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      1 // RUN: %clang_cc1 -fsyntax-only -verify %s
      2 
      3 int outer1; // expected-note{{previous definition is here}}
      4 extern int outer2; // expected-note{{previous definition is here}}
      5 int outer4;
      6 int outer4; // expected-note{{previous definition is here}}
      7 int outer5;
      8 int outer6(float); // expected-note{{previous definition is here}}
      9 int outer7(float);
     10 
     11 void outer_test() {
     12   extern float outer1; // expected-error{{redefinition of 'outer1' with a different type}}
     13   extern float outer2; // expected-error{{redefinition of 'outer2' with a different type}}
     14   extern float outer3; // expected-note{{previous definition is here}}
     15   double outer4;
     16   extern int outer5; // expected-note{{previous definition is here}}
     17   extern int outer6; // expected-error{{redefinition of 'outer6' as different kind of symbol}}
     18   int outer7;
     19   extern int outer8; // expected-note{{previous definition is here}}
     20   extern int outer9;
     21   {
     22     extern int outer9; // expected-note{{previous definition is here}}
     23   }
     24 }
     25 
     26 int outer3; // expected-error{{redefinition of 'outer3' with a different type}}
     27 float outer4; // expected-error{{redefinition of 'outer4' with a different type}}
     28 float outer5;  // expected-error{{redefinition of 'outer5' with a different type}}
     29 int outer8(int); // expected-error{{redefinition of 'outer8' as different kind of symbol}}
     30 float outer9; // expected-error{{redefinition of 'outer9' with a different type}}
     31 
     32 extern int outer13; // expected-note{{previous definition is here}}
     33 void outer_shadowing_test() {
     34   extern int outer10;
     35   extern int outer11; // expected-note{{previous definition is here}}
     36   extern int outer12; // expected-note{{previous definition is here}}
     37   {
     38     float outer10;
     39     float outer11;
     40     float outer12;
     41     {
     42       extern int outer10; // okay
     43       extern float outer11; // expected-error{{redefinition of 'outer11' with a different type}}
     44       static double outer12;
     45       {
     46         extern float outer12; // expected-error{{redefinition of 'outer12' with a different type}}
     47         extern float outer13; // expected-error{{redefinition of 'outer13' with a different type}}
     48       }
     49     }
     50   }
     51 }
     52 
     53 void g18(void) { // expected-note{{'g18' declared here}}
     54   extern int g19;
     55 }
     56 int *p=&g19; // expected-error{{use of undeclared identifier 'g19'}} \
     57              // expected-warning{{incompatible pointer types}}
     58 
     59 // PR3645
     60 static int a;
     61 extern int a; // expected-note {{previous definition is here}}
     62 int a;	// expected-error {{non-static declaration of 'a' follows static declaration}}
     63