Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide

Command-line help

To display NMAKE help, type nmake /? at the prompt. The appropriate copyright statement appears, along with the following:

Usage:
      NMAKE @commandfile
      NMAKE /help

      NMAKE [/nologo] [/acdeinpqrst?] [/f makefile] [/x stderrfile]

      [macrodefs][targets]

What the options stand for
  /a       Force all targets to be built
  /c       Cryptic mode; suppress sign-on banner & warning messages
  /d       Display modification dates
  /e       Environment variables override macros in the makefile
  /i       Ignore exit codes of commands invoked
  /n       No execute mode; display commands only
  /p       Print macro definitions & target descriptions
  /q       Query if target is up to date; for use in batch files
  /r       Inference Rules from 'TOOLS.INI' to be ignored
  /s       Silent execution of commands
  /t       Touch targets with current date & time
  /?       Help message
  /help    Help message
  /nologo  Do not display sign-on banner
Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide