[FE training-materials-updates] Boottime labs: no more precompiled environment available

[Michael Opdenacker]

Repository : git://git.free-electrons.com/training-materials.git
On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=d8388f74d5a093f01be3278198fb62f03d6a9cfc

>---------------------------------------------------------------

commit d8388f74d5a093f01be3278198fb62f03d6a9cfc
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Sun Apr 17 05:47:05 2016 +0200

    Boottime labs: no more precompiled environment available
    
    - Obsolete anyway!
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


>---------------------------------------------------------------

d8388f74d5a093f01be3278198fb62f03d6a9cfc
 labs/boottime-measuring/boottime-measuring.tex | 25 ++++---------------------
 1 file changed, 4 insertions(+), 21 deletions(-)

diff --git a/labs/boottime-measuring/boottime-measuring.tex b/labs/boottime-measuring/boottime-measuring.tex
index b2e8cad..1e2ff6a 100644
--- a/labs/boottime-measuring/boottime-measuring.tex
+++ b/labs/boottime-measuring/boottime-measuring.tex
@@ -170,28 +170,11 @@ is often useful in an optimization project.
 sudo apt-get install meld
 \end{verbatim}
 
-If you are using the official Ubuntu version required for this course
-(Ubuntu Desktop 12.04), we advise you to use the precompiled
-Buildroot environment available in the USB flash drive provided by your
-instructor.
-
-If you don't mind spending one to several hours
-downloading source archives and compiling your root filesystem from
-scratch, you can do it by follow the instructions available on
-\url{http://free-electrons.com/labs/boottime/README.txt}.
-
-Here's how to use the pre-compiled Buildroot environment (make sure you
-use the exact same directories, otherwise the pre-compiled environment
-won't work):
-
-\begin{verbatim}
-cd /opt/boot-time-labs/buildroot/
-tar xf /media/$USER/BootTime/precompiled/buildroot-at91-`arch`.tar.xz
-\end{verbatim}
+Now, to be able to update the root filesystem, you need to reconstitute
+the Buildroot environment that was used to generate it. 
 
-You can see that the above command automatically picks up the right
-pre-compiled environment, depending on whether you have a 32 bit or
-a 64 bit version of Ubuntu.
+Do it by following the instructions available on
+\url{http://free-electrons.com/labs/boottime/README.txt}.
 
 \section{Study how user space boots}