how do I use the make universe machines?

[Benjamin Kaduk]

On Wed, Jun 06, 2018 at 12:47:17AM +0000, Rick Macklem wrote:
> I've heard mention of "make universe" machines multiple times,
> but have no idea how to use them?
> Is there doc on this?
> 
> Thanks, rick
> ps: I'll admit I haven't looked at the developer's guide in a long time.

I think https://www.freebsd.org/internal/machines.html sounds like
the page you're looking for.  (universe is just a top-level make
target like buildworld, but will take a while on non-beefy
hardware.)

-Ben