diff --git a/CMakeLists.txt b/CMakeLists.txt
index d1d9b12de..a7d4089c0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -124,7 +124,8 @@ endif(EIGEN_TEST_NO_EXPLICIT_VECTORIZATION)
 
 option(EIGEN_TEST_C++0x "Enables all C++0x features." OFF)
 
-option(EIGEN_TEST_RVALUE_REF_SUPPORT "Enable rvalue references for unit tests." OFF)
+option(EIGEN_TEST_MAX_WARNING_LEVEL "Sets the warning level to /Wall while building the unit tests." OFF)
+mark_as_advanced(EIGEN_TEST_MAX_WARNING_LEVEL)
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
 
diff --git a/Eigen/src/Array/Functors.h b/Eigen/src/Array/Functors.h
index fd259f7bc..3a7753d04 100644
--- a/Eigen/src/Array/Functors.h
+++ b/Eigen/src/Array/Functors.h
@@ -43,6 +43,8 @@ struct ei_scalar_add_op {
   inline const PacketScalar packetOp(const PacketScalar& a) const
   { return ei_padd(a, ei_pset1(m_other)); }
   const Scalar m_other;
+private:
+  ei_scalar_add_op& operator=(const ei_scalar_add_op&);
 };
 template<typename Scalar>
 struct ei_functor_traits<ei_scalar_add_op<Scalar> >
@@ -128,6 +130,8 @@ struct ei_scalar_pow_op {
   inline ei_scalar_pow_op(const Scalar& exponent) : m_exponent(exponent) {}
   inline Scalar operator() (const Scalar& a) const { return ei_pow(a, m_exponent); }
   const Scalar m_exponent;
+private:
+  ei_scalar_pow_op& operator=(const ei_scalar_pow_op&);
 };
 template<typename Scalar>
 struct ei_functor_traits<ei_scalar_pow_op<Scalar> >
diff --git a/Eigen/src/Array/VectorwiseOp.h b/Eigen/src/Array/VectorwiseOp.h
index 71b83eaad..92e5cc000 100644
--- a/Eigen/src/Array/VectorwiseOp.h
+++ b/Eigen/src/Array/VectorwiseOp.h
@@ -147,6 +147,8 @@ struct ei_member_redux {
   inline result_type operator()(const MatrixBase<Derived>& mat) const
   { return mat.redux(m_functor); }
   const BinaryOp m_functor;
+private:
+  ei_member_redux& operator=(const ei_member_redux&);
 };
 
 /** \array_module \ingroup Array_Module
diff --git a/Eigen/src/Cholesky/LDLT.h b/Eigen/src/Cholesky/LDLT.h
index d0f292634..2898d8747 100644
--- a/Eigen/src/Cholesky/LDLT.h
+++ b/Eigen/src/Cholesky/LDLT.h
@@ -275,6 +275,8 @@ struct ei_solve_retval<LDLT<_MatrixType>, Rhs>
     dst = rhs();
     dec().solveInPlace(dst);
   }
+private:
+  ei_solve_retval& operator=(const ei_solve_retval&);
 };
 
 /** This is the \em in-place version of solve().
diff --git a/Eigen/src/Cholesky/LLT.h b/Eigen/src/Cholesky/LLT.h
index ad737aaeb..871530aef 100644
--- a/Eigen/src/Cholesky/LLT.h
+++ b/Eigen/src/Cholesky/LLT.h
@@ -270,6 +270,8 @@ struct ei_solve_retval<LLT<_MatrixType, UpLo>, Rhs>
     dst = rhs();
     dec().solveInPlace(dst);
   }
+private:
+  ei_solve_retval_base& operator=(const ei_solve_retval_base&);
 };
 
 /** This is the \em in-place version of solve().
diff --git a/Eigen/src/Core/Flagged.h b/Eigen/src/Core/Flagged.h
index 754eaf6c5..b98861f42 100644
--- a/Eigen/src/Core/Flagged.h
+++ b/Eigen/src/Core/Flagged.h
@@ -111,6 +111,9 @@ template<typename ExpressionType, unsigned int Added, unsigned int Removed> clas
 
   protected:
     ExpressionTypeNested m_matrix;
+
+  private:
+    Flagged& operator=(const Flagged&);
 };
 
 /** \deprecated it is only used by lazy() which is deprecated
diff --git a/Eigen/src/Core/SelfAdjointView.h b/Eigen/src/Core/SelfAdjointView.h
index 95ce666c9..9518a6498 100644
--- a/Eigen/src/Core/SelfAdjointView.h
+++ b/Eigen/src/Core/SelfAdjointView.h
@@ -150,8 +150,10 @@ template<typename MatrixType, unsigned int UpLo> class SelfAdjointView
     const LDLT<PlainMatrixType> ldlt() const;
 
   protected:
-
     const typename MatrixType::Nested m_matrix;
+
+  private:
+    SelfAdjointView& operator=(const SelfAdjointView&);
 };
 
 
diff --git a/Eigen/src/Core/util/Memory.h b/Eigen/src/Core/util/Memory.h
index bc5235582..1bff682ff 100644
--- a/Eigen/src/Core/util/Memory.h
+++ b/Eigen/src/Core/util/Memory.h
@@ -210,15 +210,15 @@ template<typename T, bool Align> inline void ei_conditional_aligned_delete(T *pt
 }
 
