Lesser General Public License

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39
votes
3answers
46k views

Can I use an LGPL-licenced library in my commercial app?

I want to use an LGPL-licensed library in my app for Microsoft's app marketplace. Is that OK?
30
votes
7answers
1k views

Choosing a licence for open source projects

I've done some open source projects, and I plan to do more in the future. So far, I've released all my code under GPL, but I've read a few articles which claim GPL is too restrictive for any code to ...
17
votes
1answer
4k views

Downsides of GNU LGPL v3 vs. GNU LGPL v2.1?

Firstly, I realize that this is a programming Q&A site, and not a place for legal advice.... Just trying to get a basic idea of what the downsides to using an LGPLv3 library might be. What ...
16
votes
5answers
7k views

Does the LGPL allow me to do this?

I am planning to develop a commercial software using a LGPL software. In the LGPL software that I am using some functions in a class are not fully implemented. I want to modify the LGPL code so that ...
16
votes
5answers
6k views

Is there a modified LGPL license that allows static linking?

LGPL requires that it if a program uses LGPL-ed library, users must be able to re-link the program with a different version of the library: ... d) Do one of the following: 0) Convey the ...
15
votes
2answers
4k views

What constitutes “distributing” for LGPL v3

I am considering basing some new software on a LGPL web application. I want to utilize this new software for creating one website for my employer, and we do not intend to sell or distribute the ...
14
votes
1answer
11k views

LGPL 2.1 vs LGPL 3.0 Advantages and Disadvantages

From what I've read, LGPL 3.0 allows you to use the license together with other licenses, more permissive about that(Not even sure about that). From ...
14
votes
2answers
3k views

What does “GPL with classpath exception” mean in practice?

Oracle seems to license all their Java-related open source code under the GPL with a classpath exception. From what I understand, this seems to allow to combine these libraries with your own code into ...
13
votes
3answers
13k views

What exactly do I need to do if I use a LGPL licenced library?

I have read this questions and answers, but I still don't understand what exactly do I need to do if I dynamically link with a library that uses a LGLP licence (the SDL library in my case). If I ...
13
votes
11answers
1k views

Difference between free and open software? [duplicate]

Possible Duplicate: Open Source but not Free Software (or vice versa) I recently was at talk were Stallman was the keynote speaker, and he stated he hated the term open software, because it ...
12
votes
8answers
2k views

I created a program based on an LGPL project, and I'm not allowed to publish the source code

I thought LGPL was a permissive license, just like MIT, BSD or Apache. But today I read, that only linking to LGPL (libraries etc) is allowed from closed-source code - other than that, it's copyleft - ...
12
votes
3answers
12k views

Can I use Apache Software License, Version 2.0 and GNU LGPL 3 licence plugins in my commercial web application?

I have two plug-ins. One has the GNU LGPL 3 license and the other has the Apache Software License, Version 2.0. Can I use them in my commercial app? And if yes, what precautions should I take?
12
votes
2answers
3k views

How does using a LGPL gem affect my MIT licensed application?

I am developing an open source ruby application under the MIT license. I am using this license because I don't want to place any restrictions on the users of the application. Also I can actually ...
9
votes
4answers
4k views

Why is jQuery released under MIT and not LGPL?

Why is jQuery released under MIT and not LGPL? What are the benefits of using MIT compared to LGPL for a framework?
9
votes
1answer
4k views

Mozilla Public License (MPL 2.0) vs Lesser GNU General Public License (LGPL 3.0)

I would like to release a software library written in a class-based, object-oriented programming language (Java) on a web-based source code hosting service, that allows forks of the project to be ...
8
votes
2answers
164 views

Why does the LGPL require combined works to include a copy of the GPL?

I was reading through the LGPL license and found a requirement that I was previously unaware of. Section 4 (Combined Works) states: You may convey a Combined Work [...] if you also do each of the ...
7
votes
4answers
3k views

Can a user relicense LGPL as GPL or GPL as AGPL?

The LGPL (we'll just assume version 3 for all in discussion for ease), is a less restrictive version of the GPL, likewise, the AGPL, is a more restrictive version of the GPL, but is it possible to use ...
7
votes
5answers
5k views

Can I use GPL, LGPL, MPL licensed packages with my application and make it closed source?

