summaryrefslogtreecommitdiffstats
path: root/m4/getopt.m4
blob: 7981a09552ba92dee3c6cb678e9e145b48ec8213 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
# getopt.m4 serial 48
dnl Copyright (C) 2002-2006, 2008-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

# Request a POSIX compliant getopt function.
AC_DEFUN([gl_FUNC_GETOPT_POSIX],
[
  m4_divert_text([DEFAULTS], [gl_getopt_required=POSIX])
  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
  AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
  dnl Other modules can request the gnulib implementation of the getopt
  dnl functions unconditionally, by defining gl_REPLACE_GETOPT_ALWAYS.
  dnl argp.m4 does this.
  m4_ifdef([gl_REPLACE_GETOPT_ALWAYS], [
    REPLACE_GETOPT=1
  ], [
    REPLACE_GETOPT=0
    if test -n "$gl_replace_getopt"; then
      REPLACE_GETOPT=1
    fi
  ])
  GL_GENERATE_GETOPT_H=false
  GL_GENERATE_GETOPT_CDEFS_H=false
  if test $REPLACE_GETOPT = 1; then
    dnl Arrange for getopt.h to be created.
    gl_GETOPT_SUBSTITUTE_HEADER
  fi
])

# Request a POSIX compliant getopt function with GNU extensions (such as
# options with optional arguments) and the functions getopt_long,
# getopt_long_only.
AC_DEFUN([gl_FUNC_GETOPT_GNU],
[
  dnl Set the variable gl_getopt_required, so that all invocations of
  dnl gl_GETOPT_CHECK_HEADERS in the scope of the current configure file
  dnl will check for getopt with GNU extensions.
  dnl This means that if one gnulib-tool invocation requests getopt-posix
  dnl and another gnulib-tool invocation requests getopt-gnu, it is as if
  dnl both had requested getopt-gnu.
  m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])

  dnl No need to invoke gl_FUNC_GETOPT_POSIX here; this is automatically
  dnl done through the module dependency getopt-gnu -> getopt-posix.
])

# Determine whether to replace the entire getopt facility.
AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
[
  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  AC_REQUIRE([AC_PROG_AWK]) dnl for awk that supports ENVIRON

  dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])

  gl_CHECK_NEXT_HEADERS([getopt.h])
  if test $ac_cv_header_getopt_h = yes; then
    HAVE_GETOPT_H=1
  else
    HAVE_GETOPT_H=0
  fi
  AC_SUBST([HAVE_GETOPT_H])

  gl_replace_getopt=

  dnl Test whether <getopt.h> is available.
  if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
    AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
  fi

  dnl Test whether the function getopt_long is available.
  if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
    AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
  fi

  dnl POSIX 2008 does not specify leading '+' behavior, but see
  dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
  dnl the next version of POSIX.  For now, we only guarantee leading '+'
  dnl behavior with getopt-gnu.
  if test -z "$gl_replace_getopt"; then
    AC_CACHE_CHECK([whether getopt is POSIX compatible],
      [gl_cv_func_getopt_posix],
      [
        dnl Merging these three different test programs into a single one
        dnl would require a reset mechanism. On BSD systems, it can be done
        dnl through 'optreset'; on some others (glibc), it can be done by
        dnl setting 'optind' to 0; on others again (HP-UX, IRIX, OSF/1,
        dnl Solaris 9, musl libc), there is no such mechanism.
        if test $cross_compiling = no; then
          dnl Sanity check. Succeeds everywhere (except on MSVC,
          dnl which lacks <unistd.h> and getopt() entirely).
          AC_RUN_IFELSE(
            [AC_LANG_SOURCE([[
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

int
main ()
{
  static char program[] = "program";
  static char a[] = "-a";
  static char foo[] = "foo";
  static char bar[] = "bar";
  char *argv[] = { program, a, foo, bar, NULL };
  int c;

  c = getopt (4, argv, "ab");
  if (!(c == 'a'))
    return 1;
  c = getopt (4, argv, "ab");
  if (!(c == -1))
    return 2;
  if (!(optind == 2))
    return 3;
  return 0;
}
]])],
            [gl_cv_func_getopt_posix=maybe],
            [gl_cv_func_getopt_posix=no])
          if test $gl_cv_func_getopt_posix = maybe; then
            dnl Sanity check with '+'. Succeeds everywhere (except on MSVC,
            dnl which lacks <unistd.h> and getopt() entirely).
            AC_RUN_IFELSE(
              [AC_LANG_SOURCE([[
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

