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解压所里面有三个文件， 放到vim的安装目录下即可。
2.建索引

-b

Build the cross-reference only.

-C

Ignore letter case when searching.

-k

``Kernel Mode'', turns off the use of the default include dir(usually /usr/include) when building the database, since kernelsource trees generally do not use it.

-R

Recurse subdirectories for source files.

-i namefile

Browse through all source files whose names are listed innamefile (file names separated by spaces, tabs, or new-lines)instead of the default (cscope.files). If this option is specified,cscope ignores any files appearing on the command line. Theargument namefile can be set to ``-'' to accept a list of filesfrom stdio. Filenames in the namefile that contain whitespace haveto be enclosed in "double quotes". Inside such quoted filenames,any double-quote and backslash characters have to be escaped bybackslashes.

具体参数可以见：
http://cscope.sourceforge.net/cscope_man_page.html

执行结束后你可以在当前目录下发现cscope.out文件，这就是cscope建立的符号数据库。上面这个命令中，-b参数使得cscope不启动自带的用户界面，而仅仅建立符号数据库
3. 在vim命令行下执行：

:cs help
cscope commands:
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 functiond: Find functions called by this functione: Find this egrep patternf: Find this fileg: Find this definitioni: Find files #including this files: Find this C symbolt: Find assignments tohelp : Show this message              (Usage: help)kill : Kill a connection              (Usage: kill #)reset: Reinit all connections         (Usage: reset)show : Show connections               (Usage: show)

s: 查找C语言符号，即查找函数名、宏、枚举值等出现的地方
g: 查找函数、宏、枚举等定义的位置，类似ctags所提供的功能
d: 查找本函数调用的函数
c: 查找调用本函数的函数
t: 查找指定的字符串
e: 查找egrep模式，相当于egrep功能，但查找速度快多了
f: 查找并打开文件，类似vim的find功能
i: 查找包含本文件的文

使用cscope查找do_fork函数的定义：
在vim命令行下执行：

:cs f g do_fork每次输入这样挺麻烦， 下载一个插件cscope_quickfix.vim
。http://www.vim.org/scripts/download_script.php?src_id=2635在_vimrc中增加："cscope"If you want to use Popup menu for :Cscope command, put a line in .vimrc like:let Cscope_PopupMenu = 1这样可以在右键中弹出菜单。这样就可以不用记命令。