Macro cargo_emit::rustc_link_arg_bin

macro_rules! rustc_link_arg_bin {
    (to : $stream : expr, $bin : expr => $flags : expr $(,) ?) => { ... };
    (to : $stream : expr, $($bin : expr => $flags : expr), + $(,) ?) => { ... };
    ($bin : expr => $flags : expr $(,) ?) => { ... };
    ($($bin : expr => $flags : expr), + $(,) ?) => { ... };
}

Tells Cargo to pass the -C link-arg=$flag option to the compiler, but only when building the binary target with name $bin. Its usage is highly platform specific. It is useful to set a linker script or other linker options.

This is equivalent to:

println!("cargo:rustc-link-arg-bin=$bin=$flag");

Examples

cargo_emit::rustc_link_arg_bin!(
    "hello_world" => "-Wall"
);

or, in case you want it to emit to a custom stream:

let mut stdout = std::io::stdout();
cargo_emit::rustc_link_arg_bin!(
    to: stdout,
    "hello_world" => "-Wall"
);