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])
57 gl_CHECK_NEXT_HEADERS([getopt.h])
58 AC_CHECK_HEADERS_ONCE([getopt.h])
59 if test $ac_cv_header_getopt_h = yes; then
64 AC_SUBST([HAVE_GETOPT_H])
68 dnl Test whether <getopt.h> is available.
69 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
70 AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
73 dnl Test whether the function getopt_long is available.
74 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
75 AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
78 dnl BSD getopt_long uses an incompatible method to reset option processing,
79 dnl but the testsuite does not show a need to use this 'optreset' variable.
80 if false && test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
81 AC_CHECK_DECL([optreset], [gl_replace_getopt=yes], [],
82 [#include <getopt.h>])
85 dnl mingw's getopt (in libmingwex.a) does weird things when the options
86 dnl strings starts with '+' and it's not the first call. Some internal state
87 dnl is left over from earlier calls, and neither setting optind = 0 nor
88 dnl setting optreset = 1 get rid of this internal state.
89 if test -z "$gl_replace_getopt"; then
90 AC_CACHE_CHECK([whether getopt is POSIX compatible],
91 [gl_cv_func_getopt_posix],
93 dnl This test fails on mingw and succeeds on all other platforms.
94 AC_RUN_IFELSE([AC_LANG_SOURCE([[
99 /* The glibc implementation of getopt supports setting optind = 0 as a means
100 of clearing the internal state, but other implementations don't. */
102 # define OPTIND_MIN 0
104 # define OPTIND_MIN 1
115 argv[argc++] = "program";
117 argv[argc++] = "foo";
118 argv[argc++] = "bar";
122 c = getopt (argc, argv, "ab");
125 c = getopt (argc, argv, "ab");
131 /* Some internal state exists at this point. */
137 argv[argc++] = "program";
138 argv[argc++] = "donald";
140 argv[argc++] = "billy";
141 argv[argc++] = "duck";
143 argv[argc++] = "bar";
147 c = getopt (argc, argv, "+abp:q:");
150 if (!(strcmp (argv[0], "program") == 0))
152 if (!(strcmp (argv[1], "donald") == 0))
154 if (!(strcmp (argv[2], "-p") == 0))
156 if (!(strcmp (argv[3], "billy") == 0))
158 if (!(strcmp (argv[4], "duck") == 0))
160 if (!(strcmp (argv[5], "-a") == 0))
162 if (!(strcmp (argv[6], "bar") == 0))
171 [gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
173 mingw*) gl_cv_func_getopt_posix="guessing no";;
174 *) gl_cv_func_getopt_posix="guessing yes";;
178 case "$gl_cv_func_getopt_posix" in
179 *no) gl_replace_getopt=yes ;;
183 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
184 AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
186 [AC_LANG_PROGRAM([[#include <getopt.h>
188 #include <string.h>]],
190 /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
191 and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
192 OSF/1 5.1, Solaris 10. */
195 myargv[0] = "conftest";
199 if (getopt (2, myargv, "+a") != '?')
202 /* This code succeeds on glibc 2.8, mingw,
203 and fails on MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
204 IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin. */
206 char *argv[] = { "program", "-p", "foo", "bar" };
209 if (getopt (4, argv, "p::") != 'p')
213 if (getopt (4, argv, "p::") != -1)
220 [gl_cv_func_getopt_gnu=yes],
221 [gl_cv_func_getopt_gnu=no],
222 [dnl Cross compiling. Guess based on host and declarations.
224 *-gnu* | mingw*) gl_cv_func_getopt_gnu=no;;
225 *) gl_cv_func_getopt_gnu=yes;;
229 if test "$gl_cv_func_getopt_gnu" = "no"; then
230 gl_replace_getopt=yes
235 # emacs' configure.in uses this.
236 AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
239 AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
240 [Define to rpl_ if the getopt replacement functions and variables
245 # Prerequisites of lib/getopt*.
246 # emacs' configure.in uses this.
247 AC_DEFUN([gl_PREREQ_GETOPT],
249 AC_CHECK_DECLS_ONCE([getenv])