Thread: Question About Makefiles

  1. #1
    Registered User
    Join Date
    Oct 2002
    Posts
    5

    Question About Makefiles

    How would I create a makefile with three .cc files? Would something like this be right?

    Code:
     
    Prog1: main.o Rational.o test.o
            g++ -Wall -W -Werror main.o Rational.o test.o -o Prog1 
    
    
    main.o: main.cc Rational.h
            g++ -Wall -W -Werror -c main.cc -o Rational.o
    
    Rational.o: Rational.cc Rational.h
            g++ -Wall -W -Werror -c Rational.cc -o Rational.o
    
    test.o: test.cc Rational.h
            g++ -Wall -W -Werror -c test.cc -o test.o
    I appreciate any help and input.

  2. #2
    Registered User
    Join Date
    Aug 2001
    Posts
    244
    Code:
    Prog1: main.o Rational.o test.o
            g++ -Wall -W -Werror main.o Rational.o test.o -o Prog1 
    
    
    main.o: main.cc Rational.h
            g++ -Wall -W -Werror -c main.cc 
    
    Rational.o: Rational.cc Rational.h
            g++ -Wall -W -Werror -c Rational.cc
    
    test.o: test.cc Rational.h
            g++ -Wall -W -Werror -c test.cc

  3. #3
    Registered User
    Join Date
    Sep 2002
    Posts
    69
    You might like to use variables at the top of the file so you don't have to change everything in every line. Just makes neater code.

    Example:

    Code:
    CFLAGS=-W -Wall -ggdb `sdl-config --cflags`
    LIBS=-lm `sdl-config --libs`
    OBJS=main.o particle.o background.o resources.o
    CC=g++
    
    default:
    	@echo 'Plese check the variables at the top of the Makefile, then run make program.'
    
    clean:
    	rm -f program $(OBJS)
    	rm -f *~
    
    program:	$(OBJS)
    	$(CC) $(CFLAGS) $(OBJS) -o program $(LIBS)
    
    main.o:	 main.cpp gamedefs.h
    	$(CC) $(CFLAGS) -c main.cpp
    
    particle.o: particle.cpp particle.h gamedefs.h
    	$(CC) $(CFLAGS) -c particle.cpp
    
    background.o: background.cpp background.h gamedefs.h
    	$(CC) $(CFLAGS) -c background.cpp
    
    resources.o: resources.cpp resources.h gamedefs.h
    	$(CC) $(CFLAGS) -c resources.cpp
    That's hopefully helpful. Sorry if it isn't. I know that three modules isn't anything big, but later on, this would save a lot of time.
    D. Olson
    The Mandrake eXPerience
    Battle Pong

    IDE: kate 2.0
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