Add an option to be handled by this.
Calling this function is the equivalent of calling add_main_option_entries with a single OptionEntry that has its arg_data member set to null.
The parsed arguments will be packed into a VariantDict which is passed to handle_local_options. If g_application_handles_command_line is set, then it will also be sent to the primary instance. See add_main_option_entries for more details.
See OptionEntry for more documentation of the arguments.
| this |
the Application |
| long_name |
the long name of an option used to specify it in a commandline |
| short_name |
the short name of an option |
| flags |
flags from OptionFlags |
| arg |
the type of the option, as a OptionArg |
| description |
the description for the option in `--help` output |
| arg_description |
the placeholder to use for the extra argument parsed by the option in `--help` output |