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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Creating a wrapper library for LGPL code and distribute the used LGPL code as its own library?

I've been working on a proof of concept prototype for my company. The libraries for the board I've been using are licensed under the LGPL. We've been happy enough that we're now considering using this ...
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147 views

Usage of a part of a EPL library in LGPL or Apache 2 project

As I understand it, I am allowed to link a eclipse licensed jar to an LGPL or Apache 2 licensed open source project, without to change the projects license. Correct me if I am wrong. The question is,...
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How is the LGPL different from the GPL with a class path exception? [duplicate]

As far as I understand, the GPL is a license with an incredibly strong copyleft trait. That is, anything that even links to it, let alone modify it, needs to be released under the GPL. Due to this '...
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1k views

What is the difference between an open and closed consumer device?

The Qt Open Source Licensing Obligations contain the following line: Must make “open” consumer devices What does this mean? I know about the linking mechanism required by LGPL, and that part of ...
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2answers
125 views

GNU Lesser GPL with additional requirement for customer reference

I am planning to release a software under GNU Lesser GPL (not sure yet if v2 or v3 should be used). But I would also like to state a requirement that whenever my software is used commercially the ...
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2answers
87 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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1answer
75 views

Are YouTubers Allowed to Record any Game [closed]

For games like minecraft it is released under "LGPL 2.1 or later", does this mean that if you record Minecraft the video must also be released under the LGPL 2.1 or later? Is a separate license ...
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1answer
52 views

Can I license a library as LGPL after it has been released under no license for a while?

I've written a C library (minilibc) and at the time of releasing it I was unsure as to what license I was going to use, so I left it unlicensed. I've now decided on the LGPLv3+ and am unsure whether ...
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1answer
528 views

Can I use code from an LGPL v2 licenced project in a BSD 3-clause licenced project?

There is a BSD 3-clause open source project I would like to contribute to. The code I would like to contribute is code that I do not own from an open source library released under the LGPL version 2. ...
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1answer
101 views

Is the Epson license Open Source?

I plan using this library https://github.com/endlessm/epson-inkjet-printer in a commercial product. The licensing conditions for it are the following: This program is distributed under GNU Lesser ...
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1answer
44 views

exe using LGPLv3 lib: must I also ship the exe's object files?

If I ship a closed-source .exe that dynamically links to an LGPLv3 library (such as Qt), must I also ship the .obj files from which I built the .exe? This podcast at 34:30-36:00 claims so, and also ...
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1answer
21 views

Do I have to include a copy of GPL 2 if I'm using LGPL 2.1 (or later)?

According to FSF, to use LGPL in my library, I have to include both the copy of GPL & LGPL. I understand that the reason being LGPL 3 is now written as additional permissions over GPL 3. However, ...
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1answer
55 views

Can I use an LGPLv3 library in my WordPress plugin

I want to publish a plugin on WordPress. My plugin uses a library which is licensed under the LGPLv3. I am planning to ship the library along with plugin code, however, the library isn't statically ...
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1answer
146 views

Is LGPL compatible with GPLv3?

If I have a project using LGPL (GNU Lesser General Public License), would I be able to use within it another component which is under GPLv3? Is there any site where I can see all the compatible ...
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1answer
1k 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 ...
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2answers
27 views

Opensource license for github Python project which uses lgpl libraries

I'm about to make my first Python repo on github public and it needs a license. It imports four libraries, without modifying them, it merely makes use of their functions. These libraries are in ...
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1answer
26 views

LGPL: Can drivectl utility code be modified under LGPL license?

As driverctl utility is LGPL compliant so what will happen if we change the code of driverctl ? This is a ask from one of the client, so can anyone answer what will happen if we change the code of ...
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1answer
36 views

GPL/LGPL license: convey source code by linking to original author

Scenario: you distribute your program in binary format, and it uses a GPL or LGPL library. In addition to the required conditions on your part of the application, you must offer a way to obtain the ...
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1answer
310 views

Can LGPL 2.1 licenses software be re-published under GPL 3.0?

I have software licensed under LGPL 2.1 and I want to modify it and re-publish the whole software under the GPL 3.0 license. Is this legally possible? I think so, but I'm not completely sure. LGPL 2....
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1answer
120 views

can I remove files and folders in a PHP package without violating its license?

Let's say I'm working on a PHP application and I want to integrate some PHP packages like TWIG. Using Composer or some other automated management or code assisting technologies is irrelevant here. All ...
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2answers
555 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:...
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1answer
60 views

Does interacting with a (L)GPL licensed library through PHP7.4 FFI count as a derived work?

Problem description I recently wrote a PHP(7.3) wrapper for accessing some git functionality (I use git to create incremental backups). Another wrapper I wrote is for gpg (to encrypt my backups). ...
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1answer
43 views

If authors of open source software can be held liable for (accidentally) infringing (vaguely worded) software patents, why add one's name to it?

If person A writes software and says "I wrote it and this is my name", she can potentially be sued by a patent troll who says "I invented the program statement and the variable". If person A writes ...
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1answer
58 views

How do I include GPLv3 code in a LGPLv3 or MIT project

I have no doubt that this question has been answered countless times before, but my searches have not produced an answer yet. I'm writing a library using LGPLv3 and I would like to copy a couple of ...
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1answer
133 views

Is using LGPL 1.2 or EPL 1.0 licensed jar allowed in proprietary software in Docker?

