In your LSDK 21.08 host build environment, please execute the following command:
$ sudo chroot build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/
Then run the following command.
/# apt-get install libopencv-dev
/# exit
You will get
build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/usr/lib/aarch64-linux-gnu/libopencv_aruco.so.4.2.0
build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/usr/lib/aarch64-linux-gnu/libopencv_aruco.so.4.2
build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/usr/lib/aarch64-linux-gnu/libopencv_aruco.so
build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/usr/lib/aarch64-linux-gnu/libopencv_aruco.a
In your LSDK 21.08 host build environment, please execute the following command:
$ sudo chroot build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/
Then run the following command.
/# apt-get install libopencv-dev
/# exit
You will get
build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/usr/lib/aarch64-linux-gnu/libopencv_aruco.so.4.2.0
build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/usr/lib/aarch64-linux-gnu/libopencv_aruco.so.4.2
build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/usr/lib/aarch64-linux-gnu/libopencv_aruco.so
build/rfs/rootfs_lsdk2108_ubuntu_main_arm64/usr/lib/aarch64-linux-gnu/libopencv_aruco.a