[MacPorts] #29737: mesa upgrade fails due to "missing" libxml2

[MacPorts]

#29737: mesa upgrade fails due to "missing" libxml2
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 Reporter:  aeronova@…          |       Owner:  jeremyhu@…           
     Type:  update              |      Status:  assigned             
 Priority:  Normal              |   Milestone:                       
Component:  ports               |     Version:  1.9.2                
 Keywords:                      |        Port:  mesa                 
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Comment(by jeremyhu@…):

 Rather than everyone "me too"ing, could someone please answer Ryan's
 question above about which python you have installed and selected.  Run
 the following:

 {{{
 port installed | grep libxml2
 port select python
 }}}

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Ticket URL: <https://trac.macports.org/ticket/29737#comment:10>
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