An example code to call libperl from ruby using DL::Import

dlperl.rb

# call libperl from ruby 1.9.x

require 'dl'
require 'dl/import'
require 'dl/struct'
require 'pp'

module Perl
  extend DL::Importer
  dlload "libperl.so"
  extern "struct interpreter * perl_alloc(void)"
  extern "void perl_construct(struct interpreter *)"
  extern "int perl_parse(struct interpreter *, void *, int, char**, char**)"
  extern "int perl_run(struct interpreter *)"
  extern "int perl_destruct(struct interpreter *)"
  extern "void perl_free(struct interpreter *)"
end

null = DL::CPtr.new(0);
perl =  Perl.perl_alloc()
Perl.perl_construct(perl)
Perl.perl_parse(perl, null, 1, ["perl"].pack('p*'), null)
Perl.perl_run(perl)
Perl.perl_destruct(perl)
Perl.perl_free(perl)