[Interest] Qt Creator licensing for companies with Qt Commercial developers

Andy asmaloney at gmail.com
Tue Mar 31 15:46:45 CEST 2020

> "This is at the moment not listed as an allowed case..."

And this again is here the Qt company is digging it's own grave.

What constitutes a "product"? If a company has one team working on an open
source library and another team using it in a proprietary application -
what then? What if an internal tool uses some code or a library from
proprietary application? What if...

Even a solo developer needs to hire a lawyer before touching anything

Once you start trying to codify all the different scenarios in your
licensing, it becomes toxic and people will avoid it

Andy Maloney  //  https://asmaloney.com
twitter ~ @asmaloney <https://twitter.com/asmaloney>

On Tue, Mar 31, 2020 at 9:36 AM Tuukka Turunen <tuukka.turunen at qt.io> wrote:

> Hi,
> The point of the "Prohibited combination" is to prevent a company or a
> chain of companies (like in a typical subcontracting scenario) from making
> part of the product with non-paid Qt and part with paid. Qt being as
> defined in the commercial license agreement, i.e. including tools and
> framework. This was what the person initiating this mail thread asked
> about. I do agree that it gets complex when one starts including items
> created by an independent third party. This is at the moment not listed as
> an allowed case, even though it is not something we specifically aimed to
> prevent.
> Yours,
>         Tuukka
> On 31.3.2020, 15.03, "Interest on behalf of Giuseppe D'Angelo via
> Interest" <interest-bounces at qt-project.org on behalf of
> interest at qt-project.org> wrote:
>     On 3/31/20 1:22 PM, Tuukka Turunen wrote:
>     > For completely independent projects/products this is fine. Note that
> these really should not be same or in practice the same - or in any way
> depending, relating, using etc each other as defined in the license
> agreement.
>     >
>     > See licensing FAQ question 2.7 athttps://www.qt.io/faq/  and
> License agreement athttps://www.qt.io/terms-conditions/
>     It is still unclear if the usage of Qt _Creator_ for developing some
>     code would cause such code to fall under the restrictions of
> commercial
>     licensing.
>     Here's a few scenarios:
>     1) I have a Qt commercial license. In my project using commercial Qt I
>     want to use a library developed by
>     1a) some other team in my company;
>     1b) someone else.
>     This other library is under a liberal license; does NOT use Qt itself
> in
>     any way; but has been developed using Qt Creator (GPL). Can I use it
> in
>     my product under the commercial license? Or would it fall under the
>     "Prohibited Combination":
>     > “Prohibited Combination” shall mean any means to (i) use, combine,
> incorporate, link or integrate Licensed Software with any software created
> with or incorporating Open Source Qt, (ii) use Licensed Software for
> creation of any software created with or incorporating Open Source Qt
>     Does "created with" here extend to GPL Creator?
>     2) Same as 1, but this time with the library using Qt (as in: using
>     headers, linking against it). Example: a Qt-based library coming from
>     KDE Frameworks, developed using Creator.
>     Thanks,
>     --
>     Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software
> Engineer
>     KDAB (France) S.A.S., a KDAB Group company
>     Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
>     KDAB - The Qt, C++ and OpenGL Experts
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> https://lists.qt-project.org/listinfo/interest
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20200331/5e91e3f1/attachment.html>

More information about the Interest mailing list