Enable building the C extension on TruffleRuby.

Author: aardvark179

Rakefile

@@ -11,7 +11,7 @@ Rake::TestTask.new(:test) do |t|
  t.test_files = FileList["test/**/test_*.rb"]
 end
 
-if RUBY_ENGINE == "ruby"
+if RUBY_ENGINE == "ruby" || RUBY_ENGINE == "truffleruby"
  require 'rake/extensiontask'
  Rake::ExtensionTask.new(name)
  task :test => :compile

ext/io/console/extconf.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: false
 require 'mkmf'
 
-ok = true if RUBY_ENGINE == "ruby"
+ok = true if RUBY_ENGINE == "ruby" || RUBY_ENGINE == "truffleruby"
 hdr = nil
 case
 when macro_defined?("_WIN32", "")

lib/io/console.rb

@@ -1,4 +1,4 @@
-if RUBY_ENGINE == 'ruby'
+if RUBY_ENGINE == 'ruby' || RUBY_ENGINE == 'truffleruby'
  require_relative 'console.so'
 else
  require_relative 'console/ffi/console'