From 67669ab425b52a2b6be3d2f3b3b7e3939b676a2c Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Sun, 27 Jun 2021 10:17:27 +0300
Subject: [PATCH] build: Fix Boost Process compatibility with mingw-w64
 compiler

Boost 1.71 has a broken compatibility with mingw-w64 compiler due to the
added __kernel_entry SAL annotations.
---
 src/test/system_tests.cpp | 5 +++++
 src/util/system.cpp       | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/src/test/system_tests.cpp b/src/test/system_tests.cpp
index 940145b84fb..e97eab2c00f 100644
--- a/src/test/system_tests.cpp
+++ b/src/test/system_tests.cpp
@@ -7,6 +7,11 @@
 #include <univalue.h>
 
 #ifdef ENABLE_EXTERNAL_SIGNER
+#if defined(WIN32) && !defined(__kernel_entry)
+// A workaround for boost 1.71 incompatibility with mingw-w64 compiler.
+// For details see https://github.com/bitcoin/bitcoin/pull/22348.
+#define __kernel_entry
+#endif
 #include <boost/process.hpp>
 #endif // ENABLE_EXTERNAL_SIGNER
 
diff --git a/src/util/system.cpp b/src/util/system.cpp
index ee7a76be292..258ba2f2355 100644
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -6,6 +6,11 @@
 #include <util/system.h>
 
 #ifdef ENABLE_EXTERNAL_SIGNER
+#if defined(WIN32) && !defined(__kernel_entry)
+// A workaround for boost 1.71 incompatibility with mingw-w64 compiler.
+// For details see https://github.com/bitcoin/bitcoin/pull/22348.
+#define __kernel_entry
+#endif
 #include <boost/process.hpp>
 #endif // ENABLE_EXTERNAL_SIGNER