extern struct frame *selected_frame;
extern struct frame *last_nonminibuf_frame;
-extern struct frame *make_terminal_frame ();
-extern struct frame *make_frame ();
-extern struct frame *make_minibuffer_frame ();
-extern struct frame *make_frame_without_minibuffer ();
+extern struct frame *make_terminal_frame P_ ((void));
+extern struct frame *make_frame P_ ((int));
+extern struct frame *make_minibuffer_frame P_ ((void));
+extern struct frame *make_frame_without_minibuffer P_ ((Lisp_Object,
+ struct kboard *,
+ Lisp_Object));
+extern int other_visible_frames P_ ((struct frame *));
extern Lisp_Object Vframe_list;
extern Lisp_Object Vdefault_frame_alist;