esp-idf/components/ulp/component_ulp_common.cmake

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CMake
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if(NOT CMAKE_BUILD_EARLY_EXPANSION)
spaces2list(ULP_S_SOURCES)
foreach(ulp_s_source ${ULP_S_SOURCES})
get_filename_component(ulp_s_source ${ulp_s_source} ABSOLUTE)
list(APPEND ulp_s_sources ${ulp_s_source})
endforeach()
foreach(ulp_s_source ${ulp_s_sources})
get_filename_component(ulp_ps_source ${ulp_s_source} NAME_WE)
set(ulp_ps_output ${CMAKE_CURRENT_BINARY_DIR}/${ULP_APP_NAME}/${ulp_ps_source}.ulp.S)
list(APPEND ulp_ps_sources ${ulp_ps_output})
endforeach()
set(ulp_artifacts_prefix ${CMAKE_CURRENT_BINARY_DIR}/${ULP_APP_NAME}/${ULP_APP_NAME})
set(ulp_artifacts ${ulp_artifacts_prefix}.bin
${ulp_artifacts_prefix}.ld
${ulp_artifacts_prefix}.h)
set(ulp_artifacts_extras ${ulp_artifacts_prefix}.map
${ulp_artifacts_prefix}.sym
${CMAKE_CURRENT_BINARY_DIR}/${ULP_APP_NAME}/esp32.ulp.ld)
# Replace the separator for the list of ULP source files that will be passed to
# the external ULP project. This is a workaround to the bug https://public.kitware.com/Bug/view.php?id=16137.
string(REPLACE ";" "|" ulp_s_sources "${ulp_s_sources}")
externalproject_add(${ULP_APP_NAME}
SOURCE_DIR ${IDF_PATH}/components/ulp/cmake
BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/${ULP_APP_NAME}
INSTALL_COMMAND ""
CMAKE_ARGS -DCMAKE_GENERATOR=${CMAKE_GENERATOR}
-DCMAKE_TOOLCHAIN_FILE=${IDF_PATH}/components/ulp/cmake/toolchain-ulp.cmake
-DULP_S_SOURCES=${ulp_s_sources} -DULP_APP_NAME=${ULP_APP_NAME}
-DCOMPONENT_PATH=${COMPONENT_PATH}
# Even though this resolves to a ';' separated list, this is fine. This must be special behavior
# for generator expressions.
-DCOMPONENT_INCLUDES=$<TARGET_PROPERTY:${COMPONENT_TARGET},INTERFACE_INCLUDE_DIRECTORIES>
-DIDF_PATH=${IDF_PATH}
-DSDKCONFIG=${SDKCONFIG_HEADER}
BUILD_COMMAND ${CMAKE_COMMAND} --build ${CMAKE_CURRENT_BINARY_DIR}/${ULP_APP_NAME} --target build
BUILD_BYPRODUCTS ${ulp_artifacts} ${ulp_artifacts_extras} ${ulp_ps_sources}
${CMAKE_CURRENT_BINARY_DIR}/${ULP_APP_NAME}/${ULP_APP_NAME}
BUILD_ALWAYS 1
LIST_SEPARATOR |
)
spaces2list(ULP_EXP_DEP_SRCS)
set_source_files_properties(${ULP_EXP_DEP_SRCS} PROPERTIES OBJECT_DEPENDS ${ulp_artifacts})
include_directories(${CMAKE_CURRENT_BINARY_DIR}/${ULP_APP_NAME})
add_custom_target(${ULP_APP_NAME}_artifacts DEPENDS ${ULP_APP_NAME})
add_dependencies(${COMPONENT_TARGET} ${ULP_APP_NAME}_artifacts)
target_linker_script(${COMPONENT_TARGET} ${CMAKE_CURRENT_BINARY_DIR}/${ULP_APP_NAME}/${ULP_APP_NAME}.ld)
target_add_binary_data(${COMPONENT_TARGET} ${CMAKE_CURRENT_BINARY_DIR}/${ULP_APP_NAME}/${ULP_APP_NAME}.bin BINARY)
endif()