source: trunk/src/grep/m4/getopt.m4@ 3641

Last change on this file since 3641 was 3529, checked in by bird, 4 years ago

Imported grep 3.7 from grep-3.7.tar.gz (sha256: c22b0cf2d4f6bbe599c902387e8058990e1eee99aef333a203829e5fd3dbb342), applying minimal auto-props.
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File size: 12.8 KB
Line 
1# getopt.m4 serial 47
2dnl Copyright (C) 2002-2006, 2008-2021 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# Request a POSIX compliant getopt function.
8AC_DEFUN([gl_FUNC_GETOPT_POSIX],
9[
10 m4_divert_text([DEFAULTS], [gl_getopt_required=POSIX])
11 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
12 AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
13 dnl Other modules can request the gnulib implementation of the getopt
14 dnl functions unconditionally, by defining gl_REPLACE_GETOPT_ALWAYS.
15 dnl argp.m4 does this.
16 m4_ifdef([gl_REPLACE_GETOPT_ALWAYS], [
17 REPLACE_GETOPT=1
18 ], [
19 REPLACE_GETOPT=0
20 if test -n "$gl_replace_getopt"; then
21 REPLACE_GETOPT=1
22 fi
23 ])
24 if test $REPLACE_GETOPT = 1; then
25 dnl Arrange for getopt.h to be created.
26 gl_GETOPT_SUBSTITUTE_HEADER
27 fi
28])
29
30# Request a POSIX compliant getopt function with GNU extensions (such as
31# options with optional arguments) and the functions getopt_long,
32# getopt_long_only.
33AC_DEFUN([gl_FUNC_GETOPT_GNU],
34[
35 dnl Set the variable gl_getopt_required, so that all invocations of
36 dnl gl_GETOPT_CHECK_HEADERS in the scope of the current configure file
37 dnl will check for getopt with GNU extensions.
38 dnl This means that if one gnulib-tool invocation requests getopt-posix
39 dnl and another gnulib-tool invocation requests getopt-gnu, it is as if
40 dnl both had requested getopt-gnu.
41 m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])
42
43 dnl No need to invoke gl_FUNC_GETOPT_POSIX here; this is automatically
44 dnl done through the module dependency getopt-gnu -> getopt-posix.
45])
46
47# Determine whether to replace the entire getopt facility.
48AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
49[
50 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
51 AC_REQUIRE([AC_PROG_AWK]) dnl for awk that supports ENVIRON
52
53 dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
54 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
55
56 gl_CHECK_NEXT_HEADERS([getopt.h])
57 if test $ac_cv_header_getopt_h = yes; then
58 HAVE_GETOPT_H=1
59 else
60 HAVE_GETOPT_H=0
61 fi
62 AC_SUBST([HAVE_GETOPT_H])
63
64 gl_replace_getopt=
65
66 dnl Test whether <getopt.h> is available.
67 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
68 AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
69 fi
70
71 dnl Test whether the function getopt_long is available.
72 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
73 AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
74 fi
75
76 dnl POSIX 2008 does not specify leading '+' behavior, but see
77 dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
78 dnl the next version of POSIX. For now, we only guarantee leading '+'
79 dnl behavior with getopt-gnu.
80 if test -z "$gl_replace_getopt"; then
81 AC_CACHE_CHECK([whether getopt is POSIX compatible],
82 [gl_cv_func_getopt_posix],
83 [
84 dnl Merging these three different test programs into a single one
85 dnl would require a reset mechanism. On BSD systems, it can be done
86 dnl through 'optreset'; on some others (glibc), it can be done by
87 dnl setting 'optind' to 0; on others again (HP-UX, IRIX, OSF/1,
88 dnl Solaris 9, musl libc), there is no such mechanism.
89 if test $cross_compiling = no; then
90 dnl Sanity check. Succeeds everywhere (except on MSVC,
91 dnl which lacks <unistd.h> and getopt() entirely).
92 AC_RUN_IFELSE(
93 [AC_LANG_SOURCE([[
94#include <unistd.h>
95#include <stdlib.h>
96#include <string.h>
97
98int
99main ()
100{
101 static char program[] = "program";
102 static char a[] = "-a";
103 static char foo[] = "foo";
104 static char bar[] = "bar";
105 char *argv[] = { program, a, foo, bar, NULL };
106 int c;
107
108 c = getopt (4, argv, "ab");
109 if (!(c == 'a'))
110 return 1;
111 c = getopt (4, argv, "ab");
112 if (!(c == -1))
113 return 2;
114 if (!(optind == 2))
115 return 3;
116 return 0;
117}
118]])],
119 [gl_cv_func_getopt_posix=maybe],
120 [gl_cv_func_getopt_posix=no])
121 if test $gl_cv_func_getopt_posix = maybe; then
122 dnl Sanity check with '+'. Succeeds everywhere (except on MSVC,
123 dnl which lacks <unistd.h> and getopt() entirely).
