use std::env;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;

fn main() {
    println!("cargo:rerun-if-changed=build.rs");
    let out = env::var("OUT_DIR").unwrap();
    let out_dir = &PathBuf::from(&out);

    // Put the linker script somewhere the linker can find it
    File::create(out_dir.join("link.x"))
        .unwrap()
        .write_all(include_bytes!("link.x"))
        .unwrap();
    println!("cargo:rustc-link-search={}", out_dir.display());

    // Only re-run the build script when link.x is changed,
    // instead of when any part of the source code changes.
    println!("cargo:rerun-if-changed=link.x");
}