Qt 5.6 | GNU Lesser General Public License (LGPL)

Qt 5.6.0 Reference Documentation

# GNU Lesser General Public License (LGPL)

Qt is available under the GNU Lesser General Public License version 3 and the GNU Lesser General Public License version 2.1.

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## LGPL version 2.1

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        To apply these terms, attach the following notices to the library.  It is
      safest to attach them to the start of each source file to most effectively
      convey the exclusion of warranty; and each file should have at least the
      "copyright" line and a pointer to where the full notice is found.

          <one line to give the library's name and a brief idea of what it does.>
          Copyright (C) <year>  <name of author>

          This library is free software; you can redistribute it and/or
          modify it under the terms of the GNU Lesser General Public
          License as published by the Free Software Foundation; either
          version 2.1 of the License, or (at your option) any later version.

          This library is distributed in the hope that it will be useful,
          but WITHOUT ANY WARRANTY; without even the implied warranty of
          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
          Lesser General Public License for more details.

          You should have received a copy of the GNU Lesser General Public
          License along with this library; if not, write to the Free Software
          Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

      Also add information on how to contact you by electronic and paper mail.

      You should also get your employer (if you work as a programmer) or your
      school, if any, to sign a "copyright disclaimer" for the library, if
      necessary.  Here is a sample; alter the names:

        Yoyodyne, Inc., hereby disclaims all copyright interest in the
        library `Frob' (a library for tweaking knobs) written by James Random Hacker.

        <signature of Ty Coon>, 1 April 1990
        Ty Coon, President of Vice

      That's all there is to it!

## The Qt Company Qt LGPL Exception version 1.1

As a special exception to the GNU Lesser General Public License version 2.1, the object code form of a "work that uses the Library" may incorporate material from a header file that is part of the Library. You may distribute such object code under terms of your choice, provided that the incorporated material (i) does not exceed more than 5% of the total size of the Library; and (ii) is limited to numerical parameters, data structure layouts, accessors, macros, inline functions and templates.