1# getopt.m4 serial 12
2dnl Copyright (C) 2002, 2003, 2004, 2005, 2006 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 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  gl_PREREQ_GETOPT
17])
18
19AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
20[
21  GETOPT_H=getopt.h
22  AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
23    [Define to rpl_ if the getopt replacement functions and variables
24     should be used.])
25  AC_SUBST([GETOPT_H])
26])
27
28AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
29[
30  if test -z "$GETOPT_H"; then
31    AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
32  fi
33
34  if test -z "$GETOPT_H"; then
35    AC_CHECK_FUNCS([getopt_long_only], [], [GETOPT_H=getopt.h])
36  fi
37
38  dnl BSD getopt_long uses an incompatible method to reset option processing,
39  dnl and (as of 2004-10-15) mishandles optional option-arguments.
40  if test -z "$GETOPT_H"; then
41    AC_CHECK_DECL([optreset], [GETOPT_H=getopt.h], [], [#include <getopt.h>])
42  fi
43
44  dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
45  dnl option string (as of 2005-05-05).
46  if test -z "$GETOPT_H"; then
47    AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_gnu_getopt],
48      [AC_RUN_IFELSE(
49	[AC_LANG_PROGRAM([#include <getopt.h>],
50	   [[
51	     char *myargv[3];
52	     myargv[0] = "conftest";
53	     myargv[1] = "-+";
54	     myargv[2] = 0;
55	     return getopt (2, myargv, "+a") != '?';
56	   ]])],
57	[gl_cv_func_gnu_getopt=yes],
58	[gl_cv_func_gnu_getopt=no],
59	[dnl cross compiling - pessimistically guess based on decls
60	 dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
61	 dnl option string (as of 2005-05-05).
62	 AC_CHECK_DECL([getopt_clip],
63	   [gl_cv_func_gnu_getopt=no], [gl_cv_func_gnu_getopt=yes],
64	   [#include <getopt.h>])])])
65    if test "$gl_cv_func_gnu_getopt" = "no"; then
66      GETOPT_H=getopt.h
67    fi
68  fi
69])
70
71AC_DEFUN([gl_GETOPT_IFELSE],
72[
73  AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
74  AS_IF([test -n "$GETOPT_H"], [$1], [$2])
75])
76
77AC_DEFUN([gl_GETOPT], [gl_GETOPT_IFELSE([gl_GETOPT_SUBSTITUTE])])
78
79# Prerequisites of lib/getopt*.
80AC_DEFUN([gl_PREREQ_GETOPT],
81[
82  AC_CHECK_DECLS_ONCE([getenv])
83])
84