From 80b6e5f2786e80f5123f970d0f8023ddb7ef7b33 Mon Sep 17 00:00:00 2001
From: Hauke Heibel <hauke.heibel@gmail.com>
Date: Mon, 21 Jun 2010 16:43:31 +0200
Subject: [PATCH] Added include reuqired for __cpuid.

---
 Eigen/Core | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Eigen/Core b/Eigen/Core
index 66b3b95da..896f2c8b4 100644
--- a/Eigen/Core
+++ b/Eigen/Core
@@ -118,6 +118,10 @@
   #endif
 #endif
 
+#ifdef _MSC_VER
+  #include <intrin.h> // required for __cpuid
+#endif
+
 #if (defined _OPENMP) && (!defined EIGEN_DONT_PARALLELIZE)
   #define EIGEN_HAS_OPENMP
 #endif