In reply to @theloserscandy "Had anyone had any": I just managed to
cross-compile a simple `echo "Hello, world!"` app

1) Install `clang`
2) Install `zig`
3) Install https://github.com/enthus1ast/zigcc  (`nimble install zigcc`)
4) `nim c --cc:clang --clang.exe="zigcc.cmd" --clang.linkerexe="zigcc.cmd"
--cpu:arm64 --os:macosx --passC:"-target aarch64-macos" --passL:"-target
aarch64-macos" helloworld.nim`