+#=========================================================
+# If the user choose to build documentation, then search for Doxygen executables.
+OPTION(BUILD_DOXYGEN "Build Doxygen Documentation" OFF)
+IF(BUILD_DOXYGEN)
+ FIND_PACKAGE(Doxygen)
+ ADD_SUBDIRECTORY(Doxygen)
+ENDIF(BUILD_DOXYGEN)
+#=========================================================
+