[MacPorts] #43809: port selfupgrade to base v2.3.0 fails on G4

[MacPorts]

#43809: port selfupgrade to base v2.3.0 fails on G4
--------------------------+--------------------------------
  Reporter:  paulccobb@…  |      Owner:  macports-tickets@…
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.3.0
Resolution:               |   Keywords:
      Port:               |
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Comment (by cal@…):

 This isn't a bug – the Tcllib package that we now install into our own
 private copy of Tcl needs a Tcl interpreter to install. Unfortunately we
 cannot use our private copy of Tcl to do this, because it hasn't been
 installed at this point.

 The Tcllib configure script searches for a copy of tclsh in standard paths
 using `ls $dir/tclsh[[8-9]]*` and `ls $dir/tclsh*` and selects the first
 one that's a real file, so it's no surprise that it picks up
 `/usr/bin/tclsh8.6-64` for you. If you need a newer Tcl, please install it
 in a directory other than `/usr/bin`.

-- 
Ticket URL: <https://trac.macports.org/ticket/43809#comment:2>
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