macro(SET_OPTION _NAME _DESC)

   list(APPEND ALLOPTIONS ${_NAME})

   if(${ARGC} EQUAL 3)

     set(_DEFLT ${ARGV2})

   else()

     set(_DEFLT OFF)

   endif()

   option(${_NAME} ${_DESC} ${_DEFLT})

 endmacro()

 macro(DEP_OPTION _NAME _DESC _DEFLT _DEPTEST _FAILDFLT)

   list(APPEND ALLOPTIONS ${_NAME})

   cmake_dependent_option(${_NAME} ${_DESC} ${_DEFLT} ${_DEPTEST} ${_FAILDFLT})

 endmacro()

 macro(OPTION_STRING _NAME _DESC _VALUE)

   list(APPEND ALLOPTIONS ${_NAME})

   set(${_NAME} ${_VALUE} CACHE STRING "${_DESC}")

   set(HAVE_${_NAME} ${_VALUE})

 ENDMACRO()

 # Message Output

 macro(MESSAGE_WARN _TEXT)

   message(STATUS "*** WARNING: ${_TEXT}")

 endmacro()

 macro(MESSAGE_ERROR _TEXT)

   message(FATAL_ERROR "*** ERROR: ${_TEXT}")

 endmacro()

 macro(MESSAGE_BOOL_OPTION _NAME _VALUE)

   if(${_VALUE})

     message(STATUS "  ${_NAME}:\tON")

   else()

     message(STATUS "  ${_NAME}:\tOFF")

   endif()

 endmacro()

 macro(MESSAGE_TESTED_OPTION _NAME)

   set(_REQVALUE ${${_NAME}})

   set(_PAD " ")

   if(${ARGC} EQUAL 2)

     set(_PAD ${ARGV1})

   endif()

   if(NOT HAVE_${_NAME})

     set(HAVE_${_NAME} OFF)

   elseif("${HAVE_${_NAME}}" MATCHES "1|TRUE|YES|Y")

     set(HAVE_${_NAME} ON)

   endif()

   message(STATUS "  ${_NAME}${_PAD}(Wanted: ${_REQVALUE}): ${HAVE_${_NAME}}")

 endmacro()

 macro(LISTTOSTR _LIST _OUTPUT)

   if(${ARGC} EQUAL 3)

     # prefix for each element

     set(_LPREFIX ${ARGV2})

   else()

     set(_LPREFIX "")

   endif()

   # Do not use string(REPLACE ";" " ") here to avoid messing up list

   # entries

   foreach(_ITEM ${${_LIST}})

     set(${_OUTPUT} "${_LPREFIX}${_ITEM} ${${_OUTPUT}}")

   endforeach()

 endmacro()

 macro(CHECK_OBJC_SOURCE_COMPILES SOURCE VAR)

   set(PREV_REQUIRED_DEFS "${CMAKE_REQUIRED_DEFINITIONS}")

   set(CMAKE_REQUIRED_DEFINITIONS "-ObjC ${PREV_REQUIRED_DEFS}")

   CHECK_C_SOURCE_COMPILES(${SOURCE} ${VAR})

   set(CMAKE_REQUIRED_DEFINITIONS "${PREV_REQUIRED_DEFS}")

 endmacro()