diff --git a/Eigen/Core b/Eigen/Core
index 9f1c63826..d18835613 100644
--- a/Eigen/Core
+++ b/Eigen/Core
@@ -432,6 +432,7 @@ using std::ptrdiff_t;
 
 #include "src/Core/util/IndexedViewHelper.h"
 #include "src/Core/ArithmeticSequence.h"
+#include "src/Core/IO.h"
 #include "src/Core/DenseCoeffsBase.h"
 #include "src/Core/DenseBase.h"
 #include "src/Core/MatrixBase.h"
@@ -480,7 +481,6 @@ using std::ptrdiff_t;
 #include "src/Core/Redux.h"
 #include "src/Core/Visitor.h"
 #include "src/Core/Fuzzy.h"
-#include "src/Core/IO.h"
 #include "src/Core/Swap.h"
 #include "src/Core/CommaInitializer.h"
 #include "src/Core/GeneralProduct.h"
diff --git a/Eigen/Sparse b/Eigen/Sparse
index a2ef7a665..136e681a1 100644
--- a/Eigen/Sparse
+++ b/Eigen/Sparse
@@ -25,7 +25,9 @@
 
 #include "SparseCore"
 #include "OrderingMethods"
+#ifndef EIGEN_MPL2_ONLY
 #include "SparseCholesky"
+#endif
 #include "SparseLU"
 #include "SparseQR"
 #include "IterativeLinearSolvers"
diff --git a/Eigen/src/Core/ArithmeticSequence.h b/Eigen/src/Core/ArithmeticSequence.h
index 99b954432..ada1571f1 100644
--- a/Eigen/src/Core/ArithmeticSequence.h
+++ b/Eigen/src/Core/ArithmeticSequence.h
@@ -14,7 +14,7 @@ namespace Eigen {
 
 namespace internal {
 
-#if !EIGEN_HAS_CXX11
+#if (!EIGEN_HAS_CXX11) || !((!EIGEN_COMP_GNUC) || EIGEN_COMP_GNUC>=48)
 template<typename T> struct aseq_negate {};
 
 template<> struct aseq_negate<Index> {
@@ -138,7 +138,7 @@ protected:
 
 public:
 
-#if EIGEN_HAS_CXX11
+#if EIGEN_HAS_CXX11 && ((!EIGEN_COMP_GNUC) || EIGEN_COMP_GNUC>=48)
   auto reverse() const -> decltype(Eigen::seqN(m_first+(m_size+fix<-1>())*m_incr,m_size,-m_incr)) {
     return seqN(m_first+(m_size+fix<-1>())*m_incr,m_size,-m_incr);
   }
diff --git a/Eigen/src/Core/DenseBase.h b/Eigen/src/Core/DenseBase.h
index a8229cf03..fc807577b 100644
--- a/Eigen/src/Core/DenseBase.h
+++ b/Eigen/src/Core/DenseBase.h
@@ -463,7 +463,17 @@ template<typename Derived> class DenseBase
     EIGEN_DEVICE_FUNC
     void visit(Visitor& func) const;
 
-    inline const WithFormat<Derived> format(const IOFormat& fmt) const;
+    /** \returns a WithFormat proxy object allowing to print a matrix the with given
+      * format \a fmt.
+      *
+      * See class IOFormat for some examples.
+      *
+      * \sa class IOFormat, class WithFormat
+      */
+    inline const WithFormat<Derived> format(const IOFormat& fmt) const
+    {
+      return WithFormat<Derived>(derived(), fmt);
+    }
 
     /** \returns the unique coefficient of a 1x1 expression */
     EIGEN_DEVICE_FUNC
diff --git a/Eigen/src/Core/IO.h b/Eigen/src/Core/IO.h
index 644228c3f..da7fd6cce 100644
--- a/Eigen/src/Core/IO.h
+++ b/Eigen/src/Core/IO.h
@@ -109,20 +109,6 @@ class WithFormat
     IOFormat m_format;
 };
 
-/** \returns a WithFormat proxy object allowing to print a matrix the with given
-  * format \a fmt.
-  *
-  * See class IOFormat for some examples.
-  *
-  * \sa class IOFormat, class WithFormat
-  */
-template<typename Derived>
-inline const WithFormat<Derived>
-DenseBase<Derived>::format(const IOFormat& fmt) const
-{
-  return WithFormat<Derived>(derived(), fmt);
-}
-
 namespace internal {
 
