Get rid of redefinition of `rb_execution_context_t`

Regardless of the order to include "vm_core.h" and "builtin.h".

1 files changed, 2 insertions, 1 deletions

diff --git a/builtin.h b/builtin.h
index f4d485e08d..ce02720e32 100644
--- a/builtin.h
+++ b/builtin.h
@@ -22,8 +22,9 @@ struct rb_builtin_function {
 
 void rb_load_with_builtin_functions(const char *feature_name, const struct rb_builtin_function *table);
 
-#ifndef VM_CORE_H_EC_DEFINED
+#ifndef rb_execution_context_t
 typedef struct rb_execution_context_struct rb_execution_context_t;
+#define rb_execution_context_t rb_execution_context_t
 #endif
 
 /* The following code is generated by the following Ruby script: