VMS Help CC, Messages, INCARRAYPARM1  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <Context> allowing an array parameter that has more
                than two unspecified element counts is a language
                extension.

 Description    Because this parameter declaration will cause an
                array of incomplete types to be created, it does not
                conform to the C standard.  Although some other C
                compilers will accept this declaration, many
                compilers will reject it.

 User Action    Be aware of this difference if you plan to port this
                source to another compiler.