Re: Improving communication between GNU Emacs and XEmacs

[Richard Stallman]

Since we cannot use the code in XEmacs for lack of legal papers from
the authors (and even records about who the authors were), there is
not much possibility for cooperation with you to be useful for us.  I
don't see sense in helping you design changes to code we can't use
anyway.

In order for code to be available to you and to us, it has to start
from the code in Emacs (or else from zero).  On that sort of project,
it might make sense for us to work together.