I saw a company is using BusyBox and also using Gpl + Lgpl + Mpl packages on it, and then they have there own application running on it. Their application is a closed source package. You buy the ...
7
votes
1answer
6k views

the decisive difference between LGPL and AGPL

What is the decisive difference between LGPL(v3) and AGPL(v3) ? Both can be used in commercial production, both can also be packed within a payed product. As long as I do not change the source code ...
7
votes
2answers
342 views

Using an LGPL licensed library that may or may not include GPL licensed code from an MIT licensed library

I have read this question on SO, but it doesn't appear to answer my question fully. I maintian a library which is licensed under the MIT License. In my MIT licensed library, I dynamically link ...
7
votes
2answers
519 views

Writing proprietary and possibly closed source software while avoiding license infractions

I am starting a software project that I want to have the option to keep it proprietary. However, since I generally use a Linux environment, I want to know: How do people write proprietary software in ...
7
votes
1answer
417 views

What is the reason for section 1 of LGPL and what is the implication for section 9.

Why was section 1 added to LGPLv3? My understanding of section 3&4 is, one can convey the combined work under any license and with no requirements from GPLv3 (besides those explicitly stated as ...
6
votes
4answers
1k views

Is it allowed to embed an LGPL command-line tool?

I want to sell a closed-application that depends upon a certain command line tool. Am I allowed to distribute my software including this command line tool? For example, as a separate binary ...
6
votes
5answers
299 views

Can I use open source libraries in trialware?

I have written a small Java program which i'd like to distribute on my website. I have used a few external librarys which declare following licences: Apache License (2.0), LGPL and one API doesn't ...
6
votes
5answers
318 views

Does (/could) an LGPL-based license exist without clause 4d?

I've started writing a framework in C (you may have heard of it: Raphters). Someone contacted me to ask whether I could re-license it because it would be useful in embedded products, but clause 4d ...
6
votes
1answer
771 views

LGPL, .lib, .dll, and linking

I am trying to build a project which uses an unmodified copy of libconfig (http://www.hyperrealm.com/libconfig/). libconfig is LGPL, but I don't want to open source any of my code. By my ...
6
votes
3answers
2k views

When porting code, must I follow the original license?

I'm an iOS developer and I've found myself porting code from several other languages recently for various projects and it got me thinking about code licensing. When porting code, is that considered ...
5
votes
2answers
746 views

Developer name in the copyright notice of files contributed to open source project?

I am developing a small application which I want to make open source. Currently only my work is on the application, and so in all the files I have put up a copyright notice in my name. Now when I ...
5
votes
1answer
801 views

Looking for a popular, well known example of closed-source software which uses LGPL code, and says so [closed]

For advocacy purposes, I'm looking for a good example of some popular/widely-known closed-source and generally paid-for software application/package which uses dynamically linked LGPL-licensed ...
5
votes
2answers
894 views

Software bundle containing LGPL libraries as Java Fat-Jar Archive

At work, we're deploying a software bundle of a Java application (written by us) which has lots of external dependencies, most of them being LGPL and BSD-licensed third-party-libraries distributes as ...
4
votes
1answer
136 views

Do I need to include a copy of the GPL / LGPL to every copy of my program?

Is it necessary to include the GPL / LGPL license text to every distributed copy of my program? Or can I just put a link in the About-dialog?
4
votes
3answers
233 views

How long do I have to provide the source code for a LGPL-library?

In case I would dynamically link to a LGPL-licensed library (in this case Qt) in a commercial application: Which way do I have to provide the library's source code? Is a link to the project homepage ...
4
votes
4answers
553 views

Releasing a project under GPL v2 or later without the source code of libraries

I wrote a system in Java that I want to release under the terms of GPL v2 or later. I've used Apache Maven to deal with all the dependencies of the system, so I don't have the source code of any of ...
4
votes
1answer
78 views

License change of original source from Apache 2.0 to LGPL

About a year or so ago, I forked a project licensed under Apache 2.0 and made extensive changes and additions to the code, a good portion of which I contributed back freely to the community. ...
4
votes
2answers
113 views

If I create a desktop application using Tkinter, PyGTK or PyGame does my app have to be open source?

