https://git.ruby-lang.org/ruby.git/commit/?id=b343d54792

From b343d547923cf29456910b20fcd1c0a58ed68176 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Thu, 24 Dec 2020 16:16:20 +0900
Subject: Use RBIMPL_COMPILER_{SINCE,BEFORE} for MSVC

Pointed out by @shyouhei.

NOTE: Already we have dropped the support for older MSVCs,
probably prior to 1300 or 1400.  Remove the conditional code,
especially in win32/Makefile.sub.

diff --git a/include/ruby/atomic.h b/include/ruby/atomic.h
index 39006bc..a898c30 100644
--- a/include/ruby/atomic.h
+++ b/include/ruby/atomic.h
@@ -36,7 +36,7 @@ typedef unsigned int rb_atomic_t; /* Anything OK */ https://github.com/ruby/ruby/blob/trunk/include/ruby/atomic.h#L36
 # define RUBY_ATOMIC_GENERIC_MACRO 1
 
 #elif defined _WIN32
-#if MSC_VERSION_SINCE(1300)
+#if RBIMPL_COMPILER_SINCE(MSVC, 13, 0, 0)
 #pragma intrinsic(_InterlockedOr)
 #endif
 typedef LONG rb_atomic_t;
@@ -48,7 +48,7 @@ typedef LONG rb_atomic_t; https://github.com/ruby/ruby/blob/trunk/include/ruby/atomic.h#L48
 # define RUBY_ATOMIC_FETCH_SUB(var, val) InterlockedExchangeAdd(&(var), -(LONG)(val))
 #if defined __GNUC__
 # define RUBY_ATOMIC_OR(var, val) __asm__("lock\n\t" "orl\t%1, %0" : "=m"(var) : "Ir"(val))
-#elif MSC_VERSION_BEFORE(1300)
+#elif RBIMPL_COMPILER_BEFORE(MSVC, 13, 0, 0)
 # define RUBY_ATOMIC_OR(var, val) rb_w32_atomic_or(&(var), (val))
 static inline void
 rb_w32_atomic_or(volatile rb_atomic_t *var, rb_atomic_t val)
@@ -66,7 +66,7 @@ rb_w32_atomic_or(volatile rb_atomic_t *var, rb_atomic_t val) https://github.com/ruby/ruby/blob/trunk/include/ruby/atomic.h#L66
 #endif
 # define RUBY_ATOMIC_EXCHANGE(var, val) InterlockedExchange(&(var), (val))
 # define RUBY_ATOMIC_CAS(var, oldval, newval) InterlockedCompareExchange(&(var), (newval), (oldval))
-# if MSC_VERSION_BEFORE(1300)
+# if RBIMPL_COMPILER_BEFORE(MSVC, 13, 0, 0)
 static inline rb_atomic_t
 rb_w32_atomic_cas(volatile rb_atomic_t *var, rb_atomic_t oldval, rb_atomic_t newval)
 {
-- 
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