Index: boost/mpi/packed_iarchive.hpp
===================================================================
--- boost/mpi/packed_iarchive.hpp	(revision 48165)
+++ boost/mpi/packed_iarchive.hpp	(working copy)
@@ -100,7 +100,7 @@
 
   // Load it directly using the primnivites
   template<class T>
-  void load_override(T& x, int version, mpl::true_)
+  void load_override(T& x, int /*version*/, mpl::true_)
   {
     iprimitive::load(x);
   }
Index: boost/mpi/packed_oarchive.hpp
===================================================================
--- boost/mpi/packed_oarchive.hpp	(revision 48165)
+++ boost/mpi/packed_oarchive.hpp	(working copy)
@@ -90,7 +90,7 @@
 
   // Save it directly using the primnivites
   template<class T>
-  void save_override(T const& x, int version, mpl::true_)
+  void save_override(T const& x, int /*version*/, mpl::true_)
   {
     oprimitive::save(x);
   }
Index: boost/mpi/collectives/all_reduce.hpp
===================================================================
--- boost/mpi/collectives/all_reduce.hpp	(revision 48165)
+++ boost/mpi/collectives/all_reduce.hpp	(working copy)
@@ -27,7 +27,7 @@
   template<typename T, typename Op>
   void
   all_reduce_impl(const communicator& comm, const T* in_values, int n,
-                  T* out_values, Op op, mpl::true_ /*is_mpi_op*/,
+                  T* out_values, Op /*op*/, mpl::true_ /*is_mpi_op*/,
                   mpl::true_ /*is_mpi_datatype*/)
   {
     BOOST_MPI_CHECK_RESULT(MPI_Allreduce,