Renamed from utimes.m4.

diff --git a/m4/utimes-null.m4 b/m4/utimes-null.m4
new file mode 100644 (file)
index 0000000..f7e7842
--- /dev/null
+++ b/m4/utimes-null.m4
@@ -0,0 +1,32 @@
+#serial 4
+
+dnl Shamelessly cloned from acspecific.m4's AC_FUNC_UTIME_NULL,
+dnl then do case-insensitive s/utime/utimes/.
+
+AC_DEFUN([jm_FUNC_UTIMES_NULL],
+[AC_CACHE_CHECK(whether utimes accepts a null argument, ac_cv_func_utimes_null,
+[rm -f conftest.data; > conftest.data
+AC_TRY_RUN([
+/* In case stat has been defined to rpl_stat, undef it here.  */
+#undef stat
+#include <sys/types.h>
+#include <sys/stat.h>
+main() {
+struct stat s, t;
+exit(!(stat ("conftest.data", &s) == 0
+       && utimes("conftest.data", (long *)0) == 0
+       && stat("conftest.data", &t) == 0
+       && t.st_mtime >= s.st_mtime
+       && t.st_mtime - s.st_mtime < 120));
+}],
+  ac_cv_func_utimes_null=yes,
+  ac_cv_func_utimes_null=no,
+  ac_cv_func_utimes_null=no)
+rm -f core core.* *.core])
+
+    if test $ac_cv_func_utimes_null = yes; then
+      AC_DEFINE(HAVE_UTIMES_NULL, 1,
+               [Define if utimes accepts a null argument])
+    fi
+  ]
+)