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<!--
Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 The SCons Foundation
This file is processed by the bin/SConsDoc.py module.
See its __doc__ string for a discussion of the format.
-->
<tool name="m4">
<summary>
Sets construction variables for the &m4; macro processor.
</summary>
<sets>
M4
M4FLAGS
M4COM
</sets>
<uses>
M4COMSTR
</uses>
</tool>
<builder name="M4">
<summary>
Builds an output file from an M4 input file.
This uses a default &cv-link-M4FLAGS; value of
<option>-E</option>,
which considers all warnings to be fatal
and stops on the first warning
when using the GNU version of m4.
Example:
<example>
env.M4(target = 'foo.c', source = 'foo.c.m4')
</example>
</summary>
</builder>
<cvar name="M4">
<summary>
The M4 macro preprocessor.
</summary>
</cvar>
<cvar name="M4COM">
<summary>
The command line used to pass files through the M4 macro preprocessor.
</summary>
</cvar>
<cvar name="M4COMSTR">
<summary>
The string displayed when
a file is passed through the M4 macro preprocessor.
If this is not set, then &cv-link-M4COM; (the command line) is displayed.
</summary>
</cvar>
<cvar name="M4FLAGS">
<summary>
General options passed to the M4 macro preprocessor.
</summary>
</cvar>
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