-#serial 4
+# serial 55
+
+# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006,
+# 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
dnl Initially derived from code in GNU grep.
dnl Mostly written by Jim Meyering.
-AC_DEFUN(jm_WITH_REGEX,
- [
- AC_REQUIRE([AM_GLIBC])
+AC_PREREQ([2.50])
+
+AC_DEFUN([gl_REGEX],
+[
+ AC_CHECK_HEADERS_ONCE([locale.h])
- dnl Even packages that don't use regex.c can use this macro.
- dnl Of course, for them it doesn't do anything.
+ AC_ARG_WITH([included-regex],
+ [AS_HELP_STRING([--without-included-regex],
+ [don't compile regex; this is the default on systems
+ with recent-enough versions of the GNU C Library
+ (use with caution on other systems).])])
- # By default, don't use the included regex.c on systems with a version
- # of glibc 2 that's new enough to pass the following run test.
+ case $with_included_regex in #(
+ yes|no) ac_use_included_regex=$with_included_regex
+ ;;
+ '')
+ # If the system regex support is good enough that it passes the
+ # following run test, then default to *not* using the included regex.c.
# If cross compiling, assume the test would fail and use the included
- # regex.c. The failing regular expression is from `Spencer ere test
- # #75' in grep-2.2f.
- ac_use_included_regex=yes
-
- if test "$ac_cv_glibc" = yes; then
- # Without this run-test, on older glibc2 systems we'd end up
- # using the buggy system regex.
- AC_CACHE_CHECK([for working re_compile_pattern],
- jm_cv_func_working_re_compile_pattern,
- AC_TRY_RUN(
- changequote(<<, >>)dnl
- <<
-#include <stdio.h>
-#include <regex.h>
- int
- main ()
- {
- static struct re_pattern_buffer regex;
- const char *s;
- re_set_syntax (RE_SYNTAX_POSIX_EGREP);
- /* Add this third left square bracket, [, to balance the
- three right ones below. Otherwise autoconf-2.14 chokes. */
- s = re_compile_pattern ("a[[:]:]]b\n", 9, ®ex);
- /* This should fail with _Invalid character class name_ error. */
- exit (s ? 0 : 1);
- }
- >>,
- changequote([, ])dnl
-
- jm_cv_func_working_re_compile_pattern=yes,
- jm_cv_func_working_re_compile_pattern=no,
- dnl When crosscompiling, assume it's broken.
- jm_cv_func_working_re_compile_pattern=no))
- if test $jm_cv_func_working_re_compile_pattern = yes; then
- ac_use_included_regex=no
- fi
- fi
-
- test -n "$1" || AC_MSG_ERROR([missing argument])
- syscmd([test -f $1])
- ifelse(sysval, 0,
- [
-
- AC_ARG_WITH(included-regex,
- [ --without-included-regex don't compile regex; this is the default on
- systems with version 2 of the GNU C library
- (use with caution on other system)],
- jm_with_regex=$withval,
- jm_with_regex=$ac_use_included_regex)
- if test "$jm_with_regex" = yes; then
- LIBOBJS="$LIBOBJS regex.o"
- fi
- ],
- )
- ]
-)
+ # regex.c.
+ AC_CACHE_CHECK([for working re_compile_pattern],
+ [gl_cv_func_re_compile_pattern_working],
+ [AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM(
+ [AC_INCLUDES_DEFAULT[
+ #if HAVE_LOCALE_H
+ #include <locale.h>
+ #endif
+ #include <limits.h>
+ #include <regex.h>
+ ]],
+ [[static struct re_pattern_buffer regex;
+ unsigned char folded_chars[UCHAR_MAX + 1];
+ int i;
+ const char *s;
+ struct re_registers regs;
+
+ #if HAVE_LOCALE_H
+ /* http://sourceware.org/ml/libc-hacker/2006-09/msg00008.html
+ This test needs valgrind to catch the bug on Debian
+ GNU/Linux 3.1 x86, but it might catch the bug better
+ on other platforms and it shouldn't hurt to try the
+ test here. */
+ if (setlocale (LC_ALL, "en_US.UTF-8"))
+ {
+ static char const pat[] = "insert into";
+ static char const data[] =
+ "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";
+ re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE
+ | RE_ICASE);
+ memset (®ex, 0, sizeof regex);
+ s = re_compile_pattern (pat, sizeof pat - 1, ®ex);
+ if (s)
+ return 1;
+ if (re_search (®ex, data, sizeof data - 1,
+ 0, sizeof data - 1, ®s)
+ != -1)
+ return 1;
+ if (! setlocale (LC_ALL, "C"))
+ return 1;
+ }
+ #endif
+
+ /* This test is from glibc bug 3957, reported by Andrew Mackey. */
+ re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE);
+ memset (®ex, 0, sizeof regex);
+ s = re_compile_pattern ("a[^x]b", 6, ®ex);
+ if (s)
+ return 1;
+
+ /* This should fail, but succeeds for glibc-2.5. */
+ if (re_search (®ex, "a\nb", 3, 0, 3, ®s) != -1)
+ return 1;
+
+ /* This regular expression is from Spencer ere test number 75
+ in grep-2.3. */
+ re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+ memset (®ex, 0, sizeof regex);
+ for (i = 0; i <= UCHAR_MAX; i++)
+ folded_chars[i] = i;
+ regex.translate = folded_chars;
+ s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, ®ex);
+ /* This should fail with _Invalid character class name_ error. */
+ if (!s)
