#define CV __perl_CV
/* beginning of include XSUB.h */
struct cv {
        int i;
};
typedef struct cv CV;
#define XSPROTO(name) CV name
/* end of include XSUB.h */
#undef XSPROTO
#define XSPROTO(name) __perl_CV name
#undef CV

struct CV {
        char c;
};

XSPROTO(x);

int main()
{
        struct CV y;
        x.i = 0;
        y.c = '!';
        return 0;
}