[MacPorts] #59888: sparsehash should either be noarch or keep its universal veriant

[MacPorts]

#59888: sparsehash should either be noarch or keep its universal veriant
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  Reporter:  devernay    |      Owner:  ryandesign
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:  fixed       |   Keywords:
      Port:  sparsehash  |
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Comment (by ryandesign):

 Oh. No, it doesn't require a particular version of the C++ standard. But
 it builds differently depending on what the C++ standard library is. If we
 set supported_archs to noarch, we no longer know what C++ standard library
 is in use on the user's system.

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Ticket URL: <https://trac.macports.org/ticket/59888#comment:8>
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