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https://github.com/espressif/esp-idf.git
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Alexey Lapshin
44ef9bec48
The --gc-sections flag in picolibc.specs causes CMake compiler detection to fail by dropping required data. Work around this by creating a modified specs file without the flag.
69 lines
2.6 KiB
CMake
69 lines
2.6 KiB
CMake
# Get picolibc specs option with --gc-sections flag removed
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function(get_picolibc_specs_path out_var)
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set(modified_specs_path "${CMAKE_CURRENT_BINARY_DIR}/specs/picolibc.specs")
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set(${out_var} "${modified_specs_path}" PARENT_SCOPE)
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# Return if modified specs file already exists to avoid regeneration
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if(EXISTS "${modified_specs_path}")
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return()
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endif()
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# Find the original picolibc.specs file in the toolchain directory
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execute_process(
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COMMAND ${CMAKE_C_COMPILER} --print-file-name=picolibc.specs
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OUTPUT_VARIABLE picolibc_specs_path
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_QUIET
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)
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if(picolibc_specs_path AND EXISTS "${picolibc_specs_path}")
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# Read the original specs file
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file(READ "${picolibc_specs_path}" specs_content)
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# Remove --gc-sections flag from the content
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string(REGEX REPLACE "--gc-sections" "" specs_content "${specs_content}")
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# Write the modified specs file
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file(WRITE "${modified_specs_path}" "${specs_content}")
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else()
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# Fallback: use original specs if not found
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message(WARNING "picolibc.specs not found in toolchain, using default")
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set(${out_var} "picolibc.specs" PARENT_SCOPE)
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endif()
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endfunction()
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if(CONFIG_IDF_TOOLCHAIN_GCC)
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if(CONFIG_STDATOMIC_S32C1I_SPIRAM_WORKAROUND)
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idf_toolchain_add_flags(COMPILE_OPTIONS "-mdisable-hardware-atomics")
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else()
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idf_toolchain_remove_flags(COMPILE_OPTIONS "-mdisable-hardware-atomics")
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endif()
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if(CONFIG_LIBC_PICOLIBC)
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# TODO GCC-464:
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# The original picolibc.specs file cannot be used directly in the build
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# system because it contains the --gc-sections linker flag. This flag
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# causes CMake's compiler detection checks to incorrectly drop required
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# data during configuration.
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#
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# Workaround: Copy picolibc.specs to the working directory with removed
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# --gc-sections option.
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get_picolibc_specs_path(picolibc_specs_path)
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idf_toolchain_add_flags(COMPILE_OPTIONS "\"-specs=${picolibc_specs_path}\"")
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else()
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idf_toolchain_remove_flags(COMPILE_OPTIONS "-specs=.*picolibc.*")
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endif()
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if(CONFIG_LIBC_NEWLIB_NANO_FORMAT)
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idf_toolchain_add_flags(LINK_OPTIONS "--specs=nano.specs")
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else()
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idf_toolchain_remove_flags(LINK_OPTIONS "--specs=nano.specs")
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endif()
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idf_toolchain_rerun_abi_detection()
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else() # TODO IDF-14338
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if(CONFIG_STDATOMIC_S32C1I_SPIRAM_WORKAROUND)
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idf_build_set_property(COMPILE_OPTIONS "-mdisable-hardware-atomics" APPEND)
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endif()
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endif()
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