 /** \internal \returns the number of elements which have to be skipped such that data are 16 bytes aligned */
-template<typename Scalar>
-inline static int ei_alignmentOffset(const Scalar* ptr, int maxOffset)
+template<typename Scalar, typename Integer>
+inline static Integer ei_alignmentOffset(const Scalar* ptr, Integer maxOffset)
 {
   typedef typename ei_packet_traits<Scalar>::type Packet;
-  const int PacketSize = ei_packet_traits<Scalar>::size;
-  const int PacketAlignedMask = PacketSize-1;
+  const Integer PacketSize = ei_packet_traits<Scalar>::size;
+  const Integer PacketAlignedMask = PacketSize-1;
   const bool Vectorized = PacketSize>1;
   return Vectorized
-          ? std::min<int>( (PacketSize - (int((size_t(ptr)/sizeof(Scalar))) & PacketAlignedMask))
+          ? std::min<Integer>( (PacketSize - (Integer((Integer(ptr)/sizeof(Scalar))) & PacketAlignedMask))
                            & PacketAlignedMask, maxOffset)
           : 0;
 }
diff --git a/Eigen/src/Geometry/Homogeneous.h b/Eigen/src/Geometry/Homogeneous.h
index ffa828f71..f2a2fe73e 100644
--- a/Eigen/src/Geometry/Homogeneous.h
+++ b/Eigen/src/Geometry/Homogeneous.h
@@ -241,6 +241,8 @@ struct ei_homogeneous_left_product_impl<Homogeneous<MatrixType,Vertical>,Lhs>
 
   const typename Lhs::Nested m_lhs;
   const typename MatrixType::Nested m_rhs;
+private:
+  ei_homogeneous_left_product_impl& operator=(const ei_homogeneous_left_product_impl&);
 };
 
 template<typename MatrixType,typename Rhs>
@@ -280,6 +282,8 @@ struct ei_homogeneous_right_product_impl<Homogeneous<MatrixType,Horizontal>,Rhs>
   const typename MatrixType::Nested m_lhs;
   const typename Rhs::Nested m_rhs;
 
+private:
+  ei_homogeneous_right_product_impl& operator=(const ei_homogeneous_right_product_impl&);
 };
 
 #endif // EIGEN_HOMOGENEOUS_H
diff --git a/Eigen/src/LU/FullPivLU.h b/Eigen/src/LU/FullPivLU.h
index 1358c9490..5505d3bee 100644
--- a/Eigen/src/LU/FullPivLU.h
+++ b/Eigen/src/LU/FullPivLU.h
@@ -562,6 +562,9 @@ struct ei_kernel_retval<FullPivLU<_MatrixType> >
     for(int i = rank(); i < cols; ++i) dst.row(dec().permutationQ().indices().coeff(i)).setZero();
     for(int k = 0; k < dimker; ++k) dst.coeffRef(dec().permutationQ().indices().coeff(rank()+k), k) = Scalar(1);
   }
+
+private:
+  ei_kernel_retval& operator=(const ei_kernel_retval&);
 };
 
 /***** Implementation of image() *****************************************************/
@@ -599,6 +602,9 @@ struct ei_image_retval<FullPivLU<_MatrixType> >
     for(int i = 0; i < rank(); ++i)
       dst.col(i) = originalMatrix().col(dec().permutationQ().indices().coeff(pivots.coeff(i)));
   }
+
+private:
+  ei_image_retval& operator=(const ei_image_retval&);
 };
 
 /***** Implementation of solve() *****************************************************/
@@ -659,6 +665,9 @@ struct ei_solve_retval<FullPivLU<_MatrixType>, Rhs>
     for(int i = nonzero_pivots; i < dec().matrixLU().cols(); ++i)
       dst.row(dec().permutationQ().indices().coeff(i)).setZero();
   }
+
+private:
+  ei_solve_retval& operator=(const ei_solve_retval&);
 };
 
 /******* MatrixBase methods *****************************************************************/
diff --git a/Eigen/src/LU/Inverse.h b/Eigen/src/LU/Inverse.h
index 8afbfda96..c31b3502e 100644
--- a/Eigen/src/LU/Inverse.h
+++ b/Eigen/src/LU/Inverse.h
@@ -258,6 +258,8 @@ struct ei_inverse_impl : public ReturnByValue<ei_inverse_impl<MatrixType> >
   {
     ei_compute_inverse<MatrixTypeNestedCleaned, Dest>::run(m_matrix, dst);
   }
+private:
+  ei_inverse_impl& operator=(const ei_inverse_impl&);
 };
 
