macro (enable_arg _enable_name _enable_default)
if (${ARGC} GREATER 2)
  set(_auto_arg_help
      ${_AUTO_ARG_HELP}
      "-Denable-${_enable_name}=[true|false] -- ${ARGV2} (default: ${_enable_default})"
     )
endif()

if(NOT DEFINED enable-${_enable_name} AND NOT DEFINED disable-${_enable_name})
  set(enable_${_enable_name} ${_enable_default})
elseif(DEFINED enable-${_enable_name})
  if(enable-${_enable_name})
    set(enable_${_enable_name} true)
  else()
    set(enable_${_enable_name} false)
  endif()
  unset(enable-${_enable_name})
  unset(enable-${_enable_name} CACHE)
elseif(DEFINED disable-${_enable_name})
  if(disable-${_enable_name})
    set(enable_${_enable_name} false)
  else()
    set(enable_${_enable_name} true)
  endif()
  unset(disable-${_enable_name})
  unset(disable-${_enable_name} CACHE)
endif()
endmacro()

macro(args_help)
if(DEFINED help-args)
  message("Control arguments:")
  foreach(_args_help ${_AUTO_ARG_HELP})
    message(${_args_help})
  endforeach()
  unset(help-args)
  unset(help-args CACHE)
endif()
endmacro()