lisp/progmodes/which-func.el (which-func-mode): Fix bug#10428.

Turn into a non-interactive function and mark as obsolete.

lisp/ChangeLog

+2012-01-07  Juanma Barranquero  <lekktu@gmail.com>
+
+	* progmodes/which-func.el (which-func-mode): Turn into a
+	non-interactive function and mark as obsolete (bug#10428).
+
 2012-01-06  Chong Yidong  <cyd@gnu.org>
 
 	* files.el (hack-dir-local-variables-non-file-buffer): Add doc.

lisp/progmodes/which-func.el

@@ -229,7 +229,9 @@ It creates the Imenu index for the buffer, if necessary."
 	 (error "Error in which-func-update: %S" info))))))
 
 ;;;###autoload
-(defalias 'which-func-mode 'which-function-mode)
+(defun which-func-mode (&optional arg)
+  (which-function-mode arg))
+(make-obsolete 'which-func-mode 'which-function-mode "24.1")
 
 (defvar which-func-update-timer nil)