1 files changed, 20 insertions, 0 deletions
diff --git a/build/rust/mozbuild/build.rs b/build/rust/mozbuild/build.rs
new file mode 100644
index 0000000000..e9fb6b91b0
--- /dev/null
+++ b/build/rust/mozbuild/build.rs
@@ -0,0 +1,20 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use std::path::PathBuf;
+
+fn main() {
+    let out_dir = PathBuf::from(std::env::var_os("OUT_DIR").unwrap());
+    if let Some(topobjdir) = out_dir
+        .ancestors()
+        .find(|dir| dir.join("config.status").exists())
+    {
+        println!(
+            "cargo:rustc-env=BUILDCONFIG_RS={}",
+            topobjdir
+                .join("build/rust/mozbuild/buildconfig.rs")
+                .display()
+        );
+    }
+}