From c03c73c9b7032f984bcd6c52d9ca3a430ce19c69 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 6 Feb 2015 14:26:12 +0100
Subject: [PATCH] Fix clang compilation

---
 unsupported/test/cxx11_tensor_thread_pool.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/unsupported/test/cxx11_tensor_thread_pool.cpp b/unsupported/test/cxx11_tensor_thread_pool.cpp
index e25912279..f49523683 100644
--- a/unsupported/test/cxx11_tensor_thread_pool.cpp
+++ b/unsupported/test/cxx11_tensor_thread_pool.cpp
@@ -15,6 +15,7 @@
 #include <Eigen/CXX11/Tensor>
 
 using Eigen::Tensor;
+using std::isnan;
 
 static void test_multithread_elementwise()
 {