diff --git a/Eigen/src/Core/products/TriangularMatrixMatrix_MKL.h b/Eigen/src/Core/products/TriangularMatrixMatrix_MKL.h
index 1322a4d1a..870037ee2 100644
--- a/Eigen/src/Core/products/TriangularMatrixMatrix_MKL.h
+++ b/Eigen/src/Core/products/TriangularMatrixMatrix_MKL.h
@@ -133,7 +133,7 @@ struct product_triangular_matrix_matrix_trmm<EIGTYPE,Index,Mode,true, \
    char side = 'L', transa, uplo, diag = 'N'; \
    EIGTYPE *b; \
    const EIGTYPE *a; \
-   MKL_INT m, n, k, lda, ldb, ldc; \
+   MKL_INT m, n, lda, ldb; \
    MKLTYPE alpha_; \
 \
 /* Set alpha_*/ \
@@ -247,7 +247,7 @@ struct product_triangular_matrix_matrix_trmm<EIGTYPE,Index,Mode,false, \
    char side = 'R', transa, uplo, diag = 'N'; \
    EIGTYPE *b; \
    const EIGTYPE *a; \
-   MKL_INT m, n, k, lda, ldb, ldc; \
+   MKL_INT m, n, lda, ldb, ldc; \
    MKLTYPE alpha_; \
 \
 /* Set alpha_*/ \
diff --git a/Eigen/src/Core/products/TriangularMatrixVector_MKL.h b/Eigen/src/Core/products/TriangularMatrixVector_MKL.h
index eb9e6ff25..2d3732136 100644
--- a/Eigen/src/Core/products/TriangularMatrixVector_MKL.h
+++ b/Eigen/src/Core/products/TriangularMatrixVector_MKL.h
@@ -105,7 +105,7 @@ struct triangular_matrix_vector_product_trmv<Index,Mode,EIGTYPE,ConjLhs,EIGTYPE,
 /* Square part handling */\
 \
    char trans, uplo, diag; \
-   MKL_INT m, n, k, lda, incx, incy; \
+   MKL_INT m, n, lda, incx, incy; \
    EIGTYPE const *a; \
    MKLTYPE alpha_, beta_; \
    assign_scalar_eig2mkl<MKLTYPE, EIGTYPE>(alpha_, alpha); \
@@ -190,7 +190,7 @@ struct triangular_matrix_vector_product_trmv<Index,Mode,EIGTYPE,ConjLhs,EIGTYPE,
 /* Square part handling */\
 \
    char trans, uplo, diag; \
-   MKL_INT m, n, k, lda, incx, incy; \
+   MKL_INT m, n, lda, incx, incy; \
    EIGTYPE const *a; \
    MKLTYPE alpha_, beta_; \
    assign_scalar_eig2mkl<MKLTYPE, EIGTYPE>(alpha_, alpha); \
diff --git a/Eigen/src/Core/products/TriangularSolverMatrix_MKL.h b/Eigen/src/Core/products/TriangularSolverMatrix_MKL.h
index 3ba20cdda..47699f210 100644
--- a/Eigen/src/Core/products/TriangularSolverMatrix_MKL.h
+++ b/Eigen/src/Core/products/TriangularSolverMatrix_MKL.h
@@ -33,6 +33,8 @@
 #ifndef EIGEN_TRIANGULAR_SOLVER_MATRIX_MKL_H
 #define EIGEN_TRIANGULAR_SOLVER_MATRIX_MKL_H
 
+namespace Eigen {
+
 namespace internal {
 
 // implements LeftSide op(triangular)^-1 * general
@@ -148,4 +150,6 @@ EIGEN_MKL_TRSM_R(scomplex, MKL_Complex8, c)
 
