Xach was deriding on twitter my inserting a last-minute patch to ASDF for the sake of Genera compatibility. Sure it's a pain to support, but is it *that* much worse than other implementations? grep '#[-+]' asdf.lisp > /tmp/a for i (abcl allegro clisp clozure cmu cormanlisp ecl gcl genera lispworks mcl sbcl scl xcl) { echo "$(grep -c $i < /tmp/a) $i" } | sort -nr 22 scl 21 genera 20 sbcl 20 lispworks 19 abcl 18 cmu 18 clisp 18 allegro 16 gcl 16 ecl 15 xcl 15 cormanlisp 13 clozure 12 mcl All implementations seem to be in the same ballpark, as far as hacks required to support them go. Yes, Genera is old and quirky. I still works better than either GCL (that I've stopped supporting, because I can't compile a version recent enough to not have the multiple-value compile bug), or CormanLisp, for instance. Indeed, supporting 14 implementations is a huge pain. I don't feel like doing it again. And I feel less and less like keeping doing it. —♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org Engineering is not the art of constructing. It is rather the art of not constructing: or, it is the art of doing well with one dollar what any bungler can do with two. — Arthur Mellen Wellington