#define ONLRET 0000040
#define OFILL 0000100
#define OFDEL 0000200
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) || defined(_XOPEN_SOURCE)
#define NLDLY 0000400
#define NL0 0000000
#define NL1 0000400
#define FFDLY 0100000
#define FF0 0000000
#define FF1 0100000
+#endif
#define VTDLY 0040000
#define VT0 0000000