[gentoo-alt] Emerging glibc in a prefix gentoo: Meaningful? Doable?

After successfully bootstrapping on some Linux platform one is still using
the glibc of the platform I suppose.

If it were possible to do a successful

    emerge glibc

would that mean that the prefix gentoo then starts to use the newly
emerged glibc? (Maybe I would also have to do a `emerge -e world'
afterwards?)

Would it be a good thing to do? Would it reduce the risk for future
failures because of peculiarities of the platform glibc?

Then, about the "doable" question: Is it supposed to be possible to emerge
glibc? I gave it a shot on my Fedora Core 6 prefix setup, and it failed at
an early stage. I can write a bug report if this should be considered a
bug.

--Rabbe

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