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- <sect2>
- <title>Contents</title>
- <para>
- The M4 package contains the M4 processor
- </para>
- </sect2>
- <sect2>
- <title>Description</title>
- <para>
- M4 is a macro processor. It copies input to output expanding macros as it
- goes. Macros are either built-in or user-defined and can take any number
- of arguments. Besides just doing macro expansion m4 has built-in functions
- for including named files, running UNIX commands, doing integer arithmetic,
- manipulating text in various ways, recursion, etc. M4 can be used either
- as a front-end to a compiler or as a macro processor in its own right.
- </para>
- </sect2>
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