--- a/clang.mk	Sat Oct 07 09:31:40 2017 +0200
+++ b/clang.mk	Sat Oct 07 09:56:25 2017 +0200
@@ -31,7 +31,7 @@
 AR = ar
 RM = rm
 
-CFLAGS  = -g -c -D_FILE_OFFSET_BITS=64
+CFLAGS  = -O2 -c -D_FILE_OFFSET_BITS=64
 COFLAGS = -o
 LDFLAGS = 
 LOFLAGS = -o