*handle-warn-on-redefinition*
specifies what action should be taken on defining external symbols in the packages specified in the variable
*packages-for-warn-on-definition*
. If
*handle-warn-on-redefinition*
is set to
:warn
then you are warned. If it is set to
:quiet
or
nil
, the definition is done quietly. If, however, it is set to
:error
, then LispWorks signals an error.