$ sudo apt-get install cscope
$ cscope --help
$ Usage: cscope [-bcCdehklLqRTuUvV] [-f file] [-F file] [-i file] [-I dir] [-s dir]
[-p number] [-P path] [-[0-8] pattern] [source files]
-b Build the cross-reference only.
-C Ignore letter case when searching.
-c Use only ASCII characters in the cross-ref file (don't compress).
-d Do not update the cross-reference.
-e Suppress the <Ctrl>-e command prompt between files.
-F symfile Read symbol reference lines from symfile.
-f reffile Use reffile as cross-ref file name instead of cscope.out.
-h This help screen.
-I incdir Look in incdir for any #include files.
-i namefile Browse through files listed in namefile, instead of cscope.files
-k Kernel Mode - don't use /usr/include for #include files.
-L Do a single search with line-oriented output.
-l Line-oriented interface.
-num pattern Go to input field num (counting from 0) and find pattern.
-P path Prepend path to relative file names in pre-built cross-ref file.
-p n Display the last n file path components.
-q Build an inverted index for quick symbol searching.
-R Recurse directories for files.
-s dir Look in dir for additional source files.
-T Use only the first eight characters to match against C symbols.
-U Check file time stamps.
-u Unconditionally build the cross-reference file.
-v Be more verbose in line mode.
-V Print the version number.
Please see the manpage for more information.
cscope 常用选项；
-R: 在生成索引文件时，搜索子目录树中的代码;
-b: 只生成索引文件，不进入cscope的界面;
-q: 生成cscope.in.out和cscope.po.out文件，加快cscope的索引速度;
-k: 在生成索引文件时，不搜索/usr/include目录;
-i: 指定源文件来源位置;
-Idir: 在-I选项指出的目录中查找头文件;
-u: 扫描所有文件，重新生成交叉索引文件;
-C: 在搜索时忽略大小写;
-P path: 在以相对路径表示的文件前加上的path;
:cs find 选项:
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件;
~/.gvimrc中的配置
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" cscope setting
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
if has("cscope")
set csprg=/usr/bin/cscope
set csto=1
set cst
set nocsverb
" add any database in current directory
if filereadable("cscope.out")
cs add cscope.out
endif
set csverb
endif
nmap <C-@>s :cs find s <C-R>=expand("<cword>")<CR><CR>
nmap <C-@>g :cs find g <C-R>=expand("<cword>")<CR><CR>
nmap <C-@>c :cs find c <C-R>=expand("<cword>")<CR><CR>
nmap <C-@>t :cs find t <C-R>=expand("<cword>")<CR><CR>
nmap <C-@>e :cs find e <C-R>=expand("<cword>")<CR><CR>
nmap <C-@>f :cs find f <C-R>=expand("<cfile>")<CR><CR>
nmap <C-@>i :cs find i ^<C-R>=expand("<cfile>")<CR>$<CR>
nmap <C-@>d :cs find d <C-R>=expand("<cword>")<CR><CR>
操作指令：
# 在源代码根目录下输入
$ find . -name "*.[ch]" -o -name "*.cpp" -o -name "*.hpp" > cscope.file
$ cscope -Rbkq
$ gvim <file> #打开一个文件；
$ :cs add cscope.out
$ :cs find g <pattern> #搜索一个宏变量的定义位置；
