New optional ZONE arg for format-time-string etc.

[gnu-emacs] / m4 / timegm.m4

diff --git a/m4/timegm.m4 b/m4/timegm.m4
new file mode 100644 (file)
index 0000000..8e68b99
--- /dev/null
+++ b/m4/timegm.m4
@@ -0,0 +1,26 @@
+# timegm.m4 serial 11
+dnl Copyright (C) 2003, 2007, 2009-2015 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_TIMEGM],
+[
+  AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_MKTIME])
+  REPLACE_TIMEGM=0
+  AC_CHECK_FUNCS_ONCE([timegm])
+  if test $ac_cv_func_timegm = yes; then
+    if test $gl_cv_func_working_mktime = no; then
+      # Assume that timegm is buggy if mktime is.
+      REPLACE_TIMEGM=1
+    fi
+  else
+    HAVE_TIMEGM=0
+  fi
+])
+
+# Prerequisites of lib/timegm.c.
+AC_DEFUN([gl_PREREQ_TIMEGM], [
+  :
+])