config/nrfconnect/chip-module/CMakeLists.txt - third_party/github/project-chip/connectedhomeip - Git at Google

 #
 #   Copyright (c) 2020 Project CHIP Authors
 #
 #   Licensed under the Apache License, Version 2.0 (the "License");
 #   you may not use this file except in compliance with the License.
 #   You may obtain a copy of the License at
 #
 #       http://www.apache.org/licenses/LICENSE-2.0
 #
 #   Unless required by applicable law or agreed to in writing, software
 #   distributed under the License is distributed on an "AS IS" BASIS,
 #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #   See the License for the specific language governing permissions and
 #   limitations under the License.
 #

 #
 #   @file
 #     CMake sub-project defining 'chip' target which represents CHIP library
 #     and other optional libraries like unit tests, built with 'nrfconnect'
 #     platform.
 #     Since CHIP doesn't provide native CMake support, ExternalProject
 #     module is used to build the required artifacts with GN meta-build
 #     system. It is assumed that find_package(Zephyr) has been called before
 #     including this file.
 #

 if (CONFIG_CHIP)

 include(ExternalProject)
 include(../../zephyr/ota-image.cmake)
 include(../../zephyr/zephyr-util.cmake)
 include(generate_factory_data.cmake)

 # ==============================================================================
 # Declare configuration variables and define constants
 # ==============================================================================

 # C/C++ compiler flags passed to CHIP build system
 list(APPEND CHIP_CFLAGS)

 # C compiler flags passed to CHIP build system
 list(APPEND CHIP_CFLAGS_C)

 # C++ compiler flags passed to CHIP build system
 list(APPEND CHIP_CFLAGS_CC)

 # CHIP libraries that the application should be linked with
 list(APPEND CHIP_LIBRARIES)

 # GN meta-build system arguments passed to the make_gn_args.py script
 string(APPEND CHIP_GN_ARGS)

 # ==============================================================================
 # Helper macros
 # ==============================================================================

 macro(chip_gn_arg_import FILE)
     string(APPEND CHIP_GN_ARGS "--module\n${FILE}\n")
 endmacro()

 macro(chip_gn_arg_string ARG STRING)
     string(APPEND CHIP_GN_ARGS "--arg-string\n${ARG}\n${STRING}\n")
 endmacro()

 macro(chip_gn_arg_bool ARG)
     if (${ARGN})
         string(APPEND CHIP_GN_ARGS "--arg\n${ARG}\ntrue\n")
     else()
         string(APPEND CHIP_GN_ARGS "--arg\n${ARG}\nfalse\n")
     endif()
 endmacro()

 macro(chip_gn_arg_cflags ARG CFLAGS)
     string(APPEND CHIP_GN_ARGS "--arg-cflags\n${ARG}\n${CFLAGS}\n")
 endmacro()

 macro(chip_gn_arg ARG VALUE)
     string(APPEND CHIP_GN_ARGS "--arg\n${ARG}\n${VALUE}\n")
 endmacro()

 # ==============================================================================
 # Prepare CHIP configuration based on the project Kconfig configuration
 # ==============================================================================

 if (NOT CHIP_ROOT)
     get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/../../.. REALPATH)
 endif()

 set(CHIP_LIB_DIR ${CMAKE_CURRENT_BINARY_DIR}/lib)
 set(CHIP_GN_ROOT_TARGET ${CHIP_ROOT}/config/nrfconnect/chip-gn)

 # Prepare compiler flags

 if (CONFIG_ARM)
     list(APPEND CHIP_CFLAGS_C
         --specs=nosys.specs
     )
 endif()

 if (CONFIG_POSIX_API)
     list(APPEND CHIP_CFLAGS
         -D_SYS__PTHREADTYPES_H_
         -isystem${ZEPHYR_BASE}/include/zephyr/posix
     )
 endif()

 if (CONFIG_NORDIC_SECURITY_BACKEND)
     zephyr_include_directories($<TARGET_PROPERTY:mbedtls_external,INTERFACE_INCLUDE_DIRECTORIES>)
     zephyr_include_directories($<TARGET_PROPERTY:mbedcrypto_common,INTERFACE_INCLUDE_DIRECTORIES>)
     if(TARGET platform_cc3xx)
         zephyr_include_directories($<TARGET_PROPERTY:platform_cc3xx,INTERFACE_INCLUDE_DIRECTORIES>)
     endif()
     list(APPEND CHIP_CFLAGS -DMBEDTLS_CONFIG_FILE=<nrf-config.h>)
 endif()

