[MacPorts] #61495: xorg-libice fails to configure on Big Sur when installing xemacs

[MacPorts]

#61495: xorg-libice fails to configure on Big Sur when installing xemacs
---------------------------+--------------------
  Reporter:  wealthychef1  |      Owner:  (none)
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.6.4
Resolution:  invalid       |   Keywords:
      Port:                |
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Comment (by wealthychef1):

 YES thank you.  Amazing sleuthing job there!  Running the command in your
 linked thread solved the problem.  What a joy.  :-)

 {{{
 root at Richs-iMac (~ ): sudo touch
 /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress
 root at Richs-iMac (~ ): softwareupdate -l
 Software Update Tool

 Finding available software
 Software Update found the following new or updated software:
 * Label: Command Line Tools for Xcode-12.2
         Title: Command Line Tools for Xcode, Version: 12.2, Size: 440907K,
 Recommended: YES,
 * Label: Command Line Tools for Xcode-12.2
         Title: Command Line Tools for Xcode, Version: 12.2, Size: 440907K,
 Recommended: YES,
 }}}

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Ticket URL: <https://trac.macports.org/ticket/61495#comment:2>
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