 // NOTE: This helper is kept for backward compatibility with previous code specializing
diff --git a/Eigen/src/Core/IndexedView.h b/Eigen/src/Core/IndexedView.h
index 63878428e..8c57a277c 100644
--- a/Eigen/src/Core/IndexedView.h
+++ b/Eigen/src/Core/IndexedView.h
@@ -19,8 +19,8 @@ struct traits<IndexedView<XprType, RowIndices, ColIndices> >
  : traits<XprType>
 {
   enum {
-    RowsAtCompileTime = array_size<RowIndices>::value,
-    ColsAtCompileTime = array_size<ColIndices>::value,
+    RowsAtCompileTime = int(array_size<RowIndices>::value),
+    ColsAtCompileTime = int(array_size<ColIndices>::value),
     MaxRowsAtCompileTime = RowsAtCompileTime != Dynamic ? int(RowsAtCompileTime) : int(traits<XprType>::MaxRowsAtCompileTime),
     MaxColsAtCompileTime = ColsAtCompileTime != Dynamic ? int(ColsAtCompileTime) : int(traits<XprType>::MaxColsAtCompileTime),
 
@@ -29,8 +29,8 @@ struct traits<IndexedView<XprType, RowIndices, ColIndices> >
                : (MaxColsAtCompileTime==1&&MaxRowsAtCompileTime!=1) ? 0
                : XprTypeIsRowMajor,
 
-    RowIncr = get_compile_time_incr<RowIndices>::value,
-    ColIncr = get_compile_time_incr<ColIndices>::value,
+    RowIncr = int(get_compile_time_incr<RowIndices>::value),
+    ColIncr = int(get_compile_time_incr<ColIndices>::value),
     InnerIncr = IsRowMajor ? ColIncr : RowIncr,
     OuterIncr = IsRowMajor ? RowIncr : ColIncr,
 
@@ -51,7 +51,7 @@ struct traits<IndexedView<XprType, RowIndices, ColIndices> >
 
     // FIXME we deal with compile-time strides if and only if we have DirectAccessBit flag,
     // but this is too strict regarding negative strides...
-    DirectAccessMask = (InnerIncr!=UndefinedIncr && OuterIncr!=UndefinedIncr && InnerIncr>=0 && OuterIncr>=0) ? DirectAccessBit : 0,
+    DirectAccessMask = (int(InnerIncr)!=UndefinedIncr && int(OuterIncr)!=UndefinedIncr && InnerIncr>=0 && OuterIncr>=0) ? DirectAccessBit : 0,
     FlagsRowMajorBit = IsRowMajor ? RowMajorBit : 0,
     FlagsLvalueBit = is_lvalue<XprType>::value ? LvalueBit : 0,
     Flags = (traits<XprType>::Flags & (HereditaryBits | DirectAccessMask)) | FlagsLvalueBit | FlagsRowMajorBit
diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index 0e2863306..12531e342 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -349,10 +349,12 @@
 # define __has_feature(x) 0
 #endif
 
+// Some old compilers do not support template specializations like:
+// template<typename T,int N> void foo(const T x[N]);
 #if !( EIGEN_COMP_CLANG && ((EIGEN_COMP_CLANG<309) || defined(__apple_build_version__)) || EIGEN_COMP_GNUC_STRICT && EIGEN_COMP_GNUC<49)
-#define EIGEN_HAS_INDEXED_VIEW 1
+#define EIGEN_HAS_STATIC_ARRAY_TEMPLATE 1
 #else
-#define EIGEN_HAS_INDEXED_VIEW 0
+#define EIGEN_HAS_STATIC_ARRAY_TEMPLATE 0
 #endif
 
 // Upperbound on the C++ version to use.
diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h
index ee0531b32..90eda6e70 100755
--- a/Eigen/src/Core/util/Meta.h
+++ b/Eigen/src/Core/util/Meta.h
@@ -97,17 +97,22 @@ template<> struct is_arithmetic<unsigned int>  { enum { value = true }; };
 template<> struct is_arithmetic<signed long>   { enum { value = true }; };
 template<> struct is_arithmetic<unsigned long> { enum { value = true }; };
 
