CMakeLists.txt

# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright 2006 Blender Foundation. All rights reserved.

# -----------------------------------------------------------------------------
# Early Initialization

# NOTE: We don't allow in-source builds. This causes no end of troubles because
# all out-of-source builds will use the CMakeCache.txt file there and even
# build the libs and objects in it.
if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
  if(NOT DEFINED WITH_IN_SOURCE_BUILD)
    message(FATAL_ERROR
      "CMake generation for blender is not allowed within the source directory!"
      "\n Remove \"${CMAKE_SOURCE_DIR}/CMakeCache.txt\" and try again from another folder, e.g.:"
      "\n "
      "\n rm -rf CMakeCache.txt CMakeFiles"
      "\n cd .."
      "\n mkdir cmake-make"
      "\n cd cmake-make"
      "\n cmake ../blender"
      "\n "
      "\n Alternately define WITH_IN_SOURCE_BUILD to force this option (not recommended!)"
    )
  endif()
endif()

cmake_minimum_required(VERSION 3.10)

if(NOT EXECUTABLE_OUTPUT_PATH)
  set(FIRST_RUN TRUE)
else()
  set(FIRST_RUN FALSE)
endif()

# this starts out unset
list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/build_files/cmake/Modules")
list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/build_files/cmake/platform")

# Avoid having an empty `CMAKE_BUILD_TYPE`.
if(NOT DEFINED CMAKE_BUILD_TYPE_INIT)
  set(CMAKE_BUILD_TYPE_INIT "Release")
  # Internal logic caches this variable, avoid showing it by default
  # since it's easy to accidentally set instead of the build type.
  mark_as_advanced(CMAKE_BUILD_TYPE_INIT)
endif()

# Omit superfluous "Up-to-date" messages.
if(NOT DEFINED CMAKE_INSTALL_MESSAGE)
  set(CMAKE_INSTALL_MESSAGE "LAZY")
endif()

# quiet output for Makefiles, 'make -s' helps too
# set_property(GLOBAL PROPERTY RULE_MESSAGES OFF)

# global compile definitions since add_definitions() adds for all.
set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS
  $<$<CONFIG:Debug>:DEBUG;_DEBUG>
  $<$<CONFIG:Release>:NDEBUG>
  $<$<CONFIG:MinSizeRel>:NDEBUG>
  $<$<CONFIG:RelWithDebInfo>:NDEBUG>
)


# -----------------------------------------------------------------------------
# Set policy

# see "cmake --help-policy CMP0003"
# So library linking is more sane
cmake_policy(SET CMP0003 NEW)

# So BUILDINFO and BLENDERPATH strings are automatically quoted
cmake_policy(SET CMP0005 NEW)

# So syntax problems are errors
cmake_policy(SET CMP0010 NEW)

# Input directories must have CMakeLists.txt
cmake_policy(SET CMP0014 NEW)

# Silence draco warning on macOS, new policy works fine.
if(POLICY CMP0068)
  cmake_policy(SET CMP0068 NEW)
endif()

# find_package() uses <PackageName>_ROOT variables.
if(POLICY CMP0074)
  cmake_policy(SET CMP0074 NEW)
endif()

# Install CODE|SCRIPT allow the use of generator expressions.
if(POLICY CMP0087)
  cmake_policy(SET CMP0087 NEW)
endif()


# -----------------------------------------------------------------------------
# Load Blender's Local Macros

include(build_files/cmake/macros.cmake)


# -----------------------------------------------------------------------------
# Initialize Project

blender_project_hack_pre()

project(Blender)

blender_project_hack_post()

enable_testing()


# -----------------------------------------------------------------------------
# Test Compiler Support
#
# Keep in sync with: https://wiki.blender.org/wiki/Building_Blender

if(CMAKE_COMPILER_IS_GNUCC)
  if("${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "9.3.1")
    message(FATAL_ERROR "The minimum supported version of GCC is 9.3.1")
  endif()
elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
  if(CMAKE_COMPILER_IS_GNUCC AND ("${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "8.0"))
    message(FATAL_ERROR "The minimum supported version of CLANG is 8.0")
  endif()
elseif(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
  if(MSVC_VERSION VERSION_LESS "1928")
    message(FATAL_ERROR "The minimum supported version of MSVC is 2019 (16.9.16)")
  endif()
endif()

# -----------------------------------------------------------------------------
# Test Compiler/Library Features

include(build_files/cmake/have_features.cmake)


# -----------------------------------------------------------------------------
# Redirect Output Files

set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin CACHE INTERNAL "" FORCE)
set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/lib CACHE INTERNAL "" FORCE)

get_property(GENERATOR_IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if(GENERATOR_IS_MULTI_CONFIG)
  set(TESTS_OUTPUT_DIR ${EXECUTABLE_OUTPUT_PATH}/tests/$<CONFIG>/ CACHE INTERNAL "" FORCE)
else()
  set(TESTS_OUTPUT_DIR ${EXECUTABLE_OUTPUT_PATH}/tests/ CACHE INTERNAL "" FORCE)
endif()


# -----------------------------------------------------------------------------
# Set Default Configuration Options

get_blender_version()


# -----------------------------------------------------------------------------
# Declare Options

# Blender internal features
option(WITH_BLENDER "Build blender (disable to build only the blender player)" ON)
mark_as_advanced(WITH_BLENDER)

if(APPLE)
  # In future, can be used with `quicklookthumbnailing/qlthumbnailreply` to create file
  # thumbnails for say Finder. Turn it off for now.
  option(WITH_BLENDER_THUMBNAILER "Build \"blender-thumbnailer\" thumbnail extraction utility" OFF)
elseif(WIN32)
  option(WITH_BLENDER_THUMBNAILER "Build \"BlendThumb.dll\" helper for Windows explorer integration" ON)
else()
  option(WITH_BLENDER_THUMBNAILER "Build \"blender-thumbnailer\" thumbnail extraction utility" ON)
endif()

option(WITH_INTERNATIONAL "Enable I18N (International fonts and text)" ON)

option(WITH_PYTHON        "Enable Embedded Python API  (only disable for development)" ON)
option(WITH_PYTHON_SECURITY "Disables execution of scripts within blend files by default" ON)
# Don't want people disabling this unless they really know what they are doing.
mark_as_advanced(WITH_PYTHON)
# Some distributions see this as a security issue, rather than have them patch it,
# make a build option.
mark_as_advanced(WITH_PYTHON_SECURITY)

option(WITH_PYTHON_SAFETY "Enable internal API error checking to track invalid data to prevent crash on access (at the expense of some efficiency, only enable for development)." OFF)
mark_as_advanced(WITH_PYTHON_SAFETY)
option(WITH_PYTHON_MODULE "Enable building as a python module which runs without a user interface, like running regular blender in background mode (experimental, only enable for development), installs to PYTHON_SITE_PACKAGES (or CMAKE_INSTALL_PREFIX if WITH_INSTALL_PORTABLE is enabled)." OFF)

option(WITH_BUILDINFO     "Include extra build details (only disable for development & faster builds)" ON)
set(BUILDINFO_OVERRIDE_DATE "" CACHE STRING "Use instead of the current date for reproducible builds (empty string disables this option)")
set(BUILDINFO_OVERRIDE_TIME "" CACHE STRING "Use instead of the current time for reproducible builds (empty string disables this option)")
set(CPACK_OVERRIDE_PACKAGENAME "" CACHE STRING "Use instead of the standard packagename (empty string disables this option)")
mark_as_advanced(CPACK_OVERRIDE_PACKAGENAME)
mark_as_advanced(BUILDINFO_OVERRIDE_DATE)
mark_as_advanced(BUILDINFO_OVERRIDE_TIME)

if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.16")
  option(WITH_UNITY_BUILD   "Enable unity build for modules that support it to improve compile times" ON)
  mark_as_advanced(WITH_UNITY_BUILD)
else()
  set(WITH_UNITY_BUILD OFF)
endif()

option(WITH_IK_ITASC      "Enable ITASC IK solver (only disable for development & for incompatible C++ compilers)" ON)
option(WITH_IK_SOLVER     "Enable Legacy IK solver (only disable for development)" ON)
option(WITH_FFTW3         "Enable FFTW3 support (Used for smoke, ocean sim, and audio effects)" ON)
option(WITH_PUGIXML       "Enable PugiXML support (Used for OpenImageIO, Grease Pencil SVG export)" ON)
option(WITH_BULLET        "Enable Bullet (Physics Engine)" ON)
option(WITH_SYSTEM_BULLET "Use the systems bullet library (currently unsupported due to missing features in upstream!)" )
mark_as_advanced(WITH_SYSTEM_BULLET)
option(WITH_OPENCOLORIO   "Enable OpenColorIO color management" ON)
if(APPLE)
  # There's no OpenXR runtime in sight for macOS, neither is code well
  # tested there -> disable it by default.
  option(WITH_XR_OPENXR   "Enable VR features through the OpenXR specification" OFF)
  mark_as_advanced(WITH_XR_OPENXR)
else()
  option(WITH_XR_OPENXR   "Enable VR features through the OpenXR specification" ON)
endif()
option(WITH_GMP "Enable features depending on GMP (Exact Boolean)" ON)

# Compositor
option(WITH_COMPOSITOR_CPU     "Enable the tile based CPU nodal compositor" ON)
option(WITH_OPENIMAGEDENOISE   "Enable the OpenImageDenoise compositing node" ON)

option(WITH_OPENSUBDIV    "Enable OpenSubdiv for surface subdivision" ON)

option(WITH_POTRACE       "Enable features relying on potrace" ON)
option(WITH_OPENVDB       "Enable features relying on OpenVDB" ON)
option(WITH_OPENVDB_BLOSC "Enable blosc compression for OpenVDB, only enable if OpenVDB was built with blosc support" ON)
option(WITH_OPENVDB_3_ABI_COMPATIBLE "Assume OpenVDB library has been compiled with version 3 ABI compatibility" OFF)
mark_as_advanced(WITH_OPENVDB_3_ABI_COMPATIBLE)
option(WITH_NANOVDB       "Enable usage of NanoVDB data structure for rendering on the GPU" ON)
option(WITH_HARU          "Enable features relying on Libharu (Grease pencil PDF export)" ON)

# GHOST Windowing Library Options
option(WITH_GHOST_DEBUG   "Enable debugging output for the GHOST library" OFF)
mark_as_advanced(WITH_GHOST_DEBUG)

option(WITH_GHOST_SDL    "Enable building Blender against SDL for windowing rather than the native APIs" OFF)
mark_as_advanced(WITH_GHOST_SDL)

if(UNIX AND NOT (APPLE OR HAIKU))
  option(WITH_GHOST_X11 "Enable building Blender against X11 for windowing" ON)
  mark_as_advanced(WITH_GHOST_X11)

  option(WITH_GHOST_WAYLAND "Enable building Blender against Wayland for windowing" ON)
  mark_as_advanced(WITH_GHOST_WAYLAND)

  if(WITH_GHOST_WAYLAND)
    option(WITH_GHOST_WAYLAND_LIBDECOR "Optionally build with LibDecor window decorations" ON)
    mark_as_advanced(WITH_GHOST_WAYLAND_LIBDECOR)

    option(WITH_GHOST_WAYLAND_DBUS "Optionally build with DBUS support (used for Cursor themes). May hang on startup systems where DBUS is not used." OFF)
    mark_as_advanced(WITH_GHOST_WAYLAND_DBUS)

    option(WITH_GHOST_WAYLAND_DYNLOAD  "Enable runtime dynamic WAYLAND libraries loading" ON)
    mark_as_advanced(WITH_GHOST_WAYLAND_DYNLOAD)

    set(WITH_GHOST_WAYLAND_APP_ID "" CACHE STRING "\
The application ID used for Blender (use default when an empty string), \
this can be used to differentiate Blender instances by version or branch for example."
    )
    mark_as_advanced(WITH_GHOST_WAYLAND_APP_ID)
  endif()
endif()

if(WITH_GHOST_X11)
  option(WITH_GHOST_XDND    "Enable drag'n'drop support on X11 using XDND protocol" ON)
endif()

