Companion

For options of the %G_OPTION_ARG_CALLBACK kind, this flag indicates that the argument should be passed to the callback in the GLib filename encoding rather than UTF-8. Since 2.8

The option doesn't appear in --help output.

The option appears in the main section of the --help output, even if it is defined in a group.

For options of the %G_OPTION_ARG_CALLBACK kind, this flag indicates that the callback does not take any argument (like a %G_OPTION_ARG_NONE option). Since 2.8

This flag turns off the automatic conflict resolution which prefixes long option names with groupname- if there is a conflict. This option should only be used in situations where aliasing is necessary to model some legacy commandline interface. It is not safe to use this option, unless all option groups are under your direct control. Since 2.8.

No flags. Since: 2.42.

For options of the %G_OPTION_ARG_CALLBACK kind, this flag indicates that the argument supply is optional. If no argument is given then data of %GOptionParseFunc will be set to NULL. Since 2.8

For options of the %G_OPTION_ARG_NONE kind, this flag indicates that the sense of the option is reversed. i.e. false will be stored into the argument rather than true.