#include "myclass.h"

using namespace std;

MyClass::MyClass (int length, int width) {
	this->length = length;
	this->width = width;
}

int MyClass::area() {
	return this->length*this->width;
}
</class>

Makefile.PL
This I basically took from the Tutorial mentioned in the Into, and adjusted it to my changes. 
<code>
use ExtUtils::MakeMaker;
my ( $CC, $Verbose ) = ( 'g++', 1 );
WriteMakefile(
	NAME    => 'Mytest::myclass',
	SKIP    => [qw(all static static_lib dynamic dynamic_lib)],
	clean   => {'FILES' => 'libmyclass$(LIB_EXT) unitTest'},
	CC      => $CC, # Our CPP compiler
	LD      => '$(CC)',
	CCFLAGS => '-fPIC', # this instructs the CPP compiler to use "Position independence", basically a shared library, more details here
							# http://www.fpx.de/fp/Software/tcl-c++/tc+l-c++.html
);
sub MY::top_targets {
'
all :: static
pure_all :: static
static :: libmyclass$(LIB_EXT)

libmyclass$(LIB_EXT): $(O_FILES)
		$(AR) cr libmyclass$(LIB_EXT) $(O_FILES)
		$(RANLIB) libmyclass$(LIB_EXT)

bin: $(O_FILES)
		$(LD) $(O_FILES) -o unitTest
';
}