[MacPorts] #61440: gperf: error: ./configure failed for lib

[MacPorts]

#61440: gperf: error: ./configure failed for lib
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  Reporter:  ungur   |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:  bigsur
      Port:  gperf   |
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Comment (by ryandesign):

 Your command line tools are outdated: they don't contain the macOS 11 SDK.
 Update to the Xcode 12.2 command line tools.

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Ticket URL: <https://trac.macports.org/ticket/61440#comment:5>
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