/sys$common/syshlp/helplib.hlb LINK, Qualifiers, /EXECUTABLE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /EXECUTABLE[=file-spec] (default)
       /NOEXECUTABLE

    Directs the linker to create an executable image, as opposed to a
    shareable image or a system image.

    The file-spec specifies the character string you want the linker to
    use as the name of the image file that the link operation produces.
    If you do not specify a file type in the character string, the
    linker assigns the .EXE file type by default.

    If you do not specify a file name with the /EXECUTABLE qualifier,
    the linker creates an executable image with the file name of
    the first input file. If you append the /EXECUTABLE qualifier
    to an input file specification, the linker creates an executable
    image with the file name of the file to which the qualifier is
    appended.