text: include(EigenTesting)
  include(CheckCXXSourceCompiles)
  
  # configure the "site" and "buildname"
  ei_set_sitename()
  
  # retrieve and store the build string
  ei_set_build_string()
  
  add_custom_target(buildtests)
  add_custom_target(check COMMAND "ctest")
  add_dependencies(check buildtests)
  
  # check whether /bin/bash exists
  find_file(EIGEN_BIN_BASH_EXISTS "/bin/bash" PATHS "/" NO_DEFAULT_PATH)
  
  # This call activates testing and generates the DartConfiguration.tcl
  include(CTest)
  
  set(EIGEN_TEST_BUILD_FLAGS "" CACHE STRING "Options passed to the build command of unit tests")
  
  # Overwrite default DartConfiguration.tcl such that ctest can build our unit tests.
  # Recall that our unit tests are not in the "all" target, so we have to explicitely ask ctest to build our custom 'buildtests' target.
  # At this stage, we can also add custom flags to the build tool through the user defined EIGEN_TEST_BUILD_FLAGS variable.
  file(READ  "${CMAKE_CURRENT_BINARY_DIR}/DartConfiguration.tcl" EIGEN_DART_CONFIG_FILE)
  # try to grab the default flags
  string(REGEX MATCH "MakeCommand:.*-- (.*)\nDefaultCTestConfigurationType" EIGEN_DUMMY ${EIGEN_DART_CONFIG_FILE})
  if(NOT CMAKE_MATCH_1)
  string(REGEX MATCH "MakeCommand:.*[^c]make (.*)\nDefaultCTestConfigurationType" EIGEN_DUMMY ${EIGEN_DART_CONFIG_FILE})
  endif()
  string(REGEX REPLACE "MakeCommand:.*DefaultCTestConfigurationType" "MakeCommand: ${CMAKE_COMMAND} --build . --target buildtests --config \"\${CTEST_CONFIGURATION_TYPE}\" -- ${CMAKE_MATCH_1} ${EIGEN_TEST_BUILD_FLAGS}\nDefaultCTestConfigurationType"
         EIGEN_DART_CONFIG_FILE2 ${EIGEN_DART_CONFIG_FILE})
  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/DartConfiguration.tcl" ${EIGEN_DART_CONFIG_FILE2})
  
  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/CTestCustom.cmake.in ${CMAKE_BINARY_DIR}/CTestCustom.cmake)
  
  # some documentation of this function would be nice
  ei_init_testing()
  
  # configure Eigen related testing options
  option(EIGEN_NO_ASSERTION_CHECKING "Disable checking of assertions using exceptions" OFF)
  option(EIGEN_DEBUG_ASSERTS "Enable advanced debuging of assertions" OFF)
  
  if(CMAKE_COMPILER_IS_GNUCXX)
    option(EIGEN_COVERAGE_TESTING "Enable/disable gcov" OFF)
    if(EIGEN_COVERAGE_TESTING)
      set(COVERAGE_FLAGS "-fprofile-arcs -ftest-coverage")
      set(CTEST_CUSTOM_COVERAGE_EXCLUDE "/test/")
    else(EIGEN_COVERAGE_TESTING)
      set(COVERAGE_FLAGS "")
    endif(EIGEN_COVERAGE_TESTING)
    if(EIGEN_TEST_C++0x)
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++0x")
    endif(EIGEN_TEST_C++0x)
    if(CMAKE_SYSTEM_NAME MATCHES Linux)
      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${COVERAGE_FLAGS} -g2")
      set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${COVERAGE_FLAGS} -O2 -g2")
      set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${COVERAGE_FLAGS} -fno-inline-functions")
      set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COVERAGE_FLAGS} -O0 -g3")
    endif(CMAKE_SYSTEM_NAME MATCHES Linux)
  elseif(MSVC)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D_CRT_SECURE_NO_WARNINGS /D_SCL_SECURE_NO_WARNINGS")
  endif(CMAKE_COMPILER_IS_GNUCXX)
  