--- xmlsec.orig/config.m4	2006-10-17 16:40:34.000000000 +0400
+++ xmlsec/config.m4	2007-12-03 14:53:17.000000000 +0300
@@ -2,21 +2,25 @@
 dnl $Id: config.m4,v 1.7 2005/12/04 00:20:52 tony2001 Exp $
 dnl
 
-PHP_ARG_ENABLE(xmlsec, whether to enable XMLSec support,
-[  --enable-xmlsec     Enable XMLSec support], no)
+PHP_ARG_WITH(xmlsec, whether to enable XMLSec support,
+[  --with-xmlsec     Enable XMLSec support], no)
 
 if test "$PHP_XMLSEC" != "no"; then
   if test "$PHP_LIBXML" = "no"; then
     AC_MSG_ERROR([XMLSec extension requires LIBXML extension, add --enable-libxml])
   fi
 
-  for i in $PHP_XMLSEC /usr/local /usr; do
+  for i in "$PHP_XMLSEC" /usr/local /usr; do
     if test -x "$i/bin/xmlsec1-config"; then
-      XMLSEC_CONFIG=$i/bin/xmlsec1-config
+      XMLSEC_CONFIG="$i/bin/xmlsec1-config"
       break
     fi
   done
 
+  if -z "$XMLSEC_CONFIG"; then
+    AC_MSG_ERROR([Can't find xmlsec1 library installation])
+  fi
+
   XMLSEC_LIBS=`$XMLSEC_CONFIG --libs`
   XMLSEC_INCS=`$XMLSEC_CONFIG --cflags`
   PHP_EVAL_LIBLINE($XMLSEC_LIBS, XMLSEC_SHARED_LIBADD)