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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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
82 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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35 views

LGPL 3 vs Code-Signing: gmp, mpir,

Is there a way, to have the, from my perspective all-important, libraries such as gmp, mpir, mpfr be used in a license that fully supports code-signing? My perspective is that of a curious researcher. ...
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2answers
76 views

Meaning of Plus symbol in GPLv2+ / LGPLv2.1+

I was checking the license compatibility of some open source software and I found out that sometimes software is released with a weird license like GPLv2+ / LGPLv2.1+. I'm not sure about the "...
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20 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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26 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 ...
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133 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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15 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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132 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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252 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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217 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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379 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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69 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
799 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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334 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
76 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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127 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
176 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
29 views

What filename for a LGPL license for github projects?

When using a LGPL License in a github open-source project, you have the possibility to choose a license in github yourself. When you edit a license file github shows you a button with the text "...
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1answer
490 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
55 views

Do we have to choose the GNU LGPL v2.1 license libraries for our distribution?

Our situation - LGPLv2.1 Libraries = LGPL for whole work? Our distribution Package contains libraries which are licensed GNU LGPLv2.1 jquery.form - dual licensed GNU-LGPL-2.1+ - MIT, * ...
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1answer
39 views

Can I use a (modified) LGPL-2.1 library in my MIT-licensed library?

I am developing a Modbus library for use on microcontrollers. Internally, I am using an (apparently) heavily-modified version of libmodbus (slightly-modified from the version that comes with ...
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1answer
41 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, ...
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1answer
74 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
114 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
172 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
24 views

(L)GPL software on devices provided for internal use

As far as I understand, there can be issues with (L)GPL-licensed software in code-signing contexts where modified code is not allowed to run. Now, suppose an organization (for example, a company or a ...
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1answer
739 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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0answers
16 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
25 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
66 views

Can I distribute my program under LGPL if it has a password identification mechanism?

So I'm making an application which uses the python module PySide2 which is under LGPL. What I'm planning is to sell my program and make it non-distributable by making a unique password-identification ...
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1answer
30 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. ...
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1answer
220 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
85 views

Which GPL is suitable for the VS Code extension?

I wrote an extension for Visual Studio Code. VS Code source code is available under MIT license. But VS Code binaries are licensed under Microsoft product license. Under what GPL (latest versions) can ...
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1answer
154 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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0answers
12 views

javascript and LGPL

Javascript File A imports Javascript File B( B is LGPL License) Is linking of A and B is dynamic linking or static linking? is *.js file a library or just source file? Should A be disclosed? Or is it ...
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1answer
45 views

Is the avahi-client license incompatible with its dependency on DBus?

Avahi, including the C client library, is licensed under the LGPL. On my system, (and I believe everywhere) libavahi-client.so.3 links to libdbus-1.so.3. DBus is licensed under a dual license, GPL OR ...
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1answer
61 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
65 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
554 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
105 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
62 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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