hallo philippe,
SlackBuild generator is a great help but... not solve. 
now i know sintax for the tqt libs, but something in "configure" link to old qt3.
the build end with:

checking for KDE... configure: error:
I can't find the designer plugins. These are required and should have been installed by tdelibs

(tqt designer is in  /usr/lib64/tqt/plugins/designer)