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Re: Emacs and XEmacs coexisting

>   We need to co-ordinate using update-alternatives for the following
> binaries:

Yep.  Pick threshold values and I'll set them in mine too.

> 1) We have some of the same info files in /usr/info and in
>    /usr/info/dir.  I'm not sure what to do about that.

Proposal: /usr/info/emacs and /usr/info/xemacs subdirs (or name
prefixes if info can't handle subdirs, but I know it can handle full
pathnames so that should work), and only put a top level "emacs" and
"xemacs" entry in with update-info... 

> 2) Byte-compiling.  XEmacs can't read the byte-compiled versions that
>    GNU Emacs puts out.

I heard a rumour that the only reason for that was that this bit of
test code in each file:
(if (and (boundp 'emacs-version)
	 (or (and (boundp 'epoch::version) epoch::version)
	     (string-lessp emacs-version "19.29")))
    (error "`.emacs.el' was compiled for Emacs 19.29 or later"))

fails for xemacs version numbers.  If I patched emacs19 to make the
test broader, or at least handle xemacs specifically in the failure
branch, would that suffice?  (I'm told patches have been sent in for
this but I'm not sure where....)

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