After my initial gaff, I'll have another crack at providing something that might be marginally useful - and I second stevieb's request for more info.
Inline::CPP and (Inline::C) seem to be quite happy to directly access the library's version() function: Here's the Inline::CPP demo:

################
package FOO;
use strict;
use warnings;

use Inline CPP => Config =>
 BUILD_NOISY => 1, 
 ;

use Inline CPP => <<'EOC';

int version(void * p) {
  return 42;
}

EOC

my $sv = 'whatever';
my $obj = bless \$sv, 'FOO';
print $obj->version();
################
[download]

That works just fine and outputs '42'.
Of course, it's a little bit different in your case because version() is in a separate library, so your script would be something like:

################
package FOO;
use strict;
use warnings;

use Inline CPP => Config =>
 INC => '/path/to/include',
 LIBS => '-L/path/to/library -lmy_lib',
 BUILD_NOISY => 1,
 ;

use Inline CPP => <<'EOC';

#include <my_lib.h>

int wrap_version(SV * p) {
  return version(p);
}

EOC

my $sv = 'whatever';
my $obj = bless \$sv, 'FOO';
print $obj->wrap_version();
################
[download]

or, if you want to call the sub from perl as "version":

################
package FOO;
use strict;
use warnings;

use Inline CPP => Config =>
 PREFIX => 'wrap_',
 INC => '/path/to/include',
 LIBS => '-L/path/to/library -lmy_lib',
 BUILD_NOISY => 1,
 ;

use Inline CPP => <<'EOC';

#include <my_lib.h>

int wrap_version(SV * p) {
  return version(p);
}

EOC

my $sv = 'whatever';
my $obj = bless \$sv, 'FOO';
print $obj->version();
################
[download]

I think SWIG should be capable of providing the same result.

Cheers,
Rob