[MacPorts] #61299: python3x: -Wno-unused-result in _sysconfigdata__darwin_darwin.py unrecognized by gcc 4.2

[MacPorts]

#61299: python3x: -Wno-unused-result in _sysconfigdata__darwin_darwin.py
unrecognized by gcc 4.2
-------------------------------------------------+-------------------------
  Reporter:  chrstphrchvz                        |      Owner:  jmroot
      Type:  defect                              |     Status:  assigned
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:  2.6.3
Resolution:                                      |   Keywords:
      Port:  python37 python38 python36 py-      |
  cchardet                                       |
-------------------------------------------------+-------------------------

Comment (by kencu):

 other than bootstrapping, or a few ports needed to bootstrap clang-9.0,
 like clang-3.7, every build on 10.6.8 should be using clang-9.0 to build.

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Ticket URL: <https://trac.macports.org/ticket/61299#comment:2>
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