int
main ()
{
  static char program[] = "program";
  static char donald[] = "donald";
  static char p[] = "-p";
  static char billy[] = "billy";
  static char duck[] = "duck";
  static char a[] = "-a";
  static char bar[] = "bar";
  char *argv[] = { program, donald, p, billy, duck, a, bar, NULL };
  int c;

  c = getopt (7, argv, "+abp:q:");
  if (!(c == -1))
    return 4;
  if (!(strcmp (argv[0], "program") == 0))
    return 5;
  if (!(strcmp (argv[1], "donald") == 0))
    return 6;
  if (!(strcmp (argv[2], "-p") == 0))
    return 7;
  if (!(strcmp (argv[3], "billy") == 0))
    return 8;
  if (!(strcmp (argv[4], "duck") == 0))
    return 9;
  if (!(strcmp (argv[5], "-a") == 0))
    return 10;
  if (!(strcmp (argv[6], "bar") == 0))
    return 11;
  if (!(optind == 1))
    return 12;
  return 0;
}
]])],
              [gl_cv_func_getopt_posix=maybe],
              [gl_cv_func_getopt_posix=no])
          fi
          if test $gl_cv_func_getopt_posix = maybe; then
            dnl Detect Mac OS X 10.5, AIX 7.1, mingw bug.
            AC_RUN_IFELSE(
              [AC_LANG_SOURCE([[
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

int
main ()
{
  static char program[] = "program";
  static char ab[] = "-ab";
  char *argv[3] = { program, ab, NULL };
  if (getopt (2, argv, "ab:") != 'a')
    return 13;
  if (getopt (2, argv, "ab:") != '?')
    return 14;
  if (optopt != 'b')
    return 15;
  if (optind != 2)
    return 16;
  return 0;
}
]])],
              [gl_cv_func_getopt_posix=yes],
              [gl_cv_func_getopt_posix=no])
          fi
        else
          case "$host_os" in
            darwin* | aix* | mingw*) gl_cv_func_getopt_posix="guessing no";;
            *)                       gl_cv_func_getopt_posix="guessing yes";;
          esac
        fi
      ])
    case "$gl_cv_func_getopt_posix" in
      *no) gl_replace_getopt=yes ;;
    esac
  fi

  if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
    AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
      [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
       # optstring is necessary for programs like m4 that have POSIX-mandated
       # semantics for supporting options interspersed with files.
       # Also, since getopt_long is a GNU extension, we require optind=0.
       # Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;
       # so take care to revert to the correct (non-)export state.
dnl GNU Coding Standards currently allow awk but not env; besides, env
dnl is ambiguous with environment values that contain newlines.
       gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
       case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
         xx) gl_had_POSIXLY_CORRECT=exported ;;
         x)  gl_had_POSIXLY_CORRECT=yes      ;;
         *)  gl_had_POSIXLY_CORRECT=         ;;
       esac
       POSIXLY_CORRECT=1
       export POSIXLY_CORRECT
       AC_RUN_IFELSE(
        [AC_LANG_PROGRAM([[#include <getopt.h>
                           #include <stddef.h>
                           #include <string.h>
           ]GL_NOCRASH[
           ]], [[
             int result = 0;

             nocrash_init();

             /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
                and fails on Mac OS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
                OSF/1 5.1, Solaris 10.  */
             {
               static char conftest[] = "conftest";
               static char plus[] = "-+";
               char *argv[3] = { conftest, plus, NULL };
               opterr = 0;
               if (getopt (2, argv, "+a") != '?')
                 result |= 1;
             }
             /* This code succeeds on glibc 2.8, mingw,
                and fails on Mac OS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
                IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x.  */
             {
               static char program[] = "program";
               static char p[] = "-p";
               static char foo[] = "foo";
               static char bar[] = "bar";
               char *argv[] = { program, p, foo, bar, NULL };

