Re: GPL and using many licences
- From: mschaef@xxxxxxxxxxxx (MSCHAEF.COM)
- Date: Fri, 30 Sep 2005 08:26:16 -0500
In article <1f54niphm1ig8$.dlg@xxxxxxxxxxxxxxxxx>,
Piotr 'Qertoip' W³odarek <qer1@xxxxx> wrote:
>
>I want to use library licensed under GPL. Therefore I have to publish my
>source code under GPL as well.
>
>May I, in addition, publish my source code under other license, i.e. MIT?
>
>Of course I've got GPL license text, but I want to know your opinion, since
>there are many misuderstoods in this subject.
As long as you own the copyright to all of the code, you can release it
however you like. Trolltech does this with QT:
http://www.trolltech.com/products/qt/licensing.html
However, if you let other people submit code to your open source project,
you do not initially own the copyright, they do. They get to set terms on
the code they write, just as you get to set terms on the code you write.
Consequently, they get to object to your selling their code as part of
your closed source version. Or, they could demand a fee, or whatever...
The FSF is strict about obtaining copyright assignments from contributors
to their projects. Part of the reason is: "That way we can be sure that
all the code in FSF projects is free code, whose freedom we can most
effectively protect, and therefore on which other developers can
completely rely." -- http://www.gnu.org/licenses/why-assign.html
-Mike
--
http://www.mschaef.com
.
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