 if (CONFIG_NRF_802154_RADIO_DRIVER)
     zephyr_include_directories($<TARGET_PROPERTY:nrf-802154-driver-interface,INTERFACE_INCLUDE_DIRECTORIES>)
 endif()

 zephyr_get_compile_flags(CHIP_CFLAGS_C C)
 zephyr_get_compile_flags(CHIP_CFLAGS_CC CXX)
 zephyr_get_gnu_cpp_standard(CHIP_CFLAGS_CC)

 convert_list_of_flags_to_string_of_flags(CHIP_CFLAGS CHIP_CFLAGS)
 convert_list_of_flags_to_string_of_flags(CHIP_CFLAGS_C CHIP_CFLAGS_C)
 convert_list_of_flags_to_string_of_flags(CHIP_CFLAGS_CC CHIP_CFLAGS_CC)

 # Prepare CHIP libraries that the application should be linked with

 if (NOT CHIP_LIBRARIES)
     set(CHIP_LIBRARIES -lCHIP)
 endif()

 if (CONFIG_CHIP_EXAMPLE_DEVICE_INFO_PROVIDER)
     list(APPEND CHIP_LIBRARIES -lMatterDeviceInfoProviderExample)
 endif()

 list(TRANSFORM CHIP_LIBRARIES REPLACE
     "-l(.*)"
     "${CHIP_LIB_DIR}/lib\\1.a"
 )

 # Set up CHIP project configuration file

 if (CONFIG_CHIP_PROJECT_CONFIG)
     get_filename_component(CHIP_PROJECT_CONFIG
         ${CONFIG_CHIP_PROJECT_CONFIG}
         REALPATH
         BASE_DIR ${CMAKE_SOURCE_DIR}
     )
     set(CHIP_PROJECT_CONFIG "<${CHIP_PROJECT_CONFIG}>")
 else()
     set(CHIP_PROJECT_CONFIG "")
 endif()

 # Set up custom OpenThread configuration

 if (CONFIG_CHIP_OPENTHREAD_CONFIG)
     get_filename_component(CHIP_OPENTHREAD_CONFIG
         ${CONFIG_CHIP_OPENTHREAD_CONFIG}
         REALPATH
         BASE_DIR ${CMAKE_SOURCE_DIR}
     )
     zephyr_set_openthread_config(${CHIP_OPENTHREAD_CONFIG})
 endif()

 # Set up Zephyr symbol level

 if (NOT CONFIG_CHIP_DEBUG_SYMBOLS)
     set_compiler_property(PROPERTY debug -g0)
 endif()

 # Determine if ccache should be used

 get_property(CHIP_COMPILER_LAUNCHER GLOBAL PROPERTY RULE_LAUNCH_COMPILE)

 # Find required programs

 find_package(Python3 REQUIRED)
 find_program(GN_EXECUTABLE gn REQUIRED)

 # Parse the 'gn --version' output to find the installed version.

 set(MIN_GN_VERSION 1851)
 execute_process(
     COMMAND ${GN_EXECUTABLE} --version
     OUTPUT_VARIABLE GN_VERSION
     COMMAND_ERROR_IS_FATAL ANY
 )
 if (GN_VERSION VERSION_LESS MIN_GN_VERSION)
     message(FATAL_ERROR "Found unsupported version of gn: ${MIN_GN_VERSION}+ is required")
 endif()

 # ==============================================================================
 # Generate configuration for CHIP GN build system
 # ==============================================================================

