Ubuntu16.04VIM无法补全错误记录

先记录一下YouCompleteMe的安装过程。

按照教程进行安装

1. 安装 vundle

# vundle是vim的包管理器，十分好用
cv@cv: ~$ git clone https://github.com/VundleVim/Vundle.vim.git ~/.vim/bundle/Vundle.vim
cv@cv: ~$ vim ~/.vimrc

写入：

" description: configuration of vim
" author: phillee
" date:    2019-06-04
" email: phillee2016@163.com

set nocompatible            " be iMproved, required
filetype off                " required

" set the runtime path to include Vundle and initialize
set runtimepath+=/home/cv/.vim/bundle/Vundle.vim
set runtimepath+=/home/cv/.vim/bundle/ctrlp.vim
set runtimepath+=/home/cv/.vim/bundle/ultisnips

call vundle#begin()
" alternatively, pass a path where Vundle should install plugins
" call vundle#begin('~/some/path/here')

" let Vundle manage Vundle, required
Plugin 'VundleVim/Vundle.vim'
" The following are examples of different formats supported.
" Keep Plugin commands between vundle#begin/end.

" plugin on GitHub repo
Plugin 'tpope/vim-fugitive'
Plugin 'Valloric/YouCompleteMe'
Plugin 'vim-syntastic/syntastic'
Plugin 'nvie/vim-flake8'

" " Track the engine
Plugin 'SirVer/ultisnips'

" Snippets are separated from the engine.
Plugin 'honza/vim-snippets'

" plugin from http://vim-scripts.org/vim/scripts.html
" Plugin 'L9'
" Git plugin not hosted on GitHub
" Plugin 'git://git.wincent.com/command-t.git'

" git repos on your local machine(i.e. when working on your own plugin)
" Plugin 'file://home/gmarik/path/to/plugin'

" The sparkup vim script is in a subdirectory of this repo called vim.
" Pass the path to set the runtimepath properly.
" Plugin 'rstacruz/sparkup', {'rtp': 'vim/'}

" Install L9 and avoid a Naming conflict if you've already install a different version somewhere else.
" Plugin 'ascenator/L9', {'name': 'newL9'}

" Define bundles via GitHub repo
Bundle 'scrooloose/nerdtree'

" All of your Plugins must be added before the following line
call vundle#end()

filetype plugin indent on

" 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

set number
set numberwidth=

set tabstop=
set background=dark
set showcmd
set encoding=utf-

" Default conf file path
let g:ycm_global_ycm_extra_conf='~/.vim/.ycm_extra_conf.py'
" No query for loading ycm_extra_conf.py configuration when vim is opened
let g:ycm_confirm_extra_conf=

let g:ycm_use_clangd=

set completeopt=longest,menu

" path of python Interpreter
let g:ycm_path_to_python_interpreter='/usr/bin/python'
" Enable complete syntax
let g:ycm_seed_identifiers_with_syntax=

" Enable or not complete even in the comments
let g:ycm_complete_in_comments=
let g:ycm_collect_identifiers_from_comments_and_strings=
let g:ycm_collect_identifiers_from_tags_files=
let g:ycm_min_num_of_chars_for_completion=
let g:ycm_autoclose_preview_window_after_completion=
let g:ycm_cache_omnifunc=
let g:ycm_complete_in_strings=

let python_highlight_all=
syntax on
au BufNewFile,BufRead *.py
    \ set tabstop=    |
    \ set softtabstop=    |
    \ set shiftwidth=    |
    \ set textwidth=    |
    \ set expandtab    |
    \ set autoindent    |
    \ set fileformat=unix

"Autoclose preview window when leave the insert mode
autocmd InsertLeave * if pumvisible()==|pclose|endif

"The user-defined action of the direction keys"
inoremap <expr> <Down>    pumvisible()?'\<C-n>':'\<Down>'
inoremap <expr> <Up>    pumvisible()?'\<C-p>':'\<Up>'
inoremap <expr> <PageDown>    pumvisible()?'\<PageDown>\<C-p>\<C-n>':'\<PageDown>'
inoremap <expr> <PageUp>    pumvisible()?'\<PageUp>\<C-p>\<C-n>':'\<PageUp>'

