necessary tools.
The first time you build, there are a couple of extra steps.
-First, generate the `configure' script:
+First, generate the `configure' script and some related files:
$ ./autogen.sh
-(or you can just run `autoreconf -I m4').
+(or you can just run `autoreconf -i -I m4').
You can then configure your build (use `./configure --help' to see
options you can set):