+SET(BBTK_DOC_INSTALL_PATH ${CMAKE_INSTALL_PREFIX}/${BBTK_DOC_REL_PATH})
+SET(BBTK_BBDOC_INSTALL_PATH ${CMAKE_INSTALL_PREFIX}/${BBTK_BBDOC_REL_PATH})
+SET(BBTK_DOXYGEN_INSTALL_PATH ${CMAKE_INSTALL_PREFIX}/${BBTK_DOXYGEN_REL_PATH})
+SET(BBTK_BBS_INSTALL_PATH ${CMAKE_INSTALL_PREFIX}/${BBTK_BBS_REL_PATH})
+
+# Create build directories if necessary
+MKDIR(${BBTK_DOC_BUILD_PATH})
+MKDIR(${BBTK_BBDOC_BUILD_PATH})
+MKDIR(${BBTK_DOXYGEN_BUILD_PATH})
+MKDIR(${BBTK_DOXYGEN_BUILD_PATH})
+MKDIR(${BBTK_BBS_BUILD_PATH})
+
+#MESSAGE(STATUS "doc='${BBTK_DOC_INSTALL_PATH}'")