ecl-config(1) on Linux
The text 5cf57a5ac02a, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
Embeddable Common LISP configuration query
Flags it lists
-
-cflags -
-ldflags -
-libs