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

       /FLAG=(option[,...])
       /NOFLAG

    Specifies which classes of informational messages the compiler
    reports. The options are:

    Option          Description

    ALIGNMENT       Reports unaligned stack and memory references.
    ALL             Enables all options.
    ARGLIST         Reports that the argument list has been homed.
    CODEGEN         Reports run-time code generation, such as self-
                    modifying code.
    DIRECTIVES      Reports unsupported directives.
    HINTS           Reports input/output/auto-preserved register
                    hints.
    INSTRUCTIONS    Reports instructions that use absolute addresses
                    that may compile correctly, but should be
                    examined anyway, because the desired absolute
                    address may be different on an Alpha computer.
    JUMPS           Reports branches between routines.
    NONE            Disables all options.
    STACK           Reports all messages caused by user stack
                    manipulation.

    At compiler activation, flagging is enabled by default for all
    options except HINTS.

                                   NOTE

       Use of the /NOFLAG and /FLAG qualifiers together to
       activate a specific subset of cross-compiler messages
       does not work as expected. When used together, as in
       /NOFLAG/FLAG=(keyword,keyword), instead of activating only
       the messages specified by the keywords, all cross-compiler
       messages are activated. However, use of /FLAG=(none,keyword)
       activates only those messages specified by the keyword.

    Note that specifying /NOFLAG or /FLAG=NONE does not disable the
    reporting of coding constructs that would prevent a successful
    compilation. The compiler continues to report code that you must
    change, such as an up-level stack reference.