va_copy
va_copy(ap, va);
va_copy(tmp, ap);
va_copy(tmp, ap);
va_copy(tmp, ap);
va_copy(orgap, ap);
#define VA_COPY va_copy
va_copy(eap, sap);
va_copy(cap, ap);
va_copy(cap, ap);
va_copy(cap, ap);
va_copy(ap2, ap);