From 6f6039eb7260633b9f8055ea5c3d3b30728c5b4c Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 22 Oct 2021 12:05:24 +0900
Subject: [PATCH] Do not copy platform/version dependent file to independent
 path

---
 Rakefile | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/Rakefile b/Rakefile
index e66a826..ec47e68 100644
--- a/Rakefile
+++ b/Rakefile
@@ -10,7 +10,22 @@ Rake::TestTask.new(:test) do |t|
 end
 
 require 'rake/extensiontask'
-Rake::ExtensionTask.new(name)
+class << Rake::ExtensionTask.new(name)
+  def evil_copy?(src, dest)
+    version = %r[/\d+(?:\.\d+){1,2}/]
+    src.include?(platform) and version =~ src and !(dest.include?(platform) and version =~ dest)
+  end
+
+  def install(src, dest, **)
+    return if evil_copy?(src, dest)
+    super
+  end
+  def cp(src, dest, **)
+    return if evil_copy?(src, dest)
+    super
+  end
+end
+
 task :test => :compile
 
 task :default => :test