[MacPorts] #21856: rb-cocoa build fails

[MacPorts]

#21856: rb-cocoa build fails
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  Reporter:  jwhowse4@…            |       Owner:  kimuraw@…           
      Type:  defect                |      Status:  closed              
  Priority:  Normal                |   Milestone:                      
 Component:  ports                 |     Version:  1.8.1               
Resolution:  fixed                 |    Keywords:                      
      Port:  rb-cocoa              |  
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Comment(by jwhowse4@…):

 The variable build_arch is not specified at all in macports.conf on my
 machine.  It is not set to blank.

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Ticket URL: <http://trac.macports.org/ticket/21856#comment:5>
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