[Interest] QtCreator - CMAKE_PREFIX_PATH with multiple paths

[Richard Weickelt]

Hi,

>> Is anyone able to tell me if QtCreator is able to have a CMAKE var defined with multiple values?
>>
>> The default value for a project is %{Qt:QT_INSTALL_PREFIX}, is it possible to append more paths?

> I have for Qt Creator itself the following:
> 
> -DCMAKE_PREFIX_PATH:PATH=%{Qt:QT_INSTALL_PREFIX};c:/llvm/msvc

Instead of mashing different paths in CMAKE_PREFIX_PATH, I suggest to define 
one <PackageName>_ROOT variable per dependency. That's more explicit and IMO 
much easier to maintain. Using one global CMAKE_PREFIX_PATH separated with 
semicolons feels a bit old-fashioned.