/sys$common/syshlp/helplib.hlb MACRO, /MIGRATION, Compiler Directives, .ENABLE, Parameters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 argument-list

    You can use one or more of the symbolic arguments listed in the
    following table:

    Option      Description

    DEBUG       Includes local symbol table information in the
                object file for use with the debugger. For this
                to take effect, you must compile with /DEBUG or
                /ENABLE=DEBUG.
    FLAGGING    Activates compiler flagging.
    GLOBAL      Assumes undefined symbols are external symbols.
    OVERFLOW    Activates production of overflow trap code for the
                following opcodes: ADDx, ADWC, INCx, ADAWI, SUBx,
                SBWC, DECx, MNEGx, MULx, CVTxy (where x is greater
                than y, for example CVTLB), AOBxx, ACBL, and SOBxx.
    QUADWORD    Provides support for quadword literal and address
                expressions.
    SUPPRESSION Provides a listing of unreferenced symbols in the
                symbol table.
    TRACEBACK   Provides traceback information to the debugger. For
                this to take effect, you must compile with /DEBUG or
                /ENABLE=TRACEBACK.