From a245f9b2637349e713922dc7e5c76e5934356efd Mon Sep 17 00:00:00 2001
From: Eric Fiselier <eric@efcs.ca>
Date: Sat, 6 Dec 2014 20:09:11 +0000
Subject: [PATCH] Improve error message when _LIBCPP_HAS_NO_MONOTONIC_CLOCK is
 used improperly

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@223590 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/__config | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/__config b/include/__config
index df0bb77c0..8fd80bcb7 100644
--- a/include/__config
+++ b/include/__config
@@ -713,4 +713,9 @@ extern "C" void __sanitizer_annotate_contiguous_container(
 #  define _LIBCPP_WEAK __attribute__((__weak__))
 #endif
 
+#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS)
+#  error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \
+         _LIBCPP_HAS_NO_THREADS is defined.
+#endif
+
 #endif  // _LIBCPP_CONFIG