[MacPorts] #36102: darktable: fails to build with libpng15, please upgrade to 1.0.5

[MacPorts]

#36102: darktable: fails to build with libpng15, please upgrade to 1.0.5
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  Reporter:  michael.klein@…  |      Owner:  macports-tickets@…
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.1.2
Resolution:                   |   Keywords:
      Port:  darktable        |
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Comment (by dali43@…):

 I get the same error in file png.c .
 Same error after port clean --all darktable.
 Attaching main.log of my second attempt.

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Ticket URL: <https://trac.macports.org/ticket/36102#comment:2>
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