libjitterentropy-sys 0.2.0

provides interface to jitterentropy-library (ffi-bindings)
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use std::{env::var, path::PathBuf};

use bindgen::Builder;

fn main() {
    let statik = cfg!(feature = "static");

    #[cfg(feature = "openssl")]
    pkg_config::Config::new().statik(statik).probe("libcrypto").unwrap();

    let bindings = Builder::default()
        .header("jitterentropy-include.h")
        .generate()
        .unwrap();
    let mut bindings_path = PathBuf::from(var("OUT_DIR").unwrap());
    bindings_path.push("jitterentropy-bindings.rs");
    bindings
        .write_to_file(&bindings_path)
        .expect("Could not write bindings to file");

    let found_jitterentropy = pkg_config::Config::new()
        .atleast_version("3.7")
        .statik(statik)
        .probe("jitterentropy");

    if found_jitterentropy.is_err() {
        let lib_path = std::env::var("JITTERENTROPY_LIB_DIR")
            .unwrap_or_else(|_| "/usr/lib".to_string());

        println!("cargo:rustc-link-search=native={lib_path}");
        if statik {
            println!("cargo:rustc-link-lib=static=jitterentropy");
        } else {
            println!("cargo:rustc-link-lib=jitterentropy");
        }
    }
}