[MacPorts] #17633: MacPorts port needs to be built from an /opt/local-installed MacPorts

[MacPorts]

#17633: MacPorts port needs to be built from an /opt/local-installed MacPorts
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 Reporter:  blb@…             |       Owner:  macports-tickets@…                   
     Type:  defect            |      Status:  new                                  
 Priority:  Normal            |   Milestone:  MacPorts 1.8.0                       
Component:  base              |     Version:  1.7.0                                
 Keywords:  prefix            |        Port:                                       
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Comment(by jmr@…):

 There were also multiple hardcoded /opt/local references in the preflight
 script, though that's now reduced to one in InstallationCheck.

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Ticket URL: <http://trac.macports.org/ticket/17633#comment:2>
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