initial commit

rdraught-pi/Cargo.toml

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+[package]
+name = "rdraught-pi"
+version = "0.1.0"
+edition = "2024"
+authors = ["Walter Oggioni <oggioni.walter@gmail.com>"]
+license = "MIT"
+rust-version = "1.87"
+
+[[bin]]
+name = "hello"
+path = "src/hello.rs"
+
+[dependencies]
+panic-halt = "1.0"
+libc = { version = "0.2", default-features = false }
+

rdraught-pi/src/hello.rs

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+#![no_std]
+#![no_main]
+
+use libc::printf;
+
+extern crate libc;
+extern crate panic_halt;
+
+#[link(name = "c", kind = "static")]
+unsafe extern "C" {}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn main() {
+    unsafe {
+        printf("Hello world!!\n".as_ptr() as *const i8);
+    }
+}