libkdcraw configure problem

Anybody had any success building libkdcraw lately? I'm using the latest from GIT, with tqt etc installed but I'm getting the following during 'configure'. The system is x86_64.

checking for Qt... configure: error: Qt (>= Qt 3.2 and < 4.0) (headers and libraries) not found. Please check your installation!

As far as I can tell my system is setup correctly, other libraries/dependencies (avahi-tqt, python-tqt, sip4-tqt etc, etc) find the required libs & headers. I guess I'm doing something stupid or missing something peculiar to libkdcraw?

Mike.