[MacPorts] #57454: some kind of issue (as yet unclear) trying to build boost on an unknown system

[MacPorts]

#57454: some kind of issue (as yet unclear) trying to build boost on an unknown
system
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  Reporter:  WenyiY  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.5.4
Resolution:          |   Keywords:
      Port:  boost   |
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Comment (by WenyiY):

 Thank you for find out this issue, I did have a lot of stuff installed
 under this path, like git, Homebrew. I wonder if I clean these up, it will
 affect some other programs I installed inside?
 Also, when I was trying to clean it using {{{sudo mv /usr/local /usr
 /local-saved}}}, it returned {{{mv: rename /usr/local to /usr/local-saved:
 Operation not permitted}}}.

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Ticket URL: <https://trac.macports.org/ticket/57454#comment:10>
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