[MacPorts] #42872: cmake PortGroup: don't add -I${prefix}/include to CXXFLAGS

[MacPorts]

#42872: cmake PortGroup: don't add -I${prefix}/include to CXXFLAGS
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  Reporter:  mojca@…  |      Owner:  macports-tickets@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:           |
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Comment (by mojca@…):

 I committed the patch in r121112. I'll go ahead and remove workarounds
 from ports that tried to overcome the problem by removing the flag
 manually.

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Ticket URL: <https://trac.macports.org/ticket/42872#comment:18>
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