class RbSys::ExtensionTask

def define_native_tasks(for_platform = nil, ruby_ver = RUBY_VERSION, callback = nil)
  cb = proc do |gemspec|
    callback&.call(gemspec)
    @cross_compiling_blocks.each do |block|
      block.call(gemspec)
    end
  end
  super(for_platform, ruby_ver, cb)
end