(declaration {name}*)
| name | a symbol. | 
proclamation only
Advises the compiler that each name is a valid but potentially non-standard declaration name. The purpose of this is to tell one compiler not to issue warnings for declarations meant for another compiler or other program processor.
 (declaim (declaration author target-language target-machine))
 (declaim (target-language ada))
 (declaim (target-machine IBM-650))
 (defun strangep (x)
   (declare (author "Harry Tweeker"))
   (member x '(strange weird odd peculiar)))