fn main() {
println!("arch: {}", target::arch());
println!("os: {}", target::os());
println!("family: {}", target::family());
println!("env: {}", target::env());
println!("endian: {}", target::endian());
println!("pointer_width: {}", target::pointer_width());
println!("vendor: {}", target::vendor());
println!("feature: {:?}", target::features());
}