diff --git a/Eigen/src/Cholesky/LLT.h b/Eigen/src/Cholesky/LLT.h
index d552e4e8a..e95b97016 100644
--- a/Eigen/src/Cholesky/LLT.h
+++ b/Eigen/src/Cholesky/LLT.h
@@ -296,8 +296,7 @@ template<typename Derived>
 bool LLT<MatrixType,_UpLo>::solveInPlace(MatrixBase<Derived> &bAndX) const
 {
   ei_assert(m_isInitialized && "LLT is not initialized.");
-  const int size = m_matrix.rows();
-  ei_assert(size==bAndX.rows());
+  ei_assert(m_matrix.rows()==bAndX.rows());
   matrixL().solveInPlace(bAndX);
   matrixU().solveInPlace(bAndX);
   return true;
diff --git a/Eigen/src/Core/DenseBase.h b/Eigen/src/Core/DenseBase.h
index 29a95b8db..199d4aa98 100644
--- a/Eigen/src/Core/DenseBase.h
+++ b/Eigen/src/Core/DenseBase.h
@@ -584,7 +584,7 @@ template<typename Derived> class DenseBase
     #endif
 
     // disable the use of evalTo for dense objects with a nice compilation error
-    template<typename Dest> inline void evalTo(Dest& dst) const
+    template<typename Dest> inline void evalTo(Dest& ) const
     {
       EIGEN_STATIC_ASSERT((ei_is_same_type<Dest,void>::ret),THE_EVAL_EVALTO_FUNCTION_SHOULD_NEVER_BE_CALLED_FOR_DENSE_OBJECTS);
     }
diff --git a/Eigen/src/LU/PartialPivLU.h b/Eigen/src/LU/PartialPivLU.h
index 8ff9c5b03..61d59b8cb 100644
--- a/Eigen/src/LU/PartialPivLU.h
+++ b/Eigen/src/LU/PartialPivLU.h
@@ -439,8 +439,7 @@ struct ei_solve_retval<PartialPivLU<_MatrixType>, Rhs>
     * Step 3: replace c by the solution x to Ux = c.
     */
 
-    const int size = dec().matrixLU().rows();
-    ei_assert(rhs().rows() == size);
+    ei_assert(rhs().rows() == dec().matrixLU().rows());
 
     // Step 1
     dst = dec().permutationP() * rhs();
diff --git a/unsupported/Eigen/FFT b/unsupported/Eigen/FFT
index 83f761028..23e0275b2 100644
--- a/unsupported/Eigen/FFT
+++ b/unsupported/Eigen/FFT
@@ -320,7 +320,7 @@ class FFT
         // if the vector is strided, then we need to copy it to a packed temporary
         Matrix<src_type,1,Dynamic> tmp;
         if ( resize_input ) {
-          size_t ncopy = min(src.size(),src.size() + resize_input);
+          size_t ncopy = std::min(src.size(),src.size() + resize_input);
           tmp.setZero(src.size() + resize_input);
           if ( realfft && HasFlag(HalfSpectrum) ) {
             // pad at the Nyquist bin