[MacPorts] #42109: aircrack-ng: fatal error: 'sys/cdefs.h' file not found

[MacPorts]

#42109: aircrack-ng: fatal error: 'sys/cdefs.h' file not found
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  Reporter:  SPSFUL@…     |      Owner:  macports-tickets@…
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.2.1
Resolution:               |   Keywords:
      Port:  aircrack-ng  |
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Comment (by ryandesign@…):

 It builds fine for me on Mavericks. If it still fails for you, ensure you
 have installed the Xcode command line tools.

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Ticket URL: <https://trac.macports.org/ticket/42109#comment:2>
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