[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
-----------------------+----------------------
  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 mojca):

 In [changeset:"7b977ef7ce92037f9b0a85d0b1045c2fc82d9bc4/macports-ports"
 7b977ef7ce92037f9b0a85d0b1045c2fc82d9bc4/macports-ports] (master):
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="7b977ef7ce92037f9b0a85d0b1045c2fc82d9bc4"
 perl5: avoid parallel builds on Catalina

 See: https://trac.macports.org/ticket/59207
 }}}

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Ticket URL: <https://trac.macports.org/ticket/59207#comment:21>
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