[MacPorts] #28839: perl5.12 won't compile with Xcode 4

[MacPorts]

#28839: perl5.12 won't compile with Xcode 4
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 Reporter:  christopher.hearn@…          |       Owner:  ricci@…           
     Type:  defect                       |      Status:  new               
 Priority:  Normal                       |   Milestone:                    
Component:  ports                        |     Version:  1.9.2             
 Keywords:  xcode4                       |        Port:  perl5.12          
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Comment(by jmr@…):

 Does Xcode 4 really modify libSystem (or the libc symlink)? The failing
 check for the C library is grepping for fprintf in the contents of libc,
 and it's definitely there on my 10.6 system.

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Ticket URL: <https://trac.macports.org/ticket/28839#comment:8>
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