-I/usr/local/include/gtk-2.0
-I/usr/local/include/gio-unix-2.0/
-I/usr/local/include/atk-1.0
...

" clang_autocomplete configuration
let g:SuperTabDefaultCompletionType="context"
set completeopt=menuone,menu,longest
set pumheight=15

let g:clang_use_library=1
let g:clang_library_path="/usr/local/lib"
let g:clang_snippets=1
let g:clang_snippets_engine='ultisnips'
let g:clang_conceal_snippets=1
let g:clang_periodic_quickfix=1
let g:clang_hl_errors=1
let g:clang_complete_auto = 0
let g:clang_complete_copen=1