@Norzka said in Problems with building qt from source (it doesn't generate lib files):
D:\Libraries\Qt\6.6.0\Build\plugins\styles\qwindowsvistastyle.lib
Hang on, why do you expect a .lib file for a plugin, that is supposed not to be linked to (it is loaded at runtime)? There should be a .dll, but not a .lib file.
Do you (try to) explicitly link against the plugin nevertheless, in your project file? Or do you somehow try a static build (which would require Qt to be built statically, too)?