From 4f1a7e51c17586487c986a456e39af40b41bf4b4 Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Wed, 30 Mar 2016 17:59:49 -0700
Subject: Pull math functions from the global namespace only when compiling
 cuda code with nvcc. When compiling with clang, we want to use the std
 namespace.

---
 Eigen/Core | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'Eigen')

diff --git a/Eigen/Core b/Eigen/Core
index 8428c51e4..24799f32b 100644
--- a/Eigen/Core
+++ b/Eigen/Core
@@ -42,7 +42,10 @@
   
 #endif
 
-#if defined(__CUDA_ARCH__)
+// When compiling CUDA device code with NVCC, pull in math functions from the
+// global namespace.  In host mode, and when device doee with clang, use the
+// std versions.
+#if defined(__CUDA_ARCH__) && defined(__NVCC__)
   #define EIGEN_USING_STD_MATH(FUNC) using ::FUNC;
 #else
   #define EIGEN_USING_STD_MATH(FUNC) using std::FUNC;
-- 
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