学习Makefile文件

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程序开发的基本流程：

1.用编辑器编写源代码，如.c文件。

2.用编译器编译代码生成目标文件，如.o。
3.用链接器连接目标代码生成可执行文件，如.exe。
当源代码比较多时，就需要一个类似于批处理文件的自动化的编译工具对其进行处理，这便是make工具。当使用make工具时，需要编写一个规则文件，make依据它来批处理编译，这个文件就是makefile。

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具体参见陈浩大神博客：

        http://blog.csdn.net/haoel/article/details/2886