[MacPorts] #57421: gmtl @0.6.1: AttributeError: 'NoneType' object has no attribute 'group'

[MacPorts]

#57421: gmtl @0.6.1: AttributeError: 'NoneType' object has no attribute 'group'
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  Reporter:  ryandesign  |      Owner:  mccdo@…
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  gmtl        |
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Comment (by ryandesign):

 This is happening because the SConstruct is getting the output of `$CXX
 -v` and is expecting it to match the regular expression `gcc version
 ((\d+)\.(\d+)\.(\d+))`. On a modern Mac there are no matches from that
 regular expression, of course, because `$CXX` isn't gcc anymore so its
 output doesn't contain the string `gcc version`.

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Ticket URL: <https://trac.macports.org/ticket/57421#comment:1>
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