checks.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
    "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
<module name="Checker">
	<property name="severity" value="warning"/>

	<module name="StrictDuplicateCode">
		<property name="min" value="50"/>
		<!-- due to the gpl-header this produces tons of output. to get
		valuable output try something like: 
		scons -c
		checkstyle -c checks.xml -r src/ | grep -v "line [1-9]$"
		-->
	</module>
    <module name="NewlineAtEndOfFile"/>
    <module name="TreeWalker">
        <module name="FileLength"/>
        <module name="LineLength"/>
        <module name="MethodLength"/>
        <module name="ParameterNumber"/>

        <module name="EmptyBlock"/>
        <module name="LeftCurly"/>
        <module name="NeedBraces"/>
        <module name="RightCurly"/>

        <module name="MagicNumber"/>
        <module name="MissingSwitchDefault"/>

        <module name="TodoComment"/>
    </module>

</module>