# Misc...
option(WITH_HEADLESS      "Build without graphical support (renderfarm, server mode only)" OFF)
mark_as_advanced(WITH_HEADLESS)

option(WITH_QUADRIFLOW    "Build with quadriflow remesher support" ON)

option(WITH_AUDASPACE    "Build with blenders audio library (only disable if you know what you're doing!)" ON)
option(WITH_SYSTEM_AUDASPACE "Build with external audaspace library installed on the system (only enable if you know what you're doing!)" OFF)
mark_as_advanced(WITH_AUDASPACE)
mark_as_advanced(WITH_SYSTEM_AUDASPACE)

set_and_warn_dependency(WITH_AUDASPACE WITH_SYSTEM_AUDASPACE OFF)

option(WITH_OPENMP        "Enable OpenMP (has to be supported by the compiler)" ON)
if(UNIX AND NOT APPLE)
  option(WITH_OPENMP_STATIC "Link OpenMP statically (only used by the release environment)" OFF)
  mark_as_advanced(WITH_OPENMP_STATIC)
endif()

if(WITH_GHOST_X11)
  option(WITH_X11_XINPUT    "Enable X11 Xinput (tablet support and unicode input)"  ON)
  option(WITH_X11_XF86VMODE "Enable X11 video mode switching"                       ON)
  option(WITH_X11_XFIXES    "Enable X11 XWayland cursor warping workaround"         ON)
endif()

if(UNIX AND NOT APPLE)
  option(WITH_SYSTEM_FREETYPE "Use the freetype library provided by the operating system" OFF)
  option(WITH_SYSTEM_EIGEN3 "Use the systems Eigen3 library" OFF)
else()
  set(WITH_SYSTEM_FREETYPE OFF)
  set(WITH_SYSTEM_EIGEN3 OFF)
endif()


# Modifiers
option(WITH_MOD_FLUID           "Enable Mantaflow Fluid Simulation Framework" ON)
option(WITH_MOD_REMESH          "Enable Remesh Modifier" ON)
option(WITH_MOD_OCEANSIM        "Enable Ocean Modifier" ON)

# Image format support
option(WITH_OPENIMAGEIO         "Enable OpenImageIO Support (http://www.openimageio.org)" ON)
option(WITH_IMAGE_OPENEXR       "Enable OpenEXR Support (http://www.openexr.com)" ON)
option(WITH_IMAGE_OPENJPEG      "Enable OpenJpeg Support (http://www.openjpeg.org)" ON)
option(WITH_IMAGE_TIFF          "Enable LibTIFF Support" ON)
option(WITH_IMAGE_DDS           "Enable DDS Image Support" ON)
option(WITH_IMAGE_CINEON        "Enable CINEON and DPX Image Support" ON)
option(WITH_IMAGE_HDR           "Enable HDR Image Support" ON)
option(WITH_IMAGE_WEBP          "Enable WebP Image Support" ON)

# Audio/Video format support
option(WITH_CODEC_AVI           "Enable Blenders own AVI file support (raw/jpeg)" ON)
option(WITH_CODEC_FFMPEG        "Enable FFMPeg Support (http://ffmpeg.org)" ON)
option(WITH_CODEC_SNDFILE       "Enable libsndfile Support (http://www.mega-nerd.com/libsndfile)" ON)

# Alembic support
option(WITH_ALEMBIC             "Enable Alembic Support" ON)

# Universal Scene Description support
option(WITH_USD                 "Enable Universal Scene Description (USD) Support" ON)

# 3D format support
# Disable opencollada when we don't have precompiled libs
option(WITH_OPENCOLLADA   "Enable OpenCollada Support (http://www.opencollada.org)" ON)
option(WITH_IO_WAVEFRONT_OBJ  "Enable Wavefront-OBJ 3D file format support (*.obj)" ON)
option(WITH_IO_STL            "Enable STL 3D file format support (*.stl)" ON)
option(WITH_IO_GPENCIL        "Enable grease-pencil file format IO (*.svg, *.pdf)" ON)

# Sound output
option(WITH_SDL           "Enable SDL for sound" ON)
option(WITH_OPENAL        "Enable OpenAL Support (http://www.openal.org)" ON)
if(APPLE)
  option(WITH_COREAUDIO    "Enable CoreAudio for audio support on macOS" ON)
else()
  set(WITH_COREAUDIO OFF)
endif()
if(NOT WIN32)
  if(APPLE)
    option(WITH_JACK          "Enable JACK Support (http://www.jackaudio.org)" OFF)
  else()
    option(WITH_JACK          "Enable JACK Support (http://www.jackaudio.org)" ON)
  endif()
  option(WITH_JACK_DYNLOAD  "Enable runtime dynamic JACK libraries loading" OFF)
else()
  set(WITH_JACK OFF)
endif()
if(UNIX AND NOT APPLE)
  option(WITH_SDL_DYNLOAD  "Enable runtime dynamic SDL libraries loading" OFF)
endif()
if(UNIX AND NOT APPLE)
  option(WITH_PULSEAUDIO   "Enable PulseAudio for audio support on Linux" ON)
  option(WITH_PULSEAUDIO_DYNLOAD  "Enable runtime dynamic PulseAudio libraries loading" OFF)
else()
  set(WITH_PULSEAUDIO OFF)
endif()
if(WIN32)
  option(WITH_WASAPI      "Enable Windows Audio Sessions API for audio support on Windows" ON)
else()
  set(WITH_WASAPI OFF)
endif()

# Compression
option(WITH_LZO           "Enable fast LZO compression (used for pointcache)" ON)
option(WITH_LZMA          "Enable best LZMA compression, (used for pointcache)" ON)
if(UNIX AND NOT APPLE)
  option(WITH_SYSTEM_LZO    "Use the system LZO library" OFF)
endif()
option(WITH_DRACO         "Enable Draco mesh compression Python module (used for glTF)" ON)

# Camera/motion tracking
option(WITH_LIBMV         "Enable Libmv structure from motion library" ON)
option(WITH_LIBMV_SCHUR_SPECIALIZATIONS "Enable fixed-size schur specializations." ON)
mark_as_advanced(WITH_LIBMV_SCHUR_SPECIALIZATIONS)

# Logging/unbit test libraries.
option(WITH_SYSTEM_GFLAGS   "Use system-wide Gflags instead of a bundled one" OFF)
option(WITH_SYSTEM_GLOG     "Use system-wide Glog instead of a bundled one" OFF)
mark_as_advanced(WITH_SYSTEM_GFLAGS)
mark_as_advanced(WITH_SYSTEM_GLOG)

# Freestyle
option(WITH_FREESTYLE     "Enable Freestyle (advanced edges rendering)" ON)

# Misc
if(WIN32 OR APPLE)
  option(WITH_INPUT_IME "Enable Input Method Editor (IME) for complex Asian character input" ON)
endif()
option(WITH_INPUT_NDOF "Enable NDOF input devices (SpaceNavigator and friends)" ON)
if(UNIX AND NOT APPLE)
  option(WITH_INSTALL_PORTABLE "Install redistributable runtime, otherwise install into CMAKE_INSTALL_PREFIX" ON)
  option(WITH_STATIC_LIBS "Try to link with static libraries, as much as possible, to make blender more portable across distributions" OFF)
  if(WITH_STATIC_LIBS)
    option(WITH_BOOST_ICU "Boost uses ICU library (required for linking with static Boost built with libicu)." OFF)
    mark_as_advanced(WITH_BOOST_ICU)
  endif()
endif()

option(WITH_PYTHON_INSTALL       "Copy system python into the blender install folder" ON)

if((WITH_AUDASPACE AND NOT WITH_SYSTEM_AUDASPACE) OR WITH_MOD_FLUID)
  option(WITH_PYTHON_NUMPY "Include NumPy in Blender (used by Audaspace and Mantaflow)"  ON)
endif()

if(WIN32 OR APPLE)
  # Windows and macOS have this bundled with Python libraries.
elseif(WITH_PYTHON_INSTALL OR WITH_PYTHON_NUMPY)
  set(PYTHON_NUMPY_PATH            "" CACHE PATH "Path to python site-packages or dist-packages containing 'numpy' module")
  mark_as_advanced(PYTHON_NUMPY_PATH)
  set(PYTHON_NUMPY_INCLUDE_DIRS    "" CACHE PATH "Path to the include directory of the NumPy module")
  mark_as_advanced(PYTHON_NUMPY_INCLUDE_DIRS)
endif()
if(WITH_PYTHON_INSTALL)
  option(WITH_PYTHON_INSTALL_NUMPY "Copy system NumPy into the blender install folder"  ON)

  if(UNIX AND NOT APPLE)
    option(WITH_PYTHON_INSTALL_REQUESTS "Copy system requests into the blender install folder" ON)
    set(PYTHON_REQUESTS_PATH "" CACHE PATH "Path to python site-packages or dist-packages containing 'requests' module")
    mark_as_advanced(PYTHON_REQUESTS_PATH)
  endif()

  option(WITH_PYTHON_INSTALL_ZSTANDARD "Copy zstandard into the blender install folder" ON)
  set(PYTHON_ZSTANDARD_PATH "" CACHE PATH "Path to python site-packages or dist-packages containing 'zstandard' module")
  mark_as_advanced(PYTHON_ZSTANDARD_PATH)
endif()

option(WITH_CPU_SIMD              "Enable SIMD instruction if they're detected on the host machine" ON)
mark_as_advanced(WITH_CPU_SIMD)

# Cycles
option(WITH_CYCLES                   "Enable Cycles Render Engine" ON)
option(WITH_CYCLES_OSL               "Build Cycles with OpenShadingLanguage support" ON)
option(WITH_CYCLES_PATH_GUIDING      "Build Cycles with path guiding support" ON)
option(WITH_CYCLES_EMBREE            "Build Cycles with Embree support" ON)
option(WITH_CYCLES_LOGGING           "Build Cycles with logging support" ON)
option(WITH_CYCLES_DEBUG             "Build Cycles with options useful for debugging (e.g., MIS)" OFF)

option(WITH_CYCLES_STANDALONE        "Build Cycles standalone application" OFF)
option(WITH_CYCLES_STANDALONE_GUI    "Build Cycles standalone with GUI" OFF)

option(WITH_CYCLES_HYDRA_RENDER_DELEGATE "Build Cycles Hydra render delegate" OFF)

option(WITH_CYCLES_DEBUG_NAN         "Build Cycles with additional asserts for detecting NaNs and invalid values" OFF)
option(WITH_CYCLES_NATIVE_ONLY       "Build Cycles with native kernel only (which fits current CPU, use for development only)" OFF)
option(WITH_CYCLES_KERNEL_ASAN       "Build Cycles kernels with address sanitizer when WITH_COMPILER_ASAN is on, even if it's very slow" OFF)
set(CYCLES_TEST_DEVICES CPU CACHE STRING "Run regression tests on the specified device types (CPU CUDA OPTIX HIP)" )
mark_as_advanced(WITH_CYCLES_KERNEL_ASAN)
mark_as_advanced(WITH_CYCLES_LOGGING)
mark_as_advanced(WITH_CYCLES_DEBUG_NAN)
mark_as_advanced(WITH_CYCLES_NATIVE_ONLY)

