From 476dbf1c33de6361a1b180f641cd8a86bd9e0452 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 2 May 2012 13:58:34 +0000
Subject: [PATCH] Fixed for including cmath before osg/Math.

---
 include/osg/Math | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/include/osg/Math b/include/osg/Math
index 7d85722e6..487255581 100644
--- a/include/osg/Math
+++ b/include/osg/Math
@@ -216,9 +216,14 @@ inline double round(double v) { return v>=0.0?floor(v+0.5):ceil(v-0.5); }
         inline bool isNaN(float v) { return std::isnan(v); }
         inline bool isNaN(double v) { return std::isnan(v); }
     #else
-        // Need to use to std::isnan to avoid undef problem from <cmath>
-        inline bool isNaN(float v) { return isnan(v); }
-        inline bool isNaN(double v) { return isnan(v); }
+        #ifdef isnan
+            inline bool isNaN(float v) { return isnan(v); }
+            inline bool isNaN(double v) { return isnan(v); }
+        #else
+            // Need to use to std::isnan to avoid undef problem from <cmath>
+            inline bool isNaN(float v) { return std::isnan(v); }
+            inline bool isNaN(double v) { return std::isnan(v); }
+        #endif
     #endif
 #endif