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'))
    cmd = "cmake . -DCMAKE_INSTALL_PREFIX=#{dest_path}"
    cmd << " #{Gem::Command.build_args.join ' '}" unless Gem::Command.build_args.empty?
    run cmd, results, class_name, cmake_dir
  end
  make dest_path, results, cmake_dir
  results
end