[MacPorts] #53138: clang-3.x: fails to build on Mountain Lion, possible circular dependencies

[MacPorts]

#53138: clang-3.x: fails to build on Mountain Lion, possible circular dependencies
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  Reporter:  maxkalashnikov-macports             |      Owner:  jeremyhu
      Type:  defect                              |     Status:  reopened
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:  2.3.5
Resolution:                                      |   Keywords:
      Port:  clang-3.3 clang-3.4 clang-3.5       |
  clang-3.6 clang-3.7 clang-3.8 clang-3.9        |
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Comment (by jeremyhu):

 Ah.

 ld64-X depends on llvm39 (or llvm38), but your version of Xcode is too old
 to build llvm, so it tries to use the fallback (macports-clang-X.Y).  That
 depends on ld64, and cycle.

 I suggest you install ld64 with the +ld64_xcode variant, then install
 clang-3.9, then deactivate and reinstall ld64 (with -ld64_xcode)

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Ticket URL: <https://trac.macports.org/ticket/53138#comment:6>
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