rust/tests/run-make/lto-smoke/rmake.rs

// A simple smoke test to check that link time optimization
// (LTO) is accepted by the compiler, and that
// passing its various flags still results in successful compilation.
// See https://github.com/rust-lang/rust/issues/10741

//@ ignore-cross-compile

use run_make_support::rustc;

fn main() {
    let lto_flags = ["-Clto", "-Clto=yes", "-Clto=off", "-Clto=thin", "-Clto=fat"];
    for flag in lto_flags {
        rustc().input("lib.rs").run();
        rustc().input("main.rs").arg(flag).run();
    }
}