Lincense question for commercial app

[Zdenek Wagner]

so 21. 1. 2023 v 7:30 odesílatel Daniel Kuster <daniel.kuster at gmail.com> napsal:
>
> Hi,
>
> yes, "used" in my case means basically calling the compiled executable xelatex (which is according to CTAN licensed under X11 license) inside the app.
>
> An issue that might come up are the used fonts (which also have a separate license I assume). But that's another issue.
>
All fonts from the TL should be free but there may be problem with
fonts installed by getnonfreefonts. I have not studied their licenses
and do not even install them to be sure that I do not break hte
license by mistake.

> Because GPL came up: TexLive itself is not under GPL. Only some packages (based on CTAN search might be, or might be under another license for that matter). Is that correct?
>
> Sincerely,
> Daniel Kuster
>
> On Sat, 21 Jan 2023 at 03:39, Boris Veytsman <borisv at lk.net> wrote:
>>
>> KB> Date: Fri, 20 Jan 2023 15:59:20 -0700
>> KB> From: Karl Berry <karl at freefriends.org>
>>
>>
>> KB> It depends on what "used" means. For example, if the app is merely
>> KB> executing a pdftex binary, then providing the sources that that built
>> KB> that binary is sufficient.
>> KB> https://www.gnu.org/licenses/gpl-faq.html#MereAggregation
>>
>> KB> Zdenek, in your case, wanting to link a GPL'd library, indeed,
>> KB> I agree with your analysis. You are making one executable
>>
>> KB> -> not mere aggregation
>> KB> -> all sources must be made available. --best, karl.
>>
>> Absolutely correct.  That's what I meant by saying "However, if you
>> want to MODIFY the sources or link them as a library, you must be
>> careful and read the individual licenses."  Linking to closed source
>> app is allowed by LGPL, but not GPL.
>>
>> AFAIK, one of the purposes of TL is to enable its use in any setting,
>> including commercial ones - as long as you "just execute it".
>>
>> --
>> Good luck
>>
>> -Boris


Zdeněk Wagner
https://www.zdenek-wagner.eu/