From 4e0cefc640672da0d09081c335aa982b5e7c8207 Mon Sep 17 00:00:00 2001
From: LLVM GN Syncbot <llvmgnsyncbot@gmail.com>
Date: Thu, 22 Jul 2021 18:41:45 +0000
Subject: [PATCH] [gn build] Port 3959c95deb11

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

diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 67b65de..70f38c5 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -253,6 +253,7 @@ if (current_toolchain == default_toolchain) {
       "__ranges/empty_view.h",
       "__ranges/enable_borrowed_range.h",
       "__ranges/enable_view.h",
+      "__ranges/non_propagating_cache.h",
       "__ranges/ref_view.h",
       "__ranges/size.h",
       "__ranges/subrange.h",
-- 
2.7.4