[phs2501]

CMUCL's interpreter evaluated IR1 (the first intermediate representation of its compiler) IIRC, so it wasn't possible to have a truly compilerless CMUCL _and_ a functional EVAL. I believe this IR1 interpreter was dropped from SBCL very early on. When SBCL gained an interpreter again it was a simple metacircular evaluator a la SICP that was unrelated to anything inherited from CMUCL. (This is all as of 15 or so years ago, I'm sure things have evolved since then!)

[pfdietz]

SBCL has two evaluators now, sb-eval and sb-fasteval. I don't know how much structure they share. By default it builds with sb-eval, but this can be changed with options to make.sh. sb-ext:*evaluator-mode* is still :compile by default.