[MacPorts] #62816: Buildbot: building XCode project on 10.14.4 fails with: Swift does not support the SDK 'MacOSX10.14.sdk'

[MacPorts]

#62816: Buildbot: building XCode project on 10.14.4 fails with: Swift does not
support the SDK 'MacOSX10.14.sdk'
----------------------------+---------------------
  Reporter:  lhaeger        |      Owner:  admin@…
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:  2.6.4
Resolution:                 |   Keywords:
      Port:  AutoRaise      |
----------------------------+---------------------

Comment (by kencu):

 MacPorts specifically forces the SDK that matches the system version by
 default.

 It can be changed with {{{configure.sdkroot}}}.

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Ticket URL: <https://trac.macports.org/ticket/62816#comment:1>
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