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+/* Test of largefile module.
+ Copyright (C) 2023-2024 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
+
+/* This test may fail if AC_SYS_LARGEFILE could not arrange for a 64-bit off_t.
+ This should be rare, though: only very old systems don't have support for
+ files larger than 2 GiB. */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "intprops.h"
+
+/* Although these tests could be done with static_assert, the test
+ harness prefers dynamic checking. */
+
+int
+main (void)
+{
+ int result = 0;
+
+ /* Check the range of off_t.
+ With MSVC, this test succeeds only thanks to the 'sys_types' module. */
+ if (TYPE_MAXIMUM (off_t) >> 31 >> 31 == 0)
+ result |= 1;
+
+ /* Check the size of the 'struct stat' field 'st_size'.
+ With MSVC, this test succeeds only thanks to the 'sys_stat' module. */
+ {
+ struct stat st;
+ if (sizeof st.st_size != sizeof (off_t))
+ result |= 2;
+ }
+
+ return result;
+}