autotools-dev 20070306.1 (ia64 binary) in ubuntu gutsy

 This package installs an up-to-date (from CVS) version of config.guess
 and config.sub, used by the automake and libtool packages. It provides
 the canonical copy of those files for other packages as well.
 .
 It also documents in /usr/share/doc/autotools-dev/README.Debian.gz
 best practices and guidelines for using autoconf, automake and
 friends on Debian packages. This is a must-read for any developers
 packaging software that uses the GNU autotools, or GNU gettext.