I can't immediately see how:

MODULE = Test  PACKAGE = main
transforms into
MODULE = XS::Wrap  PACKAGE = XS::Wrap.

Is that done by hand ?

I'd attack the problem using InlineX::C2XS, but few others seem to share my enthusiasm for that (with good reasons, no doubt).
That is, for me, one way is to cd to some directory and create ./src/Wrap.c, where that file contains your C code: 
#include <stdio.h>
#include <xswrap.h>

void _arr (){
 unsigned char* c_array = arr();

 inline_stack_vars;
 inline_stack_reset;

 int i;

 for (i=0; i<3; i++){
  inline_stack_push(sv_2mortal(newSViv(c_array[i])));
 }

 inline_stack_done;
}

[download]
Then create a ./XS-Wrap-0.42 source distro directory.
Then create a ./build_src.pl that contains: 
use warnings;
use strict;
use InlineX::C2XS qw(c2xs);

my $options =
 {WRITE_PM => 1,
  WRITE_MAKEFILE_PL => 1,
  VERSION => '0.42',
  MANIF => 1,
  T => 1,
  EXPORT_OK_ALL => 1,
  EXPORT_TAGS_ALL => 'all',
 };

c2xs('XS::Wrap', 'XS::Wrap', './XS-Wrap-0.42', $options);

[download]
Then run perl build_src.pl
Then modify the files generated in ./XS-Wrap-0.42 as needed.
This could all be further customised and further automated, as could your approach.

Cheers,
Rob

In reply to Re: Wrapping a C shared library with Perl and XS by syphilis
in thread Wrapping a C shared library with Perl and XS by stevieb

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