if RUBY_PLATFORM =~ /darwin/ then

    require 'rbuild-bundle'
    require 'rbuild-cfamily'

    cg_objects = build_objects(:sources => ['Source/coregraphics.c'],
                               :extra_cflags => '-IRuby')
    newton_objects = build_objects(:sources => ['Source/newton.c'],
                                   :extra_cflags => '-IRuby -INewton -D_NEWTON_USE_LIB')

    build_bundle(:bundle_name => 'Ascent.app',
                 :resources_directory => 'Resources')
    
    build(:targets => ['Ascent.app/Contents/MacOS/Ascent'],
          :dependencies => ['../RubyGameCommon/RubyGameCommon'],
          :command => 'cp ../RubyGameCommon/RubyGameCommon Ascent.app/Contents/MacOS/Ascent',
          :message => 'Copying RubyGameCommon Executable')
    
    build(:targets => ['Ascent.app/Contents/Frameworks/OpenAL.framework'],
          :dependencies => ['../RubyGameCommon/External/openal/macosx/build/OpenAL.framework'],
          :command => 'cp -r ../RubyGameCommon/External/openal/macosx/build/OpenAL.framework Ascent.app/Contents/Frameworks/',
          :message => 'Copying OpenAL Framework')
    
    build(:targets => ['Ascent.app/Contents/Resources/Ruby/CoreGraphics.bundle'],
          :dependencies => cg_objects,
          :command => "gcc -undefined dynamic_lookup -bundle #{cg_objects.join(' ')} -framework Cocoa -o Ascent.app/Contents/Resources/Ruby/CoreGraphics.bundle",
          :message => 'Building CoreGraphics Bundle')

    build(:targets => ['Ascent.app/Contents/Resources/Ruby/Newton.bundle'],
          :dependencies => newton_objects,
          :command => "gcc -undefined dynamic_lookup -bundle #{newton_objects.join(' ')} -LNewton -lnewton32 -framework Cocoa -o Ascent.app/Contents/Resources/Ruby/Newton.bundle",
          :message => 'Building Newton Bundle')    

else

    exit(1)

end