Dear Francesco,

thanks for your clarifications. We will opt for reimplementing our code using 
GnuTLS.

Best regards,
Carles



> El 14/9/2015, a las 23:24, Francesco Poli <invernom...@paranoici.org> 
> escribió:
> 
> On Mon, 14 Sep 2015 20:20:21 +0200 Carles Fernandez wrote:
> 
>> Dear all,
> 
> Hello Carles,
> 
>> 
>> recently, I uploaded a package for gnss-sdr 
>> (http://mentors.debian.net/package/gnss-sdr 
>> <http://mentors.debian.net/package/gnss-sdr>).
> 
> Thanks for contributing to Debian!
> 
>> The package was rejected due to a conflict between GPL v3 and the OpenSSL 
>> license. From what I've got to know, the upstream license must include an 
>> exception to the GPL allowing linkage against OpenSSL.
>> 
>> I’m also an upstream developer of such software, so I want to implement the 
>> required changes for package acceptance. These are the devised steps:
> [...]
>> We would like to ask if we are on the right path, and if there are any other 
>> requirements regarding this issue that we need to address from the upstream 
>> side.
> 
> The steps seem fine to me, but I am afraid they are not enough.
> Any other library linked with gnss-sdr has to be compatible with
> OpenSSL.
> Hence, if gnss-sdr links with other GPL-licensed libraries lacking the
> OpenSSL exception, you will have to persuade their copyright holders to
> also add the OpenSSL exception.
> 
> If I understand correctly, there are at least libuhd and libgnuradio,
> which are linked with gnss-sdr, are GPL-licensed without any OpenSSL
> exception. I guess the FSF is unlikely to be persuaded to add an OpenSSL
> linking exception...
> 
> 
> An alternative approach may be: drop OpenSSL entirely, and link with
> some GPL-compatible TLS/SSL implementation instead (such as libgnutls or
> libnss or anything else fit for the purpose).
> 
> 
> A third alternative strategy is: be patient, and wait for OpenSSL to
> switch to a saner license. It seems that some progress on this front has
> been (unexpectedly) made on August the 1st, 2015:
> https://www.openssl.org/blog/blog/2015/08/01/cla/
> The announced plan is to switch to the Apache License version 2.0,
> which is GPLv3-compatible (although still GPLv2-incompatible...).
> I am not aware of any more recent news on this, though.
> BTW, I am not happy about the CLA part and I would be much happier, if
> they decided to switch to a simpler and more all-compatible license
> (such as the 3-clause BSD license, or the Expat license, or the zlib
> license), but that's another story...
> 
> 
> I hope this helps a little bit.
> Please take into account that what I wrote is my own personal take on
> the matter: I do *not* speak on behalf of the Debian Project.
> And it's *not* legal advice (I am *not* a lawyer).
> 
> Bye.
> 
> --
> http://www.inventati.org/frx/
> There's not a second to spare! To the laboratory!
> ..................................................... Francesco Poli .
> GnuPG key fpr == CA01 1147 9CD2 EFDF FB82  3925 3E1C 27E1 1F69 BFFE

--
------------------------------------------------------------
Dr. Carles Fernández Prades
Head of the Communication Systems Division
Senior Researcher

Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
Address: Parc Mediterrani de la Tecnologia
      Av. Carl Friedrich Gauss, 7
      08860 Castelldefels, Barcelona, Spain.
Phone: +34 936452909    Fax: +34 936452901
http://www.cttc.es/people/cfernandez/ <http://www.cttc.cat/>
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