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：
.vimrc" 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=5 set tabstop=4 set background=dark set showcmd set encoding=utf-8 " 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=0 let g:ycm_use_clangd=0 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=1 " Enable or not complete even in the comments let g:ycm_complete_in_comments=1 let g:ycm_collect_identifiers_from_comments_and_strings=0 let g:ycm_collect_identifiers_from_tags_files=1 let g:ycm_min_num_of_chars_for_completion=2 let g:ycm_autoclose_preview_window_after_completion=1 let g:ycm_cache_omnifunc=0 let g:ycm_complete_in_strings=1 let python_highlight_all=1 syntax on au BufNewFile,BufRead *.py set tabstop=4 | set softtabstop=4 | set shiftwidth=4 | set textwidth=79 | set expandtab | set autoindent | set fileformat=unix "Autoclose preview window when leave the insert mode autocmd InsertLeave * if pumvisible()==0|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=1 autocmd VimEnter * if argc() == 0 && !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() == 1 && isdirectory(argv()[0]) && !exists("s:std_in") | exe 'NERDTree' argv()[0] | wincmd p | ene | endif " This command is to close vim if the only window left open is a NERDTree. autocmd bufenter * if(winnr("$")==1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif let g:NERDTreeDirArrowExpandable = '~' let g:NERDTreeDirArrowCollapsible = '~' " UltiSnips - Trigger configuration. Do not use <tab> if you use https://github.com/Valloric/YouCompleteMe. let g:UltiSnipsExpandTrigger="<c-j>" let g:UltiSnipsListSnippets="<c-h>" let g:UltiSnipsJumpForwardTrigger="<c-j>" let g:UltiSnipsJumpBackwardTrigger="<c-k>" let g:UltiSnipsSnippetDirectories=['/home/cv/.vim/bundle/ultisnips/mysnippets/'] " If you want :UltiSnipsEdit to split your window. let g:UltiSnipsEditSplit="vertical"
2. 安装 YouCompleteMe
cv@cv: ~$ 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 637, in ImportAndCheckCore ycm_core = ImportCore() File "/home/cv/.vim/bundle/YouCompleteMe/third_party/ycmd/ycmd/utils.py", line 628, 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
install.sh#!/bin/sh echo "WARNING: this script is deprecated. Use the install.py script instead." 1>&2 SCRIPT_DIR=$(dirname $0 || exit $?) command_exists() { command -v "$1" >/dev/null 2>&1 ; } PYTHON_BINARY=python if command_exists python2; then PYTHON_BINARY=python2 fi $PYTHON_BINARY "$SCRIPT_DIR/install.py" "$@" || exit $?
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/python2.7/config-x86_64-linux-gnu/libpython2.7.so Found Python headers folder: /usr/include/python2.7 -- The C compiler identification is GNU 5.4.0 -- The CXX compiler identification is GNU 5.4.0 -- 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/python2.7/config-x86_64-linux-gnu/libpython2.7.so (found suitable version " 2.7.12", minimum required is "2.7") -- Downloading libclang 8.0.0 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:107 (file): file DOWNLOAD HASH mismatch for file: [/home/cv/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/../clang_archives/libclang-8.0.0-x 86_64-unknown-linux-gnu.tar.bz2] expected hash: [e81a186cd1180ae80c17d67d8d0c101248f8ee032d138cf6f1e95001e733249c] actual hash: [e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855] status: [35;"SSL connect error"] CMake Error at ycm/CMakeLists.txt:123 (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-8.0.0-x86_64-unknown-linux-gnu.tar.bz2 ~/.vim/bundle/YouCompleteMe/third_party/ycmd/clang_archives/