Gentoo's Bugzilla –
Attachment 581888 Details for
Bug 689244media-sound/supercollider[server] with dev-libs/boost-1.70.0: error: 'boost::asio::ip::tcp::acceptor' {aka 'class boost::asio ::basic_socket_acceptor<boost::asio::ip::tcp>'} has no member named 'get_io_service'