 /** \lu_module
diff --git a/Eigen/src/QR/HouseholderQR.h b/Eigen/src/QR/HouseholderQR.h
index 95496b943..3b174a873 100644
--- a/Eigen/src/QR/HouseholderQR.h
+++ b/Eigen/src/QR/HouseholderQR.h
@@ -237,6 +237,8 @@ struct ei_solve_retval<HouseholderQR<_MatrixType>, Rhs>
     dst.corner(TopLeft, rank, c.cols()) = c.corner(TopLeft, rank, c.cols());
     dst.corner(BottomLeft, cols-rank, c.cols()).setZero();
   }
+private:
+  ei_solve_retval& operator=(const ei_solve_retval&);
 };
 
 #endif // EIGEN_HIDE_HEAVY_CODE
diff --git a/Eigen/src/SVD/SVD.h b/Eigen/src/SVD/SVD.h
index 3c7aaf322..a90704cb9 100644
--- a/Eigen/src/SVD/SVD.h
+++ b/Eigen/src/SVD/SVD.h
@@ -190,7 +190,7 @@ SVD<MatrixType>& SVD<MatrixType>::compute(const MatrixType& matrix)
   SingularValuesType& W = m_sigma;
 
   bool flag;
-  int i,its,j,k,l,nm;
+  int i=0,its=0,j=0,k=0,l=0,nm=0;
   Scalar anorm, c, f, g, h, s, scale, x, y, z;
   bool convergence = true;
   Scalar eps = dummy_precision<Scalar>();
@@ -456,6 +456,8 @@ struct ei_solve_retval<SVD<_MatrixType>, Rhs>
       dst.col(j) = dec().matrixV() * dst.col(j);
     }
   }
+private:
+  ei_solve_retval& operator=(const ei_solve_retval&);
 };
 
 /** Computes the polar decomposition of the matrix, as a product unitary x positive.
diff --git a/Eigen/src/Sparse/CompressedStorage.h b/Eigen/src/Sparse/CompressedStorage.h
index fcf5c7bfe..b25b05e91 100644
--- a/Eigen/src/Sparse/CompressedStorage.h
+++ b/Eigen/src/Sparse/CompressedStorage.h
@@ -93,7 +93,7 @@ class CompressedStorage
 
     void append(const Scalar& v, int i)
     {
-      int id = m_size;
+      int id = static_cast<int>(m_size);
       resize(m_size+1, 1);
       m_values[id] = v;
       m_indices[id] = i;
@@ -135,7 +135,7 @@ class CompressedStorage
         else
           end = mid;
       }
-      return start;
+      return static_cast<int>(start);
     }
     
     /** \returns the stored value at index \a key
diff --git a/Eigen/src/Sparse/DynamicSparseMatrix.h b/Eigen/src/Sparse/DynamicSparseMatrix.h
index 189a56bd0..f4f83533a 100644
--- a/Eigen/src/Sparse/DynamicSparseMatrix.h
+++ b/Eigen/src/Sparse/DynamicSparseMatrix.h
@@ -88,7 +88,7 @@ class DynamicSparseMatrix
     inline int rows() const { return IsRowMajor ? outerSize() : m_innerSize; }
     inline int cols() const { return IsRowMajor ? m_innerSize : outerSize(); }
     inline int innerSize() const { return m_innerSize; }
-    inline int outerSize() const { return m_data.size(); }
+    inline int outerSize() const { return static_cast<int>(m_data.size()); }
     inline int innerNonZeros(int j) const { return m_data[j].size(); }
 
     std::vector<CompressedStorage<Scalar> >& _data() { return m_data; }
@@ -128,7 +128,7 @@ class DynamicSparseMatrix
     {
       int res = 0;
       for (int j=0; j<outerSize(); ++j)
-        res += m_data[j].size();
+        res += static_cast<int>(m_data[j].size());
       return res;
     }
 
