[MacPorts] #65861: Can't be build on macOS 10.6

[MacPorts]

#65861: Can't be build on macOS 10.6
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  Reporter:  catap     |      Owner:  mascguy
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  graphviz  |
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Changes (by catap):

 * Attachment "main.log" added.


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Ticket URL: <https://trac.macports.org/ticket/65861>
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