499d087c91
Ref. https://github.com/espressif/esp-idf/issues/1684 This change allows RTTI to be enabled in menuconfig. For full RTTI support, libstdc++.a in the toolchain should be built without -fno-rtti, as it is done now. Generally if libstdc++.a is built with RTTI, applications which do not use RTTI (and build with -fno-rtti) could still include typeinfo structures referenced from STL classes’ vtables. This change works around this, by moving all typeinfo structures from libstdc++.a into a non-loadable section, placed into a non-existent memory region starting at address 0. This can be done because when the application is compiled with -fno-rtti, typeinfo structures are not used at run time. This way, typeinfo structures do not contribute to the application binary size. If the application is build with RTTI support, typeinfo structures are linked into the application .rodata section as usual. Note that this commit does not actually enable RTTI support. The respective Kconfig option is hidden, and will be made visible when the toolchain is updated.
106 lines
4.4 KiB
CMake
106 lines
4.4 KiB
CMake
idf_build_get_property(sdkconfig_header SDKCONFIG_HEADER)
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if(BOOTLOADER_BUILD)
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# For bootloader, all we need from esp32 is headers
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idf_component_register(INCLUDE_DIRS include)
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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(srcs
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"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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"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(include_dirs "include")
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set(requires driver esp_event efuse 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(priv_requires app_trace app_update bootloader_support log mbedtls nvs_flash pthread
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spi_flash vfs wpa_supplicant espcoredump esp_common esp_wifi)
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set(fragments linker.lf ld/esp32_fragments.lf)
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idf_component_register(SRCS "${srcs}"
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INCLUDE_DIRS "${include_dirs}"
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LDFRAGMENTS "${fragments}"
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REQUIRES "${requires}"
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PRIV_REQUIRES "${priv_requires}"
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REQUIRED_IDF_TARGETS esp32)
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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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if(NOT CONFIG_COMPILER_CXX_RTTI)
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# This has to be linked before esp32.project.ld
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target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.discard-rtti.ld")
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endif()
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# Process the template file through the linker script generation mechanism, and use the output for linking the
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# final binary
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target_linker_script(${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(config_dir CONFIG_DIR)
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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_header}
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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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