From 848b047708c4f9d2067e70021d955128f7f14865 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 29 Oct 2008 11:51:47 +0000
Subject: [PATCH] From Blasius Czink, "changed the CHECK_CXX_SOURCE_RUNS macro
 slightly to avoid the compile problems due to bugged "intrin.h". In such a
 case the mutex fallback will be used (see attached file)."

---
 CMakeModules/CheckAtomicOps.cmake | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/CMakeModules/CheckAtomicOps.cmake b/CMakeModules/CheckAtomicOps.cmake
index 043102322..f0f3cc3f3 100644
--- a/CMakeModules/CheckAtomicOps.cmake
+++ b/CMakeModules/CheckAtomicOps.cmake
@@ -68,8 +68,13 @@ int main(int, const char**)
 
 CHECK_CXX_SOURCE_RUNS("
 #include <windows.h>
+#include <intrin.h>
 #include <cstdlib>
 
+#pragma intrinsic(_InterlockedAnd)
+#pragma intrinsic(_InterlockedOr)
+#pragma intrinsic(_InterlockedXor)
+
 int main(int, const char**)
 {
    volatile long value = 0;