I have KDE 3.3.0 installed with X.org. Got Kopete source, running ./Configure gives the following error:
.....
checking for kde... /opt/kde/lib headers /opt/kde/include
Checking if UIC has KDE plugins available ... no
configure: error: you need to install kdelibs first.
Needless to say, that I do have kdelibs package installed.
you have to install kdelibs and kdelibs-devel packages. If your distro provides packages, like mdk, suse etc, then go to their websites and download it. Else, you have to compile from source.