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

[Konrad Rosenbaum]

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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