diff -r b78a46fe8002 -r c18ed26f016c test/preflow_test.cc
--- a/test/preflow_test.cc	Wed Nov 07 18:10:07 2012 +0100
+++ b/test/preflow_test.cc	Wed Nov 28 11:42:38 2012 +0100
@@ -86,6 +86,7 @@
   CutMap cut;
   VType v;
   bool b;
+  ignore_unused_variable_warning(v,b);
 
   typedef Preflow<Digraph, CapMap>
             ::SetFlowMap<FlowMap>