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])
18 # Request a POSIX compliant getopt function with GNU extensions (such as
19 # options with optional arguments) and the functions getopt_long,
21 AC_DEFUN([gl_FUNC_GETOPT_GNU],
23 m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])
25 AC_REQUIRE([gl_FUNC_GETOPT_POSIX])
28 # Request the gnulib implementation of the getopt functions unconditionally.
30 AC_DEFUN([gl_REPLACE_GETOPT],
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.
42 # emacs' configure.in uses this.
43 AC_DEFUN([gl_GETOPT_IFELSE],
45 AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
46 AS_IF([test -n "$gl_replace_getopt"], [$1], [$2])
49 # Determine whether to replace the entire getopt facility.
50 AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
52 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
53 AC_REQUIRE([AC_PROG_AWK]) dnl for awk that supports ENVIRON
55 dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
56 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
58 gl_CHECK_NEXT_HEADERS([getopt.h])
59 AC_CHECK_HEADERS_ONCE([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 $gl_getopt_required = GNU; then
76 AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
79 dnl BSD getopt_long uses an incompatible method to reset option processing.
80 dnl Existence of the variable, in and of itself, is not a reason to replace
81 dnl getopt, but knowledge of the variable is needed to determine how to
82 dnl reset and whether a reset reparses the environment.
83 dnl Solaris supports neither optreset nor optind=0, but keeps no state that
84 dnl needs a reset beyond setting optind=1; detect Solaris by getopt_clip.
85 if test -z "$gl_replace_getopt"; then
86 AC_CHECK_DECLS([optreset], [],
87 [AC_CHECK_DECLS([getopt_clip], [], [],
88 [[#include <getopt.h>]])
90 [[#include <getopt.h>]])
93 dnl mingw's getopt (in libmingwex.a) does weird things when the options
94 dnl strings starts with '+' and it's not the first call. Some internal state
95 dnl is left over from earlier calls, and neither setting optind = 0 nor
96 dnl setting optreset = 1 get rid of this internal state.
97 dnl POSIX is silent on optind vs. optreset, so we allow either behavior.
98 dnl POSIX 2008 does not specify leading '+' behavior, but see
99 dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
100 dnl the next version of POSIX. For now, we only guarantee leading '+'
101 dnl behavior with getopt-gnu.
102 if test -z "$gl_replace_getopt"; then
103 AC_CACHE_CHECK([whether getopt is POSIX compatible],
104 [gl_cv_func_getopt_posix],
106 dnl This test fails on mingw and succeeds on many other platforms.
107 AC_RUN_IFELSE([AC_LANG_SOURCE([[
112 #if !HAVE_DECL_OPTRESET && !HAVE_DECL_GETOPT_CLIP
113 # define OPTIND_MIN 0
115 # define OPTIND_MIN 1
126 argv[argc++] = "program";
128 argv[argc++] = "foo";
129 argv[argc++] = "bar";
134 c = getopt (argc, argv, "ab");
137 c = getopt (argc, argv, "ab");
143 /* Some internal state exists at this point. */
149 argv[argc++] = "program";
150 argv[argc++] = "donald";
152 argv[argc++] = "billy";
153 argv[argc++] = "duck";
155 argv[argc++] = "bar";
160 c = getopt (argc, argv, "+abp:q:");
163 if (!(strcmp (argv[0], "program") == 0))
165 if (!(strcmp (argv[1], "donald") == 0))
167 if (!(strcmp (argv[2], "-p") == 0))
169 if (!(strcmp (argv[3], "billy") == 0))
171 if (!(strcmp (argv[4], "duck") == 0))
173 if (!(strcmp (argv[5], "-a") == 0))
175 if (!(strcmp (argv[6], "bar") == 0))
180 /* Detect MacOS 10.5, AIX 7.1 bug. */
182 char *argv[3] = { "program", "-ab", NULL };
185 if (getopt (2, argv, "ab:") != 'a')
187 if (getopt (2, argv, "ab:") != '?')
198 [gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
200 mingw*) gl_cv_func_getopt_posix="guessing no";;
201 darwin* | aix*) gl_cv_func_getopt_posix="guessing no";;
202 *) gl_cv_func_getopt_posix="guessing yes";;
206 case "$gl_cv_func_getopt_posix" in
207 *no) gl_replace_getopt=yes ;;
211 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
212 AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
213 [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
214 # optstring is necessary for programs like m4 that have POSIX-mandated
215 # semantics for supporting options interspersed with files.
216 # Also, since getopt_long is a GNU extension, we require optind=0.
217 # Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;
218 # so take care to revert to the correct (non-)export state.
219 dnl GNU Coding Standards currently allow awk but not env; besides, env
220 dnl is ambiguous with environment values that contain newlines.
221 gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
222 case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
223 xx) gl_had_POSIXLY_CORRECT=exported ;;
224 x) gl_had_POSIXLY_CORRECT=yes ;;
225 *) gl_had_POSIXLY_CORRECT= ;;
228 export POSIXLY_CORRECT
230 [AC_LANG_PROGRAM([[#include <getopt.h>
235 /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
236 and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
237 OSF/1 5.1, Solaris 10. */
240 myargv[0] = "conftest";
244 if (getopt (2, myargv, "+a") != '?')
247 /* This code succeeds on glibc 2.8, mingw,
248 and fails on MacOS 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. */
251 char *argv[] = { "program", "-p", "foo", "bar", NULL };
254 if (getopt (4, argv, "p::") != 'p')
256 else if (optarg != NULL)
258 else if (getopt (4, argv, "p::") != -1)
260 else if (optind != 2)
263 /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0. */
265 char *argv[] = { "program", "foo", "-p", NULL };
267 if (getopt (3, argv, "-p") != 1)
269 else if (getopt (3, argv, "-p") != 'p')
272 /* This code fails on glibc 2.11. */
274 char *argv[] = { "program", "-b", "-a", NULL };
276 if (getopt (3, argv, "+:a:b") != 'b')
278 else if (getopt (3, argv, "+:a:b") != ':')
283 [gl_cv_func_getopt_gnu=yes],
284 [gl_cv_func_getopt_gnu=no],
285 [dnl Cross compiling. Guess based on host and declarations.
286 case $host_os:$ac_cv_have_decl_optreset in
287 *-gnu*:* | mingw*:*) gl_cv_func_getopt_gnu=no;;
288 *:yes) gl_cv_func_getopt_gnu=no;;
289 *) gl_cv_func_getopt_gnu=yes;;
292 case $gl_had_POSIXLY_CORRECT in
294 yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;
295 *) AS_UNSET([POSIXLY_CORRECT]) ;;
298 if test "$gl_cv_func_getopt_gnu" = "no"; then
299 gl_replace_getopt=yes
304 # emacs' configure.in uses this.
305 AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
308 AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
309 [Define to rpl_ if the getopt replacement functions and variables
314 # Prerequisites of lib/getopt*.
315 # emacs' configure.in uses this.
316 AC_DEFUN([gl_PREREQ_GETOPT],
318 AC_CHECK_DECLS_ONCE([getenv])