[General] TriCitizen new Tox client on Android

[nurupo]

Hi,

See this GPL FAQ entry 
https://www.gnu.org/licenses/gpl-faq.en.html#IfLibraryIsGPL

To quote it:

> Q: If a library is released under the GPL (not the LGPL), does that 
> mean that any software which uses it has to be under the GPL or a 
> GPL-compatible license?
> A: Yes, because the program actually links to the library. As such, the 
> terms of the GPL apply to the entire combination. The software modules 
> that link with the library may be under various GPL compatible 
> licenses, but the work as a whole must be licensed under the GPL. See 
> also: What does it mean to say a license is “compatible with the GPL”?

c-toxcore is a library released under the GPL, GPLv3.0-or-later to be 
precise. TriCitizen is a software that uses the library. Per that FAQ 
entry, the work as a whole, i.e. the TriCitizen binary users download 
from Google Play store, must be licensed under the GPL, i.e. the terms 
of the GPL license apply to it.
As per the GPLv3.0 license section 6, you must provide the users of 
TriCitizen with the source code corresponding to the TriCitizen version 
they are using, along with the installation instructions allowing the 
users to build and install the TriCitizen app using the provided source 
code.

Please look around the GPL FAQ more, it covers a lot of questions and is 
quite helpful in understanding how the GPL license works. It's written 
by the Free Software Foundation, the authors of the GPL license, so it a 
rather authoritative source of information.
For example, you might find the following entries interesting:
https://www.gnu.org/licenses/gpl-faq.en.html#LinkingWithGPL
https://www.gnu.org/licenses/gpl-faq.en.html#GPLInProprietarySystem

Of course, *the* automotive source of the information is the license 
text itself, which you can find at 
https://github.com/TokTok/c-toxcore/blob/master/LICENSE
c-toxcore is licensed under GPLv3.0-or-later.

Feel free to ask any questions you might have, I will try to answer them 
to the best of my ability. Also, note that I'm not a lawyer, so what I'm 
saying doesn't constitute a legal advice. If you want a legal advice, 
it's the best to consult a lawyer familiar software licensing. I'm just 
one of many developers and copyright holders of c-toxcore.

---
Regards,
nurupo