From 0667f1b1dc1d1e1b085434511bf463f0a7dfa4d6 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

llvm-svn: 231022
---
 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() {