5 POSIX specification: @url{http://www.opengroup.org/susv3xsh/usleep.html}
9 Portability problems fixed by Gnulib:
12 On some systems, @code{usleep} rejects attempts to sleep longer than 1
13 second, as allowed by POSIX:
16 This function is missing on some platforms. However, the replacement
17 is designed to be lightweight, and may round to the neareset second;
18 use @code{select} or @code{nanosleep} if better resolution is needed:
19 IRIX 5.3, Solaris 2.4, older mingw, BeOS.
22 Portability problems not fixed by Gnulib:
25 According to POSIX, the @code{usleep} function may interfere with the program's
26 use of the @code{SIGALRM} signal. On Linux, it doesn't; on other platforms,