+ return 1;
+
+ /* Ensure that [b-a] is diagnosed as invalid. */
+ re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+ memset (®ex, 0, sizeof regex);
+ s = re_compile_pattern ("a[b-a]", 6, ®ex);
+ if (s == 0)
+ return 1;
+
+ /* This should succeed, but does not for glibc-2.1.3. */
+ memset (®ex, 0, sizeof regex);
+ s = re_compile_pattern ("{1", 2, ®ex);
+
+ if (s)
+ return 1;
+
+ /* The following example is derived from a problem report
+ against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */
+ memset (®ex, 0, sizeof regex);
+ s = re_compile_pattern ("[an\371]*n", 7, ®ex);
+ if (s)
+ return 1;
+
+ /* This should match, but does not for glibc-2.2.1. */
+ if (re_match (®ex, "an", 2, 0, ®s) != 2)
+ return 1;
+
+ memset (®ex, 0, sizeof regex);
+ s = re_compile_pattern ("x", 1, ®ex);
+ if (s)
+ return 1;
+
+ /* glibc-2.2.93 does not work with a negative RANGE argument. */
+ if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1)
+ return 1;
+
+ /* The version of regex.c in older versions of gnulib
+ ignored RE_ICASE. Detect that problem too. */
+ re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
+ memset (®ex, 0, sizeof regex);
+ s = re_compile_pattern ("x", 1, ®ex);
+ if (s)
+ return 1;
+
+ if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0)
+ return 1;
+
+ /* Catch a bug reported by Vin Shelton in
+ http://lists.gnu.org/archive/html/bug-coreutils/2007-06/msg00089.html
+ */
+ re_set_syntax (RE_SYNTAX_POSIX_BASIC
+ & ~RE_CONTEXT_INVALID_DUP
+ & ~RE_NO_EMPTY_RANGES);
+ memset (®ex, 0, sizeof regex);
+ s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, ®ex);
+ if (s)
+ return 1;
+
+ /* REG_STARTEND was added to glibc on 2004-01-15.
+ Reject older versions. */
+ if (! REG_STARTEND)
+ return 1;
+
+ /* Reject hosts whose regoff_t values are too narrow.
+ These include glibc 2.3.5 on hosts with 64-bit ptrdiff_t
+ and 32-bit int. */
+ if (sizeof (regoff_t) < sizeof (ptrdiff_t)
+ || sizeof (regoff_t) < sizeof (ssize_t))
+ return 1;
+
+ return 0;]])],
+ [gl_cv_func_re_compile_pattern_working=yes],
+ [gl_cv_func_re_compile_pattern_working=no],
+ dnl When crosscompiling, assume it is not working.
+ [gl_cv_func_re_compile_pattern_working=no])])
+ case $gl_cv_func_re_compile_pattern_working in #(
+ yes) ac_use_included_regex=no;; #(
+ no) ac_use_included_regex=yes;;
+ esac
+ ;;
+ *) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
+ ;;
+ esac
+
+ if test $ac_use_included_regex = yes; then
+ AC_DEFINE([_REGEX_LARGE_OFFSETS], [1],
+ [Define if you want regoff_t to be at least as wide POSIX requires.])
+ AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
+ [Define to rpl_re_syntax_options if the replacement should be used.])
+ AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],
+ [Define to rpl_re_set_syntax if the replacement should be used.])
+ AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],
+ [Define to rpl_re_compile_pattern if the replacement should be used.])
+ AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],
+ [Define to rpl_re_compile_fastmap if the replacement should be used.])
+ AC_DEFINE([re_search], [rpl_re_search],
+ [Define to rpl_re_search if the replacement should be used.])
+ AC_DEFINE([re_search_2], [rpl_re_search_2],
+ [Define to rpl_re_search_2 if the replacement should be used.])
+ AC_DEFINE([re_match], [rpl_re_match],
+ [Define to rpl_re_match if the replacement should be used.])
+ AC_DEFINE([re_match_2], [rpl_re_match_2],
+ [Define to rpl_re_match_2 if the replacement should be used.])
+ AC_DEFINE([re_set_registers], [rpl_re_set_registers],
+ [Define to rpl_re_set_registers if the replacement should be used.])
+ AC_DEFINE([re_comp], [rpl_re_comp],
+ [Define to rpl_re_comp if the replacement should be used.])
+ AC_DEFINE([re_exec], [rpl_re_exec],
+ [Define to rpl_re_exec if the replacement should be used.])
+ AC_DEFINE([regcomp], [rpl_regcomp],
+ [Define to rpl_regcomp if the replacement should be used.])
+ AC_DEFINE([regexec], [rpl_regexec],
+ [Define to rpl_regexec if the replacement should be used.])
+ AC_DEFINE([regerror], [rpl_regerror],
+ [Define to rpl_regerror if the replacement should be used.])
+ AC_DEFINE([regfree], [rpl_regfree],
+ [Define to rpl_regfree if the replacement should be used.])
+ AC_LIBOBJ([regex])
+ gl_PREREQ_REGEX
+ fi
+])
+
+# Prerequisites of lib/regex.c and lib/regex_internal.c.
+AC_DEFUN([gl_PREREQ_REGEX],
+[
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+ AC_REQUIRE([AC_C_INLINE])
+ AC_REQUIRE([AC_C_RESTRICT])
+ AC_REQUIRE([AC_TYPE_MBSTATE_T])
+ AC_CHECK_HEADERS([libintl.h])
+ AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])
+ AC_CHECK_DECLS([isblank], [], [], [#include <ctype.h>])
+])