set(CROSS_ROOTFS $ENV{ROOTFS_DIR})

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_VERSION 1)
set(CMAKE_SYSTEM_PROCESSOR aarch64)

add_compile_options(-target aarch64-linux-gnu)
add_compile_options(--sysroot=${CROSS_ROOTFS})

set(CROSS_LINK_FLAGS "-target aarch64-linux-gnu")
set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -B ${CROSS_ROOTFS}/usr/lib/gcc/aarch64-linux-gnu")
set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -L${CROSS_ROOTFS}/lib/aarch64-linux-gnu")
set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} --sysroot=${CROSS_ROOTFS}")

set(CMAKE_EXE_LINKER_FLAGS    "${CROSS_LINK_FLAGS}" CACHE STRING "TOOLCHAIN_EXE_LINKER_FLAGS" FORCE)
set(CMAKE_SHARED_LINKER_FLAGS "${CROSS_LINK_FLAGS}" CACHE STRING "TOOLCHAIN_SHARED_LINKER_FLAGS" FORCE)
set(CMAKE_MODULE_LINKER_FLAGS "${CROSS_LINK_FLAGS}" CACHE STRING "TOOLCHAIN_MODULE_LINKER_FLAGS" FORCE)

set(CMAKE_FIND_ROOT_PATH "${CROSS_ROOTFS}")
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)