# NVIDIA CUDA & OptiX
if(NOT APPLE)
  option(WITH_CYCLES_DEVICE_CUDA       "Enable Cycles NVIDIA CUDA compute support" ON)
  option(WITH_CYCLES_DEVICE_OPTIX      "Enable Cycles NVIDIA OptiX support" ON)
  mark_as_advanced(WITH_CYCLES_DEVICE_CUDA)

  option(WITH_CYCLES_CUDA_BINARIES     "Build Cycles NVIDIA CUDA binaries" OFF)
  set(CYCLES_CUDA_BINARIES_ARCH sm_30 sm_35 sm_37 sm_50 sm_52 sm_60 sm_61 sm_70 sm_75 sm_86 compute_75 CACHE STRING "CUDA architectures to build binaries for")
  option(WITH_CYCLES_CUDA_BUILD_SERIAL "Build cubins one after another (useful on machines with limited RAM)" OFF)
  option(WITH_CUDA_DYNLOAD             "Dynamically load CUDA libraries at runtime (for developers, makes cuda-gdb work)" ON)

  set(OPTIX_ROOT_DIR                   "" CACHE PATH "Path to the OptiX SDK root directory, for building Cycles OptiX kernels.")
  set(CYCLES_RUNTIME_OPTIX_ROOT_DIR    "" CACHE PATH "Path to the OptiX SDK root directory. When set, this path will be used at runtime to compile OptiX kernels.")

  mark_as_advanced(CYCLES_CUDA_BINARIES_ARCH)
  mark_as_advanced(WITH_CYCLES_CUDA_BUILD_SERIAL)
  mark_as_advanced(WITH_CUDA_DYNLOAD)
  mark_as_advanced(OPTIX_ROOT_DIR)
  mark_as_advanced(CYCLES_RUNTIME_OPTIX_ROOT_DIR)
endif()

# AMD HIP
if(NOT APPLE)
  option(WITH_CYCLES_DEVICE_HIP        "Enable Cycles AMD HIP support" ON)
  option(WITH_CYCLES_HIP_BINARIES      "Build Cycles AMD HIP binaries" OFF)
  set(CYCLES_HIP_BINARIES_ARCH gfx900 gfx906 gfx90c gfx902 gfx1010 gfx1011 gfx1012 gfx1030 gfx1031 gfx1032 gfx1034 gfx1035 gfx1100 gfx1101 gfx1102 CACHE STRING "AMD HIP architectures to build binaries for")
  mark_as_advanced(WITH_CYCLES_DEVICE_HIP)
  mark_as_advanced(CYCLES_HIP_BINARIES_ARCH)
endif()

# Apple Metal
if(APPLE)
  option(WITH_CYCLES_DEVICE_METAL       "Enable Cycles Apple Metal compute support" ON)
endif()

# oneAPI
if(NOT APPLE)
  option(WITH_CYCLES_DEVICE_ONEAPI "Enable Cycles oneAPI compute support" OFF)
  option(WITH_CYCLES_ONEAPI_BINARIES "Enable Ahead-Of-Time compilation for Cycles oneAPI device" OFF)

  # https://www.intel.com/content/www/us/en/develop/documentation/oneapi-dpcpp-cpp-compiler-dev-guide-and-reference/top/compilation/ahead-of-time-compilation.html
  # acm-g10 is the target for the first Intel Arc Alchemist GPUs.
  set(CYCLES_ONEAPI_SPIR64_GEN_DEVICES "acm-g10" CACHE STRING "oneAPI Intel GPU architectures to build binaries for")
  set(CYCLES_ONEAPI_SYCL_TARGETS spir64 spir64_gen CACHE STRING "oneAPI targets to build AOT binaries for")

  mark_as_advanced(CYCLES_ONEAPI_SPIR64_GEN_DEVICES)
  mark_as_advanced(CYCLES_ONEAPI_SYCL_TARGETS)
endif()

# Draw Manager
option(WITH_DRAW_DEBUG "Add extra debug capabilities to Draw Manager" OFF)
mark_as_advanced(WITH_DRAW_DEBUG)

# LLVM
option(WITH_LLVM                    "Use LLVM" OFF)
if(APPLE)
  option(LLVM_STATIC                  "Link with LLVM static libraries" ON) # we prefer static llvm build on Apple, dyn build possible though
else()
  option(LLVM_STATIC                  "Link with LLVM static libraries" OFF)
endif()
mark_as_advanced(LLVM_STATIC)
option(WITH_CLANG                   "Use Clang" OFF)

# disable for now, but plan to support on all platforms eventually
option(WITH_MEM_JEMALLOC   "Enable malloc replacement (http://www.canonware.com/jemalloc)" ON)
mark_as_advanced(WITH_MEM_JEMALLOC)

# currently only used for BLI_mempool
option(WITH_MEM_VALGRIND "Enable extended valgrind support for better reporting" OFF)
mark_as_advanced(WITH_MEM_VALGRIND)

# Debug
option(WITH_CXX_GUARDEDALLOC "Enable GuardedAlloc for C++ memory allocation tracking (only enable for development)" OFF)
mark_as_advanced(WITH_CXX_GUARDEDALLOC)

option(WITH_ASSERT_ABORT "Call abort() when raising an assertion through BLI_assert()" ON)
mark_as_advanced(WITH_ASSERT_ABORT)

if((UNIX AND NOT APPLE) OR (CMAKE_GENERATOR MATCHES "^Visual Studio.+"))
  option(WITH_CLANG_TIDY "Use Clang Tidy to analyze the source code (only enable for development on Linux using Clang, or Windows using the Visual Studio IDE)" OFF)
  mark_as_advanced(WITH_CLANG_TIDY)
endif()

option(WITH_BOOST "Enable features depending on boost" ON)
option(WITH_TBB   "Enable multithreading. TBB is also required for features such as Cycles, OpenVDB and USD" ON)

# TBB malloc is only supported on for windows currently
if(WIN32)
  option(WITH_TBB_MALLOC_PROXY "Enable the TBB malloc replacement" ON)
endif()

# This should be turned off when Blender enter beta/rc/release
if("${BLENDER_VERSION_CYCLE}" STREQUAL "alpha")
  set(WITH_EXPERIMENTAL_FEATURES ON)
else()
  set(WITH_EXPERIMENTAL_FEATURES OFF)
endif()

# Unit testing
option(WITH_GTESTS "Enable GTest unit testing" OFF)
option(WITH_OPENGL_RENDER_TESTS "Enable OpenGL render related unit testing (Experimental)" OFF)
option(WITH_OPENGL_DRAW_TESTS "Enable OpenGL UI drawing related unit testing (Experimental)" OFF)
# NOTE: All callers of this must add `TEST_PYTHON_EXE_EXTRA_ARGS` before any other arguments.
set(TEST_PYTHON_EXE "" CACHE PATH "Python executable to run unit tests")
mark_as_advanced(TEST_PYTHON_EXE)

# Documentation
if(UNIX AND NOT APPLE)
  option(WITH_DOC_MANPAGE "Create a manual page (Unix manpage)" OFF)
endif()


# OpenGL

option(WITH_OPENGL              "When off limits visibility of the opengl headers to just bf_gpu and gawain (temporary option for development purposes)" ON)
option(WITH_GPU_BUILDTIME_SHADER_BUILDER  "Shader builder is a developer option enabling linting on GLSL during compilation"                                  OFF)

mark_as_advanced(
  WITH_OPENGL
  WITH_GPU_BUILDTIME_SHADER_BUILDER
)

# Vulkan
option(WITH_VULKAN_BACKEND "Enable Vulkan as graphics backend (only for development)" OFF)
mark_as_advanced(
  WITH_VULKAN_BACKEND
)

# Metal

if(APPLE)
  option(WITH_METAL_BACKEND "Use Metal for graphics instead of (or as well as) OpenGL on macOS." OFF)
  mark_as_advanced(WITH_METAL_BACKEND)
else()
  set(WITH_METAL_BACKEND OFF)
endif()

if(WITH_METAL_BACKEND)
  set(CMAKE_OSX_DEPLOYMENT_TARGET "10.15" CACHE STRING "Minimum OS X deployment version" FORCE)
endif()

if(WIN32)
  getDefaultWindowsPrefixBase(CMAKE_GENERIC_PROGRAM_FILES)
  set(CPACK_INSTALL_PREFIX ${CMAKE_GENERIC_PROGRAM_FILES}/${})
endif()

# Compiler tool-chain.
if(UNIX AND NOT APPLE)
  if(CMAKE_COMPILER_IS_GNUCC)
    option(WITH_LINKER_GOLD "Use ld.gold linker which is usually faster than ld.bfd" ON)
    mark_as_advanced(WITH_LINKER_GOLD)
    option(WITH_LINKER_LLD "Use ld.lld linker which is usually faster than ld.gold" OFF)
    mark_as_advanced(WITH_LINKER_LLD)
  endif()
  if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
    option(WITH_LINKER_MOLD "Use ld.mold linker which is usually faster than ld.gold & ld.lld." OFF)
    mark_as_advanced(WITH_LINKER_MOLD)
  endif()
endif()

option(WITH_COMPILER_ASAN "Build and link against address sanitizer (only for Debug & RelWithDebInfo targets)." OFF)
mark_as_advanced(WITH_COMPILER_ASAN)

if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
  if(WITH_COMPILER_ASAN)
    set(_asan_defaults "\
-fsanitize=address \
-fsanitize=bool \
-fsanitize=bounds \
-fsanitize=enum \
-fsanitize=float-cast-overflow \
-fsanitize=float-divide-by-zero \
-fsanitize=nonnull-attribute \
-fsanitize=returns-nonnull-attribute \
-fsanitize=signed-integer-overflow \
-fsanitize=undefined \
-fsanitize=vla-bound \
-fno-sanitize=alignment \
")

    if(MSVC)
      # clang-cl doesn't support all sanitizers, but leak and object-size give errors/warnings.
      set(_asan_defaults "${_asan_defaults}")
    elseif(APPLE)
      # AppleClang doesn't support all sanitizers, but leak gives error.
      # Build type is not known for multi-config generator, so don't add object-size sanitizer.
      if(CMAKE_BUILD_TYPE MATCHES "Debug" OR GENERATOR_IS_MULTI_CONFIG)
        # Silence the warning that object-size is not effective in -O0.
        set(_asan_defaults "${_asan_defaults}")
      else()
        string(APPEND _asan_defaults " -fsanitize=object-size")
      endif()
    else()
      string(APPEND _asan_defaults " -fsanitize=leak -fsanitize=object-size")
    endif()

    set(COMPILER_ASAN_CFLAGS "${_asan_defaults}" CACHE STRING "C flags for address sanitizer")
    mark_as_advanced(COMPILER_ASAN_CFLAGS)
    set(COMPILER_ASAN_CXXFLAGS "${_asan_defaults}" CACHE STRING "C++ flags for address sanitizer")
    mark_as_advanced(COMPILER_ASAN_CXXFLAGS)

    unset(_asan_defaults)

    if(MSVC)
      find_library(
        COMPILER_ASAN_LIBRARY NAMES clang_rt.asan-x86_64
        PATHS
        [HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\LLVM\\LLVM;]/lib/clang/7.0.0/lib/windows
        [HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\LLVM\\LLVM;]/lib/clang/6.0.0/lib/windows
      )
    elseif(APPLE)
      execute_process(COMMAND ${CMAKE_CXX_COMPILER}
        -print-file-name=lib
        OUTPUT_VARIABLE CLANG_LIB_DIR
      )
      string(STRIP "${CLANG_LIB_DIR}" CLANG_LIB_DIR)
      find_library(
        COMPILER_ASAN_LIBRARY
        NAMES
          libclang_rt.asan_osx_dynamic.dylib
        PATHS
          "${CLANG_LIB_DIR}/darwin/"
      )
      unset(CLANG_LIB_DIR)
    else()
      find_library(
        COMPILER_ASAN_LIBRARY asan ${CMAKE_C_IMPLICIT_LINK_DIRECTORIES}
      )
    endif()

    mark_as_advanced(COMPILER_ASAN_LIBRARY)
  endif()
endif()

if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
  option(WITH_COMPILER_SHORT_FILE_MACRO "Make paths in macros like __FILE__ relative to top level source and build directories." ON)
  mark_as_advanced(WITH_COMPILER_SHORT_FILE_MACRO)
endif()

