standalone.rs

#![no_std]
#![feature(no_std, libc, lang_items, start)]
#![no_main]

//! ```sh
//!     # compile
//!     rustc -C opt-level=3 -C no-stack-check standalone.rs
//!     # strip
//!     strip -sR .comment -R .gnu.hash -R .gnu.version -R .note.ABI-tag -R .note.gnu.build-id standalone
//!     # check size
//!     ls -lh standalone
//!     # output: -rwxr-xr-x 1 till till 4.5K Apr  4 20:30 standalone*
//! ```

extern crate libc;

use libc::funcs::c95::stdio::puts;

const HELLO: &'static [u8] = b"Hello World!\x00";

#[no_mangle]
pub extern fn main(_argc: isize, _argv: *const *const u8) -> isize {
    unsafe { puts(&HELLO[0] as *const u8 as *const i8); }
    0
}

#[lang = "stack_exhausted"] extern fn stack_exhausted() {}
#[lang = "eh_personality"] extern fn eh_personality() {}
#[lang = "panic_fmt"] fn panic_fmt() -> ! { loop {} }