h2xs -A -n two_test

cd two_test

mkdir mylib

#include<stdio.h>
void chen(char *);

#include "chen.h"
void chen(char * name){
printf("input string is : %s\n", name);
}

gcc -c chen.c
ar -r libchen.a chen.o

cp libchen.a two_test/mylib/
cp chen.h two_test/mylib

use 5.014002;
use ExtUtils::MakeMaker;
# See lib/ExtUtils/MakeMaker.pm for details of how to influence
# the contents of the Makefile that is written.
WriteMakefile(
NAME => 'two_test',
VERSION_FROM => 'lib/two_test.pm', # finds $VERSION
PREREQ_PM => {}, # e.g., Module::Name => 1.1

($] >= 5.005 ? ## Add these new keywords supported since 5.005
(ABSTRACT_FROM => 'lib/two_test.pm', # retrieve abstract from module
AUTHOR => 'root <root@>') : ()),
LIBS => [''], # e.g., '-lm'
DEFINE => '', # e.g., '-DHAVE_SOMETHING'
INC => '-I.', # e.g., '-I. -I/usr/include/other'
# Un-comment this if you add C files to link with later:
# OBJECT => '$(O_FILES)', # link all the C files too
MYEXTLIB => 'mylib/libchen.a'
);

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

#include "ppport.h"
#include "mylib/chen.h"

MODULE = two_test PACKAGE = two_test

void
chen(name)
char * name

perl Makefile.PL
make
make install

#!/usr/bin/perl
use two_test;
$one = "sfjak";
&two_test::chen($one);

perl two_test.pl