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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216 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
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2answers
404 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
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1answer
311 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
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2answers
174 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
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1answer
1k 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
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1answer
1k 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 ...
4
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2answers
52 views

GitHub Repository with MIT license with one file under GNU license

I have a repository that is licensed under MIT license. The repository is still private, but I want to make it public soon. Nevertheless, there is a file (a Makefile), that is licensed under GNU LGPL ...
4
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2answers
600 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
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1answer
129 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
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1answer
99 views

How to use LGPL with embedded firmwares?

I am developing a firmware for embedded devices. The project contains many libraries, plus one main executable that uses all the libraries. Each component is compiled individually. In the final step, ...
4
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1answer
81 views

Can I change the license of a forked project from LGPLv3 to MIT?

I have forked a project with LGPLv3 license and I did there a lot of changes. Can I distribute a new version under the MIT license? Or only the possibility is to write the code from "scratch"? ...
4
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1answer
2k 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 ...
4
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1answer
1k 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
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1answer
345 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
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1answer
158 views

Distributing LGPL library (OpenAL) as part of the MIT licensed game engine

Background: I'm writing a game engine (a set of libraries actually) that simplifies game development with C# language (OK it is yet another game engine :). My plan is to make it as free as possible. ...
4
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1answer
35 views

Test framework license selection

I am writing some kind of test frame work in Python3. I am about to publish it, I am looking for right license for it... and I am confused :( Here is what am looking for: common/well known license ...
4
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1answer
266 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 ...
4
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1answer
287 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
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1answer
67 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
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1answer
343 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 ...
3
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3answers
826 views

LGPL HDL in larger FPGA design

There is a project called NetFPGA that has HDL code for various Ethernet uses in an FPGA. The project is listed as LGPL. From a software perspective, my understanding is that if you dynamically link ...
3
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2answers
2k views

Bypass LGPL license using wrapper library

I wanted to use a library which is licensed under LGPL (free, only for open source projects). I wanted to use that in a commercial project. Is that possible that I can develop an open source wrapper ...
3
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1answer
576 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 ...
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2answers
4k views

iText 2.1.7 in commercial Project

This question was originally asked on Stack Overflow but since licensing questions are off topic I move it here. So here comes the original question about this open source library: I want to use the ...
3
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1answer
477 views

GNU Lesser General Public License with signed C# assembly

We have a closed source software written in C# that we sell. All of our assemblies are signed. We want to use a third party assembly, that is published under the GNU Lesser General Public License v2.1....
3
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2answers
2k views

Implication of LGPL and MIT licenses for commercial use (of JSXGraph library)

I'm interested in using the JSXGraph JavaScript library in a website project. The library is covered by the LGPL and MIT licenses. I'm new to licensing and am trying to answer the following question:...
3
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1answer
90 views

Does it make sense to have a program under the LGPL?

A little background: I have a library project which I put under the LGPL v2.1. However, I have two applications inside the project tree using the library. It would be somewhat inconvenient to make ...
3
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1answer
103 views

Understanding GPL & LGPL: Free Software with zero-cost, proprietary libraries

Background: This question is derived from a previous question. I am writing a Blender add-on which enables the use of Blender with a piece of hardware (i.e., a lightfield display). Blender and the ...
3
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1answer
202 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 ...
3
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1answer
54 views

Need help understanding GNU LGPL terms

I'm a new developer and recently have to work on project where I guess using arduino lib will be easy, because writing my own library will be a lot more time consuming. This isn't a mass production ...
3
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1answer
147 views

Is the Qt Network Authentication module still LGPL?

I saw this question asking if QT Network Authentication module is licensed under LGPL or not. The answer states that since this module is not specified under Add-ons available under Commercial ...
3
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1answer
143 views

Does it make sense to license an application (not library) under LGPL?

Say, I have a game engine which is meant to be an executable, not a library (i.e. it has its' own main() and has the top-level control. It calls on other libraries but cannot be used as a dynamic ...
3
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2answers
407 views

Are there legal issues with bundling one's own LGPL-licensed code with proprietary code?

