@Robert Kern maybe you misunderstood me, I am not trying to find a workaround to include GPL code in scipy, actually I just found it interesting that SciPy is compatible to MIT and MIT to GPL, but not Scipy to GPL. Your answer has clarified it so far... I will keep in touch with the cubature author (Steven Johnson) to see if relicensing is an alternative, and moving on with the wrapper (testing and documentation now). Thank you! Saullo 2013/8/25 <scipy-dev-request@scipy.org>
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Today's Topics:
1. Re: cubature license (Saullo Castro) 2. License compatibility SciPy -> MIT -> GPL (Saullo Castro) 3. Re: License compatibility SciPy -> MIT -> GPL (Matthieu Brucher) 4. Re: License compatibility SciPy -> MIT -> GPL (Robert Kern)
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Message: 1 Date: Sun, 25 Aug 2013 08:40:09 +0200 From: Saullo Castro <saullogiovani@gmail.com> Subject: Re: [SciPy-Dev] cubature license To: Scipy-Dev <scipy-dev@scipy.org> Message-ID: <CAHbwRz7Uy_=5o3Dvk=_ M-3oKCAFuckZBHwBd+D6sKx4bTBP5OA@mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1"
@Warren
from the good disccusion here ( http://matplotlib.org/devel/license.html#license-discussion) it seems that the biggest difference between the GPL and the BSD is that the former requires you to distribute your source code, and the BSD allows you to do whatever you want...
I don't see the problem to include it in SciPy, since the source code is always distributed. Even if third part companies like Enthought are using it, it is more like a module, isn't it? and the core code behind it can still be BSD based.
Anyway, the software has a `clencurt_gen.c` stand-alone program which does not have to be used unless the user whant a `p-adaptive` cubature with more than 8193 points per dimension, this type of cubature applies "p-refinement" (increase of interpolation function order) instead of "h-refinement" (splitting the interval). I don't see a need to include this program in the SciPy cubature. We can implement this restriction in the wrapper.
I will ask Steven Johnson about this, if removing this part could make cubature re-licensable to BSD.
Greetings! Saullo
2013/8/24 <scipy-dev-request@scipy.org>
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Today's Topics:
1. Re: cubature license (Robert Kern) 2. Re: cubature license (Warren Weckesser) 3. Re: cubature license (Warren Weckesser)
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Message: 1 Date: Sat, 24 Aug 2013 16:53:10 +0200 From: Robert Kern <robert.kern@gmail.com> Subject: Re: [SciPy-Dev] cubature license To: SciPy Developers List <scipy-dev@scipy.org> Message-ID: < CAF6FJivScnjqnAZO8OJ0XZpJ48+KsC5rdOmE+5z-EWWJn7iH_g@mail.gmail.com> Content-Type: text/plain; charset="utf-8"
On Sat, Aug 24, 2013 at 4:47 PM, Warren Weckesser < warren.weckesser@gmail.com> wrote:
On 8/24/13, Saullo Castro <saullogiovani@gmail.com> wrote:
@Alex,
you are right, "it uses some GPL code from other projects (Hintlib
and
GSL). "
But is it really impossible to include it in SciPy because of that?
Yes. We do not include GPL-licensed code in SciPy. I haven't looked at the Cubature code, so I don't know the extent to which it uses HIntLib and GSL, but based on the comment on the web page, it is unlikely that Steven Johnson can re-license his code with a license that is compatible with SciPy. The GPL is viral that way (insert the usual "I am not a lawyer" disclaimer here).
It's not quite as viral as that. He can license the code that he himself wrote under whatever license he likes as long as it is compatible with the GPL license of the other libraries that he is combining his code with. If the code that he wrote is separable from HIntLib and GSL by rewriting that functionality, he can distribute his code under the BSD license for inclusion in SciPy.
-- Robert Kern