VMS Help MACRO, VAX MACRO Assembler, Directives, .MCALL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies the names of the system and/or user-defined macros that
    are required  to  assemble  the source program but are not defined
    in the source file.

      .MCALL macro-name-list

    macro-name-list

    A list of macros to be defined for this assembly.  Separate the
    macro names with commas.

    You must use .MCALL when a macro has the same name as an opcode.