Which release supported installation destinations?

[George Plymale II]

Mojca Miklavec <mojca at macports.org> writes:

> It's worth noting though that HB tries very hard to make the
> majority(?) of packages relocatable. Lots of libraries would only need
> a couple of install_name_tool calls. It's something that would be nice
> in MacPorts as well if anyone with sufficient knowledge was willing to
> work on that .

Would this be done at the Portfile level or would it involve code in
the MacPorts base?