From ad7e93552d0daf2e3be20a207b047e58c0db0eeb Mon Sep 17 00:00:00 2001
From: Eric Fiselier <eric@efcs.ca>
Date: Tue, 24 Jul 2018 09:15:03 +0000
Subject: [PATCH] Fix use of incorrect _LIBCXX macro (should be _LIBCPP).

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@337817 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/future | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/future b/include/future
index 528091b04..0f6d42678 100644
--- a/include/future
+++ b/include/future
@@ -409,7 +409,7 @@ _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(launch)
 
 #ifndef _LIBCPP_HAS_NO_STRONG_ENUMS
 
-#ifdef _LIBCXX_UNDERLYING_TYPE
+#ifdef _LIBCPP_UNDERLYING_TYPE
 typedef underlying_type<launch>::type __launch_underlying_type;
 #else
 typedef int __launch_underlying_type;