-template<typename T> struct is_integral        { enum { value = false }; };
-template<> struct is_integral<bool>            { enum { value = true }; };
-template<> struct is_integral<char>            { enum { value = true }; };
-template<> struct is_integral<signed char>     { enum { value = true }; };
-template<> struct is_integral<unsigned char>   { enum { value = true }; };
-template<> struct is_integral<signed short>    { enum { value = true }; };
-template<> struct is_integral<unsigned short>  { enum { value = true }; };
-template<> struct is_integral<signed int>      { enum { value = true }; };
-template<> struct is_integral<unsigned int>    { enum { value = true }; };
-template<> struct is_integral<signed long>     { enum { value = true }; };
-template<> struct is_integral<unsigned long>   { enum { value = true }; };
+#if EIGEN_HAS_CXX11
+using std::is_integral;
+#else
+template<typename T> struct is_integral               { enum { value = false }; };
+template<> struct is_integral<bool>                   { enum { value = true }; };
+template<> struct is_integral<char>                   { enum { value = true }; };
+template<> struct is_integral<signed char>            { enum { value = true }; };
+template<> struct is_integral<unsigned char>          { enum { value = true }; };
+template<> struct is_integral<signed short>           { enum { value = true }; };
+template<> struct is_integral<unsigned short>         { enum { value = true }; };
+template<> struct is_integral<signed int>             { enum { value = true }; };
+template<> struct is_integral<unsigned int>           { enum { value = true }; };
+template<> struct is_integral<signed long>            { enum { value = true }; };
+template<> struct is_integral<unsigned long>          { enum { value = true }; };
+#endif
+
 
 template <typename T> struct add_const { typedef const T type; };
 template <typename T> struct add_const<T&> { typedef T& type; };
diff --git a/Eigen/src/plugins/IndexedViewMethods.h b/Eigen/src/plugins/IndexedViewMethods.h
index 81e463623..22c1666c5 100644
--- a/Eigen/src/plugins/IndexedViewMethods.h
+++ b/Eigen/src/plugins/IndexedViewMethods.h
@@ -7,7 +7,6 @@
 // Public License v. 2.0. If a copy of the MPL was not distributed
 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-#if EIGEN_HAS_INDEXED_VIEW
 #if !defined(EIGEN_PARSED_BY_DOXYGEN)
 
 // This file is automatically included twice to generate const and non-const versions
@@ -113,6 +112,8 @@ operator()(const RowIndices& rowIndices, const ColIndices& colIndices) EIGEN_IND
   return Base::operator()(internal::eval_expr_given_size(rowIndices,rows()),internal::eval_expr_given_size(colIndices,cols()));
 }
 
+#if EIGEN_HAS_STATIC_ARRAY_TEMPLATE
+
 // The folowing three overloads are needed to handle raw Index[N] arrays.
 
 template<typename RowIndicesT, std::size_t RowIndicesN, typename ColIndices>
@@ -139,6 +140,8 @@ operator()(const RowIndicesT (&rowIndices)[RowIndicesN], const ColIndicesT (&col
                     (derived(), rowIndices, colIndices);
 }
 
+#endif // EIGEN_HAS_STATIC_ARRAY_TEMPLATE
+
 // Overloads for 1D vectors/arrays
 
 template<typename Indices>
@@ -182,6 +185,8 @@ operator()(const IndexType& id) EIGEN_INDEXED_VIEW_METHOD_CONST
   return Base::operator()(internal::eval_expr_given_size(id,size()));
 }
 
+#if EIGEN_HAS_STATIC_ARRAY_TEMPLATE
+
 template<typename IndicesT, std::size_t IndicesN>
 typename internal::enable_if<IsRowMajor,
   IndexedView<EIGEN_INDEXED_VIEW_METHOD_CONST Derived,IvcIndex,const IndicesT (&)[IndicesN]> >::type
@@ -202,6 +207,8 @@ operator()(const IndicesT (&indices)[IndicesN]) EIGEN_INDEXED_VIEW_METHOD_CONST
             (derived(), indices, IvcIndex(0));
 }
 
+#endif // EIGEN_HAS_STATIC_ARRAY_TEMPLATE
+
 #undef EIGEN_INDEXED_VIEW_METHOD_CONST
 #undef EIGEN_INDEXED_VIEW_METHOD_TYPE
 
