Build system: use SPDX identifiers

[urcu.git] / LICENSE

Userspace RCU library licensing
Mathieu Desnoyers
September 3, 2012


* LGPLv2.1

The library part is distributed under LGPLv2.1 or later. See
LICENSES/LGPL-2.1-or-later.txt for license details. Refer to the individual
file headers for details.

LGPL-compatible source code can statically use the library header using :

#define _LGPL_SOURCE
#include <urcu.h>

Dynamic-only linking with the LGPL library is used if _LGPL_SOURCE is not
defined. It permits relinking with newer versions of the library, which is
required by the LGPL license.

See lgpl-relicensing.md for details.


* Boehm-GC (MIT-style) license :

xchg() primitive has been rewritten from scratch starting from atomic_ops 1.2
which has a MIT-style license that is intended to allow use in both free and
proprietary software:

	http://www.hpl.hp.com/research/linux/atomic_ops/LICENSING.txt
	http://www.hpl.hp.com/personal/Hans_Boehm/gc/gc_source/

This license applies to:

uatomic/gcc.h
uatomic/unknown.h
uatomic/generic.h
uatomic/sparc64.h
uatomic/arm.h
uatomic/ppc.h
uatomic/x86.h
uatomic.h

MIT/X11 (BSD like) license apply to:

compiler.h
arch/s390.h
uatomic/alpha.h
uatomic/mips.h
uatomic/nios2.h
uatomic/s390.h
system.h


* GPLv2

Library test code is distributed under the GPLv2 license. See
LICENSES/GPL-2.0-only.txt for license details. See headers of individual files
under tests/ for details.