See https://bugzilla.redhat.com/show_bug.cgi?id=1122157. In byte-compile-insert-header, we add a comment like this to .elc files: ;;; compiled by alfred.e.neumann(a)notentirelysane.com on Fri Mar 28 13:09:15 2014 ;;; from file /home/alfred/Projects/xemacs/xemacs-21.5/lisp/font-mgr.el ;;; emacs version 21.5 (beta34) "kale" 8ef8d5e7c920+ XEmacs Lucid. ;;; bytecomp version 2.28 XEmacs; 2009-08-09. ;;; optimization is on The issue is that first line, which identifies who did the building and when. If that one line is eliminated, then multiple distribution builds can produce identical .elc files, which is desirable for several reasons (e.g., checking that builds on different architectures produce the same results). Would anyone object to removing that first line? The second line would be altered to add the word "compiled" to the front; i.e., the example above would become: ;;; compiled from file /home/alfred/Projects/xemacs/xemacs-21.5/lisp/font-mgr.el ;;; emacs version 21.5 (beta34) "kale" 8ef8d5e7c920+ XEmacs Lucid. ;;; bytecomp version 2.28 XEmacs; 2009-08-09. ;;; optimization is on Regards, -- Jerry James http://www.jamezone.org/ _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://lists.xemacs.org/mailman/listinfo/xemacs-beta