gcc/testsuite/gcc.dg/Wunused-result.c

   1 /* PR c/99972 - missing -Wunused-result on a call to a locally redeclared
   2    warn_unused_result function
   3    { dg-do compile }
   4    { dg-options "-Wall" } */
   5
   6 void gwur_local_local (void)
   7 {
   8   __attribute__ ((warn_unused_result)) int fwur1 (void);
   9
  10   fwur1 ();         // { dg-warning "\\\[-Wunused-result" }
  11 }
  12
  13 void hwur_local_local (void)
  14 {
  15   /* Verify the attribute from the declaration above is copied/merged
  16      into the declaration below.  */
  17   int fwur1 (void);
  18
  19   fwur1 ();          // { dg-warning "\\\[-Wunused-result" }
  20 }
  21
  22
  23 void gwur_local_global (void)
  24 {
  25   __attribute__ ((warn_unused_result)) int fwur2 (void);
  26
  27   fwur2 ();         // { dg-warning "\\\[-Wunused-result" }
  28 }
  29
  30 int fwur2 (void);
  31
  32 void hwur_local_global (void)
  33 {
  34   fwur2 ();         // { dg-warning "\\\[-Wunused-result" }
  35 }
  36
  37
  38 __attribute__ ((warn_unused_result)) int fwur3 (void);
  39
  40 void gwur_global_local (void)
  41 {
  42   fwur3 ();         // { dg-warning "\\\[-Wunused-result" }
  43 }
  44
  45 void hwur_global_local (void)
  46 {
  47   int fwur3 (void);
  48
  49   fwur3 ();         // { dg-warning "\\\[-Wunused-result" }
  50 }