third_party/rust/packed_simd/build.rs


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fn main() {
    println!("cargo:rustc-env=RUSTC_BOOTSTRAP=1");
    let target = std::env::var("TARGET")
        .expect("TARGET environment variable not defined");
    if target.contains("neon") {
        println!("cargo:rustc-cfg=libcore_neon");
    }
}