Hello, and sorry but English is not my mother tongue. 
I do not manage to create a Qt4 project under C::B. That I make new project, it is blocked with the variable of qt4. 
Considering to make echo $QTDIR absolutely nothing gives, I supose that the problem comes from there. 
In the file qt.cbp I put the way /usr/include/qt4 directly, but that does not function either. 
I do not manage to find either the bookshops on my system I qt4 via Apt-get, should I installed rather compile it? 
Can you help me to configure my C::B. 
Thank you 
MaitrePylos