 } // end namespace internal
 
+} // end namespace Eigen
+
 #endif // EIGEN_TRIANGULAR_SOLVER_MATRIX_MKL_H
diff --git a/Eigen/src/Eigenvalues/SelfAdjointEigenSolver_MKL.h b/Eigen/src/Eigenvalues/SelfAdjointEigenSolver_MKL.h
index 4877716c7..5ebcd08e1 100644
--- a/Eigen/src/Eigenvalues/SelfAdjointEigenSolver_MKL.h
+++ b/Eigen/src/Eigenvalues/SelfAdjointEigenSolver_MKL.h
@@ -66,7 +66,7 @@ SelfAdjointEigenSolver<Matrix<EIGTYPE, Dynamic, Dynamic, EIGCOLROW> >::compute(c
 \
   lda = matrix.outerStride(); \
   matrix_order=MKLCOLROW; \
-  char jobz, uplo='L', range='A'; \
+  char jobz, uplo='L'/*, range='A'*/; \
   jobz = computeEigenvectors ? 'V' : 'N'; \
 \
   info = LAPACKE_##MKLNAME( matrix_order, jobz, uplo, n, (MKLTYPE*)m_eivec.data(), lda, (MKLRTYPE*)m_eivalues.data() ); \
diff --git a/Eigen/src/QR/ColPivHouseholderQR_MKL.h b/Eigen/src/QR/ColPivHouseholderQR_MKL.h
index 645f309eb..0ad66d3f8 100644
--- a/Eigen/src/QR/ColPivHouseholderQR_MKL.h
+++ b/Eigen/src/QR/ColPivHouseholderQR_MKL.h
@@ -58,7 +58,7 @@ ColPivHouseholderQR<Matrix<EIGTYPE, Dynamic, Dynamic, EIGCOLROW, Dynamic, Dynami
   m_hCoeffs.resize(size);\
 \
   m_colsTranspositions.resize(cols);\
-  Index number_of_transpositions = 0;\
+  /*Index number_of_transpositions = 0;*/ \
 \
   m_nonzero_pivots = 0; \
   m_maxpivot = RealScalar(0);\
diff --git a/Eigen/src/SVD/JacobiSVD_MKL.h b/Eigen/src/SVD/JacobiSVD_MKL.h
index 0afab4dc9..1eeafca49 100644
--- a/Eigen/src/SVD/JacobiSVD_MKL.h
+++ b/Eigen/src/SVD/JacobiSVD_MKL.h
@@ -49,7 +49,7 @@ JacobiSVD<Matrix<EIGTYPE, Dynamic, Dynamic, EIGCOLROW, Dynamic, Dynamic>, ColPiv
   typedef MatrixType::RealScalar RealScalar; \
   allocate(matrix.rows(), matrix.cols(), computationOptions); \
 \
-  const RealScalar precision = RealScalar(2) * NumTraits<Scalar>::epsilon(); \
+  /*const RealScalar precision = RealScalar(2) * NumTraits<Scalar>::epsilon();*/ \
   m_nonzeroSingularValues = m_diagSize; \
 \
   lapack_int lda = matrix.outerStride(), ldu, ldvt; \
diff --git a/unsupported/Eigen/SparseExtra b/unsupported/Eigen/SparseExtra
index 2cc14bbe1..340c34736 100644
--- a/unsupported/Eigen/SparseExtra
+++ b/unsupported/Eigen/SparseExtra
@@ -39,9 +39,7 @@
 
 #if !defined(_WIN32)
 #include <dirent.h>
-namespace Eigen {
 #include "src/SparseExtra/MatrixMarketIterator.h"
-}
 #endif
 
 #include "../../Eigen/src/Core/util/ReenableStupidWarnings.h"
diff --git a/unsupported/Eigen/src/SparseExtra/MarketIO.h b/unsupported/Eigen/src/SparseExtra/MarketIO.h
index d034d8e2f..ef5dcf9f0 100644
--- a/unsupported/Eigen/src/SparseExtra/MarketIO.h
+++ b/unsupported/Eigen/src/SparseExtra/MarketIO.h
@@ -26,6 +26,8 @@
 #ifndef EIGEN_SPARSE_MARKET_IO_H
 #define EIGEN_SPARSE_MARKET_IO_H
 
+#include <iostream>
+
 namespace Eigen { 
 
 namespace internal 
@@ -117,7 +119,7 @@ namespace internal
     out << value.real << " " << value.imag()<< "\n"; 
   }
 
-}
+} // end namepsace internal
 
 inline bool getMarketHeader(const std::string& filename, int& sym, bool& iscomplex, bool& isvector)
 {
diff --git a/unsupported/Eigen/src/SparseExtra/MatrixMarketIterator.h b/unsupported/Eigen/src/SparseExtra/MatrixMarketIterator.h
index 322780ef9..5a50bc5bc 100644
--- a/unsupported/Eigen/src/SparseExtra/MatrixMarketIterator.h
+++ b/unsupported/Eigen/src/SparseExtra/MatrixMarketIterator.h
@@ -2,7 +2,7 @@
 // This file is part of Eigen, a lightweight C++ template library
 // for linear algebra.
 //
-// Copyright (C) 2012
+// Copyright (C) 2012 Desire NUENTSA WAKAM <desire.nuentsa_wakam@inria.fr>
 //
 // Eigen is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Lesser General Public
@@ -22,9 +22,12 @@
 // You should have received a copy of the GNU Lesser General Public
 // License and a copy of the GNU General Public License along with
 // Eigen. If not, see <http://www.gnu.org/licenses/>.
+
 #ifndef EIGEN_BROWSE_MATRICES_H
 #define EIGEN_BROWSE_MATRICES_H
 
+namespace Eigen {
+
 enum {
   SPD = 0x100,
   NonSymmetric = 0x0
@@ -227,4 +230,6 @@ class MatrixMarketIterator
     
 };
 
+} // end namespace Eigen
+
 #endif