[MacPorts] #35150: libunwind-headers: build fails with Xcode 4.4

[MacPorts]

#35150: libunwind-headers: build fails with Xcode 4.4
------------------------------+---------------------------------------------
 Reporter:  k.krauter@…       |       Owner:  mfeiri@…           
     Type:  defect            |      Status:  new                
 Priority:  Normal            |   Milestone:                     
Component:  ports             |     Version:  2.1.1              
 Keywords:                    |        Port:  libunwind-headers  
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Comment(by k.krauter@…):

 Replying to [comment:7 kankuma@…]:
 > 1.Xcode 4.4 installed.
 > 2.Xcode 4.4 Command Line Tools installed.
 > 3.Terminal open.
 >
 > 4.sudo xcodebuild -license [=>'space'=>'space'...]
 > 5.By typing 'agree' you are agreeing to the terms of the software
 license agreements. Type 'print' to print them or anything else to cancel,
 [agree, print, cancel]
 > 6.[=>agree<enter-key>]
 > 7.You can view the license agreements in Xcode's About Box, or at
 /Applications/Xcode44-DP7.app/Contents/Resources/English.lproj/License.rtf
 >
 > 8.sudo xcode-select -switch
 /Applications/Xcode44-DP7.app/Contents/Developer
 > 9.sudo port upgrade outdated
 >
 > Not Error:libunwind-headers

 thank you very much, I have totally forgot the agreements.
 after I applied the patch above and agree the license => "port update
 outdated" runs without errors!
 thanks again.

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Ticket URL: <https://trac.macports.org/ticket/35150#comment:8>
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