executable-cdylib

.gitignore

/target
Cargo.lock

build.rs

fn main() {
    println!("cargo:rustc-cdylib-link-arg=-emain")
}

Cargo.toml

[package]
name = "executable-cdylib"
authors = ["南浦月 <nanpuyue@gmail.com>"]
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[lib]
path = "lib.rs"
crate-type = ["cdylib"]

lib.rs

#![allow(unused)]
use std::io::{stdout, Write};
use std::process::exit;

#[no_mangle]
#[link_section = ".interp"]
static INTERP: [u8; 26] = *b"/lib/ld-linux-x86-64.so.2\0";

#[no_mangle]
unsafe extern "C" fn main() {
    let _ = stdout().write_all(&*b"Hello World!\n");

    // stdout().write_all(&*b"Hello World!\n").unwrap(); // Segmentation fault with debug build

    // println!("Hello World!"); // Segmentation fault with debug/release build

    exit(0)
}