Forcing options in required ports

Hi,

I need to add a BUILD_DEPENDS to a port (p5-FusionInventory-Agent, 
actually) with specifics options required by the port which requires it

This lead to 12 questions :

1- Is there a way to specify options port in the Makefile ?
2- As a consequence, the port cannot be fetched from packages, it *must* 
be built from ports. How to force this ?

Thanks

Xavier

-- 
Xavier HUMBERT - Unix/Win/MacOSX Sysadmin/Network Senior Engineer
https://www.amdh.fr