From e1adb6cb15129a54df0c55a337e98b92b2a55e3f Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Mon, 26 May 2025 20:11:41 +0900
Subject: [PATCH] Win: Suppress false warnings from Visual C 17.14.1

https://developercommunity.visualstudio.com/t/warning-C5287:-operands-are-different-e/10877942?

It is not able to silence "operands are different enum types"
warnings, even using an explicit cast, as the message says.
---
 win32/Makefile.sub | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index 80225c3063..7c125a4a02 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -286,6 +286,10 @@ WARNFLAGS = -W2 -wd4100 -wd4127 -wd4210 -wd4214 -wd4255 -wd4574 \
 !else
 WARNFLAGS = -W2
 !endif
+!if $(MSC_VER) >= 1944
+# https://developercommunity.visualstudio.com/t/warning-C5287:-operands-are-different-e/10877942
+WARNFLAGS = $(WARNFLAGS) -wd5287
+!endif
 !endif
 WERRORFLAG = -WX
 !if !defined(CFLAGS_NO_ARCH)