3 # Copyright (C) 1996-2001, 2003-2013 Free Software Foundation, Inc.
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.
9 dnl Initially derived from code in GNU grep.
10 dnl Mostly written by Jim Meyering.
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).])])
22 case $with_included_regex in #(
23 yes|no) ac_use_included_regex=$with_included_regex
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
30 AC_CACHE_CHECK([for working re_compile_pattern],
31 [gl_cv_func_re_compile_pattern_working],
40 static struct re_pattern_buffer regex;
41 unsigned char folded_chars[UCHAR_MAX + 1];
44 struct re_registers regs;
46 if (setlocale (LC_ALL, "en_US.UTF-8"))
49 /* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html
50 This test needs valgrind to catch the bug on Debian
51 GNU/Linux 3.1 x86, but it might catch the bug better
52 on other platforms and it shouldn't hurt to try the
54 static char const pat[] = "insert into";
55 static char const data[] =
56 "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";
57 re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE
59 memset (®ex, 0, sizeof regex);
60 s = re_compile_pattern (pat, sizeof pat - 1, ®ex);
63 else if (re_search (®ex, data, sizeof data - 1,
64 0, sizeof data - 1, ®s)
70 /* This test is from glibc bug 15078.
71 The test case is from Andreas Schwab in
72 <http://www.sourceware.org/ml/libc-alpha/2013-01/msg00967.html>.
74 static char const pat[] = "[^x]x";
75 static char const data[] =
76 "\xe1\x80\x80\xe1\x80\xbb\xe1\x80\xbd\xe1\x80\x94\xe1\x80"
77 "\xba\xe1\x80\xaf\xe1\x80\x95\xe1\x80\xbax";
79 memset (®ex, 0, sizeof regex);
80 s = re_compile_pattern (pat, sizeof pat - 1, ®ex);
83 else if (re_search (®ex, data, sizeof data - 1,
84 0, sizeof data - 1, 0)
89 if (! setlocale (LC_ALL, "C"))
93 /* This test is from glibc bug 3957, reported by Andrew Mackey. */
94 re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE);
95 memset (®ex, 0, sizeof regex);
96 s = re_compile_pattern ("a[^x]b", 6, ®ex);
99 /* This should fail, but succeeds for glibc-2.5. */
100 else if (re_search (®ex, "a\nb", 3, 0, 3, ®s) != -1)
103 /* This regular expression is from Spencer ere test number 75
105 re_set_syntax (RE_SYNTAX_POSIX_EGREP);
106 memset (®ex, 0, sizeof regex);
107 for (i = 0; i <= UCHAR_MAX; i++)
109 regex.translate = folded_chars;
110 s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, ®ex);
111 /* This should fail with _Invalid character class name_ error. */
115 /* Ensure that [b-a] is diagnosed as invalid, when
116 using RE_NO_EMPTY_RANGES. */
117 re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES);
118 memset (®ex, 0, sizeof regex);
119 s = re_compile_pattern ("a[b-a]", 6, ®ex);
123 /* This should succeed, but does not for glibc-2.1.3. */
124 memset (®ex, 0, sizeof regex);
125 s = re_compile_pattern ("{1", 2, ®ex);
129 /* The following example is derived from a problem report
130 against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */
131 memset (®ex, 0, sizeof regex);
132 s = re_compile_pattern ("[an\371]*n", 7, ®ex);
135 /* This should match, but does not for glibc-2.2.1. */
136 else if (re_match (®ex, "an", 2, 0, ®s) != 2)
139 memset (®ex, 0, sizeof regex);
140 s = re_compile_pattern ("x", 1, ®ex);
143 /* glibc-2.2.93 does not work with a negative RANGE argument. */
144 else if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1)
147 /* The version of regex.c in older versions of gnulib
148 ignored RE_ICASE. Detect that problem too. */
149 re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
150 memset (®ex, 0, sizeof regex);
151 s = re_compile_pattern ("x", 1, ®ex);
154 else if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0)
157 /* Catch a bug reported by Vin Shelton in
158 http://lists.gnu.org/archive/html/bug-coreutils/2007-06/msg00089.html
160 re_set_syntax (RE_SYNTAX_POSIX_BASIC
161 & ~RE_CONTEXT_INVALID_DUP
162 & ~RE_NO_EMPTY_RANGES);
163 memset (®ex, 0, sizeof regex);
164 s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, ®ex);
168 /* REG_STARTEND was added to glibc on 2004-01-15.
