(gl_GETDATE): Remove AC_FUNC_ALLOCA.

[gnulib.git] / m4 / getopt.m4

diff --git a/m4/getopt.m4 b/m4/getopt.m4
index df602b9..dcd333b 100644 (file)
--- a/m4/getopt.m4
+++ b/m4/getopt.m4
@@ -1,13 +1,44 @@
-# getopt.m4 serial 2
-dnl Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+# getopt.m4 serial 6
+dnl Copyright (C) 2002, 2003, 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.
 
+# The getopt module assume you want GNU getopt, with getopt_long etc,
+# rather than vanilla POSIX getopt.  This means your your code should
+# always include <getopt.h> for the getopt prototypes.
+
+AC_DEFUN([gl_GETOPT_SUBSTITUTE],
+[
+  GETOPT_H=getopt.h
+  AC_LIBOBJ([getopt])
+  AC_LIBOBJ([getopt1])
+  AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
+    [Define to rpl_ if the getopt replacement functions and variables
+     should be used.])
+  AC_SUBST([GETOPT_H])
+])
+
 AC_DEFUN([gl_GETOPT],
 [
-  dnl Prerequisites of lib/getopt.c.
-  :
+  gl_PREREQ_GETOPT
+
+  if test -z "$GETOPT_H"; then
+    GETOPT_H=
+    AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
+    AC_CHECK_FUNCS([getopt_long_only], [], [GETOPT_H=getopt.h])
+
+    dnl BSD getopt_long uses an incompatible method to reset option processing,
+    dnl and (as of 2004-10-15) mishandles optional option-arguments.
+    AC_CHECK_DECL([optreset], [GETOPT_H=getopt.h], [], [#include <getopt.h>])
+
+    if test -n "$GETOPT_H"; then
+      gl_GETOPT_SUBSTITUTE
+    fi
+  fi
 ])
+
+# Prerequisites of lib/getopt*.
+AC_DEFUN([gl_PREREQ_GETOPT], [:])