diff -r 870f22de388b -r e15eb10f1703 project_files/hwc/rtl/system.c
--- a/project_files/hwc/rtl/system.c	Wed Apr 20 14:46:04 2016 -0400
+++ b/project_files/hwc/rtl/system.c	Wed Apr 20 23:49:37 2016 -0400
@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <wchar.h>
+#include "pmath.h"
 
 #ifndef M_PI
 // some math.h do not have M_PI macros