HarfBuzz

Optionally used in Qt GUI. Configure with -system-harfbuzz to force the use of the system library, or -no-harfbuzz to disable the use of HarfBuzz entirely.

The sources can be found in qt-everywhere-src-5.15.2/qtbase/src/3rdparty/harfbuzz.

 Copyright © 2008,2010  Nokia Corporation and/or its subsidiary(-ies)
 Copyright © 2006  Behdad Esfahbod
 Copyright © 2005  David Turner
 Copyright © 2004,2007,2008,2009,2010  Red Hat, Inc.
 Copyright © 1998-2004  David Turner and Werner Lemberg

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.