the long name of an option used to specify it in a commandline
the short name of an option
flags from #GOptionFlags
the type of the option, as a #GOptionArg
the description for the option in --help output
the placeholder to use for the extra argument parsed by the option in --help output
2.42
Add an option to be handled by @application.
Calling this function is the equivalent of calling g_application_add_main_option_entries() with a single #GOptionEntry that has its arg_data member set to %NULL.
The parsed arguments will be packed into a #GVariantDict which is passed to #GApplication::handle-local-options. If %G_APPLICATION_HANDLES_COMMAND_LINE is set, then it will also be sent to the primary instance. See g_application_add_main_option_entries() for more details.
See #GOptionEntry for more documentation of the arguments.