[Gambas-user] About the QT licence

[Laurent Carlier]

Le mercredi 9 août 2006 12:23, Daniel Campos a écrit :
> Hi:
>
> I asked to Trolltech about the famous "Gambas QT non-free programs"
> question. Basically, if planning to use Gambas-qt for any non-free
> application and want to distribute it, you have to pay a QT licence
> for programmer, and then, about distribution, this is the answer:
>
> "Both the GPL and our commercial license allow the running of
> commercial software against a GPL'ed Qt library - just the development
> and distribution is affected.
>

The problem isn't running commercial software, but running non-free/closed 
sources) software. GPL doesn't forbid commercial software with GPL part but 
non-free/closed sources software.

> They don't have to distribute any Qt library - if the open source Qt
> version that might be installed on the target computer is the correct
> version and configuration, then that's good enough. The GPL does not
> say anything about running software, only about distributing software.
> However, if no Qt version is installed on the target machine, then
> they must redistribute the commerical Qt libraries; otherwise the GPL
> comes into effect and 'infects' the whole distribution."
>
> I hope it is clear now :-)
>
> Daniel