set_ifndef(XTOOLS_TOOLCHAIN_PATH "$ENV{XTOOLS_TOOLCHAIN_PATH}")
set(       XTOOLS_TOOLCHAIN_PATH    ${XTOOLS_TOOLCHAIN_PATH} CACHE PATH "")
assert(    XTOOLS_TOOLCHAIN_PATH     "XTOOLS_TOOLCHAIN_PATH is not set")

set(TOOLCHAIN_HOME ${XTOOLS_TOOLCHAIN_PATH})

set(COMPILER gcc)

set(CROSS_COMPILE_TARGET_arm arm-none-eabi)
set(CROSS_COMPILE_TARGET_x86 i586-zephyr-elfiamcu)

set(CROSS_COMPILE_TARGET     ${CROSS_COMPILE_TARGET_${ARCH}})
set(SYSROOT_TARGET           ${CROSS_COMPILE_TARGET})

set(CROSS_COMPILE ${TOOLCHAIN_HOME}/${CROSS_COMPILE_TARGET}/bin/${CROSS_COMPILE_TARGET}-)
set(SYSROOT_DIR   ${TOOLCHAIN_HOME}/${SYSROOT_TARGET})