@@ -195,7 +195,7 @@ class DynamicSparseMatrix
       const int inner = IsRowMajor ? col : row;
 
       int startId = 0;
-      int id = m_data[outer].size() - 1;
+      int id = static_cast<int>(m_data[outer].size()) - 1;
       m_data[outer].resize(id+2,1);
 
       while ( (id >= startId) && (m_data[outer].index(id) > inner) )
diff --git a/Eigen/src/Sparse/RandomSetter.h b/Eigen/src/Sparse/RandomSetter.h
index 50824eba1..b34ca19a8 100644
--- a/Eigen/src/Sparse/RandomSetter.h
+++ b/Eigen/src/Sparse/RandomSetter.h
@@ -322,7 +322,7 @@ class RandomSetter
     {
       int nz = 0;
       for (int k=0; k<m_outerPackets; ++k)
-        nz += m_hashmaps[k].size();
+        nz += static_cast<int>(m_hashmaps[k].size());
       return nz;
     }
 
diff --git a/Eigen/src/Sparse/SparseBlock.h b/Eigen/src/Sparse/SparseBlock.h
index 6659a88e2..1fe919736 100644
--- a/Eigen/src/Sparse/SparseBlock.h
+++ b/Eigen/src/Sparse/SparseBlock.h
@@ -220,6 +220,8 @@ class SparseInnerVectorSet<SparseMatrix<_Scalar, _Options>, Size>
         inline int col() const { return IsRowMajor ? this->index() : m_outer; }
       protected:
         int m_outer;
+      private:
+        InnerIterator& operator=(const InnerIterator&);
     };
 
     inline SparseInnerVectorSet(const MatrixType& matrix, int outerStart, int outerSize)
diff --git a/Eigen/src/Sparse/SparseCwise.h b/Eigen/src/Sparse/SparseCwise.h
index bf8f2355c..c2e302956 100644
--- a/Eigen/src/Sparse/SparseCwise.h
+++ b/Eigen/src/Sparse/SparseCwise.h
@@ -156,6 +156,9 @@ template<typename ExpressionType> class SparseCwise
 
   protected:
     ExpressionTypeNested m_matrix;
+
+  private:
+    SparseCwise& operator=(const SparseCwise&);
 };
 
 template<typename Derived>
diff --git a/Eigen/src/Sparse/SparseCwiseBinaryOp.h b/Eigen/src/Sparse/SparseCwiseBinaryOp.h
index 2dcd6b944..bb93b60ef 100644
--- a/Eigen/src/Sparse/SparseCwiseBinaryOp.h
+++ b/Eigen/src/Sparse/SparseCwiseBinaryOp.h
@@ -126,6 +126,9 @@ class SparseCwiseBinaryOp<BinaryOp,Lhs,Rhs>::InnerIterator
     EIGEN_STRONG_INLINE InnerIterator(const SparseCwiseBinaryOp& binOp, int outer)
       : Base(binOp,outer)
     {}
+
+  private:
+    InnerIterator& operator=(const InnerIterator&);
 };
 
 /***************************************************************************
@@ -197,6 +200,8 @@ class ei_sparse_cwise_binary_op_inner_iterator_selector<BinaryOp, Lhs, Rhs, Deri
     const BinaryOp& m_functor;
     Scalar m_value;
     int m_id;
+  private:
+    ei_sparse_cwise_binary_op_inner_iterator_selector& operator=(const ei_sparse_cwise_binary_op_inner_iterator_selector&);
 };
 
 // sparse - sparse  (product)
@@ -250,6 +255,8 @@ class ei_sparse_cwise_binary_op_inner_iterator_selector<ei_scalar_product_op<T>,
     LhsIterator m_lhsIter;
     RhsIterator m_rhsIter;
     const BinaryFunc& m_functor;
+  private:
+    ei_sparse_cwise_binary_op_inner_iterator_selector& operator=(const ei_sparse_cwise_binary_op_inner_iterator_selector&);
 };
 
 // sparse - dense  (product)
diff --git a/Eigen/src/Sparse/SparseCwiseUnaryOp.h b/Eigen/src/Sparse/SparseCwiseUnaryOp.h
index 9a73374bd..9c102ed64 100644
--- a/Eigen/src/Sparse/SparseCwiseUnaryOp.h
+++ b/Eigen/src/Sparse/SparseCwiseUnaryOp.h
@@ -90,6 +90,9 @@ class SparseCwiseUnaryOp<UnaryOp,MatrixType>::InnerIterator
   protected:
     MatrixTypeIterator m_iter;
     const UnaryOp m_functor;
+
+  private:
+    InnerIterator& operator=(const InnerIterator&);
 };
 
 template<typename Derived>
diff --git a/Eigen/src/Sparse/SparseDiagonalProduct.h b/Eigen/src/Sparse/SparseDiagonalProduct.h
index e9ba47f70..24f724ad1 100644
--- a/Eigen/src/Sparse/SparseDiagonalProduct.h
+++ b/Eigen/src/Sparse/SparseDiagonalProduct.h
@@ -133,6 +133,8 @@ class ei_sparse_diagonal_product_inner_iterator_selector
               const SparseDiagonalProductType& expr, int outer)
       : Base(expr.rhs().innerVector(outer) .cwise()* expr.lhs().diagonal(), 0)
     {}
+  private:
+    ei_sparse_diagonal_product_inner_iterator_selector& operator=(const ei_sparse_diagonal_product_inner_iterator_selector&);
 };
 
 template<typename Lhs, typename Rhs, typename SparseDiagonalProductType>
@@ -165,6 +167,8 @@ class ei_sparse_diagonal_product_inner_iterator_selector
               const SparseDiagonalProductType& expr, int outer)
       : Base(expr.lhs().innerVector(outer) .cwise()* expr.rhs().diagonal().transpose(), 0)
     {}
+  private:
+    ei_sparse_diagonal_product_inner_iterator_selector& operator=(const ei_sparse_diagonal_product_inner_iterator_selector&);
 };
 
