[Boost-users] boost program_options

There seems to be change/regression in boost program options. In boost/1.53. I used boost::program_options::variables_map vm; po::store( po::parse_command_line( argc, argv, desc_ , po::command_line_style::unix_style ^ po::command_line_style::allow_short), vm ); po::notify( vm ); This could handle arguments like: ./exe --help all ./exe --help summary However from boost 1.59, this no longer works, instead I have to use: ./exe --help=all ./exe --help=summary Is this a known change ? how do i get back to the old functionality ? Ta, Avi