Jeremy C. Reed wrote:
> Where is USE_FEATURES documented?
> 
> I replied to a PR about including libgetopt buildlink3.mk.
> 
> But when I looked at another example I saw it was done with USE_FEATURES.
> 
> I don't see any reference to libgetopt under mk/features. I didn't check, 
> but I guess it uses nbcompat.
> 
> Where are the instructions?
> 
> The PR is 37253. (Another related is 33012 which I guess can be closed.)

This is my fault.  I didn't document the features framework when it was 
committed.  Roland had documented the available features in the header 
comments for mk/features/features-vars.mk, but I haven't yet provided 
documentation for actual use.  I'll try to get that done soon.

	Cheers,

	-- Johnny C. Lam