[Bug libstdc++/94069] [9 Regression] <shared_mutex> doesn't compile unless PTHREAD_RWLOCK_INITIALIZER is defined

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94069

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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   Target Milestone|---                         |9.3