the ECHO macro is set to "echo" by default, but it is set to "true" if
make(1) is invoked with the -s option while ECHO_CMD is always set to
the echo command.
Use command macros where appropriate.
KLONE is a small and fast fully interpreted language intended to be
embedded into C applications to provide them with a powerful, yet fast
and small extension language. Its syntax is very inspired from Lisp (its
external syntax has been kept as close as possible to Common Lisp as
possible), but its implementation is original and efficient, to give full
extensibility, intimate interfacing to C, incremental garbage collection,
and full portability on either K&R or ANSI C.
Obtained from: OpenBSD
