Error codes returned by option parsing.
G_OPTION_ERROR_UNKNOWN_OPTION
An option was not known to the parser.
This error will only be reported, if the parser hasn't been instructed
to ignore unknown options, see g_option_context_set_ignore_unknown_options().
G_OPTION_ERROR_BAD_VALUE
A value couldn't be parsed.
G_OPTION_ERROR_FAILED
A GOptionArgFunc callback failed.
Error codes returned by option parsing. G_OPTION_ERROR_UNKNOWN_OPTION An option was not known to the parser. This error will only be reported, if the parser hasn't been instructed to ignore unknown options, see g_option_context_set_ignore_unknown_options(). G_OPTION_ERROR_BAD_VALUE A value couldn't be parsed. G_OPTION_ERROR_FAILED A GOptionArgFunc callback failed.