[FE training-materials-updates] labs: yocto-lab3: Fix ninvaders error

[Antoine Ténart]

Repository : git://git.free-electrons.com/training-materials.git
On branch  : dev_mylene/yocto_update/krogoth
Link       : http://git.free-electrons.com/training-materials/commit/?id=283a6ac412022d5f1b7505d36f05fc7280ade1d2

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commit 283a6ac412022d5f1b7505d36f05fc7280ade1d2
Author: Mylène Josserand <mylene.josserand at free-electrons.com>
Date:   Fri Jun 17 15:08:46 2016 +0200

    labs: yocto-lab3: Fix ninvaders error
    
    Modifications/differences:
       - Error while building ninvaders: "File format not recognized".
       This is due to the use of GCC instead of a $CROSS_COMPILE-gcc.
       So added an tip about Makefile's with mistakes.
    
    Signed-off-by: Mylène Josserand <mylene.josserand at free-electrons.com>


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283a6ac412022d5f1b7505d36f05fc7280ade1d2
 labs/yocto-add-application/yocto-add-application.tex | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/labs/yocto-add-application/yocto-add-application.tex b/labs/yocto-add-application/yocto-add-application.tex
index 7f4ea81..7b1fd4e 100644
--- a/labs/yocto-add-application/yocto-add-application.tex
+++ b/labs/yocto-add-application/yocto-add-application.tex
@@ -70,7 +70,10 @@ If you hang on a problem, check the following points:
 \end{itemize}
 
 Tip: BitBake has command line flags to increase its verbosity and activate debug
-outputs.
+outputs. Also, remember that you need to cross-compile nInvaders for ARM ! Maybe,
+you will have to configure your recipe to resolve some mistakes done in the
+application's Makefile (which is often the case). A bitbake variable permits
+to add some Makefile's options, you should look for it.
 
 \section{Update the rootfs and test}