kicad-developers team mailing list archive

[José Ignacio <jose.cyborg@xxxxxxxxx>]

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>
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>>:
> >
> >     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>
> >     [2]:
> >     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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