Questions tagged [gpl]

The GNU's General Public License, a commonly-used free software license. The GPL has various versions, v1-v3, so use this tag only for questions talking about overarching issues of the licenses or shared characteristics. For example, for a question about a unique section on version 3, use the [gpl-3] tag.

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Is it legal to monetize from someone else's software?

I was wondering if I copy someone else's software and make some design changes and try to make money from it. Is it legal? Which licenses provides a facility for that?
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Does the GPLv3 give recipients the legal right to circumvent technological measures imposed on them by third-party redistributors?

To my understanding, a distributor of GPLv3 software who does not have any right to redistribute software except by becoming a GPLv3 licensee, and knowingly distributes GPLv3 software agrees to ...
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1answer
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Modifications of server software under GPL, with web/CLI interface

Let's say we have a piece of software which is licensed under the GPL. There are no binaries; it's a framework of groups of services and libraries of Python code running on a server. As far as I can ...
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Understanding GPL & LGPL: Free Software with zero-cost, proprietary libraries

Background: This question is derived from a previous question. I am writing a Blender add-on which enables the use of Blender with a piece of hardware (i.e., a lightfield display). Blender and the ...
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1answer
298 views

GPL-3.0 library in MIT project

I'm working on a project comprised of a small HTML page and a JavaScript script. From the HTML page I include a library which is licensed under the GNU General Public License v3.0, and from my script ...
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2answers
207 views

Can a SaaS product by successfully developed as Open Source?

The accepted answer on How can large open source projects be monetized? mentions open source SaaS. Once you are successful enough in one of the above, you can afford giving away your software for ...
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2answers
2k views

GPL, LGPL or MPL for open source app with closed source Pro flavour

I have had a fairly popular Android business app on Google Play a while now. It is available as a free version and a version with features targeted to bigger businesses. I am currently in the process ...
3
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1answer
612 views

Can I use proprietary library in a GPL-Compatible library loaded on a gpl Program?

I am asking mainly to be sure. To describe it better, I want to use some external functionality that is available through a proprietary library. Since the library IS NOT compatible with GPL Programs, ...
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4answers
165 views

Non-public data in GPL project

Is it possible to release software under GPL license but not publish one small part of it which contains data that really shouldn't be available publicly (I mean private API keys, etc.) If not, which ...
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1answer
906 views

Can Public Domain use GPL licensed library/program?

A similar question already asked here (https://softwareengineering.stackexchange.com/questions/159023/can-cc0-code-use-a-gpl-library) but my question is a little bit different, perhaps more accurately....
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1answer
99 views

GNU General Public License version 2 on a game image resource

I am creating a commercial game, with most resources using CC-BY-xx licences for graphics, sound etc. I have found some graphics that i want to add to my game. However, these graphics are licensed as "...
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2answers
315 views

Selling GPL derived source code

I modified a GPL opensource project and distributed the binary free of charge on Google Play. I'm planning to release source code per request via email only. My question is if someone ask for the ...
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1answer
153 views

Automated GPL download and installation in BSD project

I have a dependency on GPL-licensed library in the library I maintain. My library is BSD and must remain as such. Wondering if I can automate the download and installation of the GPL dependency in ...
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2answers
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how did Elastix move from GPL to proprietary?

I'm just scratching the surface for VoIP with Elastix. I notice that Elastix 2.x is "open source" but 5.x is proprietary? Looking into licensing from the manual on Elastix brings: http://www.3cx....
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1answer
116 views

OpenJDK GPLv2+CPE and Spring (Apache 2.0). Can I use them together?

I understood Apache 2.0 is not compatible c GPLv2, but OpenJDK uses GPLv2 with CPE. Apache 2.0 allows linking CPE allow linking. So can I use it together without modification code of OpenJDK: OpenJDK (...
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2answers
115 views

How are software patches licensed?

Consider the software project dwm by Suckless. The project is clearly licensed under the MIT/X Consortium License, which includes the clause The above copyright notice and this permission notice ...
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1answer
40 views

Can I sell my primitive material which is intended to be processed in a factory software under GPL?

If I develop a parametric 3D mesh creation tool and license it under GPL (because it is dependent on some geometry libraries also under GPL), can I sell 3D mesh data for use with the tool and would ...
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3answers
463 views

Pacifist copyleft-like partially-open-source license [closed]

I'd like a license restricting use to non-military projects, but otherwise just like the GNU GPL. (There is obviously no point in making a permissive license like that, because editing a comment is ...
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1answer
109 views

I'm developing a library. Is there a license similar to GPL3 that doesn't force a license change for the project?

