_SC_XOPEN_UNIX    613 ext/etc/constdefs.h #if !defined(_SC_XOPEN_UNIX)
_SC_XOPEN_UNIX    615 ext/etc/constdefs.h #  define _SC_XOPEN_UNIX _SC_XOPEN_UNIX
_SC_XOPEN_UNIX   1307 ext/etc/constdefs.h #if defined(_SC_XOPEN_UNIX)
_SC_XOPEN_UNIX   1308 ext/etc/constdefs.h     rb_define_const(mod, "SC_XOPEN_UNIX", INTEGER2NUM(_SC_XOPEN_UNIX));