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9.75 sys/wait.h

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_wait.h.html

Gnulib module: sys_wait

Portability problems fixed by Gnulib:

• This header file is missing on some platforms: mingw, MSVC 14.

Portability problems not fixed by Gnulib:

• System status macros such as WEXITSTATUS require an lvalue argument on some platforms. macOS 11.1.