1 files changed, 8 insertions, 0 deletions
diff --git a/third_party/rust/indexmap/build.rs b/third_party/rust/indexmap/build.rs
new file mode 100644
index 0000000000..9f9fa054f8
--- /dev/null
+++ b/third_party/rust/indexmap/build.rs
@@ -0,0 +1,8 @@
+fn main() {
+    // If "std" is explicitly requested, don't bother probing the target for it.
+    match std::env::var_os("CARGO_FEATURE_STD") {
+        Some(_) => autocfg::emit("has_std"),
+        None => autocfg::new().emit_sysroot_crate("std"),
+    }
+    autocfg::rerun_path("build.rs");
+}