_SC_2_VERSION     498 ext/etc/constdefs.h #if !defined(_SC_2_VERSION)
_SC_2_VERSION     500 ext/etc/constdefs.h #  define _SC_2_VERSION _SC_2_VERSION
_SC_2_VERSION    1238 ext/etc/constdefs.h #if defined(_SC_2_VERSION)
_SC_2_VERSION    1239 ext/etc/constdefs.h     rb_define_const(mod, "SC_2_VERSION", INTEGER2NUM(_SC_2_VERSION));