diff -urEbwB raylib-1.7.0/src/Makefile raylib-1.7.0.new/src/Makefile
--- raylib-1.7.0/src/Makefile	2017-05-19 01:02:01.000000000 +0200
+++ raylib-1.7.0.new/src/Makefile	2017-05-29 18:21:55.452829234 +0200
@@ -198,7 +198,7 @@
 #  -fgnu89-inline       declaring inline functions support (GCC optimized)
 #  -Wno-missing-braces  ignore invalid warning (GCC bug 53119)
 #  -D_DEFAULT_SOURCE    use with -std=c99
-CFLAGS = -O1 -Wall -std=c99 -D_DEFAULT_SOURCE -fgnu89-inline -Wno-missing-braces
+CFLAGS += -O1 -Wall -std=c99 -D_DEFAULT_SOURCE -fgnu89-inline -Wno-missing-braces
 
 ifeq ($(PLATFORM),PLATFORM_WEB)
     CFLAGS += -s USE_GLFW=3 -s ASSERTIONS=1 --profiling --preload-file resources