In most cases foreign callable names are passed to
in the value of the
keyword argument, and each of these foreign callables will be retained automatically in the delivered image.
However other foreign callables defined with a string
are liable to be shaken from the delivered image. The best approach is to use a symbol to name such foreign callables, as described under
LispWorks Foreign Language Interface User Guide and Reference Manual
LispWorks Delivery User Guide - 13 Dec 2011