Re: [Plplot-devel] Plplot embedded in pyqt + plimage function

[Alan W. I. <ir...@be...>]

On Fri, 2 Nov 2001, Rafael Laboissiere wrote:

> To the best of my knowledge, the QT library is released under a dual
> license, both GPL and QPL, at the users choice, I remember vaguely that the
> QPL and the LGPL are claimed to be compatible (cannot remember where,
> probably in the mailing list debian-legal).  If it is true, this means
> that any LGPL product can be linked against QPL.  I may be wrong, though.

Thanks, Rafael for that reminder of the dual-license (GPL and QPL) for QT.
It turns out that solves everything without us having to change any of
our licensing for any of our programmes.

After some further research I found the LGPL-QPL compatibility question
asked on Debian legal
http://lists.debian.org/debian-legal/2000/debian-legal-200004/msg00005.html.
I found this via a google search so this is probably the most-linked
reference on this subject.

The two separate answers (that you can find in thread-next) are categorical
that there is no incompatibility between QPL and LGPL so it looks like we
are absolutely fine with regard to using this donated software under the
LGPL.  Maurice and Geoffrey were pretty smart when they picked the LGPL
for PLplot!

(The Debian-legal question also made some wishful prediction about pyqt
license that raised some warning flags with me, but I just checked the most
recent pyqt license, and I believe it is an MIT-X style license.  Anyhow,
the license is extremely short and understandable.  You are completely free
to do virtually anything with that software so our LGPL software links fine
with it as well.)

So I believe the original licensing concern I brought up has been completely
answered.

Alan