regex: don't depend on wcscoll

[gnulib.git] / m4 / regex.m4

diff --git a/m4/regex.m4 b/m4/regex.m4
index 944dfaf..424ae33 100644 (file)
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,4 +1,4 @@
-# serial 63
+# serial 64
 
 # Copyright (C) 1996-2001, 2003-2013 Free Software Foundation, Inc.
 #
@@ -27,20 +27,21 @@ AC_DEFUN([gl_REGEX],
     # 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.
-    AC_CHECK_FUNCS_ONCE([alarm])
+    AC_CHECK_DECLS_ONCE([alarm])
     AC_CACHE_CHECK([for working re_compile_pattern],
                    [gl_cv_func_re_compile_pattern_working],
       [AC_RUN_IFELSE(
         [AC_LANG_PROGRAM(
-          [AC_INCLUDES_DEFAULT[
-           #include <locale.h>
-           #include <limits.h>
-           #include <regex.h>
-           #if HAVE_ALARM
-           # include <unistd.h>
-           # include <signal.h>
-           #endif
-           ]],
+          [[#include <regex.h>
+
+            #include <locale.h>
+            #include <limits.h>
+            #include <string.h>
+            #if HAVE_DECL_ALARM
+            # include <unistd.h>
+            # include <signal.h>
+            #endif
+          ]],
           [[int result = 0;
             static struct re_pattern_buffer regex;
             unsigned char folded_chars[UCHAR_MAX + 1];
@@ -48,7 +49,7 @@ AC_DEFUN([gl_REGEX],
             const char *s;
             struct re_registers regs;
 
-#if HAVE_ALARM
+#if HAVE_DECL_ALARM
             /* Some builds of glibc go into an infinite loop on this test.  */
             signal (SIGALRM, SIG_DFL);
             alarm (2);
@@ -83,17 +84,28 @@ AC_DEFUN([gl_REGEX],
                      */
                   static char const pat[] = "[^x]x";
                   static char const data[] =
-                    "\xe1\x80\x80\xe1\x80\xbb\xe1\x80\xbd\xe1\x80\x94\xe1\x80"
-                    "\xba\xe1\x80\xaf\xe1\x80\x95\xe1\x80\xbax";
+                    /* <U1000><U103B><U103D><U1014><U103A><U102F><U1015><U103A> */
+                    "\xe1\x80\x80"
+                    "\xe1\x80\xbb"
+                    "\xe1\x80\xbd"
+                    "\xe1\x80\x94"
+                    "\xe1\x80\xba"
+                    "\xe1\x80\xaf"
+                    "\xe1\x80\x95"
+                    "\xe1\x80\xba"
+                    "x";
                   re_set_syntax (0);
                   memset (&regex, 0, sizeof regex);
                   s = re_compile_pattern (pat, sizeof pat - 1, &regex);
                   if (s)
                     result |= 1;
-                  else if (re_search (&regex, data, sizeof data - 1,
-                                      0, sizeof data - 1, 0)
-                           != 20)
-                    result |= 1;
+                  else
+                    {
+                      i = re_search (&regex, data, sizeof data - 1,
+                                     0, sizeof data - 1, 0);
+                      if (i != 0 && i != 21)
+                        result |= 1;
+                    }
                 }
 
                 if (! setlocale (LC_ALL, "C"))
@@ -254,7 +266,8 @@ AC_DEFUN([gl_PREREQ_REGEX],
   AC_REQUIRE([AC_C_RESTRICT])
   AC_REQUIRE([AC_TYPE_MBSTATE_T])
   AC_REQUIRE([gl_EEMALLOC])
+  AC_REQUIRE([gl_GLIBC21])
   AC_CHECK_HEADERS([libintl.h])
-  AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])
+  AC_CHECK_FUNCS_ONCE([isblank iswctype])
   AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])
 ])