// Copyright (C) 2021 Scott Lamb <slamb@slamb.org>
// SPDX-License-Identifier: MIT OR Apache-2.0

fn main() {
    println!("cargo:rerun-if-changed=src/wrapper.c");
    let libraries = [
        pkg_config::Config::new()
            .atleast_version("54.1")
            .probe("libavutil")
            .unwrap(),
        pkg_config::Config::new()
            .atleast_version("56.0")
            .probe("libavcodec")
            .unwrap(),
        pkg_config::Config::new()
            .atleast_version("57.5")
            .probe("libavformat")
            .unwrap(),
        #[cfg(feature = "swscale")]
        pkg_config::Config::new()
            .atleast_version("4.0")
            .probe("libswscale")
            .unwrap(),
    ];
    let mut wrapper = cc::Build::new();

    for lib in &libraries {
        // Pass include paths on to gcc. It'd be nice if pkg-config allowed fetching CFLAGS and
        // passing that on; see <https://github.com/alexcrichton/pkg-config-rs/issues/43>. But
        // the include paths are likely all that's included/significant for compilation.
        for p in &lib.include_paths {
            wrapper.include(p);
        }
    }

    if cfg!(feature = "swscale") {
        wrapper.define("MOONFIRE_USE_SWSCALE", Some("1"));
    }

    wrapper.file("src/wrapper.c").compile("libwrapper.a");
}