From 9cab0ceb62ffeb94304fd9507722861ec6fb3bb2 Mon Sep 17 00:00:00 2001
From: LLVM GN Syncbot <llvmgnsyncbot@gmail.com>
Date: Wed, 21 Jul 2021 21:45:33 +0000
Subject: [PATCH] [gn build] Port 74fd3cb8cd3e

---
 utils/gn/secondary/libcxx/include/BUILD.gn | 1 +
 1 file changed, 1 insertion(+)

diff --git a/utils/gn/secondary/libcxx/include/BUILD.gn b/utils/gn/secondary/libcxx/include/BUILD.gn
index 21e6e5db89d..67b65de7f84 100644
--- a/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -246,6 +246,7 @@ if (current_toolchain == default_toolchain) {
       "__ranges/all.h",
       "__ranges/concepts.h",
       "__ranges/copyable_box.h",
+      "__ranges/dangling.h",
       "__ranges/data.h",
       "__ranges/drop_view.h",
       "__ranges/empty.h",