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.

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19 votes
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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 ...
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28 votes
3 answers
17k 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.
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43 votes
5 answers
8k views

Can there be a copyright on negative code?

This is a hypothetical question, but I am curious. Feel free to ignore it, when it seems too theoretical for you. Some people may know the situation that you implement a feature and in the end you ...
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62 votes
3 answers
5k views

How can I determine if two open source licenses are compatible with each other?

Given two open source projects, each with different licenses, are there metrics or resources I can use to determine if it is legitimate to copy code from one of the projects to the other?
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17 votes
4 answers
544 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 ...
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12 votes
4 answers
6k views

Linking from LGPL 2.1 software to Apache 2.0 library

The FSF claims that GPL v2 is incompatible with Apache 2.0 and that linking to a library generally creates a derivative work of this library. However, the linking exception of the LGPL allows ...
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35 votes
6 answers
3k 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 ...
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14 votes
2 answers
3k 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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17 votes
1 answer
3k 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 ...
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11 votes
2 answers
560 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 ...
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5 votes
1 answer
338 views

GPL Application <-> LGPL Plugin <-> Properietary code

I would like to explicitly consider possibility of having either of Fig.1: (1-A) A GPL application with dlopen-based plugin system. (1-B) LGPL plugin for application (1-A), that is linked to (1-C) (...
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9 votes
1 answer
2k 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 ...
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5 votes
1 answer
224 views

Must CC BY-SA be included for ideas and code taken from Stack Overflow?

I'm still unclear about licensing. If I have a project on Github that's licensed under GPL and found pseudocode on a Stack Overflow question, must I now dual license my code on Github and GPL as ...
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2 votes
3 answers
277 views

Proprietary resources in GPLv3 project

Can a GPL project use proprietary resources (icons) as part of it? What I mean is that if it is possible that there is a repository covered by a GPL license that has a build script that downloads ...
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28 votes
4 answers
8k views

Can I use my own GPL'ed code in my closed source program?

Let's say that program A was made by me, with me being the sole copyright holder. If I license this program under the GPL-3.0, can I use that program in program B that is closed source?
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26 votes
9 answers
8k views

Can I modify an open source license to require that I be notified?

I often use the MIT license for my projects. But recently I've had the thought that I really would like to be notified if someone forked my software, whether it's for personal use, released or not I ...
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22 votes
3 answers
7k 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 ...
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17 votes
2 answers
7k views

How is the BSD GPL-compatible?

The BSD license says that derivative works may be distributed under the following conditions: Redistribution and use in source and binary forms, with or without modification, are permitted ...
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  • 171
12 votes
2 answers
859 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 ...
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8 votes
1 answer
267 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?...
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24 votes
3 answers
2k 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 ...
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13 votes
1 answer
3k 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 ...
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9 votes
2 answers
3k 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. ...
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3 votes
1 answer
140 views

Meaning of "and" and "additionally" connectors with two Open Source licenses

[This question is an expansion of the question "Meaning of OFL and GPL" because of limits on the number of characters in comment-responses]. I am unsure of the meaning of the terms "and" and "...
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2 votes
2 answers
598 views

Can I use a library that is dual licensed GPL + LGPL as if it was only LGPL?

PaGMO 2 includes both GPL and LGPL in their copyright notices: Copyright 2017-2018 PaGMO development team This file is part of the PaGMO library. The PaGMO library is free software; you can ...
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  • 123
6 votes
1 answer
183 views

Can an interpreted program be under any license without restricted by its GPL'ed run-time environment?

If I write a run-time environment based on some GPL'ed libraries and separately write an program interpreter which is passively used by the run-time environment, can a program (which is intended to be ...
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5 votes
1 answer
864 views

Release code with MIT dependencies under GPL

I am creating a game and want to release the code under a copyleft license (GPL 2 or 3). So far, so good, but there are multiple MIT-licensed library dependencies. Can I still release my code under ...
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2 votes
2 answers
1k views

License of code generated by a code generator

I am wondering under what license the code generated by a code generator that generates code from conditional code templates would fall under. Would it be possible to release the generator's source ...
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  • 161
1 vote
1 answer
53 views

Incorporating GPL patches into commercial version of our software

If we distribute our software both GPL and under a commercial license, do we have the right to incorporate third party patches into the commercial version of our software?
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  • 347
0 votes
0 answers
14 views

What's the license for a Qt based project? [duplicate]

https://www.qt.io/product/features I work for a company where I'm developing a project based on a number of Qt components. Not using Qt commercial license, after reading here and there about Qt ...
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  • 151
0 votes
1 answer
39 views

Am I allowed to use QtCreator while working for a company, if I'm using LGPL?

