#sample Makefile for using OpenGL 

PROG	= boxes
TOP = /usr/include/GL
CFLAGS  = -w -s -O2 -ansi -DSHM
LIBS    = -lglut -lGLU -lGL 
INCLS   = -I/usr/X11R/include  -I$(TOP)
LIBDIR  = -L/usr/X11/lib -L/usr/X11R6/lib

#source codes
SRCS   = $(PROG).cpp point2.cpp turtle.cpp

#substitute .cpp by .o to obtain object filenames
OBJS   = $(SRCS:.cpp=.o)

#$< evaluates to the target's dependencies, 
#$@ evaluates to the target

$(PROG): $(OBJS)
	g++ -o $@ $(OBJS)  $(LIBDIR) $(LIBS) $(XLIBS)

$(OBJS): 
	g++ -c  $*.cpp $(INCLS) 

clean:
	rm $(OBJS); rm $(PROG) 