169 Reject older versions. */
174 /* It would be nice to reject hosts whose regoff_t values are too
175 narrow (including glibc on hosts with 64-bit ptrdiff_t and
176 32-bit int), but we should wait until glibc implements this
177 feature. Otherwise, support for equivalence classes and
178 multibyte collation symbols would always be broken except
179 when compiling --without-included-regex. */
180 if (sizeof (regoff_t) < sizeof (ptrdiff_t)
181 || sizeof (regoff_t) < sizeof (ssize_t))
187 [gl_cv_func_re_compile_pattern_working=yes],
188 [gl_cv_func_re_compile_pattern_working=no],
189 dnl When crosscompiling, assume it is not working.
190 [gl_cv_func_re_compile_pattern_working=no])])
191 case $gl_cv_func_re_compile_pattern_working in #(
192 yes) ac_use_included_regex=no;; #(
193 no) ac_use_included_regex=yes;;
196 *) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
200 if test $ac_use_included_regex = yes; then
201 AC_DEFINE([_REGEX_INCLUDE_LIMITS_H], [1],
202 [Define if you want <regex.h> to include <limits.h>, so that it
203 consistently overrides <limits.h>'s RE_DUP_MAX.])
204 AC_DEFINE([_REGEX_LARGE_OFFSETS], [1],
205 [Define if you want regoff_t to be at least as wide POSIX requires.])
206 AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
207 [Define to rpl_re_syntax_options if the replacement should be used.])
208 AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],
209 [Define to rpl_re_set_syntax if the replacement should be used.])
210 AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],
211 [Define to rpl_re_compile_pattern if the replacement should be used.])
212 AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],
213 [Define to rpl_re_compile_fastmap if the replacement should be used.])
214 AC_DEFINE([re_search], [rpl_re_search],
215 [Define to rpl_re_search if the replacement should be used.])
216 AC_DEFINE([re_search_2], [rpl_re_search_2],
217 [Define to rpl_re_search_2 if the replacement should be used.])
218 AC_DEFINE([re_match], [rpl_re_match],
219 [Define to rpl_re_match if the replacement should be used.])
220 AC_DEFINE([re_match_2], [rpl_re_match_2],
221 [Define to rpl_re_match_2 if the replacement should be used.])
222 AC_DEFINE([re_set_registers], [rpl_re_set_registers],
223 [Define to rpl_re_set_registers if the replacement should be used.])
224 AC_DEFINE([re_comp], [rpl_re_comp],
225 [Define to rpl_re_comp if the replacement should be used.])
226 AC_DEFINE([re_exec], [rpl_re_exec],
227 [Define to rpl_re_exec if the replacement should be used.])
228 AC_DEFINE([regcomp], [rpl_regcomp],
229 [Define to rpl_regcomp if the replacement should be used.])
230 AC_DEFINE([regexec], [rpl_regexec],
231 [Define to rpl_regexec if the replacement should be used.])
232 AC_DEFINE([regerror], [rpl_regerror],
233 [Define to rpl_regerror if the replacement should be used.])
234 AC_DEFINE([regfree], [rpl_regfree],
235 [Define to rpl_regfree if the replacement should be used.])
239 # Prerequisites of lib/regex.c and lib/regex_internal.c.
240 AC_DEFUN([gl_PREREQ_REGEX],
242 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
243 AC_REQUIRE([AC_C_INLINE])
244 AC_REQUIRE([AC_C_RESTRICT])
245 AC_REQUIRE([AC_TYPE_MBSTATE_T])
246 AC_REQUIRE([gl_EEMALLOC])
247 AC_CHECK_HEADERS([libintl.h])
248 AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])
249 AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])