Questions tagged [lgpl]

For questions about the GNU Lesser General Public License, how to apply it, or how to re-use works under this license

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If I can't provide GPL source because a supplier did not provide it, am I at fault?

Let’s say that I paid a third-party company to develop a new application for me. I also make myself clear about the need to have the full property of the code at the end of the developing phase. I ...
Mburns's user avatar
  • 231
21 votes
2 answers
4k views

Contributor asking to remove their contributions

I have a project licensed under the LGPL-3.0. A major contributor recently stopped contributing, and is now requesting all their contributions to be removed from the project. All the code in the ...
pauliesnug's user avatar
20 votes
5 answers
3k views

How to prevent contributors from claiming copyright on my LGPL-released software?

I have published the first version of my software on my company's git repo and some other developers outside of our company have shown interest in contributing to our work. We are releasing our ...
TonySalimi's user avatar
19 votes
1 answer
3k views

What is the difference between GPL + Classpath exception vs LGPL

Java and a few java libraries provide a "classpath" exception. To me, this seems similar to the LGPL's linking exceptions. What is the difference between the GPL with a classpath exception and the ...
xenoterracide's user avatar
17 votes
2 answers
6k views

Is Apple allowed to distribute GPLv3-licensed software through its iOS App Store?

This question is specifically about GPLv3, LGPLv3, and Apple's App Store for iOS devices. Given the additional restrictions Apple imposes on iOS users (i.e. not allowing them to modify and run GPLv3 ...
Tenders McChiken's user avatar
17 votes
1 answer
5k views

PySimpleGUI, until now, has been distributed under the GPLV3, but just became a subscription model. How does that work?

PySimpleGUI, a GUI framework for Python, has previously been published under the LGPLv3. They just announced that they are changing to a subscription model with PysimpleGUI 5, and that previous ...
Jazz Weisman's user avatar
14 votes
2 answers
9k views

Can I sell a proprietary software with an LGPL library bundled along with it, without making my source code public?

I am making a commercial application for my own company. I want to use PySide2 in it which comes under the LGPL license. I will be using PySide2 without any modification to it for designing the GUI. ...
user5793353's user avatar
13 votes
5 answers
759 views

Appropriate licence for later merging back

I am a library developer. I want to open source it soon, but I'm not sure what license will work best for me. My main concerns are: I want to provide a commercial license for somebody who is willing ...
dileping's user avatar
  • 247
13 votes
1 answer
4k views

Do I Need to Publish my Source Code because of LGPL?

I want to use the 7-Zip program to do some archive manipulation and creation. I have an app that has a proprietary closed source license. For this scenario, I would include the 7-Zip program in its ...
Elliot Huffman's user avatar
13 votes
2 answers
1k views

Are derivative works a subset of combined works?

This question stems from discussion of a question on programmers.stackexchange.com. In the LGPL 3.0 section 4 "Combined Works" it states: You may convey a Combined Work under terms of your choice ...
Still.Tony's user avatar
12 votes
4 answers
8k 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 ...
Zimm i48's user avatar
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12 votes
2 answers
16k views

What is the difference between LGPLv2.1 and LGPLv3?

Below text is cited from https://www1.qt.io/faq/#_Toc_3_6 LGPLv3 is the current version of the GNU Lesser General Public License. LGPLv2.1 is an older version and not recommended by the Free ...
Zhongkun Ma's user avatar
11 votes
2 answers
3k views

Is it possible to use a library under the EUPL license for a commercial closed-source project?

I want to use this library in my project. Author says it is under the LGPL license, but one of its dependencies is under the EUPL license. EUPL license isn't clear about if a closed-source ...
Broken_Window's user avatar
11 votes
2 answers
3k 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 ...
Tim Malone's user avatar
  • 2,120
10 votes
2 answers
1k views

Own LGPL code in proprietorial project

I've written a library that I use in closed-source project. After a short discuss with my boss we have decided that this library can be useful for many others and we made this library open source ...
ElDorado's user avatar
  • 203
10 votes
1 answer
2k views

Can the GNU LGPL be removed from a piece of software?

Maybe I'm searching with the wrong terms, but can the GNU LESSER GENERAL PUBLIC LICENSE be removed from a software project like this browser extension? The commits in question are these https://github....
Thomas R. Koll's user avatar
10 votes
2 answers
1k views

Redistributing LGPL 2.1 code compiled by a proprietary compiler

Can I redistribute the binary form of someone's LGPL code compiled with a proprietary compiler which is not included in the operating system? LGPL 2.1 says: For an executable, the required form of ...
fujii's user avatar
  • 391
9 votes
3 answers
5k views

Can I make my own license? [duplicate]

I was getting frustrated because I really wanted to use a GPL Family license for a piece of software I am developing. However, some of my target audience, OS Developers, are closed source (looking at ...
IntegralPilot's user avatar
9 votes
3 answers
2k views

Extracting business logic from a LGPL v3 project and rewriting my own, is my work considered derivative?