124 AC_RUN_IFELSE(
125 [AC_LANG_SOURCE([[
126#include <unistd.h>
127#include <stdlib.h>
128#include <string.h>
129
130int
131main ()
132{
133 static char program[] = "program";
134 static char donald[] = "donald";
135 static char p[] = "-p";
136 static char billy[] = "billy";
137 static char duck[] = "duck";
138 static char a[] = "-a";
139 static char bar[] = "bar";
140 char *argv[] = { program, donald, p, billy, duck, a, bar, NULL };
141 int c;
142
143 c = getopt (7, argv, "+abp:q:");
144 if (!(c == -1))
145 return 4;
146 if (!(strcmp (argv[0], "program") == 0))
147 return 5;
148 if (!(strcmp (argv[1], "donald") == 0))
149 return 6;
150 if (!(strcmp (argv[2], "-p") == 0))
151 return 7;
152 if (!(strcmp (argv[3], "billy") == 0))
153 return 8;
154 if (!(strcmp (argv[4], "duck") == 0))
155 return 9;
156 if (!(strcmp (argv[5], "-a") == 0))
157 return 10;
158 if (!(strcmp (argv[6], "bar") == 0))
159 return 11;
160 if (!(optind == 1))
161 return 12;
162 return 0;
163}
164]])],
165 [gl_cv_func_getopt_posix=maybe],
166 [gl_cv_func_getopt_posix=no])
167 fi
168 if test $gl_cv_func_getopt_posix = maybe; then
169 dnl Detect Mac OS X 10.5, AIX 7.1, mingw bug.
170 AC_RUN_IFELSE(
171 [AC_LANG_SOURCE([[
172#include <unistd.h>
173#include <stdlib.h>
174#include <string.h>
175
176int
177main ()
178{
179 static char program[] = "program";
180 static char ab[] = "-ab";
181 char *argv[3] = { program, ab, NULL };
182 if (getopt (2, argv, "ab:") != 'a')
183 return 13;
184 if (getopt (2, argv, "ab:") != '?')
185 return 14;
186 if (optopt != 'b')
187 return 15;
188 if (optind != 2)
189 return 16;
190 return 0;
191}
192]])],
193 [gl_cv_func_getopt_posix=yes],
194 [gl_cv_func_getopt_posix=no])
195 fi
196 else
197 case "$host_os" in
198 darwin* | aix* | mingw*) gl_cv_func_getopt_posix="guessing no";;
199 *) gl_cv_func_getopt_posix="guessing yes";;
200 esac
201 fi
202 ])
203 case "$gl_cv_func_getopt_posix" in
204 *no) gl_replace_getopt=yes ;;
205 esac
206 fi
207
208 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
209 AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
210 [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
211 # optstring is necessary for programs like m4 that have POSIX-mandated
212 # semantics for supporting options interspersed with files.
213 # Also, since getopt_long is a GNU extension, we require optind=0.
214 # Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;
215 # so take care to revert to the correct (non-)export state.
216dnl GNU Coding Standards currently allow awk but not env; besides, env
217dnl is ambiguous with environment values that contain newlines.
218 gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
219 case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
220 xx) gl_had_POSIXLY_CORRECT=exported ;;
221 x) gl_had_POSIXLY_CORRECT=yes ;;
222 *) gl_had_POSIXLY_CORRECT= ;;
223 esac
224 POSIXLY_CORRECT=1
225 export POSIXLY_CORRECT
226 AC_RUN_IFELSE(
227 [AC_LANG_PROGRAM([[#include <getopt.h>
228 #include <stddef.h>
229 #include <string.h>
230 ]GL_NOCRASH[
231 ]], [[
232 int result = 0;
233
234 nocrash_init();
235
236 /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
237 and fails on Mac OS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
238 OSF/1 5.1, Solaris 10. */
239 {
240 static char conftest[] = "conftest";
241 static char plus[] = "-+";
242 char *argv[3] = { conftest, plus, NULL };
243 opterr = 0;
244 if (getopt (2, argv, "+a") != '?')
