VMS Help LINK, Qualifiers, /SYSEXE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /SYSEXE[=[NO]SELECTIVE]
       /NOSYSEXE (default)

    For Alpha linking, directs the linker to process the system
    shareable image, SYS$BASE_IMAGE.EXE, in a link operation. The
    linker looks for SYS$BASE_IMAGE.EXE in the directory that the
    logical name ALPHA$LOADABLE_IMAGES points to.

    When you specify the SELECTIVE keyword, the linker processes the
    SYS$BASE_IMAGE.EXE file selectively, including only those symbols
    from the global symbol table of the SYS$BASE_IMAGE.EXE file
    that were referenced by input files previously processed in the
    link operation. When you specify the /SYSEXE qualifier without a
    keyword, the linker processes the executive image selectively.

    When you specify the NOSELECTIVE keyword, the linker includes all
    the symbols from the SYS$BASE_IMAGE.EXE global symbol table in
    the link operation.

    When you specify the /SYSEXE qualifier without a keyword, the
    linker processes the executive image selectively.