freetype license issue

[Jeroen Demeyer]

It seems that we cannot legally distribute freetype within Sage, since
it is GPLv2-compatible but not GPLv3-compatible:
http://www.freetype.org/license.html

We need GPLv3-compatible because some software is non GPLv2-compatible
(gcc, glpk, iconv, libgap, ppl, readline).

See http://trac.sagemath.org/sage_trac/ticket/12447

[William Stein]

On Fri, May 24, 2013 at 8:27 AM, Jeroen Demeyer <jdem...@cage.ugent.be> wrote:
> It seems that we cannot legally distribute freetype within Sage, since it is
> GPLv2-compatible but not GPLv3-compatible:
> http://www.freetype.org/license.html

> We need GPLv3-compatible ...

The site you link to above says "The FreeType License (FTL) is...
compatible with the GNU Public License (GPL) version 3."

So, what's the problem?

-- William






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--
William Stein
Professor of Mathematics
University of Washington
http://wstein.org

[Jeroen Demeyer]

On 05/24/2013 05:57 PM, William Stein wrote:
> On Fri, May 24, 2013 at 8:27 AM, Jeroen Demeyer <jdem...@cage.ugent.be> wrote:
>> It seems that we cannot legally distribute freetype within Sage, since it is
>> GPLv2-compatible but not GPLv3-compatible:
>> http://www.freetype.org/license.html
>> We need GPLv3-compatible ...
>
> The site you link to above says "The FreeType License (FTL) is...
> compatible with the GNU Public License (GPL) version 3."
>
> So, what's the problem?

Never mind, I somehow only read the second bullet point...

[Julien Puydt]

Le 24/05/2013 22:12, Jeroen Demeyer a �crit :

You also both confused sage-the-distribution with sage-the-software.

If freetype's license were a problem to distribute it with gpl-licensed
code, it wouldn't be in any distribution!

Snark on #sagemath

[william]

Free-type is dual-licensed under its own license and GPLv2+

http://git.savannah.gnu.org/cgit/freetype/freetype2.git/tree/docs/GPLv2.TXT

Sages COPYING.txt seems to indicate that the GPL was the license chosen
already.