if(WIN32)
  # Use hardcoded paths or find_package to find externals
  option(WITH_WINDOWS_FIND_MODULES "Use find_package to locate libraries" OFF)
  mark_as_advanced(WITH_WINDOWS_FIND_MODULES)

  option(WINDOWS_PYTHON_DEBUG "Include the files needed for debugging python scripts with visual studio 2017+." OFF)
  mark_as_advanced(WINDOWS_PYTHON_DEBUG)

  option(WITH_WINDOWS_BUNDLE_CRT "Bundle the C runtime for install free distribution." ON)
  mark_as_advanced(WITH_WINDOWS_BUNDLE_CRT)

  option(WITH_WINDOWS_SCCACHE "Use sccache to speed up builds (Ninja builder only)" OFF)
  mark_as_advanced(WITH_WINDOWS_SCCACHE)

  option(WITH_WINDOWS_PDB "Generate a pdb file for client side stacktraces" ON)
  mark_as_advanced(WITH_WINDOWS_PDB)

  option(WITH_WINDOWS_STRIPPED_PDB "Use a stripped PDB file" ON)
  mark_as_advanced(WITH_WINDOWS_STRIPPED_PDB)

endif()

if(WIN32 OR XCODE)
  option(IDE_GROUP_SOURCES_IN_FOLDERS "Organize the source files in filters matching the source folders." ON)
  mark_as_advanced(IDE_GROUP_SOURCES_IN_FOLDERS)

  option(IDE_GROUP_PROJECTS_IN_FOLDERS "Organize the projects according to source folder structure." ON)
  mark_as_advanced(IDE_GROUP_PROJECTS_IN_FOLDERS)

  if(IDE_GROUP_PROJECTS_IN_FOLDERS)
    set_property(GLOBAL PROPERTY USE_FOLDERS ON)
  endif()
endif()

if(UNIX)
  # See WITH_WINDOWS_SCCACHE for Windows.
  option(WITH_COMPILER_CCACHE "Use ccache to improve rebuild times (Works with Ninja, Makefiles and Xcode)" OFF)
  mark_as_advanced(WITH_COMPILER_CCACHE)
endif()

# The following only works with the Ninja generator in CMake >= 3.0.
if("${CMAKE_GENERATOR}" MATCHES "Ninja")
  option(WITH_NINJA_POOL_JOBS
         "Enable Ninja pools of jobs, to try to ease building on machines with 16GB of RAM or less (if not yet defined, will try to set best values based on detected machine specifications)."
         OFF)
  mark_as_advanced(WITH_NINJA_POOL_JOBS)
endif()

if(UNIX AND NOT APPLE)
  option(WITH_CXX11_ABI "Use native C++11 ABI of compiler" ON)
  mark_as_advanced(WITH_CXX11_ABI)
endif()

# Installation process.
set(POSTINSTALL_SCRIPT "" CACHE FILEPATH "Run given CMake script after installation process")
mark_as_advanced(POSTINSTALL_SCRIPT)

set(POSTCONFIGURE_SCRIPT "" CACHE FILEPATH "Run given CMake script as the last step of CMake configuration")
mark_as_advanced(POSTCONFIGURE_SCRIPT)

# end option(...)


# By default we want to install to the directory we are compiling our executables
# unless specified otherwise, which we currently do not allow
if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
  if(WIN32)
    set(CMAKE_INSTALL_PREFIX ${EXECUTABLE_OUTPUT_PATH}/\${BUILD_TYPE} CACHE PATH "default install path" FORCE)
  elseif(APPLE)
    set(CMAKE_INSTALL_PREFIX ${EXECUTABLE_OUTPUT_PATH}/\${BUILD_TYPE} CACHE PATH "default install path" FORCE)
  else()
    if(WITH_INSTALL_PORTABLE)
      set(CMAKE_INSTALL_PREFIX ${EXECUTABLE_OUTPUT_PATH} CACHE PATH "default install path" FORCE)
    endif()
  endif()
endif()

# Effective install path including config folder, as a generator expression.
get_property(GENERATOR_IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if(GENERATOR_IS_MULTI_CONFIG)
  string(REPLACE "\${BUILD_TYPE}" "$<CONFIG>" CMAKE_INSTALL_PREFIX_WITH_CONFIG ${CMAKE_INSTALL_PREFIX})
else()
  string(REPLACE "\${BUILD_TYPE}" "" CMAKE_INSTALL_PREFIX_WITH_CONFIG ${CMAKE_INSTALL_PREFIX})
endif()


# Apple

if(APPLE)
  include(platform_apple_xcode)
endif()


# -----------------------------------------------------------------------------
# Check for Conflicting/Unsupported Configurations

option(WITH_STRICT_BUILD_OPTIONS "When requirements for a build option are not met, error instead of disabling the option" OFF)

if(NOT WITH_BLENDER AND NOT WITH_CYCLES_STANDALONE AND NOT WITH_CYCLES_HYDRA_RENDER_DELEGATE)
  message(FATAL_ERROR
    "At least one of WITH_BLENDER or WITH_CYCLES_STANDALONE "
    "or WITH_CYCLES_HYDRA_RENDER_DELEGATE "
    "must be enabled, nothing to do!"
  )
endif()

set_and_warn_dependency(WITH_AUDASPACE WITH_OPENAL OFF)
set_and_warn_dependency(WITH_AUDASPACE WITH_COREAUDIO OFF)
set_and_warn_dependency(WITH_AUDASPACE WITH_JACK OFF)
set_and_warn_dependency(WITH_AUDASPACE WITH_PULSEAUDIO OFF)
set_and_warn_dependency(WITH_AUDASPACE WITH_WASAPI OFF)

if(NOT WITH_SDL AND WITH_GHOST_SDL)
  message(FATAL_ERROR "WITH_GHOST_SDL requires WITH_SDL")
endif()

# python module, needs some different options
if(WITH_PYTHON_MODULE AND WITH_PYTHON_INSTALL)
  message(FATAL_ERROR "WITH_PYTHON_MODULE requires WITH_PYTHON_INSTALL to be OFF")
endif()

set_and_warn_dependency(WITH_PYTHON WITH_CYCLES        OFF)
set_and_warn_dependency(WITH_PYTHON WITH_DRACO         OFF)
set_and_warn_dependency(WITH_PYTHON WITH_MOD_FLUID     OFF)

if(WITH_DRACO AND NOT WITH_PYTHON_INSTALL)
  message(STATUS "WITH_DRACO requires WITH_PYTHON_INSTALL to be ON, disabling WITH_DRACO for now")
  set(WITH_DRACO OFF)
endif()

# enable boost for cycles, audaspace or i18n
# otherwise if the user disabled

set_and_warn_dependency(WITH_BOOST WITH_CYCLES         OFF)
set_and_warn_dependency(WITH_BOOST WITH_INTERNATIONAL  OFF)
set_and_warn_dependency(WITH_BOOST WITH_OPENVDB        OFF)
set_and_warn_dependency(WITH_BOOST WITH_OPENCOLORIO    OFF)
set_and_warn_dependency(WITH_BOOST WITH_QUADRIFLOW     OFF)
set_and_warn_dependency(WITH_BOOST WITH_USD            OFF)
set_and_warn_dependency(WITH_BOOST WITH_ALEMBIC        OFF)
if(WITH_CYCLES)
  set_and_warn_dependency(WITH_PUGIXML WITH_CYCLES_OSL   OFF)
endif()
set_and_warn_dependency(WITH_PUGIXML WITH_OPENIMAGEIO  OFF)

if(WITH_BOOST AND NOT (WITH_CYCLES OR WITH_OPENIMAGEIO OR WITH_INTERNATIONAL OR
  WITH_OPENVDB OR WITH_OPENCOLORIO OR WITH_USD OR WITH_ALEMBIC))
  message(STATUS "No dependencies need 'WITH_BOOST' forcing WITH_BOOST=OFF")
  set(WITH_BOOST OFF)
endif()

set_and_warn_dependency(WITH_TBB WITH_CYCLES            OFF)
set_and_warn_dependency(WITH_TBB WITH_USD               OFF)
set_and_warn_dependency(WITH_TBB WITH_OPENIMAGEDENOISE  OFF)
set_and_warn_dependency(WITH_TBB WITH_OPENVDB           OFF)
set_and_warn_dependency(WITH_TBB WITH_MOD_FLUID         OFF)

# NanoVDB requires OpenVDB to convert the data structure
set_and_warn_dependency(WITH_OPENVDB WITH_NANOVDB       OFF)

# OpenVDB and OpenColorIO uses 'half' type from OpenEXR
set_and_warn_dependency(WITH_IMAGE_OPENEXR WITH_OPENVDB OFF)
set_and_warn_dependency(WITH_IMAGE_OPENEXR WITH_OPENCOLORIO  OFF)

# Haru needs `TIFFFaxBlackCodes` & `TIFFFaxWhiteCodes` symbols from TIFF.
set_and_warn_dependency(WITH_IMAGE_TIFF WITH_HARU       OFF)

# USD needs OpenSubDiv, since that is used by the Cycles Hydra render delegate.
set_and_warn_dependency(WITH_OPENSUBDIV WITH_USD        OFF)

# auto enable openimageio for cycles
if(WITH_CYCLES)
  set(WITH_OPENIMAGEIO ON)

  # auto enable llvm for cycles_osl
  if(WITH_CYCLES_OSL)
    set(WITH_LLVM ON CACHE BOOL "" FORCE)
    set(WITH_CLANG ON CACHE BOOL "" FORCE)
  endif()
else()
  set(WITH_CYCLES_OSL OFF)
endif()

# auto enable openimageio linking dependencies
if(WITH_OPENIMAGEIO)
  set(WITH_IMAGE_OPENEXR ON)
  set(WITH_IMAGE_TIFF ON)
endif()

# auto enable alembic linking dependencies
if(WITH_ALEMBIC)
  set(WITH_IMAGE_OPENEXR ON)
endif()

# don't store paths to libs for portable distribution
if(WITH_INSTALL_PORTABLE)
  set(CMAKE_SKIP_BUILD_RPATH TRUE)
endif()

if(WITH_GHOST_SDL OR WITH_HEADLESS)
  message(STATUS "Disabling Ghost Wayland, X11, Input IME, and OpenXR")
  set(WITH_GHOST_WAYLAND OFF)
  set(WITH_GHOST_X11     OFF)
  set(WITH_X11_XINPUT    OFF)
  set(WITH_X11_XF86VMODE OFF)
  set(WITH_X11_XFIXES    OFF)
  set(WITH_GHOST_XDND    OFF)
  set(WITH_INPUT_IME     OFF)
  set(WITH_XR_OPENXR     OFF)
endif()

if(WITH_BUILDINFO)
  find_package(Git)
  set_and_warn_library_found("Git" GIT_FOUND WITH_BUILDINFO)
endif()

if(WITH_AUDASPACE)
  if(NOT WITH_SYSTEM_AUDASPACE)
    set(AUDASPACE_C_INCLUDE_DIRS "${CMAKE_SOURCE_DIR}/extern/audaspace/bindings/C" "${CMAKE_BINARY_DIR}/extern/audaspace")
    set(AUDASPACE_PY_INCLUDE_DIRS "${CMAKE_SOURCE_DIR}/extern/audaspace/bindings")
  endif()
endif()

# Auto-enable CUDA dynload if toolkit is not found.
if(WITH_CYCLES AND WITH_CYCLES_DEVICE_CUDA AND NOT WITH_CUDA_DYNLOAD)
  find_package(CUDA)
  if(NOT CUDA_FOUND)
    message(
      STATUS
      "CUDA toolkit not found, "
      "using dynamic runtime loading of libraries (WITH_CUDA_DYNLOAD) instead"
    )
    set(WITH_CUDA_DYNLOAD ON)
  endif()
endif()

if(WITH_CYCLES_DEVICE_HIP)
  # Currently HIP must be dynamically loaded, this may change in future toolkits
  set(WITH_HIP_DYNLOAD ON)
endif()


