with-compilation-unit

(with-compilation-unit (options...) body...)

Evaluates the body forms in order and returns the last one's value -- a progn around the body. The option list (:override, and any implementation extension) is accepted and ignored.

A progn is the whole implementation, and a legitimate one. The options only control how an enclosing unit's deferred-warning report is merged into this one, and there is no compile-file here to defer a warning from: a rontolisp program is compiled whole in one pass, and a loaded file is spliced into it. Libraries that wrap an operation sequence in one -- ASDF wraps every build -- get the dynamic extent they ask for.