_SC_XOPEN_UUCP    618 ext/etc/constdefs.h #if !defined(_SC_XOPEN_UUCP)
_SC_XOPEN_UUCP    620 ext/etc/constdefs.h #  define _SC_XOPEN_UUCP _SC_XOPEN_UUCP
_SC_XOPEN_UUCP   1310 ext/etc/constdefs.h #if defined(_SC_XOPEN_UUCP)
_SC_XOPEN_UUCP   1311 ext/etc/constdefs.h     rb_define_const(mod, "SC_XOPEN_UUCP", INTEGER2NUM(_SC_XOPEN_UUCP));