libseccomp 0.4.0

Rust Language Bindings for the libseccomp Library
Documentation 
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// SPDX-License-Identifier: Apache-2.0 or MIT
//
// Copyright 2021 Sony Group Corporation
//

use std::{env, path, str};

const LIBSECCOMP_LIB_PATH: &str = "LIBSECCOMP_LIB_PATH";

fn main() {
    println!("cargo:rerun-if-env-changed={}", LIBSECCOMP_LIB_PATH);

    if let Ok(path) = env::var(LIBSECCOMP_LIB_PATH) {
        println!("cargo:rustc-link-search=native={}", path);
        let pkgconfig = path::Path::new(&path).join("pkgconfig");
        env::set_var("PKG_CONFIG_PATH", pkgconfig);
    }

    let target = env::var("TARGET").unwrap_or_default();
    let host = env::var("HOST").unwrap_or_default();
    if target != host {
        env::set_var("PKG_CONFIG_ALLOW_CROSS", "1");
    }

    if pkg_config::Config::new()
        .atleast_version("2.6.0")
        .probe("libseccomp")
        .is_ok()
    {
        println!("cargo:rustc-cfg=libseccomp_v2_6");
    }
}