m4/getopt.m4

   1 # getopt.m4 serial 44
   2 dnl Copyright (C) 2002-2006, 2008-2014 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.
   6
   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   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.
  33 AC_DEFUN([gl_FUNC_GETOPT_GNU],
  34 [
  35   m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])
  36
  37   AC_REQUIRE([gl_FUNC_GETOPT_POSIX])
  38 ])
  39
  40 # Determine whether to replace the entire getopt facility.
  41 AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
  42 [
  43   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  44   AC_REQUIRE([AC_PROG_AWK]) dnl for awk that supports ENVIRON
  45
  46   dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
  47   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
  48
  49   gl_CHECK_NEXT_HEADERS([getopt.h])
  50   if test $ac_cv_header_getopt_h = yes; then
  51     HAVE_GETOPT_H=1
  52   else
  53     HAVE_GETOPT_H=0
  54   fi
  55   AC_SUBST([HAVE_GETOPT_H])
  56
  57   gl_replace_getopt=
  58
  59   dnl Test whether <getopt.h> is available.
  60   if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
  61     AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
  62   fi
  63
  64   dnl Test whether the function getopt_long is available.
  65   if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
  66     AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
  67   fi
  68
  69   dnl POSIX 2008 does not specify leading '+' behavior, but see
  70   dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
  71   dnl the next version of POSIX.  For now, we only guarantee leading '+'
  72   dnl behavior with getopt-gnu.
  73   if test -z "$gl_replace_getopt"; then
  74     AC_CACHE_CHECK([whether getopt is POSIX compatible],
  75       [gl_cv_func_getopt_posix],
  76       [
  77         dnl Merging these three different test programs into a single one
  78         dnl would require a reset mechanism. On BSD systems, it can be done
  79         dnl through 'optreset'; on some others (glibc), it can be done by
  80         dnl setting 'optind' to 0; on others again (HP-UX, IRIX, OSF/1,
  81         dnl Solaris 9, musl libc), there is no such mechanism.
  82         if test $cross_compiling = no; then
  83           dnl Sanity check. Succeeds everywhere (except on MSVC,
  84           dnl which lacks <unistd.h> and getopt() entirely).
  85           AC_RUN_IFELSE(
  86             [AC_LANG_SOURCE([[
  87 #include <unistd.h>
  88 #include <stdlib.h>
  89 #include <string.h>
  90
  91 int
  92 main ()
  93 {
  94   static char program[] = "program";
  95   static char a[] = "-a";
  96   static char foo[] = "foo";
  97   static char bar[] = "bar";
  98   char *argv[] = { program, a, foo, bar, NULL };
  99   int c;
 100
 101   c = getopt (4, argv, "ab");
 102   if (!(c == 'a'))
 103     return 1;
 104   c = getopt (4, argv, "ab");
 105   if (!(c == -1))
 106     return 2;
 107   if (!(optind == 2))
 108     return 3;
 109   return 0;
 110 }
 111 ]])],
 112             [gl_cv_func_getopt_posix=maybe],
 113             [gl_cv_func_getopt_posix=no])
 114           if test $gl_cv_func_getopt_posix = maybe; then
 115             dnl Sanity check with '+'. Succeeds everywhere (except on MSVC,
 116             dnl which lacks <unistd.h> and getopt() entirely).
