PR objc/25965
In gcc/objc/:
       * objc-act.c (objc_get_interface_ivars): New function.
       (objc_collecting_ivars): New variable.
       (continue_class): Set and reset objc_collecting_ivars for context.
In gcc/:
       * c-decl.c (detect_field_duplicates): If compiling Objective-C,
       call objc_get_interface_ivars ().
       * c-family/c-common.h (objc_get_interface_ivars): New declaration.
       * c-family/stub-objc.c (objc_get_interface_ivars): New stub.
In gcc/objcp/:
       * objcp-decl.c (objcp_finish_struct): Call
       objc_get_interface_ivars() and check for duplicate ivars.

In gcc/testsuite/:
       Merge from 'apple/trunk' branch on FSF servers.

       2005-10-11  Fariborz Jahanian <fjahanian@apple.com>

               Radar 4291785

               objc.dg/naming-4.m: New
               objc.dg/naming-5.m: New
               obj-c++.dg/naming-1.mm: New
               obj-c++.dg/naming-2.mm: New

From-SVN: r164491