[Lazarus] LCLWidgetType:=qt5 not to configure in source code ?

[John Landmesser]

I can set LCLWidgetType:=qt5 in an extra build mode. But i was asking
myself why not use something like this:

> unit Config;
>
> interface
>
> {$IFDEF linux}
> const
>   WidgetType = 'qt5';
> {$ELSE}
>   const
>   WidgetType = 'gtk2';
> {$ENDIF}
>
> implementation
>
> end.

  include this unit in uses clause of mainform ... has no effect !

Ok, but why ?

Tipps are welcome ...

John Landmesser