X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fregex.m4;h=08438f4b9e25a64f85c974a482b77106250b72ba;hb=dddcf3802e07d5154e63f335885ebac67e25e0a3;hp=1a84281f0e8c40220af58885b3f9d24fc9f6ea17;hpb=27ef3b8633ec7b4aba91535ec51c43f39b42a25a;p=gnulib.git

diff --git a/m4/regex.m4 b/m4/regex.m4
index 1a84281f0..08438f4b9 100644
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,4 +1,4 @@
-#serial 8
+#serial 9
 
 dnl Initially derived from code in GNU grep.
 dnl Mostly written by Jim Meyering.
@@ -28,6 +28,7 @@ AC_DEFUN(jm_INCLUDED_REGEX,
 	  {
 	    static struct re_pattern_buffer regex;
 	    const char *s;
+	    struct re_registers regs;
 	    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.  */
@@ -39,7 +40,20 @@ AC_DEFUN(jm_INCLUDED_REGEX,
 	    /* This should succeed, but doesn't for e.g. glibc-2.1.3.  */
 	    s = re_compile_pattern ("{1", 2, &regex);
 
-	    exit (s ? 1 : 0);
+	    if (s)
+	      exit (1);
+
+	    /* The following example is derived from a problem report
+               against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
+	    s = re_compile_pattern ("[anù]*n", 7, &regex);
+	    if (s)
+	      exit (1);
+
+	    /* This should match, but doesn't for e.g. glibc-2.2.1.  */
+	    if (re_match (&regex, "an", 2, 0, &regs) != 2)
+	      exit (1);
+
+	    exit (0);
 	  }
 	],
 	       jm_cv_func_working_re_compile_pattern=yes,
@@ -51,10 +65,9 @@ AC_DEFUN(jm_INCLUDED_REGEX,
     fi
 
     test -n "$1" || AC_MSG_ERROR([missing argument])
-    syscmd([test -f $1])
-    ifelse(sysval, 0,
+    m4_syscmd([test -f $1])
+    ifelse(m4_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