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nghttp2/third-party/mruby/mrbgems/mruby-compiler/mrbgem.rake

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+MRuby::Gem::Specification.new 'mruby-compiler' do |spec|
+  spec.license = 'MIT'
+  spec.author  = 'mruby developers'
+  spec.summary = 'mruby compiler library'
+
+  lex_def = "#{dir}/core/lex.def"
+  core_objs = Dir.glob("#{dir}/core/*.c").map { |f|
+    next nil if build.cxx_exception_enabled? and f =~ /(codegen).c$/
+    objfile(f.pathmap("#{build_dir}/core/%n"))
+  }.compact
+
+  if build.cxx_exception_enabled?
+    core_objs <<
+      build.compile_as_cxx("#{dir}/core/y.tab.c", "#{build_dir}/core/y.tab.cxx",
+                           objfile("#{build_dir}/y.tab"), ["#{dir}/core"]) <<
+      build.compile_as_cxx("#{dir}/core/codegen.c", "#{build_dir}/core/codegen.cxx")
+  else
+    core_objs << objfile("#{build_dir}/core/y.tab")
+    file objfile("#{build_dir}/core/y.tab") => "#{dir}/core/y.tab.c" do |t|
+      cc.run t.name, t.prerequisites.first, [], ["#{dir}/core"]
+    end
+  end
+
+  # Parser
+  file "#{dir}/core/y.tab.c" => ["#{dir}/core/parse.y", lex_def] do |t|
+    yacc.run t.name, t.prerequisites.first
+    content = File.read(t.name).gsub(/^#line +\d+ +"\K.*$/){$&.relative_path}
+    File.write(t.name, content)
+  end
+
+  # Lexical analyzer
+  file lex_def => "#{dir}/core/keywords" do |t|
+    gperf.run t.name, t.prerequisites.first
+  end
+
+  file build.libmruby_core_static => core_objs
+  build.libmruby << core_objs
+end