@@ -258,4 +265,3 @@ IndexedView_or_VectorBlock
 operator()(const Indices& indices);
 
 #endif  // EIGEN_PARSED_BY_DOXYGEN
-#endif  // EIGEN_HAS_INDEXED_VIEW
diff --git a/test/basicstuff.cpp b/test/basicstuff.cpp
index 99d91f9da..c346ce6cb 100644
--- a/test/basicstuff.cpp
+++ b/test/basicstuff.cpp
@@ -49,6 +49,22 @@ template<typename MatrixType> void basicStuff(const MatrixType& m)
   v1[r] = x;
   VERIFY_IS_APPROX(x, v1[r]);
 
+  // test fetching with various index types.
+  Index r1 = internal::random<Index>(0, numext::mini(Index(127),rows-1));
+  x = v1(static_cast<char>(r1));
+  x = v1(static_cast<signed char>(r1));
+  x = v1(static_cast<unsigned char>(r1));
+  x = v1(static_cast<signed short>(r1));
+  x = v1(static_cast<unsigned short>(r1));
+  x = v1(static_cast<signed int>(r1));
+  x = v1(static_cast<unsigned int>(r1));
+  x = v1(static_cast<signed long>(r1));
+  x = v1(static_cast<unsigned long>(r1));
+#if EIGEN_HAS_CXX11
+  x = v1(static_cast<long long int>(r1));
+  x = v1(static_cast<unsigned long long int>(r1));
+#endif
+
   VERIFY_IS_APPROX(               v1,    v1);
   VERIFY_IS_NOT_APPROX(           v1,    2*v1);
   VERIFY_IS_MUCH_SMALLER_THAN(    vzero, v1);
diff --git a/test/indexed_view.cpp b/test/indexed_view.cpp
index 4cbc00639..7245cf378 100644
--- a/test/indexed_view.cpp
+++ b/test/indexed_view.cpp
@@ -79,7 +79,6 @@ is_same_seq_type(const T1& a, const T2& b)
 
 void check_indexed_view()
 {
-#if EIGEN_HAS_INDEXED_VIEW
   using Eigen::placeholders::all;
   using Eigen::placeholders::last;
   using Eigen::placeholders::end;
@@ -298,6 +297,7 @@ void check_indexed_view()
 
   VERIFY_IS_APPROX( (A(std::array<int,3>{{1,3,5}}, std::array<int,4>{{9,6,3,0}})), A(seqN(1,3,2), seqN(9,4,-3)) );
 
+#if EIGEN_HAS_STATIC_ARRAY_TEMPLATE
   VERIFY_IS_APPROX( A({3, 1, 6, 5}, all), A(std::array<int,4>{{3, 1, 6, 5}}, all) );
   VERIFY_IS_APPROX( A(all,{3, 1, 6, 5}), A(all,std::array<int,4>{{3, 1, 6, 5}}) );
   VERIFY_IS_APPROX( A({1,3,5},{3, 1, 6, 5}), A(std::array<int,3>{{1,3,5}},std::array<int,4>{{3, 1, 6, 5}}) );
@@ -310,6 +310,7 @@ void check_indexed_view()
 
   VERIFY_IS_APPROX( b({3, 1, 6, 5}), b(std::array<int,4>{{3, 1, 6, 5}}) );
   VERIFY_IS_EQUAL( b({1,3,5}).SizeAtCompileTime, 3 );
+#endif
 
 #endif
 
@@ -365,7 +366,6 @@ void check_indexed_view()
     VERIFY( is_same_eq( cA.middleRows<3>(1), cA.middleRows(1,fix<3>)) );
   }
 
-#endif  // EIGEN_HAS_INDEXED_VIEW
 }
 
 void test_indexed_view()
diff --git a/test/mpl2only.cpp b/test/mpl2only.cpp
index 5ef0d2b2e..7d04d6bba 100644
--- a/test/mpl2only.cpp
+++ b/test/mpl2only.cpp
@@ -12,7 +12,9 @@
 #include <Eigen/SparseCore>
 #include <Eigen/SparseLU>
 #include <Eigen/SparseQR>
+#include <Eigen/Sparse>
 #include <Eigen/IterativeLinearSolvers>
+#include <Eigen/Eigen>
 
 int main()
 {