 chip_gn_arg_cflags("target_cflags"                          ${CHIP_CFLAGS})
 chip_gn_arg_cflags("target_cflags_c"                        ${CHIP_CFLAGS_C})
 chip_gn_arg_cflags("target_cflags_cc"                       ${CHIP_CFLAGS_CC})
 chip_gn_arg_string("zephyr_ar"                              ${CMAKE_AR})
 chip_gn_arg_string("zephyr_cc"                              ${CMAKE_C_COMPILER})
 chip_gn_arg_string("zephyr_cxx"                             ${CMAKE_CXX_COMPILER})
 chip_gn_arg_bool  ("is_debug"                               CONFIG_DEBUG)
 chip_gn_arg_bool  ("chip_logging"                           CONFIG_LOG)
 chip_gn_arg_bool  ("chip_enable_openthread"                 CONFIG_NET_L2_OPENTHREAD)
 chip_gn_arg_bool  ("chip_openthread_ftd"                    CONFIG_OPENTHREAD_FTD)
 chip_gn_arg_bool  ("chip_config_network_layer_ble"          CONFIG_BT)
 chip_gn_arg_bool  ("chip_inet_config_enable_ipv4"           CONFIG_NET_IPV4)
 chip_gn_arg_bool  ("chip_enable_nfc"                        CONFIG_CHIP_NFC_COMMISSIONING)
 chip_gn_arg_bool  ("chip_enable_ota_requestor"              CONFIG_CHIP_OTA_REQUESTOR)
 chip_gn_arg_bool  ("chip_build_tests"                       CONFIG_CHIP_BUILD_TESTS)
 chip_gn_arg_bool  ("chip_monolithic_tests"                  CONFIG_CHIP_BUILD_TESTS)
 chip_gn_arg_bool  ("chip_inet_config_enable_tcp_endpoint"   CONFIG_CHIP_BUILD_TESTS)
 chip_gn_arg_bool  ("chip_build_libshell"                    CONFIG_CHIP_LIB_SHELL)
 chip_gn_arg_bool  ("chip_error_logging"                     CONFIG_MATTER_LOG_LEVEL GREATER_EQUAL 1)
 chip_gn_arg_bool  ("chip_progress_logging"                  CONFIG_MATTER_LOG_LEVEL GREATER_EQUAL 3)
 chip_gn_arg_bool  ("chip_detail_logging"                    CONFIG_MATTER_LOG_LEVEL GREATER_EQUAL 4)
 chip_gn_arg_bool  ("chip_automation_logging"                FALSE)
 chip_gn_arg_bool  ("chip_malloc_sys_heap"                   CONFIG_CHIP_MALLOC_SYS_HEAP)
 chip_gn_arg_bool  ("chip_enable_wifi"                       CONFIG_WIFI_NRF700X)

 if (CONFIG_CHIP_FACTORY_DATA)
     chip_gn_arg_bool("chip_use_transitional_commissionable_data_provider" FALSE)
     chip_gn_arg_bool("chip_enable_factory_data"                           TRUE)
 elseif (CONFIG_CHIP_FACTORY_DATA_CUSTOM_BACKEND)
     chip_gn_arg_bool("chip_use_transitional_commissionable_data_provider" FALSE)
 endif()

 if (CONFIG_CHIP_ROTATING_DEVICE_ID)
     chip_gn_arg_bool("chip_enable_rotating_device_id"          TRUE)
     chip_gn_arg_bool("chip_enable_additional_data_advertising" TRUE)
 endif()

 if (CONFIG_NET_L2_OPENTHREAD)
     chip_gn_arg_string("chip_mdns" "platform")
 elseif(CONFIG_WIFI_NRF700X)
     chip_gn_arg_string("chip_mdns" "minimal")
 else()
     chip_gn_arg_string("chip_mdns" "none")
 endif()

 if (CONFIG_CHIP_CRYPTO_PSA)
     chip_gn_arg_string("chip_crypto" "psa")
 endif()

 if (CHIP_PROJECT_CONFIG)
     chip_gn_arg_string("chip_project_config_include"        ${CHIP_PROJECT_CONFIG})
     chip_gn_arg_string("chip_system_project_config_include" ${CHIP_PROJECT_CONFIG})
 endif()

 if (BOARD STREQUAL "native_posix")
     chip_gn_arg_string("target_cpu" "x86")
 elseif (BOARD STREQUAL "native_posix_64")
     chip_gn_arg_string("target_cpu" "x64")
 endif()

 if (NOT CONFIG_CHIP_DEBUG_SYMBOLS)
     chip_gn_arg_string("symbol_level" "0")
 endif()

 if (CHIP_COMPILER_LAUNCHER)
     chip_gn_arg_string("pw_command_launcher" ${CHIP_COMPILER_LAUNCHER})
 endif()