 // SparseMatrixBase functions
diff --git a/Eigen/src/Sparse/SparseFlagged.h b/Eigen/src/Sparse/SparseFlagged.h
index 386a80abc..34233e5a1 100644
--- a/Eigen/src/Sparse/SparseFlagged.h
+++ b/Eigen/src/Sparse/SparseFlagged.h
@@ -64,6 +64,9 @@ template<typename ExpressionType, unsigned int Added, unsigned int Removed> clas
 
   protected:
     ExpressionTypeNested m_matrix;
+
+  private:
+    SparseFlagged& operator=(const SparseFlagged&);
 };
 
 template<typename ExpressionType, unsigned int Added, unsigned int Removed>
@@ -74,6 +77,9 @@ template<typename ExpressionType, unsigned int Added, unsigned int Removed>
     EIGEN_STRONG_INLINE InnerIterator(const SparseFlagged& xpr, int outer)
       : ExpressionType::InnerIterator(xpr.m_matrix, outer)
     {}
+
+  private:
+    InnerIterator& operator=(const InnerIterator&);
 };
 
 template<typename ExpressionType, unsigned int Added, unsigned int Removed>
diff --git a/Eigen/src/Sparse/SparseMatrix.h b/Eigen/src/Sparse/SparseMatrix.h
index 36fa123fb..e1c740cdb 100644
--- a/Eigen/src/Sparse/SparseMatrix.h
+++ b/Eigen/src/Sparse/SparseMatrix.h
@@ -138,7 +138,7 @@ class SparseMatrix
     }
 
     /** \returns the number of non zero coefficients */
-    inline int nonZeros() const  { return m_data.size(); }
+    inline int nonZeros() const  { return static_cast<int>(m_data.size()); }
 
     /** \deprecated use setZero() and reserve()
       * Initializes the filling process of \c *this.
@@ -236,7 +236,7 @@ class SparseMatrix
         // we start a new inner vector
         while (previousOuter>=0 && m_outerIndex[previousOuter]==0)
         {
-          m_outerIndex[previousOuter] = m_data.size();
+          m_outerIndex[previousOuter] = static_cast<int>(m_data.size());
           --previousOuter;
         }
         m_outerIndex[outer+1] = m_outerIndex[outer];
@@ -335,7 +335,7 @@ class SparseMatrix
       */
     inline void finalize()
     {
-      int size = m_data.size();
+      int size = static_cast<int>(m_data.size());
       int i = m_outerSize;
       // find the last filled column
       while (i>=0 && m_outerIndex[i]==0)
@@ -557,6 +557,9 @@ class SparseMatrix<Scalar,_Options>::InnerIterator
     int m_id;
     const int m_start;
     const int m_end;
+
+  private:
+    InnerIterator& operator=(const InnerIterator&);
 };
 
 #endif // EIGEN_SPARSEMATRIX_H
diff --git a/Eigen/src/Sparse/SparseTranspose.h b/Eigen/src/Sparse/SparseTranspose.h
index 9a702739d..2689caf79 100644
--- a/Eigen/src/Sparse/SparseTranspose.h
+++ b/Eigen/src/Sparse/SparseTranspose.h
@@ -62,6 +62,9 @@ template<typename MatrixType> class SparseTranspose
 
   protected:
     const typename MatrixType::Nested m_matrix;
+
+  private:
+    SparseTranspose& operator=(const SparseTranspose&);
 };
 
 template<typename MatrixType> class SparseTranspose<MatrixType>::InnerIterator : public MatrixType::InnerIterator
@@ -74,6 +77,9 @@ template<typename MatrixType> class SparseTranspose<MatrixType>::InnerIterator :
     {}
     inline int row() const { return Base::col(); }
     inline int col() const { return Base::row(); }
+
+  private:
+    InnerIterator& operator=(const InnerIterator&);
 };
 
 template<typename MatrixType> class SparseTranspose<MatrixType>::ReverseInnerIterator : public MatrixType::ReverseInnerIterator
diff --git a/Eigen/src/Sparse/SparseTriangular.h b/Eigen/src/Sparse/SparseTriangular.h
index 42e7ff02a..c3d3ea48f 100644
--- a/Eigen/src/Sparse/SparseTriangular.h
+++ b/Eigen/src/Sparse/SparseTriangular.h
@@ -47,6 +47,9 @@ template<typename ExpressionType, int Mode> class SparseTriangular
     
