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Elixir Cross Referencer

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// RUN: %clang_cc1 -fsyntax-only -verify %s
extern const int PR6495a = 42;
extern int PR6495b = 42; // expected-warning{{'extern' variable has an initializer}}
extern const int PR6495c[] = {42,43,44};

extern struct Test1 {}; // expected-warning {{'extern' is not permitted on a declaration of a type}}
extern "C" struct Test0 { int x; }; // no warning