[Qt-interest] Qt 4.5 Open Source (Windows) -- is it legal to redistribute the Qt DLLs?

[Ed Sutton]

I apologize as I did not mean to respond to your personal address.
 
> Your first obligation is to tell your customers/downloaders that it is 
> under LGPL and where to find the sources to it.

Please confirm. LGPL means that if you make a GUI application using the LGPL version of the QTCreator IDE tool, then you must make your application source code publicly available?

Thanks in advance,

-Ed

> -----Original Message-----
> From: qt-interest-bounces at trolltech.com [mailto:qt-interest-
> bounces at trolltech.com] On Behalf Of Konrad Rosenbaum
> Sent: Friday, March 20, 2009 1:42 PM
> To: qt-interest at trolltech.com
> Subject: Re: [Qt-interest] Qt 4.5 Open Source (Windows) -- is it legal to
> redistribute the Qt DLLs?
> 
> On Friday 20 March 2009, R. Reucher wrote:
> > I just don't want to be on the illegal side, so I thought I might ask
> > before I do... am I legally entitled to redistribute the Qt DLLs which
> > are required to run my application in a binary Win32 package?
> 
> Of course. It is under LGPL, so you can legally distribute source and
> binaries.
> 
> Your first obligation is to tell your customers/downloaders that it is under
> LGPL and where to find the sources to it. If you change Qt itself you also
> have to offer/distribute your changes to Qt in source.
> 
> Your second one is to allow your customers/downloaders to re-link your
> application with a new version of Qt. You'll be fine if you just use the Qt
> DLLs just as everybody else does.
> 
> > Of course, the application is open source as well... and the DLLs were
> > built from Qt 4.5 (Open Source) using VC++ Express 2008.
> 
> Then there should be no problem. Most projects distribute the binaries
> together and the sources together (ie. in the same download directory).
> 
> 
> 	Konrad
> 
> PS.: IANAL
> 
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