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0baf2c43cc
Defining CMake variables from the command-line or from another CMake project, such as `-DCMAKE_C_FLAGS= -DCMAKE_CXX_FLAGS=`, caused a link failure as ESP CMake was unable to set its proper compilation flags. Additional CMake compiler flags can now be provided by another project. * Closes https://github.com/espressif/esp-idf/issues/7507
19 lines
754 B
CMake
19 lines
754 B
CMake
include($ENV{IDF_PATH}/tools/cmake/utilities.cmake)
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set(CMAKE_SYSTEM_NAME Generic)
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set(CMAKE_C_COMPILER clang)
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set(CMAKE_CXX_COMPILER clang++)
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set(CMAKE_ASM_COMPILER clang)
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set(CMAKE_AR xtensa-esp32-elf-ar)
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set(CMAKE_RANLIB xtensa-esp32-elf-gcc-ranlib)
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set(CMAKE_OBJDUMP xtensa-esp32-elf-objdump)
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# -freestanding is a hack to force Clang to use its own stdatomic.h,
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# without falling back to the (incompatible) GCC stdatomic.h
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# https://github.com/espressif/llvm-project/blob/d9341b81/clang/lib/Headers/stdatomic.h#L13-L18
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list(APPEND c_compile_options "--target=xtensa" "-mcpu=esp32" "-ffreestanding")
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list(APPEND cxx_compile_options "--target=xtensa" "-mcpu=esp32" "-ffreestanding")
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list(APPEND asm_compile_options "--target=xtensa" "-mcpu=esp32")
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