Currently stable version of dev-lisp/sbcl does not builds with glibc 2.8 (bug 227685) and the latter is going to be stabilized soon. We need newer version of sbcl stable. Maintainers, please, add archs to this bug. Thank you in advance.
hmm, bummer. I just hit this myself.
Instead of adding amd64, please mark it stable there on my authority (amd64 team hat on).
1.0.19 looks ready to go stable from lisp team view.
Sparc stable (built with sys-libs/glibc-2.8_p20080602-r1).
x86 stable, closing