--- configure	2008-12-22 21:04:01.560845354 +0100
+++ configure	2008-12-22 21:14:01.224845339 +0100
@@ -25656,10 +25656,7 @@ $as_echo "$as_me: error: Could not find 
   { $as_echo "$as_me:$LINENO: checking bison version $bison_version >= $bison_min_version" >&5
 $as_echo_n "checking bison version $bison_version >= $bison_min_version... " >&6; }
 
-  if perl -w <<EOF
-    exit ($bison_version < $bison_min_version) ? 0 : 1;
-EOF
-  then
+  if perl -we "exit ((v$bison_version ge v$bison_min_version) ? 0 : 1)"; then
     { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
   else