make.conf question

[Peter Ulrich Kruppa <root at pukruppa.de>]

Hi!

1) Can I put any make option into make.conf that can be applied
   to ports (like in 	make WITH_CALENDAR=yes install clean    )
   or is this restricted to system ressources?
2) If yes - would this be advisable? - Or is there a big chance
   to produce some sort of mess?
3) Is make.conf also applied to gmake (used by many ports)?

Thanks,

Uli.

	+---------------------------+
	|    Peter Ulrich Kruppa    |
        |         Wuppertal         |
        |          Germany          |
        +---------------------------+