build.rs

extern crate cbindgen;

use std::env;
use std::fs;
use std::path::PathBuf;

fn main() {
    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
    let package_name = env::var("CARGO_PKG_NAME").unwrap();
    
    // Create include directory in project root
    let include_dir = PathBuf::from(&crate_dir).join("include");
    fs::create_dir_all(&include_dir).expect("Unable to create include directory");
    
    let output_file = include_dir
        .join(format!("{}.h", package_name))
        .display()
        .to_string();

    cbindgen::Builder::new()
        .with_crate(crate_dir)
        .with_language(cbindgen::Language::C)
        .generate()
        .expect("Unable to generate bindings")
        .write_to_file(&output_file);

    println!("cargo:rerun-if-changed=src/lib.rs");
}