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"); } }