[MacPorts] #38005: wireshark doesn't build without libpng

[MacPorts]

#38005: wireshark doesn't build without libpng
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  Reporter:  jkh@…                       |      Owner:  opendarwin.org@…
      Type:  defect                      |     Status:  new
  Priority:  Normal                      |  Milestone:
 Component:  ports                       |    Version:  2.1.3
Resolution:                              |   Keywords:
      Port:  wireshark, wireshark-devel  |
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Comment (by egall@…):

 According to my
 [https://github.com/cooljeanius/macportsscripts/blob/master/port-
 depcheck.sh port-depcheck.sh] script, there's a whole host of libraries
 (besides just libpng) that wireshark links against but doesn't declare a
 dependency on. I'll attach a diff next.

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Ticket URL: <https://trac.macports.org/ticket/38005#comment:5>
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