 if (CONFIG_CHIP_PW_RPC)
     set(PIGWEED_DIR "//third_party/pigweed/repo")
     chip_gn_arg_string("pw_assert_BACKEND" ${PIGWEED_DIR}/pw_assert_log:check_backend)
     chip_gn_arg_string("pw_log_BACKEND" ${PIGWEED_DIR}/pw_log_basic)
     chip_gn_arg("pw_build_LINK_DEPS" [\"${PIGWEED_DIR}/pw_assert:impl\",\ \"${PIGWEED_DIR}/pw_log:impl\"])
 endif()

 if (CONFIG_CHIP_EXAMPLE_DEVICE_INFO_PROVIDER)
     chip_gn_arg_bool("chip_build_example_providers" TRUE)
 endif()

 file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/args.tmp" CONTENT ${CHIP_GN_ARGS})

 # ==============================================================================
 # Define 'chip-gn' target that builds CHIP library(ies) with GN build system
 # ==============================================================================
 ExternalProject_Add(
     chip-gn
     PREFIX                  ${CMAKE_CURRENT_BINARY_DIR}
     SOURCE_DIR              ${CHIP_ROOT}
     BINARY_DIR              ${CMAKE_CURRENT_BINARY_DIR}
     CONFIGURE_COMMAND       ""
     BUILD_COMMAND           ${Python3_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/make_gn_args.py
                                 @args.tmp > args.gn &&
                             ${GN_EXECUTABLE}
                                 --root=${CHIP_ROOT}
                                 --root-target=${CHIP_GN_ROOT_TARGET}
                                 --dotfile=${CHIP_GN_ROOT_TARGET}/.gn
                                 --script-executable=${Python3_EXECUTABLE}
                                 --export-compile-commands
                                 gen --check --fail-on-unused-args . &&
                             ninja
     INSTALL_COMMAND         ""
     BUILD_BYPRODUCTS        ${CHIP_LIBRARIES}
     BUILD_ALWAYS            TRUE
     USES_TERMINAL_BUILD     TRUE
 )
 add_dependencies(chip-gn kernel)

 # ==============================================================================
 # Define 'chip' target that exposes CHIP headers & libraries to the application
 # ==============================================================================

 zephyr_interface_library_named(chip)
 target_compile_definitions(chip INTERFACE CHIP_HAVE_CONFIG_H)
 target_include_directories(chip INTERFACE
     ${CHIP_ROOT}/src
     ${CHIP_ROOT}/src/include
     ${CHIP_ROOT}/third_party/nlassert/repo/include
     ${CHIP_ROOT}/third_party/nlio/repo/include
     ${CHIP_ROOT}/zzz_generated/app-common
     ${CMAKE_CURRENT_BINARY_DIR}/gen/include
 )

 if (CONFIG_CHIP_EXAMPLE_DEVICE_INFO_PROVIDER)
     target_include_directories(chip INTERFACE ${CHIP_ROOT}/examples/providers)
 endif()

 if (CONFIG_CHIP_LIB_SHELL)
     target_link_options(chip INTERFACE -Wl,--whole-archive ${CHIP_LIB_DIR}/libCHIPShell.a -Wl,--no-whole-archive)
 endif()

 if (CONFIG_CHIP_BUILD_TESTS)
     target_link_options(chip INTERFACE -Wl,--whole-archive ${CHIP_LIB_DIR}/libCHIP_tests.a -Wl,--no-whole-archive)
 endif()

 if (CONFIG_CHIP_MALLOC_SYS_HEAP_OVERRIDE)
     target_link_options(chip INTERFACE
         -Wl,--wrap=malloc
         -Wl,--wrap=calloc
         -Wl,--wrap=realloc
         -Wl,--wrap=free
         -Wl,--wrap=_malloc_r
         -Wl,--wrap=_calloc_r
         -Wl,--wrap=_realloc_r
         -Wl,--wrap=_free_r
     )
 endif()

 target_link_libraries(chip INTERFACE -Wl,--start-group ${CHIP_LIBRARIES} -Wl,--end-group)

 add_dependencies(chip chip-gn)

 # ==============================================================================
 # Define 'chip-ota-image' target for building CHIP OTA image
 # ==============================================================================

 if (CONFIG_CHIP_OTA_IMAGE_BUILD)
     chip_ota_image(chip-ota-image
         INPUT_FILES ${PROJECT_BINARY_DIR}/dfu_multi_image.bin
         OUTPUT_FILE ${PROJECT_BINARY_DIR}/${CONFIG_CHIP_OTA_IMAGE_FILE_NAME}
     )
 endif()

