[MacPorts] #41236: selfupdate to 2.2.1 fails: configure: error: cannot run C compiled programs.

[MacPorts]

#41236: selfupdate to 2.2.1 fails: configure: error: cannot run C compiled
programs.
---------------------+--------------------------------
  Reporter:  paul@…  |      Owner:  macports-tickets@…
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  base    |    Version:  2.2.0
Resolution:          |   Keywords:
      Port:          |
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Comment (by cal@…):

 The `config.log` is in
 `/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/base`.
 Mavericks doesn't support Xcode 4.x, please update your Xcode and install
 the command line tools using `xcode-select --install`.

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Ticket URL: <https://trac.macports.org/ticket/41236#comment:1>
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