10 extern void wl_init(int *argcp,char **argv,const char *class);
11 extern void wl_line(long x,long y);
12 extern void wl_done(void);
14 #define iofail() do { perror(pname); exit(EXIT_FAILURE); } while (0)
15 #define iofailn(e) do { errno=(e); perror(pname); exit(EXIT_FAILURE); } while (0)