kicad-developers team mailing list archive

[Simon Wells <swel024@xxxxxxxxx>]

please see https://lists.launchpad.net/kicad-developers/msg31544.html <https://lists.launchpad.net/kicad-developers/msg31544.html>

There are different minimum versions required of OCCT and nick also had issues with occt working iirc

i think i would still prefer being able to set whether to allow occ in place of oce as was my initial thoughts but i have not worked on this due to the issues experienced by nick


btw as oce is just a fork of occt would that not have the same issues?

> On 30/01/2018, at 9:04 AM, 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 <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>>
>>    [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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