diff --git a/build_files/build_environment/cmake/download.cmake b/build_files/build_environment/cmake/download.cmake
index d3a4d767c08..b92073636f5 100644
--- a/build_files/build_environment/cmake/download.cmake
+++ b/build_files/build_environment/cmake/download.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 function(download_source dep)
   set(TARGET_FILE ${${dep}_FILE})
   set(TARGET_HASH_TYPE ${${dep}_HASH_TYPE})
diff --git a/build_files/build_environment/patches/cmake/modules/FindBlosc.cmake b/build_files/build_environment/patches/cmake/modules/FindBlosc.cmake
index 015d211b818..8c4e65c9322 100644
--- a/build_files/build_environment/patches/cmake/modules/FindBlosc.cmake
+++ b/build_files/build_environment/patches/cmake/modules/FindBlosc.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2016 Blender Foundation.
+
 # - Find BLOSC library
 # Find the native BLOSC includes and library
 # This module defines
@@ -11,17 +14,6 @@
 # also defined, but not for general use are
 #  BLOSC_LIBRARY, where to find the BLOSC library.
 
-#=============================================================================
-# Copyright 2016 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-
 # If BLOSC_ROOT_DIR was defined in the environment, use it.
 IF(NOT BLOSC_ROOT_DIR AND NOT $ENV{BLOSC_ROOT_DIR} STREQUAL "")
   SET(BLOSC_ROOT_DIR $ENV{BLOSC_ROOT_DIR})
diff --git a/build_files/build_environment/patches/cmake/modules/FindCppUnit.cmake b/build_files/build_environment/patches/cmake/modules/FindCppUnit.cmake
index 80cb07ece2a..a27e0719fa9 100644
--- a/build_files/build_environment/patches/cmake/modules/FindCppUnit.cmake
+++ b/build_files/build_environment/patches/cmake/modules/FindCppUnit.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2016 Blender Foundation.
+
 # - Find CPPUNIT library
 # Find the native CPPUNIT includes and library
 # This module defines
@@ -11,17 +14,6 @@
 # also defined, but not for general use are
 #  CPPUNIT_LIBRARY, where to find the CPPUNIT library.
 
-#=============================================================================
-# Copyright 2016 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-
 # If CPPUNIT_ROOT_DIR was defined in the environment, use it.
 IF(NOT CPPUNIT_ROOT_DIR AND NOT $ENV{CPPUNIT_ROOT_DIR} STREQUAL "")
   SET(CPPUNIT_ROOT_DIR $ENV{CPPUNIT_ROOT_DIR})
diff --git a/build_files/build_environment/patches/cmake/modules/FindIlmBase.cmake b/build_files/build_environment/patches/cmake/modules/FindIlmBase.cmake
index ffd70ac155c..7611ca21708 100644
--- a/build_files/build_environment/patches/cmake/modules/FindIlmBase.cmake
+++ b/build_files/build_environment/patches/cmake/modules/FindIlmBase.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: BSD-3-Clause
+
 # Module to find IlmBase
 #
 # This module will first look into the directories defined by the variables:
diff --git a/build_files/build_environment/patches/cmake/modules/FindLogC4Plus.cmake b/build_files/build_environment/patches/cmake/modules/FindLogC4Plus.cmake
index d1a021a88bb..fe08c74ec2e 100644
--- a/build_files/build_environment/patches/cmake/modules/FindLogC4Plus.cmake
+++ b/build_files/build_environment/patches/cmake/modules/FindLogC4Plus.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2016 Blender Foundation.
+
 # - Find LOGC4PLUS library
 # Find the native LOGC4PLUS includes and library
 # This module defines
@@ -11,17 +14,6 @@
 # also defined, but not for general use are
 #  LOGC4PLUS_LIBRARY, where to find the LOGC4PLUS library.
 
-#=============================================================================
-# Copyright 2016 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-
 # If LOGC4PLUS_ROOT_DIR was defined in the environment, use it.
 IF(NOT LOGC4PLUS_ROOT_DIR AND NOT $ENV{LOGC4PLUS_ROOT_DIR} STREQUAL "")
   SET(LOGC4PLUS_ROOT_DIR $ENV{LOGC4PLUS_ROOT_DIR})
diff --git a/build_files/build_environment/patches/cmake/modules/FindTBB.cmake b/build_files/build_environment/patches/cmake/modules/FindTBB.cmake
index de7db09ddb5..ad7a1a218f8 100644
--- a/build_files/build_environment/patches/cmake/modules/FindTBB.cmake
+++ b/build_files/build_environment/patches/cmake/modules/FindTBB.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2016 Blender Foundation.
+
 # - Find TBB library
 # Find the native TBB includes and library
 # This module defines
@@ -11,17 +14,6 @@
 # also defined, but not for general use are
 #  TBB_LIBRARY, where to find the TBB library.
 
-#=============================================================================
-# Copyright 2016 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-
 # If TBB_ROOT_DIR was defined in the environment, use it.
 IF(NOT TBB_ROOT_DIR AND NOT $ENV{TBB_ROOT_DIR} STREQUAL "")
   SET(TBB_ROOT_DIR $ENV{TBB_ROOT_DIR})
diff --git a/build_files/build_environment/patches/cmake/modules/SelectLibraryConfigurations.cmake b/build_files/build_environment/patches/cmake/modules/SelectLibraryConfigurations.cmake
index ba8c4fce285..010e7e3ba10 100644
--- a/build_files/build_environment/patches/cmake/modules/SelectLibraryConfigurations.cmake
+++ b/build_files/build_environment/patches/cmake/modules/SelectLibraryConfigurations.cmake
@@ -1,3 +1,8 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2009 Kitware, Inc.
+#           2009 Will Dicharry <wdicharry@stellarscience.com>
+#           2005-2009 Kitware, Inc.
+
 # select_library_configurations( basename )
 #
 # This macro takes a library base name as an argument, and will choose good
@@ -14,18 +19,6 @@
 # or the generator in use does not support configuration types, then
 # basename_LIBRARY and basename_LIBRARIES will take only the release values.
 
