Upstream source http://invisible-island.net/byacc/byacc.html

Berkeley Yacc is in the public domain; changes made to it by the current
maintainer are likewise unrestricted.  That applies to most of the files.
A few files (currently those related to autoconf scripting) have other
licenses as noted here.

Current byacc upstream maintainer: Thomas Dickey <dickey@invisible-island.net>

Public domain notice and no warranty:
-------------------------------------------------------------------------------
    Berkeley Yacc is an LALR(1) parser generator.  Berkeley Yacc has been made
as compatible as possible with AT&T Yacc.  Berkeley Yacc can accept any input
specification that conforms to the AT&T Yacc documentation.  Specifications
that take advantage of undocumented features of AT&T Yacc will probably be
rejected.

    Berkeley Yacc is distributed with no warranty whatever.  The code
is certain to contain errors.  Neither the author nor any contributor
takes responsibility for any consequences of its use.

    Berkeley Yacc is in the public domain.  The data structures and algorithms
used in Berkeley Yacc are all either taken from documents available to the
general public or are inventions of the author.  Anyone may freely distribute
source or binary forms of Berkeley Yacc whether unchanged or modified.
Distributers may charge whatever fees they can obtain for Berkeley Yacc.
Programs generated by Berkeley Yacc may be distributed freely.

    Please report bugs to

			robert.corbett@eng.Sun.COM

Include a small example if possible.  Please include the banner string from
skeleton.c with the bug report.  Do not expect rapid responses.
-------------------------------------------------------------------------------

Files: aclocal.m4
Licence: other-BSD
Copyright:  2004-2019,2020 by Thomas E. Dickey
    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the
    "Software"), to deal in the Software without restriction, including
    without limitation the rights to use, copy, modify, merge, publish,
    distribute, distribute with modifications, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:
    
    The above copyright notice and this permission notice shall be included
    in all copies or portions of the Software.
    
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
    IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
    DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
    OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
    THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    
    Except as contained in this notice, the name(s) of the above copyright
    holders shall not be used in advertising or otherwise to promote the
    sale, use or other dealings in this Software without prior written
    authorization.

Files: install-sh
Copyright:  1994 X Consortium
Licence: other-BSD
    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to
    deal in the Software without restriction, including without limitation the
    rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
    sell copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
    X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
    AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
    TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

    Except as contained in this notice, the name of the X Consortium shall not
    be used in advertising or otherwise to promote the sale, use or other deal-
    ings in this Software without prior written authorization from the X Consor-
    tium.

    FSF changes to this file are in the public domain.

    Calling this script install-sh is preferred over install.sh, to prevent
    `make' implicit rules from creating a file called install from it
    when there is no Makefile.

    This script is compatible with the BSD install script, but was written
    from scratch.  It can only install one file at a time, a restriction
    shared with many OS's install programs.

Files: debian/*
Copyright:  2012 Thomas E. Dickey
Licence: other-BSD
    Permission to use, copy, modify, and distribute this software and its
    documentation for any purpose and without fee is hereby granted,
    provided that the above copyright notice appear in all copies and that
    both that copyright notice and this permission notice appear in
    supporting documentation, and that the name of the above listed
    copyright holder(s) not be used in advertising or publicity pertaining
    to distribution of the software without specific, written prior
    permission.

    THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM ALL WARRANTIES WITH REGARD
    TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE
    LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

On Debian systems, the complete text of the GNU General
Public License can be found in '/usr/share/common-licenses/GPL-2'