There is a framework that implements some business logic for a niche organization. That project is open source, pushed to gitlab and uses a LGPL v3 licence. What I want, is to extract the business ...
DEBtt's user avatar
  • 91
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 ...
Vinícius's user avatar
9 votes
1 answer
1k views

Understanding LGPL implication on #include

I asked about dynamic linking in C++ in stackoverflow (https://stackoverflow.com/q/64039902/14321464), however, I got intrigued on the responses about my desire to keep my source code uncovered by ...
Jacobson123's user avatar
9 votes
3 answers
7k views

Modifying an LGPL library and using it in a commercial product

I found a library which helps me implement something for a company: https://www.openmuc.org/sml/ Its license is LGPL. Unfortunately, I'd like to use this library for an Android project and there I ...
Kevin Meier's user avatar
8 votes
5 answers
3k views

Does license prohibition of illicit / malicious use or modification clash with GPL's freedom to modify?

I am building a decentralized community service, where it is critical for each client to run a "legitimate" build version in order for the service to operate properly. The client versions do ...
dtech's user avatar
  • 479
8 votes
2 answers
3k views

Using GPL or LGPL licensed framework for web application

I am developing a web application which streams videos. For the frontend I intend to use the richfaces framework for jsf. That framework is licensed under the LGPL v2. Does that mean that I have to ...
insa_c's user avatar
  • 189
8 votes
1 answer
5k views

Can I use (statically or dynamically linked) mingw-w64 runtime libraries for commercial purposes?

I'm planning to use mingw-w64 for commercial software and I'm looking for info about it's licensing. I was looking through licenses included in package and some discussions on forums and mailing lists ...
gomago's user avatar
  • 81
8 votes
1 answer
910 views

Can I Commit LGPL3 Derivative Work To An Apache 2 Licensed Project?

I am using a helpful project that is licensed under the LGPL3. I have taken some of the useful code out of it and refactored it into a wrapper class and would like to add it to an upstream project. ...
opticyclic's user avatar
8 votes
1 answer
939 views

MIT license ok if dependent package uses LGPL

I would like to publish my opensource project with an MIT license but was wondering if that is ok given that a dependency (not a direct dependency) seems to have LGPL. These are my python packages ...
Chris's user avatar
  • 183
8 votes
1 answer
469 views

Is monkey-patching considered a modification of the original work licensed under LGPL or MPL licenses?

I'm interested if monkey-patching is considered a modification by LGPL 3.0 and MPL 2.0 licenses. Specifically, I'm interested in monkey-patching of ruby code. E.g. I require an LGPL library (e.g. ...
Danny Ocean's user avatar
8 votes
1 answer
661 views

What exactly do I need to do license-wise when using LGPL 2.1 licensed code

I am using a LGPL (GNU Lesser General Public License version 2.1) licensed library in my Java project I'm soon about to release. In order to solve a bug in this library I have copied a particular ...
Stefan Vahlgren's user avatar
8 votes
1 answer
2k 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 ...
peco's user avatar
  • 189
7 votes
2 answers
1k views

Can I have a GPL-compatible license that change by use?

I currently have a project that is licensed under LGPLv3. I would restrict its use so, if the library is used by financial people, war projects etc the license falls into GPL3. First, this kind of ...
Marco Sulla's user avatar
7 votes
4 answers
618 views

LGPL obligations implementation in beta versions

As far as I know, LGPL mandates that the respective licenses are featured in file and in app visual representation. The former is a simple distribution matter, but the latter is a gui feature. Assume ...
dtech's user avatar
  • 479
7 votes
1 answer
3k views

Can your MIT library use an LGPL library?

If you use a library with LGPL 2.1 license (e.g., PHPMailer) in your also open source library, can you release your library as MIT license if you didn't actually modify PHPMailer? E.g., All you did ...
IMB's user avatar
  • 181
7 votes
2 answers
1k views

Using FFmpeg only for decoding in closed source commercial application

There are already lots of questions about FFmpeg licensing but I could not find one for my specific case. I'm making an application which is able to play video files using FFmpeg (through a LPGL ...
ju2pom's user avatar
  • 71
7 votes
3 answers
4k views

Dynamic linking LGPL library and licensing in Windows Store app

I've a project in which I would like to use an LGPL licensed library, in this case FFmpeg without changes. I've run through questions and answers regarding LGPL in commercial products with conclusion ...
Romasz's user avatar
  • 171
7 votes
2 answers
5k views

What are the implications of glibc (GNU C Library)

What are the implications of glibc? The library is installed on most GNU/Linux systems (and maybe others, don't know). The thing is it is supposedly licensed with LGPL, but I am not sure which version ...
Spidy's user avatar
  • 175
7 votes
2 answers
2k views

Which standard copyleft licences can be applied to Unity assets?

