/SHARE
       /NOSHARE (default)

    Controls whether the debugger includes, in the SHOW MODULE
    display, any shareable images that have been linked with your
    program. By default (/NOSHARE) no shareable image modules are
    selected for display.

    The debugger creates dummy modules for each shareable image in
    your program. The names of these shareable "image modules" have
    the prefix SHARE$. The SHOW MODULE/SHARE command identifies these
    shareable image modules, as well as the modules in the current
    image.

    Setting a shareable image module loads the universal symbols
    for that image into the run-time symbol table so that you can
    reference these symbols from the current image. However, you
    cannot reference other (local or global) symbols in that image
    from the current image. This feature overlaps the effect of the
    newer SET IMAGE and SHOW IMAGE commands.