Instructions to cross-compile for ARM64:

$ rustup target add aarch64-unknown-linux-gnu

$ sudo apt install gcc-aarch64-linux-gnu

(Required flags already added to .cargo/config.toml)

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

References:
* https://rust-lang.github.io/rustup/cross-compilation.html
* https://doc.rust-lang.org/cargo/reference/config.html#target
* https://medium.com/swlh/compiling-rust-for-raspberry-pi-arm-922b55dbb050
* https://stackoverflow.com/questions/31770604/how-to-generate-statically-linked-executables#comment114789030_44387312
