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Questions tagged [license-compatibility]

License compatibility is the comparison of two or more licenses to determine if certain usages and actions can be made. Use this tag if the question would like to determine the compatibility of licenses, or their individual clauses.

17
votes
1answer
1k views

GPL V3 with OpenSSL Exception

I've decided to license some code I have yet to release under the GPL v3. However, OpenSSL is used quite a bit in the software and I know that the two licenses are explicitly cited as being ...
6
votes
2answers
1k views

Can I use a proprietary library in my GPL'd program?

The case of proprietary programs linking to GPL'd libraries has been discussed thoroughly. However the inverse case - a GPL'd program is linking to a proprietary library - is rarely mentioned. ...
12
votes
2answers
458 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 ...
3
votes
1answer
59 views

How would it be possible to distribute a GPL program with an Apache program?

A friend and I are making a program licensed under the Apache 2.0 license, and we would like to pull in code from one of his old projects licensed under the GPL 3.0 license, but I don't see a way to. ...
7
votes
2answers
283 views

Using GPL-ed library from code with more permissive license (MPL-2)

I'm writing a library and a tool on top of it, and I would like to release both under MPL-2. However, the library has an optional dependency, another library which is released under GPL (not LGPL). I ...
6
votes
2answers
175 views

Can I change the license of a GPL derived work to be more restrictive regarding version upgrades?

Specifically, the GPLv2. The creator of a work can allow people to upgrade to a higher GPL version: (emphasis mine) This program is free software; you can redistribute it and/or modify it under ...
4
votes
1answer
229 views

What license should I release my code under? It contains FFmpeg binaries, code from NAudio and code from FFmpeg.Autogen

I want to release my WPF Media Element based on FFmpeg on GitHub. I want to be as permissive as possible. I believe that this control could be of great help to a ton of people. Here are the links to ...
5
votes
1answer
88 views

Do I need to protect myself against liability (loss of data)

I've written my first app, to process images (user photos) on the phone. It writes to the jpegs on the phone, and maybe I'll add functionality to delete selected images. Do I need to protect myself ...
9
votes
2answers
1k 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 ...
3
votes
1answer
84 views

Is a ROM image an “executable file” for GPL purposes?

I am planning to include a program covered by the GNU General Public License and a GPL-incompatible program in a collective work designed for a machine that executes programs from a cartridge ...
4
votes
1answer
347 views

Software license with external libraries

Scenario I plan to share the source code of a larger software that depends on external libraries. The directory structure of the project is as follows src/ ... my source code ext/ ... ...
1
vote
0answers
44 views

How to license a mashup? [duplicate]

I have designed a mashup that uses open source software. A substantial part of another open source project was used and the software of that project was made available under the MIT license. There is ...
2
votes
1answer
187 views

Are CDDL and MPL compatible with each other?

Sun's CDDL is based on Mozilla's MPL, and is expectedly incompatible with GPL. What about the MPL itself? Is the CDDL compatible with the MPL?
8
votes
4answers
3k 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?
2
votes
2answers
107 views

Can a CDDL project import a BSD file without re-/double- licensing?

I'm a bit confused on how CDDL interfaces with other licences. If I want to modify an existing CDDL project, by introducing an extension — implementing a certain feature in a new file — ...
10
votes
2answers
366 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 ...
4
votes
6answers
613 views

Why don't BSD developers use the SSLeay addendum if they hate GPL?

It's not uncommon to see BSD developers upset that someone takes their project, does a few modifications, and then releases the resulting work under GPL, such that the resulting improvements can no ...
11
votes
1answer
414 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.
11
votes
2answers
244 views

What counts as adaptation for using code licensed under CC BY-SA 4.0 in software licensed under GPLv3?

Since 2015-10-08, GPLv3 is listed as one-way compatible license for CC BY-SA 4.0: […] you may license your contributions to adaptations of BY-SA 4.0 materials under GPLv3, but you may not license ...
8
votes
3answers
348 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 ...
9
votes
3answers
492 views

What is the copyright status of Colossal Cave Adventure?

What is the copyright status of the source code of “Adventure” (also known as Colossal Cave Adventure)? There is a good record today of the history of Adventure. Specifically: The 1975–1976 Crowther ...
12
votes
1answer
1k views

How to licence a project which includes MIT, BSD, Modified BSD, and New BSD libraries

I've been working on a project for a while, and I'm almost ready to release it, but I've been more concerned with getting it to build than legal considerations, and now I'm not at all sure where I ...
3
votes
0answers
41 views

Difference between creative commons and GPL? [duplicate]

Why shouldn't I release code under a Creative Commons License? For me the CC-BY-SA sounds very nice and is quite more readable than a whole GPL license, so I would like to know why its such a bad ...
14
votes
2answers
3k views

Why is GPLv2 incompatible with GPLv3?

As I understood in this wonderful answer, GPLv3 and GPLv2 code can't be used simultanously in the same product. Why?
6
votes
1answer
347 views

CDDL1 and GPL2 + classpath exception incompatible with GPL3?

I am about to decide on the license I can attribute to my free-libre open source software (FLOSS). I have used the Stanford Core NLP released as GPL3+. I have also used the JAXB API which, although ...
16
votes
1answer
355 views

Can I release under AGPL a program that uses a GPL library?

I just wrote a program that embeds and uses a GNU-GPL library (GPLv3 or at your discretion any later version). Can I release my program under the GNU AGPL v3 license?
7
votes
1answer
460 views

Adding feature to an Apache v2 package

I'm working on one npm package based on another one but with another approach, this package is licenced under Apache v2 and I want to use MIT. After some use of my package I've noticed I need to use ...
14
votes
2answers
2k views

Combining code written under different licenses (Eiffel Forum License, MIT and Apache), what are my options?

