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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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 ...
3
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1answer
33 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 ...
3
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1answer
353 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 ...
3
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2answers
498 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 ...
3
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1answer
158 views

Does using libraries under LGPL in my product limit my choice on how to license it?

I am developing a product that links to a number of LGPL (or compatible) licensed libraries. The product itself is a creator tool for intellectual property work of its users. The LGPL libraries are ...
3
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1answer
150 views

Legal consideration before development of a FFMPEG filter using named pipe for I/O to any forked program and

I would like to develop a ffmpeg filter to have an easier and better integration of the ffmpeg functionalities in case of complex command lines. Imagine an ffmpeg command line in which you can ...
3
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1answer
480 views

Do I have to include attribution and license files for an LGPL-licensed library together with a “work that uses the library”?

I am making use of a library licensed under LGPLv2 in a proprietarily licensed closed-source project. Specifically, I am dynamically linking my commercial C++ program to a C++ library that is itself ...
3
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1answer
769 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 ...
3
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1answer
32 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 ...
3
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1answer
316 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 ...
3
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1answer
220 views

Does a (L)GPL3 device still need to provide it's original service after modification?

Let's assume I am building an embedded linux device using amongst other things (L)GPLv3 software. The device is sold to non-business users so the anti tivoization clause applies. I want to be ...
3
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2answers
509 views

If some software states it is BSD-licensed, how can it be distributing itself with GPL/LGPL components?

For a specific example relating to my question, I offer VisIt. Per the licensing information for VisIt, it is stated that it is BSD-licensed. But, looking over the libraries used in VisIt, it can be ...
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2answers
2k views

GPL, LGPL or MPL for open source app with closed source Pro flavour

I have had a fairly popular Android business app on Google Play a while now. It is available as a free version and a version with features targeted to bigger businesses. I am currently in the process ...
3
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1answer
111 views

glibc is LGPL - shouldn't virtually every Linux C project include attributions for it?

One of the requirements of the LGPL v2.1 license is: You must give prominent notice with each copy of the work that the Library is used in it and that the Library and its use are covered by this ...
3
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1answer
332 views

Does an application linking to an unmodified LGPL-3 library need to be debugger-friendly?

I currently work on a proprietary, closed-source software suite, which is distributed to customers as part of a larger package (including various hardware and services). The software suite uses LGPL-...
3
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1answer
1k views

Is it possible to make closed source code while using the following libraries?

I am not good at Licensing issues. So my question - If my program is using these libraries (only linking like -ludev, -lblkid, -lcrypto, -lssl, -fopenmp) - libudev (LGPL version 2.1 of the License, ...
2
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2answers
158 views

GNU Lesser GPL with additional requirement for customer reference

I am planning to release a software under GNU Lesser GPL (not sure yet if v2 or v3 should be used). But I would also like to state a requirement that whenever my software is used commercially the ...
2
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1answer
724 views

Do I need to provide build/install instructions for LGPL-2.1 or AGPL-3.0 licensed libraries?

We have a Java project which uses a couple of libraries licensed by LGPL-2.1 and uses MongoDB which is licensed by AGPL-3.0 as its database. We don't modify any of them. Our legal team claims we ...
2
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2answers
130 views

Working around GPL Restrictions

I am currently looking at ways to circumvent the limitations imposed by LGPL licences. The software I am planning to use is LGPL and is mostly used in the UI side. The idea which I am thinking is to ...
2
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2answers
414 views

Can I use a library that is dual licensed GPL + LGPL as if it was only LGPL?

PaGMO 2 includes both GPL and LGPL in their copyright notices: Copyright 2017-2018 PaGMO development team This file is part of the PaGMO library. The PaGMO library is free software; you can ...
2
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2answers
86 views

Contracting Around LGPL

A client of mine wants to static link its proprietary commercial work to a library that is licensed under LGPL that is sold by VMime in France. VMime's website purports to explain that the purchaser ...
2
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1answer
109 views

Forking a project with conflicting licenses

I’m forced to work with software that has been given incompatible licenses by its authors. They have created an original API that they’ve licensed under the GNU GPL, but then they implement that API ...
2
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1answer
155 views

If a library is LGPL licensed, can the creator impose additional usage limits?

