1 #ifndef BOOST_GRAPH_DETAIL_MPI_INCLUDE_HPP_INCLUDED 2 #define BOOST_GRAPH_DETAIL_MPI_INCLUDE_HPP_INCLUDED 3 4 // Copyright 2018 Peter Dimov 5 // 6 // Use, modification and distribution are subject to the 7 // Boost Software License, Version 1.0 (See accompanying file 8 // LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) 9 10 #if defined BOOST_GRAPH_USE_MPI 11 #define BOOST_GRAPH_MPI_INCLUDE(x) x 12 #else 13 #define BOOST_GRAPH_MPI_INCLUDE(x) <boost/graph/detail/empty_header.hpp> 14 #endif 15 16 #endif // #ifndef BOOST_GRAPH_DETAIL_MPI_INCLUDE_HPP_INCLUDED 17