-#=============================================================================
-# Copyright 2009 Kitware, Inc.
-# Copyright 2009 Will Dicharry <wdicharry@stellarscience.com>
-# Copyright 2005-2009 Kitware, Inc.
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
 # (To distribute this file outside of CMake, substitute the full
 #  License text for the above reference.)
 
diff --git a/build_files/buildbot/config/blender_linux.cmake b/build_files/buildbot/config/blender_linux.cmake
index 20b4821959c..bedeeb6a690 100644
--- a/build_files/buildbot/config/blender_linux.cmake
+++ b/build_files/buildbot/config/blender_linux.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # ######## Global feature set settings ########
 
 include("${CMAKE_CURRENT_LIST_DIR}/../../cmake/config/blender_release.cmake")
diff --git a/build_files/cmake/Modules/FindAlembic.cmake b/build_files/cmake/Modules/FindAlembic.cmake
index 18214b25c8f..97a3b630150 100644
--- a/build_files/cmake/Modules/FindAlembic.cmake
+++ b/build_files/cmake/Modules/FindAlembic.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2016 Blender Foundation.
+
 # - Find Alembic library
 # Find the native Alembic includes and libraries
 # This module defines
@@ -9,13 +12,6 @@
 #  ALEMBIC_FOUND, If false, do not try to use Alembic.
 #
 
-#=============================================================================
-# Copyright 2016 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If ALEMBIC_ROOT_DIR was defined in the environment, use it.
 IF(NOT ALEMBIC_ROOT_DIR AND NOT $ENV{ALEMBIC_ROOT_DIR} STREQUAL "")
   SET(ALEMBIC_ROOT_DIR $ENV{ALEMBIC_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindAudaspace.cmake b/build_files/cmake/Modules/FindAudaspace.cmake
index d4a68461d32..82e25a20671 100644
--- a/build_files/cmake/Modules/FindAudaspace.cmake
+++ b/build_files/cmake/Modules/FindAudaspace.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2014 Blender Foundation.
+
 # - Try to find audaspace
 # Once done, this will define
 #
@@ -11,13 +14,6 @@
 #  AUDASPACE_PY_INCLUDE_DIRS - the audaspace's python binding include directories
 #  AUDASPACE_PY_LIBRARIES - link these to use audaspace's python binding
 
-#=============================================================================
-# Copyright 2014 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 IF(NOT AUDASPACE_ROOT_DIR AND NOT $ENV{AUDASPACE_ROOT_DIR} STREQUAL "")
   SET(AUDASPACE_ROOT_DIR $ENV{AUDASPACE_ROOT_DIR})
 ENDIF()
diff --git a/build_files/cmake/Modules/FindBlosc.cmake b/build_files/cmake/Modules/FindBlosc.cmake
index d1ac3002c59..5b6743aa908 100644
--- a/build_files/cmake/Modules/FindBlosc.cmake
+++ b/build_files/cmake/Modules/FindBlosc.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2018 Blender Foundation.
+
 # - Find Blosc library
 # Find the native Blosc includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  BLOSC_LIBRARY, where to find the Blosc library.
 
-#=============================================================================
-# Copyright 2018 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If BLOSC_ROOT_DIR was defined in the environment, use it.
 IF(NOT BLOSC_ROOT_DIR AND NOT $ENV{BLOSC_ROOT_DIR} STREQUAL "")
   SET(BLOSC_ROOT_DIR $ENV{BLOSC_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindBrotli.cmake b/build_files/cmake/Modules/FindBrotli.cmake
index d1e40b1966a..1eed18795e6 100644
--- a/build_files/cmake/Modules/FindBrotli.cmake
+++ b/build_files/cmake/Modules/FindBrotli.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2022 Blender Foundation.
+
 # - Find Brotli library (compression for freetype/woff2).
 # This module defines
 #  BROTLI_INCLUDE_DIRS, where to find Brotli headers, Set when
@@ -8,13 +11,6 @@
 #  BROTLI_FOUND, If false, do not try to use Brotli.
 #
 
-#=============================================================================
-# Copyright 2022 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If BROTLI_ROOT_DIR was defined in the environment, use it.
 IF(NOT BROTLI_ROOT_DIR AND NOT $ENV{BROTLI_ROOT_DIR} STREQUAL "")
   SET(BROTLI_ROOT_DIR $ENV{BROTLI_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindClang.cmake b/build_files/cmake/Modules/FindClang.cmake
index 41df6e106b2..c60f254eb2a 100644
--- a/build_files/cmake/Modules/FindClang.cmake
+++ b/build_files/cmake/Modules/FindClang.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find Clang library
 # Find the native Clang includes and library
 # This module defines
@@ -8,13 +11,6 @@
 #                        This can also be an environment variable.
 #  CLANG_FOUND, If false, do not try to use Clang.
 
-#=============================================================================
-# Copyright 2021 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If CLANG_ROOT_DIR was defined in the environment, use it.
 if(NOT CLANG_ROOT_DIR AND NOT $ENV{CLANG_ROOT_DIR} STREQUAL "")
   set(CLANG_ROOT_DIR $ENV{CLANG_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindClangTidy.cmake b/build_files/cmake/Modules/FindClangTidy.cmake
index 4cf416e67d7..51f3ddb7d47 100644
--- a/build_files/cmake/Modules/FindClangTidy.cmake
+++ b/build_files/cmake/Modules/FindClangTidy.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2020 Blender Foundation.
+
 # - Find clang-tidy executable
 #
 # Find the native clang-tidy executable
@@ -14,13 +17,6 @@
 #
 #  CLANG_TIDY_FOUND, If false, do not try to use Eigen3.
 
-#=============================================================================
-# Copyright 2020 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If CLANG_TIDY_ROOT_DIR was defined in the environment, use it.
 if(NOT CLANG_TIDY_ROOT_DIR AND NOT $ENV{CLANG_TIDY_ROOT_DIR} STREQUAL "")
   set(CLANG_TIDY_ROOT_DIR $ENV{CLANG_TIDY_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindEigen3.cmake b/build_files/cmake/Modules/FindEigen3.cmake
index 8b4399fdd07..ee692216ede 100644
--- a/build_files/cmake/Modules/FindEigen3.cmake
+++ b/build_files/cmake/Modules/FindEigen3.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2015 Blender Foundation.
+
 # - Find Eigen3 library
 # Find the native Eigen3 includes and library
 # This module defines
@@ -6,13 +9,6 @@
 #  EIGEN3_ROOT_DIR, The base directory to search for Eigen3.
 #                    This can also be an environment variable.
 #  EIGEN3_FOUND, If false, do not try to use Eigen3.
-#
-#=============================================================================
-# Copyright 2015 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
 
 # If EIGEN3_ROOT_DIR was defined in the environment, use it.
 IF(NOT EIGEN3_ROOT_DIR AND NOT $ENV{EIGEN3_ROOT_DIR} STREQUAL "")
diff --git a/build_files/cmake/Modules/FindEmbree.cmake b/build_files/cmake/Modules/FindEmbree.cmake
index e6105a885f3..bb65a24c4b5 100644
--- a/build_files/cmake/Modules/FindEmbree.cmake
+++ b/build_files/cmake/Modules/FindEmbree.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2018 Blender Foundation.
+
 # - Find Embree library
 # Find the native Embree includes and library
 # This module defines
@@ -8,13 +11,6 @@
 #                        This can also be an environment variable.
 #  EMBREEFOUND, If false, do not try to use Embree.
 