I would like to release a framework for Unity under a copyleft licence but have some concerns. My goal is for people to be able to use the framework to develop their own projects and only be required ...
Kelly Thomas's user avatar
7 votes
1 answer
2k views

LGPL-licensed code reuse in MIT-licensed project

I have an MIT-licensed (in plans, currently it's not published) project. And I've found an implementation of the required algorithm in an LGPL-licensed project. Am I allowed to include that code in my ...
handicraftsman's user avatar
7 votes
1 answer
3k views

LGPL and static linking when third-party tools are required - providing an alternate version that can accept a replacement LGPL library

I've been through a lot of the LGPL questions here but haven't found this specific question. This is probably the closest to my situation: Dynamic linking LGPL library and licensing in Windows Store ...
David's user avatar
  • 171
7 votes
1 answer
67 views

LGPL and AGPL combo - how?

I'm writing a library and I want to license it so that if you modify and use it, even at a network service, you will need to disclose the modified source code of the library (as in the AGPL) but it ...
Dan's user avatar
  • 283
7 votes
1 answer
2k views

Can I use/distribute LGPL command line software in mine that isn't LGPL?

I've developed a little software that use FFmpeg in command line mode. To further clarify: My software launch several times ffmpeg.exe that is stored inside the same folder as my .exe. User never ...
Alex DG's user avatar
  • 133
7 votes
1 answer
519 views

GPL Application linked to a LGPL library loading proprietary-plugins

This is a bit similar to what asked in this question, unless that here the case is that the application only directly loads LGPL code, and this one then may dlopen a proprietary lib, so: GPL Program ...
Treviño's user avatar
  • 121
7 votes
1 answer
2k views

How to comply to LGPL with Maven/JAR packages?

I’m using Maven to package my JavaFX project for distribution. Since JavaFX is licensed under LGPL, I need to allow users of my project to replace its DLLs by newer or compatible versions. But I don’t ...
Mathomatic's user avatar
7 votes
1 answer
694 views

LGPL3 library in Apache 2.0 licensed library

Can I open source my project under Apache 2 if it uses a LGPL3 library without modifying it? I'm not planning to distribute the LGPL3 library along with the code. My understanding is that LGPL3 ...
m0s's user avatar
  • 171
6 votes
2 answers
1k views

Compliance with LGPL for a Locked STM32 in a Commercial Product?

I'm working on a commercial project involving an STM32 microcontroller, designed to be locked down for security and business reasons. The device can only be updated through a bootloader controlled by ...
WITC's user avatar
  • 63
6 votes
1 answer
2k views

Is LGPLv3 against tivoization? Or only GPLv3?

The LGPLv3 license text states: e) Provide Installation Information, but only if you would otherwise be required to provide such information under section 6 of the GNU GPL, and only to the extent ...
ruben2020's user avatar
  • 2,198
6 votes
2 answers
653 views

What's the closest to GPL3 I can get while staying compliant with the EPL and APL?

The Eclipse Public License and the GPL (2 or 3) are not compatible. [ ... ] you may not combine EPL and GPL code in any scenario where source code under those licenses are both the same source code ...
cat's user avatar
  • 111
6 votes
3 answers
2k views

Do I need to host Qt source when compling with LGPLv3 license?

We are using Qt(5.3.2 - opensource) for one of our applications that we are going to be distributing (closed-source). We dynamically link to Qt and have made no modifications to Qt. At Qt's Legal ...
g19fanatic's user avatar
6 votes
1 answer
123 views

Updating the URL in the GNU LGPL 3.0 License

I have an Open Source project under the LGPL 3.0 License. This project was created before the official text of the LGPL License used HTTPS in the URL for the Free Software Foundation website. I want ...
SomeFossDev's user avatar
6 votes
1 answer
1k views

Ran into "GNU Lesser General Public License version 2" in a copyright notice - what license is this? LGPL 2? LGPL 2.1? Or...?

Long story short, I'm working on building the debian/copyright file for a massive package, and have ran into the following rather confusing phrase in the copyright header of one of the source code ...
ArrayBolt3's user avatar

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