(switch-to-lisp): Sometimes turn on pop-up-frames.

diff --git a/lisp/progmodes/inf-lisp.el b/lisp/progmodes/inf-lisp.el
index b56b9a5dd5847555f88505581c61418c6f7c5e5c..870d3f944b7ebd53cd055a2926431a3e592cb5da 100644 (file)
--- a/lisp/progmodes/inf-lisp.el
+++ b/lisp/progmodes/inf-lisp.el
@@ -361,7 +361,12 @@ Prefix argument means switch to the Lisp buffer afterwards."
 With argument, positions cursor at end of buffer."
   (interactive "P")
   (if (get-buffer inferior-lisp-buffer)
-      (pop-to-buffer inferior-lisp-buffer)
+      (let ((pop-up-frames
+            ;; Be willing to use another frame
+            ;; that already has the window in it.
+            (or pop-up-frames
+                (get-buffer-window inferior-lisp-buffer t))))
+       (pop-to-buffer inferior-lisp-buffer))
     (error "No current inferior Lisp buffer"))
   (cond (eob-p
         (push-mark)