_SC_SHELL         238 ext/etc/constdefs.h #if !defined(_SC_SHELL)
_SC_SHELL         240 ext/etc/constdefs.h #  define _SC_SHELL _SC_SHELL
_SC_SHELL        1082 ext/etc/constdefs.h #if defined(_SC_SHELL)
_SC_SHELL        1083 ext/etc/constdefs.h     rb_define_const(mod, "SC_SHELL", INTEGER2NUM(_SC_SHELL));