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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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0answers
3 views

License for open source application based on Qt

I'm developing an free and open source application that uses Qt. I'm not making any changes to Qt library itself. I wanted to know: On what license can I publish my application sources. On what ...
2
votes
1answer
11 views

Does using a GPL v2.1 as a resource in studying count as derivative work?

I came across source code for an AI that plays some classic video games. It's licensed as: GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, I understand the Gnu license pretty well and if I were to ...
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1answer
18 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 ...
4
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0answers
48 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) ...
1
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1answer
49 views

How can Qt charge for a commercial license without getting copyright assignments from contributors?

As I understand, if the copyright holder accepts external contributions under GPL / LGPL, they are no longer the sole copyright owner and cannot charge for a commercial license. Or does this only ...
2
votes
2answers
47 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.
1
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1answer
30 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 ...
2
votes
1answer
40 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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0answers
19 views

Is deleting a file under MPL 1.1 is a license violation? [duplicate]

I have an open source code repository under MPL 1.1/GPL 2.0/LGPL 2.1. My question: is deleting a file is a license violation ?
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1answer
40 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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votes
1answer
29 views

Can I use LGPL 2.1 licensed java jar without disclosing my complete source code

I am working on a proprietary java application. I want to use a java library licensed LGPL 2.1. One condition of the license is to disclose source code. What does it exactly mean? Do I need to ...
0
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1answer
39 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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2answers
62 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 ...
2
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0answers
59 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
votes
1answer
122 views

Using Qt Designer to create UI design for closed source application

Am I allowed to create a closed-source application using the LGPL licensing scheme for Qt if I use Qt Designer to generate its user interface? I originally thought this was possible until I saw this ...
4
votes
1answer
198 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. ...
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2answers
208 views

Can I use Stack Overflow code by creating a LGPL library of code snippets first and then linking to that library?

All code posted on Stack Overflow is currently licensed under CC-BY-SA. If the code crosses the "threshold of originality", you have to distribute your whole project under a copyleft license. This may ...
6
votes
2answers
616 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 ...
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1answer
409 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 ...
0
votes
1answer
58 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 ...
2
votes
1answer
34 views

About using GNU GPL 2, GNU GPL 3 and LGPL software in a commercial product

I build a commercial product, which uses some third party products licensed under GNU GPL 2, GNU GPL 3 and LGPL. I do not modify myself the source code of these third party products and I do not ...
0
votes
1answer
29 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
397 views

LGPL 2.1. Attributions required?

I'm about to release my LGPL 2.1 licensed java/maven project where I have a dependency to a 3rd party jar also licensed under LGPL 2.1. I've also copied and modified some of the 3rd party project into ...
3
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1answer
78 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 ...
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0answers
56 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. ...
2
votes
1answer
62 views

Licensing LGPL software commercially

We have a mobile app software and we distribute it with LGPL v3. It uses other 2 components licensed under LGPL-v3 and MIT. For our own code, we are have the full ownership (i.e. nobody else have made ...
3
votes
1answer
47 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 ...
6
votes
1answer
386 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 ...
0
votes
2answers
184 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 ...
3
votes
1answer
320 views

What is the difference between LGPLv2.1 and LGPLv3?

Below text is cited from https://www1.qt.io/faq/#_Toc_3_6 LGPLv3 is the current version of the GNU Lesser General Public License. LGPLv2.1 is an older version and not recommended by the Free ...
4
votes
1answer
644 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 ...
1
vote
1answer
53 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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2answers
599 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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0answers
39 views

Which of Qt license files must we include with our open source (MIT) software?

We are using the LGPL version of Qt 4.8 for some components of our MIT-licensed desktop software (https://appleseedhq.net/). In my Qt 4.8.7 distribution, I see at least the following license files: ....
4
votes
1answer
710 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 ...
0
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1answer
141 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 ...
3
votes
2answers
123 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"...
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1answer
48 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?
2
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1answer
55 views

What are my license options for releasing code I derived from code that was released under LGPL v2.1?

If I take some code that was released under LGPL v2.1 and make modifications to it, what are my options for releasing that derived work again as open source? I guess, one option would obviously be to ...
8
votes
1answer
204 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 ...
3
votes
1answer
71 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 ...
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vote
1answer
122 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....
2
votes
1answer
83 views

Query on distributing Application under Apache 2.0 license which dynamically links with LGPL2.1 shared libraries

I'm writing some C++ code which I might eventually like to release under an Apache v2.0 license. I'm looking to build the application linking to some of the LGPL v2.1-licensed shared libraries from ...
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1answer
430 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 ...
6
votes
1answer
130 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 ...
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0answers
95 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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1answer
100 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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0answers
86 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 ...
4
votes
1answer
46 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 ...
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1answer
221 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. ...