# Look for GCC in path
# https://xpack.github.io/riscv-none-embed-gcc/
FIND_FILE( RISCV_XPACK_GCC_COMPILER_EXE "riscv-none-embed-gcc.exe" PATHS ENV INCLUDE)
FIND_FILE( RISCV_XPACK_GCC_COMPILER "riscv-none-embed-gcc" PATHS ENV INCLUDE)
# New versions of xpack
FIND_FILE( RISCV_XPACK_NEW_GCC_COMPILER_EXE "riscv-none-elf-gcc.exe" PATHS ENV INCLUDE)
FIND_FILE( RISCV_XPACK_NEW_GCC_COMPILER "riscv-none-elf-gcc" PATHS ENV INCLUDE)
# Look for RISC-V github GCC
# https://github.com/riscv/riscv-gnu-toolchain
FIND_FILE( RISCV_XPACK_GCC_COMPILER_EXT "riscv64-unknown-elf-gcc.exe" PATHS ENV INCLUDE)
FIND_FILE( RISCV_XPACK_GCC_COMPILER "riscv64-unknown-elf-gcc" PATHS ENV INCLUDE)

# Select which is found
if (EXISTS ${RISCV_XPACK_NEW_GCC_COMPILER})
set( RISCV_GCC_COMPILER ${RISCV_XPACK_NEW_GCC_COMPILER})
elseif (EXISTS ${RISCV_XPACK_GCC_NEW_COMPILER_EXE})
set( RISCV_GCC_COMPILER ${RISCV_XPACK_NEW_GCC_COMPILER_EXE})
elseif (EXISTS ${RISCV_XPACK_GCC_COMPILER})
set( RISCV_GCC_COMPILER ${RISCV_XPACK_GCC_COMPILER})
elseif (EXISTS ${RISCV_XPACK_GCC_COMPILER_EXE})
set( RISCV_GCC_COMPILER ${RISCV_XPACK_GCC_COMPILER_EXE})
elseif (EXISTS ${RISCV_GITHUB_GCC_COMPILER})
set( RISCV_GCC_COMPILER ${RISCV_GITHUB_GCC_COMPILER})
elseif (EXISTS ${RISCV_GITHUB_GCC_COMPILER_EXE})
set( RISCV_GCC_COMPILER ${RISCV_GITHUB_GCC_COMPILER_EXE})
else()
message(FATAL_ERROR "RISC-V GCC not found. ${RISCV_GITHUB_GCC_COMPILER} ${RISCV_XPACK_GCC_COMPILER} ${RISCV_GITHUB_GCC_COMPILER_EXE} ${RISCV_XPACK_GCC_COMPILER_EXE}")
endif()

get_filename_component(RISCV_TOOLCHAIN_BIN_PATH ${RISCV_GCC_COMPILER} DIRECTORY)
get_filename_component(RISCV_TOOLCHAIN_BIN_GCC ${RISCV_GCC_COMPILER} NAME_WE)
get_filename_component(RISCV_TOOLCHAIN_BIN_EXT ${RISCV_GCC_COMPILER} EXT)

STRING(REGEX REPLACE "\-gcc" "-" CROSS_COMPILE ${RISCV_TOOLCHAIN_BIN_GCC})

# The Generic system name is used for embedded targets (targets without OS)
set(CMAKE_SYSTEM_NAME Generic )
set(CMAKE_EXECUTABLE_SUFFIX_C ".elf")
set(RISCV_ARCH rv32imc_zicsr_zifencei )
set(RISCV_ABI ilp32)


set(CMAKE_ASM_COMPILER {CROSS_COMPILE}gcc )
set(CMAKE_AR ${CROSS_COMPILE}ar)
set(CMAKE_ASM_COMPILER ${CROSS_COMPILE}gcc)
set(CMAKE_C_COMPILER ${CROSS_COMPILE}gcc)
set(CMAKE_CXX_COMPILER ${CROSS_COMPILE}g++)

set( CMAKE_OBJCOPY      ${RISCV_TOOLCHAIN_BIN_PATH}/${CROSS_COMPILE}objcopy
     CACHE FILEPATH "The toolchain objcopy command " FORCE )

set( CMAKE_OBJDUMP      ${RISCV_TOOLCHAIN_BIN_PATH}/${CROSS_COMPILE}objdump
     CACHE FILEPATH "The toolchain objdump command " FORCE )

set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=${RISCV_ARCH} -mabi=${RISCV_ABI}" )

set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS}" CACHE STRING "" )
set( CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS}" CACHE STRING "" )
set( CMAKE_ASM_FLAGS "${CMAKE_C_FLAGS}" CACHE STRING "" )