 117             AC_RUN_IFELSE(
 118               [AC_LANG_SOURCE([[
 119 #include <unistd.h>
 120 #include <stdlib.h>
 121 #include <string.h>
 122
 123 int
 124 main ()
 125 {
 126   static char program[] = "program";
 127   static char donald[] = "donald";
 128   static char p[] = "-p";
 129   static char billy[] = "billy";
 130   static char duck[] = "duck";
 131   static char a[] = "-a";
 132   static char bar[] = "bar";
 133   char *argv[] = { program, donald, p, billy, duck, a, bar, NULL };
 134   int c;
 135
 136   c = getopt (7, argv, "+abp:q:");
 137   if (!(c == -1))
 138     return 4;
 139   if (!(strcmp (argv[0], "program") == 0))
 140     return 5;
 141   if (!(strcmp (argv[1], "donald") == 0))
 142     return 6;
 143   if (!(strcmp (argv[2], "-p") == 0))
 144     return 7;
 145   if (!(strcmp (argv[3], "billy") == 0))
 146     return 8;
 147   if (!(strcmp (argv[4], "duck") == 0))
 148     return 9;
 149   if (!(strcmp (argv[5], "-a") == 0))
 150     return 10;
 151   if (!(strcmp (argv[6], "bar") == 0))
 152     return 11;
 153   if (!(optind == 1))
 154     return 12;
 155   return 0;
 156 }
 157 ]])],
 158               [gl_cv_func_getopt_posix=maybe],
 159               [gl_cv_func_getopt_posix=no])
 160           fi
 161           if test $gl_cv_func_getopt_posix = maybe; then
 162             dnl Detect Mac OS X 10.5, AIX 7.1, mingw bug.
 163             AC_RUN_IFELSE(
 164               [AC_LANG_SOURCE([[
 165 #include <unistd.h>
 166 #include <stdlib.h>
 167 #include <string.h>
 168
 169 int
 170 main ()
 171 {
 172   static char program[] = "program";
 173   static char ab[] = "-ab";
 174   char *argv[3] = { program, ab, NULL };
 175   if (getopt (2, argv, "ab:") != 'a')
 176     return 13;
 177   if (getopt (2, argv, "ab:") != '?')
 178     return 14;
 179   if (optopt != 'b')
 180     return 15;
 181   if (optind != 2)
 182     return 16;
 183   return 0;
 184 }
 185 ]])],
 186               [gl_cv_func_getopt_posix=yes],
 187               [gl_cv_func_getopt_posix=no])
 188           fi
 189         else
 190           case "$host_os" in
 191             darwin* | aix* | mingw*) gl_cv_func_getopt_posix="guessing no";;
 192             *)                       gl_cv_func_getopt_posix="guessing yes";;
 193           esac
 194         fi
 195       ])
 196     case "$gl_cv_func_getopt_posix" in
 197       *no) gl_replace_getopt=yes ;;
 198     esac
 199   fi
 200
 201   if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
 202     AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
 203       [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
 204        # optstring is necessary for programs like m4 that have POSIX-mandated
 205        # semantics for supporting options interspersed with files.
 206        # Also, since getopt_long is a GNU extension, we require optind=0.
 207        # Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;
 208        # so take care to revert to the correct (non-)export state.
 209 dnl GNU Coding Standards currently allow awk but not env; besides, env
 210 dnl is ambiguous with environment values that contain newlines.
 211        gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
 212        case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
 213          xx) gl_had_POSIXLY_CORRECT=exported ;;
 214          x)  gl_had_POSIXLY_CORRECT=yes      ;;
 215          *)  gl_had_POSIXLY_CORRECT=         ;;
 216        esac
 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            ]GL_NOCRASH[
 224            ]], [[
 225              int result = 0;
 226
 227              nocrash_init();
 228
 229              /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
 230                 and fails on Mac OS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
 231                 OSF/1 5.1, Solaris 10.  */
 232              {
 233                static char conftest[] = "conftest";
 234                static char plus[] = "-+";
 235                char *argv[3] = { conftest, plus, NULL };
 236                opterr = 0;
 237                if (getopt (2, argv, "+a") != '?')
