From a41e20a53ca28c93085e33469718450e7063e778 Mon Sep 17 00:00:00 2001
From: LLVM GN Syncbot <llvmgnsyncbot@gmail.com>
Date: Wed, 28 May 2025 16:42:55 +0000
Subject: [PATCH] [gn build] Port 5ab944a8c6a2

---
 llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn b/llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn
index 417396a5471f..951cf56dca6d 100644
--- a/llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn
@@ -320,6 +320,7 @@ copy("Headers") {
     "stdatomic.h",
     "stdbool.h",
     "stdckdint.h",
+    "stdcountof.h",
     "stddef.h",
     "stdint.h",
     "stdnoreturn.h",