*** src/motion/motion_smp.h.old	2009-06-03 12:33:44 
--- src/motion/motion_smp.h	2009-06-03 12:35:24 
***************
*** 45,50 ****
--- 45,56 ----
  	return r;
  }
  
+ #elif defined(__amigaos4__)
+ 
+ # include <pthread.h>
+ # include <proto/dos.h>
+ # define sched_yield() IDOS->Delay(1)
+ 
  #elif defined(SYS_BEOS)
  
  # include <kernel/OS.h>