[MacPorts] #61262: ImageMagick @6.9.11-31: build fails using Xcode 12.0.1 (implicit-function-declaration)

[MacPorts]

#61262: ImageMagick @6.9.11-31: build fails using Xcode 12.0.1 (implicit-function-
declaration)
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  Reporter:  dbevans      |      Owner:  ryandesign
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  ImageMagick  |
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Changes (by dbevans):

 * Attachment "main.log" added.

 Build log showing failure

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Ticket URL: <https://trac.macports.org/ticket/61262>
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