I've the trunk of OE checked out on my Linux PC. But I download prebuilt images to the gumstix, which are available at Gumstix.net.

Now I have built a OE basic image (following this steps http://www.gumstix.net/Software/view/Getting-started/Setting-up-a-build-environment/111.html)

But it generates a glibc-based Image fot the Gumstix not a uclibc. Which is the one required for QT?