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

       /SHAREABLE[=file-spec]
       shareable-image-file-name/SHAREABLE

    When specified anywhere on the link command line, the /SHAREABLE
    qualifier directs the linker to create a shareable image. When
    you append the /SHAREABLE qualifier to a file specification in
    a linker options file, the system identifies the input file as a
    shareable image.

    When you use the /SHAREABLE qualifier to create a shareable
    image, the file-spec specifies the name you want the linker
    to assign to the shareable image being created. If you do not
    include a file specification, the linker assigns the shareable
    image the name of the file to which you append the /SHAREABLE
    qualifier in the LINK command line. If you do not append the
    /SHAREABLE qualifier to an input file specification, the linker
    assigns to the shareable image the name of the first input file
    specified on the command line using the extension .EXE.

    If you designate a file name but omit the file type, the linker
    assigns the shareable image the file type .EXE.

    The shareable-image-file-name specifies the name of a shareable
    image.   Note that you can use the /SHAREABLE qualifier to
    identify a shareable image only in a linker options file. It is
    illegal to include a shareable image in a link operation by
    specifying it on the LINK command line.