(require 'irony)
(require 'company-irony)

(add-hook 'c-mode-common-hook
          (lambda()
              (irony-mode t)
          )
         )

(defun my-irony-mode-hook ()
  (define-key irony-mode-map [remap completion-at-point]
    'irony-completion-at-point-async)
  (define-key irony-mode-map [remap complete-symbol]
    'irony-completion-at-point-async))
(add-hook 'irony-mode-hook 'my-irony-mode-hook)
(add-hook 'irony-mode-hook 'irony-cdb-autosetup-compile-options)

(eval-after-load 'company
  '(add-to-list 'company-backends 'company-irony))

(add-hook 'irony-mode-hook 'company-irony-setup-begin-commands)

(global-set-key (kbd "C-<tab>") 'company-dabbrev)
(global-set-key (kbd "M-<tab>") 'company-complete)