Re: [Help-glpk] GLPK GUROBI wrapper

[Matteo Salani]

Robbie, list members,

I did not want to raise this flame discussion about licenses...
I wrote this wrapper form myself and a couple of colleagues and found it 
useful.

To me, it doesn't seem to violate any license.
Anyway, if you think it does, please remove it from the list archives 
and forget about it.

all the best,
Matteo

On 02/24/2011 12:14 AM, Robbie Morrison wrote:
> Hello list, hello Matteo
>
>    
> > ------------------------------------------------------------
> > Subject:      Re: [Help-glpk] GLPK GUROBI wrapper
> > From:         Andrew Makhorin
> > Date:         Wed, 23 Feb 2011 22:58:42 +0300
> > ------------------------------------------------------------
> >
> > On Wed, 2011-02-23 at 20:30 +0100, glpk xypron wrote:
> >      
> > > Hello Matteo,
> > >
> > > running your code would violate the license of GLPK
> > > because Gurobi is not licensed under a license
> > > compatible to the Gnu Public License.
> > >
> > > Please, observe that Andrew chose to publish GLPK
> > > under GPL and not LGPL.
> > >
> > > Best regards
> > >
> > > Xypron
> > >        
> > It depends on how Gurobi (which is highly proprietary
> > software) is used within the wrapper assuming that the
> > wrapper itself is distributed under the GNU GPL or a
> > compatible license. I think that in this case Gurobi
> > can be considered as a plug-in, so the following
> > answers the question:
> > http://www.gnu.org/licenses/gpl-faq.html#GPLAndPlugins
> >      
> I read thru 'wrapper_gurobi.c' carefully:
>
>    http://lists.gnu.org/archive/html/help-glpk/2011-02/txtgH2ubVmjpc.txt
>
> It seems to me that the final paragraph in the GNU
> GPLAndPlugins section applies, which means this
> constitutes a "borderline case".  Moreover Matteo's
> program could probably be re-written in a scripting
> language to enforce any necessary separations.
> Hence my initial thought is that Matteo's code is
> acceptable.
>
> Although not a legal consideration, I don't see
> this single C file, released under the GPLv2, as
> undermining GLPK in any way.  Or am I missing
> something?
>
> If 'wrapper_gurobi.c' is deemed okay, then I will put
> an entry for it in the GLPK wikibook.
>
> Whatever the decision, I would like to record my
> appreciation to Matteo for attempting to contribute
> back to the GLPK ecosystem. Cheers!
>
> Robbie
> ---
> Robbie Morrison
> PhD student -- policy-oriented energy system simulation
> Technical University of Berlin (TU-Berlin), Germany
> University email (redirected) : address@hidden
> Webmail (preferred)           : address@hidden
> [from Webmail client]
>
>
>    


--
*Matteo Salani*
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