YouCompleteMe安装教程
1、安装Vundle插件管理工具
git clone https://github.com/gmarik/Vundle.vim.git ~/.vim/bundle/Vundle.vim
在vim的配置文件vimrc里面添加如下内容（vimrc文件位置，命令模式下:echo $VIM）
set nocompatible " be iMproved, required
filetype off " required
" set the runtime path to include Vundle and initialize
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
" alternatively, pass a path where Vundle should install plugins
"call vundle#begin('~/some/path/here')
" let Vundle manage Vundle, required
Plugin 'gmarik/Vundle.vim'
Plugin 'Valloric/YouCompleteMe'
" All of your Plugins must be added before the following line
call vundle#end() " required
filetype plugin indent on " required
" To ignore plugin indent changes, instead use:
"filetype plugin on
"
" Brief help
" :PluginList - lists configured plugins
" :PluginInstall - installs plugins; append `!` to update or just :PluginUpdate
" :PluginSearch foo - searches for foo; append `!` to refresh local cache
" :PluginClean - confirms removal of unused plugins; append `!` to auto-approve removal
"
" see :h vundle for more details or wiki for FAQ
" Put your non-Plugin stuff after this line
2、注意，需要注释掉vimrc文件中的 runtime!debian.vim
即在此行前加"号
Vundle安装完成后就可以开始安装YouCompleteMe了，配置已经在上述的文件中写好
打开vim，命令行模式下输入 :PluginInstall
然后就可以看到插件正在安装，由于需要下载的文件比较多（主要是下载的比较慢，普通下载速度在10kb左右），需要的时间可能会有些长，一定要耐心等待，比如作者本人就等了三个小时才提示安装完成
3、安装完成YouCompleteMe以后，需要配置方可真正发挥作用
在 vimrc文件中添加如下内容：
let g:ycm_global_ycm_extra_conf = '~/.vim/bundle/YouCompleteMe/cpp/ycm/.ycm_extra_conf.py'
然后重新打开vim即可