[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@…):

 List of ports that likely removed `cppflags` because of this problem:

   * `_resources/port1.0/group/kde4-1.1.tcl`
   * `graphics/glfw`
   * `print/libLASi`
   * `science/bladeRF`
   * `science/clhep`
   * `science/gnuradio`
   * `science/gr-baz`
   * `science/gr-fcdproplus`
   * `science/gr-fosphor`
   * `science/gr-iqbalance`
   * `science/gr-osmosdr`
   * `science/gr-rds`
   * `science/hackrf`
   * `science/root6`
   * `science/rtl-sdr`
   * `science/uhd`

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Ticket URL: <https://trac.macports.org/ticket/42872#comment:19>
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