HarfBuzz

Optionally used in Qt GUI. Configure with -system-harfbuzz or -qt-harfbuzz to avoid.

The sources can be found in tqtc-qt5/qtbase/src/3rdparty/harfbuzz.

  Copyright (c) 1992, 1993
      The Regents of the University of California. All rights reserved.

  Copyright (c) 2011 The FreeBSD Foundation
  All rights reserved.
  Portions of this software were developed by David Chisnall
  under sponsorship from the FreeBSD Foundation.

MIT License.

  HarfBuzz was previously licensed under different licenses.  This was
  changed in January 2008.  If you need to relicense your old copies,
  consult the announcement of the license change on the internet.
  Other than that, each copy of HarfBuzz is licensed under the COPYING
  file included with it.  The actual license follows:


  Permission is hereby granted, without written agreement and without
  license or royalty fees, to use, copy, modify, and distribute this
  software and its documentation for any purpose, provided that the
  above copyright notice and the following two paragraphs appear in
  all copies of this software.

  IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  DAMAGE.

  THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.