$NetBSD$

Thread priority functions were stubs until 4.99.50.

--- src/unix/threadpsx.cpp.orig	2003-09-21 15:31:40.000000000 +0400
+++ src/unix/threadpsx.cpp
@@ -58,6 +58,13 @@
     #include <sys/resource.h>
 #endif
 
+#ifdef __NetBSD__
+#include <sys/param.h>
+#if __NetBSD_Version__ < 499005000 && defined(HAVE_THREAD_PRIORITY_FUNCTIONS)
+#undef HAVE_THREAD_PRIORITY_FUNCTIONS
+#endif
+#endif
+
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
