[MacPorts] #59207: perl5.28 build fails on Catalina with MacPorts 2.6.1 and Xcode 11.1

[MacPorts]

#59207: perl5.28 build fails on Catalina with MacPorts 2.6.1 and Xcode 11.1
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  Reporter:  nombak    |      Owner:  mojca
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  catalina
      Port:  perl5.28  |
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Comment (by alexanha):

 For those who don't get the issue fixed by setting
 `use_parallel_build=no`, try cleaning the port first and then reinstall,
 so run `sudo port clean --all perl5.28` and then `sudo port install
 perl5.28 use_parallel_build=no`. This did the trick in my case.

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Ticket URL: <https://trac.macports.org/ticket/59207#comment:17>
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