diff -ru OSG_OP_OT-0.9.9/OpenSceneGraph/include/osg/Shader OSG_PATCH/OSG_OP_OT-0.9.9/OpenSceneGraph/include/osg/Shader
--- OSG_OP_OT-0.9.9/OpenSceneGraph/include/osg/Shader	2005-05-12 13:59:53.000000000 -0700
+++ OSG_PATCH/OSG_OP_OT-0.9.9/OpenSceneGraph/include/osg/Shader	2005-09-30 10:19:13.000000000 -0700
@@ -37,6 +37,9 @@
   * configuration.
   */
 
+// Forward declaration to fix gcc4.0.1 build -osb, Delta3D.
+class Program;
+   
 class OSG_EXPORT Shader : public osg::Object
 {
     public:
diff -ru OSG_OP_OT-0.9.9/Producer/include/Producer/Keyboard OSG_PATCH/OSG_OP_OT-0.9.9/Producer/include/Producer/Keyboard
--- OSG_OP_OT-0.9.9/Producer/include/Producer/Keyboard	2005-05-04 08:45:36.000000000 -0700
+++ OSG_PATCH/OSG_OP_OT-0.9.9/Producer/include/Producer/Keyboard	2005-09-30 10:27:44.000000000 -0700
@@ -538,8 +538,7 @@
         unsigned long  _keyModifier;
         KeyboardKey    _key;
 };
-
-
+   
 class PR_EXPORT Keyboard : public Producer::Referenced
 {
     public:
diff -ru OSG_OP_OT-0.9.9/Producer/include/Producer/KeyboardMouse OSG_PATCH/OSG_OP_OT-0.9.9/Producer/include/Producer/KeyboardMouse
--- OSG_OP_OT-0.9.9/Producer/include/Producer/KeyboardMouse	2005-05-03 12:53:06.000000000 -0700
+++ OSG_PATCH/OSG_OP_OT-0.9.9/Producer/include/Producer/KeyboardMouse	2005-09-30 10:27:37.000000000 -0700
@@ -28,6 +28,9 @@
 
 namespace Producer {
 
+// Forward declaration to fix gcc4.0.1 compile -osb, Delta3D.
+class KeyboardMouseImplementation;
+
 class PR_EXPORT KeyboardMouseCallback : public Referenced 
 {
     public :