Make a (symbolic) link called targetpath. If it cannot be created
          (platform limitation), we try to make a copy of the referenced file
          instead of a link.

def makelink(self, tarinfo, targetpath):
        """Make a (symbolic) link called targetpath. If it cannot be created
          (platform limitation), we try to make a copy of the referenced file
          instead of a link.
        """
        try:
            # For systems that support symbolic and hard links.
            if tarinfo.issym():
                os.symlink(tarinfo.linkname, targetpath)
            else:
                # See extract().
                if os.path.exists(tarinfo._link_target):
                    os.link(tarinfo._link_target, targetpath)
                else:
                    self._extract_member(self._find_link_target(tarinfo),
                                         targetpath)
        except symlink_exception:
            if tarinfo.issym():
                linkpath = os.path.join(os.path.dirname(tarinfo.name),
                                        tarinfo.linkname)
            else:
                linkpath = tarinfo.linkname
        else:
            try:
                self._extract_member(self._find_link_target(tarinfo),
                                     targetpath)
            except KeyError:
                raise ExtractError("unable to resolve link inside archive")