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

 Message        "<name>" has a non-void return type but its linkage
                "<name>" preserves the return register(s).  Standard
                linkage will be used.

 Description    The function or typedef's special linkage specifies
                that the register(s) used to return the function
                value are to be preserved.  This is invalid as the
                register can either be preserved, or hold the return
                value, but not both.

 User Action    Modify the #pragma linkage directive to either remove
                the register from the preserved list or to specify
                another register to hold the return value.