7.4.2.5 Option Conflict Attributes

These attributes may be used as many times as you need. They are used at the end of the option processing to verify that the context within which each option is found does not conflict with the presence or absence of other options.

This is not a complete cover of all possible conflicts and requirements, but it simple to implement and covers the more common situations.

`flags-must'

one entry for every option that must be present when this option is present

`flags-cant'

one entry for every option that cannot be present when this option is present