[MacPorts] #60093: gtkglext @1.2.0_11 +quartz does not configure on macOS Catalina, Version 10.15.3, because 'configure: error: X development libraries not found'

[MacPorts]

#60093: gtkglext @1.2.0_11 +quartz does not configure on macOS Catalina, Version
10.15.3, because 'configure: error: X development libraries not found'
------------------------+----------------------
  Reporter:  ballapete  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.6.2
Resolution:             |   Keywords:  catalina
      Port:  gtkglext   |
------------------------+----------------------
Changes (by ballapete):

 * Attachment "config.log" added.

 work/gtkglext-1.2.0/config

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Ticket URL: <https://trac.macports.org/ticket/60093>
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