Questions tagged [lgpl]

Use this tag 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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17
votes
5answers
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 ...
17
votes
1answer
2k 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 ...
13
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2answers
6k 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. ...
13
votes
5answers
708 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 ...
12
votes
2answers
1k 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 ...
12
votes
2answers
605 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 ...
11
votes
2answers
2k 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 ...
10
votes
3answers
5k 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 ...
9
votes
2answers
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 ...
9
votes
2answers
665 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 ...
9
votes
2answers
2k 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 ...
9
votes
1answer
939 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 ...
8
votes
1answer
335 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 ...
7
votes
2answers
2k 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 ...
7
votes
2answers
4k 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 ...
7
votes
2answers
1k 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 ...
7
votes
1answer
2k 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 ...
7
votes
3answers
5k 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 ...
7
votes
1answer
933 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 ...
7
votes
1answer
233 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 ...
7
votes
1answer
1k 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 ...
7
votes
1answer
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 ...
6
votes
3answers
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 ...
6
votes
3answers
3k 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 ...
6
votes
2answers
372 views

Taking a clone of an LGPL licensed source code and modifying and maintaining in a private repo

We started to use an open source library in one of our projects, and now we need to do some custom modifications to this library. The source of this library is distributed under LGPL and I need some ...
6
votes
1answer
300 views

Is it possible to use a LGPLv3 plug-in in a GPLv2 program?

From the license point of view: Is it possible to use a plugin written under "LGPLv3+" in a program protected by "GPLv2"? The plugin is built as a ".so" library and at ...
6
votes
1answer
201 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. ...
6
votes
1answer
404 views

Using public domain code in an LGPL program

I want to release a program that uses some public domain code (or a permissive license) from netlib.org under the LGPL license. Since the licenses (or lack of it) are compatible, there should be no ...
6
votes
3answers
856 views

iOS application using LGPL library

I am integrating an LGPL application to my iOS application. I am modifying the LGPL application in such a way that, I am integrating a new library to it. So the flow is like this: Appl Code >> LGPL ...
6
votes
1answer
297 views

Use of closed-source library in LGPL library

I would like to open source my software library under the LGPL license. But I'm not sure if I'm allowed to use that license, as my library uses another library which is currently closed sourced. By ...
6
votes
1answer
461 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 ...
5
votes
1answer
230 views

Is it possible statically linking Apache 2.0, BSD-2, or MIT libraries to AGPL v3.0 binaries?

TL; DR We are considering creating a series of dependency modules (UI, repository patterns, etc) as separated Android libraries. Could we use a permissive license (Apache 2.0, BSD-2 or MIT) despite ...
5
votes
2answers
187 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 ...
5
votes
1answer
2k views

Using Qt Designer to create UI design for closed source application

Am I allowed to create a closed-source application using the LGPL licensing scheme for Qt if I use Qt Designer to generate its user interface? I originally thought this was possible until I saw this ...
5
votes
2answers
341 views

Pull request ownership, who owns the code committed?

Say I create an Open Source project on Github licensed under e.g. LGPL like Qt. As I understand ownership of code, if I wrote a piece of code, I am free to change the license at a later point, as long ...
5
votes
1answer
147 views

Can I release a fork of an LGPL project under a commercial licence?

In the past I have made use of a third party project released under the LGPL licence. Recently the owner/creator of the project has archived the original repo and created a new version (seemingly ...
5
votes
1answer
690 views

How can commercial products use GPL or LGPL libraries?

I would like to design a web app with a free and paid tier that will include a WYSIWYG editor. I'm considering the following options CKEditor - GPL TinyMCE - LGPLv3 QuillJS - BSD 3-Clause SlateJS - ...
5
votes
2answers
9k 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 ...
5
votes
1answer
2k views

How can LGPL and proprietary licenses be combined?

I have a project, a big portion of which can be released as LGPL, but there are still some portions that must keep a more restrictive license. I'm not sure what exactly is allowed. The intent is ...
5
votes
1answer
59 views

Does learning boilerplate code from a project with a restrictive license make my own work derivative?

I have an application I want to put my own license on. In order to get my application started, I wrestled with boilerplate code issues I was not able to find answers for online. When I tried launching ...
5
votes
1answer
733 views

How To Package A Basic PySide2 Desktop Application Under LGPL For Sale - EXAMPLE PLEASE

What does a PySide2 (Qt for Python) desktop software application for Windows, Mac or Linux need to be distributed with in order to comply with LGPL license requirements? I'm talking about a simple, ...
5
votes
1answer
117 views

Providing license text on a display-less system

We are building a display-less system, which interacts with the user only through an audio interface (and some buttons). Our system is based on Linux, and as such we are using several GPL/LGPL ...
5
votes
2answers
412 views

Shouldn't LGPL v3.0 provide exception to section 5 (instead of section 3) of GPL v3.0?

Taken from section 1 LGPL v3.0 (https://www.gnu.org/licenses/lgpl-3.0.en.html): You may convey a covered work under sections 3 and 4 of this License without being bound by section 3 of the GNU GPL. ...
5
votes
1answer
343 views

Javassit: What has to be distributed when using the pre-compiled .jar?

I am using Javassist within my free open-source project (Javassist is included as pre-built .jar file which has been downloaded from the Releases section on their page, no source code). I'm now ...
5
votes
1answer
365 views

LGPL license in a concatenated JS file

I came across an old project in which there's a LGPL licensed JavaScript code was used. The code had the commented LGPL license information, but it was in a combined JS file (Not minified though) ...
5
votes
1answer
873 views

Changing QT library licence for application from LGPL to commercial

I consider myself an amateur and the following is based on my limited understanding. I also live in Germany, but copyright questions would probably cross borders anyway. Situation Let's assume I ...
4
votes
3answers
1k views

Can GPLv2 licensed software be re-published under LGPLv2.1?

I have read Can LGPL 2.1 licenses software be re-published under GPL 3.0? and followed link to GPL license compatibility matrix in the GPL FAQ, which is confusing me a bit: If I understand the table ...
4
votes
1answer
104 views

Am I allowed to make use of parts of the codebase of a library that is licensed under LGPL (v2.1)

For a game engine I am writing, I am planning to use a heavily cut down and thoroughly modified version of the Java logging library logback. Basically I am using their code for lookups and ...
4
votes
2answers
2k views

GPL for Embedded

I'm working in a company that develops and sells embedded systems. We are using Linux and some GPL software, alongside proprietary software. Some of the GPL softwares are modified to fit our needs. ...
4
votes
1answer
340 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. ...

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