Zac Medico wrote:

> Ciaran McCreesh wrote:
>> On Tue, 05 Aug 2008 22:15:11 -0700
>> Zac Medico <zmedico@g.o> wrote:
>>> Does this seem like a desirable way to represent the "virtual"
>>> attribute? Any suggestions?
>> 
>> Again, I'm not so sure that this doesn't represent multiple separable
>> concepts. It seems to imply:
>> 
>> * that the install cost is effectively zero
>> * that the resolution cost is effectively zero
>> * that the package does not install any files
>> * that the package does not use any of the (normal?) ebuild phases, and
>> so does not require exclusive pkg_* execution or pkg_* system state
>> preservation.
>> 
> 
> Can't we just treat them like other ebuilds except for the thing
> about dependencies? Perhaps more fine-grained attributes could be
> added for additional specificity.
> 
Sounds good. Keep existing keyword working how it is, and add new ones
after.

I'd vote for free-{resolve,install} empty and threadable for the other
concepts.