如何从Perl调用C++静态库？

cpan install ExtUtils::MakeMaker
cpan install ExtUtils::CppGuess

#ifndef MYLIB_H
#define MYLIB_H

int add(int a, int b);

#endif

#include "mylib.h"

int add(int a, int b) {
    return a + b;
}

g++ -c mylib.cpp
ar rcs libmylib.a mylib.o

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include "mylib.h"

MODULE = MyLib PACKAGE = MyLib

int
add(a, b)
    int a
    int b
CODE:
    RETVAL = add(a, b);
OUTPUT:
    RETVAL

package MyLib;

use strict;
use warnings;
use ExtUtils::MakeMaker;

WriteMakefile(
    NAME => 'MyLib',
    VERSION => '0.01',
    ABSTRACT => 'Perl interface to C++ static library',
    CONFIGURE_REQUIRES => {
        'ExtUtils::MakeMaker' => '0',
    },
    PREREQ_PM => {
        'ExtUtils::MakeMaker' => '0',
    },
    LIBS => ['-L. -lmylib'],
    XS => {
        'MyLib.xs' => 'mylib.cpp',
    },
);

perl Makefile.PL
make

#!/usr/bin/perl

use strict;
use warnings;
use MyLib;

my $result = MyLib::add(5, 7);
print "Result: $result\n";