--- libbpg-0.9.4/Makefile.old	2015-01-07 15:41:29.030598098 -0500
+++ libbpg-0.9.4/Makefile	2015-01-07 15:51:18.146608993 -0500
@@ -36,7 +36,7 @@
 
 PWD:=$(shell pwd)
 
-CFLAGS:=-Os -Wall -MMD -fno-asynchronous-unwind-tables -fdata-sections -ffunction-sections -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -fomit-frame-pointer
+CFLAGS+=-Os -Wall -MMD -fno-asynchronous-unwind-tables -fdata-sections -ffunction-sections -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -fomit-frame-pointer
 CFLAGS+=-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_REENTRANT
 CFLAGS+=-I.
 CFLAGS+=-DCONFIG_BPG_VERSION=\"$(shell cat VERSION)\"