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

[tomek]

Hi Tuukka,

so if the company's product is say modern car's head unit which is built
from many, many blocks and to build one of those (UI) Qt with commercial
license was used then hundreds or thousands of developers in the same
company or many subcontractor companies developers are forbidden to use Qt
Creator based on GPL license as their IDE of choice to C/C++ code
development within that product (but for other modules not relying on Qt at
all, physically stored in different repos/subrepos)? From the
company/project management perspective there will be most probably many
projects (per module/block) but in the end all will be bundled into one
package which will land on the blackbox so according to your explanation it
will be license violation, right?

Thanks,
Tomasz/

śr., 1 kwi 2020 o 07:24 Tuukka Turunen <tuukka.turunen at qt.io> napisał(a):

> Hi,
>
> To me your example does not sound problematic assuming that your
> application is like a typical app - a clearly different thing than the
> store that sells apps (the store sells a lot of different apps and your is
> in no way relevant for operating the store etc).
>
> Also, for any particular real case at hand, you can ask if something is
> allowed for you or not.
>
> Yours,
>
>         Tuukka
>
>
> On 31.3.2020, 23.15, "Interest on behalf of Krzysztof Kawa" <
> interest-bounces at qt-project.org on behalf of krzysiek.kawa at gmail.com>
> wrote:
>
>     > The key point is: The Qt Company, just like Trolltech initially and
> other companies in between, does not want mixing open-source Qt and
> commercial Qt.
>     > Reason is simple: if mixing was allowed, many companies would use it
> to pay less for their use of Qt.
>     > It is unfortunate that also real open-source projects may be
> affected in some cases. Majority of users are not affected in any way.
>
>     This got me thinking about quite a simple case that doesn't seem so
>     simple now: Lets say I make a game using open-source licensed Qt, or
>     even just open-source licensed Qt Creator. After few years of
>     development I decide to publish the game. It just so happens that my
>     publisher has a storefront app using commercial Qt or even just
>     written in Qt Creator under commercial license. To put my app in their
>     store there's usually some API, config file or whatever that
>     technically makes it mixing the two, even if not through Qt based
>     interface. Does that mean I can't publish my app in that store? If
>     that's the case then this pretty much makes Qt dead for any sort of
>     game development because there's no possible way to know which
>     publishers are gonna use what tech and under what license by the time
>     you ship. Same thing goes for any app distributed through external
>     stores I guess and I know at least few that use Qt.
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