2019独角兽企业重金招聘Python工程师标准>>> 
1, cscope安装
1. 软件下载： http://sourceforge.net/project/showfiles.php?group_id=4664
解压：
2. 软件安装:
1. ./configure --with-flex (注：如果平台是Linux,最好带上 --with-flex选项)
2. make (注：我没有遇到错误)
3. make install (注： 直接安装好了)
2,cscope配置
1. 修改vim配置文件vimrc.你可以修改/etc/vimrc使用所有用户都使用本配置文件，当然你还可以修改~/.vimrc
1. 下载配置文件：cscope_map.vim
3. 里边的命令意思请看下边文章
3,cscope使用
1. 建立cscope使用的索引文件
1. 在你需要浏览源码的根目录下（如你想用cscope看linux源码)使用下面命令：
* #: cscope -Rbkq<回车>
2. R 表示把所有子目录里的文件也建立索引
3. b 表示cscope不启动自带的用户界面，而仅仅建立符号数据库
4. q生成cscope.in.out和cscope.po.out文件，加快cscope的索引速度
5. k在生成索引文件时，不搜索/usr/include目录
2. 在源码根目录下打开任意.c文件，使用如下命令：
1. Ctrl+]将跳到光标所在变量或函数的定义处 Ctrl+T返回
2. ：cs find s ---- 查找C语言符号，即查找函数名、宏、枚举值等出现的地方
：cs find g ---- 查找函数、宏、枚举等定义的位置，类似ctags所提供的功能
：cs find d ---- 查找本函数调用的函数
：cs find c ---- 查找调用本函数的函数
：cs find t: ---- 查找指定的字符串
：cs find e ---- 查找egrep模式，相当于egrep功能，但查找速度快多了
：cs find f ---- 查找并打开文件，类似vim的find功能
：cs find i ---- 查找包含本文件的文
3. 2的所以命令也可以且按銉来实现：
1. Ctrl+\\ 再按 s 表示：cs find s命令
2. 同理实现cs find + g,d,c,t,e,f,i命令
3. cscope_map.vim说明：
1. 有英文注释的我就不说明了，我就说一下里边的键map映射
2. 如： nmaps :cs find s =expand("")
1. nmap 表示在vim的普通模式下，即相对于：编辑模块和可视模式，以下是几种模式
1. :map 普通，可视模式及操作符等待模式
:vmap 可视模式
:omap 操作符等待模式
:map! 插入和命令行模式
:imap 插入模式
:cmap 命令行模式
2.表示：Ctrl+\\
3. s表示输入(即按：s)s
4. : 表示输入\':\'
5. “cs find s"表示输入"cs find s"也即是要输入的命令
6.=expand("cword")总体是为了得到：光标下的变量或函数。cword 表示：cursor word, 类似的还有：cfile表示光标所在处的文件名吧
7. ＜CR＞＜CR＞就是回车吧，不太清楚
第一步：bzip2 -d gcc-4.1.0.tar.bz2
---上面解压完之后执行下面的命令。
第二步：tar -xvf gcc-4.1.0.tar 或 tar -xvf *.tar
解完之后会出现多一个文件夹 gcc-4.1.0
2. 软件安装:
1. ./configure --with-flex (注：如果平台是Linux,最好带上 --with-flex选项)
2. make (注：我没有遇到错误)
3. make install (注： 直接安装好了)
2,cscope配置
1. 修改vim配置文件vimrc.你可以修改/etc/vimrc使用所有用户都使用本配置文件，当然你还可以修改~/.vimrc
1. 下载配置文件：cscope_map.vim
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" CSCOPE settings for vim
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"
" This file contains some boilerplate settings for vim's cscope interface,
" plus some keyboard mappings that I've found useful.
"
" USAGE:
" -- vim 6: Stick this file in your ~/.vim/plugin directory (or in a
" 'plugin' directory in some other directory that is in your
" 'runtimepath'.
"
" -- vim 5: Stick this file somewhere and 'source cscope.vim' it from
" your ~/.vimrc file (or cut and paste it into your .vimrc).
"
" NOTE:
" These key maps use multiple keystrokes (2 or 3 keys). If you find that vim
" keeps timing you out before you can complete them, try changing your timeout
" settings, as explained below.
"
" Happy cscoping,
"
" Jason Duell [email protected] 2002/3/7
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" This tests to see if vim was configured with the '--enable-cscope' option
" when it was compiled. If it wasn't, time to recompile vim...
if has("cscope")
""""""""""""" Standard cscope/vim boilerplate
" use both cscope and ctag for 'ctrl-]', ':ta', and 'vim -t'
set cscopetag
" check cscope for definition of a symbol before checking ctags: set to 1
" if you want the reverse search order.
set csto=0
" add any cscope database in current directory
if filereadable("cscope.out")
cs add cscope.out
" else add the database pointed to by environment variable
elseif $CSCOPE_DB != ""
cs add $CSCOPE_DB
endif
" show msg when any other cscope db added
set cscopeverbose
""""""""""""" My cscope/vim key mappings
"
" The following maps all invoke one of the following cscope search types:
"
" 's' symbol: find all references to the token under cursor
" 'g' global: find global definition(s) of the token under cursor
" 'c' calls: find all calls to the function name under cursor
" 't' text: find all instances of the text under cursor
" 'e' egrep: egrep search for the word under cursor
" 'f' file: open the filename under cursor
" 'i' includes: find files that include the filename under cursor
" 'd' called: find functions that function under cursor calls
"
" Below are three sets of the maps: one set that just jumps to your
" search result, one that splits the existing vim window horizontally and
" diplays your search result in the new window, and one that does the same
" thing, but does a vertical split instead (vim 6 only).