If an open source project is licensed under MIT, I want them to be able to use my library without changing their license to GPL3. However I still want developers of proprietary applications to make ...
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1answer
75 views

putting on github the GPL code of a dead person

Jacques Pitrat was one of my intellectual masters, and the pioneer of French AI (his PhD thesis mentioned artificial intelligence in 1966). He was the president of the jury of my PhD defense (1990). ...
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1answer
70 views

Implementing the same idea under GPL and under MIT

What are the limitations and constraints if one wants to implement the same idea in different languages requiring different licenses? To make it more concrete, say some algorithm should be implemented ...
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1answer
98 views

Collective work using a GPL library

Assume I have a python script that runs a GPL library binary through command line (through os.system('GPL call') and then analyze the output (which comes from the terminal). Is that a collaborative ...
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1answer
53 views

Where can I find a final, authoritative, clear list of how to handle “license snippets” for common licenses?

I am looking for an authoritative, clear and up-to-date document on what exactly a person or an institution has to do for the so-called "license snippets"/"license notice" for ...
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3answers
95 views

Understanding GPL: Blender Add-on + System Library

Basic Information I am writing a Blender add-on which enables the use of Blender with a piece of hardware (i.e., a lightfield display). Blender and the use of the specific Python API, which is ...
1
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1answer
982 views

Java OpenJDK 11 and Spring licenses

I'm developing a web application with Spring (and Spring Boot) and Open JDK 11 and I'm very confused about their licenses and how I can combine them. Open JDK 11 is released under GPL GNU 2 (with ...
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1answer
66 views

What is the correct way to add a CC BY-SA 4.0 license to the assets in a project already licensed under GPLv3?

These assets would include images, sounds, and anything else in the project besides the source code. I own the copyright to these assets. To be clear, I'm asking how I would actually apply the ...
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2answers
142 views

Can I use dual license for a python package which uses library with GPL license?

I have created a python package with several files and directories out of which only one particular module requires a library (PyQt) with GPL license. Since GPL license of the used library puts a ...
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1answer
466 views

Is it permissible to install Cygwin (GNU GPL) and its packages from within an installer for a proprietary and commercially sold application?

Is it legal to package the Cygwin installer executable — and some of its corresponding packages — and run it from another installer that installs a proprietary and commercially sold application? ...
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2answers
235 views

Is GPL linking to AGPL possible?

Suppose I have a program that uses a library released under the AGPL license. Can the program be released as GPL, or does it have to be released as AGPL too ?
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0answers
45 views

Does rewriting a library in another language allow escaping GPL? [duplicate]

Given a library A, which is written in C and licensed under GPLv2, and lib B, which is written in Rust and compatible with the API/specs of lib A but the devs have read through the code of lib A, can ...
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1answer
283 views

Is open source license compatible with a patent-encumbered standard?

Let's say heic is a patented image format. There is an open source implementation of heic called "libheif". GIMP use it to edit heic images, however, development team of Eye of Gnome(EOG) refuse to ...
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1answer
74 views

Can different parts of a project be under different licenses?

I have a personal project (in C++) I've been working on that I'm thinking of putting on Git hub. I'm finding the question of picking an appropriate license quite daunting. Part of the project is an ...
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1answer
49 views

Does GPL apply to proprietary software that is linked in through a compatibility layer

For example, suppose a compatibility layer is developled that can use Windows driver binary directly in Linux kernel (feasibility of such a layer is another story which is also discussed bellow), then ...
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1answer
100 views

When must a project that uses GPL licensed projects use a GPL license?

i have a project that needs to use tools licensed under the GNU/GPL license. my question is: must a project that a uses GPL licensed tool like netdiscover be licensed as a GPL project? if my ...
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0answers
515 views

Can I use GPL-licensed software in a commercial program?

Can I use GPL-licensed software in a commercial program? I know that the use of source code in a commercial program is forbidden but if I use system call functions for example I make the call a bash ...
0
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1answer
72 views

WordPress: only built plugin GPL licensed

We are developing WordPress plugins. As WordPress itself is GPL licensed we must publish our plugin as GPL, too. Our complete plugin development environment is built on top of a lot of devDependencies ...
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1answer
24 views

(L)GPL software on devices provided for internal use

As far as I understand, there can be issues with (L)GPL-licensed software in code-signing contexts where modified code is not allowed to run. Now, suppose an organization (for example, a company or a ...
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1answer
89 views

Open Source (A)GPL(2|3) but limit resources or business for others without a paid license [duplicate]

I want to release come kind of computation engine as an open source project. For the whole source and usage, I am fine with the content of the GPL but what I want to make sure: There should be a ...
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2answers
1k views

Restrict GPLv3 to non-commercial use [duplicate]

My question is very similar, but crucially different from this one. I have a library that I want to offer under a dual license: GPLv3 and commercial. GPL so others can read, maintain and modify if ...
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1answer
88 views

GPL and “shadow Linux”

This is a follow up of my existing question Does GPL apply to proprietary software that is linked in through a compatibility layer, but has a new major focus (i.e. the shadow Linux). Suppose a Linux-...
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1answer
126 views

Need sellable license-text for “commercial use” of GPL v3 software [closed]

I'm the creator of a software which is licensed under GPL v3. But now I want to sell the software for "commercial use" like Fancybox (http://fancyapps.com/fancybox/3/#license). I'm a real noob in ...

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