- int
- main ()
- {
- struct timespec ts_sleep, ts_remaining;
- ts_sleep.tv_sec = 0;
- ts_sleep.tv_nsec = 1;
- exit (nanosleep (&ts_sleep, &ts_remaining) == 0 ? 0 : 1);
- }
- ],
- jm_cv_func_nanosleep_works=yes,
- jm_cv_func_nanosleep_works=no,
- dnl When crosscompiling, assume the worst.
- jm_cv_func_nanosleep_works=no)
+ static void
+ check_for_SIGALRM (int sig)
+ {
+ if (sig != SIGALRM)
+ _exit (1);
+ }
+
+ int
+ main ()
+ {
+ static struct timespec ts_sleep;
+ static struct timespec ts_remaining;
+ static struct sigaction act;
+ if (! nanosleep)
+ return 1;
+ act.sa_handler = check_for_SIGALRM;
+ sigemptyset (&act.sa_mask);
+ sigaction (SIGALRM, &act, NULL);
+ ts_sleep.tv_sec = 0;
+ ts_sleep.tv_nsec = 1;
+ alarm (1);
+ if (nanosleep (&ts_sleep, NULL) != 0)
+ return 1;
+ ts_sleep.tv_sec = TYPE_MAXIMUM (time_t);
+ ts_sleep.tv_nsec = 999999999;
+ alarm (1);
+ if (nanosleep (&ts_sleep, &ts_remaining) == -1 && errno == EINTR
+ && TYPE_MAXIMUM (time_t) - 10 < ts_remaining.tv_sec)
+ return 0;
+ return 119;
+ }]])],
+ [gl_cv_func_nanosleep=yes],
+ [case $? in dnl (
+ 119) gl_cv_func_nanosleep='no (mishandles large arguments)';; dnl (
+ *) gl_cv_func_nanosleep=no;;
+ esac],
+ [gl_cv_func_nanosleep=cross-compiling])