               optind = 1;
               if (getopt (4, argv, "p::") != 'p')
                 result |= 2;
               else if (optarg != NULL)
                 result |= 4;
               else if (getopt (4, argv, "p::") != -1)
                 result |= 6;
               else if (optind != 2)
                 result |= 8;
             }
             /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0.  */
             {
               static char program[] = "program";
               static char foo[] = "foo";
               static char p[] = "-p";
               char *argv[] = { program, foo, p, NULL };
               optind = 0;
               if (getopt (3, argv, "-p") != 1)
                 result |= 16;
               else if (getopt (3, argv, "-p") != 'p')
                 result |= 16;
             }
             /* This code fails on glibc 2.11.  */
             {
               static char program[] = "program";
               static char b[] = "-b";
               static char a[] = "-a";
               char *argv[] = { program, b, a, NULL };
               optind = opterr = 0;
               if (getopt (3, argv, "+:a:b") != 'b')
                 result |= 32;
               else if (getopt (3, argv, "+:a:b") != ':')
                 result |= 32;
             }
             /* This code dumps core on glibc 2.14.  */
             {
               static char program[] = "program";
               static char w[] = "-W";
               static char dummy[] = "dummy";
               char *argv[] = { program, w, dummy, NULL };
               optind = opterr = 1;
               if (getopt (3, argv, "W;") != 'W')
                 result |= 64;
             }
             return result;
           ]])],
        [gl_cv_func_getopt_gnu=yes],
        [gl_cv_func_getopt_gnu=no],
        [dnl Cross compiling.
         dnl Assume the worst, even on glibc platforms.
         dnl But obey --enable-cross-guesses.
         gl_cv_func_getopt_gnu="$gl_cross_guess_normal"
        ])
       case $gl_had_POSIXLY_CORRECT in
         exported) ;;
         yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;
         *) AS_UNSET([POSIXLY_CORRECT]) ;;
       esac
      ])
    if test "$gl_cv_func_getopt_gnu" != yes; then
      gl_replace_getopt=yes
    else
      AC_CACHE_CHECK([for working GNU getopt_long function],
        [gl_cv_func_getopt_long_gnu],
        [AC_RUN_IFELSE(
           [AC_LANG_PROGRAM(
              [[#include <getopt.h>
                #include <stddef.h>
                #include <string.h>
              ]],
              [[static const struct option long_options[] =
                  {
                    { "xtremely-",no_argument,       NULL, 1003 },
                    { "xtra",     no_argument,       NULL, 1001 },
                    { "xtreme",   no_argument,       NULL, 1002 },
                    { "xtremely", no_argument,       NULL, 1003 },
                    { NULL,       0,                 NULL, 0 }
                  };
                /* This code fails on OpenBSD 5.0.  */
                {
                  static char program[] = "program";
                  static char xtremel[] = "--xtremel";
                  char *argv[] = { program, xtremel, NULL };
                  int option_index;
                  optind = 1; opterr = 0;
                  if (getopt_long (2, argv, "", long_options, &option_index) != 1003)
                    return 1;
                }
                return 0;
              ]])],
           [gl_cv_func_getopt_long_gnu=yes],
           [gl_cv_func_getopt_long_gnu=no],
           [dnl Cross compiling. Guess no on OpenBSD, yes otherwise.
            case "$host_os" in
              openbsd*) gl_cv_func_getopt_long_gnu="guessing no";;
              *)        gl_cv_func_getopt_long_gnu="guessing yes";;
            esac
           ])
        ])
      case "$gl_cv_func_getopt_long_gnu" in
        *yes) ;;
        *) gl_replace_getopt=yes ;;
      esac
    fi
  fi
])

AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
[
  AC_CHECK_HEADERS_ONCE([sys/cdefs.h])
  if test $ac_cv_header_sys_cdefs_h = yes; then
    HAVE_SYS_CDEFS_H=1
  else
    HAVE_SYS_CDEFS_H=0
  fi
  AC_SUBST([HAVE_SYS_CDEFS_H])

  AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
    [Define to rpl_ if the getopt replacement functions and variables
     should be used.])
  GL_GENERATE_GETOPT_H=true
  GL_GENERATE_GETOPT_CDEFS_H=true
])