/sys$common/syshlp/helplib.hlb CC, Messages, DCLMISMATLNK3  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        <where> "<name>" has a size that is incompatible with
                the number of registers specified by its linkage
                "<name>".  Standard linkage will be used.

 Description    The size of a parameter or return value of a function
                type is incompatible with the size specified by the
                special linkage.  The special linkage was specified
                via the #pragma use_linkage directive.  Because of
                this mismatch, the compiler will ignore the special
                linkage and use the standard linkage instead.

 User Action    Make sure the number of registers specified by the
                special linkage match the type of the corresponding
                parameter and return value.