# -----------------------------------------------------------------------------
# Check if Sub-modules are Cloned

if(WITH_INTERNATIONAL)
  file(GLOB RESULT "${CMAKE_SOURCE_DIR}/release/datafiles/locale")
  list(LENGTH RESULT DIR_LEN)
  if(DIR_LEN EQUAL 0)
    message(
      WARNING
      "Translation path '${CMAKE_SOURCE_DIR}/release/datafiles/locale' is missing, "
      "This is a 'git submodule', which are known not to work with bridges to other version "
      "control systems."
    )
    set(TRANSLATIONS_FOUND OFF)
    set_and_warn_library_found("Translations" TRANSLATIONS_FOUND WITH_INTERNATIONAL)
  endif()
endif()

if(WITH_PYTHON)
  # While we have this as an '#error' in 'bpy_capi_utils.h',
  # upgrading Python tends to cause confusion for users who build.
  # Give the error message early to make this more obvious.
  #
  # Do this before main 'platform_*' checks,
  # because UNIX will search for the old Python paths which may not exist.
  # giving errors about missing paths before this case is met.
  if(DEFINED PYTHON_VERSION AND "${PYTHON_VERSION}" VERSION_LESS "3.10")
    message(
      FATAL_ERROR
      "At least Python 3.10 is required to build, but found Python ${PYTHON_VERSION}"
    )
  endif()

  file(GLOB RESULT "${CMAKE_SOURCE_DIR}/release/scripts/addons")
  list(LENGTH RESULT DIR_LEN)
  if(DIR_LEN EQUAL 0)
    message(
      WARNING
      "Addons path '${CMAKE_SOURCE_DIR}/release/scripts/addons' is missing, "
      "This is a 'git submodule', which are known not to work with bridges to other version "
      "control systems: * CONTINUING WITHOUT ADDONS *"
    )
  endif()
endif()


# -----------------------------------------------------------------------------
# InitialIze Un-cached Vars, Avoid Unused Warning

# linux only, not cached
set(WITH_BINRELOC OFF)

# MACOSX only, set to avoid uninitialized
set(EXETYPE "")

# C/C++ flags
set(PLATFORM_CFLAGS)

# these are added to later on.
set(C_WARNINGS)
set(CXX_WARNINGS)

# NOTE: These flags are intended for situations where where it's impractical to
# suppress warnings by modifying the code or for code which is maintained externally.
# For GCC this typically means adding `-Wno-*` arguments to negate warnings
# that are useful in the general case.
set(C_REMOVE_STRICT_FLAGS)
set(CXX_REMOVE_STRICT_FLAGS)

# Libraries to link to targets in setup_platform_linker_libs
set(PLATFORM_LINKLIBS "")

# Added to target linker flags in setup_platform_linker_flags
# - CMAKE_EXE_LINKER_FLAGS
# - CMAKE_EXE_LINKER_FLAGS_DEBUG
set(PLATFORM_LINKFLAGS "")
set(PLATFORM_LINKFLAGS_DEBUG "")

if(NOT CMAKE_BUILD_TYPE MATCHES "Release")
  if(WITH_COMPILER_ASAN)
    if(NOT APPLE)
      # Avoid passing address sanitizer compiler flags to `try_compile`.
      # Since linker flags are not set, all compiler checks and `find_package`
      # calls that rely on `try_compile` will fail.
      # See CMP0066 also.
      string(APPEND CMAKE_C_FLAGS_DEBUG " ${COMPILER_ASAN_CFLAGS}")
      string(APPEND CMAKE_C_FLAGS_RELWITHDEBINFO " ${COMPILER_ASAN_CFLAGS}")

      string(APPEND CMAKE_CXX_FLAGS_DEBUG " ${COMPILER_ASAN_CXXFLAGS}")
      string(APPEND CMAKE_CXX_FLAGS_RELWITHDEBINFO " ${COMPILER_ASAN_CXXFLAGS}")
    endif()
    if(MSVC)
      set(COMPILER_ASAN_LINKER_FLAGS "/FUNCTIONPADMIN:6")
    endif()

    if(APPLE AND COMPILER_ASAN_LIBRARY)
      string(REPLACE " " ";" _list_COMPILER_ASAN_CFLAGS ${COMPILER_ASAN_CFLAGS})
      set(_is_CONFIG_DEBUG "$<OR:$<CONFIG:Debug>,$<CONFIG:RelWithDebInfo>>")
      add_compile_options("$<${_is_CONFIG_DEBUG}:${_list_COMPILER_ASAN_CFLAGS}>")
      add_link_options("$<${_is_CONFIG_DEBUG}:-fno-omit-frame-pointer;-fsanitize=address>")
      unset(_list_COMPILER_ASAN_CFLAGS)
      unset(_is_CONFIG_DEBUG)
    elseif(COMPILER_ASAN_LIBRARY)
      set(PLATFORM_LINKLIBS "${PLATFORM_LINKLIBS};${COMPILER_ASAN_LIBRARY}")
      set(PLATFORM_LINKFLAGS "${COMPILER_ASAN_LIBRARY} ${COMPILER_ASAN_LINKER_FLAGS}")
      set(PLATFORM_LINKFLAGS_DEBUG "${COMPILER_ASAN_LIBRARY} ${COMPILER_ASAN_LINKER_FLAGS}")
    endif()
  endif()
endif()

# Test SIMD support, before platform includes to determine if sse2neon is needed.
if(WITH_CPU_SIMD)
  set(COMPILER_SSE_FLAG)
  set(COMPILER_SSE2_FLAG)

  # Test Neon first since macOS Arm can compile and run x86-64 SSE binaries.
  test_neon_support()
  if(NOT SUPPORT_NEON_BUILD)
    test_sse_support(COMPILER_SSE_FLAG COMPILER_SSE2_FLAG)
  endif()
endif()


# ----------------------------------------------------------------------------
# Main Platform Checks
#
# - UNIX
# - WIN32
# - APPLE

if(UNIX AND NOT APPLE)
  include(platform_unix)
elseif(WIN32)
  include(platform_win32)
elseif(APPLE)
  include(platform_apple)
endif()


# -----------------------------------------------------------------------------
# Common Checks for Compatible Options

if(NOT WITH_FFTW3 AND WITH_MOD_OCEANSIM)
  message(FATAL_ERROR "WITH_MOD_OCEANSIM requires WITH_FFTW3 to be ON")
endif()

if(WITH_CYCLES)
  if(NOT WITH_OPENIMAGEIO)
    message(
      FATAL_ERROR
      "Cycles requires WITH_OPENIMAGEIO, the library may not have been found. "
      "Configure OIIO or disable WITH_CYCLES"
    )
  endif()
  if(NOT WITH_BOOST)
    message(
      FATAL_ERROR
      "Cycles requires WITH_BOOST, the library may not have been found. "
      "Configure BOOST or disable WITH_CYCLES"
    )
  endif()

  if(WITH_CYCLES_OSL)
    if(NOT WITH_LLVM)
      message(
        FATAL_ERROR
        "Cycles OSL requires WITH_LLVM, the library may not have been found. "
        "Configure LLVM or disable WITH_CYCLES_OSL"
      )
    endif()
  endif()
endif()

if(WITH_INTERNATIONAL)
  if(NOT WITH_BOOST)
    message(
      FATAL_ERROR
      "Internationalization requires WITH_BOOST, the library may not have been found. "
      "Configure BOOST or disable WITH_INTERNATIONAL"
    )
  endif()
endif()

# Enable SIMD support if detected by `test_sse_support()` or `test_neon_support()`.
#
# This is done globally, so that all modules can use it if available, and
# because these are used in headers used by many modules.
if(WITH_CPU_SIMD)
  if(SUPPORT_NEON_BUILD)
    # Neon
    if(SSE2NEON_FOUND)
      include_directories(SYSTEM "${SSE2NEON_INCLUDE_DIRS}")
      add_definitions(-DWITH_SSE2NEON)
    endif()
  else()
    # SSE
    if(SUPPORT_SSE_BUILD)
      string(PREPEND PLATFORM_CFLAGS "${COMPILER_SSE_FLAG} ")
      add_definitions(-D__SSE__ -D__MMX__)
    endif()
    if(SUPPORT_SSE2_BUILD)
      string(APPEND PLATFORM_CFLAGS " ${COMPILER_SSE2_FLAG}")
      add_definitions(-D__SSE2__)
      if(NOT SUPPORT_SSE_BUILD) # don't double up
        add_definitions(-D__MMX__)
      endif()
    endif()
  endif()

  # Print instructions used
  if(SUPPORT_NEON_BUILD)
    if(SSE2NEON_FOUND)
      message(STATUS "Neon SIMD instructions enabled")
    else()
      message(STATUS "Neon SIMD instructions detected but unused, requires sse2neon")
    endif()
  elseif(SUPPORT_SSE2_BUILD)
    message(STATUS "SSE2 SIMD instructions enabled")
  elseif(SUPPORT_SSE_BUILD)
    message(STATUS "SSE SIMD instructions enabled")
  else()
    message(STATUS "No SIMD instructions detected")
  endif()
else()
  message(STATUS "SIMD instructions disabled")
endif()

# set the endian define
if(MSVC)
  # for some reason this fails on msvc
  add_definitions(-D__LITTLE_ENDIAN__)

  # OSX-Note: as we do cross-compiling with specific set architecture,
  # endianness-detection and auto-setting is counterproductive
  # so we just set endianness according CMAKE_OSX_ARCHITECTURES

elseif(CMAKE_OSX_ARCHITECTURES MATCHES i386 OR CMAKE_OSX_ARCHITECTURES MATCHES x86_64 OR CMAKE_OSX_ARCHITECTURES MATCHES arm64)
  add_definitions(-D__LITTLE_ENDIAN__)
elseif(CMAKE_OSX_ARCHITECTURES MATCHES ppc OR CMAKE_OSX_ARCHITECTURES MATCHES ppc64)
  add_definitions(-D__BIG_ENDIAN__)

else()
  include(TestBigEndian)
  test_big_endian(_SYSTEM_BIG_ENDIAN)
  if(_SYSTEM_BIG_ENDIAN)
    add_definitions(-D__BIG_ENDIAN__)
  else()
    add_definitions(-D__LITTLE_ENDIAN__)
  endif()
  unset(_SYSTEM_BIG_ENDIAN)
endif()
if(WITH_IMAGE_OPENJPEG)
  # Special handling of Windows platform where openjpeg is always static.
  if(WIN32)
    set(OPENJPEG_DEFINES "-DOPJ_STATIC")
  else()
    set(OPENJPEG_DEFINES "")
  endif()
endif()

if(NOT WITH_SYSTEM_EIGEN3)
  set(EIGEN3_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/extern/Eigen3)
endif()

if(WITH_OPENVDB)
  list(APPEND OPENVDB_DEFINITIONS -DWITH_OPENVDB)

  if(WITH_OPENVDB_3_ABI_COMPATIBLE)
    list(APPEND OPENVDB_DEFINITIONS -DOPENVDB_3_ABI_COMPATIBLE)
  endif()

  # OpenVDB headers use deprecated TBB headers, silence warning.
  list(APPEND OPENVDB_DEFINITIONS -DTBB_SUPPRESS_DEPRECATED_MESSAGES=1)

  list(APPEND OPENVDB_INCLUDE_DIRS
    ${BOOST_INCLUDE_DIR}
    ${TBB_INCLUDE_DIRS}
    ${OPENEXR_INCLUDE_DIRS}
  )

  list(APPEND OPENVDB_LIBRARIES ${OPENEXR_LIBRARIES} ${ZLIB_LIBRARIES})

  if(WITH_OPENVDB_BLOSC)
    list(APPEND OPENVDB_DEFINITIONS -DWITH_OPENVDB_BLOSC)
    list(APPEND OPENVDB_LIBRARIES ${BLOSC_LIBRARIES} ${ZLIB_LIBRARIES})
  endif()

  list(APPEND OPENVDB_LIBRARIES ${BOOST_LIBRARIES} ${TBB_LIBRARIES})
endif()


