esp-idf/tools/cmake/toolchain-esp32c3.cmake

set(CMAKE_SYSTEM_NAME Generic)

set(CMAKE_C_COMPILER riscv32-esp-elf-gcc)
set(CMAKE_CXX_COMPILER riscv32-esp-elf-g++)
set(CMAKE_ASM_COMPILER riscv32-esp-elf-gcc)

list(APPEND compile_options "-march=rv32imc")

# Option `--specs` must only be defined ONCE in the final linker command, else GCC will complain:
# "attempt to rename spec 'link_gcc_c_sequence' to already defined spec 'nosys_link_gcc_c_sequence'"
# so unset `link_options` first.
unset(link_options)
list(APPEND link_options "-nostartfiles" "-march=rv32imc" "--specs=nosys.specs")
cmake: Add esp32c3 toolchain file 2020-12-22 04:21:11 -05:00			`set(CMAKE_SYSTEM_NAME Generic)`

			`set(CMAKE_C_COMPILER riscv32-esp-elf-gcc)`
			`set(CMAKE_CXX_COMPILER riscv32-esp-elf-g++)`
			`set(CMAKE_ASM_COMPILER riscv32-esp-elf-gcc)`

Build: CMake compiler flags will be set, regardless of the cache status 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 2021-09-29 06:46:35 -04:00			`list(APPEND compile_options "-march=rv32imc")`

			# Option `--specs` must only be defined ONCE in the final linker command, else GCC will complain:
			`# "attempt to rename spec 'link_gcc_c_sequence' to already defined spec 'nosys_link_gcc_c_sequence'"`
			# so unset `link_options` first.
			`unset(link_options)`
			`list(APPEND link_options "-nostartfiles" "-march=rv32imc" "--specs=nosys.specs")`