[MacPorts] #35336: libunwind-headers build fails

[MacPorts]

#35336: libunwind-headers build fails
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 Reporter:  marco.outatime@…          |       Owner:  mfeiri@…           
     Type:  defect                    |      Status:  new                
 Priority:  Normal                    |   Milestone:                     
Component:  ports                     |     Version:  2.1.2              
 Keywords:  mountainlion              |        Port:  libunwind-headers  
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Comment(by ryandesign@…):

 You should ''not'' have to use `sudo` when agreeing to the license
 agreement. If people are finding that that's necessary, then we have a bug
 in MacPorts. However, I can confirm that doing so also fixes the problem
 for me on Mountain Lion.

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Ticket URL: <https://trac.macports.org/ticket/35336#comment:8>
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