This post is Nim specific, but the key ideas for getting to a small binary (optimize for size, remove the standard library, avoid compiler main() / crt0 baggage

This post is Nim specific, but the key ideas for getting to a small binary (optimize for size, remove the standard library, avoid compiler main() / crt0 baggage by defining _start, use system calls directly) are the same in C, C++, Rust, etc.