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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16
votes
5answers
2k 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 ...
15
votes
1answer
1k 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 ...
12
votes
5answers
677 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
351 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 ...
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
1answer
614 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 ...
9
votes
1answer
238 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 ...
8
votes
2answers
329 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 ...
8
votes
3answers
3k 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 ...
7
votes
2answers
801 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 ...
7
votes
2answers
2k 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
723 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
421 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
1answer
637 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 ...
7
votes
1answer
858 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
899 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
2answers
1k 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 ...
6
votes
3answers
1k 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
2answers
231 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
91 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
3answers
3k 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 ...
6
votes
1answer
491 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 ...
6
votes
3answers
599 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
84 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
291 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
3answers
1k 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 ...
5
votes
2answers
182 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
87 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
253 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
210 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
92 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
291 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 ...
5
votes
1answer
556 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
1answer
84 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
76 views

Alternative implementation of an LGPL library

Is it possible to write alternative implementation of a library which is covered under LGPL 2.1 and keeping the same API ? The alternative implementation will be in the closed source.
4
votes
1answer
943 views

Is dual licensing a software that contains gpl programs possible?

I have seen that there is a question about gpl and dual licensing, but I know copyleft can behave different depending on the shape of the software. so here's my question: I have a package of lua ...
4
votes
1answer
112 views

What happens when a GPL licence is changed to a LGPL?

I'm using an open source library under GPL in a closed source project. If the libraries license changes from GPL to LGPL, does it mean the previous code (written when the library was GPL) should be ...
4
votes
1answer
34 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. ...
4
votes
2answers
82 views

Is it possible to liberate source code through double-licensing changes?

Let me describe the situation: there's an old piece of software (a game) with source code publically available. Source code was (officially, legally) released with following non-free license: The ...
4
votes
2answers
384 views

Can I use LPGL3 for library and Apache 2 for “main()”?

My project is a command which is split in library modules (the logic) and a "main" module, which glues my lib modules to make the CLI command. I don't really care about what people can write with the ...
4
votes
1answer
67 views

Is it more accurate to compare CC BY-SA to LGPL rather than GPL?

CC BY-SA, LGPL and GPL are all copyleft licenses. GPL's key feature is that by embedding one work in another (as defined in a software context), the combined work becomes GPL. With LGPL this is not ...
4
votes
1answer
496 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
744 views

Provide closed-source application with LGPL-Libraries

We plan to ship an application together with the required dynamic-libraries (SO/DLL), we link dynamically against one of these libraries, which uses the others libraries. The LGPL requires us to ...
4
votes
1answer
182 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 ...
4
votes
1answer
822 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 ...
4
votes
1answer
261 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 ...
4
votes
1answer
156 views

LGPL 2.1 snippet copyright attribution

I want to use portions of code from the FFMPEG library to provide screen capture function for a commercial application I'm writing. I do understand I need to make a shared library out of the function ...
4
votes
1answer
47 views

What are the disadvantages of distributing my commercial application along with Object code as per LGPL licence?

I am considering using a library licensed under LGPL which states... If you link other code with the library, you must provide complete object files to the recipients, so that they can relink ...
4
votes
1answer
242 views

Licensing of 3rd party libraries

I'm using a 3rd party lib in Java which has the LGPL license. E.g. jasperreports (https://mvnrepository.com/artifact/net.sf.jasperreports/jasperreports/6.3.0). Which license is relevant for me as a ...
4
votes
1answer
86 views

LGPL licensed software distributed with cx_Freeze

I am developing a python GUI for my company using PySide which is under LGPL license. My company would like to sell it and thus it can't be open source. From my understanding of the LGPL, I need to ...