_SC_XOPEN_VERSION 623 ext/etc/constdefs.h #if !defined(_SC_XOPEN_VERSION) _SC_XOPEN_VERSION 625 ext/etc/constdefs.h # define _SC_XOPEN_VERSION _SC_XOPEN_VERSION _SC_XOPEN_VERSION 1313 ext/etc/constdefs.h #if defined(_SC_XOPEN_VERSION) _SC_XOPEN_VERSION 1314 ext/etc/constdefs.h rb_define_const(mod, "SC_XOPEN_VERSION", INTEGER2NUM(_SC_XOPEN_VERSION));