On Wed, Apr 07, 2010 at 07:01:39PM +0200, Dave Neary wrote: > Hi Dengyi, > > Dengyi Wang wrote: > > From http://qt.nokia.com/products/licensing, I noticed QT have 3 > > licenses: Commercial/LGPL v2.1/GPL V3. > > > > We all knew Meego UI applications are based on QT. If someone wants to > > develop an "closed source" UI application, then he/she must purchase the > > commercial license. Is it correct understanding? > > No - they would choose between using QT licenced under LGPL v2.1 or > paying a commercial licence fee. Both of these licences allow you to > write software depending on the library without publishing the source > code under the GPL. If you redistribute QT, then you should ensure that > you do not redistribute it under the GPL, or your users will be able to > ask you to publish the source code. > > I don't know what you would get extra with the commercial licence, or > what you would lose when choosing LGPL v2.1, which might help you make > up your mind, though.
Embedding Qt or parts thereof directly in your application without being required to publish the .o files. And you can of course modify Qt for your purposes without having to publish any sources at all. For the MeeGo case, there are no differences between the commercial Qt license or the LGPL one, because programs only link dynamically against an unmodified Qt version. -- Julian Andres Klode - Debian Developer, Ubuntu Member See http://wiki.debian.org/JulianAndresKlode and http://jak-linux.org/.
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