1# getopt.m4 serial 14 (modified version)
2dnl Copyright (C) 2002-2006, 2008 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
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.
10
11AC_DEFUN([gl_GETOPT_SUBSTITUTE],
12[
13  AC_LIBOBJ([getopt])
14  AC_LIBOBJ([getopt1])
15  gl_GETOPT_SUBSTITUTE_HEADER
16])
17
18AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
19[
20  GETOPT_H=getopt.h
21  AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
22    [Define to rpl_ if the getopt replacement functions and variables
23     should be used.])
24  AC_SUBST([GETOPT_H])
25])
26
27AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
28[
29  if test -z "$GETOPT_H"; then
30    AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
31  fi
32
33  if test -z "$GETOPT_H"; then
34    AC_CHECK_FUNCS([getopt_long], [], [GETOPT_H=getopt.h])
35  fi
36
37  dnl BSD getopt_long uses a way to reset option processing, that is different
38  dnl from GNU and Solaris (which copied the GNU behavior). We support both
39  dnl GNU and BSD style resetting of getopt_long(), so there's no need to use
40  dnl GNU getopt_long() on BSD due to different resetting style.
41  dnl
42  dnl With getopt_long(), some BSD versions have a bug in handling optional
43  dnl arguments. This bug appears only if the environment variable
44  dnl POSIXLY_CORRECT has been set, so it shouldn't be too bad in most
45  dnl cases; probably most don't have that variable set. But if we actually
46  dnl hit this bug, it is a real problem due to our heavy use of optional
47  dnl arguments.
48  dnl
49  dnl According to CVS logs, the bug was introduced in OpenBSD in 2003-09-22
50  dnl and copied to FreeBSD in 2004-02-24. It was fixed in both in 2006-09-22,
51  dnl so the affected versions shouldn't be popular anymore anyway. NetBSD
52  dnl never had this bug. TODO: What about Darwin and others?
53  if test -z "$GETOPT_H"; then
54    AC_CHECK_DECL([optreset],
55      [AC_DEFINE([HAVE_OPTRESET], 1,
56        [Define to 1 if getopt.h declares extern int optreset.])],
57      [], [#include <getopt.h>])
58  fi
59
60  dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
61  dnl option string (as of 2005-05-05). We don't use that feature, so this
62  dnl is not a problem for us. Thus, the respective test was removed here.
63])
64
65AC_DEFUN([gl_GETOPT_IFELSE],
66[
67  AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
68  AS_IF([test -n "$GETOPT_H"], [$1], [$2])
69])
70
71AC_DEFUN([gl_GETOPT], [gl_GETOPT_IFELSE([gl_GETOPT_SUBSTITUTE])])
72