does static function declaration require static definition?

["Robert P. J. Day" <rpjday@mindspring.com>]

  from my 5th edition of harbison and steele, p. 83, i read that the
"static" storage class specifier on a function "indicates that the
declared function will be defined -- with storage class static --
later in the file."

  doesn't this read that, once you declare the function as static, you
*must* define it as static as well?  gcc doesn't seem to have a
problem with leaving "static" off of the definition.

  of course, gcc certainly complains if you forget the "static" on the
declaration but put it on the definition further down.

rday