From Eric Sokolowsky, warning fixes for g++ 4.0 under Fedora Core 4.

include/osg/Array

@@ -286,6 +286,7 @@ class ArrayVisitor
 {
     public:
         ArrayVisitor() {}
+        virtual ~ArrayVisitor() {}
         
         virtual void apply(Array&) {}
         virtual void apply(ByteArray&) {}
@@ -315,6 +316,7 @@ class ConstArrayVisitor
 {
     public:
         ConstArrayVisitor() {}
+        virtual ~ConstArrayVisitor() {}
         
         virtual void apply(const Array&) {}
         virtual void apply(const ByteArray&) {}
@@ -345,6 +347,7 @@ class ValueVisitor
 {
     public:
         ValueVisitor() {}
+        virtual ~ValueVisitor() {}
         
         virtual void apply(GLbyte&) {}
         virtual void apply(GLshort&) {}
@@ -374,6 +377,7 @@ class ConstValueVisitor
 {
     public:
         ConstValueVisitor() {}
+        virtual ~ConstValueVisitor() {}
         
         virtual void apply(const GLbyte&) {}
         virtual void apply(const GLshort&) {}

include/osg/Shape

@@ -104,6 +104,7 @@ class ShapeVisitor
     public:
     
     	ShapeVisitor() {}
+        virtual ~ShapeVisitor() {}
     
     	virtual void apply(Sphere&) {}
     	virtual void apply(Box&) {}
@@ -124,6 +125,7 @@ class ConstShapeVisitor
     public:
     
     	ConstShapeVisitor() {}
+        virtual ~ConstShapeVisitor() {}
 
     	virtual void apply(const Sphere&) {}
     	virtual void apply(const Box&) {}

include/osg/StateAttribute

@@ -258,6 +258,7 @@ class OSG_EXPORT StateAttribute : public Object
 
         struct ModeUsage
         {
+            virtual ~ModeUsage() {}
             virtual void usesMode(GLMode mode) = 0;
             virtual void usesTextureMode(GLMode mode) = 0;
         };

include/osgDB/Registry

@@ -31,6 +31,7 @@ namespace osgDB {
 
 /** basic structure for custom runtime inheritance checking */
 struct basic_type_wrapper {
+    virtual ~basic_type_wrapper() {}
     virtual bool matches(const osg::Object *proto) const = 0;
 };
 

include/osgGA/GUIActionAdapter

@@ -54,6 +54,7 @@ then you then respond the flag being set in your own leisure.
 class GUIActionAdapter
 {
 public:
+        virtual ~GUIActionAdapter() {}
         
         /**
         requestRedraw() requests a single redraw.

src/osg/LOD.cpp

@@ -104,7 +104,7 @@ bool LOD::addChild( Node *child )
         if (_children.size()>_rangeList.size()) 
         {
             float maxRange = !_rangeList.empty()?
-                 maxRange=_rangeList.back().second : 0.0f;
+                 _rangeList.back().second : 0.0f;
 
             _rangeList.resize(_children.size(),MinMaxPair(maxRange,maxRange));
         }

src/osgDB/Registry.cpp

@@ -612,6 +612,7 @@ ReaderWriter* Registry::getReaderWriterForExtension(const std::string& ext)
 
 struct concrete_wrapper: basic_type_wrapper 
 {
+    virtual ~concrete_wrapper() {}
     concrete_wrapper(const osg::Object *myobj) : myobj_(myobj) {}
     bool matches(const osg::Object *proto) const
     {

src/osgPlugins/ive/ReadWrite.h

@@ -116,6 +116,7 @@ namespace ive {
 class ReadWrite{
 
 public:
+    virtual ~ReadWrite() {}
     virtual void write(DataOutputStream* out) const = 0;
     virtual void read(DataInputStream* out) const = 0;
 };

src/osgPlugins/lib3ds/ReaderWriter3DS.cpp

@@ -570,7 +570,7 @@ osg::Drawable*   ReaderWriter3DS::ReaderObject::createDrawable(Lib3dsMesh *m,Fac
     // create normals.
     if (_usePerVertexNormals)
     {
-        osg::Vec3Array* osg_normals=osg_normals = new osg::Vec3Array(noVertex);
+        osg::Vec3Array* osg_normals = new osg::Vec3Array(noVertex);
         
         // initialize normal list to zero's.
         for (i=0; i<noVertex; ++i)
@@ -692,7 +692,8 @@ osg::Texture2D*  ReaderWriter3DS::ReaderObject::createTexture(Lib3dsTextureMap *
 
         // what is the wrap mode of the texture.
         osg::Texture2D::WrapMode wm = ((texture->flags)&LIB3DS_NO_TILE) ?
-        osg::Texture2D::CLAMP : wm=osg::Texture2D::REPEAT;
+                osg::Texture2D::CLAMP :
+                osg::Texture2D::REPEAT;
         osg_texture->setWrap(osg::Texture2D::WRAP_S,wm);
         osg_texture->setWrap(osg::Texture2D::WRAP_T,wm);
         osg_texture->setWrap(osg::Texture2D::WRAP_R,wm);

src/osgPlugins/tga/ReaderWriterTGA.cpp

@@ -345,7 +345,7 @@ int *numComponents_ret)
             for (y = 0; y < height; y++)
             {
                 fin.read((char*)linebuf,width*depth);
-                if (fin.gcount() != (unsigned int)width*depth)
+                if (fin.gcount() != (std::streamsize) (width*depth))
                 {
                     tgaerror = ERR_READ;
                     break;
@@ -384,7 +384,7 @@ int *numComponents_ret)
             }
             src = buf;
             fin.read((char*)buf,size);
-            if (fin.gcount() != (unsigned int) size)
+            if (fin.gcount() != (std::streamsize) size)
             {
                 tgaerror = ERR_READ;
                 break;