How do I tell macports that a step is finished?

[Michael_google gmail_Gersten]

>>> It's already done the dependencies, the fetch, the configuration
>>> (which failed before, and now is manually done, as well as the i386
>>> half of the compile.)
>>>
>>> How do I say "Step X is done, go to the next step"?
>>
>> That information is recorded in the state file, which is stored in the
>> file named .macports.${name}.state in the port's work directory. It includes
>> a line for every completed phase.
>
>
> ... but manually editing it is almost never what you actually want to do
> (hint - whatever you did to 'manually' run configure could be added to the
> portfile so that when port runs configure it works).

Ok, how do I modify the portfile? What do I need to do to add
CFLAGS='-arch xxxx' CXXFLAGS='-arch xxxx'