Use ruby-core-tasks gem

Author: nobu

.gitignore

@@ -10,3 +10,4 @@
 *.bundle
 *.so
 *.dll
+/.build/

Gemfile

@@ -6,4 +6,4 @@ gem "bundler"
 gem "test-unit"
 gem "test-unit-ruby-core"
 gem "rake"
-gem "rake-compiler"
+gem "ruby-core-tasks", github: "ruby/ruby-core-tasks"

Rakefile

@@ -1,5 +1,6 @@
 require "bundler/gem_tasks"
 require "rake/testtask"
+require "ruby-core/extensiontask"
 
 if RUBY_PLATFORM.include?("s390x")
   # Avoid possible test failures with the zlib applying the following patch on
@@ -8,14 +9,14 @@ if RUBY_PLATFORM.include?("s390x")
   ENV["DFLTCC"] = "0"
 end
 
+extask = RubyCore::ExtensionTask.new(Bundler::GemHelper.instance.gemspec)
+
 desc "Run tests"
 Rake::TestTask.new do |t|
   t.libs << "test/lib"
+  t.libs.concat(extask.libs)
   t.ruby_opts << "-rhelper"
   t.test_files = FileList["test/**/test_*.rb"]
 end
 
-require 'rake/extensiontask'
-Rake::ExtensionTask.new("zlib")
-
 task :default => [:compile, :test]

rakelib/epoch.rake

@@ -0,0 +1 @@
+require 'ruby-core/epoch'