[FE training-materials-updates] App dev lab: add Thomas' explanations about pkg-config

[Michael Opdenacker]

Repository : git://git.free-electrons.com/training-materials.git

On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=6af230f9315f27f4d804e0f2d2b5ee4588d157de

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commit 6af230f9315f27f4d804e0f2d2b5ee4588d157de
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Fri Mar 28 12:31:11 2014 +0100

    App dev lab: add Thomas' explanations about pkg-config
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


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6af230f9315f27f4d804e0f2d2b5ee4588d157de
 .../sysdev-application-development.tex             |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/labs/sysdev-application-development/sysdev-application-development.tex b/labs/sysdev-application-development/sysdev-application-development.tex
index 48d962c..4f90df1 100644
--- a/labs/sysdev-application-development/sysdev-application-development.tex
+++ b/labs/sysdev-application-development/sysdev-application-development.tex
@@ -49,7 +49,10 @@ It complains that it cannot find the directfb.h header. This is
 normal, since we didn't tell the compiler where to find it. So let's
 use \code{pkg-config} to query the {\em pkg-config} database about the
 location of the header files and the list of libraries needed to build
-an application against DirectFB:
+an application against DirectFB:\footnote{Again,
+\code{output/host/usr/bin} has a special \code{pkg-config} that
+automatically knows where to look, so it already knows the right paths
+to find \code{.pc} files and their sysroot.}
 
 \footnotesize
 \begin{verbatim}