+AC_CHECK_PROGS([DOXYGEN], [doxygen])
+if test -z "$DOXYGEN"; then
+ AC_MSG_WARN([Doxygen not found - continuing without Doxygen support])
+fi
+
+AM_CONDITIONAL([HAVE_DOXYGEN], [test -n "$DOXYGEN"])
+AM_COND_IF([HAVE_DOXYGEN], [AC_CONFIG_FILES([docs/Doxyfile])])
+