最权威的原始步骤可以参考github中关于此插件的README.md，如果时间允许的话，尽量多看几遍可以避免很多不必要的麻烦。
版本检测，一般新系统都满足，保证Vim>= 7.3.584，支持python就可以了。
第一步：下载Vundle和YouCompleteMe插件
输入以下指令，下载Vundle
git clone https://github.com/gmarik/Vundle.vim.git ~/.vim/bundle/Vundle.vim
下载成功后，在用户根目录下面，修改.vimrc文件，追加下面语句：
set nocompatible filetype off set rtp+=~/.vim/bundle/Vundle.vim call vundle#begin() Plugin 'gmarik/Vundle.vim' Plugin 'Valloric/YouCompleteMe' call vundle#end() filetype plugin indent on
然后在vim中先按Esc建，并且输入以下指令安装插件：
:PluginInstall
或在终端中输入：
vim +PluginInstall +qall
第二步：下载其他必要文件
- 下载最新版本的LLVM
强烈建议下载已经编译好的二级制文件包，如果下载源文件自己编译的话，你永远都不知道会出什么奇葩错误
然后解压到指定文件夹，过程如下：
cd ~ mkdir ycm_temp cd ycm_temp xz -d clang+llvm-3.6.0-x86_64-linux-gnu--14.04.tar.xz tar -xvf clang+llvm-3.6.0-x86_64-linux-gnu-ubuntu-14.04.tar
修改clang+llvm-3.6.0-x86_64-linux-gnu文件夹名字为llvm_root_dir
- 下载最新版本的cmake
强烈建议下载已经编译好的二级制文件包，如果下载源文件自己编译的话，你永远都不知道会出什么奇葩错误
然后将cmake连接至/usr/bin，比如我的是放在Downloads文件夹下面的，就地解压，并链接
tar zxvf cmake-3.2.2-Linux-x86_64.tar.gz ln -s /home/li/Downloads/cmake-3.2.2/bin/cmake /usr/bin/cmake
第三步：编译文件
运行如下指令，编译文件
cd ~ mkdir ycm_build cd ycm_build cmake -G "Unix Makefiles" -DPATH_TO_LLVM_ROOT=~/ycm_temp/llvm_root_dir . ~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp make ycm_support_libs
这样以来，就算是安装基本上完成了。
第四步：配置vim
虽然安装编译完成了，但距离成功还差一步，配置vim（修改.vimrc），这个根据需要配置便可，比如我的如下：
let g:ycm_global_ycm_extra_conf = '/home/li/.vim/bundle/YouCompleteMe/.ycm_extra_conf.py let g:ycm_seed_identifiers_with_syntax=1 " 语法关键字补全 let g:ycm_confirm_extra_conf=0 " 打开vim时不再询问是否加载ycm_extra_conf.py配置 inoremap <expr> <CR> pumvisible() ? "\<C-y>" : "\<CR>" "回车即选中当前项 set completeopt=longest,menu "让Vim的补全菜单行为与一般IDE一致(参考VimTip1228)
出现的问题：
- E492: Not an editor command:
可能的原因有很多，比如我遇到的是权限问题，为.vim的追加写入权限
- 不能正常启动，有很多红色的错误
可能的原因同样很多，比如我遇到的是使用编译器版本不合适，比如gcc5.1.0编译运行完成之后，错的不知其所以然
- 没有.ycm_extra.conf.py文件
可以参考YCM作者的文件自己修改或者直接使用它亦或者使用我的(见附件)。将它放在项目根目录或者指定目录，比如我放在
$HOME/.vim/bundle/YouCompleteMe/.ycm_extra_conf.py
当然记得修改.vimrc中相应的那行哦！
- 出现其他未知错误
vim中输入
:YcmDebugInfo
查看相关信息
- 如果完全按照本教程步骤来，还是出现了大量错误
此时要做的不是搜索其他教程，而是详细阅读README.md
附件
# This file is NOT licensed under the GPLv3, which is the license for the rest
# of YouCompleteMe.
#
# Here's the license text for this file:
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
# For more information, please refer to <http://unlicense.org/>
import os
import ycm_core
flags = [
'-Wall',
'-Wextra',
'-Wno-long-long',
'-Wno-variadic-macros',
'-fexceptions',
'-stdlib=libc++',
'-std=c++11',
'-x',
'c++',
'-I',
'.',
'-isystem',
'/usr/include',
'-isystem',
'/usr/local/include',
'-isystem',
'/Library/Developer/CommandLineTools/usr/include',
'-isystem',
'/Library/Developer/CommandLineTools/usr/bin/../lib/c++/v1',
]
compilation_database_folder = ''
if os.path.exists( compilation_database_folder ):
database = ycm_core.CompilationDatabase( compilation_database_folder )
else:
database = None
SOURCE_EXTENSIONS = [ '.cpp', '.cxx', '.cc', '.c', '.m', '.mm' ]
def DirectoryOfThisScript():
return os.path.dirname( os.path.abspath( __file__ ) )
def MakeRelativePathsInFlagsAbsolute( flags, working_directory ):
if not working_directory:
return list( flags )
new_flags = []
make_next_absolute = False
path_flags = [ '-isystem', '-I', '-iquote', '--sysroot=' ]
for flag in flags:
new_flag = flag
if make_next_absolute:
make_next_absolute = False
if not flag.startswith( '/' ):
new_flag = os.path.join( working_directory, flag )
for path_flag in path_flags:
if flag == path_flag:
make_next_absolute = True
break
if flag.startswith( path_flag ):
path = flag[ len( path_flag ): ]
new_flag = path_flag + os.path.join( working_directory, path )
break
if new_flag:
new_flags.append( new_flag )
return new_flags
def IsHeaderFile( filename ):
extension = os.path.splitext( filename )[ 1 ]
return extension in [ '.h', '.hxx', '.hpp', '.hh' ]
def GetCompilationInfoForFile( filename ):
if IsHeaderFile( filename ):
basename = os.path.splitext( filename )[ 0 ]
for extension in SOURCE_EXTENSIONS:
replacement_file = basename + extension
if os.path.exists( replacement_file ):
compilation_info = database.GetCompilationInfoForFile(
replacement_file )
if compilation_info.compiler_flags_:
return compilation_info
return None
return database.GetCompilationInfoForFile( filename )
def FlagsForFile( filename, **kwargs ):
if database:
compilation_info = GetCompilationInfoForFile( filename )
if not compilation_info:
return None
final_flags = MakeRelativePathsInFlagsAbsolute(
compilation_info.compiler_flags_,
compilation_info.compiler_working_dir_ )
else:
relative_to = DirectoryOfThisScript()
final_flags = MakeRelativePathsInFlagsAbsolute( flags, relative_to )
return {
'flags': final_flags,
'do_cache': True
}