1 files changed, 40 insertions, 0 deletions
diff --git a/rust/minijail-sys/build.rs b/rust/minijail-sys/build.rs
new file mode 100644
index 0000000..8c7ea6d
--- /dev/null
+++ b/rust/minijail-sys/build.rs
@@ -0,0 +1,40 @@
+// Copyright 2019 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/// Minijail's build script invoked by cargo.
+///
+/// This script prefers linking against a pkg-config provided libminijail, but will fall back to
+/// building libminijail statically.
+use std::env;
+use std::io;
+use std::process::Command;
+
+fn main() -> io::Result<()> {
+    // Minijail requires libcap at runtime.
+    pkg_config::Config::new().probe("libcap").unwrap();
+
+    // Prefer a system-provided Minijail library.
+    if pkg_config::Config::new().probe("libminijail").is_ok() {
+        return Ok(());
+    }
+
+    let current_dir = env::var("CARGO_MANIFEST_DIR").unwrap() + "/../..";
+    let out_dir = env::var("OUT_DIR").unwrap();
+    let profile = env::var("PROFILE").unwrap();
+
+    let status = Command::new("make")
+        .current_dir(&out_dir)
+        .env("OUT", &out_dir)
+        .env("MODE", if profile == "release" { "opt" } else { "debug" })
+        .arg("-C")
+        .arg(&current_dir)
+        .arg("CC_STATIC_LIBRARY(libminijail.pic.a)")
+        .status()?;
+    if !status.success() {
+        std::process::exit(status.code().unwrap_or(1));
+    }
+    println!("cargo:rustc-link-search=native={}", &out_dir);
+    println!("cargo:rustc-link-lib=static=minijail.pic");
+    Ok(())
+}