sudo apt install gcc-aarch64-linux-gnu
rustup target add aarch64-unknown-linux-gnu

vim .cargo/config.toml
[target.aarch64-unknown-linux-gnu]
linker = "aarch64-linux-gnu-gcc"

cargo build --release --target aarch64-unknown-linux-gnu

mkdir hello && cd hello
cargo init
cargo build --release --target aarch64-unknown-linux-gnu
# [BIN] target/aarch64-unknown-linux-gnu/release/hello