https://git.ruby-lang.org/ruby.git/commit/?id=44cff500a0

From 44cff500a0ad565952e84935bc98523c36a91b06 Mon Sep 17 00:00:00 2001
From: xtkoba <69125751+xtkoba@u...>
Date: Wed, 5 May 2021 07:45:23 +0900
Subject: `_MSC_VER` may not be defined

---
 win32/win32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/win32/win32.c b/win32/win32.c
index 940a85a..d358fc3 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -42,7 +42,7 @@ https://github.com/ruby/ruby/blob/trunk/win32/win32.c#L42
 #include <shlobj.h>
 #include <mbstring.h>
 #include <shlwapi.h>
-#if _MSC_VER >= 1400
+#if defined _MSC_VER && _MSC_VER >= 1400
 #include <crtdbg.h>
 #include <rtcapi.h>
 #endif
-- 
cgit v1.1


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