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diff --git a/lisp/obsolete/patcomp.el b/lisp/obsolete/patcomp.el
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+;;; patcomp.el --- used by patch files to update Emacs releases -*- no-byte-compile: t -*-
+
+;; This file is part of GNU Emacs.
+
+;; Obsolete-since: 24.2
+
+;;; Commentary:
+
+;;; Code:
+
+(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")))
+
+(defun batch-byte-compile-emacs ()
+  "Compile new files installed in the Emacs `lisp' directory.
+This is used after installing the patches for a new version.
+It uses the command line arguments to specify the files to compile."
+  (let ((load-path (list (expand-file-name "lisp"))))
+    (batch-byte-compile)))
+
+;;; patcomp.el ends here