   protected:
     ExpressionTypeNested m_matrix;
+
+  private:
+    SparseTriangular& operator=(const SparseTriangular&);
 };
 
 template<typename Derived>
diff --git a/Eigen/src/Sparse/SparseVector.h b/Eigen/src/Sparse/SparseVector.h
index 1fa1980b2..b87cae856 100644
--- a/Eigen/src/Sparse/SparseVector.h
+++ b/Eigen/src/Sparse/SparseVector.h
@@ -125,7 +125,7 @@ class SparseVector
     inline void setZero() { m_data.clear(); }
 
     /** \returns the number of non zero coefficients */
-    inline int nonZeros() const  { return m_data.size(); }
+    inline int nonZeros() const  { return static_cast<int>(m_data.size()); }
 
     inline void startVec(int outer)
     {
@@ -374,13 +374,13 @@ class SparseVector<Scalar,_Options>::InnerIterator
 {
   public:
     InnerIterator(const SparseVector& vec, int outer=0)
-      : m_data(vec.m_data), m_id(0), m_end(m_data.size())
+      : m_data(vec.m_data), m_id(0), m_end(static_cast<int>(m_data.size()))
     {
       ei_assert(outer==0);
     }
 
     InnerIterator(const CompressedStorage<Scalar>& data)
-      : m_data(data), m_id(0), m_end(m_data.size())
+      : m_data(data), m_id(0), m_end(static_cast<int>(m_data.size()))
     {}
 
     template<unsigned int Added, unsigned int Removed>
diff --git a/Eigen/src/misc/Image.h b/Eigen/src/misc/Image.h
index 9ed5d5f70..05ffa667c 100644
--- a/Eigen/src/misc/Image.h
+++ b/Eigen/src/misc/Image.h
@@ -67,9 +67,12 @@ template<typename _DecompositionType> struct ei_image_retval_base
   }
 
   protected:
-  const DecompositionType& m_dec;
-  int m_rank, m_cols;
-  const MatrixType& m_originalMatrix;
+    const DecompositionType& m_dec;
+    int m_rank, m_cols;
+    const MatrixType& m_originalMatrix;
+
+  private:
+    ei_image_retval_base& operator=(const ei_image_retval_base&);
 };
 
 #define EIGEN_MAKE_IMAGE_HELPERS(DecompositionType) \
diff --git a/Eigen/src/misc/Kernel.h b/Eigen/src/misc/Kernel.h
index 717eef450..bb8458e11 100644
--- a/Eigen/src/misc/Kernel.h
+++ b/Eigen/src/misc/Kernel.h
@@ -67,8 +67,11 @@ template<typename _DecompositionType> struct ei_kernel_retval_base
   }
 
   protected:
-  const DecompositionType& m_dec;
-  int m_rank, m_cols;
+    const DecompositionType& m_dec;
+    int m_rank, m_cols;
+
+  private:
+    ei_kernel_retval_base& operator=(const ei_kernel_retval_base&);
 };
 
 #define EIGEN_MAKE_KERNEL_HELPERS(DecompositionType) \
diff --git a/Eigen/src/misc/Solve.h b/Eigen/src/misc/Solve.h
index d93869121..75597564b 100644
--- a/Eigen/src/misc/Solve.h
+++ b/Eigen/src/misc/Solve.h
@@ -61,8 +61,11 @@ template<typename _DecompositionType, typename Rhs> struct ei_solve_retval_base
   }
 
   protected:
-  const DecompositionType& m_dec;
-  const typename Rhs::Nested m_rhs;
+    const DecompositionType& m_dec;
+    const typename Rhs::Nested m_rhs;
+
+  private:
+    ei_solve_retval_base& operator=(const ei_solve_retval_base&);
 };
 
