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

[MacPorts]

#43809: port selfupgrade to base v2.3.0 fails on G4
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  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 paulccobb@…):

 Many thanks for coming back quickly with these two replies.  I had picked
 up a new Tcl because I needed >=8.5 for something I was working on, but I
 can live with it being somewhere other than /usr/bin, at least as a
 temporary workaround.

 I understand the point that you can't rely on any particular tlcsh path
 and/or version in the early stages of the installation.  Couple of quick
 thoughts, for whatever they're worth:

 1. Would it be possible to have the configure script do the search for a
 tclsh as at present, BUT also do a quick sanity check of whether the Tcl
 version is appropriate for the Mac OS version?  If the check fails, exit
 with a message explaining that the installation process needs Tcl
 <major>.<minor> in /usr/bin (or wherever).  Ideally the sanity check could
 also consider architecture, and not try to use a 64-bit Tcl on a 32-bit
 host (or vice versa).

 2. Could there be a way e.g. a config option to specify the Tcl
 interpreter for use during the installation, so that if I know I've got a
 suitable Tcl somewhere on my machine, I can tell the MacPorts installer
 about it?

 I let the new Tcl go into /usr/bin only because that was the default for
 the installer (think I used the package from ActiveState, but couldn't
 swear to it), so I'd guess others will run into this same issue sooner or
 later.

 Again, many thanks for the explanations.

-- 
Ticket URL: <https://trac.macports.org/ticket/43809#comment:3>
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