From 6c8601ce5ac63cf6b6b2231f45653177ccff29b0 Mon Sep 17 00:00:00 2001
From: "Timothy M. Schaeffer" <Tim.Schaeffer@Crown.com>
Date: Sun, 23 Apr 2023 20:15:25 -0400
Subject: Fix #3680: While building xmake: PROCESSOR_ARCHITECTURE_ARM64 not
 defined.

Using Microsoft Visual Studio 14.0, I got this error when trying to
build xmake from source:

```
src\xmake\engine.c(938): error C2065: 'PROCESSOR_ARCHITECTURE_ARM64': undeclared identifier
```
---
 core/src/xmake/engine.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/src/xmake/engine.c b/core/src/xmake/engine.c
index 8baac18c6..a68de8c12 100644
--- a/core/src/xmake/engine.c
+++ b/core/src/xmake/engine.c
@@ -935,9 +935,11 @@ static tb_void_t xm_engine_init_arch(xm_engine_t* engine)
     case PROCESSOR_ARCHITECTURE_AMD64:
         sysarch = "x64";
         break;
+#if defined(PROCESSOR_ARCHITECTURE_ARM64)
     case PROCESSOR_ARCHITECTURE_ARM64:
         sysarch = "arm64";
         break;
+#endif
     case PROCESSOR_ARCHITECTURE_ARM:
         sysarch = "arm";
         break;
-- 
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