_SC_MESSAGE_PASSING  183 ext/etc/constdefs.h #if !defined(_SC_MESSAGE_PASSING)
_SC_MESSAGE_PASSING  185 ext/etc/constdefs.h #  define _SC_MESSAGE_PASSING _SC_MESSAGE_PASSING
_SC_MESSAGE_PASSING 1049 ext/etc/constdefs.h #if defined(_SC_MESSAGE_PASSING)
_SC_MESSAGE_PASSING 1050 ext/etc/constdefs.h     rb_define_const(mod, "SC_MESSAGE_PASSING", INTEGER2NUM(_SC_MESSAGE_PASSING));