1 # getopt.m4 serial 28
2 dnl Copyright (C) 2002-2006, 2008-2010 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],
9 [
10 m4_divert_text([DEFAULTS], [gl_getopt_required=POSIX])
11 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
12 gl_GETOPT_IFELSE([
13 gl_REPLACE_GETOPT
14 ],
15 [])
16 ])
18 # Request a POSIX compliant getopt function with GNU extensions (such as
19 # options with optional arguments) and the functions getopt_long,
20 # getopt_long_only.
21 AC_DEFUN([gl_FUNC_GETOPT_GNU],
22 [
23 m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])
25 AC_REQUIRE([gl_FUNC_GETOPT_POSIX])
26 ])
28 # Request the gnulib implementation of the getopt functions unconditionally.
29 # argp.m4 uses this.
30 AC_DEFUN([gl_REPLACE_GETOPT],
31 [
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.
37 AC_LIBOBJ([getopt])
38 AC_LIBOBJ([getopt1])
39 gl_PREREQ_GETOPT
40 ])
42 # emacs' configure.in uses this.
43 AC_DEFUN([gl_GETOPT_IFELSE],
44 [
45 AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
46 AS_IF([test -n "$gl_replace_getopt"], [$1], [$2])
47 ])
49 # Determine whether to replace the entire getopt facility.
50 AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
51 [
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 $ac_cv_header_getopt_h = yes; then
60 HAVE_GETOPT_H=1
61 else
62 HAVE_GETOPT_H=0
63 fi
64 AC_SUBST([HAVE_GETOPT_H])
66 gl_replace_getopt=
68 dnl Test whether <getopt.h> is available.
69 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
70 AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
71 fi
73 dnl Test whether the function getopt_long is available.
74 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
75 AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
76 fi
78 dnl BSD getopt_long uses an incompatible method to reset option processing.
79 dnl Existence of the variable, in and of itself, is not a reason to replace
80 dnl getopt, but knowledge of the variable is needed to determine how to
81 dnl reset and whether a reset reparses the environment.
82 dnl Solaris supports neither optreset nor optind=0, but keeps no state that
83 dnl needs a reset beyond setting optind=1; detect Solaris by getopt_clip.
84 if test -z "$gl_replace_getopt"; then
85 AC_CHECK_DECLS([optreset], [],
86 [AC_CHECK_DECLS([getopt_clip], [], [],
87 [[#include <getopt.h>]])
88 ],
89 [[#include <getopt.h>]])
90 fi
92 dnl mingw's getopt (in libmingwex.a) does weird things when the options
93 dnl strings starts with '+' and it's not the first call. Some internal state
94 dnl is left over from earlier calls, and neither setting optind = 0 nor
95 dnl setting optreset = 1 get rid of this internal state.
96 dnl POSIX is silent on optind vs. optreset, so we allow either behavior.
97 dnl POSIX 2008 does not specify leading '+' behavior, but see
98 dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
99 dnl the next version of POSIX. For now, we only guarantee leading '+'
100 dnl behavior with getopt-gnu.
101 if test -z "$gl_replace_getopt"; then
102 AC_CACHE_CHECK([whether getopt is POSIX compatible],
103 [gl_cv_func_getopt_posix],
104 [
105 dnl This test fails on mingw and succeeds on all other platforms.
106 AC_RUN_IFELSE([AC_LANG_SOURCE([[
107 #include <unistd.h>
108 #include <stdlib.h>
109 #include <string.h>
111 #if !HAVE_DECL_OPTRESET && !HAVE_DECL_GETOPT_CLIP
112 # define OPTIND_MIN 0
113 #else
114 # define OPTIND_MIN 1
115 #endif
117 int
118 main ()
119 {
120 {
121 int argc = 0;
122 char *argv[10];
123 int c;
125 argv[argc++] = "program";
126 argv[argc++] = "-a";
127 argv[argc++] = "foo";
128 argv[argc++] = "bar";
129 argv[argc] = NULL;
130 optind = OPTIND_MIN;
131 opterr = 0;
133 c = getopt (argc, argv, "ab");
134 if (!(c == 'a'))
135 return 1;
136 c = getopt (argc, argv, "ab");
137 if (!(c == -1))
138 return 2;
139 if (!(optind == 2))
140 return 3;
141 }
142 /* Some internal state exists at this point. */
143 {
144 int argc = 0;
145 char *argv[10];
146 int c;
148 argv[argc++] = "program";
149 argv[argc++] = "donald";
150 argv[argc++] = "-p";
151 argv[argc++] = "billy";
152 argv[argc++] = "duck";
153 argv[argc++] = "-a";
154 argv[argc++] = "bar";
155 argv[argc] = NULL;
156 optind = OPTIND_MIN;
157 opterr = 0;
159 c = getopt (argc, argv, "+abp:q:");
160 if (!(c == -1))
161 return 4;
162 if (!(strcmp (argv[0], "program") == 0))
163 return 5;
164 if (!(strcmp (argv[1], "donald") == 0))
165 return 6;
166 if (!(strcmp (argv[2], "-p") == 0))
167 return 7;
168 if (!(strcmp (argv[3], "billy") == 0))
169 return 8;
170 if (!(strcmp (argv[4], "duck") == 0))
171 return 9;
172 if (!(strcmp (argv[5], "-a") == 0))
173 return 10;
174 if (!(strcmp (argv[6], "bar") == 0))
175 return 11;
176 if (!(optind == 1))
177 return 12;
178 }
179 /* Detect MacOS 10.5 bug. */
180 {
181 char *argv[3] = { "program", "-ab", NULL };
182 optind = OPTIND_MIN;
183 opterr = 0;
184 if (getopt (2, argv, "ab:") != 'a')
185 return 13;
186 if (getopt (2, argv, "ab:") != '?')
