SET(CMAKE_SYSTEM_NAME Linux)
SET(CMAKE_SYSTEM_VERSION 1)

# specify the cross compiler
SET(CMAKE_C_COMPILER   aarch64-linux-gnu-gcc)
SET(CMAKE_CXX_COMPILER aarch64-linux-gnu-g++)
SET(CMAKE_AR           aarch64-linux-gnu-ar CACHE FILEPATH "Archiver")

SET(THREADS_PTHREAD_ARG "2" CACHE STRING "Forcibly set by CMakeLists.txt." FORCE)

# where is the target environment
SET(CMAKE_FIND_ROOT_PATH  $ENV{TOOLCHAIN})

# search for programs in the build host directories
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)