Build the extension

Author: nobu

Gemfile

@@ -5,3 +5,4 @@ gemspec
 gem "rake"
 gem "test-unit"
 gem "test-unit-ruby-core"
+gem "ruby-core-tasks", github: "ruby/ruby-core-tasks"

Rakefile

@@ -1,7 +1,12 @@
 require "bundler/gem_tasks"
 require "rake/testtask"
+require "ruby-core/extensiontask"
+
+helper = Bundler::GemHelper.instance
+extask = RubyCore::ExtensionTask.new(helper.gemspec)
 
 Rake::TestTask.new(:test) do |t|
+  t.libs.unshift(*extask.libs)
   t.libs << "test/lib"
   t.ruby_opts << "-rhelper"
   t.test_files = FileList["test/**/test_*.rb"]