-#if defined ( POSIX_THREADS )
-
-#ifdef HAVE_SCHED_YIELD
-#ifdef HAVE_SCHED_H
-#include <sched.h>
-#endif /* HAVE_SCHED_H */
-
-/* POSIX Threads (final) does have a pthread_yield function */
-void pthread_yield( void )
-{
- sched_yield();
-}
-
-#endif /* HAVE_SCHED_YIELD */
-
-#endif /* posix threads */
-#endif /* dce pthreads */
-#endif /* mit pthreads */
-#endif /* sunos5 lwp */
-#endif /* sunos4 lwp */
-
-#ifndef _THREAD
-