[MacPorts] #40123: Gnuplot build failure: undefined symbol _gdImagePng for architecture x86_64

[MacPorts]

#40123: Gnuplot build failure: undefined symbol _gdImagePng for architecture x86_64
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  Reporter:  william@…  |      Owner:  mojca@…
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.2.0
Resolution:             |   Keywords:
      Port:  gnuplot    |
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Comment (by kurt.pfeifle@…):

 Replying to [comment:3 ryandesign@…]:
 > I noticed this error on the Snow Leopard buildbot too. It built fine on
 my Mountain Lion system.

 I'm seeing the exact same failure on Mountain Lion. Was about to create a
 ticket, but saw that this one was created a few minutes ago already.

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Ticket URL: <https://trac.macports.org/ticket/40123#comment:4>
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