--- config.tests/unix/compile.test.orig	2008-09-27 04:58:41.000000000 -0400
+++ config.tests/unix/compile.test	2008-10-27 00:46:48.000000000 -0400
@@ -32,6 +32,10 @@
         INC=`echo $PARAM | sed -e 's/^-I//'`
         INCLUDEPATH="$INCLUDEPATH $INC"
         ;;
+    -isystem*)
+        INC=`echo $PARAM | sed -e 's/^-isystem//'`
+        INCLUDEPATH="$INCLUDEPATH $INC"
+        ;;
     -f*|-D*)
         CXXFLAGS="$CXXFLAGS $PARAM"
         ;;