VMS Help CC, Messages, BITNOTINT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> the bitfield type is not an int, signed
                int, unsigned int or _Bool.

 Description    A bitfield has been declared with a type other than
                int, signed int, unsigned int or _Bool.  This is not
                allowed by the C standard.

 User Action    Change the declaration to use one of the allowed
                types or compile with a standard mode that allows
                this behavior.