> postgresql-server-dev-8.4?
ah, the other way around :P
i would think
libpqxx3-dev
or libpqxx-dev, which is probably a meta-package (independent of version nr)
it seems from the error that you don't need the server files, only
libpg, which is a client library
--
"Patriotism is the conviction that your country is superior to all
others because you were born in it." -- George Bernard Shaw