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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Copied code from LGPL library to my executable (what copyright notice should be? LGPL or GPL?)

I have a program containing only one file: main.cpp. I copied there a few lines of code from LGPL licensed file (from an LGPL licensed library). What copyright notice should I put at the top of my ...
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0answers
25 views

Distributing a proprietary library that uses an LGPL library

I would like to create a JAVA library, that will use an LGPL library. The LGPL library is a library that provides an API to create charts, whereas my library will provide a more high level API like ...
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0answers
44 views

Linking to Apache v.2.0 software in LGPL v.2.1 project

I am working on an open source project for an academic competition. Our customer requires us to use for our product the LGPL v.2.1. We have to use QR codes in part of our application, and we found ...
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0answers
67 views

How to include license information for library that imports LGPL licensed library?

I have made a python library that imports an LGPL licensed python library. My library does not modify the LGPL library, but it cannot operate without the import. Is my library a "combined work&...
2
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1answer
118 views

Using LGPL 2.1 in a closed-source project

I'm making a commercial closed-source project in C++. I use this library, uchardet, which is licensed under MPL 1.1 or GPL 2.0 or LGPL 2.1. For say LGPL 2.1, can I statically link uchardet to MY ...
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0answers
138 views

Which license to use LGPL-3.0, MPL-2.0 or AGPL-3.0 for a library that manages files locally?

I'm open-sourcing a library that tries to make managing local files easier by enabling full text search, encryption, corruption handling & remote transfer/distribution of files. What license to ...
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0answers
235 views

FFMPEG License as a separate library

I am currently writing a video project using FFMPEG shared library with other license abiding projects (like libass and freetype2). I have a script that compiles FFMPEG and the other libraries as a ...
2
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0answers
93 views

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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0answers
179 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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42 views

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 '...
2
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1answer
171 views

Software under LGPL and API under GPL, which license do addons follow?

In a specific case where the software is licensed under LGPL but its API is licensed under GPL, which of these should addons (that use the API) follow? Additionally, if it's LGPL are addons required ...
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2answers
2k 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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1answer
56 views

About unlicensed files

I was trying to releasing a library with LGPL license. However I had discovered that many time ago I copied and pasted in the library a header file defining some constants. This file was found on the ...
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2answers
103 views

Finding right license to support open source community only. GPLv3 too strict, LGPLv3 too permissive

I have created an open source library ( https://github.com/pitschr/knx-link ) that is designed to be used by other open source projects; not by end users. Currently it is licensed as GPLv3. My main ...
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2answers
3k 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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1answer
901 views

Qt's open source license (GPL or LGPL)

Ive been reading about Qt and its licensing and ive come across this part: Qt is available under different licensing options designed to accommodate the needs of our various users: Qt ...
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1answer
2k 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
79 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
29 views

In repositories, does software under the LGPL include a copy of the GPL?

The repository for something that I need to use has 2 license txt. One which is the LGPL and the other the GPLv3. I heard from a member of their Discord that this is because the LGPL is an extension ...
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1answer
35 views

LGPL and different architectures

I am in the midst of writing software using LGPL libraries, which will be part of an image for a device. Am I obliged to provide object files for different (micro)architectures than the device the ...
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1answer
60 views

Can a LGPL project use contributed code after the original contributor withdrew it and was banned from the project?

"Project A" is released under LGPL ver 2.1 or, at user's discretion, above. This project is part of a bigger platform. "Contributor A" submitted a highly-popular merge request to ...
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1answer
70 views

LGPLv2.1 + GPLv3 = Okay?

This compatibility chart provided by GNU appears to state that a GPLv3 program can include a LGPLv2.1-only library. This doesn't make sense to me as the LGPLv2.1 license would have to be compatible ...
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1answer
73 views

What legal considerations needs to be made for distributing a commercial/closed source software which utilizes LGPLv2 open source libraries?

I am developing a Java web application which utilizes Open source libraries with LGPLv2.0 and v2.1 libraries without any modification. For distributing this software commercially, what legal ...
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1answer
61 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
1k 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
159 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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2answers
48 views

Proper License for Ritchie Stock Exchange, Proprietary Algorithms, and Algorithmic Trading?

A little context for this question: I'm building an alternative stock exchange (ATS) named "Ritchie". It is based on "The Open Source Way," and I'm trying to decide on the proper license. http://www....
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1answer
70 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
45 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
205 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
603 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
51 views

Do we have to choose a GPL License when we use MIT, GPLv.2+, LGPL2.1, LGPL3, Apache 2.0 licensed libraries in our distribution?

Our question more specific would be if the whole work has to be published (a must) under GPLv.3 or LGPLv.3 as the used gettext.inc, gettext.php, streams.php are GNU GPLv.2 or later and Smarty is ...
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1answer
55 views

How to use non LGPL resources inside a library that contains LGPL codes?

I have found a library that contains Arphic (1999) Public Licensed (says the author) image resources, generated by converting a Arphic (1999) Public Licensed Font into SVG and modifying the SVG code ...
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1answer
33 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
163 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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2answers
344 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
166 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
694 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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1answer
16 views

How does the LGPL apply to the Web and define distribution?

If I use the lgpl licensed javascript library, do I have to release a closed source web application that is using it? I feel like it's unnecessary, as long as I don't modify the source of the library. ...
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1answer
20 views

Do (L)GPLv2 licenses allow the distribution of derived binaries using Apple's XCode?

To create executables to run on iOS platforms, the intended way is to use Apple's XCode to build them. XCode is available for free to run on MacOS devices. But, assuming that Apple's terms allow the ...
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1answer
38 views

Using the Qt framework strictly for a personal project I want in my GitHub portfolio

I am using the Qt framework for a personal project of mine. Not intended to be sold or used by anyone else. Just a cool project that I want to have in my portfolio. What is required of me under the ...
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1answer
189 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
59 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
397 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
314 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
166 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
294 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
429 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
1k 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 ...
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1answer
2k 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 ...