-#=============================================================================
-# Copyright 2018 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If EMBREE_ROOT_DIR was defined in the environment, use it.
 IF(NOT EMBREE_ROOT_DIR AND NOT $ENV{EMBREE_ROOT_DIR} STREQUAL "")
   SET(EMBREE_ROOT_DIR $ENV{EMBREE_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindFFmpeg.cmake b/build_files/cmake/Modules/FindFFmpeg.cmake
index 5f506a33e13..216dd2a12b6 100644
--- a/build_files/cmake/Modules/FindFFmpeg.cmake
+++ b/build_files/cmake/Modules/FindFFmpeg.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2020 Blender Foundation.
+
 # - Find FFmpeg library and includes.
 # Set FFMPEG_FIND_COMPONENTS to the canonical names of the libraries
 # before using the module.
@@ -8,12 +11,6 @@
 #                        This can also be an environment variable.
 #  FFMPEG_FOUND, If false, do not try to use FFmpeg.
 #  FFMPEG_<COMPONENT>_LIBRARY, the given individual component libraries.
-#=============================================================================
-# Copyright 2020 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
 
 # If FFMPEG_ROOT_DIR was defined in the environment, use it.
 if(NOT FFMPEG_ROOT_DIR AND NOT $ENV{FFMPEG_ROOT_DIR} STREQUAL "")
diff --git a/build_files/cmake/Modules/FindFftw3.cmake b/build_files/cmake/Modules/FindFftw3.cmake
index bce22d21e8c..492e4c84812 100644
--- a/build_files/cmake/Modules/FindFftw3.cmake
+++ b/build_files/cmake/Modules/FindFftw3.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find Fftw3 library
 # Find the native Fftw3 includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  FFTW3_LIBRARY, where to find the Fftw3 library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If FFTW3_ROOT_DIR was defined in the environment, use it.
 IF(NOT FFTW3_ROOT_DIR AND NOT $ENV{FFTW3_ROOT_DIR} STREQUAL "")
   SET(FFTW3_ROOT_DIR $ENV{FFTW3_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindGLEW.cmake b/build_files/cmake/Modules/FindGLEW.cmake
index 759065d751c..33b989ec49e 100644
--- a/build_files/cmake/Modules/FindGLEW.cmake
+++ b/build_files/cmake/Modules/FindGLEW.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2014 Blender Foundation.
+
 # - Find GLEW library
 # Find the native Glew includes and library
 # This module defines
@@ -10,13 +13,6 @@
 # also defined,
 #  GLEW_LIBRARY, where to find the Glew library.
 
-#=============================================================================
-# Copyright 2014 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If GLEW_ROOT_DIR was defined in the environment, use it.
 IF(NOT GLEW_ROOT_DIR AND NOT $ENV{GLEW_ROOT_DIR} STREQUAL "")
   SET(GLEW_ROOT_DIR $ENV{GLEW_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindGMP.cmake b/build_files/cmake/Modules/FindGMP.cmake
index 03ada24403b..8f498d7a3b5 100644
--- a/build_files/cmake/Modules/FindGMP.cmake
+++ b/build_files/cmake/Modules/FindGMP.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find GMP library
 # Find the native GMP includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  GMP_LIBRARY, where to find the GMP library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If GMP_ROOT_DIR was defined in the environment, use it.
 IF(NOT GMP_ROOT_DIR AND NOT $ENV{GMP_ROOT_DIR} STREQUAL "")
   SET(GMP_ROOT_DIR $ENV{GMP_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindHIP.cmake b/build_files/cmake/Modules/FindHIP.cmake
index c331a19eb33..9625a91d280 100644
--- a/build_files/cmake/Modules/FindHIP.cmake
+++ b/build_files/cmake/Modules/FindHIP.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2021 Blender Foundation.
+
 # - Find HIP compiler
 #
 # This module defines
@@ -6,13 +9,6 @@
 #
 #  HIP_FOUND, if the HIP toolkit is found.
 
-#=============================================================================
-# Copyright 2021 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If HIP_ROOT_DIR was defined in the environment, use it.
 if(NOT HIP_ROOT_DIR AND NOT $ENV{HIP_ROOT_DIR} STREQUAL "")
   set(HIP_ROOT_DIR $ENV{HIP_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindHaru.cmake b/build_files/cmake/Modules/FindHaru.cmake
index 7db57a6adfb..e00d6133d80 100644
--- a/build_files/cmake/Modules/FindHaru.cmake
+++ b/build_files/cmake/Modules/FindHaru.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2021 Blender Foundation.
+
 # - Find HARU library
 # Find the native Haru includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  HARU_LIBRARY, where to find the Haru library.
 
-#=============================================================================
-# Copyright 2021 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If HARU_ROOT_DIR was defined in the environment, use it.
 if(NOT HARU_ROOT_DIR AND NOT $ENV{HARU_ROOT_DIR} STREQUAL "")
   set(HARU_ROOT_DIR $ENV{HARU_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindIcuLinux.cmake b/build_files/cmake/Modules/FindIcuLinux.cmake
index 46e76fface2..4e836398eb3 100644
--- a/build_files/cmake/Modules/FindIcuLinux.cmake
+++ b/build_files/cmake/Modules/FindIcuLinux.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2012 Blender Foundation.
+
 # - Find static icu libraries
 # Find the native static icu libraries (needed for static boost_locale :/ ).
 # This module defines
@@ -9,13 +12,6 @@
 # also defined, but not for general use are
 #  ICU_LIBRARY_xxx, where to find the icu libraries.
 
