bitbake meta-toolchain-qte. The generated SDK will contains the cross compiler, depedencies needed to recompile Qt Embedded Linux and Qt Emebedded Linux itself.
Building Qt applications for the software is as easy as sourcing a script and invoking qmake2. More documentation can be found in a new section of the OpenEmbedded User manaul.
Using SDKs produced by OpenEmbedded can greatly improve the productivity of development teams as they can start developing their applications right away and in contrast to classic SDKs if a new dependency is needed it can be easily installed using the