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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23 views

Cygwin in a commercial application (LGPL with exceptions for linking)

I want to make a videogame using a proprietary license. It would utilize the SDL library and POSIX. From my understanding, every modern platform uses POSIX except for Windows. To fix this, when ...
4
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1answer
167 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 ...
4
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1answer
63 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
35 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 (...
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2answers
37 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 ...
2
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2answers
74 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 ...
2
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1answer
135 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 ...
3
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1answer
27 views

Is it possible to license that header file to LGPL but implementation to proprietary license

Suppose someone is writing a proprietary software that uses a shared or dynamic library that is licensed under the GNU LGPL license. If he wants to change the LGPL library code, he make some functions ...
4
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2answers
36 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 ...
2
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1answer
49 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 ...
3
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2answers
61 views

Is LGPL OK for mostly header only library?

I'm writing a library which is a template-rich C++ library. All templated functions and classes are defined inside headers. It also has some non-templated functions, which are implemented inside ...
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0answers
19 views

Source and jar without dependencies under MIT, runnable jar with dependencies under GPL

Image I would like to develop MIT (or Apache 2.0)-licensed software using an LGPL library. As far as I understand this is allowed as long as I'm distributing the library in a seperate jar file and ...
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1answer
40 views

LGPL Software Rental

Can proprietary software which makes use of LGPLv3 libraries be leased to users for a period of time in exchange for a fee? If the user modifies the program to allow relinking with altered LGPL DLLs, ...
3
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0answers
30 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 ...
6
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2answers
80 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 ...
3
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0answers
53 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
49 views

If I use an LGPL library do I have to release the full source code of my project?

I'm creating software which includes (PHP library for generating PDF documents on-the-fly) to export invoices which falls under GNU Lesser General Public License, the open source product is called ...
-1
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1answer
21 views

Can i use an lgpl v3 licensed library in disclosed source code game project

I use an library called Toemsel.Network which makes networking job more easier, but its licensed under lgpl v3 which says make your source code open. I use dynamic linking for using library. ...
2
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1answer
65 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 ...
3
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1answer
47 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 ...
2
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1answer
55 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 ...
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0answers
12 views

Does an LGPL licensed library (assembly) prevent its usage in a .NET 5.0 single file deployment?

.NET 5.0 introduces single file deployments, https://docs.microsoft.com/en-us/dotnet/core/deploying/single-file. The LGPL, https://choosealicense.com/licenses/lgpl-3.0/, section 4 requires that ...
3
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1answer
71 views

How does the APGLv3 applies on a project which links only through an iFrame?

Suppose you build a point of sale software using PHP code. You used another standalone server for the report viewing such as the Jasper Reports Server. These two links only via library built in PHP ...
2
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1answer
82 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
34 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 ...
4
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1answer
58 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. ...
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1answer
53 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 ...
5
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1answer
57 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 ...
3
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1answer
28 views

Does removing some class files from a third-party jar file mean it becomes a derivative work? [duplicate]

We use several LGPL third-party library JARs in our product, some of which contain classes with security concerns, which are identified by the OWASP scan during build. We do not require the classes ...
2
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2answers
70 views

Can code licensed under AGPL also be (re)licensed under LGPL by its contributor?

I have a puzzling question: Somebody contributed to a AGPL licensed project (he is not the owner). Now this code could also be applied to a different project licensed under LGPL. Could the author of ...
2
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2answers
75 views

Using LGPL for shared library, and ASL for scripts?

My software is a compiled Python module, which provides commands when loaded into the interpreter. In the project, the source code and accompanying Python scripts are using the Apache Software License ...
1
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1answer
31 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 ...
2
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1answer
42 views

Using pre-built library wimlib with GLP/LGPL dual licensing in closed source commercial product

Need help with a **complicated GPL/LGPL Dual Licensing issue**. We need to read the contents of a .ESD file which which is nothing but a LZMA compressed .WIM file. I am planning to use the wimlib ...
0
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0answers
15 views

Selling copy of GPL v3 app under another license [duplicate]

I want to create a library, that can be used for free in any open-source project, so I want to publish it under terms of GNU GPL v3. But, also I want to sell it, so it could be used in proprietary ...
5
votes
1answer
99 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 ...
1
vote
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 ...
1
vote
1answer
47 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 ...
0
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1answer
55 views

Can different parts of a project be under different licenses?

I have a personal project (in C++) I've been working on that I'm thinking of putting on Git hub. I'm finding the question of picking an appropriate license quite daunting. Part of the project is an ...
3
votes
1answer
71 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
votes
1answer
50 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 ...
2
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1answer
70 views

Clarification on using FFmpeg in an open source app

Can someone please clarify the legality of bundling and using the full version of FFmpeg (with included libx264 and libx265 and other gpl codecs) in an open source app. I don't want to modify ...
3
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2answers
157 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 ...
11
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2answers
812 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
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2answers
5k 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. ...
4
votes
1answer
263 views

An LGPL library inside a proprietary Android app

Let's consider a proprietary Android app which is using an LGPL library. LGPL requires that the user could be able to replace the library with a modified version. For languages like C, LGPL suggests ...
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0answers
105 views

License of QtCore in Qt 5.6: LGPL v2.1 or LGPL v3?

In the headers of QtCore 5.6 it says: -- clip -- ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License ...
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0answers
13 views

LGPL v 2.1 + Linking Over Controlled Interface

I use (nrjavaserial) library in a java application. This library is released under the LGPL v 2.1 + Linking Over Controlled Interface license. I have two questions: If the implementation falls ...
1
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1answer
576 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 ...
4
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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 ...
2
votes
2answers
387 views

What permissions does LGPL-3.0 grant if the licensed work links against a proprietary library?

According to the FSF "The Lesser GPL permits use of the library in proprietary program". Is this permission granted in cases where an LGPL-3.0 licensed work links against a proprietary library? Both ...

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