Edited a little bit to build shoes.exe on Windows.

Rakefile_for_windows

@@ -0,0 +1,127 @@
+$:.unshift '.'
+
+require 'rubygems'
+require 'rake'
+require 'rake/clean'
+if RUBY_VERSION != '1.8.7'
+require_relative 'platform/skel'
+else
+require File.join(File.dirname(__FILE__), 'platform/skel')
+end
+require 'fileutils'
+require 'find'
+require 'yaml'
+include FileUtils
+
+APP = YAML.load_file(File.join(ENV['APP'] || ".", "app.yaml"))
+APPNAME = APP['name']
+RELEASE_ID, RELEASE_NAME = APP['version'], APP['release']
+NAME = APP['shortname'] || APP['name'].downcase.gsub(/\W+/, '')
+SONAME = 'shoes'
+
+GIT = ENV['GIT'] || "git"
+REVISION = (`#{GIT} rev-list HEAD`.split.length + 1).to_s
+VERS = ENV['VERSION'] || "0.r#{REVISION}"
+PKG = "#{NAME}-#{VERS}"
+APPARGS = APP['run']
+FLAGS = %w[DEBUG VIDEO]
+VLC_VERSION = (RUBY_PLATFORM =~ /win32/ ? "0.8": `vlc --version 2>/dev/null`.split[2])
+VLC_0_8 = VLC_VERSION !~ /^0\.9/
+
+BIN = "*.{bundle,jar,o,so,obj,pdb,pch,res,lib,def,exp,exe,ilk}"
+CLEAN.include ["{bin,shoes}/#{BIN}", "req/**/#{BIN}", "dist"]
+
+RUBY_SO = RbConfig::CONFIG['RUBY_SO_NAME']
+RUBY_V = RbConfig::CONFIG['ruby_version']
+RUBY_LIB_BASE = File.basename(RbConfig::CONFIG['libdir'])
+RUBY_PROGRAM_VERSION = RbConfig::CONFIG['RUBY_PROGRAM_VERSION']
+SHOES_RUBY_ARCH = RbConfig::CONFIG['arch']
+RUBY_1_9 = (RUBY_V =~ /^1\.9/)
+if RUBY_1_9
+  $: << "."
+end
+
+if ENV['APP']
+  %w[dmg icons].each do |subk|
+    APP[subk].keys.each do |name|
+      APP[subk][name] = File.join(ENV['APP'], APP[subk][name])
+    end
+  end
+end
+
+if File.exists? ".git/refs/tags/#{RELEASE_ID}/#{RELEASE_NAME}"
+  abort "** Rename this release (and add to lib/shoes.rb) #{RELEASE_NAME} has already been tagged."
+end
+
+case RUBY_PLATFORM
+when /mingw/
+  require File.expand_path('rakefile_mingw')
+  Builder = MakeMinGW
+when /darwin/
+  require File.expand_path('rakefile_darwin')
+  Builder = MakeDarwin
+when /linux/
+  require File.expand_path('rakefile_linux')
+  Builder = MakeLinux
+else
+  puts "Sorry, your platform [#{RUBY_PLATFORM}] is not supported..."
+end
+
+# --------------------------
+# common platform tasks
+
+desc "Same as `rake build'"
+task :default => [:build]
+
+desc "Does a full compile, with installer"
+task :package => [:build, :installer]
+
+task "shoes/version.h" do |t|
+  File.open(t.name, 'w') do |f|
+    f << %{#define SHOES_RELEASE_ID #{RELEASE_ID}\n#define SHOES_RELEASE_NAME "#{RELEASE_NAME}"\n#define SHOES_REVISION #{REVISION}\n#define SHOES_BUILD_DATE #{Time.now.strftime("%Y%m%d")}\n#define SHOES_PLATFORM "#{RUBY_PLATFORM}"\n}
+  end
+end
+
+task "dist/VERSION.txt" do |t|
+  File.open(t.name, 'w') do |f|
+    f << %{shoes #{RELEASE_NAME.downcase} (0.r#{REVISION}) [#{RUBY_PLATFORM} Ruby#{RUBY_VERSION}]}
+    %w[VIDEO DEBUG].each { |x| f << " +#{x.downcase}" if ENV[x] }
+    f << "\n"
+  end
+end
+
+# shoes is small, if any include changes, go ahead and build from scratch.
+SRC.zip(OBJ).each do |c, o|
+  file o => [c] + Dir["shoes/*.h"]
+end
+
+# --------------------------
+# tasks depending on Builder = MakeLinux|MakeDarwin|MakeMinGW
+
+desc "Does a full compile, for the OS you're running on"
+task :build => [:build_os, "dist/VERSION.txt"] do
+  Builder.common_build
+  Builder.copy_deps_to_dist
+  Builder.copy_files_to_dist
+  Builder.setup_system_resources
+end
+
+task "dist/#{NAME}" => ["dist/lib#{SONAME}.#{DLEXT}", "bin/main.o"] + ADD_DLL do |t|
+  Builder.make_app t.name
+end
+
+task "dist/lib#{SONAME}.#{DLEXT}" => ['shoes/version.h'] + OBJ do |t|
+  Builder.make_so t.name
+end
+
+rule ".o" => ".m" do |t|
+  Builder.cc t
+end
+
+rule ".o" => ".c" do |t|
+  Builder.cc t
+end
+
+task :installer do
+  Builder.make_installer
+end

lib/shoes/encoding.rb

@@ -1,5 +1,5 @@
 # Only needed on windows (encoding.data not installed for linux/darwin)
-if RbConfig::CONFIG['host_os'] =~ /mswin|mingw/
+if RUBY_PLATFORM =~ /mswin|mingw/
   IO.read(File.join DIR, 'encoding.data').
   each_line{|file| require File.join(DIR, 'ruby/lib/i386-mingw32/enc', file.chomp)}
 end

shoes/world.c

@@ -92,7 +92,8 @@ shoes_ruby_embed()
   char**  sysinit_argv = NULL;
   RUBY_INIT_STACK;
 #ifdef SHOES_WIN32
-  ruby_sysinit(0, 0);
+  int sysinit_argc = 0;
+  ruby_sysinit( &sysinit_argc, &sysinit_argv );
 #endif
   ruby_init();
   v = (VALUE)ruby_options(3, argv);