--- a/Makefile	Fri Nov 16 10:25:12 2007 +0100
+++ b/Makefile	Sat Nov 17 17:20:36 2007 +0100
@@ -1,4 +1,4 @@
-CCFLAGS=-Wall -O3 -I./src
+CCFLAGS=-Wall -O3 -I./src -DPTHREADS -pthread -fno-strict-aliasing
 LDFLAGS=
 
 ifeq ($(OS), Windows_NT)
@@ -10,7 +10,7 @@
   MODULENAME=raytracermodule.so
 endif
 
-# optimisations
+# optimizations
 #CCFLAGS+=-pipe -fomit-frame-pointer -ffast-math -msse3