From 8e71c5f05058bc43c5572547daac11c3ebc54de2 Mon Sep 17 00:00:00 2001
From: Jeremy Koritzinsky <jekoritz@microsoft.com>
Date: Mon, 9 Aug 2021 08:43:14 -0700
Subject: [PATCH] Fix building CoreCLR for x86 with the Windows 10.0.20348.0
 SDK

The SDK now defines CONTEXT_UNWOUND_TO_CALL in more cases, so we get a macro redefinition error. Since the SDK defines it to the same value as we do, just skip our definition if it's already defined.
---
 src/coreclr/inc/crosscomp.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/coreclr/inc/crosscomp.h b/src/coreclr/inc/crosscomp.h
index 0874603640b3b0..358b5d2b668816 100644
--- a/src/coreclr/inc/crosscomp.h
+++ b/src/coreclr/inc/crosscomp.h
@@ -41,7 +41,9 @@
 #define ARM_MAX_BREAKPOINTS     8
 #define ARM_MAX_WATCHPOINTS     1
 
+#ifndef CONTEXT_UNWOUND_TO_CALL
 #define CONTEXT_UNWOUND_TO_CALL 0x20000000
+#endif
 
 #if !defined(HOST_ARM64)
 typedef struct _NEON128 {