The original clang_complete was created by Xavier Deguillard and Tobias Grosser.

I'm maintaining this fork, with lots of code refactored and simplified, for better integration with NCM.

Here's some of the work in brief.

• Builtin parameter expansion snippet engine removed in favor of ultisnips.
• Quickfix feature removed in favor of neomake or syntastic, etc.
• Builtin omnifunc/completefunc with threading, and some default insert mode mapping removed, in favor of NCM.

• clang installed on your system. (eg. yum install clang clang-devel or apt-get install libclang-dev)

To get clang_complete working with NCM you must install the neovim Python package for Python 2. clang_complete is invoked with the Python 2 interpreter, not the Python 3 interpreter, because the clang Python bindings only support Python 2.

Assuming you're using vim-plug.

Plug 'roxma/clang_complete'

• Set the clang_library_path to the directory containing file named libclang.{dll,so,dylib} (for Windows, Unix variants and OS X respectively) or the file itself, example:

" path to directory where library can be found
let g:clang_library_path='/usr/lib/llvm-3.8/lib'
" or path directly to the library file
let g:clang_library_path='/usr/lib64/libclang.so.3.8'

• Goto declaration.

" <Plug>(clang_complete_goto_declaration_preview)
au FileType c,cpp  nmap gd <Plug>(clang_complete_goto_declaration)

• Compiler options can be configured in a .clang_complete file in each project root. Example of .clang_complete file:

-DDEBUG
-include ../config.h
-I../common
-I/usr/include/c++/4.5.3/
-I/usr/include/c++/4.5.3/x86_64-slackware-linux/

• Makefile example for auto-generating .clang_complete

.clang_complete: Makefile
	echo $(CXXFLAGS) > $@

If you are using cmake, unfortunately, I don't have a decent hack. This might work. Currently I use make VERBOSE=1 to show the compile command and then edit the .clang_complete manually.

• Integrate with neomake

	let g:neomake_cpp_enabled_makers = ['clang']
	let g:neomake_c_enabled_makers = ['clang']

See doc/clang_complete.txt for help and license.