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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13
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2answers
932 views

Is Stack Exchange's CC-BY-SA v3.0 content compatible with the GPL?

Currently, all user submitted content is licensed under "cc by-sa 3.0 with attribution required". This shows up at the bottom of each page: user contributions licensed under cc by-sa 3.0 with ...
13
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3answers
590 views

Does using GNU Unifont in a game make the game GPL?

GNU Unifont is a fontface licensed under the GNU GPLv2 or later with this exception: The license for the compiled fonts is covered by the above GPL terms with the GNU font embedding exception, as ...
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2answers
323 views

Why does the FSF make this recommendation about ranges of copyright years?

In the document “How to use GNU licenses for your own software”, the FSF says: For software with several releases over multiple years, it's okay to use a range (“2008-2010”) instead of listing ...
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2answers
2k views

Removing the original copyright line from footer

There's this web app licensed under GPLv3 that I'd like to deploy. However, the footer of each page has a copyright line, e.g., "© 2015 FooBar Inc.". Is it okay to remove that line and/or replace it ...
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2answers
2k views

Asking for a more permissive license

I'd like to use and improve an old library for a new project. It is a specialized library and it has not been updated for 5 years. My project is licensed with a permissive license, while the library ...
12
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4answers
5k views

Are CDDL and GPL really incompatible?

Wikipedia seems to suggest that CDDL and GPL are incompatible, yet no one knows for sure why or how. Why and how are the CDDL and GPL are incompatible?
12
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2answers
2k views

So the GPL doesn't restrict the creator of the software in any way?

In another thread I started (Redhat buys Ansible), I am trying to figure out the economic value of a company transaction with respect to GPL'ed software. A few of the answers suggest that the owners ...
12
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3answers
1k views

Am I in danger if a project component is relicensed?

I am currently managing a project, which includes a library that is licensed under the MIT license. My current project is licensed under the Apache 2.0 license. The maintainers of the library that I ...
12
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3answers
2k views

Why do some GNU distributions with a Linux kernel convey GPL software online without providing source code?

I have noticed that some groups or organizations convey the GPL software without the source code. Such examples are: https://sourceforge.net/projects/serbian2014/files/Download/ as Serbian GNU/Linux ...
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2answers
4k views

Can plugins for closed source software use GPL'd libraries?

I use closed-source scientific software for my work. I also use GPL licensed tools and libraries. It would save me a lot of time to be able to call a GPL library directly from the closed-source ...
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1answer
523 views

Is it possible to release a project under the GPL if it contains MIT-licensed libraries?

Specifically the Symfony PHP framework, which is MIT licensed. I've read that the two are compatible, but I want to make sure that a system I develop can be released complete under the GPL.
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2answers
784 views

How to accept contributions for AGPL / proprietary dual-licensed projects?

Supposed I have written a software that I offer using a dual-license model, using AGPLv3 as OSS license, and a proprietary one as commercial (closed) license. Now, let's assume somebody wants to ...
12
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1answer
664 views

Are there any GPL like licenses for Apple App Store?

GPL software is not allowed onto the Apple App Store. The FSF shows how the GPL2 is not compatible with the App Store terms of service. Along the same lines, we'll be talking about GPLv2 ...
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4answers
3k views

Calling GPL'd programs from a shell script

I have a program written in a shell language that consists of several shell script files. Some of these files execute external commands that have been licensed under GPL. Do I have to release my ...
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2answers
175 views

Relicensing WTFPL code under GPL

From brief and rather humorous text of WTFPL license it seems like I can just take the code, slap GPLv3+ sticker on top of it and live happily ever after. Is this really so? Am I missing something? ...
11
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1answer
192 views

GPL version not specified, and actual license text not provided with the source

I'm working on porting a very old program (1994) that was released under the GPL. However, the only reference to that license is this text in the header of the C files: This program is free ...
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3answers
4k views

When is my project a derivative work in an interpreted language?

With compiled languages, I understand when a work is considered derivative of another and thus, a license such as the GNU GPL covers the whole work. However, with interpreted languages such as PHP or ...
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1answer
498 views

Projects which require copyright assignment from contributors?