 # ==============================================================================
 # Define 'factory_data' target for generating a factory data partition
 # ==============================================================================

 if (CONFIG_CHIP_FACTORY_DATA_BUILD)
     nrfconnect_generate_factory_data()
 endif()

 endif() # CONFIG_CHIP
	#
	# Copyright (c) 2020 Project CHIP Authors
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	#

	#
	# @file
	# CMake sub-project defining 'chip' target which represents CHIP library
	# and other optional libraries like unit tests, built with 'nrfconnect'
	# platform.
	# Since CHIP doesn't provide native CMake support, ExternalProject
	# module is used to build the required artifacts with GN meta-build
	# system. It is assumed that find_package(Zephyr) has been called before
	# including this file.
	#

	if (CONFIG_CHIP)

	include(ExternalProject)
	include(../../zephyr/ota-image.cmake)
	include(../../zephyr/zephyr-util.cmake)
	include(generate_factory_data.cmake)

	# ==============================================================================
	# Declare configuration variables and define constants
	# ==============================================================================

	# C/C++ compiler flags passed to CHIP build system
	list(APPEND CHIP_CFLAGS)

	# C compiler flags passed to CHIP build system
	list(APPEND CHIP_CFLAGS_C)

	# C++ compiler flags passed to CHIP build system
	list(APPEND CHIP_CFLAGS_CC)

	# CHIP libraries that the application should be linked with
	list(APPEND CHIP_LIBRARIES)

	# GN meta-build system arguments passed to the make_gn_args.py script
	string(APPEND CHIP_GN_ARGS)

	# ==============================================================================
	# Helper macros
	# ==============================================================================

	macro(chip_gn_arg_import FILE)
	string(APPEND CHIP_GN_ARGS "--module\n${FILE}\n")
	endmacro()

	macro(chip_gn_arg_string ARG STRING)
	string(APPEND CHIP_GN_ARGS "--arg-string\n${ARG}\n${STRING}\n")
	endmacro()

	macro(chip_gn_arg_bool ARG)
	if (${ARGN})
	string(APPEND CHIP_GN_ARGS "--arg\n${ARG}\ntrue\n")
	else()
	string(APPEND CHIP_GN_ARGS "--arg\n${ARG}\nfalse\n")
	endif()
	endmacro()

	macro(chip_gn_arg_cflags ARG CFLAGS)
	string(APPEND CHIP_GN_ARGS "--arg-cflags\n${ARG}\n${CFLAGS}\n")
	endmacro()

	macro(chip_gn_arg ARG VALUE)
	string(APPEND CHIP_GN_ARGS "--arg\n${ARG}\n${VALUE}\n")
	endmacro()

	# ==============================================================================
	# Prepare CHIP configuration based on the project Kconfig configuration
	# ==============================================================================

	if (NOT CHIP_ROOT)
	get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/../../.. REALPATH)
	endif()

	set(CHIP_LIB_DIR ${CMAKE_CURRENT_BINARY_DIR}/lib)
	set(CHIP_GN_ROOT_TARGET ${CHIP_ROOT}/config/nrfconnect/chip-gn)

	# Prepare compiler flags

	if (CONFIG_ARM)
	list(APPEND CHIP_CFLAGS_C
	--specs=nosys.specs
	)
	endif()

	if (CONFIG_POSIX_API)
	list(APPEND CHIP_CFLAGS
	-D_SYS__PTHREADTYPES_H_
	-isystem${ZEPHYR_BASE}/include/zephyr/posix
	)
	endif()

	if (CONFIG_NORDIC_SECURITY_BACKEND)
	zephyr_include_directories($<TARGET_PROPERTY:mbedtls_external,INTERFACE_INCLUDE_DIRECTORIES>)
	zephyr_include_directories($<TARGET_PROPERTY:mbedcrypto_common,INTERFACE_INCLUDE_DIRECTORIES>)
	if(TARGET platform_cc3xx)
	zephyr_include_directories($<TARGET_PROPERTY:platform_cc3xx,INTERFACE_INCLUDE_DIRECTORIES>)
	endif()
	list(APPEND CHIP_CFLAGS -DMBEDTLS_CONFIG_FILE=<nrf-config.h>)
	endif()

