This plugin uses clang for accurately completing C and C++ code. To build and install in one step, type: $ make install To build and install in two steps, type: $ make $ vim clang_complete.vmb -c 'so %' -c 'q' Alternatively, you can also put the files in ~/.vim/ You need Vim 7.3 or higher, compiled with python support and ideally, with the conceal feature. See doc/clang_complete.txt for help and license. #### Troubleshooting The first step is to check values of 'omnifunc' and 'completefunc' options in a C++ buffer where completion doesn't work (the value should be ClangComplete). This can be done with the following command: set omnifunc? completefunc? Output of :messages command after startup could also show something useful in case there were problems with plugin initialization. If everything is fine, next step might be to load only clang_complete plugin and see if anything changes.