SELECTIVE (default)

    When the /SYSEXE qualifier is specified with no keyword, the
    linker processes the SYS$BASE_IMAGE.EXE file selectively.

    When you specify /SYSEXE with 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.

 NOSELECTIVE

    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.