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Source for wiki CondExpand version 1
Supporting `cond-expand` from SRFI-0 and R7RS at the REPL?
Supported: Gauche, MIT, Chicken, Bigloo, Kawa, SISC, STklos, !SigScheme, Scheme 9, RScheme, S7, SXM, Foment, Chibi
Not supported: Racket* , Scheme48/scsh, SCM, Chez, Vicare*, Larceny*, Ypsilon*, Mosh, !IronScheme, NexJ, JScheme, KSi, Shoe, !TinyScheme, BDC, XLisp, Rep, Schemik, Elk, Llava, Sizzle, !FemtoLisp, Dfsch, Inlab, Owl Lisp
*Said to support SRFI 0 through [https://code.launchpad.net/~scheme-libraries-team/scheme-libraries/srfi a third-party library]; not tested
Note: Although [http://srfi.schemers.org/srfi-0/srfi-0.html SRFI 0] says that `cond-expand` can only be portably used at the top level, all the above Schemes support nested `cond-expand`. R7RS allows `cond-expand` anywhere a syntactic expression is permitted (it's also a library declaration).