Dev/Embedded/CrossCompile

https://wiki.debian.org/fr/Multiarch/HOWTO

dpkg --print-foreign-architectures
dpkg --add-architecture <arch>

apt-get install binutils-aarch64-linux-gnu cpp-aarch64-linux-gnu gcc-aarch64-linux-gnu libc6-dev:arm64 
apt-get install bison flex
apt-get install libncurses-dev

for uboot :

apt-get install python3-setuptools swig libgnutls28-dev libssl-dev

for mtd images creation :

apt-get install mtd-utils squashfs-tools

https://wiki.debian.org/Multiarch/Implementation