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diff --git a/eigen/bench/btl/libs/blaze/blaze_interface.hh b/eigen/bench/btl/libs/blaze/blaze_interface.hh
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+//=====================================================
+// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
+//=====================================================
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+//
+#ifndef BLAZE_INTERFACE_HH
+#define BLAZE_INTERFACE_HH
+
+#include <blaze/Math.h>
+#include <blaze/Blaze.h>
+#include <Eigen/Core>
+// using namespace blaze;
+
+#include <vector>
+
+template<class real>
+class blaze_interface {
+
+public :
+
+  typedef real real_type ;
+
+  typedef std::vector<real>        stl_vector;
+  typedef std::vector<stl_vector > stl_matrix;
+
+  typedef blaze::DynamicMatrix<real,blaze::columnMajor>  gene_matrix;
+  typedef blaze::DynamicVector<real>  gene_vector;
+
+  static inline std::string name() { return "blaze"; }
+
+  static void free_matrix(gene_matrix & A, int N){
+    return ;
+  }
+
+  static void free_vector(gene_vector & B){
+    return ;
+  }
+
+  static inline void matrix_from_stl(gene_matrix & A, stl_matrix & A_stl){
+    A.resize(A_stl[0].size(), A_stl.size());
+
+    for (int j=0; j<A_stl.size() ; j++){
+      for (int i=0; i<A_stl[j].size() ; i++){
+        A(i,j) = A_stl[j][i];
+      }
+    }
+  }
+
+  static inline void vector_from_stl(gene_vector & B, stl_vector & B_stl){
+    B.resize(B_stl.size());
+    for (int i=0; i<B_stl.size() ; i++){
+      B[i] = B_stl[i];
+    }
+  }
+
+  static inline void vector_to_stl(gene_vector & B, stl_vector & B_stl){
+    for (int i=0; i<B_stl.size() ; i++){
+      B_stl[i] = B[i];
+    }
+  }
+
+  static inline void matrix_to_stl(gene_matrix & A, stl_matrix & A_stl){
+    int N=A_stl.size();
+    for (int j=0;j<N;j++){
+      A_stl[j].resize(N);
+      for (int i=0;i<N;i++){
+        A_stl[j][i] = A(i,j);
+      }
+    }
+  }
+
+  static EIGEN_DONT_INLINE void matrix_matrix_product(const gene_matrix & A, const gene_matrix & B, gene_matrix & X, int N){
+    X = (A*B);
+  }
+
+  static EIGEN_DONT_INLINE void transposed_matrix_matrix_product(const gene_matrix & A, const gene_matrix & B, gene_matrix & X, int N){
+    X = (trans(A)*trans(B));
+  }
+
+  static EIGEN_DONT_INLINE void ata_product(const gene_matrix & A, gene_matrix & X, int N){
+    X = (trans(A)*A);
+  }
+
+  static EIGEN_DONT_INLINE void aat_product(const gene_matrix & A, gene_matrix & X, int N){
+    X = (A*trans(A));
+  }
+
+  static EIGEN_DONT_INLINE void matrix_vector_product(gene_matrix & A, gene_vector & B, gene_vector & X, int N){
+    X = (A*B);
+  }
+
+  static EIGEN_DONT_INLINE void atv_product(gene_matrix & A, gene_vector & B, gene_vector & X, int N){
+    X = (trans(A)*B);
+  }
+
+  static EIGEN_DONT_INLINE void axpy(const real coef, const gene_vector & X, gene_vector & Y, int N){
+    Y += coef * X;
+  }
+
+  static EIGEN_DONT_INLINE void axpby(real a, const gene_vector & X, real b, gene_vector & Y, int N){
+    Y = a*X + b*Y;
+  }
+
+//   static inline void cholesky(const gene_matrix & X, gene_matrix & C, int N){
+//     C = X;
+//     recursive_cholesky(C);
+//   }
+
+//   static inline void lu_decomp(const gene_matrix & X, gene_matrix & R, int N){
+//     R = X;
+//     std::vector<int> ipvt(N);
+//     lu_factor(R, ipvt);
+//   }
+
+//   static inline void trisolve_lower(const gene_matrix & L, const gene_vector& B, gene_vector & X, int N){
+//     X = lower_trisolve(L, B);
+//   }
+
+  static inline void copy_matrix(const gene_matrix & source, gene_matrix & cible, int N){
+    cible = source;
+  }
+
+  static inline void copy_vector(const gene_vector & source, gene_vector & cible, int N){
+    cible = source;
+  }
+
+};
+
+#endif