$NetBSD: patch-ao,v 1.2 2006/05/29 19:44:24 joerg Exp $

--- Top/threads.c.orig	2005-12-26 09:27:07.000000000 -0800
+++ Top/threads.c
@@ -109,7 +109,7 @@ PUBLIC void csoundSleep(size_t milliseco
     Sleep((DWORD) milliseconds);
 }
 
-#elif defined(LINUX) || defined(__MACH__)
+#elif defined(LINUX) || defined(__MACH__) || defined(__NetBSD__) || defined(__DragonFly__)
 
 #include <pthread.h>
 #include <time.h>