[MacPorts] #60348: libcxx fails to install on Leopard

[MacPorts]

#60348: libcxx fails to install on Leopard
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  Reporter:  DominusExult  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.6.2
Resolution:                |   Keywords:
      Port:  libcxx        |
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Comment (by DominusExult):

 hmm, yes, I wanted to explicitly use it for ppc and somehow missed to read
 on in the LibcxxOnOlderSystems - this seems to be futile to pursuit,
 bummer :(
 Can I follow your progress on this or is that not public at the moment?

 BUT the instructions for intel either do miss that you first need to
 install clang-3.4 or the libcxx portfile does not correctly check for this
 on Leopard. Because as I wrote, I executed this on a fresh MacPorts
 installation and thus had not installed clang-3-4 previously.
 And the part of editing the port file to be intel only could also need a
 mention in these instructions :)

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Ticket URL: <https://trac.macports.org/ticket/60348#comment:3>
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