1 # getopt.m4 serial 14 (modified version)
2 dnl Copyright (C) 2002-2006, 2008 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 # The getopt module assume you want GNU getopt, with getopt_long etc,
8 # rather than vanilla POSIX getopt. This means your code should
9 # always include <getopt.h> for the getopt prototypes.
11 AC_DEFUN([gl_GETOPT_SUBSTITUTE],
15 gl_GETOPT_SUBSTITUTE_HEADER
18 AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
21 AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
22 [Define to rpl_ if the getopt replacement functions and variables
27 AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
29 if test -z "$GETOPT_H"; then
30 AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
33 dnl BSD getopt_long uses a way to reset option processing, that is different
34 dnl from GNU and Solaris (which copied the GNU behavior). We support both
35 dnl GNU and BSD style resetting of getopt_long(), so there's no need to use
36 dnl GNU getopt_long() on BSD due to different resetting style.
38 dnl With getopt_long(), some BSD versions have a bug in handling optional
39 dnl arguments. This bug appears only if the environment variable
40 dnl POSIXLY_CORRECT has been set, so it shouldn't be too bad in most
41 dnl cases; probably most don't have that variable set. But if we actually
42 dnl hit this bug, it is a real problem due to our heavy use of optional
45 dnl According to CVS logs, the bug was introduced in OpenBSD in 2003-09-22
46 dnl and copied to FreeBSD in 2004-02-24. It was fixed in both in 2006-09-22,
47 dnl so the affected versions shouldn't be popular anymore anyway. NetBSD
48 dnl never had this bug. TODO: What about Darwin and others?
49 if test -z "$GETOPT_H"; then
50 AC_CHECK_DECL([optreset],
51 [AC_DEFINE([HAVE_OPTRESET], 1,
52 [Define to 1 if getopt.h declares extern int optreset.])],
53 [], [#include <getopt.h>])
56 dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
57 dnl option string (as of 2005-05-05). We don't use that feature, so this
58 dnl is not a problem for us. Thus, the respective test was removed here.
61 AC_DEFUN([gl_GETOPT_IFELSE],
63 AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
64 AS_IF([test -n "$GETOPT_H"], [$1], [$2])
67 AC_DEFUN([gl_GETOPT], [gl_GETOPT_IFELSE([gl_GETOPT_SUBSTITUTE])])