[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:  reopened
  Priority:  Normal                      |  Milestone:
 Component:  ports                       |    Version:  2.1.3
Resolution:                              |   Keywords:
      Port:  wireshark, wireshark-devel  |
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Comment (by jmr@…):

 You have to depend on things that you use directly. If wireshark is caling
 libpng functions, it should depend on libpng. OTOH, it doesn’t need to
 depend on zlib just because libpng uses zlib; the dependency in the libpng
 portfile takes care of that. (Unless it is calling zlib functions itself
 and not just letting libpng call them, of course…)

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Ticket URL: <https://trac.macports.org/ticket/38005#comment:11>
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