	if (CONFIG_NRF_802154_RADIO_DRIVER)
	zephyr_include_directories($<TARGET_PROPERTY:nrf-802154-driver-interface,INTERFACE_INCLUDE_DIRECTORIES>)
	endif()

	zephyr_get_compile_flags(CHIP_CFLAGS_C C)
	zephyr_get_compile_flags(CHIP_CFLAGS_CC CXX)
	zephyr_get_gnu_cpp_standard(CHIP_CFLAGS_CC)

	convert_list_of_flags_to_string_of_flags(CHIP_CFLAGS CHIP_CFLAGS)
	convert_list_of_flags_to_string_of_flags(CHIP_CFLAGS_C CHIP_CFLAGS_C)
	convert_list_of_flags_to_string_of_flags(CHIP_CFLAGS_CC CHIP_CFLAGS_CC)

	# Prepare CHIP libraries that the application should be linked with

	if (NOT CHIP_LIBRARIES)
	set(CHIP_LIBRARIES -lCHIP)
	endif()

	if (CONFIG_CHIP_EXAMPLE_DEVICE_INFO_PROVIDER)
	list(APPEND CHIP_LIBRARIES -lMatterDeviceInfoProviderExample)
	endif()

	list(TRANSFORM CHIP_LIBRARIES REPLACE
	"-l(.*)"
	"${CHIP_LIB_DIR}/lib\\1.a"
	)

	# Set up CHIP project configuration file

	if (CONFIG_CHIP_PROJECT_CONFIG)
	get_filename_component(CHIP_PROJECT_CONFIG
	${CONFIG_CHIP_PROJECT_CONFIG}
	REALPATH
	BASE_DIR ${CMAKE_SOURCE_DIR}
	)
	set(CHIP_PROJECT_CONFIG "<${CHIP_PROJECT_CONFIG}>")
	else()
	set(CHIP_PROJECT_CONFIG "")
	endif()

	# Set up custom OpenThread configuration

	if (CONFIG_CHIP_OPENTHREAD_CONFIG)
	get_filename_component(CHIP_OPENTHREAD_CONFIG
	${CONFIG_CHIP_OPENTHREAD_CONFIG}
	REALPATH
	BASE_DIR ${CMAKE_SOURCE_DIR}
	)
	zephyr_set_openthread_config(${CHIP_OPENTHREAD_CONFIG})
	endif()

	# Set up Zephyr symbol level

	if (NOT CONFIG_CHIP_DEBUG_SYMBOLS)
	set_compiler_property(PROPERTY debug -g0)
	endif()

	# Determine if ccache should be used

	get_property(CHIP_COMPILER_LAUNCHER GLOBAL PROPERTY RULE_LAUNCH_COMPILE)

	# Find required programs

	find_package(Python3 REQUIRED)
	find_program(GN_EXECUTABLE gn REQUIRED)

	# Parse the 'gn --version' output to find the installed version.

	set(MIN_GN_VERSION 1851)
	execute_process(
	COMMAND ${GN_EXECUTABLE} --version
	OUTPUT_VARIABLE GN_VERSION
	COMMAND_ERROR_IS_FATAL ANY
	)
	if (GN_VERSION VERSION_LESS MIN_GN_VERSION)
	message(FATAL_ERROR "Found unsupported version of gn: ${MIN_GN_VERSION}+ is required")
	endif()

	# ==============================================================================
	# Generate configuration for CHIP GN build system
	# ==============================================================================

