extern int rts_getThreadId(StgPtr tso);
extern int forkOS_createThread ( HsStablePtr entry );
extern StgInt forkProcess(HsStablePtr *entry);
extern int rts_getThreadId(StgPtr tso);
extern int forkOS_createThread ( HsStablePtr entry );
extern StgInt forkProcess(HsStablePtr *entry);