The full command-line option is /LIBRARY[=file-spec].

    Searches macro libraries in the following order:

    1. The library designated by the /LIBRARY qualifier.

    2. The .LIBRARY directives.

    3. The MACRO64.MLB library. The assembler searches for the
       MACRO64.MLB macro library in the following locations:
       MACRO64$LIBRARY, ALPHA$LIBRARY, and finally SYS$LIBRARY.

    4. The STARLET.MLB library. The assembler searches for the
       STARLET.MLB macro library in the following locations:
       MACRO64$LIBRARY, ALPHA$LIBRARY, and finally SYS$LIBRARY.

    In addition, you can place the macro library definitions in the
    listing file by using the command-line qualifier /SHOW=LIBRARY.