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Can I use Qt for commercial software?
Qt for Application Development is dual-licensed under commercial and open source licenses. The commercial Qt license gives you the full rights to create and distribute software on your own terms without any open source license obligations.
What software is released under LGPL license?
The most common are MIT, BSD, MPL, Apache, and any software declared in the public domain.
Do I need a Qt commercial license?
No. As long as you can comply with the (L)GPL requirements of the Qt libraries, then you do not need to purchase a “commercial license” from the Qt Company.
Can I sell software under LGPL?
Short answer is yes, you can sell your application under any license you like.
Is Qt GPL or LGPL?
LGPL has been chosen as the primary open-source license for Qt, because it provides the following four degrees of freedom that stem from the foundations of the GPL: Freedom to run the program for any purpose. Freedom to study how the program works & adapt it to specific needs.
Is QT GPL or LGPL?
What is GPL software license how is it different from LGPL software license?
GPL stands GNU’s General Public License that ensures the freedom to use, alter, distribute the software. It was written by Richard Stallman of Free Software Foundation for GNU Project. LGPL is Lesser General Public License that offers lesser rights to a work than the GPL.
Is LGPL license copyleft?
And like the others, it’s a copyleft license. But unlike the GPLs and AGPL, the LGPL is what’s known as a “weak copyleft” license. This type of license straddles the line between strong copyleft licenses (such as the GPLs) and permissive licenses like the MIT or BSD licenses.
What are my obligations when using Qt under the LGPL?
What are my obligations when using Qt under the LGPL? Firstly, you have to note that all Qt open source modules are not available under LGPLv3 license. Some modules are available under GPLv3 for open source usage, and e.g. 3rd party components such as Chromium web engine are provided under LGPLv2. 1.
Is Qt still LGPL?
most Qt modules are LGPL, but some are GPL. Sometimes you have a choice between multiple open source licenses, e.g. the LGPLv3 vs GPLv2 in the cited case. If you want to develop closed software, the LGPL is likely the appropriate choice.
Which license is appropriate for the development of Qt applications?
Qt licensed under the GNU Lesser General Public License (LGPL) version 3 is appropriate for the development of Qt applications provided you can comply with the terms and conditions of the GNU LGPL version 3 (or GNU GPL version 3). Im confused, because some modules of Qt ( QtCharts and QSql for example) state that the module is:
Are all Qt modules licensed under the LGPL?
Most Qt modules are licensed under the LGPL, but some are available under only the GPL. The Qt Modules page lists the (currently) six modules in Qt 5 that are not available under the LGPL. Qt Charts is one such module not available under the LGPL.
Should I use the LGPL or the commercial licensing option?
In many cases, the LGPL is a viable solution to use, but it is important that the freedoms of the LGPL are not restricted from the user of an application or device using an LGPL library such as Qt, which may be difficult to achieve in some use cases. For such cases the commercial licensing option is typically a better choice.
How to distribute the source code under the LGPL?
Quote from LGPL version 2.1: If distribution of object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place satisfies the requirement to distribute the source code, even though third parties are not compelled to copy the source along with the object code.