Example: A programmer produces a library. They release that library under the LGPL and provide full source code. The programmer wants to monetize their product as well. Rather than offering a "pro" ...
2
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1answer
73 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 ...
2
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2answers
83 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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1answer
239 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
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1answer
2k 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 ...
2
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1answer
35 views

Is it possible/necessary to add Classpath Exception to LGPL?

I see people comparing the GPL with a Classpath exception to the standard LGPL. Does this mean that LGPL already has the Classpath exception or some language already similar enough to it? If not, can ...
2
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1answer
40 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 ...
2
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2answers
161 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 ...
2
votes
1answer
140 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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2answers
139 views

Opensource license for github Python project which uses lgpl libraries

I'm about to make my first Python repo on github public and it needs a license. It imports four libraries, without modifying them, it merely makes use of their functions. These libraries are in ...
2
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1answer
131 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 ...
2
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1answer
629 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
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1answer
93 views

What does LGPL point 3 mean?

The LGPL point 3 says: 3. You may opt to apply the terms of the ordinary GNU General Public License instead of this License to a given copy of the Library. To do this, you must alter ...
2
votes
1answer
56 views

Complex mix of licenses for stand-alone installer, and the softwares it installs

I'm writing an installer for some softwares, and wish to make the installer stand-alone, i.e. everything baked into a single executable. One of the softwares that are installed has GPL 3, built from ...
2
votes
1answer
59 views

Can we modify LGPLv3 license based ERP and change the license to private?

My client wants to use an opensource ERP named Odoo. However modifications like name, UI and languages support would be required. Also the license need to be private onwards If it is permissible under ...
2
votes
1answer
89 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 ...
2
votes
1answer
138 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 ...
2
votes
1answer
51 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 ...
2
votes
1answer
110 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 ...
2
votes
1answer
113 views

How does an LGPLv3 dependency affect an application when sharing the dependent application with others?

Suppose a developer named Peter has an application named AppMIT licensed MIT that has a dependancy on Tony's library named LibLGPL licensed LGPLv3. Please help me understand if the cases below are ...
2
votes
1answer
83 views

LGPL v3.0 and how it relates to wkhtmltopdf in a SAAS scenario: what are our obligations?

We would like to use this library https://github.com/SebastiaanKlippert/go-wkhtmltopdf to generate PDFs from HTML. That library is licensed under MIT. It is really nothing more than a wrapper for the ...
2
votes
1answer
238 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 ...
2
votes
1answer
237 views

VLC and VLCJ licenses

I'm confused about the licenses GPL and LGPL. I see that VLC is released under LGPL license since sept 2011: https://www.videolan.org/press/lgpl.html. But VLCJ, which is a Java wrapper on top of VLC, ...
2
votes
1answer
170 views

Does inbound=outbound apply to GPL-family without a CLA?

The traditional expectation for contributions to a free software project are "inbound=outbound" [1] [2]. That is, if the project is under license X, contributions are made under license X. Does this ...
2
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1answer
99 views

Are the terms of LGPL 3.0 already covered by GPL 3.0 aggregate definition

Are full terms of LGPLv3.0 already covered by GPLv3.0 section 5 under the terms of an "aggregate"? A compilation of a covered work with other separate and independent works, which are not by ...
2
votes
2answers
87 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 ...
2
votes
2answers
126 views

What can a patent troll win by suing an open-source foundation e.g. GTK foundation?

Do open-source foundations have oodles and piles of cash lying around for patent trolls to scoop up? Are open-source softwares licensed under the GPL not immune to patent trolls since there is no ...
2
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1answer
97 views

Call MS-PL library in LGPL code

I am currently developing a small desktop application. I am looking for a license that guarantee : That the code cannot be sold, and must be freely distributed. That modifications of the code cannot ...