[MacPorts] #58978: Unable to Upgrade xar or python27 - Fails to configure

[MacPorts]

#58978: Unable to Upgrade xar or python27 - Fails to configure
---------------------------+--------------------
  Reporter:  RobK88        |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.5.4
Resolution:                |   Keywords:  Lion
      Port:  xar python27  |
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Comment (by kencu):

 we'll have to find at least one compiler on your system that still works.
 The system clang should work still!  So should clang-3.7.

 Clean, and force clang-3.7, and pop up your config.log so we can see how
 it died.

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Ticket URL: <https://trac.macports.org/ticket/58978#comment:3>
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