SPEC® tried to track down all software license references within all files in SPEC CPU 2017. Many modules were found with BSD (or similar) licenses. Copyrights for such modules must be acknowledged in the documentation if they are shipped in binary form. Separate acknowledgment is not required if they ship as source code (which is how SPEC CPU ships).
Nevertheless, having identified these modules, it seems only courteous to acknowledge them -- even if not legally required. See the document SPEC CPU 2017 Licenses, and this appendix for 526.blender_r (separated because there are so many).
The copyright holders below have contributed code under BSD (or similar) licenses, and their contributions to 526.blender_r are gratefully acknowledged.
"Advanced Micro Devices, Inc. http://bulletphysics.org"
4 files in 526.blender_r/src/blender/extern/bullet2/src/
"Aladdin Enterprises."
526.blender_r/src/blender/intern/cycles/util/util_md5.cpp 526.blender_r/src/blender/intern/cycles/util/util_md5.h
"Blender Foundation."
526.blender_r/src/blender/intern/cycles/subd/subd_mesh.cpp 526.blender_r/src/blender/intern/cycles/subd/subd_mesh.h
"Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium", "Professor Benoit Macq", "David Janssens", "Yannick Verschueren", "Francois-Olivier Devaux and Antonin Descampe", "Herve Drolon, FreeImage Team"
12 files under 526.blender_r/src/blender/extern/libopenjpeg/
"Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium", "Professor Benoit Macq", "David Janssens", "Yannick Verschueren", "Francois-Olivier Devaux and Antonin Descampe", "Herve Drolon, FreeImage Team", "Parvatha Elangovan"
526.blender_r/src/blender/extern/libopenjpeg/j2k.h
"Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium", "Professor Benoit Macq", "David Janssens", "Yannick Verschueren", "Francois-Olivier Devaux and Antonin Descampe", "Herve Drolon, FreeImage Team", "Parvatha Elangovan", "Kaori Hagihara"
526.blender_r/src/blender/extern/libopenjpeg/openjpeg.h
"Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium", "Professor Benoit Macq", "Francois-Olivier Devaux and Antonin Descampe", "Herve Drolon, FreeImage Team"
526.blender_r/src/blender/extern/libopenjpeg/raw.h
"Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium", "Professor Benoit Macq", "Yannick Verschueren", "Herve Drolon, FreeImage Team"
526.blender_r/src/blender/extern/libopenjpeg/jp2.h 526.blender_r/src/blender/extern/libopenjpeg/jpt.h
"Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium", "Professor Benoit Macq", "Yannick Verschueren", "Kaori Hagihara"
526.blender_r/src/blender/extern/libopenjpeg/cidx_manager.h 526.blender_r/src/blender/extern/libopenjpeg/indexbox_manager.h
"Erwin Coumans http://bullet.googlecode.com"
526.blender_r/src/blender/extern/bullet2/src/LinearMath/btScalar.h
"Erwin Coumans http://bulletphysics.com"
4 files in 526.blender_r/src/blender/extern/bullet2/src/
"Erwin Coumans http://bulletphysics.org"
60 files in 526.blender_r/src/blender/extern/bullet2/src/
"Erwin Coumans http://continuousphysics.com/Bullet/", "Simon Hobbs"
526.blender_r/src/blender/extern/bullet2/src/BulletCollision/BroadphaseCollision/btAxisSweep3.h
"Erwin Coumans http://continuousphysics.com/Bullet/"
526.blender_r/src/blender/intern/rigidbody/rb_bullet_api.cpp
4 files in 526.blender_r/src/blender/source/gameengine/Physics/
84 files in 526.blender_r/src/blender/extern/bullet2/src/
"Frances Y. Kuo and Stephen Joe"
526.blender_r/src/blender/intern/cycles/render/sobol.cpp
"Francisco Leon Najera. C.C. 80087371. email: projectileman@yahoo.com"
11 files in 526.blender_r/src/blender/extern/bullet2/src/BulletCollision/Gimpact
"Gino van den Bergen Erwin Coumans http://continuousphysics.com/Bullet/"
13 files in 526.blender_r/src/blender/extern/bullet2/src/LinearMath/
"Google Inc. http://code.google.com/p/ceres-solver/"
256 files in 526.blender_r/src/blender/extern/libmv/third_party/ceres
"Google Inc."
