Qt and the GPL

[David Johnson]

On Mon, 04 Sep 2000, kmself at ix.netcom.com wrote:

> > The reason it would have been impossible is that it would cause a huge
> > number of Qt based applications, including major portions of KDE, be
> > become illegal. With a GPL/Proprietary dual-license one has to either
> > write a GPL application or pay for a license. This would leave all of
> > the BSD, MIT, Artistic and even LGPL authors out in the cold.
> 
> No.  BSD, MIT, Artistic, and LGPL are all convertible to GPL.  You'd
> leave out those people who were using these licenses to interoperate
> with software licensed under non-GPL terms as a single work.

Hmmm, this isn't how I understand it. One can link from a GPL
application to a BSD library, but not from a BSD application to a GPL
library. This is because the application is a derivative of the
library according to the GPL, and all derivatives of GPL code have to
be GPL as well. 

In any case, it would also leave out the MPL and QPL users, of which
there is a significant number of the latter.

-- 
David Johnson
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