+ else
+ dnl Cygwin 1.5.x has a bug where sleep can't exceed 49.7 days.
+ AC_CACHE_CHECK([for working sleep], [gl_cv_func_sleep_works],
+ [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+static void
+handle_alarm (int sig)
+{
+ if (sig != SIGALRM)
+ _exit (2);
+}
+]], [[
+ /* Failure to compile this test due to missing alarm is okay,
+ since all such platforms (mingw) also lack sleep. */
+ unsigned int pentecost = 50 * 24 * 60 * 60; /* 50 days. */
+ unsigned int remaining;
+ signal (SIGALRM, handle_alarm);
+ alarm (1);
+ remaining = sleep (pentecost);
+ return !(pentecost - 10 < remaining && remaining <= pentecost);]])],
+ [gl_cv_func_sleep_works=yes], [gl_cv_func_sleep_works=no],
+ [gl_cv_func_sleep_works="guessing no"])])
+ if test "$gl_cv_func_sleep_works" != yes; then
+ REPLACE_SLEEP=1
+ AC_LIBOBJ([sleep])
+ fi