compiling qt/kde apps (can not find Qt (>= Qt 3.0) (library -mt) )

[Wolfgang Mader <debian-lists@brain-frog.de>]

Hello list,

I know this was questioned in the past but I think I read the according mails 
and didn't get along...

OK here is my problem.

I want to compile the chess programm knights on my sid box.
I have installed:
 libqt3-compat-headers 
 libqt3-headers
 libqt3-mt-dev

and I invoced ./configure this ways:
./configure

./configure --with-qt-dir=/usr --with-qt-includes=/usr/include/qt3/ 
 --with-qt-libraries=/usr/lib/qt3/

./configure --with-qt-dir=/usr/share/qt3/ 
 --with-qt-includes=/usr/share/qt3/include 
 --with-qt-libraries=/usr/share/qt3/lib/

environment variables:
echo $KDEDIR /usr/
echo $QTDIR /usr/

qt libs are to find in:
/usr/lib
 /usr/include/qt3
or
/usr/share/qt3/lib
 /usr/share/qt3/include

but the only answer I get from ./configure is:
checking for Qt... configure: error: Qt (>= Qt 3.0) (library -mt) not found. 
Please check your installation!
For more details about this problem, look at the end of config.log.
Make sure that you have compiled Qt with thread support!

Can you please help me out?

Thank you - Wolfgang