Add dependency file and compile script

.vscode/settings.json

@@ -6,6 +6,14 @@
                 {
                     "root_module": "src/main.rs",
                     "edition": "2018",
+                    "deps": [{
+                        "crate": 1,
+                        "name": "hello",
+                    }],
+                },
+                {
+                    "root_module": "include/hello.rs",
+                    "edition": "2018",
                     "deps": [],
                 },
             ]

compile.sh

@@ -0,0 +1,2 @@
+rustc --crate-type=lib include/hello.rs
+rustc --extern hello=libhello.rlib src/main.rs

include/hello.rs

@@ -0,0 +1,4 @@
+/// prints a hello world message
+pub fn print_hello() {
+    println!("Hello World!");
+}

src/main.rs

@@ -1,7 +1,6 @@
 use std::collections::HashMap;
 
-fn foo() {}
 fn main() {
-    std::asm!()
-    println!("Hello, world!");
+    std::assert!(true);
+    hello::print_hello();
 }