#![feature(global_asm)] #![feature(naked_functions)] #![allow(dead_code)] #[cfg(any(target_arch = "x86_64", target_arch = "x86"))] global_asm!(r#" .global foo .global _foo foo: _foo: ret "#); extern { fn foo(); } #[cfg(any(target_arch = "x86_64", target_arch = "x86"))] fn main() { unsafe { foo(); } } #[cfg(not(any(target_arch = "x86_64", target_arch = "x86")))] fn main() {}