My company's legal team is currently worried about how to move forward with some app releases intended for our enterprise customers. Here's the gist of it: We have many products referred to as "apps"...
3
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1answer
650 views

LGPL static linking

I know there are already many other questions asked about LGPL requirements, but none of those did match my case I want to distribute a free application which uses a LGPL-licensed library (Qt) ...
3
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1answer
55 views

Commercial app with optional GPL software usage

Say one develops a closed source app that can produce a file of its own format like .ll .Then one asks the user to run a GPL licenced batch script that uses ffmpeg(GPL) to do the final bit. Note that ...
3
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1answer
54 views

Some questions about LGPL v.3 (support, warranty…)

I participate in the development of a soft that will be distributed on a commercial basis. Question: 1. If I take the open-source Library (under LGPL v.3), will there be any obligations to support ...
3
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2answers
216 views

What is the purpose of the LGPL re-linking requirement?

I understand that in using a LGPL library in your application, you have to provide a re-linking mechanism for the end user (by linking to the library dynamically or providing all your object files ...
3
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1answer
116 views

Community and enterprise editions of LGPL software

Red Hat has community and enterprise editions of it's application server. WildFly is licensed under LGPL. JBoss EAP is based on WildFly and costs a lot of money. How is it possible that they don't ...
3
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2answers
278 views

If I wrote software using QML and the community version of Qt, am I required to disclose the source code of the whole software?

Let's say I made an application using Qt's QML language and I didn't have a commercial license, am I required to disclose the whole source code for said application or just the modules I modified (if ...
3
votes
1answer
53 views

Can I use bits of source from another library in an original work without having to worry about license issues?

I've been writing a docking framework in JavaFX. This is a new library with original work. However, I have been reading the source code of a few other open source docking projects to get some hints ...
3
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1answer
187 views

Subclassing, Unity, and the LGPL

I want to release a package on the Unity Asset Store. Based on this answer, it looks like the best option for my situation would be LGPLv3. However, after doing plenty of research, I've stumbled ...
3
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1answer
1k views

Does compiling a JS bundle with webpack/browserify violate the LGPL license?

According to the LGPL license, you must release your source code if you statically link a library. Here's an excerpt from tldrlegal.com: If the software is statically linked (i.e. compiled into) ...
3
votes
2answers
116 views

Licensing questions

I've been developing a Django app for my work (scientific stuff), and I'm planning to release it on GitHub very soon. But I do have licensing questions to be sure to do it right. This work is ...
3
votes
1answer
117 views

What exactly is terminated by the breach of LGPL?

One of dependencies of a game engine that I'm using has an LGPL license. If I, for some reason, forget to upload the license file, do I lose rights to my own part of the code that isn't GPL? Likewise,...
3
votes
1answer
36 views

Publish a heavily modified version of forked NPM package

I have forked and modified a legacy open-source NPM package for my personal use. And I thought publishing my modification might be useful for others. The "heavily modified" in my case is: ...
3
votes
1answer
127 views

Electron, Chromium and ffmpeg licencing confusion, how to build electron with licence compatible ffmpeg?

Intro: Recently I'm working on an electron based application that is free to use but also has subscription based services. It came to my attention that ffmpeg is shipped with electron, which has GPL/...
3
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1answer
56 views

Choosing a license in Arduino environment

I wrote a C++ library for Arduino. The source code have the following specificities: it includes headers, uses functions, macros, and structures/classes (and their methods) from LGPL libraries (...
3
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2answers
46 views

Does LGPL allow Pro / Enterprise versions of the same library?

I have a good understanding of GPL, LGPL, dual-licensing, etc. However I have a specific doubt about the meaning of "linking" in the LGPL. Suppose that: The library is released under the ...
3
votes
1answer
120 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 ...
3
votes
1answer
70 views

LGPLv2.1: Distributing dynamically linked executable without the LGPL library

I am developing a proprietary (non-open source) commercial application that depends (both directly and indirectly through direct dependencies) on some LGPLv2.1+ libraries (specifically some MinGW64 ...