1 | #serial 41
|
---|
2 |
|
---|
3 | # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
|
---|
4 | # 2006 Free Software Foundation, Inc.
|
---|
5 | #
|
---|
6 | # This file is free software; the Free Software Foundation
|
---|
7 | # gives unlimited permission to copy and/or distribute it,
|
---|
8 | # with or without modifications, as long as this notice is preserved.
|
---|
9 |
|
---|
10 | dnl Initially derived from code in GNU grep.
|
---|
11 | dnl Mostly written by Jim Meyering.
|
---|
12 |
|
---|
13 | AC_PREREQ([2.50])
|
---|
14 |
|
---|
15 | AC_DEFUN([gl_REGEX],
|
---|
16 | [
|
---|
17 | AC_CHECK_HEADERS_ONCE([locale.h])
|
---|
18 |
|
---|
19 | AC_ARG_WITH([included-regex],
|
---|
20 | [AC_HELP_STRING([--without-included-regex],
|
---|
21 | [don't compile regex; this is the default on
|
---|
22 | systems with recent-enough versions of the GNU C
|
---|
23 | Library (use with caution on other systems)])])
|
---|
24 |
|
---|
25 | case $with_included_regex in #(
|
---|
26 | yes|no) ac_use_included_regex=$with_included_regex
|
---|
27 | ;;
|
---|
28 | '')
|
---|
29 | # If the system regex support is good enough that it passes the
|
---|
30 | # following run test, then default to *not* using the included regex.c.
|
---|
31 | # If cross compiling, assume the test would fail and use the included
|
---|
32 | # regex.c. The first failing regular expression is from `Spencer ere
|
---|
33 | # test #75' in grep-2.3.
|
---|
34 | AC_CACHE_CHECK([for working re_compile_pattern],
|
---|
35 | [gl_cv_func_re_compile_pattern_working],
|
---|
36 | [AC_RUN_IFELSE(
|
---|
37 | [AC_LANG_PROGRAM(
|
---|
38 | [AC_INCLUDES_DEFAULT
|
---|
39 | #if HAVE_LOCALE_H
|
---|
40 | #include <locale.h>
|
---|
41 | #endif
|
---|
42 | #include <limits.h>
|
---|
43 | #include <regex.h>
|
---|
44 | ],
|
---|
45 | [[static struct re_pattern_buffer regex;
|
---|
46 | unsigned char folded_chars[UCHAR_MAX + 1];
|
---|
47 | int i;
|
---|
48 | const char *s;
|
---|
49 | struct re_registers regs;
|
---|
50 |
|
---|
51 | #if HAVE_LOCALE_H
|
---|
52 | /* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html
|
---|
53 | This test needs valgrind to catch the bug on Debian
|
---|
54 | GNU/Linux 3.1 x86, but it might catch the bug better
|
---|
55 | on other platforms and it shouldn't hurt to try the
|
---|
56 | test here. */
|
---|
57 | if (setlocale (LC_ALL, "en_US.UTF-8"))
|
---|
58 | {
|
---|
59 | static char const pat[] = "insert into";
|
---|
60 | static char const data[] =
|
---|
61 | "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";
|
---|
62 | re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE
|
---|
63 | | RE_ICASE);
|
---|
64 | memset (®ex, 0, sizeof regex);
|
---|
65 | s = re_compile_pattern (pat, sizeof pat - 1, ®ex);
|
---|
66 | if (s)
|
---|
67 | return 1;
|
---|
68 | if (re_search (®ex, data, sizeof data - 1,
|
---|
69 | 0, sizeof data - 1, ®s)
|
---|
70 | != -1)
|
---|
71 | return 1;
|
---|
72 | if (! setlocale (LC_ALL, "C"))
|
---|
73 | return 1;
|
---|
74 | }
|
---|
75 | #endif
|
---|
76 |
|
---|
77 | re_set_syntax (RE_SYNTAX_POSIX_EGREP);
|
---|
78 | memset (®ex, 0, sizeof (regex));
|
---|
79 | for (i = 0; i <= UCHAR_MAX; i++)
|
---|
80 | folded_chars[i] = i;
|
---|
81 | regex.translate = folded_chars;
|
---|
82 | s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, ®ex);
|
---|
83 | /* This should fail with _Invalid character class name_ error. */
|
---|
84 | if (!s)
|
---|
85 | exit (1);
|
---|
86 |
|
---|
87 | /* This should succeed, but does not for e.g. glibc-2.1.3. */
|
---|
88 | memset (®ex, 0, sizeof (regex));
|
---|
89 | s = re_compile_pattern ("{1", 2, ®ex);
|
---|
90 |
|
---|
91 | if (s)
|
---|
92 | exit (1);
|
---|
93 |
|
---|
94 | /* The following example is derived from a problem report
|
---|
95 | against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */
|
---|
96 | memset (®ex, 0, sizeof (regex));
|
---|
97 | s = re_compile_pattern ("[an\371]*n", 7, ®ex);
|
---|
98 | if (s)
|
---|
99 | exit (1);
|
---|
100 |
|
---|
101 | /* This should match, but does not for e.g. glibc-2.2.1. */
|
---|
102 | if (re_match (®ex, "an", 2, 0, ®s) != 2)
|
---|
103 | exit (1);
|
---|
104 |
|
---|
105 | memset (®ex, 0, sizeof (regex));
|
---|
106 | s = re_compile_pattern ("x", 1, ®ex);
|
---|
107 | if (s)
|
---|
108 | exit (1);
|
---|
109 |
|
---|
110 | /* The version of regex.c in e.g. GNU libc-2.2.93 did not
|
---|
111 | work with a negative RANGE argument. */
|
---|
112 | if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1)
|
---|
113 | exit (1);
|
---|
114 |
|
---|
115 | /* The version of regex.c in older versions of gnulib
|
---|
116 | ignored RE_ICASE. Detect that problem too. */
|
---|
117 | memset (®ex, 0, sizeof (regex));
|
---|
118 | re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
|
---|
119 | s = re_compile_pattern ("x", 1, ®ex);
|
---|
120 | if (s)
|
---|
121 | exit (1);
|
---|
122 |
|
---|
123 | if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0)
|
---|
124 | exit (1);
|
---|
125 |
|
---|
126 | /* REG_STARTEND was added to glibc on 2004-01-15.
