this is essentially backporting all the changes made in the Sparse module up to KDE SVN revision r945600, aka changeset:

df9dfa1455


This is what is needed to make Step (in KDE/kdeedu) build.

The rest of Eigen (outside of Sparse) is unaffected except for a few trivial changes that were needed.

calling this 2.0.3, will tag if no problem.

Eigen/src/Core/DiagonalMatrix.h

@@ -62,6 +62,7 @@ class DiagonalMatrix : ei_no_assignment_operator,
   public:
 
     EIGEN_GENERIC_PUBLIC_INTERFACE(DiagonalMatrix)
+    typedef CoeffsVectorType _CoeffsVectorType;
 
     // needed to evaluate a DiagonalMatrix<Xpr> to a DiagonalMatrix<NestByValue<Vector> >
     template<typename OtherCoeffsVectorType>