[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@…):

 The issue here is that your iOS Simulator SDK doesn't support x86_64
 (because we added support for x86_64 in iOS 7).

 The real thing we want to check is if your iOS Simulator SDK supportx
 x86_64 and if not, restrict the iossim asan dylib to i386.

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Ticket URL: <https://trac.macports.org/ticket/48403#comment:4>
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