[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 guaripete at gmail.com):

 Replying to [comment:3 ryandesign@…]:
 > 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?
 Second error pop when
 {{{
 --->  Configuring gtkglext
 }}}

 > 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`"?
 No results returned by grep.
 [[BR]]

 > Is the cairo port installed and active, and what variants are selected?
 Use "`port installed cairo`" to find out.
 cairo @1.6.4_1+macosx (active)

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Ticket URL: <http://trac.macports.org/ticket/16403#comment:4>
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