CMakeLists.txt

#
# Copyright (c) 2022-2023 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
# 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-util.cmake)

    #
    # ==============================================================================
    # Prepare CHIP configuration based on the project Kconfig configuration
    # ==============================================================================
    # Set paths
    if(NOT CHIP_ROOT)
        get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/../../.. REALPATH)
    endif()

    get_filename_component(GN_ROOT_TARGET ${CHIP_ROOT}/config/zephyr/chip-gn REALPATH)
    get_filename_component(COMMON_CMAKE_SOURCE_DIR ${CHIP_ROOT}/config/common/cmake REALPATH)

    # Get common Cmake sources
    include(${COMMON_CMAKE_SOURCE_DIR}/chip_gn_args.cmake)
    include(${COMMON_CMAKE_SOURCE_DIR}/chip_gn.cmake)

    if(CONFIG_POSIX_API)
        matter_add_flags(-D_DEFAULT_SOURCE)
        matter_add_flags(-isystem${ZEPHYR_BASE}/include/zephyr/posix)
    endif()

    if(CONFIG_MBEDTLS)
        zephyr_include_directories($<TARGET_PROPERTY:mbedTLS,INTERFACE_INCLUDE_DIRECTORIES>)
        zephyr_compile_definitions($<TARGET_PROPERTY:mbedTLS,INTERFACE_COMPILE_DEFINITIONS>)
    endif()

    zephyr_get_compile_flags(ZEPHYR_CFLAGS_C C)
    matter_add_cflags("${ZEPHYR_CFLAGS_C}")
    zephyr_get_compile_flags(ZEPHYR_CFLAGS_CC CXX)
    matter_add_cxxflags("${ZEPHYR_CFLAGS_CC}")
    zephyr_get_gnu_cpp_standard(ZEPHYR_GNU_CPP_STD)
    matter_add_cxxflags("${ZEPHYR_GNU_CPP_STD}")

    # 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()

    # ==============================================================================
    # Generate configuration for CHIP GN build system
    # ==============================================================================
    matter_common_gn_args(
        DEBUG CONFIG_DEBUG
        LIB_SHELL CONFIG_CHIP_LIB_SHELL
        LIB_TESTS CONFIG_CHIP_BUILD_TESTS
        PROJECT_CONFIG ${CONFIG_CHIP_PROJECT_CONFIG}
    )

    matter_add_gn_arg_string("zephyr_ar" ${CMAKE_AR})
    matter_add_gn_arg_string("zephyr_cc" ${CMAKE_C_COMPILER})
    matter_add_gn_arg_string("zephyr_cxx" ${CMAKE_CXX_COMPILER})
    matter_add_gn_arg_bool("chip_logging" CONFIG_LOG)
    matter_add_gn_arg_bool("chip_error_logging" CONFIG_MATTER_LOG_LEVEL GREATER_EQUAL 1)
    matter_add_gn_arg_bool("chip_progress_logging" CONFIG_MATTER_LOG_LEVEL GREATER_EQUAL 3)
    matter_add_gn_arg_bool("chip_detail_logging" CONFIG_MATTER_LOG_LEVEL GREATER_EQUAL 4)
    matter_add_gn_arg_bool("chip_automation_logging" FALSE)
    matter_add_gn_arg_bool("chip_enable_openthread" CONFIG_NET_L2_OPENTHREAD)
    matter_add_gn_arg_bool("chip_openthread_ftd" CONFIG_OPENTHREAD_FTD)
    matter_add_gn_arg_bool("chip_inet_config_enable_ipv4" CONFIG_CHIP_IPV4)
    matter_add_gn_arg_bool("chip_enable_wifi" CONFIG_WIFI)
    matter_add_gn_arg_bool("chip_config_network_layer_ble" CONFIG_BT)
    matter_add_gn_arg_bool("chip_mdns_minimal" CONFIG_WIFI)
    matter_add_gn_arg_bool("chip_mdns_minimal" CONFIG_NET_L2_ETHERNET)
    matter_add_gn_arg_bool("chip_mdns_platform" CONFIG_NET_L2_OPENTHREAD)
    matter_add_gn_arg_bool("chip_inet_config_enable_tcp_endpoint" CONFIG_CHIP_BUILD_TESTS)
    matter_add_gn_arg_bool("chip_malloc_sys_heap" CONFIG_CHIP_MALLOC_SYS_HEAP)
    matter_add_gn_arg_bool("chip_inet_config_enable_tcp_endpoint" FALSE)
    matter_add_gn_arg_bool("chip_enable_read_client" CONFIG_CHIP_ENABLE_READ_CLIENT)

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

    if(CONFIG_CHIP_ENABLE_DNSSD_SRP)
        matter_add_gn_arg_string("chip_mdns" "platform")
    endif()

    if(CONFIG_WIFI)
        matter_add_gn_arg_string("chip_mdns" "minimal")
    elseif(CONFIG_NET_L2_ETHERNET)
        matter_add_gn_arg_string("chip_mdns" "minimal")
    elseif(CONFIG_NET_L2_OPENTHREAD)
        matter_add_gn_arg_string("chip_mdns" "platform")
    else()
        matter_add_gn_arg_string("chip_mdns" "none")
    endif()

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

    matter_generate_args_tmp_file()

    # ==============================================================================
    # Build chip library
    # ==============================================================================
    matter_build(chip
        LIB_SHELL ${CONFIG_CHIP_LIB_SHELL}
        LIB_TESTS ${CONFIG_CHIP_BUILD_TESTS}
        GN_DEPENDENCIES kernel
    )
    set_property(GLOBAL APPEND PROPERTY ZEPHYR_INTERFACE_LIBS chip)
endif() # CONFIG_CHIP