Firebird 2.5.2 stable for all Ubuntu releases is uploaded into ppa

I recommend Ubuntu 12.04 LTS or 14.04 LTS
http://www.firebirdnews.org/?p=7981

The other are builded OK but with some modifications to the Debian scripts

I give some examples of modifications for Lucid and Hardy in the

debian scripts area
http://jimicompot.blogspot.ro/2012/11/firebird-252-for-ubuntu-lucid-is.html

http://jimicompot.blogspot.ro/2012/11/firebird-252-on-ubuntu-hardy.html

Hardy it will be EOL soon in April so for the next Firebird release it

will be skipped

(it doesn't support the quilt 3.0 format and and is hardest to build for )

The older the Distro the harder it it is to build the software for it .