Unloading support for misearch.

* lisp/misearch.el (multi-isearch-unload-function): New function.
(misearch-unload-function): New alias.

Fixes: debbugs:19566

lisp/ChangeLog

@@ -17,6 +17,9 @@
 	* desktop.el (desktop-read): Do not call desktop-clear when no
 	desktop file is found.  (Bug#18371)
 
+	* misearch.el (multi-isearch-unload-function): New function.
+	(misearch-unload-function): New alias.  (Bug#19566)
+
 2015-01-17  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* emacs-lisp/eieio-core.el (eieio--class-constructor): Rename from

lisp/misearch.el

@@ -377,6 +377,25 @@ whose file names match the specified wildcard."
     (goto-char (if isearch-forward (point-min) (point-max)))
     (isearch-forward-regexp nil t)))
 
+(defun multi-isearch-unload-function ()
+  "Remove autoloaded variables from `unload-function-defs-list'.
+Also prevent the feature from being reloaded via `isearch-mode-hook'."
+  (remove-hook 'isearch-mode-hook 'multi-isearch-setup)
+  (let ((defs (list (car unload-function-defs-list)))
+	(auto '(multi-isearch-next-buffer-function
+		multi-isearch-next-buffer-current-function
+		multi-isearch-current-buffer
+		multi-isearch-buffer-list multi-isearch-file-list)))
+    (dolist (def (cdr unload-function-defs-list))
+      (unless (and (symbolp def)
+		   (memq def auto))
+	(push def defs)))
+    (setq unload-function-defs-list (nreverse defs))
+    ;; .
+    nil))
+
+(defalias 'misearch-unload-function 'multi-isearch-unload-function)
+
 
 (provide 'multi-isearch)
 (provide 'misearch)