2 dnl Copyright (C) 2002-2006, 2008-2009 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 # Request a POSIX compliant getopt function.
8 AC_DEFUN([gl_FUNC_GETOPT_POSIX],
10 m4_divert_text([DEFAULTS], [gl_getopt_required=POSIX])
11 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
18 # Request a POSIX compliant getopt function with GNU extensions (such as
19 # options with optional arguments) and the functions getopt_long,
21 AC_DEFUN([gl_FUNC_GETOPT_GNU],
23 m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])
25 AC_REQUIRE([gl_FUNC_GETOPT_POSIX])
28 # Request the gnulib implementation of the getopt functions unconditionally.
30 AC_DEFUN([gl_REPLACE_GETOPT],
32 dnl Arrange for getopt.h to be created.
33 gl_GETOPT_SUBSTITUTE_HEADER
34 dnl Arrange for unistd.h to include getopt.h.
35 GNULIB_UNISTD_H_GETOPT=1
36 dnl Arrange to compile the getopt implementation.
42 # emacs' configure.in uses this.
43 AC_DEFUN([gl_GETOPT_IFELSE],
45 AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
46 AS_IF([test -n "$gl_replace_getopt"], [$1], [$2])
49 # Determine whether to replace the entire getopt facility.
50 AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
52 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
54 dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
55 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
59 dnl Test whether <getopt.h> is available.
60 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
61 AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
64 dnl Test whether the function getopt_long is available.
65 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
66 AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
69 dnl BSD getopt_long uses an incompatible method to reset option processing,
70 dnl but the testsuite does not show a need to use this 'optreset' variable.
71 if false && test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
72 AC_CHECK_DECL([optreset], [gl_replace_getopt=yes], [],
73 [#include <getopt.h>])
76 dnl mingw's getopt (in libmingwex.a) does weird things when the options
77 dnl strings starts with '+' and it's not the first call. Some internal state
78 dnl is left over from earlier calls, and neither setting optind = 0 nor
79 dnl setting optreset = 1 get rid of this internal state.
80 if test -z "$gl_replace_getopt"; then
81 AC_CACHE_CHECK([whether getopt is POSIX compatible],
82 [gl_cv_func_getopt_posix],
84 dnl This test fails on mingw and succeeds on all other platforms.
90 /* The glibc implementation of getopt supports setting optind = 0 as a means
91 of clearing the internal state, but other implementations don't. */
106 argv[argc++] = "program";
108 argv[argc++] = "foo";
109 argv[argc++] = "bar";
113 c = getopt (argc, argv, "ab");
116 c = getopt (argc, argv, "ab");
122 /* Some internal state exists at this point. */
128 argv[argc++] = "program";
129 argv[argc++] = "donald";
131 argv[argc++] = "billy";
132 argv[argc++] = "duck";
134 argv[argc++] = "bar";
138 c = getopt (argc, argv, "+abp:q:");
141 if (!(strcmp (argv[0], "program") == 0))
143 if (!(strcmp (argv[1], "donald") == 0))
145 if (!(strcmp (argv[2], "-p") == 0))
147 if (!(strcmp (argv[3], "billy") == 0))
149 if (!(strcmp (argv[4], "duck") == 0))
151 if (!(strcmp (argv[5], "-a") == 0))
153 if (!(strcmp (argv[6], "bar") == 0))
162 [gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
164 mingw*) gl_cv_func_getopt_posix="guessing no";;
165 *) gl_cv_func_getopt_posix="guessing yes";;
169 case "$gl_cv_func_getopt_posix" in
170 *no) gl_replace_getopt=yes ;;
174 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
175 AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
177 [AC_LANG_PROGRAM([[#include <getopt.h>
179 #include <string.h>]],
181 /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
182 and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
183 OSF/1 5.1, Solaris 10. */
186 myargv[0] = "conftest";
190 if (getopt (2, myargv, "+a") != '?')
193 /* This code succeeds on glibc 2.8, mingw,
194 and fails on MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
195 IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin. */
197 char *argv[] = { "program", "-p", "foo", "bar" };
200 if (getopt (4, argv, "p::") != 'p')
204 if (getopt (4, argv, "p::") != -1)
211 [gl_cv_func_getopt_gnu=yes],
212 [gl_cv_func_getopt_gnu=no],
213 [dnl Cross compiling. Guess based on host and declarations.
215 *-gnu* | mingw*) gl_cv_func_getopt_gnu=no;;
216 *) gl_cv_func_getopt_gnu=yes;;
220 if test "$gl_cv_func_getopt_gnu" = "no"; then
221 gl_replace_getopt=yes
226 # emacs' configure.in uses this.
227 AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
230 AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
231 [Define to rpl_ if the getopt replacement functions and variables
236 # Prerequisites of lib/getopt*.
237 # emacs' configure.in uses this.
238 AC_DEFUN([gl_PREREQ_GETOPT],
240 AC_CHECK_DECLS_ONCE([getenv])