Ok, tks, I just got it. I redefined the msg_Dbg like this: #define msg_Dbg( p_this, ... ) \ do{\ msg_Generic( VLC_OBJECT(p_this), VLC_MSG_DBG, \ MODULE_STRING, __VA_ARGS__ ); \ fprintf(stderr, "file:%s func:%s line:%d \n", __FILE__, __func__, __LINE__); \ }while(0) Then I got everything I ...