acmed/acme_common/build.rs

use std::env;

macro_rules! set_rustc_env_var {
    ($name: expr, $value: expr) => {{
        println!("cargo:rustc-env={}={}", $name, $value);
    }};
}

#[allow(clippy::unusual_byte_groupings)]
fn main() {
    if let Ok(v) = env::var("DEP_OPENSSL_VERSION_NUMBER") {
        let version = u64::from_str_radix(&v, 16).unwrap();
        // OpenSSL 1.1.1
        if version >= 0x1_01_01_00_0 {
            println!("cargo:rustc-cfg=ed25519");
            println!("cargo:rustc-cfg=ed448");
        }
        set_rustc_env_var!("ACMED_TLS_LIB_NAME", "OpenSSL");
    }
    if env::var("DEP_OPENSSL_LIBRESSL_VERSION_NUMBER").is_ok() {
        set_rustc_env_var!("ACMED_TLS_LIB_NAME", "LibreSSL");
    }
}