-#=============================================================================
-# Copyright 2012 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If ICU_ROOT_DIR was defined in the environment, use it.
 IF(NOT ICU_ROOT_DIR AND NOT $ENV{ICU_ROOT_DIR} STREQUAL "")
   SET(ICU_ROOT_DIR $ENV{ICU_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindJack.cmake b/build_files/cmake/Modules/FindJack.cmake
index 82ce890730d..b9ed6db9c1b 100644
--- a/build_files/cmake/Modules/FindJack.cmake
+++ b/build_files/cmake/Modules/FindJack.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find JACK library
 # Find the native JACK includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  JACK_LIBRARY, where to find the JACK library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If JACK_ROOT_DIR was defined in the environment, use it.
 IF(NOT JACK_ROOT_DIR AND NOT $ENV{JACK_ROOT_DIR} STREQUAL "")
   SET(JACK_ROOT_DIR $ENV{JACK_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindJeMalloc.cmake b/build_files/cmake/Modules/FindJeMalloc.cmake
index 7473c023cc7..d552dfff50d 100644
--- a/build_files/cmake/Modules/FindJeMalloc.cmake
+++ b/build_files/cmake/Modules/FindJeMalloc.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find JeMalloc library
 # Find the native JeMalloc includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  JEMALLOC_LIBRARY, where to find the JeMalloc library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If JEMALLOC_ROOT_DIR was defined in the environment, use it.
 IF(NOT JEMALLOC_ROOT_DIR AND NOT $ENV{JEMALLOC_ROOT_DIR} STREQUAL "")
   SET(JEMALLOC_ROOT_DIR $ENV{JEMALLOC_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindLLVM.cmake b/build_files/cmake/Modules/FindLLVM.cmake
index ce4297bf54a..2bc0c06cf8f 100644
--- a/build_files/cmake/Modules/FindLLVM.cmake
+++ b/build_files/cmake/Modules/FindLLVM.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2015 Blender Foundation.
+
 # - Find LLVM library
 # Find the native LLVM includes and library
 # This module defines
@@ -10,13 +13,6 @@
 # also defined, but not for general use are
 #  LLVM_LIBRARY, where to find the LLVM library.
 
-#=============================================================================
-# Copyright 2015 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 if(LLVM_ROOT_DIR)
   if(DEFINED LLVM_VERSION)
     find_program(LLVM_CONFIG llvm-config-${LLVM_VERSION} HINTS ${LLVM_ROOT_DIR}/bin NO_CMAKE_PATH)
diff --git a/build_files/cmake/Modules/FindLZO.cmake b/build_files/cmake/Modules/FindLZO.cmake
index 8a2cce5e181..06639aa053c 100644
--- a/build_files/cmake/Modules/FindLZO.cmake
+++ b/build_files/cmake/Modules/FindLZO.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2015 Blender Foundation.
+
 # - Find LZO library
 # Find the native LZO includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  LZO_LIBRARY, where to find the LZO library.
 
-#=============================================================================
-# Copyright 2015 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If LZO_ROOT_DIR was defined in the environment, use it.
 IF(NOT LZO_ROOT_DIR AND NOT $ENV{LZO_ROOT_DIR} STREQUAL "")
   SET(LZO_ROOT_DIR $ENV{LZO_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindNanoVDB.cmake b/build_files/cmake/Modules/FindNanoVDB.cmake
index e830f770c03..f148f74b856 100644
--- a/build_files/cmake/Modules/FindNanoVDB.cmake
+++ b/build_files/cmake/Modules/FindNanoVDB.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2020 Blender Foundation.
+
 # - Find NanoVDB library
 # Find the native NanoVDB includes and library
 # This module defines
@@ -7,13 +10,6 @@
 #                     This can also be an environment variable.
 #  NANOVDB_FOUND, If false, do not try to use NanoVDB.
 
-#=============================================================================
-# Copyright 2020 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If NANOVDB_ROOT_DIR was defined in the environment, use it.
 IF(NOT NANOVDB_ROOT_DIR AND NOT $ENV{NANOVDB_ROOT_DIR} STREQUAL "")
   SET(NANOVDB_ROOT_DIR $ENV{NANOVDB_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindOSL.cmake b/build_files/cmake/Modules/FindOSL.cmake
index b21c7ad50a3..612fd9feecc 100644
--- a/build_files/cmake/Modules/FindOSL.cmake
+++ b/build_files/cmake/Modules/FindOSL.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2014 Blender Foundation.
+
 # - Find OpenShadingLanguage library
 # Find the native OpenShadingLanguage includes and library
 # This module defines
@@ -10,13 +13,6 @@
 #  OSL_FOUND, if false, do not try to use OSL.
 #  OSL_LIBRARY_VERSION_MAJOR, OSL_LIBRARY_VERSION_MINOR,  the major
 #                and minor versions of OSL library if found.
-#
-#=============================================================================
-# Copyright 2014 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
 
 # If OSL_ROOT_DIR was defined in the environment, use it.
 IF(NOT OSL_ROOT_DIR AND NOT $ENV{OSL_ROOT_DIR} STREQUAL "")
diff --git a/build_files/cmake/Modules/FindOpenCOLLADA.cmake b/build_files/cmake/Modules/FindOpenCOLLADA.cmake
index 4e83fd04f38..1b4319458c4 100644
--- a/build_files/cmake/Modules/FindOpenCOLLADA.cmake
+++ b/build_files/cmake/Modules/FindOpenCOLLADA.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find OpenCOLLADA library
 # Find the native OpenCOLLADA includes and library
 # This module defines
@@ -8,13 +11,6 @@
 #                    This can also be an environment variable.
 #  OPENCOLLADA_FOUND, If false, do not try to use OpenCOLLADA.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # note about include paths, there are 2 ways includes are set
 #
 # Where '/usr/include/opencollada' is the root dir:
diff --git a/build_files/cmake/Modules/FindOpenColorIO.cmake b/build_files/cmake/Modules/FindOpenColorIO.cmake
index 21118533ebe..f290f8d63cd 100644
--- a/build_files/cmake/Modules/FindOpenColorIO.cmake
+++ b/build_files/cmake/Modules/FindOpenColorIO.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2012 Blender Foundation.
+
 # - Find OpenColorIO library
 # Find the native OpenColorIO includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  OPENCOLORIO_LIBRARY, where to find the OpenColorIO library.
 
