+#if defined(PAR)
+extern void checkBQ (StgBlockingQueueElement *bqe, StgClosure *closure);
+extern void checkLAGAtable(rtsBool check_closures);
+extern void checkHeapChunk(StgPtr start, StgPtr end);
+#else
+extern void checkBQ (StgTSO *bqe, StgClosure *closure);
+#endif