rust/hg-core/build.rs

rust-core: add missing `Debug` traits

Turns out you need them when trying to use `hg-core` as a library. Who knew.

Differential Revision: https://phab.mercurial-scm.org/D8278

// build.rs
//
// Copyright 2020 Raphaël Gomès <[e-mail]>
//
// This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version.

#[cfg(feature = "with-re2")]
use cc;

#[cfg(feature = "with-re2")]
fn compile_re2() {
    cc::Build::new()
        .cpp(true)
        .flag("-std=c++11")
        .file("src/re2/rust_re2.cpp")
        .compile("librustre.a");

    println!("cargo:rustc-link-lib=re2");
}

fn main() {
    #[cfg(feature = "with-re2")]
    compile_re2();
}