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<?xml version="1.0"?>
<!--
Copyright (c) 2001 - 2019 The SCons Foundation
This file is processed by the bin/SConsDoc.py module.
See its __doc__ string for a discussion of the format.
-->
<!DOCTYPE sconsdoc [
<!ENTITY % scons SYSTEM '../../../../doc/scons.mod'>
%scons;
<!ENTITY % builders-mod SYSTEM '../../../../doc/generated/builders.mod'>
%builders-mod;
<!ENTITY % functions-mod SYSTEM '../../../../doc/generated/functions.mod'>
%functions-mod;
<!ENTITY % tools-mod SYSTEM '../../../../doc/generated/tools.mod'>
%tools-mod;
<!ENTITY % variables-mod SYSTEM '../../../../doc/generated/variables.mod'>
%variables-mod;
]>
<sconsdoc xmlns="http://www.scons.org/dbxsd/v1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.scons.org/dbxsd/v1.0 http://www.scons.org/dbxsd/v1.0/scons.xsd">
<tool name="m4">
<summary>
<para>
Sets construction variables for the &m4; macro processor.
</para>
</summary>
<sets>
<item>M4</item>
<item>M4FLAGS</item>
<item>M4COM</item>
</sets>
<uses>
<item>M4COMSTR</item>
</uses>
</tool>
<builder name="M4">
<summary>
<para>
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:
</para>
<example_commands>
env.M4(target = 'foo.c', source = 'foo.c.m4')
</example_commands>
</summary>
</builder>
<cvar name="M4">
<summary>
<para>
The M4 macro preprocessor.
</para>
</summary>
</cvar>
<cvar name="M4COM">
<summary>
<para>
The command line used to pass files through the M4 macro preprocessor.
</para>
</summary>
</cvar>
<cvar name="M4COMSTR">
<summary>
<para>
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.
</para>
</summary>
</cvar>
<cvar name="M4FLAGS">
<summary>
<para>
General options passed to the M4 macro preprocessor.
</para>
</summary>
</cvar>
</sconsdoc>
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