tests/test-year2038.c

   1 /* Test of year2038 module.
   2    Copyright (C) 2023-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2023.  */
  18
  19 /* This test fails if AC_SYS_YEAR2038 could not arrange for a time_t
  20    that supports values > 2147483647.
  21    This can happen
  22      - on systems that are not year 2038 safe, or
  23      - if the user specified --disable-year2038 at configure time.
  24    It is intended that this test fails in these circumstances.  */
  25
  26 #include <config.h>
  27
  28 #include <sys/types.h>
  29 #include "intprops.h"
  30
  31 /* Although this test could be done with static_assert, the test
  32    harness prefers dynamic checking.  */
  33
  34 int
  35 main (void)
  36 {
  37   /* Check the range of time_t.  */
  38   return TYPE_MAXIMUM (time_t) >> 31 == 0;
  39 }