xemacs21-support binary package in Ubuntu Focal amd64

 XEmacs is a full fledged programming language with a mail reader,
 news reader, info browser, web browser, calendar, specialized editor
 for more programming languages and other formats than most people
 encounter in a lifetime, and much more.
 .
 Support and architecture independent files for XEmacs 21.4.22. This
 includes the files found in etc and all required elisp library files
 (mostly compiled (.elc files), but a few uncompiled (.el files)).

Source package