From 8649e16c2a0e548f2f5e442dfa6e2d74462df501 Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Fri, 18 Nov 2016 14:18:34 -0800
Subject: [PATCH] Enable EIGEN_HAS_C99_MATH when building with the latest
 version of Visual Studio

---
 Eigen/src/Core/util/Macros.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index ece64df15..d9387cd82 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -380,7 +380,8 @@
 #if EIGEN_MAX_CPP_VER>=11 && \
     ((defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901))       \
   || (defined(__GNUC__) && defined(_GLIBCXX_USE_C99)) \
-  || (defined(_LIBCPP_VERSION) && !defined(_MSC_VER)))
+  || (defined(_LIBCPP_VERSION) && !defined(_MSC_VER)) \
+  || (EIGEN_COMP_MSVC >= 1900))
   #define EIGEN_HAS_C99_MATH 1
 #else
   #define EIGEN_HAS_C99_MATH 0