[Bug libstdc++/110854] constructor of std::counting_semaphore is not constexpr

[de34 at live dot cn via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110854

Jiang An <de34 at live dot cn> changed:

           What    |Removed                     |Added
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                 CC|                            |de34 at live dot cn

--- Comment #2 from Jiang An <de34 at live dot cn> ---
The constructor of the internal __platform_semaphore class currently calls
sem_init, which make it incompatible with constexpr...