# -----------------------------------------------------------------------------
# Configure OpenGL

if(WITH_OPENGL)
  add_definitions(-DWITH_OPENGL)
endif()

#-----------------------------------------------------------------------------
# Configure Vulkan.

if(WITH_VULKAN_BACKEND)
  list(APPEND BLENDER_GL_LIBRARIES ${VULKAN_LIBRARIES})
endif()

# -----------------------------------------------------------------------------
# Configure Metal

if(WITH_METAL_BACKEND)
  add_definitions(-DWITH_METAL_BACKEND)

  # No need to add frameworks here, all the ones we need for Metal and
  # Metal-OpenGL Interop are already being added by
  # build_files/cmake/platform/platform_apple.cmake
endif()


# -----------------------------------------------------------------------------
# Configure OpenMP

if(WITH_OPENMP)
  if(NOT OPENMP_CUSTOM)
    find_package(OpenMP)
  endif()

  set_and_warn_library_found("OpenMP" OPENMP_FOUND WITH_OPENMP)

  if(OPENMP_FOUND)
    if(NOT WITH_OPENMP_STATIC)
      string(APPEND CMAKE_C_FLAGS " ${OpenMP_C_FLAGS}")
      string(APPEND CMAKE_CXX_FLAGS " ${OpenMP_CXX_FLAGS}")
      string(APPEND CMAKE_EXE_LINKER_FLAGS " ${OpenMP_LINKER_FLAGS}")
      string(APPEND CMAKE_MODULE_LINKER_FLAGS " ${OpenMP_LINKER_FLAGS}")
    else()
      # Typically avoid adding flags as defines but we can't
      # pass OpenMP flags to the linker for static builds, meaning
      # we can't add any OpenMP related flags to CFLAGS variables
      # since they're passed to the linker as well.
      add_definitions("${OpenMP_C_FLAGS}")

      find_library_static(OpenMP_LIBRARIES gomp ${CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES})
    endif()
  endif()

  mark_as_advanced(
    OpenMP_C_FLAGS
    OpenMP_CXX_FLAGS
  )
endif()


# -----------------------------------------------------------------------------
# Configure Bullet

if(WITH_BULLET AND WITH_SYSTEM_BULLET)
  find_package(Bullet)
  set_and_warn_library_found("Bullet" BULLET_FOUND WITH_BULLET)
else()
  set(BULLET_INCLUDE_DIRS "${CMAKE_SOURCE_DIR}/extern/bullet2/src")
  # set(BULLET_LIBRARIES "")
endif()


# -----------------------------------------------------------------------------
# Configure Python

if(WITH_PYTHON_MODULE)
  # Not currently supported due to different required Python link flags.
  if(WITH_GTESTS)
    message(STATUS "GTests not compatible with Python module, disabling WITH_GTESTS")
    set(WITH_GTESTS OFF)
  endif()
endif()


# -----------------------------------------------------------------------------
# Configure `GLog/GFlags`

if(WITH_LIBMV OR WITH_GTESTS OR (WITH_CYCLES AND WITH_CYCLES_LOGGING))
  if(WITH_SYSTEM_GFLAGS)
    find_package(Gflags)
    if(NOT GFLAGS_FOUND)
      message(FATAL_ERROR "System wide Gflags is requested but was not found")
    endif()
    # `FindGflags` does not define this, and we are not even sure what to use here.
    set(GFLAGS_DEFINES)
  else()
    set(GFLAGS_DEFINES
      -DGFLAGS_DLL_DEFINE_FLAG=
      -DGFLAGS_DLL_DECLARE_FLAG=
      -DGFLAGS_DLL_DECL=
    )
    set(GFLAGS_NAMESPACE "gflags")
    set(GFLAGS_LIBRARIES extern_gflags)
    set(GFLAGS_INCLUDE_DIRS "${PROJECT_SOURCE_DIR}/extern/gflags/src")
  endif()

  if(WITH_SYSTEM_GLOG)
    find_package(Glog)
    if(NOT GLOG_FOUND)
      message(FATAL_ERROR "System wide Glog is requested but was not found")
    endif()
    # `FindGlog` does not define this, and we are not even sure what to use here.
    set(GLOG_DEFINES)
  else()
    set(GLOG_DEFINES
      -DGOOGLE_GLOG_DLL_DECL=
    )
    set(GLOG_LIBRARIES extern_glog)
    if(WIN32)
      set(GLOG_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/extern/glog/src/windows)
    else()
      set(GLOG_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/extern/glog/include)
    endif()
  endif()
endif()


# -----------------------------------------------------------------------------
# Ninja Job Limiting

# Extra limits to number of jobs running in parallel for some kind os tasks.
# Only supported by Ninja build system currently.

if("${CMAKE_GENERATOR}" MATCHES "Ninja" AND WITH_NINJA_POOL_JOBS)
  if(NOT NINJA_MAX_NUM_PARALLEL_COMPILE_JOBS AND
     NOT NINJA_MAX_NUM_PARALLEL_COMPILE_HEAVY_JOBS AND
     NOT NINJA_MAX_NUM_PARALLEL_LINK_JOBS)
    # Try to define good default values.
    # Max mem of heavy cpp files compilation: about 2.5GB
    # Max mem during linking: about 3.3GB
    cmake_host_system_information(RESULT _NUM_CORES QUERY NUMBER_OF_LOGICAL_CORES)
    # Note: this gives mem in MB.
    cmake_host_system_information(RESULT _TOT_MEM QUERY TOTAL_PHYSICAL_MEMORY)

    # Heuristics: the more cores we have, the more free memory we have to keep
    # for the non-heavy tasks too.
    if(${_TOT_MEM} LESS 8000 AND ${_NUM_CORES} GREATER 2)
      set(_compile_heavy_jobs "1")
    elseif(${_TOT_MEM} LESS 16000 AND ${_NUM_CORES} GREATER 4)
      set(_compile_heavy_jobs "2")
    elseif(${_TOT_MEM} LESS 24000 AND ${_NUM_CORES} GREATER 8)
      set(_compile_heavy_jobs "3")
    elseif(${_TOT_MEM} LESS 32000 AND ${_NUM_CORES} GREATER 16)
      set(_compile_heavy_jobs "4")
    elseif(${_TOT_MEM} LESS 64000 AND ${_NUM_CORES} GREATER 32)
      set(_compile_heavy_jobs "8")
    else()
      set(_compile_heavy_jobs "")
    endif()

    set(NINJA_MAX_NUM_PARALLEL_COMPILE_HEAVY_JOBS "${_compile_heavy_jobs}" CACHE STRING
        "Define the maximum number of concurrent heavy compilation jobs, for ninja build system (used for some targets which cpp files can take several GB each during compilation)." FORCE)
    mark_as_advanced(NINJA_MAX_NUM_PARALLEL_COMPILE_HEAVY_JOBS)
    set(_compile_heavy_jobs)

    # Only set regular compile jobs if we set heavy jobs,
    # otherwise default (using all cores) if fine.
    if(NINJA_MAX_NUM_PARALLEL_COMPILE_HEAVY_JOBS)
      math(EXPR _compile_jobs "${_NUM_CORES} - 1")
    else()
      set(_compile_jobs "")
    endif()
    set(NINJA_MAX_NUM_PARALLEL_COMPILE_JOBS "${_compile_jobs}" CACHE STRING
        "Define the maximum number of concurrent compilation jobs, for ninja build system." FORCE)
    mark_as_advanced(NINJA_MAX_NUM_PARALLEL_COMPILE_JOBS)
    set(_compile_jobs)

    # In practice, even when there is RAM available,
    # this proves to be quicker than running in parallel (due to slow disks accesses).
    set(NINJA_MAX_NUM_PARALLEL_LINK_JOBS "1" CACHE STRING
        "Define the maximum number of concurrent link jobs, for ninja build system." FORCE)
    mark_as_advanced(NINJA_MAX_NUM_PARALLEL_LINK_JOBS)

    set(_NUM_CORES)
    set(_TOT_MEM)
  endif()

  if(NINJA_MAX_NUM_PARALLEL_COMPILE_JOBS)
    set_property(GLOBAL APPEND PROPERTY JOB_POOLS compile_job_pool=${NINJA_MAX_NUM_PARALLEL_COMPILE_JOBS})
    set(CMAKE_JOB_POOL_COMPILE compile_job_pool)
  endif()

  if(NINJA_MAX_NUM_PARALLEL_COMPILE_HEAVY_JOBS)
    set_property(GLOBAL APPEND PROPERTY JOB_POOLS compile_heavy_job_pool=${NINJA_MAX_NUM_PARALLEL_COMPILE_HEAVY_JOBS})
  endif()

  if(NINJA_MAX_NUM_PARALLEL_LINK_JOBS)
    set_property(GLOBAL APPEND PROPERTY JOB_POOLS link_job_pool=${NINJA_MAX_NUM_PARALLEL_LINK_JOBS})
    set(CMAKE_JOB_POOL_LINK link_job_pool)
  endif()
endif()


# -----------------------------------------------------------------------------
# Extra Compile Flags

if(CMAKE_COMPILER_IS_GNUCC)

  add_check_c_compiler_flag(C_WARNINGS C_WARN_ALL -Wall)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_ERROR_IMPLICIT_FUNCTION_DECLARATION -Werror=implicit-function-declaration)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_ERROR_RETURN_TYPE  -Werror=return-type)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_ERROR_VLA -Werror=vla)
  # system headers sometimes do this, disable for now, was: -Werror=strict-prototypes
  add_check_c_compiler_flag(C_WARNINGS C_WARN_STRICT_PROTOTYPES  -Wstrict-prototypes)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_MISSING_PROTOTYPES -Wmissing-prototypes)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_CHAR_SUBSCRIPTS -Wno-char-subscripts)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_UNKNOWN_PRAGMAS -Wno-unknown-pragmas)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_POINTER_ARITH -Wpointer-arith)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_UNUSED_PARAMETER -Wunused-parameter)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_WRITE_STRINGS -Wwrite-strings)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_LOGICAL_OP -Wlogical-op)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_UNDEF -Wundef)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_INIT_SELF -Winit-self)  # needs -Wuninitialized
  add_check_c_compiler_flag(C_WARNINGS C_WARN_MISSING_INCLUDE_DIRS -Wmissing-include-dirs)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_DIV_BY_ZERO -Wno-div-by-zero)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_TYPE_LIMITS -Wtype-limits)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_FORMAT_SIGN -Wformat-signedness)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_RESTRICT -Wrestrict)

  # C-only.
  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_NULL -Wnonnull)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_ABSOLUTE_VALUE -Wabsolute-value)

  add_check_c_compiler_flag(C_WARNINGS C_WARN_UNINITIALIZED -Wuninitialized)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_UNINITIALIZED -Wuninitialized)

  add_check_c_compiler_flag(C_WARNINGS C_WARN_REDUNDANT_DECLS       -Wredundant-decls)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_REDUNDANT_DECLS -Wredundant-decls)

  add_check_c_compiler_flag(C_WARNINGS C_WARN_SHADOW -Wshadow)

  # disable because it gives warnings for printf() & friends.
  # add_check_c_compiler_flag(C_WARNINGS C_WARN_DOUBLE_PROMOTION -Wdouble-promotion -Wno-error=double-promotion)

  if(NOT APPLE)
    add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_ERROR_UNUSED_BUT_SET_VARIABLE -Wno-error=unused-but-set-variable)
  endif()

  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_ALL -Wall)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_INVALID_OFFSETOF -Wno-invalid-offsetof)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_SIGN_COMPARE -Wno-sign-compare)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_LOGICAL_OP -Wlogical-op)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_INIT_SELF -Winit-self)  # needs -Wuninitialized
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_MISSING_INCLUDE_DIRS -Wmissing-include-dirs)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_DIV_BY_ZERO -Wno-div-by-zero)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_TYPE_LIMITS -Wtype-limits)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_ERROR_RETURN_TYPE  -Werror=return-type)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_CHAR_SUBSCRIPTS -Wno-char-subscripts)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_UNKNOWN_PRAGMAS -Wno-unknown-pragmas)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_POINTER_ARITH -Wpointer-arith)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_UNUSED_PARAMETER -Wunused-parameter)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_WRITE_STRINGS -Wwrite-strings)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_UNDEF -Wundef)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_FORMAT_SIGN -Wformat-signedness)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_RESTRICT -Wrestrict)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_SUGGEST_OVERRIDE  -Wno-suggest-override)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_UNINITIALIZED -Wuninitialized)

  # causes too many warnings
  if(NOT APPLE)
    add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_UNDEF -Wundef)
    add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_MISSING_DECLARATIONS -Wmissing-declarations)
  endif()

  # Use 'ATTR_FALLTHROUGH' macro to suppress.
  add_check_c_compiler_flag(C_WARNINGS C_WARN_IMPLICIT_FALLTHROUGH -Wimplicit-fallthrough=5)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_IMPLICIT_FALLTHROUGH -Wimplicit-fallthrough=5)

  # ---------------------
  # Suppress Strict Flags
  #
  # Exclude the following warnings from this list:
  # - `-Wno-address`:
  #   This can give useful hints that point to bugs/misleading logic.
  # - `-Wno-strict-prototypes`:
  #   No need to support older C-style prototypes.
  #
  # If code in `./extern/` needs to suppress these flags that can be done on a case-by-case basis.

