From 525aaecbcad68e09aede66f0858ee8a49474213c Mon Sep 17 00:00:00 2001
From: greg7mdp <greg7mdp@gmail.com>
Date: Wed, 6 Apr 2022 15:17:47 -0400
Subject: [PATCH] Fix build issue on M1 macs

---
 src/ripple/shamap/impl/SHAMapInnerNode.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ripple/shamap/impl/SHAMapInnerNode.cpp b/src/ripple/shamap/impl/SHAMapInnerNode.cpp
index c47ac3864..eb00f8587 100644
--- a/src/ripple/shamap/impl/SHAMapInnerNode.cpp
+++ b/src/ripple/shamap/impl/SHAMapInnerNode.cpp
@@ -34,8 +34,10 @@
 #include <iterator>
 #include <utility>
 
+#ifndef __aarch64__
 // This is used for the _mm_pause instruction:
 #include <immintrin.h>
+#endif
 
 namespace ripple {
 
@@ -100,7 +102,9 @@ public:
                 if (try_lock())
                     return;
 
+#ifndef __aarch64__
                 _mm_pause();
+#endif
             }
 
             std::this_thread::yield();