[MacPorts] #53374: Py-Pillow should have tkinter, and webp (or x11) variants

[MacPorts]

#53374: Py-Pillow should have tkinter, and webp (or x11) variants
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  Reporter:  dmarteau     |      Owner:  stromnov
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  py-Pillow    |
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Comment (by danchr):

 I noticed an issue related to this one: When Pillow is built against a Tk
 using X11 as a backend, it'll get a dependency on `libxcb`. The `+quartz`
 variant of `tk`, however, has no such dependency. As a result, the
 archives for `py-pillow` are broken against such a Tk. I posted a pull
 request to address this:

 https://github.com/macports/macports-ports/pull/8444

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Ticket URL: <https://trac.macports.org/ticket/53374#comment:12>
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