I faced the following issue: When I try to execute the command "make clean" after I build Qt, it removes all the .pdb files (Visual Studio symbol files) and I can't debug Qt if it is needed. However if I do not call "make clean" after Qt build I have a lot of objective files and other unnecessary stuff. So once it is not possible to execute "make clean" it should be possible to execute "make install" but by default it installs Qt exactly in the same build folder and can't change that. So is it any way to execute "make clean" without deleting .pdb files or "make install" in another folder ?