esp-idf/components/esp_system/ld/ld.cmake

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CMake
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2021-04-07 22:27:21 -04:00
# For each supported target, a memory.ld.in and sections.ld.in is processed and dictate the
# memory layout of the app.
#
# memory.ld.in goes through the preprocessor
# sections.ld.in goes through linker script generator
idf_build_get_property(target IDF_TARGET)
idf_build_get_property(sdkconfig_header SDKCONFIG_HEADER)
set(ld_input "${CMAKE_CURRENT_LIST_DIR}/${target}/memory.ld.in")
set(ld_output "${CMAKE_CURRENT_BINARY_DIR}/ld/memory.ld")
target_linker_script(${COMPONENT_LIB} INTERFACE "${ld_output}")
file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/ld")
# Process the template file through the linker script generation mechanism, and use the output for linking the
# final binary
target_linker_script(${COMPONENT_LIB} INTERFACE "${CMAKE_CURRENT_LIST_DIR}/${target}/sections.ld.in"
PROCESS "${CMAKE_CURRENT_BINARY_DIR}/ld/sections.ld")
idf_build_get_property(config_dir CONFIG_DIR)
# Preprocess memory.ld.in linker script to include configuration, becomes memory.ld
add_custom_command(
OUTPUT ${ld_output}
COMMAND "${CMAKE_C_COMPILER}" -C -P -x c -E -o ${ld_output} -I ${config_dir}
-I "${CMAKE_CURRENT_LIST_DIR}" ${ld_input}
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MAIN_DEPENDENCY ${ld_input}
DEPENDS ${sdkconfig_header}
COMMENT "Generating memory.ld linker script..."
VERBATIM)
add_custom_target(memory_ld DEPENDS ${ld_output})
add_dependencies(${COMPONENT_LIB} memory_ld)