sys_types: Avoid autoconf warning about gl_SYS_TYPES_H.

[gnulib.git] / m4 / sys_types_h.m4

diff --git a/m4/sys_types_h.m4 b/m4/sys_types_h.m4
index 6132727..d15c1b3 100644 (file)
--- a/m4/sys_types_h.m4
+++ b/m4/sys_types_h.m4
@@ -1,10 +1,10 @@
-# sys_types_h.m4 serial 4
+# sys_types_h.m4 serial 5
 dnl Copyright (C) 2011-2013 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_SYS_TYPES_H],
+AC_DEFUN_ONCE([gl_SYS_TYPES_H],
 [
   AC_REQUIRE([gl_SYS_TYPES_H_DEFAULTS])
   gl_NEXT_HEADERS([sys/types.h])