[CMake] creation of cxx in QT4 gui

[eial at cs.bgu.ac.il]

hello.
I have a question, I'm assuming that QT4_WRAP_CPP is creating the cxx files, on a project of mine, I have 3 classes, two of them have a ui file, all headers are in GUI_HPP list, when I print the content of the variable, I see the two headers that have a ui file, when I run it via QT4_WRAP_CPP I get 3 cxx files for the one class that doesn't have a ui file.
afaiu, that file doesn't need a cxx file, my question is, why is that happening? how can I solve it?