C++ Makefile 3 files

Question

I have a makefile problem. I know how to create a makefile for two, but not four different files including header files...

There are four files, main.cpp Dictionary.h Dictionary.cpp and Cinco.h

Cincotest: main.o Cinco.o
    g++ -o p3 main.o Cinco.o

main.o: main.cpp Cinco.h
    g++ -c main.cpp

Dictionary.o: Dictionary.cpp Dictionary.h
    g++ -c .cpp


# clean up
clean:
    rm -f p4 *.o *~

Do we need the other files code or could we get help here??

If you know the answer and could input the new code that would be perfect ;)

Answer 1

It looks to me like a fairly standard way of organizing code - .cpp and a .h header file to go with it.

The rules that you have are sufficient. Unless your main.cpp also #include-s the Dictionary.h header file, or your dictionary.cpp also #include-s the Cinco.h , in which case:

main.o: main.cpp Cinco.h Dictionary.h
    g++ -c main.cpp

Dictionary.o: Dictionary.cpp Cinco.h Dictionary.h
    g++ -c .cpp

A makefile is just a dependency list. For each *.o file, it's dependencies are all the source files needed to compile it. If in your main.cpp you #include Dictionary.h , then a change to Dictionary.h means that main.cpp needs to be recompiled, of course. Therefore, your dependency rule would indicate the same way.

Since you're using g++ , you can also use g++ to write your dependency rules for you. Try:

g++ -MM -MF main.deps main.cpp

See gcc 's man page for more information.