 #define EIGEN_MAKE_SOLVE_HELPERS(DecompositionType,Rhs) \
diff --git a/cmake/EigenTesting.cmake b/cmake/EigenTesting.cmake
index 8e52152e4..bb1da41de 100644
--- a/cmake/EigenTesting.cmake
+++ b/cmake/EigenTesting.cmake
@@ -222,9 +222,12 @@ if(CMAKE_COMPILER_IS_GNUCXX)
   else(EIGEN_COVERAGE_TESTING)
     set(COVERAGE_FLAGS "")
   endif(EIGEN_COVERAGE_TESTING)
-  if(EIGEN_TEST_RVALUE_REF_SUPPORT OR EIGEN_TEST_C++0x)
+  if(EIGEN_TEST_C++0x)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++0x")
-  endif(EIGEN_TEST_RVALUE_REF_SUPPORT OR EIGEN_TEST_C++0x)
+  endif(EIGEN_TEST_C++0x)
+  if(EIGEN_TEST_MAX_WARNING_LEVEL)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wconversion")
+  endif(EIGEN_TEST_MAX_WARNING_LEVEL)  
   if(CMAKE_SYSTEM_NAME MATCHES Linux)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${COVERAGE_FLAGS} -g2")
     set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${COVERAGE_FLAGS} -O2 -g2")
@@ -232,5 +235,8 @@ if(CMAKE_COMPILER_IS_GNUCXX)
     set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COVERAGE_FLAGS} -O0 -g3")
   endif(CMAKE_SYSTEM_NAME MATCHES Linux)
 elseif(MSVC)
-  set(CMAKE_CXX_FLAGS_DEBUG "/D_DEBUG /MDd /Zi /Ob0 /Od" CACHE STRING "Flags used by the compiler during debug builds." FORCE)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D_CRT_SECURE_NO_WARNINGS /D_SCL_SECURE_NO_WARNINGS")
+  if(EIGEN_TEST_MAX_WARNING_LEVEL)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
+  endif(EIGEN_TEST_MAX_WARNING_LEVEL)
 endif(CMAKE_COMPILER_IS_GNUCXX)
diff --git a/test/sparse_basic.cpp b/test/sparse_basic.cpp
index 050b14995..009cc5ae2 100644
--- a/test/sparse_basic.cpp
+++ b/test/sparse_basic.cpp
@@ -34,7 +34,7 @@ bool test_random_setter(SparseMatrix<Scalar,Options>& sm, const DenseType& ref,
     std::vector<Vector2i> remaining = nonzeroCoords;
     while(!remaining.empty())
     {
-      int i = ei_random<int>(0,remaining.size()-1);
+      int i = ei_random<int>(0,static_cast<int>(remaining.size())-1);
       w(remaining[i].x(),remaining[i].y()) = ref.coeff(remaining[i].x(),remaining[i].y());
       remaining[i] = remaining.back();
       remaining.pop_back();
@@ -50,7 +50,7 @@ bool test_random_setter(DynamicSparseMatrix<T>& sm, const DenseType& ref, const
   std::vector<Vector2i> remaining = nonzeroCoords;
   while(!remaining.empty())
   {
-    int i = ei_random<int>(0,remaining.size()-1);
+    int i = ei_random<int>(0,static_cast<int>(remaining.size())-1);
     sm.coeffRef(remaining[i].x(),remaining[i].y()) = ref.coeff(remaining[i].x(),remaining[i].y());
     remaining[i] = remaining.back();
     remaining.pop_back();
diff --git a/unsupported/Eigen/FFT b/unsupported/Eigen/FFT
index fc2efc1d6..a43cd8d97 100644
--- a/unsupported/Eigen/FFT
+++ b/unsupported/Eigen/FFT
@@ -160,7 +160,7 @@ class FFT
         dst.resize( (src.size()>>1)+1);
       else
         dst.resize(src.size());
-      fwd(&dst[0],&src[0],src.size());
+      fwd(&dst[0],&src[0],static_cast<int>(src.size()));
     }
 
     template<typename InputDerived, typename ComplexDerived>
@@ -224,7 +224,7 @@ class FFT
         dst.resize( 2*(src.size()-1) );
       else
         dst.resize( src.size() );
-      inv( &dst[0],&src[0],dst.size() );
+      inv( &dst[0],&src[0],static_cast<int>(dst.size()) );
     }
 
     // TODO: multi-dimensional FFTs
diff --git a/unsupported/Eigen/src/BVH/BVAlgorithms.h b/unsupported/Eigen/src/BVH/BVAlgorithms.h
index 47c49be7f..63725763a 100644
--- a/unsupported/Eigen/src/BVH/BVAlgorithms.h
+++ b/unsupported/Eigen/src/BVH/BVAlgorithms.h
@@ -74,6 +74,8 @@ struct ei_intersector_helper1
   bool intersectObject(const Object1 &obj) { return intersector.intersectObjectObject(obj, stored); }
   Object2 stored;
   Intersector &intersector;
+private:
+  ei_intersector_helper1& operator=(const ei_intersector_helper1&);
 };
 
 template<typename Volume2, typename Object2, typename Object1, typename Intersector>
@@ -216,6 +218,8 @@ struct ei_minimizer_helper2
   Scalar minimumOnObject(const Object2 &obj) { return minimizer.minimumOnObjectObject(stored, obj); }
   Object1 stored;
   Minimizer &minimizer;
+private:
+  ei_minimizer_helper2& operator=(const ei_minimizer_helper2&);
 };
 
