link to the static lib during build

build.rs

@@ -1,4 +1,31 @@
+use std::env;
+use std::path::Path;
+use std::process::Command;
+
 fn main() {
-    /* println!("cargo:rustc-link-search=native=./");
-    println!("cargo:rustc-link-lib=k"); */
+    let out_dir = env::var("OUT_DIR").unwrap();
+    let cbqn_dir = Path::new(&out_dir).join("CBQN");
+
+    if !cbqn_dir.exists() {
+        Command::new("git")
+            .args([
+                "clone",
+                "https://github.com/dzaima/CBQN.git",
+                cbqn_dir.to_str().unwrap(),
+            ])
+            .status()
+            .expect("cargo:warning=Failed to clone CBQN repository");
+    }
+
+    Command::new("make")
+        .current_dir(&cbqn_dir)
+        .arg("static-lib")
+        .arg("FFI=0")
+        .status()
+        .expect("cargo:warning=Failed to build CBQN static library");
+
+    println!("cargo:rustc-link-search=native={}", cbqn_dir.display());
+    println!("cargo:rustc-link-lib=static=cbqn");
+
+    println!("cargo:rerun-if-changed={}", cbqn_dir.join("src").display());
 }