BOOST_MPI_HOMOGENEOUS — Comment this macro is you are running in an heterogeneous environement.
// In header: <boost/mpi/config.hpp> BOOST_MPI_HOMOGENEOUS
When this flags is enabled, we assume some simple, POD like, type can be transmited without paying the cost of portable serialization.
Comment this if your platform is not homogeneous and that portable serialization/deserialization must be performed.
It you do so, check that you MPI implementation supports thats kind of environement.