"
" I've used CTRL-\ and CTRL-@ as the starting keys for these maps, as it's
" unlikely that you need their default mappings (CTRL-\'s default use is
" as part of CTRL-\ CTRL-N typemap, which basically just does the same
" thing as hitting 'escape': CTRL-@ doesn't seem to have any default use).
" If you don't like using 'CTRL-@' or CTRL-\, , you can change some or all
" of these maps to use other keys. One likely candidate is 'CTRL-_'
" (which also maps to CTRL-/, which is easier to type). By default it is
" used to switch between Hebrew and English keyboard mode.
"
" All of the maps involving the macro use '^$': this is so
" that searches over '#include " return only references to
" 'time.h', and not 'sys/time.h', etc. (by default cscope will return all
" files that contain 'time.h' as part of their name).
" To do the first type of search, hit 'CTRL-\', followed by one of the
" cscope search types above (s,g,c,t,e,f,i,d). The result of your cscope
" search will be displayed in the current window. You can use CTRL-T to
" go back to where you were before the search.
"
nmap s :cs find s =expand("")
nmap g :cs find g =expand("")
nmap c :cs find c =expand("")
nmap t :cs find t =expand("")
nmap e :cs find e =expand("")
nmap f :cs find f =expand("")
nmap i :cs find i ^=expand("")$
nmap d :cs find d =expand("")
" Using 'CTRL-spacebar' (intepreted as CTRL-@ by vim) then a search type
" makes the vim window split horizontally, with search result displayed in
" the new window.
"
" (Note: earlier versions of vim may not have the :scs command, but it
" can be simulated roughly via:
" nmap s :cs find s =expand("")
nmap s :scs find s =expand("")
nmap g :scs find g =expand("")
nmap c :scs find c =expand("")
nmap t :scs find t =expand("")
nmap e :scs find e =expand("")
nmap f :scs find f =expand("")
nmap i :scs find i ^=expand("")$
nmap d :scs find d =expand("")
" Hitting CTRL-space *twice* before the search type does a vertical
" split instead of a horizontal one (vim 6 and up only)
"
" (Note: you may wish to put a 'set splitright' in your .vimrc
" if you prefer the new window on the right instead of the left
nmap s :vert scs find s =expand("")
nmap g :vert scs find g =expand("")
nmap c :vert scs find c =expand("")
nmap t :vert scs find t =expand("")
nmap e :vert scs find e =expand("")
nmap f :vert scs find f =expand("")
nmap i :vert scs find i ^=expand("")$
nmap d :vert scs find d =expand("")
""""""""""""" key map timeouts
"
" By default Vim will only wait 1 second for each keystroke in a mapping.
" You may find that too short with the above typemaps. If so, you should
" either turn off mapping timeouts via 'notimeout'.
"
"set notimeout
"
" Or, you can keep timeouts, by uncommenting the timeoutlen line below,
" with your own personal favorite value (in milliseconds):
"
"set timeoutlen=4000
"
" Either way, since mapping timeout settings by default also set the
" timeouts for multicharacter 'keys codes' (like ), you should also
" set ttimeout and ttimeoutlen: otherwise, you will experience strange
" delays as vim waits for a keystroke after you hit ESC (it will be
" waiting to see if the ESC is actually part of a key code like ).
"
"set ttimeout
"
" personally, I find a tenth of a second to work well for key code
" timeouts. If you experience problems and have a slow terminal or network
" connection, set it higher. If you don't set ttimeoutlen, the value for
" timeoutlent (default: 1000 = 1 second, which is sluggish) is used.
"
"set ttimeoutlen=100
endif 3. 里边的命令意思请看下边文章
3,cscope使用
1. 建立cscope使用的索引文件
1. 在你需要浏览源码的根目录下（如你想用cscope看linux源码)使用下面命令：
* #: cscope -Rbkq<回车>
2. R 表示把所有子目录里的文件也建立索引
3. b 表示cscope不启动自带的用户界面，而仅仅建立符号数据库
4. q生成cscope.in.out和cscope.po.out文件，加快cscope的索引速度
5. k在生成索引文件时，不搜索/usr/include目录
2. 在源码根目录下打开任意.c文件，使用如下命令：
1. Ctrl+]将跳到光标所在变量或函数的定义处 Ctrl+T返回
2. ：cs find s ---- 查找C语言符号，即查找函数名、宏、枚举值等出现的地方
：cs find g ---- 查找函数、宏、枚举等定义的位置，类似ctags所提供的功能
：cs find d ---- 查找本函数调用的函数
：cs find c ---- 查找调用本函数的函数
：cs find t: ---- 查找指定的字符串
：cs find e ---- 查找egrep模式，相当于egrep功能，但查找速度快多了
：cs find f ---- 查找并打开文件，类似vim的find功能
：cs find i ---- 查找包含本文件的文
3. 2的所以命令也可以且按銉来实现：
1. Ctrl+\\ 再按 s 表示：cs find s命令
2. 同理实现cs find + g,d,c,t,e,f,i命令
3. cscope_map.vim说明：
1. 有英文注释的我就不说明了，我就说一下里边的键map映射
2. 如： nmap
1. nmap 表示在vim的普通模式下，即相对于：编辑模块和可视模式，以下是几种模式
1. :map 普通，可视模式及操作符等待模式
:vmap 可视模式
:omap 操作符等待模式
:map! 插入和命令行模式
:imap 插入模式
:cmap 命令行模式
2.
3. s表示输入(即按：s)s
4. : 表示输入\':\'
5. “cs find s"表示输入"cs find s"也即是要输入的命令
6.
7. ＜CR＞＜CR＞就是回车吧，不太清楚