_SC_XOPEN_SHM     603 ext/etc/constdefs.h #if !defined(_SC_XOPEN_SHM)
_SC_XOPEN_SHM     605 ext/etc/constdefs.h #  define _SC_XOPEN_SHM _SC_XOPEN_SHM
_SC_XOPEN_SHM    1301 ext/etc/constdefs.h #if defined(_SC_XOPEN_SHM)
_SC_XOPEN_SHM    1302 ext/etc/constdefs.h     rb_define_const(mod, "SC_XOPEN_SHM", INTEGER2NUM(_SC_XOPEN_SHM));