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

[MacPorts]

#35150: libunwind-headers: build fails with Xcode 4.4
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 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:2 dnedrow@…]:
 > Knowing that Xcode 4.4 and 4.5 are not yet supported…
 >
 > 4.4 and 4.5 no longer include the Headers directory under
 Xcode.app/Contents/Developer. Looks like these headers were for building
 legacy carbon apps, which are no longer supported.
 >
 > Patch file attached should anyone want to apply it.

 thank you for this patch, that i have applied.
 the problem still persists, same error.

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Ticket URL: <https://trac.macports.org/ticket/35150#comment:4>
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