esp-idf/components/ulp/cmake/toolchain-esp32s2-ulp-riscv.cmake
Ivan Grokhotkov de798541dc 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.
2020-12-29 19:19:18 +00:00

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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")