Any alternative to boost::program_options::split_unix?

[thejohnfreeman]

The parser assumes we have an (argc, argv) tuple to pass. What if we just have a char const* from readline()? Would be helpful to have an alternative to boost::program_options::split_unix that turns the second into the first so that we don't have to depend on two argument parsing libraries. (If it exists, I didn't see it mentioned in the README.)