--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/prim/update-elc.el	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,56 @@
+;; This file is part of XEmacs.
+
+;; XEmacs is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; XEmacs is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with XEmacs; see the file COPYING.  If not, write to the Free
+;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Synched up with: Not in FSF.
+
+;; Byte compile the .EL files necessary to dump out xemacs.
+;; Use this file like this:
+;;
+;; temacs -batch -l ../lisp/prim/update-elc.el $lisp
+;;
+;; where $lisp comes from the Makefile.  .elc files listed in $lisp will
+;; cause the corresponding .el file to be compiled.  .el files listed in
+;; $lisp will be ignored.
+;;
+;; (the idea here is that you can bootstrap if your .ELC files
+;; are missing or badly out-of-date)
+
+(setq update-elc-files-to-compile
+      (delq nil
+	    (mapcar (function
+		     (lambda (x)
+		       (if (string-match "\.elc$" x)
+			   (let ((src (substring x 0 -1)))
+			     (if (file-newer-than-file-p src x)
+				 (progn
+				   (and (file-exists-p x)
+					(null (file-writable-p x))
+					(set-file-modes x (logior (file-modes x) 128)))
+				   src))))))
+		    ;; -batch gets filtered out.
+		    (nthcdr 3 command-line-args))))
+
+(if update-elc-files-to-compile
+    (progn
+      (setq command-line-args
+	    (cons (car command-line-args)
+		  (append '("-l" "loadup-el.el" "run-temacs"
+			    "-batch" "-q" "-no-site-file" "-f"
+			    "batch-byte-compile")
+			  update-elc-files-to-compile)))
+      (load "loadup-el.el")))
+
+(kill-emacs)