diff --git a/Src/FEMTree.System.inl b/Src/FEMTree.System.inl
index ae554d4..87f0423 100644
--- a/Src/FEMTree.System.inl
+++ b/Src/FEMTree.System.inl
@@ -792,7 +792,7 @@ void FEMTree< Dim , Real >::_solveRegularMG( UIntPack< FEMSigs ... > , typename
 	}
 }
 
-#if defined( __GNUC__ ) && __GNUC__ < 5
+#if defined( __GNUC__ ) && __GNUC__ < 5 && 0
 #warning "you've got me gcc version<5"
 template< unsigned int Dim , class Real >
 template< unsigned int ... FEMSigs >
@@ -1679,7 +1679,7 @@ SparseMatrix< Real , matrix_index_type > FEMTree< Dim , Real >::systemMatrix( UI
 			typename FEMTreeNode::template ConstNeighbors< OverlapSizes > neighbors;
 			neighborKey.getNeighbors( OverlapRadii() , OverlapRadii() , _sNodes.treeNodes[i] , neighbors );
 
-#if defined( __GNUC__ ) && __GNUC__ < 5
+#if defined( __GNUC__ ) && __GNUC__ < 5 && 0
 			#warning "you've got me gcc version<5"
 				matrix.setRowSize( ii , _getMatrixRowSize( UIntPack< FEMSigs ... >() , neighbors ) );
 #else // !__GNUC__ || __GNUC__ >=5
diff --git a/Src/FEMTree.WeightedSamples.inl b/Src/FEMTree.WeightedSamples.inl
index b263dda..282387e 100644
--- a/Src/FEMTree.WeightedSamples.inl
+++ b/Src/FEMTree.WeightedSamples.inl
@@ -225,7 +225,7 @@ Real FEMTree< Dim , Real >::_splatPointData( Allocator< FEMTreeNode > *nodeAlloc
 
 	width = 1.0 / ( 1<<_localDepth( temp ) );
 	_v = v * weight / Real( pow( width , dim ) ) * Real( dx );
-#if defined( __GNUC__ ) && __GNUC__ < 5
+#if defined( __GNUC__ ) && __GNUC__ < 5 && 0
 #warning "you've got me gcc version<5"
 	_splatPointData< CreateNodes , ThreadSafe , V >( nodeAllocator , temp , position , _v , dataInfo , dataKey );
 #else // !__GNUC__ || __GNUC__ >=5
@@ -238,7 +238,7 @@ Real FEMTree< Dim , Real >::_splatPointData( Allocator< FEMTreeNode > *nodeAlloc
 		width = 1.0 / ( 1<<_localDepth( temp ) );
 
 		_v = v * weight / Real( pow( width , dim ) ) * Real( dx );
-#if defined( __GNUC__ ) && __GNUC__ < 5
+#if defined( __GNUC__ ) && __GNUC__ < 5 && 0
 #warning "you've got me gcc version<5"
 		_splatPointData< CreateNodes , ThreadSafe , V >( nodeAllocator , temp , position , _v , dataInfo , dataKey );
 #else // !__GNUC__ || __GNUC__ >=5
diff --git a/Src/FEMTree.h b/Src/FEMTree.h
index 8aa3b41..0be77a1 100644
--- a/Src/FEMTree.h
+++ b/Src/FEMTree.h
@@ -219,6 +219,7 @@ template< class Data , typename Pack > struct _SparseOrDenseNodeData{};
 template< class Data , unsigned int ... FEMSigs >
 struct _SparseOrDenseNodeData< Data , UIntPack< FEMSigs ... > >
 {
+	virtual ~_SparseOrDenseNodeData() {}
 	static const unsigned int Dim = sizeof ... ( FEMSigs );
 	typedef UIntPack< FEMSigs ... > FEMSignatures;
 	typedef Data data_type;
@@ -1841,7 +1842,7 @@ protected:
 
 	template< unsigned int ... FEMSigs >
 	int _getProlongedMatrixRowSize( const FEMTreeNode* node , const typename FEMTreeNode::template ConstNeighbors< UIntPack< BSplineOverlapSizes< FEMSignature< FEMSigs >::Degree >::OverlapSize ... > >& pNeighbors ) const;
-#if defined( __GNUC__ ) && __GNUC__ < 5
+#if defined( __GNUC__ ) && __GNUC__ < 5 && 0
 	#warning "you've got me gcc version<5"
 		template< unsigned int ... FEMSigs >
 	int _getMatrixRowSize( UIntPack< FEMSigs ... > , const typename FEMTreeNode::template ConstNeighbors< UIntPack< BSplineOverlapSizes< FEMSignature< FEMSigs >::Degree >::OverlapSize ... > >& neighbors ) const;
diff --git a/Src/FEMTree.inl b/Src/FEMTree.inl
index e4c2310..f88316b 100644
--- a/Src/FEMTree.inl
+++ b/Src/FEMTree.inl
@@ -374,7 +374,7 @@ SparseNodeData< OutData , UIntPack< DataSigs ... > > FEMTree< Dim , Real >::setD
 				AddAtomic( weightSum , sample.weight );
 				out *= sample.weight;
 				Allocator< FEMTreeNode > *nodeAllocator = nodeAllocators.size() ? nodeAllocators[ thread ] : NULL;
-#if defined( __GNUC__ ) && __GNUC__ < 5
+#if defined( __GNUC__ ) && __GNUC__ < 5 && 0
 				#warning "you've got me gcc version<5"
 					if( density ) AddAtomic( _pointWeightSum , _splatPointData< true , true , DensityDegree , OutData >( nodeAllocator , *density , p , out , dataField , densityKey , oneKey ? *( (DataKey*)&densityKey ) : dataKey , 0 , maxDepth , Dim , depthBias ) * sample.weight );
 #else // !__GNUC__ || __GNUC__ >=5
@@ -383,7 +383,7 @@
 				else
 				{
 					Real width = (Real)( 1.0 / ( 1<<maxDepth ) );
-#if defined( __GNUC__ ) && __GNUC__ < 5
+#if defined( __GNUC__ ) && __GNUC__ < 5 && 0
 					#warning "you've got me gcc version<5"
 						_splatPointData< true , true , OutData >( nodeAllocator , _leaf< true >( nodeAllocator , p , maxDepth ) , p , out / (Real)pow( width , Dim ) , dataField , oneKey ? *( (DataKey*)&densityKey ) : dataKey );
 #else // !__GNUC__ || __GNUC__ >=5