2 dnl Copyright (C) 2002-2006, 2008-2011 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])
12 dnl Other modules can request the gnulib implementation of the getopt
13 dnl functions unconditionally, by defining gl_REPLACE_GETOPT_ALWAYS.
14 dnl argp.m4 does this.
15 m4_ifdef([gl_REPLACE_GETOPT_ALWAYS], [
16 gl_GETOPT_IFELSE([], [])
25 if test $REPLACE_GETOPT = 1; then
26 dnl Arrange for getopt.h to be created.
27 gl_GETOPT_SUBSTITUTE_HEADER
28 dnl Arrange for unistd.h to include getopt.h.
29 GNULIB_UNISTD_H_GETOPT=1
33 # Request a POSIX compliant getopt function with GNU extensions (such as
34 # options with optional arguments) and the functions getopt_long,
36 AC_DEFUN([gl_FUNC_GETOPT_GNU],
38 m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])
40 AC_REQUIRE([gl_FUNC_GETOPT_POSIX])
43 # emacs' configure.in uses this.
44 AC_DEFUN([gl_GETOPT_IFELSE],
46 AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
47 AS_IF([test -n "$gl_replace_getopt"], [$1], [$2])
50 # Determine whether to replace the entire getopt facility.
51 AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
53 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
54 AC_REQUIRE([AC_PROG_AWK]) dnl for awk that supports ENVIRON
56 dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
57 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
59 gl_CHECK_NEXT_HEADERS([getopt.h])
60 if test $ac_cv_header_getopt_h = yes; then
65 AC_SUBST([HAVE_GETOPT_H])
69 dnl Test whether <getopt.h> is available.
70 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
71 AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
74 dnl Test whether the function getopt_long is available.
75 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
76 AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
79 dnl mingw's getopt (in libmingwex.a) does weird things when the options
80 dnl strings starts with '+' and it's not the first call. Some internal state
81 dnl is left over from earlier calls, and neither setting optind = 0 nor
82 dnl setting optreset = 1 get rid of this internal state.
83 dnl POSIX is silent on optind vs. optreset, so we allow either behavior.
84 dnl POSIX 2008 does not specify leading '+' behavior, but see
85 dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
86 dnl the next version of POSIX. For now, we only guarantee leading '+'
87 dnl behavior with getopt-gnu.
88 if test -z "$gl_replace_getopt"; then
89 AC_CACHE_CHECK([whether getopt is POSIX compatible],
90 [gl_cv_func_getopt_posix],
92 dnl BSD getopt_long uses an incompatible method to reset
93 dnl option processing. Existence of the variable, in and of
94 dnl itself, is not a reason to replace getopt, but knowledge
95 dnl of the variable is needed to determine how to reset and
96 dnl whether a reset reparses the environment. Solaris
97 dnl supports neither optreset nor optind=0, but keeps no state
98 dnl that needs a reset beyond setting optind=1; detect Solaris
102 [[#include <unistd.h>]],
103 [[int *p = &optreset; return optreset;]])],
107 [[#include <getopt.h>]],
108 [[return !getopt_clip;]])],
112 dnl This test fails on mingw and succeeds on many other platforms.
113 gl_save_CPPFLAGS=$CPPFLAGS
114 CPPFLAGS="$CPPFLAGS -DOPTIND_MIN=$gl_optind_min"
115 AC_RUN_IFELSE([AC_LANG_SOURCE([[
128 argv[argc++] = "program";
130 argv[argc++] = "foo";
131 argv[argc++] = "bar";
136 c = getopt (argc, argv, "ab");
139 c = getopt (argc, argv, "ab");
145 /* Some internal state exists at this point. */
151 argv[argc++] = "program";
152 argv[argc++] = "donald";
154 argv[argc++] = "billy";
155 argv[argc++] = "duck";
157 argv[argc++] = "bar";
162 c = getopt (argc, argv, "+abp:q:");
165 if (!(strcmp (argv[0], "program") == 0))
167 if (!(strcmp (argv[1], "donald") == 0))
169 if (!(strcmp (argv[2], "-p") == 0))
171 if (!(strcmp (argv[3], "billy") == 0))
173 if (!(strcmp (argv[4], "duck") == 0))
175 if (!(strcmp (argv[5], "-a") == 0))
177 if (!(strcmp (argv[6], "bar") == 0))
182 /* Detect MacOS 10.5, AIX 7.1 bug. */
184 char *argv[3] = { "program", "-ab", NULL };
187 if (getopt (2, argv, "ab:") != 'a')
189 if (getopt (2, argv, "ab:") != '?')
