gcc/testsuite/gcc.dg/cpp/warn-redefined.c

   1 // { dg-do preprocess }
   2 // { dg-options "-std=gnu99 -fdiagnostics-show-option -Wbuiltin-macro-redefined" }
   3
   4 #ifndef __TIME__
   5 #error "__TIME__ builtin is not defined"
   6 // { dg-bogus "__TIME__ builtin is not defined" "no-time" { target *-*-* } .-1 }
   7 #endif
   8
   9 #define __TIME__ "X"  // { dg-warning "-:\"__TIME__\" redefined .-Wbuiltin-macro-redefined." }
  10
  11 #define __TIME__ "Y"  // { dg-bogus "-Wbuiltin-macro-redefined" }
  12                       // { dg-warning "-:\"__TIME__\" redefined" "not-builtin-1" { target *-*-* } .-1 }
  13                       // { dg-message "-:previous definition" "previous-1" { target *-*-* } 9 }
  14
  15 #define X "X"
  16 #define X "Y"         // { dg-bogus "-Wbuiltin-macro-redefined" }
  17                       // { dg-warning "-:\"X\" redefined" "not-builtin-2" { target *-*-* } .-1 }
  18                       // { dg-message "-:previous definition" "previous-2" { target *-*-* } 15 }