1 files changed, 34 insertions, 0 deletions
diff --git a/m4/mktime.m4 b/m4/mktime.m4
new file mode 100644
index 000000000..3f03b1e0c
--- /dev/null
+++ b/m4/mktime.m4
@@ -0,0 +1,34 @@
+dnl From Jim Meyering.
+dnl FIXME: this should migrate into libit.
+
+AC_DEFUN(AM_FUNC_MKTIME,
+[AC_REQUIRE([AC_HEADER_TIME])dnl
+ AC_CHECK_HEADERS(sys/time.h)
+ AC_CACHE_CHECK([for working mktime], am_cv_func_working_mktime,
+  [AC_TRY_RUN([/* Test program from Tony Leneis (tony@plaza.ds.adp.com).  */
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+int
+main ()
+{
+  time_t today = time (0);
+  struct tm *local = localtime (&today);
+  exit (mktime (local) != today);
+}
+	      ],
+	     am_cv_func_working_mktime=yes, am_cv_func_working_mktime=no,
+	     dnl When crosscompiling, assume mktime is missing or broken.
+	     am_cv_func_working_mktime=no)
+  ])
+  if test $am_cv_func_working_mktime = no; then
+    LIBOBJS="$LIBOBJS mktime.o"
+  fi
+])