Makefile needs CFLAGS.
@@ -7,7 +7,7 @@ PREFIX ?= ./out
.PHONY: all test install clean
all: ge-additions.c ge-additions.h
- $(CC) -O3 -Wall -Werror -pedantic -std=gnu99 -c ge-additions.c
+ $(CC) $(CFLAGS) -O3 -Wall -Werror -pedantic -std=gnu99 -c ge-additions.c
$(AR) rcs libge-additions.a ge-additions.o
install: all
