Lynn Quam quam@ai.sri.com writes:

Is it possible to cause force-output to automatically occur on the repl-buffer. It is annoying that various debugging printout must be explicitly followed by a force-output in order for it to appear in a timely fashion.

Not easily.

You could disable buffering altogether with something like:

(setf (lisp::fd-stream-buffering *standard-output*) :none)

or in your ~/.swank.lisp:

(swank::add-hook swank::*new-connection-hook* (lambda (c) (setf (lisp::fd-stream-buffering (swank::connection.dedicated-output c)) :none)))

If CMUCL were interrupt-safe or if it had preemptive threads you could install a timer which periodically flushes the standard streams. But, ala, it isn't, so the timer variant is rather dangerous.

Helmut.