#include <stdio.h> struct big_struct { char a[262144]; }; static const char str[] = "abcdefghijklmnopqrstuvwxyz"; intmain (void){  char *p;  char tmp[100];  int r = 0; #if defined __BOUNDS_CHECKING_ON || defined BC_ON  printf("BOUNDS ON:\n");#else  printf("BOUNDS OFF:\n");#endif   if (r != 0)    __builtin_abort();   r = (__builtin_offsetof(struct big_struct, a) != 0);  printf(" 1:%d", !r);   p = __builtin_memcpy (tmp, str, sizeof(str));  r = (p != tmp);  printf(" 2:%d", !r);   r = __builtin_memcmp (p, str, sizeof(str));  printf(" 3:%d", !r);   p = __builtin_memmove(tmp, str, sizeof(str));  r = (__builtin_memcmp (p, str, sizeof(str)));  printf(" 4:%d", !r);   p = __builtin_memset(tmp, 0, sizeof (tmp));  r = (p != tmp || tmp[0] != 0 || tmp[99] != 0);  printf(" 5:%d", !r);   r = (__builtin_strlen(str) != sizeof(str) - 1);  printf(" 6:%d", !r);   p = __builtin_strcpy(tmp, str);  r = (__builtin_memcmp (p, str, sizeof(str)));  printf(" 7:%d", !r);   p = __builtin_strncpy(tmp, str, sizeof(str));  r = (__builtin_memcmp (p, str, sizeof(str)));  printf(" 8:%d", !r);   r = (__builtin_strcmp (p, str));  printf(" 9:%d", !r);   r = (__builtin_strncmp (p, str, sizeof(str)));  printf(" 10:%d", !r);   tmp[0] = '\0';  p = __builtin_strcat(tmp, str);  r = (__builtin_memcmp (p, str, sizeof(str)));  printf(" 11:%d", !r);   r = (__builtin_strchr(p, 'z') != &p[25]);  printf(" 12:%d", !r);   p = __builtin_strdup (str);  r = (__builtin_memcmp (p, str, sizeof(str)));  printf(" 13:%d", !r);  __builtin_free(p);   p = __builtin_malloc (100);  __builtin_memset(p, 0, 100);  p = __builtin_realloc (p, 1000);  __builtin_memset(p, 0, 1000);  __builtin_free(p);   p = __builtin_calloc(10, 10);  __builtin_memset(p, 0, 100);  __builtin_free(p); #if defined(__i386__) || defined(__x86_64__)  p = __builtin_alloca(100);  __builtin_memset(p, 0, 100);#endif  printf("\n");}