526.blender_r/src/blender/source/blender/imbuf/intern/dds/FlipDXT.cpp
21 files in 526.blender_r/src/blender/extern/gtest/
8 files in 526.blender_r/src/blender/extern/libmv/third_party/gflags/
29 files in 526.blender_r/src/blender/extern/libmv/third_party/glog/src/
"Herve Drolon, FreeImage Team"
4 files in 526.blender_r/src/blender/extern/libopenjpeg/
"Herve Drolon, FreeImage Team", "Callum Lerwick <seg at haxxed.com>"
526.blender_r/src/blender/extern/libopenjpeg/opj_malloc.h
"Industrial Light & Magic, a division of Lucas Digital Ltd. LLC."
526.blender_r/src/blender/intern/cycles/util/util_transform.cpp
"Intel Corporation."
19 files in 526.blender_r/src/blender/extern/Eigen3/Eigen/src/
"Jason Evans <jasone@canonware.com>.", "Mozilla Foundation.", "Facebook, Inc."
526.blender_r/src/blender/intern/atomic/atomic_ops.h
"Lukas Hosek and Alexander Wilkie"
526.blender_r/src/blender/intern/cycles/render/sky_model.cpp 526.blender_r/src/blender/intern/cycles/render/sky_model.h 526.blender_r/src/blender/intern/cycles/render/sky_model_data.h
"Makoto Matsumoto and Takuji Nishimura,"
526.blender_r/src/blender/source/blender/python/mathutils/mathutils_noise.c 526.blender_r/src/blender/intern/smoke/intern/MERSENNETWISTER.h
"Makoto Matsumoto and Takuji Nishimura,", "Richard J. Wagner"
526.blender_r/src/blender/intern/smoke/intern/MERSENNETWISTER.h
"Mikko Mononen memon@inside.org"
11 files in 526.blender_r/src/blender/extern/recastnavigation/
"Milan Ikits <milan ikits[]ieee org>", "Marcelo E. Magallon <mmagallo[]debian org>", "Lev Povalahev"
5 files in 526.blender_r/src/blender/extern/glew-es 4 files in 526.blender_r/src/blender/extern/glew/
"Morten S. Mikkelsen"
526.blender_r/src/blender/intern/mikktspace/mikktspace.c 526.blender_r/src/blender/intern/mikktspace/mikktspace.h
"Ole Kniemeyer, MAXON, www.maxon.net"
526.blender_r/src/blender/extern/bullet2/src/LinearMath/btConvexHullComputer.h
"Ricardo Padrela"
526.blender_r/src/blender/extern/bullet2/src/BulletCollision/NarrowPhaseCollision/btGjkEpaPenetrationDepthSolver.h
"Robert Penner"
526.blender_r/src/blender/source/blender/blenlib/BLI_easing.h 526.blender_r/src/blender/source/blender/blenlib/intern/easing.c
"Russell L. Smith. Email: russ@q12.org Web: www.q12.org Bullet Continuous Collision Detection and Physics Library", "Erwin Coumans http://continuousphysics.com/Bullet/"
526.blender_r/src/blender/extern/bullet2/src/BulletCollision/CollisionDispatch/btBoxBoxDetector.h
"Russell L. Smith. Email: russ@q12.org Web: www.q12.org"
526.blender_r/src/blender/extern/bullet2/src/BulletDynamics/MLCPSolvers/btDantzigLCP.h
"Sony Computer Entertainment Inc."
3 files in 526.blender_r/src/blender/extern/bullet2/src/BulletDynamics/ConstraintSolver/
"Sony Pictures Imageworks Inc., et al. Modifications", "Blender Foundation."
28 files in 526.blender_r/src/blender/intern/cycles/kernel/
"Sony Pictures Imageworks Inc., et al."
526.blender_r/src/blender/intern/cycles/kernel/shaders/stdosl.h 526.blender_r/src/blender/intern/opencolorio/ocio_impl_glsl.cc
"Stan Melax http://www.melax.com/"
526.blender_r/src/blender/extern/bullet2/src/LinearMath/btConvexHull.h
"Starbreeze Studios"
526.blender_r/src/blender/extern/bullet2/src/BulletDynamics/ConstraintSolver/btConeTwistConstraint.h
"Stephen Thompson", "Erwin Coumans"
526.blender_r/src/blender/extern/bullet2/src/BulletDynamics/Featherstone/btMultiBody.h
"Timothy A. Davis,"
526.blender_r/src/blender/extern/colamd/Include/colamd.h
"the University of Florida."
526.blender_r/src/blender/extern/Eigen3/Eigen/src/OrderingMethods/Eigen_Colamd.h