 238                  result |= 1;
 239              }
 240              /* This code succeeds on glibc 2.8, mingw,
 241                 and fails on Mac OS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
 242                 IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x.  */
 243              {
 244                static char program[] = "program";
 245                static char p[] = "-p";
 246                static char foo[] = "foo";
 247                static char bar[] = "bar";
 248                char *argv[] = { program, p, foo, bar, NULL };
 249
 250                optind = 1;
 251                if (getopt (4, argv, "p::") != 'p')
 252                  result |= 2;
 253                else if (optarg != NULL)
 254                  result |= 4;
 255                else if (getopt (4, argv, "p::") != -1)
 256                  result |= 6;
 257                else if (optind != 2)
 258                  result |= 8;
 259              }
 260              /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0.  */
 261              {
 262                static char program[] = "program";
 263                static char foo[] = "foo";
 264                static char p[] = "-p";
 265                char *argv[] = { program, foo, p, NULL };
 266                optind = 0;
 267                if (getopt (3, argv, "-p") != 1)
 268                  result |= 16;
 269                else if (getopt (3, argv, "-p") != 'p')
 270                  result |= 16;
 271              }
 272              /* This code fails on glibc 2.11.  */
 273              {
 274                static char program[] = "program";
 275                static char b[] = "-b";
 276                static char a[] = "-a";
 277                char *argv[] = { program, b, a, NULL };
 278                optind = opterr = 0;
 279                if (getopt (3, argv, "+:a:b") != 'b')
 280                  result |= 32;
 281                else if (getopt (3, argv, "+:a:b") != ':')
 282                  result |= 32;
 283              }
 284              /* This code dumps core on glibc 2.14.  */
 285              {
 286                static char program[] = "program";
 287                static char w[] = "-W";
 288                static char dummy[] = "dummy";
 289                char *argv[] = { program, w, dummy, NULL };
 290                optind = opterr = 1;
 291                if (getopt (3, argv, "W;") != 'W')
 292                  result |= 64;
 293              }
 294              return result;
 295            ]])],
 296         [gl_cv_func_getopt_gnu=yes],
 297         [gl_cv_func_getopt_gnu=no],
 298         [dnl Cross compiling. Assume the worst, even on glibc platforms.
 299          gl_cv_func_getopt_gnu="guessing no"
 300         ])
 301        case $gl_had_POSIXLY_CORRECT in
 302          exported) ;;
 303          yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;
 304          *) AS_UNSET([POSIXLY_CORRECT]) ;;
 305        esac
 306       ])
 307     if test "$gl_cv_func_getopt_gnu" != yes; then
 308       gl_replace_getopt=yes
 309     else
 310       AC_CACHE_CHECK([for working GNU getopt_long function],
 311         [gl_cv_func_getopt_long_gnu],
 312         [AC_RUN_IFELSE(
 313            [AC_LANG_PROGRAM(
 314               [[#include <getopt.h>
 315                 #include <stddef.h>
 316                 #include <string.h>
 317               ]],
 318               [[static const struct option long_options[] =
 319                   {
 320                     { "xtremely-",no_argument,       NULL, 1003 },
 321                     { "xtra",     no_argument,       NULL, 1001 },
 322                     { "xtreme",   no_argument,       NULL, 1002 },
 323                     { "xtremely", no_argument,       NULL, 1003 },
 324                     { NULL,       0,                 NULL, 0 }
 325                   };
 326                 /* This code fails on OpenBSD 5.0.  */
 327                 {
 328                   static char program[] = "program";
 329                   static char xtremel[] = "--xtremel";
 330                   char *argv[] = { program, xtremel, NULL };
 331                   int option_index;
 332                   optind = 1; opterr = 0;
 333                   if (getopt_long (2, argv, "", long_options, &option_index) != 1003)
 334                     return 1;
 335                 }
 336                 return 0;
 337               ]])],
 338            [gl_cv_func_getopt_long_gnu=yes],
 339            [gl_cv_func_getopt_long_gnu=no],
 340            [dnl Cross compiling. Guess no on OpenBSD, yes otherwise.
 341             case "$host_os" in
 342               openbsd*) gl_cv_func_getopt_long_gnu="guessing no";;
 343               *)        gl_cv_func_getopt_long_gnu="guessing yes";;
 344             esac
 345            ])
 346         ])
 347       case "$gl_cv_func_getopt_long_gnu" in
 348         *yes) ;;
 349         *) gl_replace_getopt=yes ;;
 350       esac
 351     fi
 352   fi
 353 ])
 354
 355 AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
 356 [
 357   GETOPT_H=getopt.h
 358   AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
 359     [Define to rpl_ if the getopt replacement functions and variables
 360      should be used.])
 361   AC_SUBST([GETOPT_H])
 362 ])
 363
 364 # Prerequisites of lib/getopt*.
 365 AC_DEFUN([gl_PREREQ_GETOPT],
 366 [
 367   AC_CHECK_DECLS_ONCE([getenv])
 368 ])