Cross compilation

[nicks96432]

I managed to cross compile it on WSL with --target set to aarch64-unknown-linux-gnu.
The trick is to specify the target linker in the environment variable.
For example:

CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc cargo build --release --target aarch64-unknown-linux-gnu

Also, make sure that cross-compiling toolchains are installed.

[nicks96432]

I've finally successfully cross-compiled it with --target set to aarch64-apple-darwin.
Here is the step:

1. Install aarch64-apple-darwin rust toolchain with rustup.

2. Install tpoechtrager/osxcross or any Apple silicon cross-compiling toolchain.

3. cargo clean the project before building, or just remove the target directory.

4. Use the following command to build:

   CARGO_TARGET_AARCH64_APPLE_DARWIN_LINKER=aarch64-apple-darwin23-ld CC=aarch64-apple-darwin23-cc CXX=aarch64-apple-darwin23-c++ cargo build --release --target aarch64-apple-darwin