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This chapter covers the following topics.

 .  Command line syntax (see Watcom C/C++ Command Line Format)
 .  Environment variables used by the compilers (see Environment Variables)
 .  Examples of command line syntax (see Watcom C/C++ Command Line Examples)
 .  Interpreting diagnostic messages (see Compiler Diagnostics)
 .  #include file handling (see Watcom C/C++ #include File Processing)
 .  Using the preprocessor built into the compilers (see
    Watcom C/C++ Preprocessor)
 .  System-dependent macros predefined by the compilers (see
    Watcom C/C++ Predefined Macros)
 .  Additional keywords supported by the compilers (see
    Watcom C/C++ Extended Keywords)
 .  Based pointer support in the compilers (see Based Pointers)
 .  Notes about the Code Generator (see The Watcom Code Generator)