--- mono-1.9.1/mono/mini/main.c	2007-11-08 23:07:34.000000000 +0100
+++ mono-1.9.1-gil/mono/mini/main.c	2008-07-16 20:35:09.000000000 +0200
@@ -1,8 +1,15 @@
 #include "mini.h"
+#include <sched.h>
 
 int
 main (int argc, char* argv[])
 {
+	/* On PowerPC call sched_setaffinity to bind to one CPU only
+     * to work around parallelism bug on G5 SMP */
+    #ifdef __powerpc__
+    unsigned long mask = 1;
+    sched_setaffinity(0, sizeof(mask), &mask);
+    #endif
 	return mono_main (argc, argv);
 }