	chip_gn_arg_cflags("target_cflags" ${CHIP_CFLAGS})
	chip_gn_arg_cflags("target_cflags_c" ${CHIP_CFLAGS_C})
	chip_gn_arg_cflags("target_cflags_cc" ${CHIP_CFLAGS_CC})
	chip_gn_arg_string("zephyr_ar" ${CMAKE_AR})
	chip_gn_arg_string("zephyr_cc" ${CMAKE_C_COMPILER})
	chip_gn_arg_string("zephyr_cxx" ${CMAKE_CXX_COMPILER})
	chip_gn_arg_bool ("is_debug" CONFIG_DEBUG)
	chip_gn_arg_bool ("chip_logging" CONFIG_LOG)
	chip_gn_arg_bool ("chip_enable_openthread" CONFIG_NET_L2_OPENTHREAD)
	chip_gn_arg_bool ("chip_openthread_ftd" CONFIG_OPENTHREAD_FTD)
	chip_gn_arg_bool ("chip_config_network_layer_ble" CONFIG_BT)
	chip_gn_arg_bool ("chip_inet_config_enable_ipv4" CONFIG_NET_IPV4)
	chip_gn_arg_bool ("chip_enable_nfc" CONFIG_CHIP_NFC_COMMISSIONING)
	chip_gn_arg_bool ("chip_enable_ota_requestor" CONFIG_CHIP_OTA_REQUESTOR)
	chip_gn_arg_bool ("chip_build_tests" CONFIG_CHIP_BUILD_TESTS)
	chip_gn_arg_bool ("chip_monolithic_tests" CONFIG_CHIP_BUILD_TESTS)
	chip_gn_arg_bool ("chip_inet_config_enable_tcp_endpoint" CONFIG_CHIP_BUILD_TESTS)
	chip_gn_arg_bool ("chip_build_libshell" CONFIG_CHIP_LIB_SHELL)
	chip_gn_arg_bool ("chip_error_logging" CONFIG_MATTER_LOG_LEVEL GREATER_EQUAL 1)
	chip_gn_arg_bool ("chip_progress_logging" CONFIG_MATTER_LOG_LEVEL GREATER_EQUAL 3)
	chip_gn_arg_bool ("chip_detail_logging" CONFIG_MATTER_LOG_LEVEL GREATER_EQUAL 4)
	chip_gn_arg_bool ("chip_automation_logging" FALSE)
	chip_gn_arg_bool ("chip_malloc_sys_heap" CONFIG_CHIP_MALLOC_SYS_HEAP)
	chip_gn_arg_bool ("chip_enable_wifi" CONFIG_WIFI_NRF700X)

	if (CONFIG_CHIP_FACTORY_DATA)
	chip_gn_arg_bool("chip_use_transitional_commissionable_data_provider" FALSE)
	chip_gn_arg_bool("chip_enable_factory_data" TRUE)
	elseif (CONFIG_CHIP_FACTORY_DATA_CUSTOM_BACKEND)
	chip_gn_arg_bool("chip_use_transitional_commissionable_data_provider" FALSE)
	endif()

	if (CONFIG_CHIP_ROTATING_DEVICE_ID)
	chip_gn_arg_bool("chip_enable_rotating_device_id" TRUE)
	chip_gn_arg_bool("chip_enable_additional_data_advertising" TRUE)
	endif()

	if (CONFIG_NET_L2_OPENTHREAD)
	chip_gn_arg_string("chip_mdns" "platform")
	elseif(CONFIG_WIFI_NRF700X)
	chip_gn_arg_string("chip_mdns" "minimal")
	else()
	chip_gn_arg_string("chip_mdns" "none")
	endif()

	if (CONFIG_CHIP_CRYPTO_PSA)
	chip_gn_arg_string("chip_crypto" "psa")
	endif()

	if (CHIP_PROJECT_CONFIG)
	chip_gn_arg_string("chip_project_config_include" ${CHIP_PROJECT_CONFIG})
	chip_gn_arg_string("chip_system_project_config_include" ${CHIP_PROJECT_CONFIG})
	endif()

	if (BOARD STREQUAL "native_posix")
	chip_gn_arg_string("target_cpu" "x86")
	elseif (BOARD STREQUAL "native_posix_64")
	chip_gn_arg_string("target_cpu" "x64")
	endif()

	if (NOT CONFIG_CHIP_DEBUG_SYMBOLS)
	chip_gn_arg_string("symbol_level" "0")
	endif()

	if (CHIP_COMPILER_LAUNCHER)
	chip_gn_arg_string("pw_command_launcher" ${CHIP_COMPILER_LAUNCHER})
	endif()

	if (CONFIG_CHIP_PW_RPC)
	set(PIGWEED_DIR "//third_party/pigweed/repo")
	chip_gn_arg_string("pw_assert_BACKEND" ${PIGWEED_DIR}/pw_assert_log:check_backend)
	chip_gn_arg_string("pw_log_BACKEND" ${PIGWEED_DIR}/pw_log_basic)
	chip_gn_arg("pw_build_LINK_DEPS" [\"${PIGWEED_DIR}/pw_assert:impl\",\ \"${PIGWEED_DIR}/pw_log:impl\"])
	endif()

	if (CONFIG_CHIP_EXAMPLE_DEVICE_INFO_PROVIDER)
	chip_gn_arg_bool("chip_build_example_providers" TRUE)
	endif()

	file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/args.tmp" CONTENT ${CHIP_GN_ARGS})

