set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR riscv64)
set(RISCV_CROSS_BUILD_ARCH riscv64)
if(DEFINED ENV{RISCV_TOOLCHAIN_ROOT})
file(TO_CMAKE_PATH $ENV{RISCV_TOOLCHAIN_ROOT} RISCV_TOOLCHAIN_ROOT)
else()
message(FATAL_ERROR "RISCV_TOOLCHAIN_ROOT env must be defined")
endif()
set(RISCV_TOOLCHAIN_ROOT
${RISCV_TOOLCHAIN_ROOT}
CACHE STRING "root path to riscv toolchain")
set(CMAKE_C_COMPILER "${RISCV_TOOLCHAIN_ROOT}/bin/riscv64-unknown-linux-gnu-gcc")
set(CMAKE_CXX_COMPILER "${RISCV_TOOLCHAIN_ROOT}/bin/riscv64-unknown-linux-gnu-g++")
set(CMAKE_FIND_ROOT_PATH "${RISCV_TOOLCHAIN_ROOT}/riscv64-unknown-linux-gnu")
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)