[Development] license question, bds 4 clause license text in qtbase\src\corelib\tools\qdatetime.cpp qt5.4.1 found

Gunnar Roth gunnar.roth at gmx.de
Fri Feb 27 20:29:36 CET 2015

Hi Thiago

>> the requirement to document this  is also more than qt company tells
>> commercial customers. they they if you use modules which are under
>> commrcial license as qtcore pretends to be, you can be silent about
>> anything used in there.
> There's a page in the Qt documentation that lists all the documentation 
> requirements.

Yes that is the page . http://doc.qt.io/qt-5/3rdparty.html <http://doc.qt.io/qt-5/3rdparty.html>  i mentioned and as i wrote this page does not contain
the Copyright (C) 2004, 2005 Daniel M. Duley 
so how should a customer know he needs to mention it?

>> The Digia legal counsel Topi Ruotsalainen tells in
>> https://devdays.kdab.com/wp-content/uploads/2012/Qt_license_options_FINAL_2
>> 0121114.pdf page	14
>> Qt Commercial can be used „silently‟ to create products ● t is No need to mention
>> in documentation, end-user license, to provide source code etc. that LGPL
>> requires

> Because it's not LGPL requirement.

What is NOT lpgl requirement?

> You still have to observe the BSD 2- and 3-clause requirement to reproduce the 
> copyright notice.

Well i read it like this: 
Qt Commercial can be used „silently‟ to create products. No need to mention documentation.
So how is that silent if i need to add a lot of copyright notices which i also have to find myself by scanning the qtbase source code?


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