LPT_VPRINTF
LPT_VPRINTF(("%s(%s): initializing printer.\n", __func__,
LPT_VPRINTF(("%s(%s): printer ready.\n", __func__,
LPT_VPRINTF(("%s(%s): writing %zu bytes\n", __func__,
LPT_VPRINTF(("%s(%s): transfer finished, error %d.\n", __func__,
#ifndef LPT_VPRINTF