Another small license issue (Re: Question)

[Egon Willighagen]

On Thursday 13 September 2001 17:53, Francis J. Lacoste wrote:
> On Thu, Sep 13, 2001 at 01:46:21PM +0300, Plamen Bozukov wrote:
> > Hello all,
> >
> > I got the following question:
> > What do you think about QPL license ?
> > Is it right for lire ?

We will choose the GPL license for the Qt libraries for our Unix

> In what sense ? If you mean linking GPL code with QPL, I think it
> isn't compatible. But I think that Qt (the major code under the QPL)
> is dual licence now : GPL or QPL.

This is true for Unix/X, but not for windows... If we want to start porting
Lire to windows next year, we need to be sure that our GUI efforts now can
be ported too. Ofcourse, for Unix/X we choose the GPL license for the Qt
libraries.

For the windows port of Qt things are slightly different. Just the QPL license
applies, which is is not GPL compatible, but:

(see 
http://www.trolltech.com/products/download/freelicense/noncommercial-dl.html)

"If you wish to port one of the many GPL'd Qt-based Unix applications to 
another operating system using the Qt non-commercial edition, you need to get 
that application's copyright holders to add an exception to its license. 
Similarly, if you develop a new application with the Qt non-commercial 
edition and wish to license it under the GPL you may wish to add such an 
exception to your license. The Free Software Foundation has provided the 
following wording for such exceptions:

As a special exception, <name of copyright holder> gives permission to link 
this program with Qt non-commercial edition, and distribute the resulting 
executable, without including the source code for the Qt non-commercial 
edition in the source distribution."

An additional node about portability:
"By using Qt, you develop and maintain a single source code base that runs 
with native performance on all major desktop operating systems, including but 
not limited to Microsoft Windows 95/98/2000, Microsoft Windows NT, MacOS X, 
Linux, Solaris, HP-UX, Tru64 (Digital UNIX), Irix, FreeBSD, BSD/OS, SCO and 
AIX."
Qt seems quite portable.

Egon

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