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Re: License questions (Users-prolog Digest, Vol 85, Issue 4)


From: aLurchi
Subject: Re: License questions (Users-prolog Digest, Vol 85, Issue 4)
Date: Thu, 20 Jan 2011 01:52:08 -0800 (PST)


Hello everybody, 

>From what I understood Daniel and Duncan are saying: The resulting native
executables are not limited by the GPL... 

"copyright law does not give you any say in the use of the output people
make from their data using your program. If the user uses your program to
enter or convert his own data, the copyright on the output belongs to him,
not you. More generally, when a program translates its input into some other
form, the copyright status of the output inherits that of the input it was
generated from.

So the only way you have a say in the use of the output is if substantial
parts of the output are copied (more or less) from text in your program. For
instance, part of the output of Bison (see above) would be covered by the
GNU GPL, if we had not made an exception in this specific case." (source:
www.gnu.org)

So I guess the question is pretty much: Do stand-alone executables created
with GNU-Prolog contain GPL-covered parts? 
If not the resulting executables should not be coverd by the GPL and thus be
open for commercial/unfree use. 

Any thoughts on that?

Nils






Daniel Diaz-3 wrote:
> 
> 
> 
> 
>   
> 
> 
> Hello everybody; 
> 
> Daniel (Savard) and Duncan are right: the resulting native executable
> is limited by the GPL license. 
> 
> To simplify user's life, the next stable version of gprolog should be
> fully released under the LGPL license (
> http://www.gnu.org/licenses/lgpl.html ). 
> 
> You can find the current (unstable) snapshot of 1.4.0 at: 
> 
> http://gprolog.univ-paris1.fr/unstable/gprolog-20100713.tgz 
> 
> I plan to release the stable version 1.4.0 in September or October. 
> 
> Daniel 
> 
> Alexander Wolfe a écrit :
> 
>   Thanks for the help guys. It makes more sense to me now.
> 
> -Alex
> 
> On Jul 13, 2010, at 9:28 AM, Duncan Patton a Campbell wrote:
> 
>   
>   
>     On Tue, 13 Jul 2010 12:00:43 -0400
> address@hidden  wrote:
> 
>     
>     
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> Today's Topics:
> 
>   1. License questions (Alexander Wolfe)
>   2. Re: License questions (Daniel Savard)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 12 Jul 2010 11:42:50 -0700
> From: Alexander Wolfe <address@hidden> 
> Subject: License questions
> To: address@hidden 
> Message-ID:
>       <address@hidden> 
> Content-Type: text/plain; charset="iso-8859-1"
> 
> I have a couple of questions about the use of gprolog compiled programs. I
> understand that gprolog is GPL software and that any modified version of
> its
> codebase would be required to be released under a GPL compatible license.
> What about programs compiled with gprolog? I know that gcc does not
> restrict
> compiled programs to the GPL. What is the case here?
> 
> Thank you.
> 
> -Alex
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> ------------------------------
> 
> Message: 2
> Date: Mon, 12 Jul 2010 15:21:54 -0400
> From: Daniel Savard <address@hidden> 
> Subject: Re: License questions
> To: address@hidden 
> Message-ID:
>       <address@hidden> 
> Content-Type: text/plain; charset=ISO-8859-1
> 
> 2010/7/12 Alexander Wolfe <address@hidden> :
>       
>       
>         I have a couple of questions about the use of gprolog compiled
> programs. I
> understand that gprolog is GPL software and that any modified version of
> its
> codebase would be required to be released under a GPL compatible license.
> What about programs compiled with gprolog? I know that gcc does not
> restrict
> compiled programs to the GPL. What is the case here?
> 
>         
>       
>       
> The answer is obvious, same license same terms. A license cannot
> pretend to acquire rights on the original work of others. The idea of
> a license is to protect something and in this case, the GNU-Prolog
> compiler.
> 
> I know there is some copyrights and intellectual property lawyers
> which are dessiminating the idea the GPL license extend to everything
> developped using OSS. But they are wrong. There is plenty of examples
> they are.
> 
> BTW, I am not a lawyer, so, if this is a very sensitive question for
> you, ask one or more than one, but pick a good one.
> 
>       
>     
>     Nor am I, but at the end of the COPYING file in the source install of
> Gprolog
> you will find the following:
> "
> This General Public License does not permit incorporating your program
> into
> proprietary programs.  If your program is a subroutine library, you may
> consider it more useful to permit linking proprietary applications with
> the
> library.  If this is what you want to do, use the GNU Library General 
> Public License instead of this License.
> "
> This is the LGPL loophole, allowing you to LINK your own code to
> the Gprolog Libraries without releasing your code under the GPL.  
> 
> So your development environment is under the main GPL and you 
> could not sell it without the full GPL viral recursion, but
> target/end use products are not so encumbered, given that 
> they are substantially different in function and purpose than
> Gprolog itself.
> 
> Dhu
> 
>     
>     
>       Regards,
> -- 
> -----------------
> Daniel Savard
> 
> 
> 
> ------------------------------
> 
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