rb_define_readonly_boolean 1807 ruby.c             rb_define_readonly_boolean("$-p", opt.do_print);
rb_define_readonly_boolean 1808 ruby.c             rb_define_readonly_boolean("$-l", opt.do_line);
rb_define_readonly_boolean 1809 ruby.c             rb_define_readonly_boolean("$-a", opt.do_split);