Initial revision

diff --git a/lisp/patcomp.el b/lisp/patcomp.el
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+;;; This function is used by the patch files to update Emacs releases.
+
+(defun batch-byte-recompile-emacs ()
+  "Recompile the Emacs `lisp' directory.
+This is used after installing the patches for a new version."
+  (let ((load-path (list (expand-file-name "lisp"))))
+    (byte-recompile-directory "lisp")))