`patch-sem-clockwait-weak-3.15.patch`[https://github.com/astral-sh/python-build-standalone/blob/main/cpython-unix/patch-sem-clockwait-weak-3.15.patch] Added in #895 to make the availability of `sem_clockwait` a run time detection rather than build time.
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emmatyping commentedon Oct 20, 2026
glibc notes this is not available on a number of posix platforms, so I think on the surface this seems reasonable.
https://www.gnu.org/software/gnulib/manual/html_node/sem_005fclockwait.html