[MacPorts] #48403: clang-3.7 3.7-r241984: build failed fatal error: 'mach/x86_64/task.h' file not found when xcode-4.x on mountain lion

[MacPorts]

#48403: clang-3.7 3.7-r241984: build failed fatal error: 'mach/x86_64/task.h' file
not found when xcode-4.x on  mountain lion
---------------------------+------------------------
  Reporter:  h.rayflood@…  |      Owner:  jeremyhu@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.3.3
Resolution:                |   Keywords:  haspatch
      Port:  clang-3.7     |
---------------------------+------------------------

Comment (by jeremyhu@…):

 I know it's dependent on xcodeversion, but I decided to be *MORE*
 restrictive since I didn't want people with Xcode 4.2 on SL to use it, so
 I just did "<= SL" instead of "< Xcode 4"

 The issue you're hitting is different than the earlier issue.

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Ticket URL: <https://trac.macports.org/ticket/48403#comment:3>
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