migrating MacPorts to High Sierra: "All compilers are either blacklisted or unavailable..."

[Murray Eisenberg]

After upgrading macOS from Sierra (10.12.6) to High Sierra (10.13.1), I updated Xcode to 9.1 and executed

   xcode-select -p

which gave: /Applications/Xcode.app/Contents/Developer
and then:

   xcode-select —install

which installed (via App Store > Updates)  "Command Line Tools (macOS High Sierra version 10.13) for Xcode” Version 9.0.
If I try xcode-select —install again, I see:

   xcode-select: error: command line tools are already installed, use "Software Update" to install updates

I went through the procedure at 

   https://trac.macports.org/wiki/Migration <https://trac.macports.org/wiki/Migration>

to migrate MacPorts.

In step 3, after saving installed ports (substep a) and saving the list of requested ports (substep b), I uninstalled all installed ports (substep c) and cleaned partially-completed builds (substep d).

Now in doing substep e, ending with...

   sudo ./restore_ports.tcl myports.txt

I get warning messages:

  Warning: All compilers are either blacklisted or unavailable; defaulting to first fallback option
  Warning: All compilers are either blacklisted or unavailable; defaulting to first fallback option
  Warning: All compilers are either blacklisted or unavailable; defaulting to first fallback option
  Error: we appear to be stuck, exiting...
  infinite loop
      while executing
  "sort_ports $portList"
      invoked from within
  "set operationList [sort_ports $portList]"
    (file "./restore_ports.tcl" line 285)

I wondered about the fact that Xcode itself is 9.1, whereas the Command Line tools are 9.0, yet.
Is that the cause of the problem? I don’t see how to install any later version of the Xcode Command Line Tools.

---
Murray Eisenberg			murrayeisenberg at gmail.com
503 King Farm Blvd #101	Home (240)-246-7240
Rockville, MD 20850-6667	Mobile (413)-427-5334


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.macports.org/pipermail/macports-users/attachments/20171110/fcbc3c75/attachment.html>