2 files changed, 13 insertions, 0 deletions
diff --git a/build_extra/rust/BUILD.gn b/build_extra/rust/BUILD.gn
index e5a4fec16..0889ad840 100644
--- a/build_extra/rust/BUILD.gn
+++ b/build_extra/rust/BUILD.gn
@@ -13,3 +13,11 @@ rust_component("stdlib") {
     libs = [ "userenv.lib" ]
   }
 }
+
+rust_component("libc") {
+  source_root = "//third_party/rust_crates/libc/src/lib.rs"
+  cfg = [
+    "feature=\"default\"",
+    "feature=\"use_std\"",
+  ]
+}
diff --git a/build_extra/rust/rust.gni b/build_extra/rust/rust.gni
index faa97205b..4c6b4ddd6 100644
--- a/build_extra/rust/rust.gni
+++ b/build_extra/rust/rust.gni
@@ -1,5 +1,10 @@
 stdlib_label = "//build_extra/rust:stdlib"
 
+declare_args() {
+  # Absolute path of rust build files.
+  rust_build = "//build_extra/rust/"
+}
+
 template("run_rustc") {
   action(target_name) {
     assert(defined(invoker.source_root), "Must specify source_root")