64-bit versions of some ports

[Anders F Björklund]

> And like you mention, doing multilib on other platforms needs "lib64".
> (at least I think it would, as I am not running any 64-bit just yet)

On second thought, we don't need any /opt/local/lib/{lib32,lib64}
or multilib on other platforms - just one native "lib" directory.
Just because the system has /usr/lib/lib32 and /usr/lib/lib64
for compatibility, doesn't mean one has to compile using it...

Then again, I said the same thing about Universal Binaries too.
So maybe MP does "need" multilib, like it "needed" +universal ?
But compiling 64-bit binaries on a 64-bit system, _that_ is at
least a often required feature and thus it should be supported.

--anders

PS. http://www.redhat.com/magazine/009jul05/features/multilib/
     (on Darwin this is all handled by using the fat binaries)