[MacPorts] #62356: gdb: add arm64 support

[MacPorts]

#62356: gdb: add arm64 support
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  Reporter:  platipodium  |      Owner:  (none)
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.4
Resolution:  wontfix      |   Keywords:  arm64 upstream
      Port:  gdb          |
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Comment (by kencu):

 lldb works well, fully supported by Apple, current OS support right up the
 minute.

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Ticket URL: <https://trac.macports.org/ticket/62356#comment:7>
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