So I'm new to all this licensing jazz, and I've just started work on a project I'd like to one day publish as open source. I've found a couple of projects so far that have code to accomplish stuff ...
16
votes
3answers
6k views

If I'm using a GPL 3 library in my project, can I license my project under MIT license?

If I'm using a library that is licensed under GPL v3 in my project, can I license my project under the MIT license? I tried to read the GPL v3 text but I cannot understand it without your assistance.
7
votes
3answers
2k views

is CC BY license GPL compatible? CC BY vs CC0

CC0 license is GPL compatible. A component with such license can be included in GPL-licensed product. Is this true also for CC BY license? What is the difference between CC0 and CC BY licenses? ...
5
votes
3answers
183 views

Does a CC BY-SA 4.0 specification lose any AGPL3+ benefits?

If I release a program specification [1] under the AGPL, and the program itself under the AGPL, the two are obviously compatible: I can develop them at the same time, copy text (for example, method ...
13
votes
4answers
571 views

Are licenses affected if the author adds conflicting clauses alongside?

I see this one quite a lot: an author releases something under a standard free/open license (i.e. not a crayon license), but on the same release page adds a clause that conflicts with the license. I.e....
21
votes
3answers
998 views

Copyfree Open Innovation License compatibility

I'm interested in the Copyfree Open Innovation License as a simpler alternative to Apache 2.0 (it is a permissive license with an explicit patent grant). But because it's not so popular, not much ...
13
votes
2answers
3k views

Can I link a Apache 2.0 library into software under GPLv2?

The Apache 2.0 License has a built-in linking exception: For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to ...
13
votes
1answer
493 views

Is there a reason to prefer the SimPL over the GPL? Does it carry the same legal weight?

I just came across the SimPL License which is described as: This Simple Public License 2.0 (SimPL-2.0 for short) is a plain language implementation of GPL 2.0. The words are different, but the ...
4
votes
1answer
74 views

Integrating code without a patent license into a code base with a patent license

What issues are involved when taking code from (for example) MIT licensed code and including it in a Apache 2.0/GPLv3 licensed project. Does that mean that there is simply no patent license granted? ...
16
votes
4answers
256 views

Does a host application's license apply to plug-ins written for it?

This was prompted by another question which reminded of a past experience. Consider the following: An open-source project supports a plug-in architecture The project is released under a copyleft ...
14
votes
3answers
1k views

How does one combine differently licensed code in one open source program?

I'm the author of WorldPainter. It's licensed according to the GPL v3, but I am about to include some code (dynmap) that is licensed according to the Apache License version 2.0. According to both ...
8
votes
2answers
165 views

When does a forked project require a license?

I haven't quite grasped the implications of forking a licensed project to public. I am assuming that a similar license should be kept, but what happens if that's not possible? Edit I am providing ...
4
votes
1answer
167 views

GFDL and CC BY-SA compatibility and Use

For Free/Opensource documentation, There are two license widely used. GNU Free Documentation License Creative Commons BY-Share Alike Both say re-distribution must be under same license as GFDL is ...
9
votes
2answers
130 views

How to deal with unofficial/proprietary licences - are open source projects of this type really open?

Recently I was confronted with several projects that claim to be open source. I was happy to find their source code on a public repository but when looking at the license I was wondering why they do ...
5
votes
1answer
229 views

Can I make a derived work of a GPL project and a non GPL project for personal use?

In the GNU General Public License, version 2, some limits on how you can modify the Program are listed. Point 2.b states that (emphasis mine): You must cause any work that you distribute or publish,...
8
votes
1answer
97 views

Why is the CC sampling+ license incompatible with other CC licenses?

Creative Commons used to publish a license called "Sampling Plus", but according to this page, it was retired/deprecated in 2011 due to inadequate demand and "Not compatible with any other CC license"....
7
votes
2answers
87 views

What prevents the community converging on a small set of licenses?

By a quick count, wikipedia lists almost fifty different open source / free software licenses. Assuming (and this may not be valid) that many of these licenses were created in the early days of the ...
19
votes
1answer
3k views

What are the differences between GPL V2 and V3 licenses?

One of the most widely used and most popular free and open source software licences is the General Public License. I want to know in simple terms: what are the differences between GPL Version 2 and ...
7
votes
1answer
46 views

In a Wikipedia article am I able to insert information licensed with CC BY even though they use a CC BY-SA license?

Background: While writing an article on Wikipedia I needed to include text that is licensed under a CC-BY license. After a bit of digging I found that Wikipedia uses a CC BY-SA license. Question: ...
12
votes
2answers
98 views

Can I have one license cover part of a software and another covering the other half?

Scenario: Lets say I have a software I have been developing. I am about to release it but I first have to apply some licenses. Question: Suppose I want to release part of the software (the code) ...
8
votes
1answer
116 views

Dual license compatibility

Suppose I place work I publish under two licenses. If the two have conflicting attributes which property should be used. Can you specify which properties you want two be applied from the two licenses?...
14
votes
2answers
913 views

Are permissive licenses (MIT/BSD/zlib) compatible with CC-BY?

Permissive licenses like MIT only require that you include the license text if you redistribute. CC licenses that have the BY part require that the original authors are attributed, but in flexible ...
33
votes
6answers
1k views

Can I copy-paste a snippet from Stack Overflow into my GNU-GPL project?

I have found on Stack Overflow a 10-lines block of code that does exactly what I want. There is no license information in the post nor on the answerer's profile page, so the CC BY-SA 3.0 license of ...