[MacPorts] #42470: gtk-doc configure failure

[MacPorts]

#42470: gtk-doc configure failure
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  Reporter:  dluke@…  |      Owner:  devans@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.2.1
Resolution:           |   Keywords:
      Port:  gtk-doc  |
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Comment (by dluke@…):

 I assumed this was a missing dependency on docbook-xml-4.3, but it was
 installed (as a dependency of docbook-xml):

 % port installed docbook-xml-4.3
 The following ports are currently installed:
   docbook-xml-4.3 @5.0_1 (active)

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Ticket URL: <https://trac.macports.org/ticket/42470#comment:1>
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