Rakefile in x25519-0.0.0 vs Rakefile in x25519-0.1.0

@@ -1,11 +1,19 @@
 # frozen_string_literal: true
 
 require "bundler/gem_tasks"
 
+require "rake/clean"
+CLEAN.include("**/*.o", "**/*.so", "**/*.bundle", "pkg", "tmp")
+
+require "rake/extensiontask"
+Rake::ExtensionTask.new("x25519") do |ext|
+  ext.ext_dir = "ext/x25519"
+end
+
 require "rspec/core/rake_task"
 RSpec::Core::RakeTask.new
 
 require "rubocop/rake_task"
 RuboCop::RakeTask.new
 
-task default: %w[spec rubocop]
+task default: %w[compile spec rubocop]