/sys$common/syshlp/helplib.hlb CC, Messages, BIFPROTO  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> the built-in function, "<name>", requires a
                prototype declaration from <filename>.

 Description    Invoking a built-in function requires that the
                function be declared before it is invoked.  This
                should be done by including the header file noted in
                the message.

 User Action    Include the header file before the function is
                invoked.