[bootlin/training-materials updates] master: yocto: slides: extend Varflags section (5eafa7db)

[Luca Ceresoli]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/5eafa7db61af0d1e36c3bcea9038663e2f367291

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

commit 5eafa7db61af0d1e36c3bcea9038663e2f367291
Author: Luca Ceresoli <luca.ceresoli at bootlin.com>
Date:   Fri Mar 10 18:46:46 2023 +0100

    yocto: slides: extend Varflags section
    
    Split in two slides and add:
    
     * Link to bitbake docs
     * mention that more varflags can be added freely
     * add [depends]
     * cleanup the examples with one bullet + one example per item
    
    Signed-off-by: Luca Ceresoli <luca.ceresoli at bootlin.com>


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5eafa7db61af0d1e36c3bcea9038663e2f367291
 slides/yocto-recipe-extra/yocto-recipe-extra.tex | 50 ++++++++++++++++--------
 1 file changed, 33 insertions(+), 17 deletions(-)

diff --git a/slides/yocto-recipe-extra/yocto-recipe-extra.tex b/slides/yocto-recipe-extra/yocto-recipe-extra.tex
index 2ee2854a..77379c4f 100644
--- a/slides/yocto-recipe-extra/yocto-recipe-extra.tex
+++ b/slides/yocto-recipe-extra/yocto-recipe-extra.tex
@@ -68,29 +68,45 @@ do_install() {
 \begin{frame}[fragile]
   \frametitle{Variable flags}
   \begin{itemize}
-    \item {\em Variable flags} are used to store extra information on
-      tasks and variables.
+    \item {\em Variable flags}, or {\em varflags}, are used to store extra
+      information on tasks and variables.
+    \item They are used to control task functionalities.
+    \item A typical example:
   \begin{minted}{sh}
 SRC_URI[md5sum] = "97b2c3fb082241ab5c56ab728522622b"
   \end{minted}
-    \item They are used to control task functionalities.
-    \item A number of these flags are already used by BitBake:
-      \begin{itemize}
-        \item \code{dirs}: directories that should be created before the
-          task runs. The last one becomes the work directory for the
-          task.
-        \item \code{noexec}: disable the execution of the task.
-        \item \code{nostamp}: do not create a {\em stamp} file when
-          running the task. The task will always be executed.
-        \item \code{doc}: task documentation displayed by {\em
-          listtasks}.
-      \end{itemize}
+  \item See
+    \href{https://docs.yoctoproject.org/bitbake/2.2/bitbake-user-manual/bitbake-user-manual-metadata.html#variable-flags}{the list of varflags supported by Bitbake}.
+  \item More varflags can be added freely.
   \end{itemize}
-  \begin{minted}{sh}
-do_menuconfig[nostamp] = "1"
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Examples}
+  \begin{itemize}
+    \item \code{dirs}: directories that should be created before the task
+      runs. The last one becomes the work directory for the task.
+      \begin{minted}{sh}
+do_compile[dirs] = "${B}"
+      \end{minted}
+    \item \code{noexec}: disable the execution of the task.
+      \begin{minted}{sh}
 do_settime[noexec] = "1"
+      \end{minted}
+    \item \code{nostamp}: do not create a {\em stamp} file when running the
+      task. The task will always be executed.
+      \begin{minted}{sh}
+do_menuconfig[nostamp] = "1"
+      \end{minted}
+    \item \code{doc}: task documentation displayed by {\em listtasks}.
+      \begin{minted}{sh}
 do_settime[doc] = "Set the current time in ${TIME}"
-  \end{minted}
+      \end{minted}
+    \item \code{depends}: add a dependency between specific tasks
+      \begin{minted}{sh}
+do_patch[depends] = "quilt-native:do_populate_sysroot"
+      \end{minted}
+  \end{itemize}
 \end{frame}
 
 \subsection{Packages features}