Disable compiler warnings for special variables

If I create functions using a undeclared special variable like this

(defun some-special-function ()
  (do-something-with *special-variable*))

,
the compiler warns me, every time.

The special variables are only defined temporary:

(let ((*special-variable* nil))
  (declare (special *special-variable*))
  (some-special-function))

if I used defparameter (/etc.) i could forget to reinitialize the special variables or call the function in the wrong context.

How can I turn off the compiler warnings (in SBCL)?
It would be best to only turn off the warnings for these vars.

Did you search for "disable compiler warnings sbcl" ?:

• sbcl manual
  stackoverflow
  stackoverflow
  h4ck3r

I found all this in under 10 minutes (plus my lousy typing...)

Just be careful. SBCL warnings are generally quite helpful.

Given your goals, the best way to clear the warnings is to declare the variables in the function definition.

(defun some-special-function ()
  (declare (special *special-variable*))
  (do-something-with *special-variable*))

Thanks @nuntius, that's what I meant,
I didn't know, it's possible to declare variables special in this context