[MacPorts] #55603: gmp @6.1.2: port install stuck on configure

[MacPorts]

#55603: gmp @6.1.2: port install stuck on configure
---------------------+---------------------------------
  Reporter:  roncli  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  gmp     |
---------------------+---------------------------------

Comment (by roncli):

 OK I finally found the issue:

 {{{
 roncli at DownwardSpiral:~$ sudo xcodebuild -license check
 roncli at DownwardSpiral:~$ sudo -u 'macports' xcodebuild -license check
 xcodebuild: error: couldn't create cache file
 '/var/folders/zy/phns8z2x63xcllcs35bfxrpc0000gp/T/xcrun_db-S1k9spLw'
 (errno=Permission denied)
 ^C
 roncli at DownwardSpiral:~$
 }}}

 The first silently succeeds.  The second throws an error and hangs.  This
 was found by going through ps axu.  After playing around, I came up with
 the above reproducible error in the terminal.

 Now I know the problem, and probably isn't actually with gmp.  However,
 the solution eludes me.  Any ideas?

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Ticket URL: <https://trac.macports.org/ticket/55603#comment:13>
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