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.
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src/third_party/win32-compat/win32/getopt.*
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src/third_party/win32-compat/win32/mktemp.*
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src/third_party/win32-compat/win32/winerror_to_errno.h
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