[MacPorts] #68730: gcc7 7.5.0_3 < 7.5.0_4, gcc8 8.5.0_1 < 8.5.0_2, gcc9 9.5.0_0 < 9.5.0_1 fails to build on mavericks

[MacPorts]

#68730: gcc7 7.5.0_3 < 7.5.0_4,  gcc8 8.5.0_1 < 8.5.0_2,  gcc9 9.5.0_0 < 9.5.0_1
fails to build on mavericks
-------------------------------+-----------------------
  Reporter:  tehcog            |      Owner:  (none)
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.8.1
Resolution:                    |   Keywords:  mavericks
      Port:  gcc7, gcc8, gcc9  |
-------------------------------+-----------------------

Comment (by catap):

 Here  the fix: https://github.com/macports/macports-ports/pull/21462

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Ticket URL: <https://trac.macports.org/ticket/68730#comment:3>
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