I intent to start learning desktop gui programming, so I've been looking to Python and it's Tkinter, PyGTK and PyGame. But I want to make proprietary software, so I'm concerned because of the licences ...
4
votes
1answer
86 views

Does providing object files satisfy LGPL relink clause?

From this question on SO, I read that: Proprietary Source code + LGPL Source code statically linked: Either you must release both parts as LGPL. Or provide everything that allow the user to ...
4
votes
1answer
141 views

What precisely do I/my company need to do “make available/publish” source code changes and satisfy GPL/LGPL

This seems like a basic question, but I have not found a definitive source. I need to modify the source for an LGPL application for my employer to plug a security hole. Longer term we will upgrade to ...
3
votes
3answers
343 views

How do I avoid GPL violations?

When I'm releasing a program, I like to license it under the GPL or LGPL. I also want to stay compliant with that license. I'm not good at reading legal documents, and the GPL3 is about 10 pages long. ...
3
votes
4answers
930 views

Is a program linked against an LGPL library in linux still under GPL?

If I were to write say, an embeded linux video server, how much of the code do I have to offer to someone who requests the source? Do I have to offer the code that directly links against the GPL ...
3
votes
1answer
467 views

Am I permitted to use an LGPL library without releasing the source to the rest of my application, if I dynamically reference the library?

I am a bit confused as to what I am/am not allowed to do with a LGPL Library that I intend on using in a small scale commercial C++ Application that I am developing. My current understanding, although ...
3
votes
1answer
102 views

Forking a GitHub repo and including code from pull requests within a LGPL license?

There is a project hosted at GitHub which is no longer maintained that I want to use for my project. However it has some bugfixes contained within pull requests from other users, and I would like to ...
3
votes
3answers
125 views

Can I include an LGPLv2.0-licensed XSLT stylesheet into my Apache v2.0-license nodejs package?

I am creating an open source tool which leverages some XSLT stylesheets in order to do its work, which is transforming XML to Java code. One of the stylesheets that I want to use is licensed under ...
3
votes
1answer
268 views

Is there any copyleft (GPL-like) license with both the Affero and Lesser modifications?

Looking for a license that covers public network service, like AGPLv3, but like LGPL isn't infectious. Basically I wrote some useful helper functions I want to allow to be used in any work, including ...
3
votes
1answer
706 views

Is it OK to use the MIT license for a project that uses Qt?

I built a Qt application. Am I allowed to LICENSE it under the MIT license? Qt is a cross-platform application and UI framework for developers using C++ or QML, a CSS & JavaScript like ...
3
votes
2answers
1k views

LGPLv3 in closed embedded environment

I'm thinking of using a LGPLv3 library in a closed source commercial program running in a closed embedded environment. According to what I know from LGPLv3 licensing, I can use it as long as the ...
3
votes
2answers
1k views

Should I include multiply license header notice in dual license software?

Is it necessarily if a software released under both of LGPL3 && GPL3 terms have to include both license header notice top of each file? Or just put GPL header notice? or simply put LGPL3 ...
3
votes
2answers
1k views

use of LGPL libraries in closed source android software

I'm investigating the legal issues of using LGPL native libraries in a closed source Android software. As for now, my research on the subject shows that using LGPL libraries in closed source software ...
3
votes
1answer
313 views

Dual-licensing LGPL 2.1 and LGPL 3

I maintain a software, a small PHP library, that is released under the LGPL version 3 license (LGPLv3). Someone wants to use the library in their software which has the GPL version 2 license. This ...
3
votes
2answers
204 views

Is it considered “conveying” if I share modified LGPL v3 code on GitHub?

It is critical to know what constitutes "conveying" under LGPL v3. I am considering creating some software based on LGPL v3. The software will be used to run a web application. Now I wonder whether ...
3
votes
2answers
458 views

Is distributing patches in compliance with the GPL?

I'm designing a distro and some of the software packages included are maintained in such a way that my source repository doesn't actually include the source code, but they are included as an ...