[Qt-interest] Question about the license of Qt-Creator

[JJDaNiMoTh]

On Friday 25 June 2010 18:41:37 Kari Laine wrote:
> Hi,
> 
> I am considering writing a development environment for the PIC BV513
> from Byvac. My idea is to take parts of the Qt-Creator and add my
> own stuff.
> 
> How can I do this without breaking the license?
> 
> For example I need to change the name of the program - this is probably ok.
> 
> But then I will have codebase that is heavily loaned from Qt-creator and
> modified that is. And then there are my own code. How on earth I can
> attribute the bit and pieces to whom they belong?
> 
> Would be ok to have a standard header on each file saying someting in line
> "Copyright Nokia - heavily modified by me" ?
> 
> Any ideas?

Here [1] seems Qt-Creator is released under LGPL v2.1(except 3rd party code), 
so you can modify / redistribuite it under the terms of this license. You can 
learn more here [2] (absolutely you need to read the license itself, this is 
only for learning purpose).

Just make sure, when you release, you don't break the license of 3rd party 
code (or doesn't include these at all).

For the Copyright line, my point of view is:

- Try to "copyright" only your code
- If it isn't possible (hard modify) add your copyright below
- If you think you'll submit your patch, read the Contributor Agreement, and 
follow guidelines.

[1] http://qt.gitorious.org/qt-creator/qt-creator/blobs/master/LICENSE.LGPL
[2] http://en.wikipedia.org/wiki/GNU_Lesser_General_Public_License

hth
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