build.rs

extern crate bindgen;

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

// Fix for: the name `IPPORT_RESERVED` is defined multiple times
// Issue:  https://github.com/rust-lang/rust-bindgen/issues/687
#[derive(Debug)]
struct IgnoreMacros(Vec<String>);

impl bindgen::callbacks::ParseCallbacks for IgnoreMacros {
    fn will_parse_macro(&self, name: &str) -> bindgen::callbacks::MacroParsingBehavior {
        if self.0.contains(&name.to_string()) {
            bindgen::callbacks::MacroParsingBehavior::Ignore
        } else {
            bindgen::callbacks::MacroParsingBehavior::Default
        }
    }
}

fn main() {
    println!("cargo:rustc-link-lib=ssh");
    println!("cargo:rerun-if-changed=wrapper.h");
    let ignored_macros = IgnoreMacros(vec!["IPPORT_RESERVED".into()]);
    let bindings = bindgen::Builder::default()
        .header("wrapper.h")
        .parse_callbacks(Box::new(ignored_macros))
        .rustfmt_bindings(true)
        .blacklist_type("IPPORT_RESERVED")
        .generate()
        .expect("Unable to generate bindings");

    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
    bindings
        .write_to_file(out_path.join("bindings.rs"))
        .expect("Couldn't write bindings!");
}