Rakefile in dep-selector-libgecode-1.3.0 vs Rakefile in dep-selector-libgecode-1.3.1

@@ -7,22 +7,36 @@
 Gem::PackageTask.new(gemspec) do |pkg|
   pkg.need_zip = true
   pkg.need_tar = true
 end
 
-task :compile do
-  cd "ext/libgecode3"
-  ruby "extconf.rb"
+task :compile => ['gem'] do
+  Dir.chdir "pkg/dep-selector-libgecode-#{gemspec.version}/ext/libgecode3" do
+    ruby "extconf.rb"
+  end
 end
 
 task :clean do
   sh "git clean -fdx"
 end
 
-require "github_changelog_generator/task"
+begin
+  require "github_changelog_generator/task"
 
-GitHubChangelogGenerator::RakeTask.new :changelog do |config|
-  config.future_release = DepSelectorLibgecode::VERSION
-  config.enhancement_labels = "enhancement,Enhancement,New Feature".split(",")
-  config.bug_labels = "bug,Bug,Improvement,Upstream Bug".split(",")
-  config.exclude_labels = "duplicate,question,invalid,wontfix,no_changelog,Exclude From Changelog,Question".split(",")
+  GitHubChangelogGenerator::RakeTask.new :changelog do |config|
+    config.future_release = DepSelectorLibgecode::VERSION
+    config.enhancement_labels = "enhancement,Enhancement,New Feature".split(",")
+    config.bug_labels = "bug,Bug,Improvement,Upstream Bug".split(",")
+    config.exclude_labels = "duplicate,question,invalid,wontfix,no_changelog,Exclude From Changelog,Question".split(",")
+  end
+rescue LoadError
+  # dont care
+end
+
+task :native => ['compile'] do
+  cp_r "pkg/dep-selector-libgecode-#{gemspec.version}/lib/dep-selector-libgecode/vendored-gecode", "lib/dep-selector-libgecode/"
+  gemspec.files += Dir['lib/dep-selector-libgecode/vendored-gecode/**/*']
+  gemspec.platform = Gem::Platform.new(RUBY_PLATFORM)
+  gemspec.extensions = []
+  gem = Gem::Package.build(gemspec)
+  mv gem, "pkg/dep-selector-libgecode-#{gemspec.version}-#{gemspec.platform.to_s}.gem"
 end