Build Xorg on Debian 9 LXDE

[KKing]

I'm trying to build xorg on Debian 9 uname-r = 4.9.0-12-amd64.

I've build new kernel and am now trying to follow instructions in

https://www.x.org/wiki/Development/BuildingX/

I believe I've followed the instructions and the only deviation was the 
instructions say use git x11proto which yields
     user at deb9-vm:~/dev/xorg/x11proto$ ./autogen.sh --prefix=/opt/gfx-test
     This module has been deprecated. Use xorgproto instead:

so I have
     git clone git://anongit.freedesktop.org/git/xorg/proto/xorgproto

and run
     ./autogen.sh --prefix=/opt/gfx-test

without issue and carry on no issue until after I run
     git clone git://git.freedesktop.org/git/mesa/drm

I get
     user at deb9-vm:~/dev/xorg/drm$ ./autogen.sh --prefix=/opt/gfx-test
     bash: ./autogen.sh: No such file or directory

So as the main page says the instructions are "in short" I refer to the 
link inferring more detail
     https://dri.freedesktop.org/wiki/Building/

I follow the debian instructions and follow
<<
On Debian/Ubuntu

If you are using Debian or Ubuntu you can install the packages with:

apt-get build-dep libdrm mesa
apt-get install linux-headers-`uname -r`
apt-get install libxi-dev libxmu-dev x11proto-xf86vidmode-dev
apt-get install git autoconf automake libtool
 >>
that all goes through no issue until after the
     git clone git://anongit.freedesktop.org/git/mesa/mesa

I get
     user at deb9-vm:~/dev/xorg/mesa$ ./autogen.sh
     bash: ./autogen.sh: No such file or directory

fyi
     user at deb9-vm:~/dev/xorg/mesa$ ls
     Android.common.mk  Android.mk  appveyor.yml  bin build-support  
CleanSpec.mk  common.py  docs  doxygen  include meson.build  
meson_options.txt  README.rst  REVIEWERS  scons SConstruct  src  
subprojects  VERSION

Any thoughts

K.