Reduce dependencies.

[gnulib.git] / m4 / getsubopt.m4

diff --git a/m4/getsubopt.m4 b/m4/getsubopt.m4
index 9b87e7c..8adf311 100644 (file)
--- a/m4/getsubopt.m4
+++ b/m4/getsubopt.m4
@@ -1,18 +1,19 @@
-# getsubopt.m4 serial 1
-dnl Copyright (C) 2004 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License.  As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# getsubopt.m4 serial 4
+dnl Copyright (C) 2004, 2007, 2009, 2010 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_GETSUBOPT],
 [
   dnl Persuade glibc <stdlib.h> to declare getsubopt().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
-  AC_REPLACE_FUNCS(getsubopt)
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([getsubopt])
   if test $ac_cv_func_getsubopt = no; then
+    HAVE_GETSUBOPT=0
+    AC_LIBOBJ([getsubopt])
     gl_PREREQ_GETSUBOPT
   fi
 ])