 /**  Given two BVH's, runs the query on their cartesian product encapsulated by \a minimizer.
diff --git a/unsupported/Eigen/src/BVH/KdBVH.h b/unsupported/Eigen/src/BVH/KdBVH.h
index ec47254af..c4719607f 100644
--- a/unsupported/Eigen/src/BVH/KdBVH.h
+++ b/unsupported/Eigen/src/BVH/KdBVH.h
@@ -107,7 +107,7 @@ public:
     children.clear();
 
     objects.insert(objects.end(), begin, end);
-    int n = objects.size();
+    int n = static_cast<int>(objects.size());
 
     if(n < 2)
       return; //if we have at most one object, we don't need any internal nodes
@@ -149,7 +149,7 @@ public:
       return;
     }
 
-    int numBoxes = boxes.size();
+    int numBoxes = static_cast<int>(boxes.size());
 
     int idx = index * 2;
     if(children[idx + 1] < numBoxes) { //second index is always bigger
diff --git a/unsupported/Eigen/src/FFT/ei_kissfft_impl.h b/unsupported/Eigen/src/FFT/ei_kissfft_impl.h
index 2dff2bd00..dbd92132e 100644
--- a/unsupported/Eigen/src/FFT/ei_kissfft_impl.h
+++ b/unsupported/Eigen/src/FFT/ei_kissfft_impl.h
@@ -247,7 +247,7 @@ struct ei_kiss_cpx_fft
       int u,k,q1,q;
       Complex * twiddles = &m_twiddles[0];
       Complex t;
-      int Norig = m_twiddles.size();
+      int Norig = static_cast<int>(m_twiddles.size());
       Complex * scratchbuf = &m_scratchBuf[0];
 
       for ( u=0; u<m; ++u ) {
@@ -262,7 +262,7 @@ struct ei_kiss_cpx_fft
           int twidx=0;
           Fout[ k ] = scratchbuf[0];
           for (q=1;q<p;++q ) {
-            twidx += fstride * k;
+            twidx += static_cast<int>(fstride) * k;
             if (twidx>=Norig) twidx-=Norig;
             t=scratchbuf[q] * twiddles[twidx];
             Fout[ k ] += t;
diff --git a/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h b/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
index add000c44..9c0d2e53f 100644
--- a/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
+++ b/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
@@ -292,7 +292,7 @@ void MatrixExponential<MatrixType>::computeUV(float)
   } else {
     const float maxnorm = 3.925724783138660f;
     m_squarings = std::max(0, (int)ceil(log2(m_l1norm / maxnorm)));
-    MatrixType A = *m_M / std::pow(Scalar(2), Scalar(m_squarings));
+    MatrixType A = *m_M / std::pow(Scalar(2), Scalar(static_cast<RealScalar>(m_squarings)));
     pade7(A);
   }
 }
diff --git a/unsupported/test/Complex.cpp b/unsupported/test/Complex.cpp
index 969e3f4f9..9ea91cf42 100644
--- a/unsupported/test/Complex.cpp
+++ b/unsupported/test/Complex.cpp
@@ -40,7 +40,7 @@ template <typename T>
 void take_std( std::complex<T> * dst, int n )
 {
     for (int i=0;i<n;++i)
-        dst[i] = std::complex<T>(i,i);
+        dst[i] = std::complex<T>(static_cast<float>(i),static_cast<float>(i));
     cout << dst[n-1] << endl;
 }
 
diff --git a/unsupported/test/FFT.cpp b/unsupported/test/FFT.cpp
index b029ba655..056be2ef3 100644
--- a/unsupported/test/FFT.cpp
+++ b/unsupported/test/FFT.cpp
@@ -46,10 +46,10 @@ complex<long double>  promote(long double x) { return complex<long double>( x);
         long double difpower=0;
         cerr <<"idx\ttruth\t\tvalue\t|dif|=\n";
         long double pi = acos((long double)-1);
-        for (size_t k0=0;k0<size_t(fftbuf.size());++k0) {
+        for (int k0=0;k0<fftbuf.size();++k0) {
             complex<long double> acc = 0;
             long double phinc = -2.*k0* pi / timebuf.size();
-            for (size_t k1=0;k1<size_t(timebuf.size());++k1) {
+            for (int k1=0;k1<timebuf.size();++k1) {
                 acc +=  promote( timebuf[k1] ) * exp( complex<long double>(0,k1*phinc) );
             }
             totalpower += norm(acc);
@@ -67,8 +67,8 @@ complex<long double>  promote(long double x) { return complex<long double>( x);
     {
         long double totalpower=0;
         long double difpower=0;
-        size_t n = min( buf1.size(),buf2.size() );
-        for (size_t k=0;k<n;++k) {
+        int n = min( buf1.size(),buf2.size() );
+        for (int k=0;k<n;++k) {
             totalpower += (norm( buf1[k] ) + norm(buf2[k]) )/2.;
             difpower += norm(buf1[k] - buf2[k]);
         }