esp-idf/components/ulp/cmake/toolchain-esp32s2-ulp-riscv.cmake

# CMake toolchain file for ULP-RISC-V
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")

set(CMAKE_C_FLAGS "-Os -march=rv32imc -mdiv -fdata-sections -ffunction-sections"
    CACHE STRING "C Compiler Base Flags")
set(CMAKE_CXX_FLAGS "-Os -march=rv32imc -mdiv -fdata-sections -ffunction-sections"
    CACHE STRING "C++ Compiler Base Flags")
set(CMAKE_ASM_FLAGS "-march=rv32imc -x assembler-with-cpp"
    CACHE STRING "Assembler Base Flags")
set(CMAKE_EXE_LINKER_FLAGS "-march=rv32imc --specs=nano.specs --specs=nosys.specs"
    CACHE STRING "Linker Base Flags")
ulp: added support to building code for riscv ULP coprocessor 2020-04-17 15:34:56 -04:00			`# CMake toolchain file for ULP-RISC-V`
			`set(CMAKE_SYSTEM_NAME Generic)`

tools: use riscv32-esp-elf toolchain for ESP32-S2 RISC-V ULP riscv32-esp-elf toolchain (used for ESP32-C3) can also be used for ESP32-S2 RISC-V ULP coprocessor. This removes the riscv-none-embed-gcc toolchain which was originally used for the ULP, and updates the docs and CMake files to use riscv32-esp-elf. Some flags are cleaned up and workarounds removed from CMake toolchain file. 2020-12-15 12:24:07 -05:00			`set(CMAKE_C_COMPILER "riscv32-esp-elf-gcc")`
			`set(CMAKE_CXX_COMPILER "riscv32-esp-elf-g++")`
			`set(CMAKE_ASM_COMPILER "riscv32-esp-elf-gcc")`

			`set(CMAKE_C_FLAGS "-Os -march=rv32imc -mdiv -fdata-sections -ffunction-sections"`
			`CACHE STRING "C Compiler Base Flags")`
			`set(CMAKE_CXX_FLAGS "-Os -march=rv32imc -mdiv -fdata-sections -ffunction-sections"`
			`CACHE STRING "C++ Compiler Base Flags")`
			`set(CMAKE_ASM_FLAGS "-march=rv32imc -x assembler-with-cpp"`
			`CACHE STRING "Assembler Base Flags")`
			`set(CMAKE_EXE_LINKER_FLAGS "-march=rv32imc --specs=nano.specs --specs=nosys.specs"`
			`CACHE STRING "Linker Base Flags")`