[MacPorts] #69147: folly fails on 10.8.5: error: no type named '__cxa_increment_exception_refcount' in namespace '__cxxabiv1'

[MacPorts]

#69147: folly fails on 10.8.5: error: no type named
'__cxa_increment_exception_refcount' in namespace '__cxxabiv1'
-------------------------+-------------------------------------------------
  Reporter:              |      Owner:  barracuda156
  barracuda156           |
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:  mountainlion, lion, snowleopard,
      Port:  folly       |  x86_64, i386
-------------------------+-------------------------------------------------

Comment (by barracuda156):

 Well, this breaks `folly`: #69150

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Ticket URL: <https://trac.macports.org/ticket/69147#comment:4>
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