+Building Emacs from Bazaar requires some tools that are not needed
+when building from a release. You will need:
+
+autoconf - at least the version specified near the start of
+ configure.ac (in the AC_PREREQ command).
+automake - at least the version specified near the start of
+ configure.ac (in the AM_INIT_AUTOMAKE command).
+makeinfo - not strictly necessary, but highly recommended, so that
+ you can build the manuals.
+
+The `autogen.sh' script can help you figure out if you have the
+necessary tools.
+
+The first time you build, there are a couple of extra steps.
+First, generate the `configure' script and some related files:
+
+ $ ./autogen.sh
+
+(or you can just run `autoreconf -i -I m4').
+
+You can then configure your build (use `./configure --help' to see
+options you can set):