fn main() {
let target_arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap_or_default();
let target_os = std::env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();
if target_arch == "wasm32" || target_os == "hermit" {
println!("cargo:rustc-cfg=feature=\"std\"");
}
}