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[Texmacs-dev] Qt and license problems


From: Joris van der Hoeven
Subject: [Texmacs-dev] Qt and license problems
Date: Wed, 24 Jul 2002 12:57:48 +0200 (MET DST)

Hi,

I have been examining a bit more closely the licensing issues of
the Qt toolkit in order to see whether we could use this toolkit
to port TeXmacs to MS/Windows. I am greatly confused by
their multiple licensing system. Probably the most relavant page is

        http://www.trolltech.com/developer/download/qt-win-noncomm.html

which does not seem to be very good for us. Does someone has any ideas
on how we could solve this issue? If we buy the "professional" Qt
developers pack for Windows, are we able to freely distribute binaries,
or would this violate the GPL? In the case that this violates the GPL,
do we want to use a double licensing system and would that be compatible
with TeXmacs being a GNU project? Should we circumvent the problem,
by making the system extremely modular, so that we can decompose
TeXmacs into a free GPL-ed part and a proprietary part which does
the glue with Qt. We should indeed always have this latter possibility,
since we may produce a separate free binary and a proprietary dll
which may be sold on the same CD. Or should we not use Qt at all...

Please let me know what you think;
after that I will ask Stallman about his opinion.

<Joris>




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