SET(TOOLCHAIN_HOME "/home/cc/mksdk/rk3288linux/prebuilts/gcc/linux-x86/aarch64/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu")

# this is required
#SET(CMAKE_SYSTEM_NAME Linux)
 
# specify the cross compiler
SET(CMAKE_C_COMPILER ${TOOLCHAIN_HOME}/bin/aarch64-linux-gnu-gcc)
SET(CMAKE_CXX_COMPILER ${TOOLCHAIN_HOME}/bin/aarch64-linux-gnu-g++)

# where is the target environment 
SET(CMAKE_FIND_ROOT_PATH  ${TOOLCHAIN_HOME})
 
# search for programs in the build host directories (not necessary)
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)