From 09b9e951e36cfd8835a557682f2250f01bbf7051 Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <rmlarsen@google.com>
Date: Wed, 27 Apr 2016 14:59:11 -0700
Subject: [PATCH] Depend on the more extensive support for constexpr in clang:

http://clang.llvm.org/docs/LanguageExtensions.html#c-1y-relaxed-constexpr
---
 Eigen/src/Core/util/Macros.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index 88f86c442..de1265af3 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -374,7 +374,7 @@
 #if __cplusplus > 199711L && defined(__CUDACC_VER__) && (EIGEN_COMP_CLANG || __CUDACC_VER__ >= 70500)
   #define EIGEN_HAS_CONSTEXPR 1
 #endif
-#elif __has_feature(cxx_constexpr) || (defined(__cplusplus) && __cplusplus >= 201402L) || \
+#elif __has_feature(cxx_relaxed_constexpr) || (defined(__cplusplus) && __cplusplus >= 201402L) || \
     EIGEN_GNUC_AT_LEAST(4,8)
 #define EIGEN_HAS_CONSTEXPR 1
 #endif