SPDX-FileCopyrightText: 2021 Melg Eight <public.melg8@gmail.com>

SPDX-License-Identifier: GPL-3.0-or-later

Replace test for support of correct values produced by nanosleep.
We always assume that kernel doesn't have correct implementation and
instead use function from gnulib with fix. That fixes reproducibility
problem across different kernels.

--- ../gnulib-d279bc/m4/nanosleep.m4
+++ ../gnulib-d279bc/m4/nanosleep.m4
@@ -85,23 +85,9 @@ AC_DEFUN([gl_FUNC_NANOSLEEP],
             ts_sleep.tv_nsec = 1;
             #if HAVE_DECL_ALARM
             {
-              static struct sigaction act;
-              act.sa_handler = check_for_SIGALRM;
-              sigemptyset (&act.sa_mask);
-              sigaction (SIGALRM, &act, NULL);
-              alarm (1);
-              if (nanosleep (&ts_sleep, NULL) != 0)
-                return 3;
-              /* Test for a minor problem: the handling of large arguments.  */
-              ts_sleep.tv_sec = TYPE_MAXIMUM (time_t);
-              ts_sleep.tv_nsec = 999999999;
-              alarm (1);
-              if (nanosleep (&ts_sleep, &ts_remaining) != -1)
-                return 4;
-              if (errno != EINTR)
-                return 5;
-              if (ts_remaining.tv_sec <= TYPE_MAXIMUM (time_t) - 10)
-                return 6;
+              /* Force to use HAVE_BUG_BIG_NANOSLEEP 1 across kernels even
+                 if it correctly handles big nanosleeps. */
+              return 6;
             }
             #else /* A simpler test for native Windows.  */
             if (nanosleep (&ts_sleep, &ts_remaining) < 0)