# File lib/rake/extensiontask.rb, line 56 def define fail "Extension name must be provided." if @name.nil? define_compile_tasks # only gems with 'ruby' platforms are allowed to define native tasks define_native_tasks if @gem_spec && @gem_spec.platform == 'ruby' # only define cross platform functionality when enabled return unless @cross_compile if cross_platform.is_a?(Array) then cross_platform.each { |platf| define_cross_platform_tasks(platf) } else define_cross_platform_tasks(cross_platform) end end