--- ./sql/current_thd.h.ORIGIN	2019-06-14 17:22:49 -0500
+++ ./sql/current_thd.h	2019-06-14 17:24:07 -0500
@@ -30,7 +30,7 @@
 static inline THD *inline_current_thd(void) { return _current_thd_noinline(); }
 #define current_thd _current_thd_noinline()
 #else
-extern thread_local THD *current_thd;
+extern __thread THD *current_thd;
 #endif
 
 #endif  // CURRENT_THD_INCLUDED