#include <ccan/str/str.h>
struct s {
int val;
};
int main(int argc, char *argv[])
{
struct s
#ifdef FAIL
#if !HAVE_TYPEOF
#error We need typeof to check STR_MAX_CHARS.
#endif
#else
/* A pointer is OK. */
*
#endif
val;
char str[STR_MAX_CHARS(val)];
str[0] = '\0';
return str[0] ? 0 : 1;
}