xemacs21-basesupport-el 2009.02.17.dfsg.1-1 (amd64 binary) in ubuntu quantal

 This package contains the base extra elisp files in order to have a
 functioning xemacs21 package.
 .
 The xemacs21-basesupport package contains the
 compiled versions of these files.
 .
 The major reason to install this package is if you want to learn
 elisp or modify the libraries for your specific installation.