From a6a1155a6b824fa5bc5706ec06f1e459c5f278fe Mon Sep 17 00:00:00 2001
From: Sergey Fedorov <vital.had@gmail.com>
Date: Fri, 12 Jan 2024 17:06:27 +0800
Subject: [PATCH] AsyncFdSocket.h: fix for macOS < 11

Fixes: https://github.com/facebook/folly/issues/2099
---
 folly/io/async/fdsock/AsyncFdSocket.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/folly/io/async/fdsock/AsyncFdSocket.h b/folly/io/async/fdsock/AsyncFdSocket.h
index d3d84bb5873..8fbfbd9baad 100644
--- a/folly/io/async/fdsock/AsyncFdSocket.h
+++ b/folly/io/async/fdsock/AsyncFdSocket.h
@@ -19,6 +19,16 @@
 #include <folly/io/async/AsyncSocket.h>
 #include <folly/io/async/fdsock/SocketFds.h>
 
+#ifdef __APPLE__
+#include <AvailabilityMacros.h>
+#if MAC_OS_X_VERSION_MIN_REQUIRED < 110000
+#ifdef __DARWIN_ALIGN32
+#undef __DARWIN_ALIGN32
+#define __DARWIN_ALIGN32(p) ((__darwin_size_t)((__darwin_size_t)(p) + __DARWIN_ALIGNBYTES32) &~ __DARWIN_ALIGNBYTES32)
+#endif
+#endif
+#endif
+
 namespace folly {
 
 // Including `gtest/gtest_prod.h` would make gtest/gmock a hard dep