[bootlin/training-materials updates] master: Revert "labs/yocto-first-build-stm32: use ready-made sstate" (4feff1c1)

[Michael Opdenacker]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/4feff1c17963ba554f157b8624e58946b755df4b

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commit 4feff1c17963ba554f157b8624e58946b755df4b
Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
Date:   Tue Oct 24 17:22:48 2023 +0200

    Revert "labs/yocto-first-build-stm32: use ready-made sstate"
    
    This reverts commit 6391dbf0d3c47568badbd75f94ad204c1eec00c2.
    Sharing the sstate cache in another way.


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4feff1c17963ba554f157b8624e58946b755df4b
 .../yocto-first-build-stm32.tex                    | 24 ----------------------
 1 file changed, 24 deletions(-)

diff --git a/labs/yocto-first-build-stm32/yocto-first-build-stm32.tex b/labs/yocto-first-build-stm32/yocto-first-build-stm32.tex
index 8f518201..f7f0d499 100644
--- a/labs/yocto-first-build-stm32/yocto-first-build-stm32.tex
+++ b/labs/yocto-first-build-stm32/yocto-first-build-stm32.tex
@@ -63,30 +63,6 @@ STM32MP layers. Edit the layer configuration file
 \code{meta-openembedded/meta-oe}, \code{meta-openembedded/meta-python} and \code{meta-st-stm32mp} directory to the
 \code{BBLAYERS} variable.
 
-\section{Configure the reuse of prebuilt artifacts}
-
-On the STM32MP platform, the first build can take a very long time, in
-particular because of the need to build the Rust compiler to build
-Python cryptographic modules necessary to build the firmware (op-tee)
-binaries.
-
-Unless you have a very fast machine or plenty of time ahead of you, we
-recommend to configure your build so that it can reuse prebuilt
-artifacts. Such artifacts do not carry the risk to generate wrong
-binaries, because if they don't match the actual sources or build
-platform that you have, the binaries will be generated from source.
-
-This is one of the mechanisms that make BitBake run successive builds
-much faster, reusing binaries from previous runs whenever applicable.
-
-So add the below lines to your \code{conf/local.conf}:
-
-\begin{verbatim}
-BB_SIGNATURE_HANDLER = "OEEquivHash"
-BB_HASHSERVE = "auto"
-SSTATE_MIRRORS ?= "file://.* http://bootlin.com/yocto/sstate/stm32mp1/PATH;downloadfilename=PATH"
-\end{verbatim}
-
 \section{Build your first image}
 
 Now that you're ready to start the compilation, simply run: