[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 mojca):

 Replying to [comment:10 kencu]:
 >
 > As part of the [wiki:LibcxxOnOlderSystems] instructions, ld64 is meant
 to be upgraded to ld64_136 on snowleopard, it appears:
 >
 > {{{
 > sudo port -v upgrade --enforce-variants ld64 -ld64_97 -ld64_127
 -ld64_236
 > sudo port -v deactivate ld64_127
 > }}}

 No, `ld64_136` no longer exists, so this would be `ld64_latest`.

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Ticket URL: <https://trac.macports.org/ticket/53931#comment:12>
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