[MacPorts] #26878: missing dependency for libarchive

[MacPorts]

#26878: missing dependency for libarchive
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 Reporter:  emanuele.giaquinta@…          |       Owner:  macports-tickets@…                   
     Type:  defect                        |      Status:  new                                  
 Priority:  Normal                        |   Milestone:                                       
Component:  ports                         |     Version:  1.9.1                                
 Keywords:                                |        Port:  libarchive                           
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 libarchive depends on libxml2 (or expat) for xar support. Because mac os x
 provides libxml2, if the libxml2 port is not installed libarchive will be
 linked to the system libxml2.

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Ticket URL: <https://trac.macports.org/ticket/26878>
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