[MacPorts] #61750: base prefers arch of terminal in use rather than machine arch when installing ports

[MacPorts]

#61750: base prefers arch of terminal in use rather than machine arch when
installing ports
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  Reporter:  raw-bin  |      Owner:  (none)
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  base     |    Version:
Resolution:           |   Keywords:
      Port:           |
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Comment (by jmroot):

 So we pieced together in IRC that it is and isn't the terminal. User had a
 universal base installed from the pkg, and ran it from a terminal emulator
 that was x86_64 only. Being x86_64, this ran the x86_64 slice of the shell
 which ran the x86_64 slice of the MacPorts tclsh. This naturally causes
 tcl_platform to report x86_64. MacPorts is defaulting to building for the
 arch it is running as, which can be unexpected if you don't realise that
 your shell is running in Rosetta, but it's not really incorrect. Clang
 behaves exactly the same way.

-- 
Ticket URL: <https://trac.macports.org/ticket/61750#comment:32>
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