200 [gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
202 mingw*) gl_cv_func_getopt_posix="guessing no";;
203 darwin* | aix*) gl_cv_func_getopt_posix="guessing no";;
204 *) gl_cv_func_getopt_posix="guessing yes";;
207 CPPFLAGS=$gl_save_CPPFLAGS
209 case "$gl_cv_func_getopt_posix" in
210 *no) gl_replace_getopt=yes ;;
214 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
215 AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
216 [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
217 # optstring is necessary for programs like m4 that have POSIX-mandated
218 # semantics for supporting options interspersed with files.
219 # Also, since getopt_long is a GNU extension, we require optind=0.
220 # Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;
221 # so take care to revert to the correct (non-)export state.
222 dnl GNU Coding Standards currently allow awk but not env; besides, env
223 dnl is ambiguous with environment values that contain newlines.
224 gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
225 case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
226 xx) gl_had_POSIXLY_CORRECT=exported ;;
227 x) gl_had_POSIXLY_CORRECT=yes ;;
228 *) gl_had_POSIXLY_CORRECT= ;;
231 export POSIXLY_CORRECT
233 [AC_LANG_PROGRAM([[#include <getopt.h>
238 /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
239 and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
240 OSF/1 5.1, Solaris 10. */
243 myargv[0] = "conftest";
247 if (getopt (2, myargv, "+a") != '?')
250 /* This code succeeds on glibc 2.8, mingw,
251 and fails on MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
252 IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x. */
254 char *argv[] = { "program", "-p", "foo", "bar", NULL };
257 if (getopt (4, argv, "p::") != 'p')
259 else if (optarg != NULL)
261 else if (getopt (4, argv, "p::") != -1)
263 else if (optind != 2)
266 /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0. */
268 char *argv[] = { "program", "foo", "-p", NULL };
270 if (getopt (3, argv, "-p") != 1)
272 else if (getopt (3, argv, "-p") != 'p')
275 /* This code fails on glibc 2.11. */
277 char *argv[] = { "program", "-b", "-a", NULL };
279 if (getopt (3, argv, "+:a:b") != 'b')
281 else if (getopt (3, argv, "+:a:b") != ':')
286 [gl_cv_func_getopt_gnu=yes],
287 [gl_cv_func_getopt_gnu=no],
288 [dnl Cross compiling. Guess based on host and declarations.
289 case $host_os:$ac_cv_have_decl_optreset in
290 *-gnu*:* | mingw*:*) gl_cv_func_getopt_gnu=no;;
291 *:yes) gl_cv_func_getopt_gnu=no;;
292 *) gl_cv_func_getopt_gnu=yes;;
295 case $gl_had_POSIXLY_CORRECT in
297 yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;
298 *) AS_UNSET([POSIXLY_CORRECT]) ;;
301 if test "$gl_cv_func_getopt_gnu" = "no"; then
302 gl_replace_getopt=yes
307 # emacs' configure.in uses this.
308 AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
311 AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
312 [Define to rpl_ if the getopt replacement functions and variables
317 # Prerequisites of lib/getopt*.
318 # emacs' configure.in uses this.
319 AC_DEFUN([gl_PREREQ_GETOPT],
321 AC_CHECK_DECLS_ONCE([getenv])