[MacPorts] #16403: graphviz @2.20.2 Configure error - build failure

[MacPorts]

#16403: graphviz @2.20.2 Configure error - build failure
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  Reporter:  guaripete at gmail.com  |       Owner:  ryandesign at macports.org
      Type:  defect               |      Status:  new                    
  Priority:  Normal               |   Milestone:  Port Bugs              
 Component:  ports                |     Version:  1.6.0                  
Resolution:                       |    Keywords:                         
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Comment(by ryandesign at macports.org):

 The first error reported in this ticket ("No package 'pangox' found") was
 experienced by the gtkglext port, not the graphviz port.

 What port is the second error ("Package pangocairo was not found in the
 pkg-config search path") being experienced by?

 FYI: pangocairo is a library built by the pango port when the cairo port
 is present. Is anything listed when you type "`port contents pango | grep
 pangocairo`"? Is the cairo port installed and active, and what variants
 are selected? Use "`port installed cairo`" to find out.

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Ticket URL: <http://trac.macports.org/ticket/16403#comment:3>
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