--- src/Makefile.in.orig	Fri Apr 22 09:41:23 2016
+++ src/Makefile.in	Fri Apr 22 09:41:25 2016
@@ -208,7 +208,6 @@ INCLUDES = \
 
 AM_CFLAGS = \
 	-Wall -fno-strict-aliasing\
-	-O4\
 	-DWITH_GCONF\
 	-DDCRAW_NOMAIN\
 	-DDCRAW_NOLCMS\