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

Thiago Macieira thiago.macieira at intel.com
Fri Feb 27 20:10:14 CET 2015

On Friday 27 February 2015 19:40:51 Gunnar Roth wrote:
> Hi Thiago,
> should i just take your word or do you also have a link for this?


> 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 

> 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 ● No need to mention
> in documentation, end-user license, to provide source code etc. that LGPL
> requires

Because it's not LGPL requirement.

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

> Well that then seems to not be true…
> Regards,
> Gunnar
> Ps.: And then there is also the modified freetype code in qtgui’s raster
> code which also has the freetype license and one need to mention freetype
> in your documentation, even if you don’t use the 3rdparte ferrotype lib
> provided by qt ( on windows you don’t need this for example	)

Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center

More information about the Development mailing list