From 71214fe310655af793b489407ea953d7e629e85e Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Sat, 26 Mar 2016 19:10:18 +0000
Subject: [PATCH] Update for VC12 and 14: allow use of native log1p/expm1.

---
 include/boost/config/compiler/visualc.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/boost/config/compiler/visualc.hpp b/include/boost/config/compiler/visualc.hpp
index baaab589..888932a6 100644
--- a/include/boost/config/compiler/visualc.hpp
+++ b/include/boost/config/compiler/visualc.hpp
@@ -158,6 +158,11 @@
 #  define BOOST_NO_CXX11_DECLTYPE_N3276
 #endif
 
+#if _MSC_FULL_VER >= 180020827
+#define BOOST_HAS_EXPM1
+#define BOOST_HAS_LOG1P
+#endif
+
 // C++11 features supported by VC++ 14 (aka 2015)
 //
 #if (_MSC_FULL_VER < 190023026)