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

 Message        <Context> stdarg.h macros might be required if the
                address of the parameter <name> is used to index
                through a parameter list.

 Description    Some older C programs will traverse a function's
                parameter list by taking the address of one of the
                parameters and then adjusting it to get to subsequent
                parameters.  In most cases, this technique will not
                produce the desired results on Alpha.  This message
                is specific to UNIX, and is only output if -varargs
                option is specified.

 User Action    If the address is used to walk the parameter list,
                recode the function to use the standard stdarg.h
                macros.