[MacPorts] #31288: libelf needs '--disable-compat' to fix headers

[MacPorts]

#31288: libelf needs '--disable-compat' to fix headers
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 Reporter:  adfernandes@…             |       Owner:  macports-tickets@…                   
     Type:  defect                    |      Status:  new                                  
 Priority:  Normal                    |   Milestone:                                       
Component:  ports                     |     Version:  2.0.3                                
 Keywords:                            |        Port:  libelf                               
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 In bug #14955, conflicting nlist.h headers were handled by deleting the
 nlist.h used by libelf.

 This is incorrect; both elf and mach-o have an "nlist.h" that are
 incompatible. The system's is at /usr/include/nlist.h for mach-o formatted
 objects.

 Libelf [http://www.mr511.de/software/libelf-0.8.0.README] has a
 "compatibility mode" where the headers are put in
 `${prefix}/usr/include/libelf`, and this is preferred on OS X.

 Patch attached. Okay to commit?

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Ticket URL: <https://trac.macports.org/ticket/31288>
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