245 result |= 1;
246 }
247 /* This code succeeds on glibc 2.8, mingw,
248 and fails on Mac OS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
249 IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x. */
250 {
251 static char program[] = "program";
252 static char p[] = "-p";
253 static char foo[] = "foo";
254 static char bar[] = "bar";
255 char *argv[] = { program, p, foo, bar, NULL };
256
257 optind = 1;
258 if (getopt (4, argv, "p::") != 'p')
259 result |= 2;
260 else if (optarg != NULL)
261 result |= 4;
262 else if (getopt (4, argv, "p::") != -1)
263 result |= 6;
264 else if (optind != 2)
265 result |= 8;
266 }
267 /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0. */
268 {
269 static char program[] = "program";
270 static char foo[] = "foo";
271 static char p[] = "-p";
272 char *argv[] = { program, foo, p, NULL };
273 optind = 0;
274 if (getopt (3, argv, "-p") != 1)
275 result |= 16;
276 else if (getopt (3, argv, "-p") != 'p')
277 result |= 16;
278 }
279 /* This code fails on glibc 2.11. */
280 {
281 static char program[] = "program";
282 static char b[] = "-b";
283 static char a[] = "-a";
284 char *argv[] = { program, b, a, NULL };
285 optind = opterr = 0;
286 if (getopt (3, argv, "+:a:b") != 'b')
287 result |= 32;
288 else if (getopt (3, argv, "+:a:b") != ':')
289 result |= 32;
290 }
291 /* This code dumps core on glibc 2.14. */
292 {
293 static char program[] = "program";
294 static char w[] = "-W";
295 static char dummy[] = "dummy";
296 char *argv[] = { program, w, dummy, NULL };
297 optind = opterr = 1;
298 if (getopt (3, argv, "W;") != 'W')
299 result |= 64;
300 }
301 return result;
302 ]])],
303 [gl_cv_func_getopt_gnu=yes],
304 [gl_cv_func_getopt_gnu=no],
305 [dnl Cross compiling.
306 dnl Assume the worst, even on glibc platforms.
307 dnl But obey --enable-cross-guesses.
308 gl_cv_func_getopt_gnu="$gl_cross_guess_normal"
309 ])
310 case $gl_had_POSIXLY_CORRECT in
311 exported) ;;
312 yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;
313 *) AS_UNSET([POSIXLY_CORRECT]) ;;
314 esac
315 ])
316 if test "$gl_cv_func_getopt_gnu" != yes; then
317 gl_replace_getopt=yes
318 else
319 AC_CACHE_CHECK([for working GNU getopt_long function],
320 [gl_cv_func_getopt_long_gnu],
321 [AC_RUN_IFELSE(
322 [AC_LANG_PROGRAM(
323 [[#include <getopt.h>
324 #include <stddef.h>
325 #include <string.h>
326 ]],
327 [[static const struct option long_options[] =
328 {
329 { "xtremely-",no_argument, NULL, 1003 },
330 { "xtra", no_argument, NULL, 1001 },
331 { "xtreme", no_argument, NULL, 1002 },
332 { "xtremely", no_argument, NULL, 1003 },
333 { NULL, 0, NULL, 0 }
334 };
335 /* This code fails on OpenBSD 5.0. */
336 {
337 static char program[] = "program";
338 static char xtremel[] = "--xtremel";
339 char *argv[] = { program, xtremel, NULL };
340 int option_index;
341 optind = 1; opterr = 0;
342 if (getopt_long (2, argv, "", long_options, &option_index) != 1003)
343 return 1;
344 }
345 return 0;
346 ]])],
347 [gl_cv_func_getopt_long_gnu=yes],
348 [gl_cv_func_getopt_long_gnu=no],
349 [dnl Cross compiling. Guess no on OpenBSD, yes otherwise.
350 case "$host_os" in
351 openbsd*) gl_cv_func_getopt_long_gnu="guessing no";;
352 *) gl_cv_func_getopt_long_gnu="guessing yes";;
353 esac
354 ])
355 ])
356 case "$gl_cv_func_getopt_long_gnu" in
357 *yes) ;;
358 *) gl_replace_getopt=yes ;;
359 esac
360 fi
361 fi
362])
363
364AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
365[
366 AC_CHECK_HEADERS_ONCE([sys/cdefs.h])
367 if test $ac_cv_header_sys_cdefs_h = yes; then
368 HAVE_SYS_CDEFS_H=1
369 else
370 HAVE_SYS_CDEFS_H=0
371 fi
372 AC_SUBST([HAVE_SYS_CDEFS_H])
373
374 AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
375 [Define to rpl_ if the getopt replacement functions and variables
376 should be used.])
377 GETOPT_H=getopt.h
378 GETOPT_CDEFS_H=getopt-cdefs.h
379 AC_SUBST([GETOPT_H])
380 AC_SUBST([GETOPT_CDEFS_H])
381])
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