187 return 14;
188 if (optopt != 'b')
189 return 15;
190 if (optind != 2)
191 return 16;
192 }
194 return 0;
195 }
196 ]])],
197 [gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
198 [case "$host_os" in
199 mingw*) gl_cv_func_getopt_posix="guessing no";;
200 darwin*) gl_cv_func_getopt_posix="guessing no";;
201 *) gl_cv_func_getopt_posix="guessing yes";;
202 esac
203 ])
204 ])
205 case "$gl_cv_func_getopt_posix" in
206 *no) gl_replace_getopt=yes ;;
207 esac
208 fi
210 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
211 AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
212 [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
213 # optstring is necessary for programs like m4 that have POSIX-mandated
214 # semantics for supporting options interspersed with files.
215 # Also, since getopt_long is a GNU extension, we require optind=0.
216 gl_had_POSIXLY_CORRECT=${POSIXLY_CORRECT:+yes}
217 POSIXLY_CORRECT=1
218 export POSIXLY_CORRECT
219 AC_RUN_IFELSE(
220 [AC_LANG_PROGRAM([[#include <getopt.h>
221 #include <stddef.h>
222 #include <string.h>
223 ]], [[
224 /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
225 and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
226 OSF/1 5.1, Solaris 10. */
227 {
228 char *myargv[3];
229 myargv[0] = "conftest";
230 myargv[1] = "-+";
231 myargv[2] = 0;
232 opterr = 0;
233 if (getopt (2, myargv, "+a") != '?')
234 return 1;
235 }
236 /* This code succeeds on glibc 2.8, mingw,
237 and fails on MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
238 IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x. */
239 {
240 char *argv[] = { "program", "-p", "foo", "bar", NULL };
242 optind = 1;
243 if (getopt (4, argv, "p::") != 'p')
244 return 2;
245 if (optarg != NULL)
246 return 3;
247 if (getopt (4, argv, "p::") != -1)
248 return 4;
249 if (optind != 2)
250 return 5;
251 }
252 /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0. */
253 {
254 char *argv[] = { "program", "foo", "-p", NULL };
255 optind = 0;
256 if (getopt (3, argv, "-p") != 1)
257 return 6;
258 if (getopt (3, argv, "-p") != 'p')
259 return 7;
260 }
261 /* This code fails on glibc 2.11. */
262 {
263 char *argv[] = { "program", "-b", "-a", NULL };
264 optind = opterr = 0;
265 if (getopt (3, argv, "+:a:b") != 'b')
266 return 8;
267 if (getopt (3, argv, "+:a:b") != ':')
268 return 9;
269 }
270 return 0;
271 ]])],
272 [gl_cv_func_getopt_gnu=yes],
273 [gl_cv_func_getopt_gnu=no],
274 [dnl Cross compiling. Guess based on host and declarations.
275 case $host_os:$ac_cv_have_decl_optreset in
276 *-gnu*:* | mingw*:*) gl_cv_func_getopt_gnu=no;;
277 *:yes) gl_cv_func_getopt_gnu=no;;
278 *) gl_cv_func_getopt_gnu=yes;;
279 esac
280 ])
281 if test "$gl_had_POSIXLY_CORRECT" != yes; then
282 AS_UNSET([POSIXLY_CORRECT])
283 fi
284 ])
285 if test "$gl_cv_func_getopt_gnu" = "no"; then
286 gl_replace_getopt=yes
287 fi
288 fi
289 ])
291 # emacs' configure.in uses this.
292 AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
293 [
294 GETOPT_H=getopt.h
295 AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
296 [Define to rpl_ if the getopt replacement functions and variables
297 should be used.])
298 AC_SUBST([GETOPT_H])
299 ])
301 # Prerequisites of lib/getopt*.
302 # emacs' configure.in uses this.
303 AC_DEFUN([gl_PREREQ_GETOPT],
304 [
305 AC_CHECK_DECLS_ONCE([getenv])
306 ])