try_run(RAN_${var} HAVE_${var} ${CMAKE_BINARY_DIR} ${src}
  COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
  LINK_OPTIONS ${CMAKE_REQUIRED_LINK_OPTIONS}
  LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}
  CMAKE_FLAGS
    "-DCOMPILE_DEFINITIONS:STRING=${CMAKE_REQUIRED_FLAGS}"
    "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}"
  COMPILE_OUTPUT_VARIABLE compile_output
  RUN_OUTPUT_VARIABLE run_output
  )