class Gem::Ext::CmakeBuilder

def self.build(extension, dest_path, results, args=[], lib_dir=nil, cmake_dir=Dir.pwd)
  unless File.exist?(File.join(cmake_dir, 'Makefile'))
    require_relative '../command'
    cmd = ["cmake", ".", "-DCMAKE_INSTALL_PREFIX=#{dest_path}", *Gem::Command.build_args]
    run cmd, results, class_name, cmake_dir
  end
  make dest_path, results, cmake_dir
  results
end