[MacPorts] #58083: port:libtool should use depends_skip_archcheck-append for the xattr dependency

[MacPorts]

#58083: port:libtool should use depends_skip_archcheck-append for the xattr
dependency
----------------------+--------------------
  Reporter:  RJVB     |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  libtool  |
----------------------+--------------------

Comment (by RJVB):

 My hunch was correct: the issue disappeared when I uninstalled port:xattr.
 It seems I must have installed that port a few months ago for reasons I
 can't remember. Either I didn't realise the command was available through
 the system, or I thought MacPorts has a newer version (as for so many) and
 didn't notice that's not the case here.

 So yeah, I think the proper way to pull in port:xattr is via a standard
 depspec but only on OS version(s) that require it. And maybe port:xattr
 should be marked obsolete on all other platforms?

-- 
Ticket URL: <https://trac.macports.org/ticket/58083#comment:3>
MacPorts <https://www.macports.org/>
Ports system for macOS