eri_debug_msg
static void eri_debug_msg(const char *, int, struct eri *, debug_msg_t,
eri_debug_msg(__FILE__, __LINE__, (t), (f), (a));
eri_debug_msg(__FILE__, __LINE__, (t), (f), (a), (b));
eri_debug_msg(__FILE__, __LINE__, (t), (f), (a), (b), (c));
eri_debug_msg(__FILE__, __LINE__, (t), (f), (a), (b), (c), (d));
eri_debug_msg(__FILE__, __LINE__, (t), (f), (a), (b), (c), (d), (e));