	# ==============================================================================
	# Define 'chip-gn' target that builds CHIP library(ies) with GN build system
	# ==============================================================================
	ExternalProject_Add(
	chip-gn
	PREFIX ${CMAKE_CURRENT_BINARY_DIR}
	SOURCE_DIR ${CHIP_ROOT}
	BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}
	CONFIGURE_COMMAND ""
	BUILD_COMMAND ${Python3_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/make_gn_args.py
	@args.tmp > args.gn &&
	${GN_EXECUTABLE}
	--root=${CHIP_ROOT}
	--root-target=${CHIP_GN_ROOT_TARGET}
	--dotfile=${CHIP_GN_ROOT_TARGET}/.gn
	--script-executable=${Python3_EXECUTABLE}
	--export-compile-commands
	gen --check --fail-on-unused-args . &&
	ninja
	INSTALL_COMMAND ""
	BUILD_BYPRODUCTS ${CHIP_LIBRARIES}
	BUILD_ALWAYS TRUE
	USES_TERMINAL_BUILD TRUE
	)
	add_dependencies(chip-gn kernel)

	# ==============================================================================
	# Define 'chip' target that exposes CHIP headers & libraries to the application
	# ==============================================================================

	zephyr_interface_library_named(chip)
	target_compile_definitions(chip INTERFACE CHIP_HAVE_CONFIG_H)
	target_include_directories(chip INTERFACE
	${CHIP_ROOT}/src
	${CHIP_ROOT}/src/include
	${CHIP_ROOT}/third_party/nlassert/repo/include
	${CHIP_ROOT}/third_party/nlio/repo/include
	${CHIP_ROOT}/zzz_generated/app-common
	${CMAKE_CURRENT_BINARY_DIR}/gen/include
	)

	if (CONFIG_CHIP_EXAMPLE_DEVICE_INFO_PROVIDER)
	target_include_directories(chip INTERFACE ${CHIP_ROOT}/examples/providers)
	endif()

	if (CONFIG_CHIP_LIB_SHELL)
	target_link_options(chip INTERFACE -Wl,--whole-archive ${CHIP_LIB_DIR}/libCHIPShell.a -Wl,--no-whole-archive)
	endif()

	if (CONFIG_CHIP_BUILD_TESTS)
	target_link_options(chip INTERFACE -Wl,--whole-archive ${CHIP_LIB_DIR}/libCHIP_tests.a -Wl,--no-whole-archive)
	endif()

	if (CONFIG_CHIP_MALLOC_SYS_HEAP_OVERRIDE)
	target_link_options(chip INTERFACE
	-Wl,--wrap=malloc
	-Wl,--wrap=calloc
	-Wl,--wrap=realloc
	-Wl,--wrap=free
	-Wl,--wrap=_malloc_r
	-Wl,--wrap=_calloc_r
	-Wl,--wrap=_realloc_r
	-Wl,--wrap=_free_r
	)
	endif()

	target_link_libraries(chip INTERFACE -Wl,--start-group ${CHIP_LIBRARIES} -Wl,--end-group)

	add_dependencies(chip chip-gn)

	# ==============================================================================
	# Define 'chip-ota-image' target for building CHIP OTA image
	# ==============================================================================

	if (CONFIG_CHIP_OTA_IMAGE_BUILD)
	chip_ota_image(chip-ota-image
	INPUT_FILES ${PROJECT_BINARY_DIR}/dfu_multi_image.bin
	OUTPUT_FILE ${PROJECT_BINARY_DIR}/${CONFIG_CHIP_OTA_IMAGE_FILE_NAME}
	)
	endif()

	# ==============================================================================
	# Define 'factory_data' target for generating a factory data partition
	# ==============================================================================

	if (CONFIG_CHIP_FACTORY_DATA_BUILD)
	nrfconnect_generate_factory_data()
	endif()

	endif() # CONFIG_CHIP