[3.10] gh-97897: Prevent os.mkfifo and os.mknod segfaults with macOS 13 SDK (GH-97944)#97967
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…3 SDK (pythonGH-97944) The macOS 13 SDK includes support for the `mkfifoat` and `mknodat` system calls. Using the `dir_fd` option with either `os.mkfifo` or `os.mknod` could result in a segfault if cpython is built with the macOS 13 SDK but run on an earlier version of macOS. Prevent this by adding runtime support for detection of these system calls ("weaklinking") as is done for other newer syscalls on macOS. (cherry picked from commit 6d0a019) Co-authored-by: Ned Deily <nad@python.org>
bedevere-bot added type-crash 
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The macOS 13 SDK includes support for the
mkfifoatandmknodatsystem calls.Using the
dir_fdoption with eitheros.mkfifooros.mknodcould result in asegfault if cpython is built with the macOS 13 SDK but run on an earlier
version of macOS. Prevent this by adding runtime support for detection of
these system calls ("weaklinking") as is done for other newer syscalls on
macOS.
(cherry picked from commit 6d0a019)
Co-authored-by: Ned Deily nad@python.org