[Ctk-developers] Qt licenses model

[Tarbox, Lawrence]

I don't think that there is any problem with redistribution of the binary Qt runtime environment with BSD-licensed code.  Qt Software, I believe, expressly allows such redistribution.

In fact, there is no problem with redistributing the rest of the LGPL Qt code, as long as we keep it logically separate from the BSD-licensed code (i.e., strictly a 'linked to' relationship in keeping with the LGPL provisions), and as long as we provide a means for people to get the source for the LGPL Qt code.

Lawrence

-----Original Message-----
From: ctk-developers-bounces at commontk.org [mailto:ctk-developers-bounces at commontk.org] On Behalf Of Stephen Aylward
Sent: Thursday, November 12, 2009 08:35 AM
To: Will Schroeder
Cc: ctk-developers at commontk.org
Subject: Re: [Ctk-developers] Qt licenses model

I second Will's comments.

We can link with LGPL libraries without corrupting our BSD-like
license.   The same is not true for GPL libraries - they consume any
code they touch.

We cannot redistribute LGPL Qt, but we can derive from and link with it.

s

On Thu, Nov 12, 2009 at 8:07 AM, Will Schroeder
<will.schroeder at kitware.com> wrote:
> We will not touch GPL. We use the LGPLd Qt in most applications we create,
> it should not be a problem mixing it into our BSD-licensed components.
> Will
>
> On Thu, Nov 12, 2009 at 4:43 AM, Marco Viceconti <viceconti at tecno.ior.it>
> wrote:
>>
>> I would like to open another discussion thread, parallel to the one we
>> started on Qt core.  Currently Qt is available under two possible open
>> source licenses: Qt GNU LGPL v. 2.1 and Qt GNU GPL v. 3.0.
>> http://qt.nokia.com/products/licensing
>>
>> If I understand correctly the code is the same, the access rules are the
>> same, so I am not sure why one would choose GPL which is more restrictive
>> than LGPL.  Can someone clarify this to me?
>>
>> Secondly, having agreed that CTK will be BSD-like, can anyone confirm me
>> that by using a LGPL library to develop CTK we shall not break the BSD-like
>> license we plan to adopt?
>>
>> Thanks
>>
>> Marco
>>
>>
>>
>> --------------------------------------------------
>> MARCO VICECONTI, PhD                             (viceconti at tecno.ior.it)
>> Laboratorio di Tecnologia Medica              tel.   39-051-6366865
>> Istituto Ortopedico Rizzoli                            fax.
>> 39-051-6366863
>> via di Barbiano 1/10, 40136 - Bologna, Italy
>>
>> Tiger! Tiger! Burning bright in the forest of the night,
>> what immortal hand or eye could frame thy fearful symmetry?
>> --------------------------------------------------
>> Opinions expressed here do not necessarily reflect those of my employer
>>
>>
>>
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>
>
>
> --
> William J. Schroeder, PhD
> Kitware, Inc.
> 28 Corporate Drive
> Clifton Park, NY 12065
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Director of Medical Imaging Research
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