On 04-04-2009 13:23:24 +0300, Petteri Räty wrote:
> > 
> > However, we have toyed with other ideas. One of which is to introduce
> > IUSE=prefix in prefix.eclass similar to the USE=multilib approach. I
> > don't really like this idea because it exposes the use flag and we
> > don't want it exposed to the users.
> > 
> 
> If you don't want it exposed to users, then use a USE_EXPAND variable.
> Like zmedico said in EAPI 3 a normal use flag could be hidden but
> probably better to not have to migrate everything with prefix support to
> EAPI 3. Out of the existing USE_EXPAND variables USERLAND makes most
> sense to me but we could also introduce a new one too.

USE_EXPAND does something like:
USERLAND="GNU" -> userland_GNU

For Prefix, we just need the "prefix" USE-flag (not prefix_XXX), hence
USE_EXPAND doesn't help us.  Adding "prefix" to use.mask (and use.force
in Prefix profiles) allows us to get the desired behaviour.



-- 
Fabian Groffen
Gentoo on a different level