gcc/testsuite/gcc.dg/system-binary-constants-1.c

   1 /*
   2    Origin: Dodji Seketeli <dodji@redhat.com>
   3    { dg-options "-std=iso9899:1999 -pedantic" }
   4    { dg-do compile }
   5  */
   6
   7 #include "system-binary-constants-1.h"
   8
   9 int
  10 foo (void)
  11 {
  12 #if BINARY_INT_CONSTANT_IN_SYSTEM_HEADER /* A binary constant defined
  13                                             in system header.  No
  14                                             warning.  */
  15   return 23;
  16 #endif
  17   return 0b1101; /* { dg-warning "binary constants are a C23 feature or GCC extension" } */
  18 }