fix msvc

vendor/mruby-compiler2/mrbgem.rake

@@ -0,0 +1,66 @@
+MRuby::Gem::Specification.new('mruby-compiler2') do |spec|
+  spec.license = 'MIT'
+  spec.author  = 'HASUMI Hitoshi'
+  spec.summary = 'mruby compiler using a universal parser'
+
+  lib_dir = "#{dir}/lib"
+  cc.include_paths << "#{dir}/include"
+
+  prism_dir = "#{lib_dir}/prism"
+  ruby_dir = "#{lib_dir}/ruby"
+
+  cc.defines.flatten!
+
+  cc.defines << "PRISM_XALLOCATOR"
+  if cc.defines.include?("PICORB_VM_MRUBY")
+    cc.defines << "MRC_TARGET_MRUBY"
+  elsif cc.defines.include?("PICORB_VM_MRUBYC")
+    cc.defines << "MRC_TARGET_MRUBYC"
+  end
+
+  if cc.defines.include?("PICORB_INT32")
+    cc.defines << "MRC_INT64"
+  end
+  if cc.defines.any? { _1.match? /\A(PICORUBY|MRB)_DEBUG(=|\z)/ }
+    cc.defines << "MRC_DEBUG"
+    cc.defines << "MRC_DUMP_PRETTY"
+  else
+    cc.defines << "PRISM_BUILD_MINIMAL"
+  end
+
+  prism_templates_dir = "#{lib_dir}/prism/templates"
+  cc.include_paths << "#{prism_dir}/include"
+
+  next if %w(clean deep_clean).include?(Rake.application.top_level_tasks.first)
+
+  directory prism_dir do
+    FileUtils.cd dir do
+      sh "git submodule update --init"
+    end
+  end
+
+  task :prism_templates => prism_dir do
+    FileUtils.cd prism_dir do
+      sh "templates/template.rb"
+    end
+  end
+
+  %w(node prettyprint serialize token_type).each do |name|
+    dst = "#{prism_dir}/src/#{name}.c"
+    # file task does not work when dst does not exist. why?
+    Rake::Task[:prism_templates].invoke unless File.exist?(dst)
+    file dst => ["#{prism_templates_dir}/src/#{name}.c.erb", "#{prism_templates_dir}/template.rb"] do |t|
+      Rake::Task[:prism_templates].invoke
+    end
+  end
+
+  Dir.glob("#{prism_dir}/src/**/*.c").map do |src|
+    obj = objfile(src.pathmap("#{build_dir}/lib/%n"))
+    objs << obj
+    file obj => [src] do |f|
+      cc.run f.name, f.prerequisites.first
+    end
+  end
+
+end
+