C Language Development in Linux (prepared by makefile) 02

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ForProgramFor the designer, makefile is a hurdle we cannot go around. It may be difficult for users who are used to Visual C ++ to write makefiles. After all, the tool itself has helped us complete all the compilation procedures. But in Linux, everything has changed. No one will do it for you. EditingCodeIt depends on you, test depends on you, and the final automated compilation design depends on you. Think about it. If you download an open-source software but fail to automate the compilation, it will greatly damage your self-confidence in learning the code. So I understand this. We must learn to write makefile, at least the simplest makefile.

First, write the Add. c file,

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2. # Include "test. H"
4. # Include <stdio. h>
8. IntAdd (IntA,IntB)
10. {
12. ReturnA + B;
14. }
18. IntMain ()
20. {
22. Printf ("2 + 3 = % d \ n", Add (2, 3 ));
24. Printf ("2-3 = % d \ n", Sub (2, 3 ));
26. Return1;
28. }

Write the sub. c file,

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1. # Include "test. H"
3. IntSub (IntA,IntB)
4. {
5. ReturnA-B;
6. }

Finally, write the test. h file,

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1. # Ifndef _ test_h
2. # DEFINE _ test_h
4. IntAdd (IntA,IntB );
5. IntSub (IntA,IntB );
6. # Endif

So how can we write makefile for these three simple files?

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1. test: Add. O sub. O
2. gcc-O test Add. O sub. O
4. Add. O: Add. C test. H
5. gcc-C add. C
7. sub. O: Sub. C test. H
8. gcc-c sub. C
10. clean:
11. RM-RF test
12. RM-RF *. O