|
---|
127 | Reject older versions. */
|
---|
128 | if (! REG_STARTEND)
|
---|
129 | exit (1);
|
---|
130 |
|
---|
131 | /* Reject hosts whose regoff_t values are too narrow.
|
---|
132 | These include glibc 2.3.5 on hosts with 64-bit ptrdiff_t
|
---|
133 | and 32-bit int. */
|
---|
134 | if (sizeof (regoff_t) < sizeof (ptrdiff_t)
|
---|
135 | || sizeof (regoff_t) < sizeof (ssize_t))
|
---|
136 | exit (1);
|
---|
137 |
|
---|
138 | exit (0);]])],
|
---|
139 | [gl_cv_func_re_compile_pattern_working=yes],
|
---|
140 | [gl_cv_func_re_compile_pattern_working=no],
|
---|
141 | dnl When crosscompiling, assume it is not working.
|
---|
142 | [gl_cv_func_re_compile_pattern_working=no])])
|
---|
143 | case $gl_cv_func_re_compile_pattern_working in #(
|
---|
144 | yes) ac_use_included_regex=no;; #(
|
---|
145 | no) ac_use_included_regex=yes;;
|
---|
146 | esac
|
---|
147 | ;;
|
---|
148 | *) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
|
---|
149 | ;;
|
---|
150 | esac
|
---|
151 |
|
---|
152 | if test $ac_use_included_regex = yes; then
|
---|
153 | AC_DEFINE([_REGEX_LARGE_OFFSETS], 1,
|
---|
154 | [Define if you want regoff_t to be at least as wide POSIX requires.])
|
---|
155 | AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
|
---|
156 | [Define to rpl_re_syntax_options if the replacement should be used.])
|
---|
157 | AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],
|
---|
158 | [Define to rpl_re_set_syntax if the replacement should be used.])
|
---|
159 | AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],
|
---|
160 | [Define to rpl_re_compile_pattern if the replacement should be used.])
|
---|
161 | AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],
|
---|
162 | [Define to rpl_re_compile_fastmap if the replacement should be used.])
|
---|
163 | AC_DEFINE([re_search], [rpl_re_search],
|
---|
164 | [Define to rpl_re_search if the replacement should be used.])
|
---|
165 | AC_DEFINE([re_search_2], [rpl_re_search_2],
|
---|
166 | [Define to rpl_re_search_2 if the replacement should be used.])
|
---|
167 | AC_DEFINE([re_match], [rpl_re_match],
|
---|
168 | [Define to rpl_re_match if the replacement should be used.])
|
---|
169 | AC_DEFINE([re_match_2], [rpl_re_match_2],
|
---|
170 | [Define to rpl_re_match_2 if the replacement should be used.])
|
---|
171 | AC_DEFINE([re_set_registers], [rpl_re_set_registers],
|
---|
172 | [Define to rpl_re_set_registers if the replacement should be used.])
|
---|
173 | AC_DEFINE([re_comp], [rpl_re_comp],
|
---|
174 | [Define to rpl_re_comp if the replacement should be used.])
|
---|
175 | AC_DEFINE([re_exec], [rpl_re_exec],
|
---|
176 | [Define to rpl_re_exec if the replacement should be used.])
|
---|
177 | AC_DEFINE([regcomp], [rpl_regcomp],
|
---|
178 | [Define to rpl_regcomp if the replacement should be used.])
|
---|
179 | AC_DEFINE([regexec], [rpl_regexec],
|
---|
180 | [Define to rpl_regexec if the replacement should be used.])
|
---|
181 | AC_DEFINE([regerror], [rpl_regerror],
|
---|
182 | [Define to rpl_regerror if the replacement should be used.])
|
---|
183 | AC_DEFINE([regfree], [rpl_regfree],
|
---|
184 | [Define to rpl_regfree if the replacement should be used.])
|
---|
185 | AC_LIBOBJ([regex])
|
---|
186 | gl_PREREQ_REGEX
|
---|
187 | fi
|
---|
188 | ])
|
---|
189 |
|
---|
190 | # Prerequisites of lib/regex.c and lib/regex_internal.c.
|
---|
191 | AC_DEFUN([gl_PREREQ_REGEX],
|
---|
192 | [
|
---|
193 | AC_REQUIRE([AC_GNU_SOURCE])
|
---|
194 | AC_REQUIRE([AC_C_RESTRICT])
|
---|
195 | AC_REQUIRE([AM_LANGINFO_CODESET])
|
---|
196 | AC_CHECK_HEADERS_ONCE([wchar.h wctype.h])
|
---|
197 | AC_CHECK_FUNCS_ONCE([iswctype mbrtowc mempcpy wcrtomb wcscoll])
|
---|
198 | AC_CHECK_DECLS([isblank], [], [], [#include <ctype.h>])
|
---|
199 | ])
|
---|