rust_minifb/build.rs

use std::env;
extern crate cc;

fn main() {
    let env = env::var("TARGET").unwrap();
    if env.contains("darwin") {
        cc::Build::new()
            .flag("-mmacosx-version-min=10.10")
            .file("src/native/macosx/MacMiniFB.m")
            .file("src/native/macosx/OSXWindow.m")
            .file("src/native/macosx/OSXWindowFrameView.m")
            .compile("libminifb_native.a");
        println!("cargo:rustc-link-lib=framework=Metal");
        println!("cargo:rustc-link-lib=framework=MetalKit");
    } else if !env.contains("windows") {
        // build scalar on non-windows and non-mac
        cc::Build::new()
            .file("src/native/unix/scalar.cpp")
            .opt_level(3) // always build with opts for scaler so it's fast in debug also
            .compile("libscalar.a")
    }
}