defadvice is obsolete in Emacs 30.

--- gnuserv-3.12.8/gnuserv-compat.el
+++ gnuserv-3.12.8/gnuserv-compat.el
@@ -112,38 +112,35 @@
   ;; can do!  If the device doesn't represent a live frame, we create
   ;; the frame as requested.
 
-  (defadvice make-frame (around
-			 gnuserv-compat-make-frame
-			 first
-			 (&optional parameters device)
-			 activate)
+  (defun gnuserv-compat-make-frame (orig-fun &optional parameters device)
     (if (and device
 	     (frame-live-p device))
 	(progn
 	  (if parameters
 	      (modify-frame-parameters device parameters))
-	  (setq ad-return-value device))
-      ad-do-it))
+	  device)
+      (funcall orig-fun parameters)))
+
+  (advice-add 'make-frame :around #'gnuserv-compat-make-frame)
 
   ;; Advise `delete-frame' to run `delete-device-hook'.  This might be a
   ;; little too hacky, but it seems to work!  If someone actually tries
   ;; to do something device specific then it will probably blow up!
-  (defadvice delete-frame (before
-			   gnuserv-compat-delete-frame
-			   first
-			   nil
-			   activate)
+  (defun gnuserv-compat-delete-frame (&optional frame _force)
     (run-hook-with-args 'delete-device-hook frame))
 
+  (advice-add 'delete-frame :before #'gnuserv-compat-delete-frame)
+
   ;; Advise `filtered-frame-list' to ignore the optional device
   ;; argument.  Here we don't follow the mapping of devices to frames.
   ;; We just assume that any frame satisfying the predicate will do.
-  (defadvice filtered-frame-list (around
-				  gnuserv-compat-filtered-frame-list
-				  first
-				  (predicate &optional device)
-				  activate)
-    ad-do-it))
+  (defun gnuserv-compat-filtered-frame-list (orig-fun predicate
+						      &optional _device)
+    (funcall orig-fun predicate))
+
+  (advice-add 'filtered-frame-list
+	      :around #'gnuserv-compat-filtered-frame-list)
+  )
 
 
 ;; Emulate XEmacs devices.  A device is just a frame. For the most