Way to get ALL options for a meta-port?

[Thomas T. Veldhouse]

Is there a way to get ALL of the options available for a meta-port like 
KDE?  Many of the ports it is dependent upon have options to use GIF or 
UNGIF and other things like that.  It would be nice if I could:

# cd /usr/ports/x11/kde3
# make show-options

and see ALL of the options that all of the dependent ports allow?

Thanks in advance,

Tom Veldhouse
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