-#=============================================================================
-# Copyright 2012 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If OPENCOLORIO_ROOT_DIR was defined in the environment, use it.
 IF(NOT OPENCOLORIO_ROOT_DIR AND NOT $ENV{OPENCOLORIO_ROOT_DIR} STREQUAL "")
   SET(OPENCOLORIO_ROOT_DIR $ENV{OPENCOLORIO_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindOpenEXR.cmake b/build_files/cmake/Modules/FindOpenEXR.cmake
index 090f80b8df7..792bb127f99 100644
--- a/build_files/cmake/Modules/FindOpenEXR.cmake
+++ b/build_files/cmake/Modules/FindOpenEXR.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find OpenEXR library
 # Find the native OpenEXR includes and library
 # This module defines
@@ -18,13 +21,6 @@
 # also defined, but not for general use are
 #  OPENEXR_LIBRARY, where to find the OpenEXR library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If OPENEXR_ROOT_DIR was defined in the environment, use it.
 IF(NOT OPENEXR_ROOT_DIR AND NOT $ENV{OPENEXR_ROOT_DIR} STREQUAL "")
   SET(OPENEXR_ROOT_DIR $ENV{OPENEXR_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindOpenGLES.cmake b/build_files/cmake/Modules/FindOpenGLES.cmake
index d01d32b71bc..5e82984bed6 100644
--- a/build_files/cmake/Modules/FindOpenGLES.cmake
+++ b/build_files/cmake/Modules/FindOpenGLES.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2014 Blender Foundation.
+
 # - Try to find OpenGLES
 # Once done this will define
 #
@@ -10,13 +13,6 @@
 #  OPENGLES_LIBRARIES       - all libraries needed for OpenGLES
 #  OPENGLES_INCLUDES        - all includes needed for OpenGLES
 
-#=============================================================================
-# Copyright 2014 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If OPENGLES_ROOT_DIR was defined in the environment, use it.
 IF(NOT OPENGLES_ROOT_DIR AND NOT $ENV{OPENGLES_ROOT_DIR} STREQUAL "")
   SET(OPENGLES_ROOT_DIR $ENV{OPENGLES_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindOpenImageDenoise.cmake b/build_files/cmake/Modules/FindOpenImageDenoise.cmake
index 3facadbb9be..becd2f0cffe 100644
--- a/build_files/cmake/Modules/FindOpenImageDenoise.cmake
+++ b/build_files/cmake/Modules/FindOpenImageDenoise.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2019 Blender Foundation.
+
 # - Find OpenImageDenoise library
 # Find the native OpenImageDenoise includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  OPENIMAGEDENOISE_LIBRARY, where to find the OpenImageDenoise library.
 
-#=============================================================================
-# Copyright 2019 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If OPENIMAGEDENOISE_ROOT_DIR was defined in the environment, use it.
 IF(NOT OPENIMAGEDENOISE_ROOT_DIR AND NOT $ENV{OPENIMAGEDENOISE_ROOT_DIR} STREQUAL "")
   SET(OPENIMAGEDENOISE_ROOT_DIR $ENV{OPENIMAGEDENOISE_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindOpenImageIO.cmake b/build_files/cmake/Modules/FindOpenImageIO.cmake
index aac5b5ce0a8..27a56647eac 100644
--- a/build_files/cmake/Modules/FindOpenImageIO.cmake
+++ b/build_files/cmake/Modules/FindOpenImageIO.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find OpenImageIO library
 # Find the native OpenImageIO includes and library
 # This module defines
@@ -13,13 +16,6 @@
 # also defined, but not for general use are
 #  OPENIMAGEIO_LIBRARY, where to find the OpenImageIO library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If OPENIMAGEIO_ROOT_DIR was defined in the environment, use it.
 IF(NOT OPENIMAGEIO_ROOT_DIR AND NOT $ENV{OPENIMAGEIO_ROOT_DIR} STREQUAL "")
   SET(OPENIMAGEIO_ROOT_DIR $ENV{OPENIMAGEIO_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindOpenJPEG.cmake b/build_files/cmake/Modules/FindOpenJPEG.cmake
index 94c175dcb0f..6ce93d11561 100644
--- a/build_files/cmake/Modules/FindOpenJPEG.cmake
+++ b/build_files/cmake/Modules/FindOpenJPEG.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find OpenJPEG library
 # Find the native OpenJPEG includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  OPENJPEG_LIBRARY, where to find the OpenJPEG library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If OPENJPEG_ROOT_DIR was defined in the environment, use it.
 IF(NOT OPENJPEG_ROOT_DIR AND NOT $ENV{OPENJPEG_ROOT_DIR} STREQUAL "")
   SET(OPENJPEG_ROOT_DIR $ENV{OPENJPEG_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindOpenSubdiv.cmake b/build_files/cmake/Modules/FindOpenSubdiv.cmake
index ec52b9e0310..37a2cddf3de 100644
--- a/build_files/cmake/Modules/FindOpenSubdiv.cmake
+++ b/build_files/cmake/Modules/FindOpenSubdiv.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2013 Blender Foundation.
+
 # - Find OpenSubdiv library
 # Find the native OpenSubdiv includes and library
 # This module defines
@@ -8,13 +11,6 @@
 #                        This can also be an environment variable.
 #  OPENSUBDIV_FOUND, if false, do not try to use OpenSubdiv.
 
-#=============================================================================
-# Copyright 2013 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If OPENSUBDIV_ROOT_DIR was defined in the environment, use it.
 IF(NOT OPENSUBDIV_ROOT_DIR AND NOT $ENV{OPENSUBDIV_ROOT_DIR} STREQUAL "")
   SET(OPENSUBDIV_ROOT_DIR $ENV{OPENSUBDIV_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindOpenVDB.cmake b/build_files/cmake/Modules/FindOpenVDB.cmake
index 3d135d7c87b..ed5c3778596 100644
--- a/build_files/cmake/Modules/FindOpenVDB.cmake
+++ b/build_files/cmake/Modules/FindOpenVDB.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2015 Blender Foundation.
+
 # - Find OPENVDB library
 # Find the native OPENVDB includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  OPENVDB_LIBRARY, where to find the OPENVDB library.
 
-#=============================================================================
-# Copyright 2015 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If OPENVDB_ROOT_DIR was defined in the environment, use it.
 IF(NOT OPENVDB_ROOT_DIR AND NOT $ENV{OPENVDB_ROOT_DIR} STREQUAL "")
   SET(OPENVDB_ROOT_DIR $ENV{OPENVDB_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindOptiX.cmake b/build_files/cmake/Modules/FindOptiX.cmake
index c4a9e9f0181..bb671ed6495 100644
--- a/build_files/cmake/Modules/FindOptiX.cmake
+++ b/build_files/cmake/Modules/FindOptiX.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2019 Blender Foundation.
+
 # - Find OptiX library
 # Find the native OptiX includes and library
 # This module defines
@@ -7,13 +10,6 @@
 #                     This can also be an environment variable.
 #  OPTIX_FOUND, If false, do not try to use OptiX.
 
