对c代码进行语法分析，生成语句之间的连接关系，借助dot工具以图形化方式显示，另外解析出每个函数的变量的定义、使用情况 该版本没有加入预处理，预处理功能可以自己开发(有些复杂)，也可以借助gnu c的预处理功能-Parse c code to generate the connection between the statement, with the dot tool graphically displays another parse out the variables of ea

The GNU Make Book demystifies GNU make and shows you how to use its best features. You'll find a fast, thorough rundown of the basics of variables, rules, targets, and makefiles. Learn how to fix wastefully long build times and other common problems,