mcuboot/boot/espressif/tools/toolchain-esp32c2.cmake

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CMake
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# SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
#
# SPDX-License-Identifier: Apache-2.0
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 "-march=rv32imc_zicsr_zifencei" CACHE STRING "C Compiler Base Flags")
set(CMAKE_CXX_FLAGS "-march=rv32imc_zicsr_zifencei" CACHE STRING "C++ Compiler Base Flags")
set(CMAKE_EXE_LINKER_FLAGS "-nostartfiles -march=rv32imc_zicsr_zifencei --specs=nosys.specs" CACHE STRING "Linker Base Flags")