GNU通用公共授權條款（英語： GNU General Public License ，縮寫GNU GPL 或 GPL），是被廣泛使用的自由軟件許可證，给予了終端用戶運行、學習、共享和修改軟件的自由。. 許可證最初由自由軟件基金會的理查德·斯托曼为GNU項目所撰寫，並授予計算機程序的用户自由軟件定義（The Free Software Definition）的權利。. GPL是一個 Copyleft 許可證，這意味著衍生作品只能以相同

The GNU Lesser General Public License (LGPL) is a free-software license published by the Free Software Foundation (FSF). The license allows developers and companies to use and integrate a software component released under the LGPL into their own (even proprietary) software without being required by the terms of a strong copyleft license to release the source code of their own components.

There are multiple variants of the GNU GPL, each with different requirements. While the "GPLv2 or any later version" clause is considered by FSF as the most common form of licensing GPLv2 software, Toybox developer Rob Landley described it as a lifeboat clause. [c] Software projects licensed with the optional "or later" clause include the GNU Project , while a prominent example without the clause is the Linux kernel. The GNU General Public License is a free, copyleft license for software and other kinds of works. The licenses for most software and other practical works are designed to take away your freedom to share and change the works.

Gplv2 copyleft

May 6, 2010 1.1 Kernel is licensed GPL v2 only; 1.2 GPL/LGPL license version (v3) Copyleft and the GNU General Public License: A Comprehensive Jan 24, 2012 For most of the 2000s, copyleft licenses (in particular the GPLv2) were the most popular choice for new open source projects. In the last few Nov 5, 2015 As a self-styled "copyleft" license, the GPLv2 is designed to ensure that any software licensed pursuant to its terms is freely modifiable and 20 hours ago If someone legally takes over the FSF, and publishes GPL 4 which is a BSD style license, then copyleft goes away for a lot of GPL software. GNU General Public License version 2. SPDX short identifier: GPL-2.0. Further resources on GPLv2. OSI Approved License Logo. GNU GENERAL PUBLIC Designates Copyleft Licenses.

What is the scope of derviative works under the GPLv2? I have often called this the $64,000 question of open source licensing.

GNU GPLv2 The GNU GPL is the most widely used free software license and has a strong copyleft requirement. When distributing derived works, the source code of the work must be made available under the same license. There are multiple variants of the GNU GPL, each with different requirements.

Copyleft advocates have always contemplated that some companies will choose to ship proprietary software on the same device as the GPL'd works. Indeed, GPLv2 foresaw this possibility and permits that “mere aggregation” — as long as compliance is achieved for the GPLv2-covered works included on the device. In contrast, a GPLv2 licensee, under the doctrine of implied patent license, is free to practice any patent claims held by the licensor that cover “reasonably contemplated uses” of the GPL’d code, which may very well include creation and distribution of modified works since the GPL’s terms, under which the patented code is distributed, expressly permits such activity.

Mar 22, 2017 The GNU General Public License is a free, copyleft open source license for software and other kinds of works. This is in contrast to permissive

However, GPLv2 § 3 must go a bit further.

GNU GPLv2 The GNU GPL is the most widely used free software license and has a strong copyleft requirement. When distributing derived works, the source code of the work must be made available under the same license. There are multiple variants of the GNU GPL, each with different requirements. 2018-12-15 However, if a party uses that program without complying with the GPLv2, then Company can assert both copyright infringement claims against the non-GPLv2-compliant party and infringement of the patent, because the implied patent license only extends to use of the software in accordance with the GPLv2. GPLv2’s “work based on the Program” definition made use of a legal term of art, “derivative work”, which is peculiar to USA copyright law. 2 GPLv2 always sought to cover all rights governed by relevant copyright law, in the USA and elsewhere 2017-11-27 So in short: if you fear that the FSF will backtrack on the strong copyleft in any future GPL license, then you should not employ the term "or any later version" but license your software exclusively under a particular GPL version (e.g. the linux kernel does choose GPL v2 only).
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Share this: Copyleft licenses require that the original license is applied to the modified work, to ensure that the software GNU General Public License, version 2.0 (GPLv2). There are also open-source licenses without copyleft: they simply don't care the possibility that your software gets used in a closed appliance, use GPL v2. A “copyleft provision” in a software license means: If you redistribute the software The largest difference between the GPLv2 and BSD licenses is: GPLv2 is not Apr 30, 2020 GPL v2 § 1: „… copy and distribute verbatim copies of the Program's source Modifications are to be licensed under the GPL v2 („copyleft“). Nov 14, 2014 As has historically been the case, the free software, copyleft GPLv2 is the most popular license choice according to Black Duck.

First released in mid-1991, GPLv2 transformed thinking around the world about the viability of copyright commons, and gave birth to a range of “share alike” licensing institutions, not only for software but for all forms of digital culture.
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Despite efforts by copyleft advocates to explain this in GPLv2 itself and in other documents, there are evidently some people who still believe that GPLv2 allows charging for services but not for selling copies of software and/or that the GPL requires downloads to be gratis.

Once the undisputed most popular, only GPLv2 stayed steady at busybox. 1.1.3/1.10.4/. 1.17.3. GPLv2 http://www.busybox.net/license.html mksquashfs. 4.1.