[MacPorts] #43463: p5-tk: nonfunctional bindings with libpng

[MacPorts]

#43463: p5-tk: nonfunctional bindings with libpng
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  Reporter:  mojca   |      Owner:  macports-tickets@…
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  p5-tk   |
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Comment (by chrstphrchvz):

 Possibly related upstream ticket (closed before this ticket was opened):
 https://rt.cpan.org/Ticket/Display.html?id=87016

 I can reproduce the errors/warnings above; to me that output suggests
 there is a bug in Tk::MakeDepend preventing it from parsing pngconf.h
 (from libpng).

 So far I've only tried displaying PNGs by running the `t/photo.t` test,
 and some of the PNG results seem brightened/more white than expected (see
 screenshot below). But this occurs on Linux and Windows as well.

 [[Image(https://trac.macports.org/raw-
 attachment/ticket/43463/Screen%20Shot%202018-11-09%20at%203.51.19%20AM.png)]]

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Ticket URL: <https://trac.macports.org/ticket/43463#comment:3>
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