From aca6c3c4f98e9c33b89bc5c07804617bcf36a14e Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 8 Nov 2002 12:26:41 +0000
Subject: [PATCH] Added #define DARWIN_OSX_PRE_10_2 and related #ifdef checks
 to cope with backwards compatiblity with versions of OSX before 10.2.

---
 include/osg/Math | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/include/osg/Math b/include/osg/Math
index 146d3d637..06a24b24e 100644
--- a/include/osg/Math
+++ b/include/osg/Math
@@ -7,6 +7,11 @@
 
 #include <math.h>
 
+// for OSX users :
+// comment in if you want backwards compatibility with 10.1.x versions
+// otherwise you'll have problems with missing floorf and __isnan*()
+// #define DARWIN_OSX_PRE_10_2
+
 #if defined(_MSC_VER) && (_MSC_VER >= 1300)
     #include <float.h>
 #endif
@@ -70,7 +75,7 @@
 #if (defined(WIN32) && !(defined(_MSC_VER) && (_MSC_VER >= 1300)) && !defined(__MINGW32__) ) || \
     defined (sun) || \
     defined (__hpux__) || \
-    defined (__DARWIN_OSX__)
+    defined (DARWIN_OSX_PRE_10_2)
 
     #ifndef floorf
     #define floorf (float)floor
@@ -124,14 +129,13 @@ inline double RadiansToDegrees(double angle) { return angle*180.0/PI; }
     inline bool isNaN(float v) { return _isnan(v)!=0; }
     inline bool isNaN(double v) { return _isnan(v)!=0; }
 #else
-// coment out this special handling for OSX, no longer seems valid.
-//    # if defined(__DARWIN_OSX__)
-//    inline bool isNaN(float v) { return __isnanf(v); }
-//    inline bool isNaN(double v) { return __isnand(v); }
-//    #else
-    inline bool isNaN(float v) { return isnan(v); }
-    inline bool isNaN(double v) { return isnan(v); }
-//    #endif
+    # if defined(__DARWIN_OSX__) && !defined (DARWIN_OSX_PRE_10_2)
+        inline bool isNaN(float v) { return __isnanf(v); }
+        inline bool isNaN(double v) { return __isnand(v); }
+    #else
+        inline bool isNaN(float v) { return isnan(v); }
+        inline bool isNaN(double v) { return isnan(v); }
+    #endif
 #endif