-#=============================================================================
-# Copyright 2019 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If OPTIX_ROOT_DIR was defined in the environment, use it.
 IF(NOT OPTIX_ROOT_DIR AND NOT $ENV{OPTIX_ROOT_DIR} STREQUAL "")
   SET(OPTIX_ROOT_DIR $ENV{OPTIX_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindPCRE.cmake b/build_files/cmake/Modules/FindPCRE.cmake
index 70b95e54d16..f21c0f80390 100644
--- a/build_files/cmake/Modules/FindPCRE.cmake
+++ b/build_files/cmake/Modules/FindPCRE.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find PCRE library
 # Find the native PCRE includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  PCRE_LIBRARY, where to find the PCRE library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If PCRE_ROOT_DIR was defined in the environment, use it.
 IF(NOT PCRE_ROOT_DIR AND NOT $ENV{PCRE_ROOT_DIR} STREQUAL "")
   SET(PCRE_ROOT_DIR $ENV{PCRE_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindPotrace.cmake b/build_files/cmake/Modules/FindPotrace.cmake
index 891a903af9f..7df641cb71a 100644
--- a/build_files/cmake/Modules/FindPotrace.cmake
+++ b/build_files/cmake/Modules/FindPotrace.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2020 Blender Foundation.
+
 # - Find potrace library
 # Find the potrace include and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  POTRACE_LIBRARY, where to find the POTRACE library.
 
-#=============================================================================
-# Copyright 2020 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If POTRACE_ROOT_DIR was defined in the environment, use it.
 IF(NOT POTRACE_ROOT_DIR AND NOT $ENV{POTRACE_ROOT_DIR} STREQUAL "")
   SET(POTRACE_ROOT_DIR $ENV{POTRACE_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindPugiXML.cmake b/build_files/cmake/Modules/FindPugiXML.cmake
index f5b1dfce4af..4aaa8ac82af 100644
--- a/build_files/cmake/Modules/FindPugiXML.cmake
+++ b/build_files/cmake/Modules/FindPugiXML.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2014 Blender Foundation.
+
 # - Find PugiXML library
 # Find the native PugiXML includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  PUGIXML_LIBRARY, where to find the PugiXML library.
 
-#=============================================================================
-# Copyright 2014 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If PUGIXML_ROOT_DIR was defined in the environment, use it.
 IF(NOT PUGIXML_ROOT_DIR AND NOT $ENV{PUGIXML_ROOT_DIR} STREQUAL "")
   SET(PUGIXML_ROOT_DIR $ENV{PUGIXML_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindPulse.cmake b/build_files/cmake/Modules/FindPulse.cmake
index d5c37e7df10..4865f15574f 100644
--- a/build_files/cmake/Modules/FindPulse.cmake
+++ b/build_files/cmake/Modules/FindPulse.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2021 Blender Foundation.
+
 # - Find PulseAudio library
 # Find the native PulseAudio includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  LIBPULSE_LIBRARY, where to find the PulseAudio library.
 
-#=============================================================================
-# Copyright 2021 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If LIBPULSE_ROOT_DIR was defined in the environment, use it.
 IF(NOT LIBPULSE_ROOT_DIR AND NOT $ENV{LIBPULSE_ROOT_DIR} STREQUAL "")
   SET(LIBPULSE_ROOT_DIR $ENV{LIBPULSE_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindPythonLibsUnix.cmake b/build_files/cmake/Modules/FindPythonLibsUnix.cmake
index e0fe8dd00cb..46e8a492972 100644
--- a/build_files/cmake/Modules/FindPythonLibsUnix.cmake
+++ b/build_files/cmake/Modules/FindPythonLibsUnix.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find Python libraries
 # Find the native Python includes and library
 #
@@ -22,13 +25,6 @@
 # also defined, but not for general use are
 #  PYTHON_LIBRARY, where to find the python library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If PYTHON_ROOT_DIR was defined in the environment, use it.
 IF(NOT PYTHON_ROOT_DIR AND NOT $ENV{PYTHON_ROOT_DIR} STREQUAL "")
   SET(PYTHON_ROOT_DIR $ENV{PYTHON_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindSDL2.cmake b/build_files/cmake/Modules/FindSDL2.cmake
index 5088a348aea..f8adb9ee225 100644
--- a/build_files/cmake/Modules/FindSDL2.cmake
+++ b/build_files/cmake/Modules/FindSDL2.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2015 Blender Foundation.
+
 # - Find SDL library
 # Find the native SDL includes and library
 # This module defines
@@ -10,13 +13,6 @@
 # also defined, but not for general use are
 #  SDL2_LIBRARY, where to find the SDL library.
 
-#=============================================================================
-# Copyright 2015 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If SDL2_ROOT_DIR was defined in the environment, use it.
 IF(NOT SDL2_ROOT_DIR AND NOT $ENV{SDL2_ROOT_DIR} STREQUAL "")
   SET(SDL2_ROOT_DIR $ENV{SDL2_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindSndFile.cmake b/build_files/cmake/Modules/FindSndFile.cmake
index 61f31a050c6..06684efa558 100644
--- a/build_files/cmake/Modules/FindSndFile.cmake
+++ b/build_files/cmake/Modules/FindSndFile.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find SndFile library
 # Find the native SndFile includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  LIBSNDFILE_LIBRARY, where to find the SndFile library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If LIBSNDFILE_ROOT_DIR was defined in the environment, use it.
 IF(NOT LIBSNDFILE_ROOT_DIR AND NOT $ENV{LIBSNDFILE_ROOT_DIR} STREQUAL "")
   SET(LIBSNDFILE_ROOT_DIR $ENV{LIBSNDFILE_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindSpacenav.cmake b/build_files/cmake/Modules/FindSpacenav.cmake
index aae2e521aed..12a376e59c3 100644
--- a/build_files/cmake/Modules/FindSpacenav.cmake
+++ b/build_files/cmake/Modules/FindSpacenav.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find Spacenav library
 # Find the native Spacenav includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  SPACENAV_LIBRARY, where to find the Spacenav library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If SPACENAV_ROOT_DIR was defined in the environment, use it.
 IF(NOT SPACENAV_ROOT_DIR AND NOT $ENV{SPACENAV_ROOT_DIR} STREQUAL "")
   SET(SPACENAV_ROOT_DIR $ENV{SPACENAV_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindTBB.cmake b/build_files/cmake/Modules/FindTBB.cmake
index 5a0d5a7d42d..ad7a1a218f8 100644
--- a/build_files/cmake/Modules/FindTBB.cmake
+++ b/build_files/cmake/Modules/FindTBB.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2016 Blender Foundation.
+
 # - Find TBB library
 # Find the native TBB includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  TBB_LIBRARY, where to find the TBB library.
 