" NERDTree config
map <F2> :NERDTreeToggle<CR>
autocmd vimenter * NERDTree
autocmd StdinReadPre * let s:std_in=
autocmd VimEnter * if argc() ==  && !exists("s:std_in") | NERDTree | endif

" This command is to open NERDTree automatically when vim starts up on opening
" a directory.
autocmd VimEnter * if argc() ==  && isdirectory(argv()[]) && !exists("s:std_in") | exe 'NERDTree' argv()[] | wincmd p | ene | endif 

" This command is to close vim if the only window left open is a NERDTree.
autocmd bufenter * if(winnr("$")== && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif
let g:NERDTreeDirArrowExpandable = '~'
let g:NERDTreeDirArrowCollapsible = '~'

" UltiSnips - Trigger configuration. Do not use <tab> if you use https://github.com/Valloric/YouCompleteMe.
let g:UltiSnipsExpandTrigger="<c-j>"
let g:UltiSnipsListSnippets="<c-h>"
let g:UltiSnipsJumpForwardTrigger="<c-j>"
let g:UltiSnipsJumpBackwardTrigger="<c-k>"
let g:UltiSnipsSnippetDirectories=['/home/cv/.vim/bundle/ultisnips/mysnippets/']

" If you want :UltiSnipsEdit to split your window.
let g:UltiSnipsEditSplit="vertical"

.vimrc

2. 安装 YouCompleteMe

cv@cv: ~$ sudo apt-get install build-essential cmake
cv@cv: ~$ sudo apt-get install python-dev python3-dev
cv@cv: ~$ cd ~/.vim/bundle/YouCompleteMe
cv@cv: ~/.vim/bundle/YouCompleteMe$ git submodule update --init --recursive
cv@cv: ~/.vim/bundle/YouCompleteMe$ ./install.py --clang-completer

3. 安装 libclang ，否则无法语义补全

cv@cv: ~/.vim/bundle/YouCompleteMe$ sudo apt-get install llvm-3.9 clang-3.9 libclang-3.9-dev libboost-all-dev

4. 编译构建 ycm_core 库

cv@cv: ~/.vim/bundle/YouCompleteMe$ mkdir .ycm_build
cv@cv: ~/.vim/bundle/YouCompleteMe$ cd .ycm_build
cv@cv: ~/.vim/bundle/YouCompleteMe/.ycm_build$ cmake -G "Unix Makefiles" -DUSE_SYSTEM_BOOST=ON -DUSE_SYSTEM_LIBCLANG=ON . ../third_party/ycmd/cpp
cv@cv: ~/.vim/bundle/YouCompleteMe/.ycm_build$ cmake --build . --target ycm_core --config Release

5. 配置文件

主要是 ~/.vimrc 和 ~/.vim/.ycm_extra_conf.py 两个文件

cv@cv: ~/.vim/bundle/YouCompleteMe/.ycm_build$ cp ~/.vim/bundle/YouCompleteMe/third_party/ycmd/examples/.ycm_extra_conf.py ~/.vim/

cv@cv: ~/.vim/bundle/YouCompleteMe/.ycm_build$ sudo vim ~/.vim/.ycm_extra_conf.py

添加 C++  头文件和 opencv 头文件索引，写入

'-isystem',
'/usr/include/c++/5.4.0',
'-isystem',
'/usr/local/include/opencv2',

6. 然后安装各种插件

有些插件需要先去 GitHub 上克隆到本地。

打开 vim ，在命令模式下键入下面的插件安装指令，等待完成。

cv@cv: ~$ vim

:PluginInstall

7. 试验一下效果

再次打开 vim ，结果最下面有提示

the ycmd server SHUT DOWN (restart with ':YcmRestartServer'). Unexpected error while ...M core library. Type ':YcmToggleLogs ycmd_41013_stderr_cys4wh16.log' to check the logs.