On Qt Modules and Tools for Designers and Developers if I choose LGPL then under Development Tools I see QtCreator is disabled. And LGPL v3: With LGPLv3 license option you can use the essential ...
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  • 151
20 votes
2 answers
2k views

Can I "upgrade" the version of CC BY-SA from 3.0 to 4.0 in my modification?

What I'm doing: I'm adapting a work licensed under CC BY-SA 3.0 Unported license to a different language. I'm indicating the original work and its license. I'm indicating that I have made changes to ...
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  • 1,329
20 votes
2 answers
2k 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 ...
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  • 8,415
13 votes
4 answers
759 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....
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  • 8,415
9 votes
1 answer
1k views

Including untouched LGPL library in a MIT-licenced project

Can I include a library licenced under LGPL 2.1 in an MIT-licenced project without any legal problems? Since it's not a compiled language, I would provide the full untouched source code of the ...
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4 votes
2 answers
703 views

Can my thesis LaTeX source files contents be under GPL v3?

I want to release all the LaTeX source files (*.tex), when I publish my thesis. I do not want to just release the PDF. So everybody can build my thesis with a LaTeX compiler from its source code. Can ...
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  • 275
14 votes
5 answers
7k 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?
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  • 631
10 votes
3 answers
619 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 ...
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8 votes
0 answers
3k views

Can I copy code licensed under Apache 2 to a project licensed under MIT? [duplicate]

I found a useful class in a project that is licensed under Apache 2.0. Can I copy it to a project licensed under MIT license? Add the library as dependency is not an option. Ideally the answer should ...
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  • 181
7 votes
1 answer
2k views

Can a video game have a GPL licensed engine and GPL-incompatible licensed assets? What about scripts?

I've heard that it's possible to use a GPL game engine that interprets/loads/JITs a so-called Game Pack which contains all the important game files such as sprites, sounds, music, levels, missions, ...
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  • 237
7 votes
1 answer
1k views

Compatibility between EPL and LGPL

I'm using LGPL binaries, as well as EPL binaries for my open source project. Is this OK? And if yes, does that mean I should license my project under LGPL? The binaries are being used as dependencies ...
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  • 179
13 votes
2 answers
2k 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 ...
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8 votes
1 answer
2k views

Shipping GPL'd binaries in commercial product

I've read lots of discussion on shipping commercial products that link against GPLv2/3 libraries, and products that include code from GPLv2/3 software. But I haven't been able to satisfactorily answer ...
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7 votes
3 answers
726 views

What does 'terms that are compatible with the GPL' mean?

From Octave's FAQ, Code written using Octave's native plug-in interface (also known as a .oct file) necessarily links with Octave internals and is considered a derivative work of Octave and ...
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  • 173
6 votes
1 answer
1k views

Bundling JetBrains OpenJDK in closed source software

I am developing a software that comes bundled with JDK. I am planning to use JetBrains OpenJDK for this purpose as it comes with swing support for HighDPI monitors. JetBrains OpenJDK can be found in ...
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  • 161
6 votes
2 answers
1k views

Can I publish my iOS app store app code to GitHub under MIT/GPL

I am about to start developing an iOS app which will be published on Apple App Store. While developing this app, I am thinking to push all the code to GitHub public repository; pull requests from ...
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5 votes
1 answer
299 views

Using public domain code within Apache-or-MIT licensed project

I'm interested in borrowing functions from a file in a project dual-licensed as MIT-or-UNLICENSE in my package that I intend to also be dual-licensed as Apache-or-MIT. Is this possible? How should I ...
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  • 183
5 votes
1 answer
137 views

How could I copyleft a document that contains a substantial amount of both code and prose?

I am writing a document in LaTeX that contains large sections of Python code and output. Typically, I like to license my writing under CC BY-SA 4.0 and my code under GPLv3. I have already placed a CC ...
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4 votes
1 answer
481 views

Can I be accused of using MIT library in my codebase that internally depends on library not compatible with MIT?

In general, when I make my code dependent on library, do I have to check its dependencies licenses or library license is the only one to be checked on my side? Can I be assused of using MIT library ...
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3 votes
1 answer
106 views

Would a multi-license consisting of all possible non-exclusive licenses work?

Dual licensing is used to maximize compatibility. One requirement is that licenses must be non-exclusive, although they don't have to compatible and as licensee you are free to choose a subset of the ...
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