= Ccache copyright and license

== Overall license

The license for ccache as a whole is as follows:

----
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 3 of the License, or (at your option) any later
version.

This program 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 General Public License for more details.

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

The full license text can be found in GPL-3.0.txt and at
https://www.gnu.org/licenses/gpl-3.0.html.


== Copyright and authors

Ccache is a collective work with contributions from many people, listed in
AUTHORS.adoc and at https://ccache.dev/credits.html. Subsequent additions by
contributing authors are implicitly licensed to the public under the same terms
(GNU GPL version 3 or later), but the contributing authors retain copyrights on
their portions of the work.

The copyright for ccache as a whole is as follows:

----
Copyright (C) 2002-2007 Andrew Tridgell
Copyright (C) 2009-2025 Joel Rosdahl and other contributors
----


== Files derived from other sources

The ccache distribution contain some files from other sources and some have
been modified for use in ccache. These files all carry attribution notices, and
may qualify as ``separate and independent works in themselves'' for purposes of
the GPL: that is, if separated from the ccache sources, they may be usable
under less restrictive terms.


=== src/third_party/blake3/blake3/*

This is a subset of https://github.com/BLAKE3-team/BLAKE3[BLAKE3] 1.6.1 with the
following license:

----
This work is released into the public domain with CC0 1.0. Alternatively, it is
licensed under the Apache License 2.0.

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   Copyright 2019 Jack O'Connor and Samuel Neves

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=== src/third_party/cpp-httplib/httplib.h

cpp-httplib - A C++11 cross-platform HTTP/HTTPS library. Copied from cpp-httplib
v0.19.0 downloaded from https://github.com/yhirose/cpp-httplib[cpp-httplib]. The
library has the following license:

----
The MIT License (MIT)

Copyright (c) 2025 yhirose

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
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----


=== src/third_party/cxxurl/cxxurl/url.*

CxxUrl - A simple C++ URL class. Copied from CxxUrl v0.3 downloaded from
<https://github.com/chmike/CxxUrl>. It has the following license text:

----
The MIT License (MIT)

Copyright (c) 2015 Christophe Meessen

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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SOFTWARE.
----


=== src/third_party/fmt/fmt/*.h and src/third_party/fmt/fmt/format.cc

This is a subset of https://fmt.dev[fmt] 11.1.4 with the following license:

----
Formatting library for C++

Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors

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
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--- Optional exception to the license ---

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=== src/third_party/nonstd-span/nonstd/span.hpp

This is the single header version of
https://github.com/martinmoene/span-lite[span-lite] 0.11.0 with the
following license:

----
Copyright (c) 2018-2021 Martin Moene

Boost Software License - Version 1.0 - August 17th, 2003

Permission is hereby granted, free of charge, to any person or organization
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=== src/third_party/tl-expected/tl/expected.hpp

This is https://github.com/TartanLlama/expected[TartanLlama expected] 1.1.0 with
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----
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=== src/third_party/win32-compat/win32/getopt.*

This implementation of `getopt_long()` for Win32 was taken from
https://www.codeproject.com/Articles/157001/Full-getopt-Port-for-Unicode-and-Multibyte-Microso
and is licensed under the LGPL.

The full license text can be found in LGPL-3.0.txt and at
https://www.gnu.org/licenses/lgpl-3.0.html.


=== src/third_party/win32-compat/win32/mktemp.*

This implementation of `mkstemp()` for Win32 was adapted from
<https://github.com/openbsd/src/blob/99b791d14c0f1858d87a0c33b55880fb9b00be66/lib/libc/stdio/mktemp.c>
and has the following license text:

----
Copyright (c) 1996-1998, 2008 Theo de Raadt
Copyright (c) 1997, 2008-2009 Todd C. Miller

Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, 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.
----


=== src/third_party/win32-compat/win32/winerror_to_errno.h

The implementation of `winerror_to_errno()` was adapted from
<https://github.com/python/cpython/blob/1a79785e3e8fea80bcf6a800b45a04e06c787480/PC/errmap.h>
and has the following license text:

----
PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2

1. This LICENSE AGREEMENT is between the Python Software Foundation
("PSF"), and the Individual or Organization ("Licensee") accessing and
otherwise using this software ("Python") in source or binary form and
its associated documentation.

2. Subject to the terms and conditions of this License Agreement, PSF hereby
grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
analyze, test, perform and/or display publicly, prepare derivative works,
distribute, and otherwise use Python alone or in any derivative version,
provided, however, that PSF's License Agreement and PSF's notice of copyright,
i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Python Software Foundation;
All Rights Reserved" are retained in Python alone or in any derivative version
prepared by Licensee.

3. In the event Licensee prepares a derivative work that is based on
or incorporates Python or any part thereof, and wants to make
the derivative work available to others as provided herein, then
Licensee hereby agrees to include in any such work a brief summary of
the changes made to Python.

4. PSF is making Python available to Licensee on an "AS IS"
basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
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DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
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5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

6. This License Agreement will automatically terminate upon a material
breach of its terms and conditions.

7. Nothing in this License Agreement shall be deemed to create any
relationship of agency, partnership, or joint venture between PSF and
Licensee.  This License Agreement does not grant permission to use PSF
trademarks or trade name in a trademark sense to endorse or promote
products or services of Licensee, or any third party.

8. By copying, installing or otherwise using Python, Licensee
agrees to be bound by the terms and conditions of this License
Agreement.
----
