AC_DEFUN([gl_FUNC_NANOSLEEP],
[
AC_LIBSOURCES([nanosleep.c])
nanosleep_save_libs=$LIBS
AC_SEARCH_LIBS([nanosleep], [rt posix4],
[test "$ac_cv_search_nanosleep" = "none required" ||
LIB_NANOSLEEP=$ac_cv_search_nanosleep])
AC_SUBST([LIB_NANOSLEEP])
AC_CACHE_CHECK([whether nanosleep works],
jm_cv_func_nanosleep_works,
[
AC_REQUIRE([AC_HEADER_TIME])
AC_CHECK_HEADERS_ONCE(sys/time.h)
AC_TRY_RUN([
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,
jm_cv_func_nanosleep_works=no)
])
if test $jm_cv_func_nanosleep_works = no; then
AC_LIBOBJ(nanosleep)
AC_DEFINE(nanosleep, rpl_nanosleep,
[Define to rpl_nanosleep if the replacement function should be used.])
gl_PREREQ_NANOSLEEP
fi
LIBS=$nanosleep_save_libs
])
AC_DEFUN([gl_PREREQ_NANOSLEEP],
[
AC_CHECK_HEADERS_ONCE(unistd.h)
AC_CHECK_FUNCS_ONCE(siginterrupt)
])