[MacPorts] #67729: lzma is broken now with Apple GCC: error: #pragma GCC diagnostic not allowed inside functions

[MacPorts]

#67729: lzma is broken now with Apple GCC: error: #pragma GCC diagnostic not
allowed inside functions
---------------------------+-----------------------------------------
  Reporter:  barracuda156  |      Owner:  ryandesign
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:  tiger, leopard, snowleopard
      Port:  lzma          |
---------------------------+-----------------------------------------

Comment (by aeiouaeiouaeiouaeiouaeiouaeiou):

 https://stackoverflow.com/a/16555760

 I think we should copy the compiler blacklist from
 [https://github.com/macports/macports-
 ports/blob/2cc7419d8d08b3122bc8947f1c6d9b0328bc6110/archivers/7zip/Portfile#L59
 7zip portfile].

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Ticket URL: <https://trac.macports.org/ticket/67729#comment:1>
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