--- a/gcc.mk	Fri May 17 14:41:44 2013 +0200
+++ b/gcc.mk	Tue May 21 13:19:37 2013 +0200
@@ -27,5 +27,5 @@
 
 CC = gcc
 LD = gcc
-CFLAGS = -Wall -std=gnu99 -O
+CFLAGS = -Wall -std=gnu99 -O2
 LDFLAGS =