feat: added header file for communicating config

sparse-actions/build.rs

@@ -0,0 +1,15 @@
+use std::{env, path::Path};
+
+fn main() {
+    let out_dir = env::var_os("OUT_DIR").unwrap();
+
+    let dest_bindings = Path::new(&out_dir).join("bindings.rs");
+
+    bindgen::Builder::default()
+        .header("../unix-loader/src/abi.h")
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
+        .generate()
+        .expect("unable to generate bindings")
+        .write_to_file(dest_bindings)
+        .expect("could not write bidnings");
+}