[MacPorts] #48403: clang-3.7 asan_iossim dylib fails to build with Xcode 4.x due to sim SDK predating x86_64 support

[MacPorts]

#48403: clang-3.7 asan_iossim dylib fails to build with Xcode 4.x due to sim SDK
predating x86_64 support
---------------------------+------------------------
  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     |
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Comment (by jeremyhu@…):

 The provided patch doesn't really fix the problem in the build system.  It
 just disables support for earlier SDKs, but I don't really care about
 supporting asan on such old configs anyways.  If someone on ML wants it,
 they should update to the supported toolchain instead of sticking on Xcode
 4.x, so I'll commit it.

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Ticket URL: <https://trac.macports.org/ticket/48403#comment:6>
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