diff -r b78a46fe8002 -r c18ed26f016c test/circulation_test.cc
--- a/test/circulation_test.cc	Wed Nov 07 18:10:07 2012 +0100
+++ b/test/circulation_test.cc	Wed Nov 28 11:42:38 2012 +0100
@@ -73,6 +73,7 @@
   BarrierMap bar;
   VType v;
   bool b;
+  ignore_unused_variable_warning(v,b);
 
   typedef Circulation<Digraph, CapMap, CapMap, SupplyMap>
             ::SetFlowMap<FlowMap>