1 files changed, 8 insertions, 4 deletions

diff --git a/contrib/libc++/src/algorithm.cpp b/contrib/libc++/src/algorithm.cpp
index f036eb7abe1c..a110ae8b1a6e 100644
--- a/contrib/libc++/src/algorithm.cpp
+++ b/contrib/libc++/src/algorithm.cpp
@@ -1,15 +1,19 @@
 //===----------------------- algorithm.cpp --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #include "algorithm"
 #include "random"
+#ifndef _LIBCPP_HAS_NO_THREADS
 #include "mutex"
+#if defined(__unix__) &&  defined(__ELF__) && defined(_LIBCPP_HAS_COMMENT_LIB_PRAGMA)
+#pragma comment(lib, "pthread")
+#endif
+#endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD