myvtm/addin/cmake/UOSToolchain.cmake

# cmake script which sets up all the toolchain related variables
# -DCMAKE_TOOLCHAIN_FILE=this_file_name.cmake 

set(CMAKE_SYSTEM_NAME Linux) # UOS
set(CMAKE_SYSTEM_PROCESSOR arm)
#set(CMAKE_SYSTEMROOT)

set(cross_compile_tools )
set(CMAKE_C_COMPILER aarch64-linux-gnu-gcc-8)
# if toolchains is a GNU toolchain, only need to set one of both
set(CMAKE_CXX_COMPILER aarch64-linux-gnu-g++-8)

# target library find path be prefixed with
# set(CMAKE_FIND_ROOT_PATH )

# set behaviour for find_program() cmd: never, only, both,refer to CMAKE_FIND_ROOT_PATH
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)