I read the following in ØMQ - The Guide (in Chapter 6, in the section Licensing and Ownership): All patches are owned by their authors. There SHALL NOT be any copyright assignment process. ...
11
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2answers
602 views

Can I use GPL v3 for source code and CC BY-SA v3 for comments?

I have some source code for which I am the copyright holder. I want to release it under the GPL, but when it was closed source, I copied a bunch of a stuff from Wikipedia for a couple of classes and ...
11
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2answers
3k views

What are the implications of licensing a JavaScript library under GPL?

When searching for "gpl javascript" in Google, I currently find these five first results: A piece by RMS warning about how we are using more and more web apps and that we should care whether these ...
11
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1answer
282 views

Can software licenced in Eclipse Public Licence be used in a project with GPL?

JUnit is licenced under Eclipse Public Licence which, according to Wikipedia, is incompatible with GPL. So does this mean if you’re working on a project licenced with GPL you can’t use JUnit? It's too ...
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2answers
2k views

Can I license Python project under 3-clause BSD while it has GPL-based dependencies

I'm working on an open source Python project and we have plans to use GPLv2-licensed library python3-xlib, but we will not distribute it with our library. So user can install it by pip install our-lib ...
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4answers
813 views

Red Hat acquires Ansible - why?

In October 2015, Red Hat acquired Ansible, the developer of the famous configuration management software Ansible, apparently for a price of about $100M. Ansible, the software, AFAIK is licensed fully ...
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2answers
948 views

Can I omit the preamble of the GPL?

The GNU GPL is very long. If I have to include a copy of it with my program, can I drop the preamble to save space?
10
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2answers
338 views

Does “the GPL doesn't cover the ouput of a program” also apply if the output is source code?

As it is well known (see for example this question or this one), the GPL licenses do not cover the output of a GPL-licensed program. So, I could for example generate some pictures with a GPL-licensed ...
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2answers
756 views

Can I post code examples with GPL software on Stack Overflow?

Suppose there is a Python library called g which is licensed under GPL v2.0 (or v3.0). Suppose further that the library is sufficiently complex that it contains some C/C++ component(s) that are ...
10
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3answers
223 views

What happens if I stop using a GPL library?

If I understand it correctly, when I develop a program that depends on a GPL library, it becomes a derivative work of the library and the GPL license also aplies to it. But what happens if I develop a ...
10
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1answer
2k views

Is it possible to restrict GNU GPLv3 to non-commercial use only?

I've noticed that the jQuery plugin "Fancybox" has a peculiar licensing note in its header: // Licensed GPLv3 for open source use // or fancyBox Commercial License for commercial use // // http://...
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2answers
1k views

Does the GNU GPL 3 prohibit DRM?

Is DRM, which some spell as "Digital Rights Management", others as "Digital Restriction Management", allowed by the GPL? In other words, can software that implements DRM be licensed under the GPL? ...
10
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2answers
712 views

GPL licenced code for a module of a closed source program

I want to create a dynamically loadable module (.dll or .so) for a closed source program, but I would like to make the source code of this module available, and I'd like it to be (A)GPL licensed, so ...
10
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1answer
409 views

If a part of the client-side code is licensed under GPL, does the server-side code have to be under GPL as well?

Say a part of the JavaScript which is provided to the client's browser is under GPL. Does this mean that server-side code also has to be made public under GPL as well? The GPL states: "You must ...
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2answers
1k views

How does GPL apply to neural network models?

Suppose you are working on a mobile application. Because the application contains GPL licensed code, the mobile application will be licensed under GPL too. The mobile application also uses a ...
10
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1answer
603 views

Am I forced to release my project under GPL, even though no GPL source is included?

