CFLAGS = -I /usr/X11R6/include
LDFLAGS = -L/usr/X11R6/lib -lX11 -lGL

step1:
	gcc -Wall -o step1 step1_start.c $(CFLAGS) $(LDFLAGS)

step2:
	gcc -Wall -o step2 step2_window.c $(CFLAGS) $(LDFLAGS)

step3:
	gcc -Wall -o step3 step3_opengl.c $(CFLAGS) $(LDFLAGS)

clean:
	rm -f step3 step2 step1