Bug #34017614 Add support for Apple M1 to MySQL 5.7 [WL#12928]

Backport d02d37ef9ceceebd6ac3f69dc2a776e87d336764 WL#12928 Add ARM support to MySQL Cluster Note that this uses std::atomic_thread_fence which requires (at least) -std=c++11 We normally build with -std=c++03 for MySQL 5.7, but not on macOS. By not specifying any -std=<standard> we get whatever is default, which is currently gnu++14. Change-Id: I43f54151e04e2e856c774f8014e379905cc38d55

Author: Tor Didriksen

storage/ndb/src/kernel/vm/mt-asm.h

@@ -1,4 +1,4 @@
-/* Copyright (c) 2008, 2021, Oracle and/or its affiliates.
+/* Copyright (c) 2008, 2022, Oracle and/or its affiliates.
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License, version 2.0,
@@ -139,6 +139,21 @@ xcng(volatile unsigned * addr, int val)
  return prev;
 }
 
+#elif defined(__aarch64__)
+#include <atomic>
+#define NDB_HAVE_MB
+#define NDB_HAVE_RMB
+#define NDB_HAVE_WMB
+#define NDB_HAVE_READ_BARRIER_DEPENDS
+//#define NDB_HAVE_XCNG
+
+#define mb() std::atomic_thread_fence(std::memory_order_seq_cst)
+#define rmb() std::atomic_thread_fence(std::memory_order_seq_cst)
+#define wmb() std::atomic_thread_fence(std::memory_order_seq_cst)
+#define read_barrier_depends() do {} while(0)
+
+#define cpu_pause() __asm__ __volatile__ ("yield")
+
 #else
 #define NDB_NO_ASM "Unsupported architecture (gcc)"
 #endif