  # flags to undo strict flags
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_DEPRECATED_DECLARATIONS -Wno-deprecated-declarations)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_PARAMETER        -Wno-unused-parameter)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_FUNCTION         -Wno-unused-function)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_TYPE_LIMITS             -Wno-type-limits)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_INT_IN_BOOL_CONTEXT     -Wno-int-in-bool-context)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_FORMAT                  -Wno-format)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_SWITCH                  -Wno-switch)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_VARIABLE         -Wno-unused-variable)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_VARIABLE         -Wno-uninitialized)

  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_CLASS_MEMACCESS     -Wno-class-memaccess)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_COMMENT             -Wno-comment)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_TYPEDEFS     -Wno-unused-local-typedefs)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_VARIABLE     -Wno-unused-variable)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_VARIABLE     -Wno-uninitialized)

  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_IMPLICIT_FALLTHROUGH    -Wno-implicit-fallthrough)

  if(NOT APPLE)
    add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_ERROR_UNUSED_BUT_SET_VARIABLE -Wno-error=unused-but-set-variable)
  endif()

elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")

  # strange, clang complains these are not supported, but then uses them.
  add_check_c_compiler_flag(C_WARNINGS C_WARN_ALL -Wall)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_ERROR_IMPLICIT_FUNCTION_DECLARATION -Werror=implicit-function-declaration)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_ERROR_RETURN_TYPE  -Werror=return-type)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_AUTOLOGICAL_COMPARE -Wno-tautological-compare)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_UNKNOWN_PRAGMAS -Wno-unknown-pragmas)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_CHAR_SUBSCRIPTS -Wno-char-subscripts)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_STRICT_PROTOTYPES  -Wstrict-prototypes)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_MISSING_PROTOTYPES -Wmissing-prototypes)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_UNUSED_PARAMETER -Wunused-parameter)

  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_ALL -Wall)
  # Using C++20 features while having C++17 as the project language isn't allowed by MSVC.
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_CXX20_DESIGNATOR -Wc++20-designator)

  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_AUTOLOGICAL_COMPARE -Wno-tautological-compare)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_UNKNOWN_PRAGMAS     -Wno-unknown-pragmas)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_CHAR_SUBSCRIPTS     -Wno-char-subscripts)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_OVERLOADED_VIRTUAL  -Wno-overloaded-virtual)  # we get a lot of these, if its a problem a dev needs to look into it.
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_SIGN_COMPARE        -Wno-sign-compare)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_INVALID_OFFSETOF    -Wno-invalid-offsetof)
  # Apple Clang (tested on version 12) doesn't support this flag while LLVM Clang 11 does.
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_SUGGEST_OVERRIDE    -Wno-suggest-override)

  # gives too many unfixable warnings
  # add_check_c_compiler_flag(C_WARNINGS C_WARN_UNUSED_MACROS      -Wunused-macros)
  # add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_UNUSED_MACROS          -Wunused-macros)

  # ---------------------
  # Suppress Strict Flags

  # flags to undo strict flags
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_PARAMETER -Wno-unused-parameter)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_VARIABLE  -Wno-unused-variable)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_MACROS    -Wno-unused-macros)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_MISLEADING_INDENTATION    -Wno-misleading-indentation)

  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_MISSING_VARIABLE_DECLARATIONS -Wno-missing-variable-declarations)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_INCOMPAT_PTR_DISCARD_QUAL -Wno-incompatible-pointer-types-discards-qualifiers)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_FUNCTION -Wno-unused-function)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_INT_TO_VOID_POINTER_CAST -Wno-int-to-void-pointer-cast)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_MISSING_PROTOTYPES -Wno-missing-prototypes)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_DUPLICATE_ENUM -Wno-duplicate-enum)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNDEF -Wno-undef)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_MISSING_NORETURN -Wno-missing-noreturn)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_BUT_SET_VARIABLE -Wno-unused-but-set-variable)
  add_check_c_compiler_flag(C_REMOVE_STRICT_FLAGS C_WARN_NO_DEPRECATED_DECLARATIONS -Wno-deprecated-declarations)

  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_PARAMETER -Wno-unused-parameter)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_PRIVATE_FIELD -Wno-unused-private-field)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_CXX11_NARROWING -Wno-c++11-narrowing)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_NON_VIRTUAL_DTOR -Wno-non-virtual-dtor)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_MACROS -Wno-unused-macros)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_VARIABLE  -Wno-unused-variable)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_REORDER -Wno-reorder)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_COMMENT -Wno-comment)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_TYPEDEFS -Wno-unused-local-typedefs)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNDEFINED_VAR_TEMPLATE -Wno-undefined-var-template)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_INSTANTIATION_AFTER_SPECIALIZATION -Wno-instantiation-after-specialization)
  add_check_cxx_compiler_flag(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_MISLEADING_INDENTATION    -Wno-misleading-indentation)

elseif(CMAKE_C_COMPILER_ID MATCHES "Intel")

  add_check_c_compiler_flag(C_WARNINGS C_WARN_ALL -Wall)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_POINTER_ARITH -Wpointer-arith)
  add_check_c_compiler_flag(C_WARNINGS C_WARN_NO_UNKNOWN_PRAGMAS -Wno-unknown-pragmas)

  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_ALL -Wall)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_INVALID_OFFSETOF -Wno-invalid-offsetof)
  add_check_cxx_compiler_flag(CXX_WARNINGS CXX_WARN_NO_SIGN_COMPARE -Wno-sign-compare)

  # disable numbered, false positives
  string(APPEND C_WARNINGS " -wd188,186,144,913,556,858,597,177,1292,167,279,592,94,2722,3199")
  string(APPEND CXX_WARNINGS " -wd188,186,144,913,556,858,597,177,1292,167,279,592,94,2722,3199")
elseif(CMAKE_C_COMPILER_ID MATCHES "MSVC")
  # most msvc warnings are C & C++
  set(_WARNINGS
    # warning level:
    "/W3"
    "/w34062"  # switch statement contains 'default' but no 'case' labels
    "/w34115"  # 'type' : named type definition in parentheses
    "/w34189"  # local variable is initialized but not referenced
    # see https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/c5038?view=vs-2017
    "/w35038"  # order of initialization in c++ constructors
    # disable:
    "/wd4018"  # signed/unsigned mismatch
    "/wd4146"  # unary minus operator applied to unsigned type, result still unsigned
    "/wd4065"  # switch statement contains 'default' but no 'case' labels
    "/wd4127"  # conditional expression is constant
    "/wd4181"  # qualifier applied to reference type; ignored
    "/wd4200"  # zero-sized array in struct/union
    "/wd4244"  # conversion from 'type1' to 'type2', possible loss of data
    "/wd4267"  # conversion from 'size_t' to 'type', possible loss of data
    "/wd4305"  # truncation from 'type1' to 'type2'
    "/wd4800"  # forcing value to bool 'true' or 'false'
    "/wd4828"  # The file contains a character that is illegal
    "/wd4996"  # identifier was declared deprecated
    "/wd4661"  # no suitable definition provided for explicit template instantiation request
    "/wd4848"  # 'no_unique_address' is a vendor extension in C++17
    # errors:
    "/we4013"  # 'function' undefined; assuming extern returning int
    "/we4133"  # incompatible pointer types
    "/we4431"  # missing type specifier - int assumed
    "/we4033"  # 'function' must return a value
  )

  string(REPLACE ";" " " _WARNINGS "${_WARNINGS}")
  set(C_WARNINGS "${_WARNINGS}")
  set(CXX_WARNINGS "${_WARNINGS}")
  unset(_WARNINGS)
endif()

# ensure python header is found since detection can fail, this could happen
# with _any_ library but since we used a fixed python version this tends to
# be most problematic.
if(WITH_PYTHON)
  if(NOT EXISTS "${PYTHON_INCLUDE_DIR}/Python.h")
    message(
      FATAL_ERROR
      "Missing: \"${PYTHON_INCLUDE_DIR}/Python.h\",\n"
      "Set the cache entry 'PYTHON_INCLUDE_DIR' to point "
      "to a valid python include path. Containing "
      "Python.h for python version \"${PYTHON_VERSION}\""
    )
  endif()

  if(WIN32)
    # Always use numpy bundled in precompiled libs.
  elseif((WITH_PYTHON_INSTALL AND WITH_PYTHON_INSTALL_NUMPY) OR WITH_PYTHON_NUMPY)
    if(("${PYTHON_NUMPY_PATH}" STREQUAL "") OR (${PYTHON_NUMPY_PATH} MATCHES NOTFOUND))
      find_python_package(numpy "core/include")
    endif()
  endif()

  if(WIN32 OR APPLE)
    # Always copy from precompiled libs.
  elseif(WITH_PYTHON_INSTALL_REQUESTS)
    find_python_package(requests "")
  endif()

  if(WIN32 OR APPLE)
    # Always copy from precompiled libs.
  elseif(WITH_PYTHON_INSTALL_ZSTANDARD)
    find_python_package(zstandard "")
  endif()
endif()

# Select C++17 as the standard for C++ projects.
set(CMAKE_CXX_STANDARD 17)
# If C++17 is not available, downgrading to an earlier standard is NOT OK.
set(CMAKE_CXX_STANDARD_REQUIRED ON)
# Do not enable compiler specific language extensions.
set(CMAKE_CXX_EXTENSIONS OFF)

# Make MSVC properly report the value of the __cplusplus preprocessor macro
# Available MSVC 15.7 (1914) and up, without this it reports 199711L regardless
# of the C++ standard chosen above.
if(MSVC)
  string(APPEND CMAKE_CXX_FLAGS " /Zc:__cplusplus")
endif()

