1 files changed, 28 insertions, 0 deletions
diff --git a/library/stdarch/crates/stdarch-verify/build.rs b/library/stdarch/crates/stdarch-verify/build.rs
new file mode 100644
index 000000000..c0dc81b6a
--- /dev/null
+++ b/library/stdarch/crates/stdarch-verify/build.rs
@@ -0,0 +1,28 @@
+use std::path::Path;
+
+fn main() {
+    let dir = Path::new(env!("CARGO_MANIFEST_DIR"));
+    let root = dir.parent().unwrap();
+    eprintln!("root: {}", root.display());
+    walk(&root.join("core_arch/src/x86"));
+    walk(&root.join("core_arch/src/x86_64"));
+    walk(&root.join("core_arch/src/arm"));
+    walk(&root.join("core_arch/src/aarch64"));
+}
+
+fn walk(root: &Path) {
+    for file in root.read_dir().unwrap() {
+        eprintln!("root: {}", root.display());
+        let file = file.unwrap();
+        if file.file_type().unwrap().is_dir() {
+            walk(&file.path());
+            continue;
+        }
+        let path = file.path();
+        if path.extension().and_then(|s| s.to_str()) != Some("rs") {
+            continue;
+        }
+
+        println!("cargo:rerun-if-changed={}", path.display());
+    }
+}