-#=============================================================================
-# Copyright 2016 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If TBB_ROOT_DIR was defined in the environment, use it.
 IF(NOT TBB_ROOT_DIR AND NOT $ENV{TBB_ROOT_DIR} STREQUAL "")
   SET(TBB_ROOT_DIR $ENV{TBB_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindUSD.cmake b/build_files/cmake/Modules/FindUSD.cmake
index 805f349387f..840fa2d538f 100644
--- a/build_files/cmake/Modules/FindUSD.cmake
+++ b/build_files/cmake/Modules/FindUSD.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2019 Blender Foundation.
+
 # - Find Universal Scene Description (USD) library
 # Find the native USD includes and libraries
 # This module defines
@@ -9,13 +12,6 @@
 #  USD_FOUND, If false, do not try to use USD.
 #
 
-#=============================================================================
-# Copyright 2019 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If USD_ROOT_DIR was defined in the environment, use it.
 IF(NOT USD_ROOT_DIR AND NOT $ENV{USD_ROOT_DIR} STREQUAL "")
   SET(USD_ROOT_DIR $ENV{USD_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindXML2.cmake b/build_files/cmake/Modules/FindXML2.cmake
index 7d2d41d5a7c..70cc4b81a1b 100644
--- a/build_files/cmake/Modules/FindXML2.cmake
+++ b/build_files/cmake/Modules/FindXML2.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2011 Blender Foundation.
+
 # - Find XML2 library
 # Find the native XML2 includes and library
 # This module defines
@@ -11,13 +14,6 @@
 # also defined, but not for general use are
 #  XML2_LIBRARY, where to find the XML2 library.
 
-#=============================================================================
-# Copyright 2011 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If XML2_ROOT_DIR was defined in the environment, use it.
 IF(NOT XML2_ROOT_DIR AND NOT $ENV{XML2_ROOT_DIR} STREQUAL "")
   SET(XML2_ROOT_DIR $ENV{XML2_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindXR_OpenXR_SDK.cmake b/build_files/cmake/Modules/FindXR_OpenXR_SDK.cmake
index ddfbfe3fe5b..1788d03f856 100644
--- a/build_files/cmake/Modules/FindXR_OpenXR_SDK.cmake
+++ b/build_files/cmake/Modules/FindXR_OpenXR_SDK.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: BSD-3-Clause
+
 # - Find OpenXR-SDK libraries
 # Find the native OpenXR-SDK includes and libraries
 #
@@ -19,11 +21,6 @@
 # also defined, but not for general use are
 #  XR_OPENXR_SDK_LOADER_LIBRARY, where to find the OpenXR-SDK loader library.
 
-#=============================================================================
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If XR_OPENXR_SDK_ROOT_DIR was defined in the environment, use it.
 IF(NOT XR_OPENXR_SDK_ROOT_DIR AND NOT $ENV{XR_OPENXR_SDK_ROOT_DIR} STREQUAL "")
   SET(XR_OPENXR_SDK_ROOT_DIR $ENV{XR_OPENXR_SDK_ROOT_DIR})
diff --git a/build_files/cmake/Modules/FindZstd.cmake b/build_files/cmake/Modules/FindZstd.cmake
index 84606d01f44..90c561ec021 100644
--- a/build_files/cmake/Modules/FindZstd.cmake
+++ b/build_files/cmake/Modules/FindZstd.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2019 Blender Foundation.
+
 # - Find Zstd library
 # Find the native Zstd includes and library
 # This module defines
@@ -11,17 +14,6 @@
 # also defined, but not for general use are
 #  ZSTD_LIBRARY, where to find the Zstd library.
 
-#=============================================================================
-# Copyright 2019 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-
 # If ZSTD_ROOT_DIR was defined in the environment, use it.
 IF(NOT ZSTD_ROOT_DIR AND NOT $ENV{ZSTD_ROOT_DIR} STREQUAL "")
   SET(ZSTD_ROOT_DIR $ENV{ZSTD_ROOT_DIR})
diff --git a/build_files/cmake/Modules/Findsse2neon.cmake b/build_files/cmake/Modules/Findsse2neon.cmake
index 5c163326251..ae1ae4b0c7d 100644
--- a/build_files/cmake/Modules/Findsse2neon.cmake
+++ b/build_files/cmake/Modules/Findsse2neon.cmake
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2020 Blender Foundation.
+
 # - Find sse2neon library
 # Find the native sse2neon includes and library
 # This module defines
@@ -7,13 +10,6 @@
 #                     This can also be an environment variable.
 #  SSE2NEON_FOUND, If false, do not try to use sse2neon.
 
-#=============================================================================
-# Copyright 2020 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#=============================================================================
-
 # If SSE2NEON_ROOT_DIR was defined in the environment, use it.
 IF(NOT SSE2NEON_ROOT_DIR AND NOT $ENV{SSE2NEON_ROOT_DIR} STREQUAL "")
   SET(SSE2NEON_ROOT_DIR $ENV{SSE2NEON_ROOT_DIR})
diff --git a/build_files/cmake/Modules/GTest.cmake b/build_files/cmake/Modules/GTest.cmake
index 4faa47452b1..a38550958fd 100644
--- a/build_files/cmake/Modules/GTest.cmake
+++ b/build_files/cmake/Modules/GTest.cmake
@@ -1,5 +1,4 @@
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
+# SPDX-License-Identifier: BSD-3-Clause
 