# Visual Studio has all standards it supports available by default
# Clang on windows copies this behavior and does not support these switches
if(
  CMAKE_COMPILER_IS_GNUCC OR
  (CMAKE_C_COMPILER_ID MATCHES "Clang" AND (NOT MSVC)) OR
  (CMAKE_C_COMPILER_ID MATCHES "Intel")
)
  # Use C11 + GNU extensions, works with GCC, Clang, ICC
  string(APPEND CMAKE_C_FLAGS " -std=gnu11")
endif()

if(UNIX AND NOT APPLE)
  if(NOT WITH_CXX11_ABI)
    string(APPEND PLATFORM_CFLAGS " -D_GLIBCXX_USE_CXX11_ABI=0")
  endif()
endif()

if(WITH_COMPILER_SHORT_FILE_MACRO)
  # Use '-fmacro-prefix-map' for Clang and GCC (MSVC doesn't support this).
  add_check_c_compiler_flag(C_PREFIX_MAP_FLAGS C_MACRO_PREFIX_MAP -fmacro-prefix-map=foo=bar)
  add_check_cxx_compiler_flag(CXX_PREFIX_MAP_FLAGS CXX_MACRO_PREFIX_MAP -fmacro-prefix-map=foo=bar)
  if(C_MACRO_PREFIX_MAP AND CXX_MACRO_PREFIX_MAP)
    if(APPLE)
      if(XCODE AND ${XCODE_VERSION} VERSION_LESS 12.0)
      # Developers may have say LLVM Clang-10.0.1 toolchain (which supports the flag)
      # with Xcode-11 (the Clang of which doesn't support the flag).
        message(
          WARNING
          "-fmacro-prefix-map flag is NOT supported by Clang shipped with Xcode-${XCODE_VERSION}."
          " Some Xcode functionality in Product menu may not work. "
          "Disabling WITH_COMPILER_SHORT_FILE_MACRO."
        )
        set(WITH_COMPILER_SHORT_FILE_MACRO OFF)
      endif()
    endif()
    if(WITH_COMPILER_SHORT_FILE_MACRO)
      path_ensure_trailing_slash(_src_dir "${CMAKE_SOURCE_DIR}")
      path_ensure_trailing_slash(_bin_dir "${CMAKE_BINARY_DIR}")
      # Keep this variable so it can be stripped from build-info.
      set(PLATFORM_CFLAGS_FMACRO_PREFIX_MAP
        "-fmacro-prefix-map=\"${_src_dir}\"=\"\" -fmacro-prefix-map=\"${_bin_dir}\"=\"\"")
      string(APPEND PLATFORM_CFLAGS " ${PLATFORM_CFLAGS_FMACRO_PREFIX_MAP}")
      unset(_src_dir)
      unset(_bin_dir)
    endif()
  else()
    message(
      WARNING
      "-fmacro-prefix-map flag is NOT supported by C/C++ compiler."
      " Disabling WITH_COMPILER_SHORT_FILE_MACRO."
    )
    set(WITH_COMPILER_SHORT_FILE_MACRO OFF)
  endif()
endif()

# Include warnings first, so its possible to disable them with user defined flags
# eg: -Wno-uninitialized
set(CMAKE_C_FLAGS "${C_WARNINGS} ${CMAKE_C_FLAGS} ${PLATFORM_CFLAGS}")
set(CMAKE_CXX_FLAGS "${CXX_WARNINGS} ${CMAKE_CXX_FLAGS} ${PLATFORM_CFLAGS}")

# defined above, platform specific but shared names
mark_as_advanced(
  CYCLES_OSL
  OSL_LIB_EXEC
  OSL_COMPILER
  OSL_LIB_COMP
  OSL_LIB_QUERY
  OSL_INCLUDE_DIR
)

mark_as_advanced(
  LLVM_CONFIG
  LLVM_ROOT_DIR
  LLVM_LIBRARY
  LLVM_VERSION
)


# -------------------------------------------------------------------------------
# Global Defines

# better not set includes here but this debugging option is off by default.
if(WITH_CXX_GUARDEDALLOC)
  include_directories(${CMAKE_SOURCE_DIR}/intern/guardedalloc)
  add_definitions(-DWITH_CXX_GUARDEDALLOC)
endif()

if(WITH_ASSERT_ABORT)
  add_definitions(-DWITH_ASSERT_ABORT)
endif()

# message(STATUS "Using CFLAGS: ${CMAKE_C_FLAGS}")
# message(STATUS "Using CXXFLAGS: ${CMAKE_CXX_FLAGS}")


# -----------------------------------------------------------------------------
# Add Sub-Directories

if(WITH_BLENDER)
  add_subdirectory(intern)
  add_subdirectory(extern)

  # source after intern and extern to gather all
  # internal and external library information first, for test linking
  add_subdirectory(source)
elseif(WITH_CYCLES_STANDALONE OR WITH_CYCLES_HYDRA_RENDER_DELEGATE)
  add_subdirectory(intern/guardedalloc)
  add_subdirectory(intern/libc_compat)
  add_subdirectory(intern/sky)

  add_subdirectory(intern/cycles)
  if(WITH_CYCLES_LOGGING)
    if(NOT WITH_SYSTEM_GFLAGS)
      add_subdirectory(extern/gflags)
    endif()
    add_subdirectory(extern/glog)
  endif()
  if(WITH_CUDA_DYNLOAD)
    add_subdirectory(extern/cuew)
  endif()
  if(WITH_HIP_DYNLOAD)
    add_subdirectory(extern/hipew)
  endif()
endif()


# -----------------------------------------------------------------------------
# Add Testing Directory

add_subdirectory(tests)


# -----------------------------------------------------------------------------
# Add Blender Application

if(WITH_BLENDER)
  add_subdirectory(source/creator)
endif()


# -----------------------------------------------------------------------------
# Define 'heavy' sub-modules (for Ninja builder when using pools)
setup_heavy_lib_pool()


# -----------------------------------------------------------------------------
# CPack for generating packages

include(build_files/cmake/packaging.cmake)


# -----------------------------------------------------------------------------
# Use Dynamic Loading for OpenMP

if(WITH_BLENDER)
  openmp_delayload(blender)
endif()


# -----------------------------------------------------------------------------
# Print Final Configuration

if(FIRST_RUN)

  set(_config_msg "\nBlender Configuration\n=====================")

  function(info_cfg_option
    _setting
    )

    set(_msg "  - ${_setting}")
    string(LENGTH "${_msg}" _len)
    while("36" GREATER "${_len}")
      string(APPEND _msg " ")
      math(EXPR _len "${_len} + 1")
    endwhile()

    set(_config_msg "${_config_msg}\n${_msg}${${_setting}}" PARENT_SCOPE)
  endfunction()

  function(info_cfg_text
    _text
    )

    set(_config_msg "${_config_msg}\n\n  ${_text}" PARENT_SCOPE)
  endfunction()

  message(STATUS "C Compiler:   \"${CMAKE_C_COMPILER_ID}\"")
  message(STATUS "C++ Compiler: \"${CMAKE_CXX_COMPILER_ID}\"")

  info_cfg_text("Build Options:")
  info_cfg_option(WITH_ALEMBIC)
  info_cfg_option(WITH_BULLET)
  info_cfg_option(WITH_CLANG)
  info_cfg_option(WITH_CYCLES)
  info_cfg_option(WITH_FFTW3)
  info_cfg_option(WITH_FREESTYLE)
  info_cfg_option(WITH_GMP)
  info_cfg_option(WITH_HARU)
  info_cfg_option(WITH_IK_ITASC)
  info_cfg_option(WITH_IK_SOLVER)
  info_cfg_option(WITH_INPUT_NDOF)
  info_cfg_option(WITH_INPUT_IME)
  info_cfg_option(WITH_INTERNATIONAL)
  info_cfg_option(WITH_OPENCOLLADA)
  info_cfg_option(WITH_OPENCOLORIO)
  info_cfg_option(WITH_OPENIMAGEDENOISE)
  info_cfg_option(WITH_OPENVDB)
  info_cfg_option(WITH_POTRACE)
  info_cfg_option(WITH_PUGIXML)
  info_cfg_option(WITH_QUADRIFLOW)
  info_cfg_option(WITH_TBB)
  info_cfg_option(WITH_USD)
  info_cfg_option(WITH_XR_OPENXR)

  info_cfg_text("Compiler Options:")
  info_cfg_option(WITH_BUILDINFO)
  info_cfg_option(WITH_OPENMP)

  info_cfg_text("System Options:")
  info_cfg_option(WITH_INSTALL_PORTABLE)
  info_cfg_option(WITH_MEM_JEMALLOC)
  info_cfg_option(WITH_MEM_VALGRIND)

  info_cfg_text("GHOST Options:")
  info_cfg_option(WITH_GHOST_DEBUG)
  info_cfg_option(WITH_GHOST_SDL)
  if(UNIX AND NOT APPLE)
    info_cfg_option(WITH_GHOST_X11)
    info_cfg_option(WITH_GHOST_WAYLAND)
    if(WITH_GHOST_X11)
      info_cfg_option(WITH_GHOST_XDND)
      info_cfg_option(WITH_X11_XF86VMODE)
      info_cfg_option(WITH_X11_XFIXES)
      info_cfg_option(WITH_X11_XINPUT)
    endif()
    if(WITH_GHOST_WAYLAND)
      info_cfg_option(WITH_GHOST_WAYLAND_DYNLOAD)
      info_cfg_option(WITH_GHOST_WAYLAND_LIBDECOR)
      info_cfg_option(WITH_GHOST_WAYLAND_DBUS)
    endif()
  endif()

  info_cfg_text("Image Formats:")
  info_cfg_option(WITH_IMAGE_CINEON)
  info_cfg_option(WITH_IMAGE_DDS)
  info_cfg_option(WITH_IMAGE_HDR)
  info_cfg_option(WITH_IMAGE_OPENEXR)
  info_cfg_option(WITH_IMAGE_OPENJPEG)
  info_cfg_option(WITH_IMAGE_TIFF)
  info_cfg_option(WITH_OPENIMAGEIO)

  info_cfg_text("Audio:")
  info_cfg_option(WITH_CODEC_AVI)
  info_cfg_option(WITH_CODEC_FFMPEG)
  info_cfg_option(WITH_CODEC_SNDFILE)
  info_cfg_option(WITH_COREAUDIO)
  info_cfg_option(WITH_JACK)
  info_cfg_option(WITH_JACK_DYNLOAD)
  info_cfg_option(WITH_OPENAL)
  info_cfg_option(WITH_PULSEAUDIO)
  info_cfg_option(WITH_PULSEAUDIO_DYNLOAD)
  info_cfg_option(WITH_SDL)
  info_cfg_option(WITH_SDL_DYNLOAD)
  info_cfg_option(WITH_WASAPI)

  info_cfg_text("Compression:")
  info_cfg_option(WITH_LZMA)
  info_cfg_option(WITH_LZO)

  info_cfg_text("Python:")
  info_cfg_option(WITH_PYTHON_INSTALL)
  info_cfg_option(WITH_PYTHON_INSTALL_NUMPY)
  info_cfg_option(WITH_PYTHON_INSTALL_ZSTANDARD)
  info_cfg_option(WITH_PYTHON_MODULE)
  info_cfg_option(WITH_PYTHON_SAFETY)

  info_cfg_text("Modifiers:")
  info_cfg_option(WITH_MOD_FLUID)
  info_cfg_option(WITH_MOD_OCEANSIM)
  info_cfg_option(WITH_MOD_REMESH)

  if(WITH_CYCLES)
    info_cfg_text("Cycles:")
    info_cfg_option(WITH_CYCLES_OSL)
    info_cfg_option(WITH_CYCLES_EMBREE)
    info_cfg_option(WITH_CYCLES_PATH_GUIDING)
    if(NOT APPLE)
      info_cfg_option(WITH_CYCLES_DEVICE_OPTIX)
      info_cfg_option(WITH_CYCLES_DEVICE_CUDA)
      info_cfg_option(WITH_CYCLES_CUDA_BINARIES)
      info_cfg_option(WITH_CYCLES_DEVICE_HIP)
      info_cfg_option(WITH_CYCLES_HIP_BINARIES)
      info_cfg_option(WITH_CYCLES_DEVICE_ONEAPI)
      info_cfg_option(WITH_CYCLES_ONEAPI_BINARIES)
    endif()
  endif()

  info_cfg_text("")

  message("${_config_msg}")
endif()

if(0)
  print_all_vars()
endif()

# Should be the last step of configuration.
if(POSTCONFIGURE_SCRIPT)
  include(${POSTCONFIGURE_SCRIPT})
endif()