regex.m4@ 3627

Last change on this file since 3627 was 2595, checked in by bird, 13 years ago
gnu grep version 2.12 (grep-2.12.tar.xz, md5sum=8d2f0346d08b13c18afb81f0e8aa1e2f)
File size: 9.4 KB

Line
1	# serial 61
2
3	# Copyright (C) 1996-2001, 2003-2012 Free Software Foundation, Inc.
4	#
5	# This file is free software; the Free Software Foundation
6	# gives unlimited permission to copy and/or distribute it,
7	# with or without modifications, as long as this notice is preserved.
8
9	dnl Initially derived from code in GNU grep.
10	dnl Mostly written by Jim Meyering.
11
12	AC_PREREQ([2.50])
13
14	AC_DEFUN([gl_REGEX],
15	[
16	AC_ARG_WITH([included-regex],
17	[AS_HELP_STRING([--without-included-regex],
18	[don't compile regex; this is the default on systems
19	with recent-enough versions of the GNU C Library
20	(use with caution on other systems).])])
21
22	case $with_included_regex in #(
23	yes\|no) ac_use_included_regex=$with_included_regex
24	;;
25	'')
26	# If the system regex support is good enough that it passes the
27	# following run test, then default to not using the included regex.c.
28	# If cross compiling, assume the test would fail and use the included
29	# regex.c.
30	AC_CACHE_CHECK([for working re_compile_pattern],
31	[gl_cv_func_re_compile_pattern_working],
32	[AC_RUN_IFELSE(
33	[AC_LANG_PROGRAM(
34	[AC_INCLUDES_DEFAULT[
35	#include <locale.h>
36	#include <limits.h>
37	#include <regex.h>
38	]],
39	[[int result = 0;
40	static struct re_pattern_buffer regex;
41	unsigned char folded_chars[UCHAR_MAX + 1];
42	int i;
43	const char *s;
44	struct re_registers regs;
45
46	/* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html
47	This test needs valgrind to catch the bug on Debian
48	GNU/Linux 3.1 x86, but it might catch the bug better
49	on other platforms and it shouldn't hurt to try the
50	test here. */
51	if (setlocale (LC_ALL, "en_US.UTF-8"))
52	{
53	static char const pat[] = "insert into";
54	static char const data[] =
55	"\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";
56	re_set_syntax (RE_SYNTAX_GREP \| RE_HAT_LISTS_NOT_NEWLINE
57	\| RE_ICASE);
58	memset (&regex, 0, sizeof regex);
59	s = re_compile_pattern (pat, sizeof pat - 1, &regex);
60	if (s)
61	result \|= 1;
62	else if (re_search (&regex, data, sizeof data - 1,
63	0, sizeof data - 1, &regs)
64	!= -1)
65	result \|= 1;
66	if (! setlocale (LC_ALL, "C"))
67	return 1;
68	}
69
70	/* This test is from glibc bug 3957, reported by Andrew Mackey. */
71	re_set_syntax (RE_SYNTAX_EGREP \| RE_HAT_LISTS_NOT_NEWLINE);
72	memset (&regex, 0, sizeof regex);
73	s = re_compile_pattern ("a[^x]b", 6, &regex);
74	if (s)
75	result \|= 2;
76	/* This should fail, but succeeds for glibc-2.5. */
77	else if (re_search (&regex, "a\nb", 3, 0, 3, &regs) != -1)
78	result \|= 2;
79
80	/* This regular expression is from Spencer ere test number 75
81	in grep-2.3. */
82	re_set_syntax (RE_SYNTAX_POSIX_EGREP);
83	memset (&regex, 0, sizeof regex);
84	for (i = 0; i <= UCHAR_MAX; i++)
85	folded_chars[i] = i;
86	regex.translate = folded_chars;
87	s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, &regex);
88	/* This should fail with _Invalid character class name_ error. */
89	if (!s)
90	result \|= 4;
91
92	/* Ensure that [b-a] is diagnosed as invalid, when
93	using RE_NO_EMPTY_RANGES. */
94	re_set_syntax (RE_SYNTAX_POSIX_EGREP \| RE_NO_EMPTY_RANGES);
95	memset (&regex, 0, sizeof regex);
96	s = re_compile_pattern ("a[b-a]", 6, &regex);
97	if (s == 0)
98	result \|= 8;
99
100	/* This should succeed, but does not for glibc-2.1.3. */
101	memset (&regex, 0, sizeof regex);
102	s = re_compile_pattern ("{1", 2, &regex);
103	if (s)
104	result \|= 8;
105
106	/* The following example is derived from a problem report
107	against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */
108	memset (&regex, 0, sizeof regex);
109	s = re_compile_pattern ("[an\371]*n", 7, &regex);
110	if (s)
111	result \|= 8;
112	/* This should match, but does not for glibc-2.2.1. */
113	else if (re_match (&regex, "an", 2, 0, &regs) != 2)
114	result \|= 8;
115
116	memset (&regex, 0, sizeof regex);
117	s = re_compile_pattern ("x", 1, &regex);
118	if (s)
119	result \|= 8;
120	/* glibc-2.2.93 does not work with a negative RANGE argument. */
121	else if (re_search (&regex, "wxy", 3, 2, -2, &regs) != 1)
122	result \|= 8;
123
124	/* The version of regex.c in older versions of gnulib
125	ignored RE_ICASE. Detect that problem too. */
