import-os-error-syscall ?

["Brian D. Carlstrom" <bdc@zurich.ai.mit.edu>]

SCSH uses CIG (C Interface Genator). At compile time, cig processes a
file like network.scm, parsing out define-foreign expressions, generates
network.c which calls into user provided network1.c. At runtime, the
define-foreign macro expands into calls to get-external anda
external-call.

-bri