_SC_XOPEN_REALTIME_THREADS  598 ext/etc/constdefs.h #if !defined(_SC_XOPEN_REALTIME_THREADS)
_SC_XOPEN_REALTIME_THREADS  600 ext/etc/constdefs.h #  define _SC_XOPEN_REALTIME_THREADS _SC_XOPEN_REALTIME_THREADS
_SC_XOPEN_REALTIME_THREADS 1298 ext/etc/constdefs.h #if defined(_SC_XOPEN_REALTIME_THREADS)
_SC_XOPEN_REALTIME_THREADS 1299 ext/etc/constdefs.h     rb_define_const(mod, "SC_XOPEN_REALTIME_THREADS", INTEGER2NUM(_SC_XOPEN_REALTIME_THREADS));