[MacPorts] #39605: clang-3.3: upgrade failure on 10.6 - Availability.h not found

[MacPorts]

#39605: clang-3.3: upgrade failure on 10.6 - Availability.h not found
-------------------------------+----------------------
  Reporter:  david.w.watson@…  |      Owner:  mfeiri@…
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.1.3
Resolution:                    |   Keywords:
      Port:  clang-3.3         |
-------------------------------+----------------------

Comment (by mymacports@…):

 I have uninstalled dyld-headers and xnu-headers.[[BR]]
 After that clang-3.3 was compiled without errors.[[BR]]
 Thanks! [[BR]]

 [[BR]]
 Replying to [comment:19 jeremyhu@…]:
 > Replying to [comment:18 mymacports@…]:
 > > 1. "... and all those other ports that conflict with system
 headers"[[BR]]
 > >    There are no other problems except the one with clang-3.3[[BR]]
 >
 > As one of the engineers who maintains those projects for OS X, and a
 MacPorts maintainer who has seen enough tickets from their fallout, I
 assure you there are.
 >
 > > 2. I do not have libc-headers and/or CarbonHeaders installed.[[BR]]
 >
 > Ok, in your case, it's the dyld-headers and xnu-headers.  Please nuke
 those.

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Ticket URL: <https://trac.macports.org/ticket/39605#comment:24>
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