idf_build_get_property(target IDF_TARGET) if(NOT "${target}" STREQUAL "esp32") return() endif() idf_build_get_property(sdkconfig_header SDKCONFIG_HEADER) if(BOOTLOADER_BUILD) # For bootloader, all we need from esp32 is headers idf_component_register(INCLUDE_DIRS include) target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.peripherals.ld") else() # Regular app build set(srcs "cache_err_int.c" "cache_sram_mmu.c" "clk.c" "cpu_start.c" "crosscore_int.c" "dport_access.c" "esp_himem.c" "hw_random.c" "int_wdt.c" "intr_alloc.c" "pm_esp32.c" "pm_trace.c" "sleep_modes.c" "spiram.c" "spiram_psram.c" "system_api_esp32.c" "task_wdt.c") set(include_dirs "include") set(requires driver efuse soc) #unfortunately rom/uart uses SOC registers directly # driver is a public requirement because esp_sleep.h uses gpio_num_t & touch_pad_t # app_update is added here because cpu_start.c uses esp_ota_get_app_description() function. # esp_timer is added here because cpu_start.c uses esp_timer set(priv_requires app_trace app_update bootloader_support log mbedtls nvs_flash pthread spi_flash vfs espcoredump esp_common perfmon esp_timer) set(fragments linker.lf ld/esp32_fragments.lf) idf_component_register(SRCS "${srcs}" INCLUDE_DIRS "${include_dirs}" LDFRAGMENTS "${fragments}" REQUIRES "${requires}" PRIV_REQUIRES "${priv_requires}" REQUIRED_IDF_TARGETS esp32) target_linker_script(${COMPONENT_LIB} INTERFACE "${CMAKE_CURRENT_BINARY_DIR}/esp32_out.ld") # Rely on user code to define app_main target_link_libraries(${COMPONENT_LIB} INTERFACE "-u app_main") if(CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY) # This has to be linked before esp32.project.ld target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.extram.bss.ld") endif() # Process the template file through the linker script generation mechanism, and use the output for linking the # final binary target_linker_script(${COMPONENT_LIB} INTERFACE "${CMAKE_CURRENT_LIST_DIR}/ld/esp32.project.ld.in" PROCESS "${CMAKE_CURRENT_BINARY_DIR}/ld/esp32.project.ld") target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.peripherals.ld") target_link_libraries(${COMPONENT_LIB} PUBLIC gcc) target_link_libraries(${COMPONENT_LIB} INTERFACE "-u call_user_start_cpu0") #ld_include_panic_highint_hdl is added as an undefined symbol because otherwise the #linker will ignore panic_highint_hdl.S as it has no other files depending on any #symbols in it. target_link_libraries(${COMPONENT_LIB} INTERFACE "-u ld_include_panic_highint_hdl") idf_build_get_property(config_dir CONFIG_DIR) # Preprocess esp32.ld linker script to include configuration, becomes esp32_out.ld set(LD_DIR ${CMAKE_CURRENT_SOURCE_DIR}/ld) add_custom_command( OUTPUT esp32_out.ld COMMAND "${CMAKE_C_COMPILER}" -C -P -x c -E -o esp32_out.ld -I ${config_dir} ${LD_DIR}/esp32.ld MAIN_DEPENDENCY ${LD_DIR}/esp32.ld ${sdkconfig_header} COMMENT "Generating linker script..." VERBATIM) add_custom_target(esp32_linker_script DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/esp32_out.ld) add_dependencies(${COMPONENT_LIB} esp32_linker_script) # disable stack protection in files which are involved in initialization of that feature set_source_files_properties( cpu_start.c PROPERTIES COMPILE_FLAGS -fno-stack-protector) if(CONFIG_SPIRAM_CACHE_WORKAROUND) # Note: Adding as a PUBLIC compile option here causes this option to propagate to all components that depend on esp32. # # To handle some corner cases, the same flag is set in project_include.cmake target_compile_options(${COMPONENT_LIB} PUBLIC -mfix-esp32-psram-cache-issue) # also, make sure we link with this option so correct toolchain libs are pulled in target_link_libraries(${COMPONENT_LIB} PUBLIC -mfix-esp32-psram-cache-issue) endif() endif()