1 files changed, 37 insertions, 0 deletions
diff --git a/lib/rubygems/ext/rake_builder.rb b/lib/rubygems/ext/rake_builder.rb
new file mode 100644
index 0000000000..d702d7f339
--- /dev/null
+++ b/lib/rubygems/ext/rake_builder.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+#--
+# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
+# All rights reserved.
+# See LICENSE.txt for permissions.
+#++
+
+class Gem::Ext::RakeBuilder < Gem::Ext::Builder
+  def self.build(extension, dest_path, results, args = [], lib_dir = nil, extension_dir = Dir.pwd,
+    target_rbconfig = Gem.target_rbconfig, n_jobs: nil)
+    if target_rbconfig.path
+      warn "--target-rbconfig is not yet supported for Rake extensions. Ignoring"
+    end
+
+    if /mkrf_conf/i.match?(File.basename(extension))
+      run([Gem.ruby, File.basename(extension), *args], results, class_name, extension_dir)
+    end
+
+    rake = ENV["rake"]
+
+    if rake
+      rake = shellsplit(rake)
+    else
+      begin
+        rake = ruby << "-rrubygems" << Gem.bin_path("rake", "rake")
+      rescue Gem::Exception
+        rake = [Gem.default_exec_format % "rake"]
+      end
+    end
+
+    rake_args = ["RUBYARCHDIR=#{dest_path}", "RUBYLIBDIR=#{dest_path}", *args]
+    run(rake + rake_args, results, class_name, extension_dir)
+
+    results
+  end
+end