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Message #33571
Re: [PATCH] Allow OpenCASCADE standard edition
We might actually have an out. The exception specifies:
"Open CASCADE exception (version 1.0) to GNU LGPL version 2.1.
The object code (i.e. not a source) form of a "work that uses the
Library" can incorporate material from a header file that is part of the
Library. As a special exception to the GNU Lesser General Public
License version 2.1, you may distribute such object code incorporating
material from header files provided with the Open CASCADE Technology
libraries (including code of CDL generic classes) under terms of your
choice, provided that you give prominent notice in supporting
documentation to this code that it makes use of or is based on
facilities provided by the Open CASCADE Technology software."
So it appears since we are only using oce as a library and we are afaik
not modifying any of the oce or opencascade source files, we should be
able to use it with any license of our choice. Anyone interpreting this
differently than I am?
On 1/29/2018 3:12 PM, José Ignacio wrote:
> I think you might be confusing the GPL with the *L*GPL, they are very
> different licenses in practice
>
> On Mon, Jan 29, 2018 at 2:04 PM, Wayne Stambaugh <stambaughw@xxxxxxxxx
> <mailto:stambaughw@xxxxxxxxx>> wrote:
>
> Hey Seth,
>
> One of us missed something. Here is my interpretation:
>
> The opencascade website license states:
>
> "Open CASCADE Technology version 6.7.0 and later are governed by GNU
> Lesser General Public License (LGPL) version 2.1 with additional
> exception."
>
> It makes no mention of later versions of the LGPL (including the
> exception) so I am interpreting this as v2.1 only. I do not have a copy
> (and I'm not going to sign up to get a copy so please check the
> copyright in the source to see if it matches the website) of the
> opencascade source archive to see if the license in the source
> specifically states "v2.1 or (at your option) any later version" which
> is typically how the GPL and LGPL are used. If it does, than I can
> safely add this patch because I can make the claim that I am using
> opencascade under at later version of the LGPL which is compatible with
> the GPL 3 used by kicad.
>
> According to the folks at the FSF:
>
> "Please note that GPLv2 is, by itself, not compatible with GPLv3.
> However, most software released under GPLv2 allows you to use the terms
> of later versions of the GPL as well. When this is the case, you can use
> the code under GPLv3 to make the desired combination. To learn more
> about compatibility between GNU licenses, please see our FAQ."
>
> I hope this clarifies why I am hesitant to merge this patch and what
> needs to clarified. Isn't licensing fun! ;)
>
> Thanks,
>
> Wayne
>
> On 1/29/2018 2:47 PM, Seth Hillbrand wrote:
> > Hi Wayne-
> >
> > My reading of your links is different. Here's the relevant quote:
> >
> > "GNU Lesser General Public License (LGPL) version 2.1 (#LGPLv2.1) This
> > is the previous version of the LGPL: a free software license, but not a
> > strong copyleft license, because it permits linking with nonfree
> > modules. It is compatible with GPLv2 and GPLv3."
> >
> > Did I miss something?
> >
> > -Seth
> >
> > 2018-01-29 11:18 GMT-08:00 Wayne Stambaugh <stambaughw@xxxxxxxxx <mailto:stambaughw@xxxxxxxxx>
> > <mailto:stambaughw@xxxxxxxxx <mailto:stambaughw@xxxxxxxxx>>>:
> >
> > Seth,
> >
> > There maybe licensing issues involved with this. OpenCascade is
> > licensed using LGPL v2.1 not v2.1[1] or later. LGPL v2.1 is not
> > compatible with GPL 3[2]. If OpenCascade is willing to change
> their
> > license LPGL 2.1 or later or if this is just an oversight on
> their part,
> > than I can include this patch. Please verify the OpenCascade
> license
> > with something that I can verify to ensure we are not
> violating and
> > licensing terms.
> >
> > Cheers,
> >
> > Wayne
> >
> > [1]: https://www.opencascade.com/content/licensing
> <https://www.opencascade.com/content/licensing>
> > <https://www.opencascade.com/content/licensing
> <https://www.opencascade.com/content/licensing>>
> > [2]:
> >
> https://www.gnu.org/licenses/license-list.en.html#GPLCompatibleLicenses
> <https://www.gnu.org/licenses/license-list.en.html#GPLCompatibleLicenses>
> >
> <https://www.gnu.org/licenses/license-list.en.html#GPLCompatibleLicenses
> <https://www.gnu.org/licenses/license-list.en.html#GPLCompatibleLicenses>>
> >
> > On 1/29/2018 1:54 PM, Seth Hillbrand wrote:
> > > Hi All-
> > >
> > > Currently, the build requires the opencascade community
> edition. For
> > > various reasons, I need to have the current non-community
> edition of
> > > OpenCASCADE installed on my work machine.
> > >
> > > The attached patch allows compiling KiCad with either the
> OpenCASCADE
> > > community edition or standard edition.
> > >
> > > I've tested on a homebrew-based Mac install as well as Linux but
> > haven't
> > > verified MSW, if someone would be willing to test it there,
> that would
> > > be great! The basic search routines are lightly modified from
> > FreeCAD's
> > > logic and keep their LGPL copyright on the CMake file.
> > >
> > > -Seth
> > >
> > >
> > >
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