wit-bindgen 0.61.1

Rust bindings generator and runtime support for WIT and the component model. Used when compiling Rust programs to the component model.
Documentation 
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use std::env;
use std::path::PathBuf;

fn main() {
    let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap_or(String::new());
    let target_family = env::var("CARGO_CFG_TARGET_FAMILY").unwrap_or(String::new());
    let target_env = env::var("CARGO_CFG_TARGET_ENV").unwrap_or(String::new());

    if target_family != "wasm" {
        return;
    }

    if target_arch != "wasm32" {
        panic!("only wasm32 supports cabi-realloc right now");
    }

    if target_env == "p1" || target_env == "" {
        link_lib("cabi_realloc");
    }
    link_lib("cabi_wasip3");
}

fn link_lib(name: &str) {
    let out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
    let mut src = env::current_dir().unwrap();
    src.push("src");
    src.push("rt");
    src.push(&format!("libwit_bindgen_{name}.a"));

    let dst_name = format!(
        "wit_bindgen_{name}_{}",
        env!("CARGO_PKG_VERSION").replace(".", "_")
    );
    let dst = out_dir.join(format!("lib{dst_name}.a"));

    std::fs::copy(&src, &dst).unwrap();

    println!("cargo:rustc-link-lib=static={dst_name}");
    println!("cargo:rustc-link-search=native={}", out_dir.display());
}