[MacPorts] #59133: libgcc9 fails to build with Mojave and Xcode 11 latestrelease

[MacPorts]

#59133: libgcc9 fails to build with Mojave and Xcode 11 latestrelease
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  Reporter:  vdoublie  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.6.0
Resolution:            |   Keywords:
      Port:  libgcc9   |
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Comment (by mouse07410):

 It would be awfully nice if in addition to "I (finally) got 'it' working"
 (whatever 'it' might be) people would spare a few words on **how**.

 E.g., following one of the advices given where? Another MacPorts ticket?
 Which one?

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Ticket URL: <https://trac.macports.org/ticket/59133#comment:7>
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