 #[=======================================================================[.rst:
 GoogleTest
diff --git a/build_files/cmake/Modules/GTestTesting.cmake b/build_files/cmake/Modules/GTestTesting.cmake
index 0c78111eaaf..92ce403d5f3 100644
--- a/build_files/cmake/Modules/GTestTesting.cmake
+++ b/build_files/cmake/Modules/GTestTesting.cmake
@@ -1,12 +1,7 @@
-#=============================================================================
+# SPDX-License-Identifier: BSD-3-Clause
 # Copyright 2014 Blender Foundation.
-#
-# Distributed under the OSI-approved BSD 3-Clause License,
-# see accompanying file BSD-3-Clause-license.txt for details.
-#
+
 # Inspired on the Testing.cmake from Libmv
-#
-#=============================================================================
 
 function(GET_BLENDER_TEST_INSTALL_DIR VARIABLE_NAME)
   get_property(GENERATOR_IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
diff --git a/build_files/cmake/RpmBuild.cmake b/build_files/cmake/RpmBuild.cmake
index 2ece06bcad3..47e97b685b1 100644
--- a/build_files/cmake/RpmBuild.cmake
+++ b/build_files/cmake/RpmBuild.cmake
@@ -1,6 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # VLMC RPM Finder
 # Authors: Rohit Yadav <rohityadav89@gmail.com>
-#
 
 if(NOT DEFINED RPMBUILD)
 
diff --git a/build_files/cmake/buildinfo.cmake b/build_files/cmake/buildinfo.cmake
index 2b39c36a4e9..53e22ed23ad 100644
--- a/build_files/cmake/buildinfo.cmake
+++ b/build_files/cmake/buildinfo.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # This is called by cmake as an external process from
 # ./source/creator/CMakeLists.txt to write ./source/creator/buildinfo.h
 # Caller must define:
diff --git a/build_files/cmake/config/blender_developer.cmake b/build_files/cmake/config/blender_developer.cmake
index 7be9516d9dc..1f1a100d958 100644
--- a/build_files/cmake/config/blender_developer.cmake
+++ b/build_files/cmake/config/blender_developer.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Configuration for developers, with faster builds, error checking and tests.
 #
 # Example usage:
diff --git a/build_files/cmake/config/blender_full.cmake b/build_files/cmake/config/blender_full.cmake
index ccd5b47c776..9faa0118ae2 100644
--- a/build_files/cmake/config/blender_full.cmake
+++ b/build_files/cmake/config/blender_full.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Turn everything ON that's expected for an official release builds.
 #
 # Example usage:
diff --git a/build_files/cmake/config/blender_headless.cmake b/build_files/cmake/config/blender_headless.cmake
index 83253b28afc..24e30018b9e 100644
--- a/build_files/cmake/config/blender_headless.cmake
+++ b/build_files/cmake/config/blender_headless.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # headless configuration, useful in for servers or renderfarms
 # builds without a windowing system (X11/Windows/Cocoa).
 #
diff --git a/build_files/cmake/config/blender_lite.cmake b/build_files/cmake/config/blender_lite.cmake
index d7ba48050eb..2d895f55c31 100644
--- a/build_files/cmake/config/blender_lite.cmake
+++ b/build_files/cmake/config/blender_lite.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # turn everything OFF except for python which defaults to ON
 # and is needed for the UI
 #
diff --git a/build_files/cmake/config/blender_release.cmake b/build_files/cmake/config/blender_release.cmake
index da8724071b7..4e96975bd90 100644
--- a/build_files/cmake/config/blender_release.cmake
+++ b/build_files/cmake/config/blender_release.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Turn everything ON that's expected for an official release builds.
 #
 # Example usage:
diff --git a/build_files/cmake/config/bpy_module.cmake b/build_files/cmake/config/bpy_module.cmake
index 8e809175865..c4be5c2e61f 100644
--- a/build_files/cmake/config/bpy_module.cmake
+++ b/build_files/cmake/config/bpy_module.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # defaults for building blender as a python module 'bpy'
 #
 # Example usage:
diff --git a/build_files/cmake/config/cycles_standalone.cmake b/build_files/cmake/config/cycles_standalone.cmake
index 1b12f4de23f..88bd6aaa67c 100644
--- a/build_files/cmake/config/cycles_standalone.cmake
+++ b/build_files/cmake/config/cycles_standalone.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # only compile Cycles standalone, without Blender
 #
 # Example usage:
diff --git a/build_files/cmake/packaging.cmake b/build_files/cmake/packaging.cmake
index 265b3c0e2ab..2079cb7df51 100644
--- a/build_files/cmake/packaging.cmake
+++ b/build_files/cmake/packaging.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 string(TIMESTAMP CURRENT_YEAR "%Y")
 
 set(PROJECT_DESCRIPTION  "Blender is the free and open source 3D creation suite software.")
diff --git a/build_files/cmake/platform/platform_win32_bundle_crt.cmake b/build_files/cmake/platform/platform_win32_bundle_crt.cmake
index 699c89e29de..f5dd0c8c7bc 100644
--- a/build_files/cmake/platform/platform_win32_bundle_crt.cmake
+++ b/build_files/cmake/platform/platform_win32_bundle_crt.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # First generate the manifest for tests since it will not need the dependency on the CRT.
 configure_file(${CMAKE_SOURCE_DIR}/release/windows/manifest/blender.exe.manifest.in ${CMAKE_CURRENT_BINARY_DIR}/tests.exe.manifest @ONLY)
 
diff --git a/extern/draco/draco/CMakeLists.txt b/extern/draco/draco/CMakeLists.txt
index d775b39d3ac..7e9181a1dd1 100644
--- a/extern/draco/draco/CMakeLists.txt
+++ b/extern/draco/draco/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 remove_strict_flags()
 
 set(SRC
diff --git a/intern/audaspace/CMakeLists.txt b/intern/audaspace/CMakeLists.txt
index 254fb5ecf19..67b45be8158 100644
--- a/intern/audaspace/CMakeLists.txt
+++ b/intern/audaspace/CMakeLists.txt
@@ -1,23 +1,5 @@
-# ***** BEGIN LGPL LICENSE BLOCK *****
-#
+# SPDX-License-Identifier: GPL-2.0-or-later
 # Copyright 2009 Jrg Hermann Mller
-#
-# This file is part of AudaSpace.
-#
-# AudaSpace is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# AudaSpace 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 Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
-#
-# ***** END LGPL LICENSE BLOCK *****
 
 remove_strict_flags()
 
diff --git a/intern/ghost/test/CMakeLists.txt b/intern/ghost/test/CMakeLists.txt
index c564085c774..9cc406313c7 100644
--- a/intern/ghost/test/CMakeLists.txt
+++ b/intern/ghost/test/CMakeLists.txt
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 # see "cmake --help-policy CMP0003"
 # So library linking is more sane
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 3d9201bec04..484ffd17046 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 # Always run tests from install path, so all required scripts and libraries
 # are available and we are testing the actual installation layout.
diff --git a/tests/gtests/CMakeLists.txt b/tests/gtests/CMakeLists.txt
index 6e2dd380793..4723bc40394 100644
--- a/tests/gtests/CMakeLists.txt
+++ b/tests/gtests/CMakeLists.txt
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 if(WITH_GTESTS)
   # Otherwise we get warnings here that we can't fix in external projects