根据提示键入 :YcmToggleLogs ycmd_41013_stderr_cys4wh16.log

# /tmp/ycmd_41013_stderr_cys4wh16.log
Traceback (most recent call last):
  File "/home/cv/.vim/bundle/YouCompleteMe/third_party/ycmd/ycmd/utils.py", line , in ImportAndCheckCore
    ycm_core = ImportCore()
  File "/home/cv/.vim/bundle/YouCompleteMe/third_party/ycmd/ycmd/utils.py", line , in ImportCore
    import ycm_core as ycm_core
ImportError: /home/cv/.vim/bundle/YouCompleteMe/third_party/ycmd/ycm_core.so: undefined symbol: clang_getCompletionFixIt

原来是 clang_getCompletionFixIt 未定义，怎么办呢？

Valloric/YouCompleteMe主页查看了一下，找到了一些线索

根据指示运行 install.sh （因为 install.py 和 install.sh 运行效果一样，当然也可以使用 cv@cv: ~$ python install.py ）

cv@cv: ~$ ~/.vim/bundle/YouCompleteMe/install.sh

#!/bin/sh

echo "WARNING: this script is deprecated. Use the install.py script instead." >&

SCRIPT_DIR=$(dirname $ || exit $?)

command_exists() {
  command -v "$1" >/dev/null >& ;
}

PYTHON_BINARY=python
if command_exists python2; then
  PYTHON_BINARY=python2
fi

$PYTHON_BINARY "$SCRIPT_DIR/install.py" "$@" || exit $?

install.sh

然后就ok了，现在补全功能可以用了。

• 如果在执行 ./install.py --clang-completer  的过程中出现HASH mismatch错误

Searching Python 2.7 libraries...
Found Python library: /usr/lib/python2./config-x86_64-linux-gnu/libpython2..so
Found Python headers folder: /usr/include/python2.
-- The C compiler identification is GNU 5.4.
-- The CXX compiler identification is GNU 5.4.
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PythonLibs: /usr/lib/python2./config-x86_64-linux-gnu/libpython2..so (found suitable version "
2.7.", minimum required is "2.7")
-- Downloading libclang 8.0. from https://dl.bintray.com/micbou/libclang/libclang-8.0.0-x86_64-unknown-l
inux-gnu.tar.bz2
CMake Error at ycm/CMakeLists.txt: (file):
  file DOWNLOAD HASH mismatch

    for file: [/home/cv/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/../clang_archives/libclang-8.0.-x
86_64-unknown-linux-gnu.tar.bz2]
      expected hash: [e81a186cd1180ae80c17d67d8d0c101248f8ee032d138cf6f1e95001e733249c]
        actual hash: [e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855]
             status: [;"SSL connect error"]

CMake Error at ycm/CMakeLists.txt: (message):
  Cannot find path to libclang in prebuilt binaries

-- Configuring incomplete, errors occurred!
See also "/tmp/ycm_build_JVaiLo/CMakeFiles/CMakeOutput.log".
ERROR: the build failed.

NOTE: it is *highly* unlikely that this is a bug but rather that this is a problem
with the configuration of your system or a missing dependency. Please carefully
read CONTRIBUTING.md and if you're sure that it is a bug, please raise an issue on
the issue tracker, including the entire output of this script and the invocation
line used to run it.

问题详情可以参考 GitHub上YouCompleteMe  Issues: CMake Error at ycm/CMakeLists.txt: 92(file) file DOWNLOAD HASH mismatch #2353

解决方案：可能是网络的问题，需要手动下载，放到指定位置，重新执行上面的指令即可。下载地址【 https://dl.bintray.com/micbou/libclang/ 】到网站上找到自己需要的版本下载即可。

下载完成后需要放在 ~/.vim/bundle/YouCompleteMe/third_party/ycmd/clang_archives 文件夹下面

mv ~/Downloads/libclang-8.0.-x86_64-unknown-linux-gnu.tar.bz2 ~/.vim/bundle/YouCompleteMe/third_party/ycmd/clang_archives/