Boost Jam question: how to set "features"?

From: Steve Anichini (sanichin_at_[hidden])
Date: 2001-11-09 00:03:14

in tools/build/features.jam I see this line:
feature runtime-link : dynamic static ;

my question is: how the heck do I over-ride this from the command line? I.e.
by default on MSVC it builds runtime-link-dynamic. I want to build
runtime-link-static.

I've read every document on Jam and FTJam I can find on the web, I can't
find the way to do this.

-steve