[MacPorts] #34077: gtk-doc fails to configure

[MacPorts]

#34077: gtk-doc fails to configure
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 Reporter:  vloodo@…            |       Owner:  devans@…           
     Type:  defect              |      Status:  new                
 Priority:  Normal              |   Milestone:                     
Component:  ports               |     Version:  2.0.4              
 Keywords:                      |        Port:  gtk-doc            
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Comment(by vloodo@…):

 I installed docbook-xml-4.3 and it solved the problem. Apparently just
 having docbook-xml as a dependency is not enough...

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Ticket URL: <https://trac.macports.org/ticket/34077#comment:2>
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