From ed1882ef51197d8d824ac50d946a7fff850066a1 Mon Sep 17 00:00:00 2001
From: Henry de Valence <hdevalence@hdevalence.ca>
Date: Mon, 23 Nov 2020 18:32:06 -0800
Subject: [PATCH] seems to fix compilation on M1 Apple Silicon

---
 util/crc32c.cc       | 6 +++---
 util/crc32c_arm64.cc | 4 +++-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/util/crc32c.cc b/util/crc32c.cc
index a709e9b1ce8..65d65c84b3b 100644
--- a/util/crc32c.cc
+++ b/util/crc32c.cc
@@ -470,7 +470,7 @@ static bool isAltiVec() {
 }
 #endif
 
-#if defined(__linux__) && defined(HAVE_ARM64_CRC)
+#if defined(HAVE_ARM64_CRC)
 uint32_t ExtendARMImpl(uint32_t crc, const char *buf, size_t size) {
   return crc32c_arm64(crc, (const unsigned char *)buf, size);
 }
@@ -490,7 +490,7 @@ std::string IsFastCrc32Supported() {
   has_fast_crc = false;
   arch = "PPC";
 #endif
-#elif defined(__linux__) && defined(HAVE_ARM64_CRC)
+#elif defined(HAVE_ARM64_CRC)
   if (crc32c_runtime_check()) {
     has_fast_crc = true;
     arch = "Arm64";
@@ -1222,7 +1222,7 @@ uint32_t crc32c_3way(uint32_t crc, const char* buf, size_t len) {
 static inline Function Choose_Extend() {
 #ifdef HAVE_POWER8
   return isAltiVec() ? ExtendPPCImpl : ExtendImpl<Slow_CRC32>;
-#elif defined(__linux__) && defined(HAVE_ARM64_CRC)
+#elif defined(HAVE_ARM64_CRC)
   if(crc32c_runtime_check()) {
     return ExtendARMImpl;
   } else {
diff --git a/util/crc32c_arm64.cc b/util/crc32c_arm64.cc
index 7df01e6bb2a..809a2a71f43 100644
--- a/util/crc32c_arm64.cc
+++ b/util/crc32c_arm64.cc
@@ -5,9 +5,11 @@
 
 #include "util/crc32c_arm64.h"
 
-#if defined(__linux__) && defined(HAVE_ARM64_CRC)
+#if defined(HAVE_ARM64_CRC)
 
+#if defined(__linux__)
 #include <asm/hwcap.h>
+#endif
 #ifdef ROCKSDB_AUXV_GETAUXVAL_PRESENT
 #include <sys/auxv.h>
 #endif