126	re_set_syntax (RE_SYNTAX_EMACS \| RE_ICASE);
127	memset (&regex, 0, sizeof regex);
128	s = re_compile_pattern ("x", 1, &regex);
129	if (s)
130	result \|= 16;
131	else if (re_search (&regex, "WXY", 3, 0, 3, &regs) < 0)
132	result \|= 16;
133
134	/* Catch a bug reported by Vin Shelton in
135	http://lists.gnu.org/archive/html/bug-coreutils/2007-06/msg00089.html
136	*/
137	re_set_syntax (RE_SYNTAX_POSIX_BASIC
138	& ~RE_CONTEXT_INVALID_DUP
139	& ~RE_NO_EMPTY_RANGES);
140	memset (&regex, 0, sizeof regex);
141	s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, &regex);
142	if (s)
143	result \|= 32;
144
145	/* REG_STARTEND was added to glibc on 2004-01-15.
146	Reject older versions. */
147	if (! REG_STARTEND)
148	result \|= 64;
149
150	#if 0
151	/* It would be nice to reject hosts whose regoff_t values are too
152	narrow (including glibc on hosts with 64-bit ptrdiff_t and
153	32-bit int), but we should wait until glibc implements this
154	feature. Otherwise, support for equivalence classes and
155	multibyte collation symbols would always be broken except
156	when compiling --without-included-regex. */
157	if (sizeof (regoff_t) < sizeof (ptrdiff_t)
158	\|\| sizeof (regoff_t) < sizeof (ssize_t))
159	result \|= 64;
160	#endif
161
162	return result;
163	]])],
164	[gl_cv_func_re_compile_pattern_working=yes],
165	[gl_cv_func_re_compile_pattern_working=no],
166	dnl When crosscompiling, assume it is not working.
167	[gl_cv_func_re_compile_pattern_working=no])])
168	case $gl_cv_func_re_compile_pattern_working in #(
169	yes) ac_use_included_regex=no;; #(
170	no) ac_use_included_regex=yes;;
171	esac
172	;;
173	*) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
174	;;
175	esac
176
177	if test $ac_use_included_regex = yes; then
178	AC_DEFINE([_REGEX_INCLUDE_LIMITS_H], [1],
179	[Define if you want <regex.h> to include <limits.h>, so that it
180	consistently overrides <limits.h>'s RE_DUP_MAX.])
181	AC_DEFINE([_REGEX_LARGE_OFFSETS], [1],
182	[Define if you want regoff_t to be at least as wide POSIX requires.])
183	AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
184	[Define to rpl_re_syntax_options if the replacement should be used.])
185	AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],
186	[Define to rpl_re_set_syntax if the replacement should be used.])
187	AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],
188	[Define to rpl_re_compile_pattern if the replacement should be used.])
189	AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],
190	[Define to rpl_re_compile_fastmap if the replacement should be used.])
191	AC_DEFINE([re_search], [rpl_re_search],
192	[Define to rpl_re_search if the replacement should be used.])
193	AC_DEFINE([re_search_2], [rpl_re_search_2],
194	[Define to rpl_re_search_2 if the replacement should be used.])
195	AC_DEFINE([re_match], [rpl_re_match],
196	[Define to rpl_re_match if the replacement should be used.])
197	AC_DEFINE([re_match_2], [rpl_re_match_2],
198	[Define to rpl_re_match_2 if the replacement should be used.])
199	AC_DEFINE([re_set_registers], [rpl_re_set_registers],
200	[Define to rpl_re_set_registers if the replacement should be used.])
201	AC_DEFINE([re_comp], [rpl_re_comp],
202	[Define to rpl_re_comp if the replacement should be used.])
203	AC_DEFINE([re_exec], [rpl_re_exec],
204	[Define to rpl_re_exec if the replacement should be used.])
205	AC_DEFINE([regcomp], [rpl_regcomp],
206	[Define to rpl_regcomp if the replacement should be used.])
207	AC_DEFINE([regexec], [rpl_regexec],
208	[Define to rpl_regexec if the replacement should be used.])
209	AC_DEFINE([regerror], [rpl_regerror],
210	[Define to rpl_regerror if the replacement should be used.])
211	AC_DEFINE([regfree], [rpl_regfree],
212	[Define to rpl_regfree if the replacement should be used.])
213	fi
214	])
215
216	# Prerequisites of lib/regex.c and lib/regex_internal.c.
217	AC_DEFUN([gl_PREREQ_REGEX],
218	[
219	AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
220	AC_REQUIRE([AC_C_INLINE])
221	AC_REQUIRE([AC_C_RESTRICT])
222	AC_REQUIRE([AC_TYPE_MBSTATE_T])
223	AC_CHECK_HEADERS([libintl.h])
224	AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])
225	AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])
226	])

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source: kBuild/vendor/grep/2.12/m4/regex.m4@ 3627

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