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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142 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
211 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
346 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
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 ...
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1answer
51 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
77 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
43 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
10 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 ...
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100 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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214 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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174 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
285 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
464 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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66 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
1k 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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2answers
422 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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1answer
1k 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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2answers
272 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 ...
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1answer
56 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
100 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
172 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
330 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
41 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 ...
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1answer
62 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
157 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
295 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 ...
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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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10 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 ...
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0answers
46 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
22 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
213 views

LGPL license for shotwell, VLC media player

Just curious to know, why are the programs shotwell and VLC media player released under LGPL? Maybe because that they are written just not for Linux, but for other proprietary operating systems too? ...
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1answer
123 views

Can I obtain a source code for RGSS1/RGSS2, assuming it contains LGPL part?

RGSS1/RGSS2 is a game engine for RPG Maker XP and RPG Maker VX. The binary of them consist of two files: Game.exe ... It's about 100KB and seems to be a mere loader. RGSS104J.dll ... It's about 800KB ...
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1answer
58 views

What open-source license should I use for my tool?

I have developed a tool that uses another tool to convert a file from format#1 to format#2. And currently, my tool works only if it is given the file in format#2 as input, and so, it depends on that ...
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1answer
62 views

Free Pascal and LGPL

I want to modify this program and compile it using Free Pascal compiler. The above program is licensed under GNU General Public License version 3. I know little about Free Pascal, and reading the FAQ ...
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1answer
441 views

Can I change my Qt project license?

I have non-commercial Qt license, but I need a static compilation option because as I know, my program needs many DLL files and I want to have the possibility of running my program on another machine ...
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2answers
64 views

What happens when I use LGPL Qt 5 toolkit to link statically for a closed source (proprietary) application?

I come from a country "ALGERIA" where nobody buys a software license even the government, except fore rare cases where the government institution is very sensitive, other governmental institutions ...
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1answer
54 views

choose between open-source or close source

if hypothetically I have developed special software, and I only want author recognition for it (leaving money aside) can i choose to distribute my creation as open source without other people usurping ...

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