Re: Can this be used for a non-GPL feasibility study?

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Re: Can this be used for a non-GPL feasibility study?
by Brian on Tuesday 17/Jun/2003, @13:09

I don't understand your dilema. You may use GPL code internally without releasing it. As long as this is just a feasability study, you should have absolutely no constraints. If you decide to bundle your app or sell the app then you have to make your application GPL. The GPL makes it easy to operate below the radar until you are ready to sell your app. It sounds like that is the time you would want to purchase your commercial license or better yet GPL your code!. Just my 2 cents.
Brian

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Re: Can this be used for a non-GPL feasibility stu
by Rob on Tuesday 17/Jun/2003, @14:47

I thought QT specifically said you can't use the GPL version to develop an app and then pay up when you decide to release a non-GPL version.

But other posters mentioned a QT evaluation program, so I guess this problem's been eliminated.

Thanks,
Rob

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Re: Can this be used for a non-GPL feasibility stu
by Jerzu on Wednesday 18/Jun/2003, @07:31

GPL is GPL and Trolltech cannot prohibit using GPL version for any internal purposes, whatever they are. They are just unhappy when 5 programmers create commercial QT application, then they buy 1 licence, recompile application and release it. Such a behaviour seems legal to me, but a bit unfair, of course.

Jerzu

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Re: Can this be used for a non-GPL feasibility stu
by rilla on Wednesday 18/Jun/2003, @08:58

They can't put restrictions up the GPL, but they can put any restrictions they want on their own license for Qt Commercial. They can say, "Qt Commercial can't be used in the development of an application that has previously been developed by Qt Free Edition without keeping the app open sourced..."

Of course, I've never actually heard trolltech going after someone for doing this...

> They are just unhappy when 5 programmers create commercial QT application, then they buy 1 licence, recompile application and release it.

Yeah, this policy was made to stop this from happening.

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Re: Can this be used for a non-GPL feasibility stu
by Stefan on Friday 20/Jun/2003, @08:17

Actually, there was recently a discussion on the Qt mailing list covering that topic.

The result was the following:

If parts of an application have been developed using Qt/Free you can't license that application with Qt/Commercial.

This was also confirmed by Dimitri from Trolltech. However, this seems hard to enforce. Still if you have product that uses Qt/Commercial and it somehow turns out that parts of this application have been developed using Qt/Free, you're violating the license terms and should probably call your lawyer ;)

--
Stefan

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