According to qt.nokia.com, Qt is a \"cross-platform application and UI framework\", allowing you to \"write code once to target multiple platforms\". The Qt SDK is a \"complete
Last time I was using Qt, and it was years ago, you had to compile on every platform you wanted a binary for. Of course you could cross-compile but I think that it'd be up to you to set up such a thing.
Maybe someone else will provide a better question, but I don't think you are missing anything.