sudo apt-get install llvm-dev

sudo apt-get install libclang-dev

 (:name clang-complete-async

        :website "https://github.com/Golevka/emacs-clang-complete-async"

        :description "An emacs extension to complete C and C++ code using libclang."

        :type github

        :pkgname "Golevka/emacs-clang-complete-async"

        :build '(("make"))

        :depends auto-complete

        :features auto-complete-clang-async

        :prepare (setq ac-clang-complete-executable

                       (expand-file-name

                        (concat (el-get-package-directory "clang-complete-async") "clang-complete"))))

 (require 'auto-complete-clang-async)  

 (defun ac-cc-mode-setup ()

   (setq ac-clang-complete-executable "~/.emacs.d/el-get/clang-complete-async/clang-complete")

   ;暂时没发现什么用处

   ;(setq ac-clang-cflags

   ;  (mapcar (lambda (item)(concat "-I" item))

   ;          (split-string

   ;            "/usr/include/

   ;             ~/Qt/SDK/include/

   ;               /usr/include/c++/4.7/")))

   (setq ac-sources (append '(ac-source-clang-async ac-source-yasnippet) ac-sources))

   (ac-clang-launch-completion-process))

 (defun ac-cc-mode-clang-config ()

     (add-hook 'c-mode-common-hook 'ac-cc-mode-setup)

     (add-hook 'auto-complete-mode-hook 'ac-common-setup)

     (global-auto-complete-mode t))

 (ac-cc-mode-clang-config)