netbsd-help: How do I check for a kernel option?

Subject: How do I check for a kernel option?
To: None <netbsd-help@netbsd.org>
From: Paul Hoffman <phoffman@proper.com>
List: netbsd-help
Date: 03/23/2001 18:57:22

I want to know if the kernel I'm running with was compiled with the 
COMPAT_FREEBSD option. How do I do this check?