Clang on Windows
Is there a good reason why Window Qt distribution still use MinGW instead of Clang ?
Well, mingw is very complete with SDK , debugger and compiler in one , ready to go collection providing
all that is needed. But if that's a good reason or if Clang could be the same i don't know.
Maybe its historical.
Based on this post from the clang documentation, I'd say it's not yet ready to become a new officially supported platform.
However, you should rather ask that question on the interest mailing list. You'll find there Qt developers/maintainers. This forum is more user oriented.