binaryen-sys 0.1.0

extern crate bindgen;
extern crate cmake;

use std::env;
use std::path::{Path, PathBuf};
use std::process::Command;

fn gen_bindings() {
    let bindings = bindgen::Builder::default()
        .header("wrapper.h")
        .generate_comments(true)
        .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!");
}

fn main() {
    if !Path::new("binaryen/.git").exists() {
        let _ = Command::new("git")
            .args(&["submodule", "update", "--init"])
            .status();
    }

    gen_bindings();

    let dst = cmake::Config::new("binaryen")
        .define("BUILD_STATIC_LIB", "ON")
        .build();

    println!("cargo:rustc-link-search=native={}/build/lib", dst.display());
    println!("cargo:rustc-link-lib=static=binaryen");
    println!("cargo:rustc-link-lib=static=asmjs");
    println!("cargo:rustc-link-lib=static=ast");
    println!("cargo:rustc-link-lib=static=cfg");
    println!("cargo:rustc-link-lib=static=passes");
    println!("cargo:rustc-link-lib=static=support");
    println!("cargo:rustc-link-lib=static=wasm");
    println!("cargo:rustc-link-lib=static=emscripten-optimizer");

    // We need to link against C++ std lib
    if let Some(cpp_stdlib) = get_cpp_stdlib() {
        println!("cargo:rustc-link-lib={}", cpp_stdlib);
    }
}

// See https://github.com/alexcrichton/gcc-rs/blob/88ac58e25/src/lib.rs#L1197
fn get_cpp_stdlib() -> Option<String> {
    env::var("TARGET").ok().and_then(|target| {
        if target.contains("msvc") {
            None
        } else if target.contains("darwin") {
            Some("c++".to_string())
        } else if target.contains("freebsd") {
            Some("c++".to_string())
        } else if target.contains("musl") {
            Some("static=stdc++".to_string())
        } else {
            Some("stdc++".to_string())
        }
    })
}