LGPL License and modified source code
Good morning everybody,
I am using Qt 4.6.2 with the LGPL license in a commercial product. For testing this product I used the QtTest module and the QSignalSpy class. The QSignalSpy enforces a Qt::DirectConnectoin which makes a stress test crash (see https://bugreports.qt-project.org/browse/QTBUG-2842 ).
So I copied the header file qsignalspy.h and substituted Qt::DirectConnection with Qt::QueuedConnection. This solved the problem. The new header file called just signalspy.h with the class SignalSpy is only used in the unit tests for my product.
My question is, if I have anything to do to satisfy the LGPL (because of the minor change)? Do I have to provide the modified sourcecode? And if so, to whom?
Thanks in advance!
if you're don't publish your modifications with your product you're not violating the LGPL ... for your personal use you can modify anything you want.
Both GPL and LGPL talk about distributing modified sources to users. You don't have to publish them world-wide. And since those are tests, basically you and your co-workers are those users ;)
In this case, additionally, I think Qt-exception works and you don't need to do anything, just like raven-worx said.