From acbb658afeb2364e1fc1994a81e540d8600a3fa7 Mon Sep 17 00:00:00 2001
From: razmyslovich <razmyslovich@volumegraphics.com>
Date: Tue, 10 Jun 2014 13:50:14 +0200
Subject: [PATCH] 0024998: The incorrect _USE_MATH_DEFINES definition in
 Standard_math.hxx prevents the clean build for client applications

Add #ifndef clause to avoid redefinition compile error
---
 src/Standard/Standard_math.hxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Standard/Standard_math.hxx b/src/Standard/Standard_math.hxx
index d3a1a83f73..4fa39d0d1a 100644
--- a/src/Standard/Standard_math.hxx
+++ b/src/Standard/Standard_math.hxx
@@ -18,7 +18,10 @@
 
 #ifdef _MSC_VER
 
+#ifndef _USE_MATH_DEFINES
 #define _USE_MATH_DEFINES
+#endif
+
 #include <math.h>
 
 // MSVC versions prior to 12 did not provided acosh, asinh, atanh functions in standard library