gcc/testsuite/gcc.dg/redecl-2.c

   1 /* Test for multiple declarations of an identifier at same block
   2    scope: only valid case is all extern.  */
   3 /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
   4 /* { dg-do compile } */
   5 /* { dg-options "" } */
   6
   7 void
   8 fa0 (void)
   9 {
  10   int a0; /* { dg-message "note: previous declaration" } */
  11   int a0; /* { dg-error "redeclaration" } */
  12 }
  13
  14 void
  15 fa1 (void)
  16 {
  17   int a1; /* { dg-message "note: previous declaration" } */
  18   static int a1; /* { dg-error "redeclaration" } */
  19 }
  20
  21 void
  22 fa2 (void)
  23 {
  24   int a2; /* { dg-message "note: previous declaration" } */
  25   extern int a2; /* { dg-error "follows declaration with no linkage" } */
  26 }
  27
  28 void
  29 fa3 (void)
  30 {
  31   static int a3; /* { dg-message "note: previous declaration" } */
  32   int a3; /* { dg-error "redeclaration" } */
  33 }
  34
  35 void
  36 fa4 (void)
  37 {
  38   static int a4; /* { dg-message "note: previous declaration" } */
  39   static int a4; /* { dg-error "redeclaration" } */
  40 }
  41
  42 void
  43 fa5 (void)
  44 {
  45   static int a5; /* { dg-message "note: previous declaration" } */
  46   extern int a5; /* { dg-error "follows declaration with no linkage" } */
  47 }
  48
  49 void
  50 fa6 (void)
  51 {
  52   extern int a6; /* { dg-message "note: previous declaration" } */
  53   int a6; /* { dg-error "follows extern declaration" } */
  54 }
  55
  56 void
  57 fa7 (void)
  58 {
  59   extern int a7; /* { dg-message "note: previous declaration" } */
  60   static int a7; /* { dg-error "follows extern declaration" } */
  61 }
  62
  63 void
  64 fa8 (void)
  65 {
  66   extern int a8;
  67   extern int a8;
  68 }