-11 now.