Makes c-mode works ???

but very slow

.emacs

@@ -1,3 +1,4 @@
+;(toggle-debug-on-error)
 (setq gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3")
 (custom-set-variables
  ;; custom-set-variables was added by Custom.
@@ -86,25 +87,6 @@
 				  indent-relative-maybe))
 		  (setq indent-tabs-mode nil))
 	  ad-do-it))
-  (defmacro smart-tabs-advice (function offset)
-	`(progn
-	   (defvaralias ',offset 'tab-width)
-	   (defadvice ,function (around smart-tabs activate)
-		 (cond
-		  (indent-tabs-mode
-		   (save-excursion
-			 (beginning-of-line)
-			 (while (looking-at "\t*\\( +\\)\t+")
-			   (replace-match "" nil nil nil 1)))
-		   (setq tab-width tab-width)
-		   (let ((tab-width fill-column)
-				 (,offset fill-column)
-				 (wstart (window-start)))
-			 (unwind-protect
-				 (progn ad-do-it)
-			   (set-window-start (selected-window) wstart))))
-		  (t
-		   ad-do-it)))))
   (smart-tabs-advice c-indent-line c-basic-offset)
   (smart-tabs-advice c-indent-region c-basic-offset)
   (smart-tabs-add-language-support cmake cmake-mode-hook
@@ -138,9 +120,6 @@
   (smart-tabs-insinuate 'c 'javascript 'c++ 'cmake 'nxml 'protobuf 'html 'glsl)
   )
 
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; magit
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
 (use-package magit
   :commands (magit-status)
@@ -153,46 +132,49 @@
   (global-company-mode t)
   )
 
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; CMake
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
 (use-package cmake-mode
   :config
   (setq cmake-tab-width 4)
   )
 
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+(use-package company-irony
-;; Company
+  :after (company irony)
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;  :config
+;  (add-to-list 'company-backends 'company-irony)
+  )
+
+(use-package company-irony-c-headers
+  :after (company irony)
+;  :config
+;  (add-to-list 'company-backends 'company-irony-c-headers)
+  )
 
 (use-package irony
-  :hook (c-mode-common)
   :config
   (push 'glsl-mode irony-supported-major-modes)
   (push 'protobuf-mode irony-supported-major-modes)
   (push 'opencl-mode irony-supported-major-modes)
-  (company-irony-setup-begin-commands)
-  (irony-cdb-autosetup-compile-options)
-  '(add-to-list
-	'company-backends
-	'(company-irony-c-headers company-irony company-yasnippet))
-
   )
 
 (use-package srefactor
-  :hook (c-mode-common)
   :bind (:map c-mode-map
 		 ("M-RET" . srefactor-refactor-at-point)
 		 :map c++-mode-map
 		 ("M-RET" . srefactor-refactor-at-point))
   )
 
+
 (use-package yasnippet
-  :hook (c-mode-common)
+  :after (company)
   :bind ( :map yas-minor-mode-map
 			   ("TAB" . nil)
 			   )
+  :config
+ ; (add-to-list 'company-backends 'company-yasnippet)
+  )
+
+(use-package yasnippet-snippets
+  :after (yasnippet)
   )
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -224,7 +206,15 @@ header"
   (require 'compile)
   (global-set-key (kbd "C-x f") 'find-file-at-point)
   (c-set-offset 'inextern-lang 0)
+  (eval-after-load 'company
+	'(add-to-list
+	  'company-backends
+	  '(company-irony company-irony-c-headers company-yasnippet)))
   (smart-tabs-mode)
+  (irony-mode)
+  (yas-minor-mode-on)
+  (company-irony-setup-begin-commands)
+  (irony-cdb-autosetup-compile-options)
   )
 (add-hook 'c-mode-common-hook 'my-c-common-hook)