$OpenBSD: patch-mono_mini_main_c,v 1.9 2019/09/19 12:02:59 thfr Exp $
Index: mono/mini/main.c
--- mono/mini/main.c.orig
+++ mono/mini/main.c
@@ -396,10 +396,14 @@ main (void)
 }
 
 #else
-
+#include <sched.h>
 int
 main (int argc, char* argv[])
 {
+#if defined(__powerpc__) && defined (__GLIBC__)
+  unsigned long mask = 1;
+  sched_setaffinity(0, sizeof(mask), &mask);
+#endif
 	mono_build_date = build_date;
 
 	probe_embedded (argv [0], &argc, &argv);
