[MacPorts] #53931: clang's ld doesn't recognise "-lto_library" flag on 10.6

[MacPorts]

#53931: clang's ld doesn't recognise "-lto_library" flag on 10.6
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  Reporter:  mojca                               |      Owner:  jeremyhu
      Type:  defect                              |     Status:  new
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:  snowleopard
      Port:  clang-3.9 clang-4.0 llvm-3.9        |
  llvm-4.0                                       |
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Comment (by kencu):

 This is very weird.

 I wonder if this is related to clang 3.9 defaulting to libstdc++ now, and
 not finding the libc++ environment on 10.6 (Marcus' changes for cxx11)...

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Ticket URL: <https://trac.macports.org/ticket/53931#comment:1>
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