-extern void initProfTimer(nat ms);
-extern void stopProfTimer(void);
-extern void startProfTimer(void);
-extern void handleProfTick(void);
+extern void stopProfTimer ( void );
+extern void startProfTimer ( void );
+extern void stopHeapProfTimer ( void );
+extern void startHeapProfTimer ( void );
+
+extern rtsBool performHeapProfile;