X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fregex.m4;h=43b04638c2ebcbdf9a5c5ab207e07b5c59570ccd;hb=2f23fbb2ce253697930e8f769e13134f9be81363;hp=f694bac842302035de1233a5c5bb78c930e71fe5;hpb=237d6da6ea912f61169d7587f968284bf6074ec7;p=gnulib.git

diff --git a/m4/regex.m4 b/m4/regex.m4
index f694bac84..43b04638c 100644
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,7 +1,7 @@
-#serial 44
+# serial 53
 
 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
-# 2006, 2007 Free Software Foundation, Inc.
+# 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -17,10 +17,13 @@ AC_DEFUN([gl_REGEX],
   AC_CHECK_HEADERS_ONCE([locale.h])
 
   AC_ARG_WITH([included-regex],
-    [AC_HELP_STRING([--without-included-regex],
-		    [don't compile regex; this is the default on
+    [AS_HELP_STRING([--without-included-regex],
+		    [don't compile regex; this is the default on 32-bit
 		     systems with recent-enough versions of the GNU C
-		     Library (use with caution on other systems)])])
+		     Library (use with caution on other systems).
+		     On systems with 64-bit ptrdiff_t and 32-bit int,
+		     --with-included-regex is the default, in case
+		     regex functions operate on very long strings (>2GB)])])
 
   case $with_included_regex in #(
   yes|no) ac_use_included_regex=$with_included_regex
@@ -34,13 +37,13 @@ AC_DEFUN([gl_REGEX],
 		   [gl_cv_func_re_compile_pattern_working],
       [AC_RUN_IFELSE(
 	[AC_LANG_PROGRAM(
-	  [AC_INCLUDES_DEFAULT
+	  [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;
@@ -134,6 +137,17 @@ AC_DEFUN([gl_REGEX],
 	    if (re_search (&regex, "WXY", 3, 0, 3, &regs) < 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 (&regex, 0, sizeof regex);
+	    s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, &regex);
+	    if (s)
+	      return 1;
+
 	    /* REG_STARTEND was added to glibc on 2004-01-15.
 	       Reject older versions.  */
 	    if (! REG_STARTEND)
@@ -161,7 +175,7 @@ AC_DEFUN([gl_REGEX],
   esac
 
   if test $ac_use_included_regex = yes; then
-    AC_DEFINE([_REGEX_LARGE_OFFSETS], 1,
+    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.])
@@ -201,9 +215,10 @@ AC_DEFUN([gl_REGEX],
 # Prerequisites of lib/regex.c and lib/regex_internal.c.
 AC_DEFUN([gl_PREREQ_REGEX],
 [
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
   AC_REQUIRE([AC_C_RESTRICT])
-  AC_REQUIRE([AM_LANGINFO_CODESET])
-  AC_CHECK_FUNCS_ONCE([iswctype mbrtowc wcrtomb wcscoll])
+  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>])
 ])