Recently I ran into a GPL license related problem and I heard many people claiming many different things. I made this post to get this cleared up for myself. Situation There is a program which is ...
10
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1answer
226 views

What are the requirements of the crayon license for the Penn Tree Bank Tokenizer

The Penn Treebank tokenizer is fairly widely used. It is a solid tokenizer, that is based only on regex. For example, it is a word tokenizer in NLTK. NLTK does not make mention of it in their LICENSE....
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3answers
202 views

Using copyleft licenses for non-programming purposes

Well, what I love about GPL is that any derivative work using GPL-licensed work also needs to be GPL licensed, which guarantees that derivative work is open-source, i.e. when requested the source of ...
9
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2answers
763 views

Does a reseller of a GPL Licenced Software have to provide source?

I released a project under GPLv2 license on GitHub. But this project is not distributed as binary by itself. It is only available in a packaged offer along other components. As original licence owner ...
9
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1answer
1k views

What are the details of this accusation regarding the “web app loophole”?

I was recently reading an article, and I came across the following text (emphasis mine): Even that most notorious of “Communist” licenses often cited by paranoid executives as examples of anti-...
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3answers
934 views

If a project is released under GPLv3+ and GPLv4 is less restrictive what happens?

I've seen in multiple places project owners choosing to stick with GPLv2 to prevent the FSF from releasing a license that the project owners don't agree with but I've never seen reasoning beyond the ...
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2answers
4k views

Must author's name be included in GNU GPL v3?

I noticed the GNU GPL v3 license created by Github is very different than the one created by Netbeans. One of the differences is the first line in Netbean's is Copyright (C) 2016 hotwisp Must the GPL ...
9
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1answer
527 views

Is it legal to charge for distributing the source of a software which uses GPLv2 components?

A device I own uses BusyBox. BusyBox is licensed under GPLv2, hence, the software in my device must have a GPLv2 license. Now, the company says they make the source code available, but for a charge, ...
9
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2answers
1k views

Can I dynamically call a LGPL/GPL software in my closed-source application?

This question was originally posted by marcgg on Stack Overflow (second link might be visible to 10k+ only), but was removed there due to being off-topic. It has been preserved here in light of this ...
9
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2answers
436 views

Relicensing from GPL v2 to LGPL v2 - What if I can't contact all contributors?

I am a contributor to a very old project presently in violation of the GPL. Our project is a plugin for a closed-source program, but the GPL does not permit this kind of linking. The project should ...
9
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1answer
816 views

What is the purpose of “or (at your option) any later version”? What if I don't want this?

Firstly, what is the exact purpose of the phrase "or (at your option) any later version" that usually accompanies GPL-licensed software? I get that it's supposed to be to allow future freedoms to be ...
9
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1answer
4k views

Is it legal to Bundle OpenJDK + HotSpot with a closed source application?

As per my understanding, OpenJDK itself is licensed under GNU General Public License, version 2, with the Classpath Exception which should be no issue for bundling with closed source application. ...
9
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1answer
257 views

Can my closed-source software load GPL v3 data?

The GCIDE is a GPL v3'd English dictionary. If I was to release it bundled with a closed-source application, would loading that data count as "linked source code", and therefore be a violation of the ...
9
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1answer
827 views

How does the GPL's linking restriction apply when using a proprietary library with GPL'd interpreted code?

General description: Can I create Python software that will dynamically link against a closed-source library that has a C API (the Python interpreter is not copyleft) and will also utilize a GPL ...
9
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1answer
181 views

Removing Ads from Open Source projects

My most recent encounter with WebYog's SqlYog revealed that the vendor has made their Community edition open source, and available on GitHub, however the product still has obtrusive ads in it. It is ...
9
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1answer
267 views

GPL interpretation - What is our legal exposure if we include another project's code?

I am a contributor to a very old project presently licensed under the GPL. Our project is a plugin for a closed-source program, but the GPL does not permit this kind of linking. The GPL FAQ states: ...
8
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3answers
463 views

Can I use CodeProject code in a GPL project?

I have an open-source project that I originally wanted to license under MIT, but since I'm using a GPLv3 component that I can't quite get rid of (namely, the .g4 ANTLR grammar file that I'm using to ...
8
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2answers
2k views

Are pictures of GPL software GPL?

GPL must be applied on screenshots of GPL software or not. Can a screen recording of GPL software, such as Linux, be published?

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