From fd78a7dd5c4bb36618f67921ef2564cf8c7f9189 Mon Sep 17 00:00:00 2001
From: Reid Kleckner <reid@kleckner.net>
Date: Mon, 2 Mar 2015 22:00:23 +0000
Subject: [PATCH] cmake: Use MSVC atomics with clang-cl

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231022 91177308-0d34-0410-b5e6-96231b3b80d8
---
 cmake/modules/CheckAtomic.cmake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cmake/modules/CheckAtomic.cmake b/cmake/modules/CheckAtomic.cmake
index 30a5e311292..a03788ec9f9 100644
--- a/cmake/modules/CheckAtomic.cmake
+++ b/cmake/modules/CheckAtomic.cmake
@@ -13,6 +13,7 @@ endif()
 
 CHECK_CXX_SOURCE_COMPILES("
 #ifdef _MSC_VER
+#include <Intrin.h> /* Workaround for PR19898. */
 #include <windows.h>
 #endif
 int main() {