use cfg_aliases::cfg_aliases;fn main() {    cfg_aliases! {        android: { target_os = "android" },        dragonfly: { target_os = "dragonfly" },        ios: { target_os = "ios" },        freebsd: { target_os = "freebsd" },        illumos: { target_os = "illumos" },        linux: { target_os = "linux" },        macos: { target_os = "macos" },        netbsd: { target_os = "netbsd" },        openbsd: { target_os = "openbsd" },        solaris: { target_os = "solaris" },        watchos: { target_os = "watchos" },        tvos: { target_os = "tvos" },        visionos: { target_os = "visionos" },        // cfg aliases we would like to use        apple_targets: { any(ios, macos, watchos, tvos, visionos) },        bsd: { any(freebsd, dragonfly, netbsd, openbsd, apple_targets) },        bsd_without_apple: { any(freebsd, dragonfly, netbsd, openbsd) },        linux_android: { any(android, linux) },        freebsdlike: { any(dragonfly, freebsd) },        netbsdlike: { any(netbsd, openbsd) },        solarish: { any(illumos, solaris) },    }    // Below are Nix's custom cfg values that we need to let the compiler know    println!("cargo:rustc-check-cfg=cfg(apple_targets)");    println!("cargo:rustc-check-cfg=cfg(bsd)");    println!("cargo:rustc-check-cfg=cfg(bsd_without_apple)");    println!("cargo:rustc-check-cfg=cfg(linux_android)");    println!("cargo:rustc-check-cfg=cfg(freebsdlike)");    println!("cargo:rustc-check-cfg=cfg(netbsdlike)");    println!("cargo:rustc-check-cfg=cfg(solarish)");    println!("cargo:rustc-check-cfg=cfg(fbsd14)");    println!("cargo:rustc-check-cfg=cfg(qemu)");}