change _ variable in mirb to be enable by default
MODIFY
mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
@@ -406,7 +406,7 @@ ctrl_c_handler(int signo)
}
#endif
-#ifdef ENABLE_MIRB_UNDERSCORE
+#ifndef DISABLE_MIRB_UNDERSCORE
void decl_lv_underscore(mrb_state *mrb, mrbc_context *cxt)
{
struct RProc *proc;
@@ -491,7 +491,7 @@ main(int argc, char **argv)
cxt = mrbc_context_new(mrb);
-#ifdef ENABLE_MIRB_UNDERSCORE
+#ifndef DISABLE_MIRB_UNDERSCORE
decl_lv_underscore(mrb, cxt);
#endif
@@ -667,7 +667,7 @@ main(int argc, char **argv)
result = mrb_any_to_s(mrb, result);
}
p(mrb, result, 1);
-#ifdef ENABLE_MIRB_UNDERSCORE
+#ifndef DISABLE_MIRB_UNDERSCORE
*(mrb->c->stack + 1) = result;
#endif
}

change _ variable in mirb to be enable by default