[MacPorts] #67403: imath, openexr broken with gcc: missing header for PRIx64 etc.

[MacPorts]

#67403: imath, openexr broken with gcc: missing header for PRIx64 etc.
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  Reporter:  barracuda156    |      Owner:  mascguy
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.8.1
Resolution:                  |   Keywords:
      Port:  imath, openexr  |
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Comment (by barracuda156):

 I will make a PR to fix all three.

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Ticket URL: <https://trac.macports.org/ticket/67403#comment:4>
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