SET(BUILD_DOC ON CACHE BOOL "Do you want to build the documentation ? [ON|OFF]")
#Only
IF(BUILD_DOC)
  IF(PYTHONINTERP_FOUND AND SIP_OK)
    IF(SPHINX_FOUND)
      ADD_SUBDIRECTORY(python)
      ADD_SUBDIRECTORY(user)
      ADD_SUBDIRECTORY(developer)
    ELSE(SPHINX_FOUND)
      MESSAGE(AUTHOR_WARNING "Sphinx not found: unable to generate the documentation.")
    ENDIF(SPHINX_FOUND)
  ENDIF(PYTHONINTERP_FOUND AND SIP_OK)

  IF(LINUX OR APPLE)
    FIND_PACKAGE(Doxygen)
    IF(DOXYGEN_FOUND)
      ADD_SUBDIRECTORY(doxygen)
    ELSE(DOXYGEN_FOUND)
      MESSAGE(AUTHOR_WARNING "doxygen not found: unable to generate the documentation.")
    ENDIF(DOXYGEN_FOUND)
  ENDIF(LINUX OR APPLE)
ENDIF(BUILD_DOC)
