Is LGPL free for commercial use?

You can use and distribute LGPL libraries on your website and use them in combination with commercial code. The only big restriction is that you must keep the library open source, including any modifications you make to it, and allow your users to obtain the source, licence and copyright information for the library.

What is meant by an LGPL software license?

LGPL (GNU Lesser General Public License) is a free software license published by the Free Software Foundation. The LGPL provides a more permissive alternative for the strictly copyleft GPL.

What is the difference between GPL and LGPL licenses?

The main difference between the GPL and the LGPL is that the latter allows the work to be linked with (in the case of a library, “used by”) a non-(L)GPLed program, regardless of whether it is licensed under a license of GPL family or other licenses.

Is LGPL license copyleft?

The LGPL License was created as a kind of “bridge” between the strong copyleft requirements of the GPLs and comparatively lax — and increasingly popular — permissive licenses, such as the MIT License. As a copyleft license, LGPL requires users to release the source code of any changes to the original software.

Is LGPL a viral license?

Now you may think you already do this, but looking at the licenses, I see little to no difference between GPL and LGPL unless I really study it (or already know the difference) LGPL is not viral like GPL.

Can I sell software under LGPL?

Short answer is yes, you can sell your application under any license you like.

Does LGPL allow linking?

No, by default a LGPL program cannot link to a proprietary library. LGPL is basically GPL + an exception allowing proprietary programs to link to it.

Is LGPL open source?

LGPL allows you to use and distribute the open source software with your application without releasing the source code for your application. GPL requires you to release the source code of your application if you choose to use and distribute the GPL licensed open source software with your application.

Can I use LGPL in closed source?

Applying LGPL to a library ensures that the library itself and any modified versions of it will remain open source. But it can be used by closed source software.

Do I need a Qt license?

Qt for Device Creation is a product available only under a commercial license. This allows you to, for example, control your device’s user experience, and build proprietary functionality on top of Qt and to lock down your device.

Can I use GPL for commercial purpose?

Software under the GPL may be run for all purposes, including commercial purposes and even as a tool for creating proprietary software, such as when using GPL-licensed compilers. Users or companies who distribute GPL-licensed works (e.g. software), may charge a fee for copies or give them free of charge.

What version of LGPL do I need to license my software?

Derivative works of LGPL v 2.1 code must be licensed under the same (or, if allowed by the licensor, a later version of LGPL) — or GPL v2 or later. Derivative works of LGPL v3 code must be licensed under the LGPL v3 — or GPL v3 or later.

What is the Lesser General Public License (GPL)?

This license, the Lesser General Public License, applies to some specially designated software packages–typically libraries–of the Free Software Foundation and other authors who decide to use it.

Is LGPL a weak copyleft license?

However, LGPL is slightly different from other weak copyleft licenses, like the Mozilla Public License or Eclipse Public License, due to its special safe harbor for dynamic linking integration. The LGPL is primarily applied to libraries.

How to license ffmpeg under LGPL?

When combining them with FFmpeg, FFmpeg needs to be licensed as GPL as well by passing –enable-gpl to configure. The following libraries are under LGPL version 3: When combining them with FFmpeg, use the configure option –enable-version3 to upgrade FFmpeg to the LGPL v3.