objc2 0.3.0-alpha.4

use std::env;

fn main() {
    // The script doesn't depend on our code
    println!("cargo:rerun-if-changed=build.rs");

    let runtime = env::var("DEP_OBJC_RUNTIME").unwrap();
    println!("cargo:rustc-cfg={}", runtime);

    #[cfg(feature = "exception")]
    {
        println!("cargo:rerun-if-changed=extern/exception.m");

        let mut builder = cc::Build::new();
        builder.file("extern/exception.m");

        for flag in env::var("DEP_OBJC_CC_ARGS").unwrap().split(' ') {
            builder.flag(flag);
        }

        builder.compile("librust_objc_try_catch_exception.a");
    }
}