ctags && cscope

在源码目录下，运行
$ctags -R
在要搜索函数名处按ctrl+]，跳转到函数定义代码部分
再点击ctrl+t返回函数调用处

生成cscope索引文件
$cscope -Rbkq
使vi关联cscope数据库
:cs add cscope.out
:cs show  //查看关联数据库名
:cs add //添加一个新的数据库
add  : Add a new database             (Usage: add file|dir [pre-path] [flags])
find : Query for a pattern            (Usage: find c|d|e|f|g|i|s|t name)
       c: Find functions calling this function
       d: Find functions called by this function
       e: Find this egrep pattern
       f: Find this file
       g: Find this definition
       i: Find files #including this file
       s: Find this C symbol
       t: Find assignments to
help : Show this message              (Usage: help)
kill : Kill a connection              (Usage: kill #)
reset: Reinit all connections         (Usage: reset)
show : Show connections               (Usage: show)

查找工程中的main函数
:cstag main