From 7c60ccfc359166ea821a326306e0e59637116169 Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Sun, 21 Nov 2004 03:13:54 +0000
Subject: [PATCH] I don't understand why FreeBSD doesn't see isnan() after
 including math.h but it doesn't.  Trying the apple approach to fixing isnan
 results in an infinite loop (making me wonder what happens on OSX?)  This is
 an alternative approach to checking isnan() on freebsd ...

---
 simgear/scene/sky/cloud.cxx       | 7 ++++++-
 simgear/sound/soundmgr_openal.cxx | 6 +++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/simgear/scene/sky/cloud.cxx b/simgear/scene/sky/cloud.cxx
index a2b3b662..e62384b9 100644
--- a/simgear/scene/sky/cloud.cxx
+++ b/simgear/scene/sky/cloud.cxx
@@ -21,7 +21,7 @@
 // #include <stdio.h>
 #include <math.h>
 
-#if defined (__APPLE__) || defined (__FreeBSD__)
+#if defined (__APPLE__)
 // any C++ header file undefines isinf and isnan
 // so this should be included before <iostream>
 inline int (isinf)(double r) { return isinf(r); }
@@ -45,6 +45,11 @@ inline int (isnan)(double r) { return isnan(r); }
 #define isnan(x) _isnan(x)
 #endif
 
+#if defined (__FreeBSD__)
+inline int isnan(double r) { return !(r < 0 || r > 0); }
+#endif
+
+
 
 static ssgStateSelector *layer_states[SGCloudLayer::SG_MAX_CLOUD_COVERAGES];
 static bool state_initialized = false;
diff --git a/simgear/sound/soundmgr_openal.cxx b/simgear/sound/soundmgr_openal.cxx
index 1966259a..0785edb5 100644
--- a/simgear/sound/soundmgr_openal.cxx
+++ b/simgear/sound/soundmgr_openal.cxx
@@ -35,7 +35,7 @@
 # include <AL/alc.h>
 #endif
 
-#if defined (__APPLE__) 
+#if defined (__APPLE__)
 // any C++ header file undefines isinf and isnan
 // so this should be included before <iostream>
 inline int (isinf)(double r) { return isinf(r); }
@@ -46,6 +46,10 @@ inline int (isnan)(double r) { return isnan(r); }
 #define isnan(x) _isnan(x)
 #endif
 
+#if defined (__FreeBSD__)
+inline int isnan(double r) { return !(r < 0 || r > 0); }
+#endif
+
 #include STL_IOSTREAM
 
 #include <simgear/debug/logstream.hxx>
-- 
2.39.2