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 if test $ac_cv_header_getopt_h = yes; then
64 AC_SUBST([HAVE_GETOPT_H])
68 dnl Test whether <getopt.h> is available.
69 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
70 AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
73 dnl Test whether the function getopt_long is available.
74 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
75 AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
78 dnl mingw's getopt (in libmingwex.a) does weird things when the options
79 dnl strings starts with '+' and it's not the first call. Some internal state
80 dnl is left over from earlier calls, and neither setting optind = 0 nor
81 dnl setting optreset = 1 get rid of this internal state.
82 dnl POSIX is silent on optind vs. optreset, so we allow either behavior.
83 dnl POSIX 2008 does not specify leading '+' behavior, but see
84 dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
85 dnl the next version of POSIX. For now, we only guarantee leading '+'
86 dnl behavior with getopt-gnu.
87 if test -z "$gl_replace_getopt"; then
88 AC_CACHE_CHECK([whether getopt is POSIX compatible],
89 [gl_cv_func_getopt_posix],
91 dnl BSD getopt_long uses an incompatible method to reset
92 dnl option processing. Existence of the variable, in and of
93 dnl itself, is not a reason to replace getopt, but knowledge
94 dnl of the variable is needed to determine how to reset and
95 dnl whether a reset reparses the environment. Solaris
96 dnl supports neither optreset nor optind=0, but keeps no state
97 dnl that needs a reset beyond setting optind=1; detect Solaris
101 [[#include <unistd.h>]],
102 [[int *p = &optreset; return optreset;]])],
106 [[#include <getopt.h>]],
107 [[return !getopt_clip;]])],
111 dnl This test fails on mingw and succeeds on many other platforms.
112 gl_save_CPPFLAGS=$CPPFLAGS
113 CPPFLAGS="$CPPFLAGS -DOPTIND_MIN=$gl_optind_min"
114 AC_RUN_IFELSE([AC_LANG_SOURCE([[
127 argv[argc++] = "program";
129 argv[argc++] = "foo";
130 argv[argc++] = "bar";
135 c = getopt (argc, argv, "ab");
138 c = getopt (argc, argv, "ab");
144 /* Some internal state exists at this point. */
150 argv[argc++] = "program";
151 argv[argc++] = "donald";
153 argv[argc++] = "billy";
154 argv[argc++] = "duck";
156 argv[argc++] = "bar";
161 c = getopt (argc, argv, "+abp:q:");
164 if (!(strcmp (argv[0], "program") == 0))
166 if (!(strcmp (argv[1], "donald") == 0))
168 if (!(strcmp (argv[2], "-p") == 0))
170 if (!(strcmp (argv[3], "billy") == 0))
172 if (!(strcmp (argv[4], "duck") == 0))
174 if (!(strcmp (argv[5], "-a") == 0))
176 if (!(strcmp (argv[6], "bar") == 0))
181 /* Detect MacOS 10.5, AIX 7.1 bug. */
183 char *argv[3] = { "program", "-ab", NULL };
186 if (getopt (2, argv, "ab:") != 'a')
188 if (getopt (2, argv, "ab:") != '?')
199 [gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
201 mingw*) gl_cv_func_getopt_posix="guessing no";;
202 darwin* | aix*) gl_cv_func_getopt_posix="guessing no";;
203 *) gl_cv_func_getopt_posix="guessing yes";;
206 CPPFLAGS=$gl_save_CPPFLAGS
208 case "$gl_cv_func_getopt_posix" in
209 *no) gl_replace_getopt=yes ;;
213 if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
214 AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
215 [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
216 # optstring is necessary for programs like m4 that have POSIX-mandated
217 # semantics for supporting options interspersed with files.
218 # Also, since getopt_long is a GNU extension, we require optind=0.
219 # Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;
220 # so take care to revert to the correct (non-)export state.
221 dnl GNU Coding Standards currently allow awk but not env; besides, env
222 dnl is ambiguous with environment values that contain newlines.
223 gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
224 case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
225 xx) gl_had_POSIXLY_CORRECT=exported ;;
226 x) gl_had_POSIXLY_CORRECT=yes ;;
227 *) gl_had_POSIXLY_CORRECT= ;;
230 export POSIXLY_CORRECT
232 [AC_LANG_PROGRAM([[#include <getopt.h>
237 /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
238 and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
239 OSF/1 5.1, Solaris 10. */
242 myargv[0] = "conftest";
246 if (getopt (2, myargv, "+a") != '?')
249 /* This code succeeds on glibc 2.8, mingw,
250 and fails on MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
251 IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x. */
253 char *argv[] = { "program", "-p", "foo", "bar", NULL };
256 if (getopt (4, argv, "p::") != 'p')
258 else if (optarg != NULL)
260 else if (getopt (4, argv, "p::") != -1)
262 else if (optind != 2)
265 /* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0. */
267 char *argv[] = { "program", "foo", "-p", NULL };
269 if (getopt (3, argv, "-p") != 1)
271 else if (getopt (3, argv, "-p") != 'p')
274 /* This code fails on glibc 2.11. */
276 char *argv[] = { "program", "-b", "-a", NULL };
278 if (getopt (3, argv, "+:a:b") != 'b')
280 else if (getopt (3, argv, "+:a:b") != ':')
285 [gl_cv_func_getopt_gnu=yes],
286 [gl_cv_func_getopt_gnu=no],
287 [dnl Cross compiling. Guess based on host and declarations.
288 case $host_os:$ac_cv_have_decl_optreset in
289 *-gnu*:* | mingw*:*) gl_cv_func_getopt_gnu=no;;
290 *:yes) gl_cv_func_getopt_gnu=no;;
291 *) gl_cv_func_getopt_gnu=yes;;
294 case $gl_had_POSIXLY_CORRECT in
296 yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;
297 *) AS_UNSET([POSIXLY_CORRECT]) ;;
300 if test "$gl_cv_func_getopt_gnu" = "no"; then
301 gl_replace_getopt=yes
306 # emacs' configure.in uses this.
307 AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
310 AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
311 [Define to rpl_ if the getopt replacement functions and variables
316 # Prerequisites of lib/getopt*.
317 # emacs' configure.in uses this.
318 AC_DEFUN([gl_PREREQ_GETOPT],
320 AC_CHECK_DECLS_ONCE([getenv])