tectonic_bridge_core 0.4.0

Exposing core backend APIs to the Tectonic C/C++ code.
Documentation 
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// Copyright 2020-2021 the Tectonic Project
// Licensed under the MIT License.

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

fn main() {
    let manifest_dir: PathBuf = env::var("CARGO_MANIFEST_DIR").unwrap().into();

    let mut main_header_src = manifest_dir;
    main_header_src.push("support");

    let mut build = cc::Build::new();
    build
        .warnings(true)
        .file("support/support.c")
        .include(&main_header_src)
        .compile("libtectonic_bridge_core.a");

    println!("cargo:rerun-if-changed=support/support.c");
    println!("cargo:rerun-if-changed=support/tectonic_bridge_core.h");
    println!("cargo:rerun-if-changed=support/tectonic_bridge_core_generated.h");

    // Cargo exposes this as the environment variable DEP_XXX_INCLUDE, where XXX
    // is the "links" setting in Cargo.toml. This is the key element that allows
    // us to have a network of crates containing both C/C++ and Rust code that
    // all interlink.
    println!("cargo:include={}", main_header_src.display());
}