Broke /lib64, salvageable? (ubuntu/mint12)

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http://serverfault.com – In a misguided attempt to recompile ld with debug symbols, I ended up with a /lib64 that was not symlinked to /lib (Debian 64-bit libs are in in /lib/x84_64-linux-gnu). I attempted to reinstall libc6 using apt, which errored out complaining about the above. I (mistakenly) figured I could just mv /lib64 /tmp && ln -s /lib /lib64; the first command worked, leaving a broken system (/bin/ld not found etc.). Is there any way to fix this in-place? (i.e. without running a rescue disk) If I could have posted this anonymously, I would have ... [sigh] (HowTos)