/usr/share/doc/sbcl-doc/copyright is in sbcl-doc 2:1.3.14-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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SBCL is derived from CMU CL, which was released into the public
domain, subject only to the BSD-style "free, but credit must be given
and copyright notices must be retained" licenses in the LOOP macro
(from MIT and Symbolics) and in the PCL implementation of CLOS (from
Xerox).
After CMU CL was was released into the public domain, it was
maintained by volunteers, who continued the tradition of releasing
their work into the public domain.
All changes to SBCL since the fork from CMU CL have been released into
the public domain in jurisdictions where this is possible, or under
the FreeBSD licence where not.
Exceptions are:
- src/runtime/ld-script.alpha-linux: GPL v2 (from binutils package)
Thus, there are no known obstacles to copying, using, and modifying
SBCL freely, as long as copyright notices of MIT, Symbolics, Xerox and
Gerd Moellmann are retained.
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