3882e48e8a
!4452 used setting LINK_LIBRARIES and INTERFACE_LINK_LIBRARIES to link components built under ESP-IDF build system. However, LINK_LIBRARIES does not produce behavior same as linking PRIVATE. This MR uses the new signature for target_link_libraries directly instead. This also moves setting dependencies during component registration rather than after all components have been processed. The consequence is that internally, components have to use the new signature form as well. This does not affect linking the components to external targets, such as with idf_as_lib example. This only affects linking additional libraries to ESP-IDF libraries outside component processing (after idf_build_process), which is not even possible for CMake<v3.13 as target_link_libraries is not valid for targets not created in current directory. See https://cmake.org/cmake/help/v3.13/policy/CMP0079.html#policy:CMP0079
102 lines
4.3 KiB
CMake
102 lines
4.3 KiB
CMake
require_idf_targets(esp32)
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if(BOOTLOADER_BUILD)
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# For bootloader, all we need from esp32 is headers
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set(COMPONENT_ADD_INCLUDEDIRS include)
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register_component()
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target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.peripherals.ld")
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else()
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# Regular app build
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set(COMPONENT_SRCS "brownout.c"
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"cache_err_int.c"
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"cache_sram_mmu.c"
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"clk.c"
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"cpu_start.c"
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"crosscore_int.c"
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"dport_access.c"
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"dport_panic_highint_hdl.S"
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"esp_adapter.c"
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"esp_timer_esp32.c"
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"esp_himem.c"
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"gdbstub.c"
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"hw_random.c"
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"int_wdt.c"
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"intr_alloc.c"
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"panic.c"
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"pm_esp32.c"
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"pm_trace.c"
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"reset_reason.c"
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"sleep_modes.c"
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"spiram.c"
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"spiram_psram.c"
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"system_api.c"
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"task_wdt.c")
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set(COMPONENT_ADD_INCLUDEDIRS "include")
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set(COMPONENT_REQUIRES app_update driver esp_event efuse pthread soc) #unfortunately rom/uart uses SOC registers directly
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# driver is a public requirement because esp_sleep.h uses gpio_num_t & touch_pad_t
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# app_update is added here because cpu_start.c uses esp_ota_get_app_description() function.
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set(COMPONENT_PRIV_REQUIRES
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app_trace app_update bootloader_support log mbedtls nvs_flash
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smartconfig_ack spi_flash vfs wpa_supplicant espcoredump esp_common esp_wifi)
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set(COMPONENT_ADD_LDFRAGMENTS linker.lf ld/esp32_fragments.lf)
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register_component()
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target_linker_script(${COMPONENT_LIB} INTERFACE "${CMAKE_CURRENT_BINARY_DIR}/esp32_out.ld")
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# Rely on user code to define app_main
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target_link_libraries(${COMPONENT_LIB} INTERFACE "-u app_main")
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if(CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY)
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# This has to be linked before esp32.project.ld
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target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.extram.bss.ld")
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endif()
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# Process the template file through the linker script generation mechanism, and use the output for linking the
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# final binary
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target_linker_script(${COMPONENT_LIB} INTERFACE "${CMAKE_CURRENT_LIST_DIR}/ld/esp32.project.ld.in"
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PROCESS "${CMAKE_CURRENT_BINARY_DIR}/ld/esp32.project.ld")
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target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.peripherals.ld")
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target_link_libraries(${COMPONENT_LIB} PUBLIC gcc)
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target_link_libraries(${COMPONENT_LIB} INTERFACE "-u call_user_start_cpu0")
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#ld_include_panic_highint_hdl is added as an undefined symbol because otherwise the
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#linker will ignore panic_highint_hdl.S as it has no other files depending on any
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#symbols in it.
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target_link_libraries(${COMPONENT_LIB} INTERFACE "-u ld_include_panic_highint_hdl")
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idf_build_get_property(sdkconfig_header SDKCONFIG_HEADER)
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get_filename_component(config_dir ${sdkconfig_header} DIRECTORY)
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# Preprocess esp32.ld linker script to include configuration, becomes esp32_out.ld
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set(LD_DIR ${CMAKE_CURRENT_SOURCE_DIR}/ld)
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add_custom_command(
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OUTPUT esp32_out.ld
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COMMAND "${CMAKE_C_COMPILER}" -C -P -x c -E -o esp32_out.ld -I ${config_dir} ${LD_DIR}/esp32.ld
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MAIN_DEPENDENCY ${LD_DIR}/esp32.ld ${SDKCONFIG_H}
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COMMENT "Generating linker script..."
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VERBATIM)
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add_custom_target(esp32_linker_script DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/esp32_out.ld)
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add_dependencies(${COMPONENT_LIB} esp32_linker_script)
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# disable stack protection in files which are involved in initialization of that feature
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set_source_files_properties(
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cpu_start.c
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PROPERTIES COMPILE_FLAGS
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-fno-stack-protector)
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if(CONFIG_SPIRAM_CACHE_WORKAROUND)
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# Note: Adding as a PUBLIC compile option here causes this option to propagate to all components that depend on esp32.
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#
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# To handle some corner cases, the same flag is set in project_include.cmake
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target_compile_options(${COMPONENT_LIB} PUBLIC -mfix-esp32-psram-cache-issue)
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# also, make sure we link with this option so correct toolchain libs are pulled in
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target_link_libraries(${COMPONENT_LIB} PUBLIC -mfix-esp32-psram-cache-issue)
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endif()
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endif()
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