...
Note, the scope should be "compile" if you're using the CAS Client APIs.
mod_auth_cas
Mod_auth_cas has seen significant adoption and development in the past
several months. 1.0.8 is now included in Debian (lenny-backports and
squeeze) and Ubuntu (karmic), so installation is as simple as 'apt-get
install libapache2-mod-auth-cas'.
Work progresses toward an eventual 1.0.9 release of mod_auth_cas. Trunk
now includes support for SAML validation and logout, and includes
various performance and bug fixes. The mod_auth_cas developers are
seeking testers to validate the new functionality before tagging a 1.0.9
release, and as always, are looking for other developers interested in
working on this Apache module.