+ AC_MSG_ERROR( [You do not seem to have makeinfo >= 4.6.
+You will not be able to build the Emacs manuals.
+In Emacs releases, they are prebuilt, so this might not be a problem.
+Your source tree $gotinfo to have manuals in the `info' directory.
+Either install a suitable version of makeinfo, or re-run configure
+with the `--without-makeinfo' option.] )
+
+fi