




 
An output stream for message reporting. If set to 
nil
, then no output will be produced. By default this is 
t
.
The 
break-on-unresolved-functions
 function produces break-on-entry code for all currently undefined but referenced (that is, unresolved) foreign symbols, so that if an undefined foreign function is called from within the foreign code, a Lisp error will occur. Break-on-entry code will also be produced for any new unresolved symbols loaded later in your Lisp session.
The special variable 
foreign:*break-on-unresolved-functions*
 will, when set to non-
nil
, produce break-on-entry code for all new unresolved symbols that are loaded, but won't do so for symbols already loaded. By default this variable is set to 
nil
.