I am creating a proprietary java application which uses some open source jars licensed with LGPL 2.1 or EPL 1.0. I am deploying the application in docker container with all jars inside it. Is there ...
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1answer
120 views

Redistributing 7-Zip Binaries with LGPL & BSD 3-clause License

We want to use 7Zip to extract the contents of the ISO file in our paid product. There is no other API free library available as of now that can unzip ISO files on all Windows platforms that we want ...
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1answer
100 views

Is the Qt Network Authentication module LGPL?

The documentation is unclear whether the QT Network Authentication module is licensed under LGPL or GPL. Has it changed recently?
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1answer
153 views

Publishing Java project with LGPL licensed module

I have a Java project made by multiple JARs and one of them is LGPL licensed. I know that this kind of license doesn't propagate through the modules that uses it. But every code modification that I ...
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1answer
289 views

How to write additional permission for LGPLv3 license

I’m planning to release my code under LGPLv3 license but I can’t find answers to several question. Let me describe my situation: I’ve created library and want to use LGPL v3 license for this code; ...
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1answer
111 views

Does inbound=outbound apply to GPL-family without a CLA?

The traditional expectation for contributions to a free software project are "inbound=outbound" [1] [2]. That is, if the project is under license X, contributions are made under license X. Does this ...
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1answer
1k views

FFmpeg LGPL licence and embedded codecs

I want to use FFmpeg in commercial software using its LGPL licence without enabling the GPL add-on. However, the libavformat library allows decoding for a lot of codecs straight out of the box. These ...
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1answer
48 views

What license to use while using GPL/LGPL source code?

There is an application A. It uses the GPL license. There is another application B that takes all of A's code and improvises it. In its repo, both GPL and LGPL license can be found. We are building an ...
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1answer
73 views

If I distribute amazon AMI with my service that calls LGPL software, do I have to provide source code?

I have a question about licensing, and because my legal English isn't really strong, I was hoping for a simple answer... My idea is to create a set of services, that uses command line programs which ...
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0answers
80 views

Redistributing LGPL source code or GPL packages on a BSD Licensed package

I have a python project licensed under BSD-License. On its bottom I use a source code written in C++ which is licensed as LGPL and I have an optional dependency on a python package licensed under GPL. ...
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0answers
183 views

What happens when someone merges Apache 2.0 and LGPL libraries into a GPL-2 derivate?

I used a PHP library, which in turn is elementary based on libraries published with an Apache 2.0 license and a LGPL license. The author himself has published his library under a GPLv2 license. ...
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0answers
136 views

Building programs using qmake

Can I use qmake to build Non Qt programs with a closed source or MIT licence? The c++ code that I'm building does not include any Qt headers or link to any Qt libraries. The only mention of Qt in ...
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0answers
211 views

libquadmath in binary code

I'm developing a small closed source library in C++ for a small company using gcc. For the numerics part I need 128bit floating point arithmetics. This leads gcc to pull in libquadmath. As far as I ...
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1answer
421 views

Licenses PyQt and QT

I would like to use PyQT5 and QT5 to create an -internal- application for a friend and his company. I would like to use PyQT GPL license and QT LGPL license. To respect these licenses, I need to: ...
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0answers
62 views

“Free” licenses understanding and workaround for a simple java app

I'm developing a java app with my hands and feet. I intend to share it with people and it may become commercial. He who knows can write it all down in notepad but I have been using Eclipse. The ...
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2answers
848 views

Can someone explain the basic requirements of Open Source Qt LGPL to a beginner?

I’m a automotive electronic and electrical engineer with little to no software experience. I need to hire a developer to develop Windows GUI application that is used to configure and program a ...
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2answers
198 views

Am I allowed to provide compiled binaries of open source libraries?

I have a project which is open source. I use the gstreamer library in my application. Can I distribute my application on github and provide a compiled version of gstreamer with it (so users dont have ...
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2answers
939 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 ...
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1answer
46 views

LGPL3 code in GPL3 project

It seems like this should be obvious, but I'm not finding an answer. LGPL is a subset of GPL, IIRC, so can I use LGPL code in a GPL project?
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1answer
832 views

Can I use GPL 3.0 or LGPL licensed libraries in my commercial closed source IOT product?

I am building an IOT product, an home automation solution, where I am using ESP8266 Arduino Core that is LGPL-2.1 and also few libraries which are GPL 3.0 licensed. For security reasons I do not ...
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1answer
87 views

Concatenating LGPL code

I want to reuse some LGPL'ed code in a commercial piece of software. Said code is here if you're particularly interested. However, the library itself (written in JavaScript / CSS) has been split ...
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1answer
171 views

Ethereum's source code

Am I correct to assume that I can copy Ethereum's source code, modify it to create my own blockchain and issue my new currency, without any problems provided that I follow GPL and LGPL?
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1answer
191 views

Can i use Qt Virtual Keyboard?

Is this design correct? System Qt 5 has qtvirtualkeyboard thich is GPL. Can I link my proprietary app with system Qt? Can I create open source app which run Qt Virtual Keyboard then load my app as ...
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1answer
53 views

Is it legal to create an auto-extractible SFX archive containing mixed commercial/LGPL software?

I wondered something : - I develop a little standalone tool for a commercial application written in C++ with Qt (lets say "test.exe") - Not having a commercial licence of Qt, I use Qt LGPL license - I ...
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1answer
151 views

Would I violate anything if I use vlclib for android in my closed-source app?

I'm developing a video player and I want to use vlclib for android for better codec support. I have some questions in mind regarding use of the library in my project. Would I violate anything if I ...
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1answer
841 views

Can I use the Qt Installer Framework in a commercial product?

The Qt Installer Framework (QTIFW) is part of the Qt Framework which is available under the LGPL3. This page lists the components that are available under each license. Unfortunately it doesn't list ...