[MacPorts] #64559: ncplot @4.9.12: Use the right flags and compiler

[MacPorts]

#64559: ncplot @4.9.12: Use the right flags and compiler
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  Reporter:  ryandesign  |      Owner:  mf2k
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:  fixed       |   Keywords:
      Port:  ncplot      |
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Comment (by mf2k):

 I worked with upstream to fix some of the build issues. They acknowledge
 more work needs to be done (Converting more files from .c to .cc).

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Ticket URL: <https://trac.macports.org/ticket/64559#comment:4>
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