5 POSIX specification: @url{http://www.opengroup.org/susv3xsh/usleep.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 This function is missing on some platforms:
17 IRIX 5.3, Solaris 2.4, older mingw, BeOS.
19 According to POSIX, the @code{usleep} function may interfere with the program's
20 use of the @code{SIGALRM} signal. On Linux, it doesn't; on other platforms,
23 On some systems, @code{usleep} rejects attempts to sleep longer than 1
24 second, as allowed by POSIX: