2 @section @code{sigtimedwait}
5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigtimedwait.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 This function is missing on some platforms:
17 Mac OS X 10.13, OpenBSD 6.7, Minix 3.1.8, Cygwin 2.9, mingw, MSVC 14, Android 5.1.
19 Linux implements the meaning of NULL timeout by doing what @code{sigwaitinfo}
20 does; other platforms may not do the same.