[bootlin/training-materials updates] master: C libraries: update comparisons of sizes (a2fac8cd)

[Michael Opdenacker]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/a2fac8cd4d46ca750c14f87537218c34d9db9cde

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

commit a2fac8cd4d46ca750c14f87537218c34d9db9cde
Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
Date:   Tue Feb 23 23:17:15 2021 +0100

    C libraries: update comparisons of sizes
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>


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a2fac8cd4d46ca750c14f87537218c34d9db9cde
 slides/c-libraries/c-libraries.tex | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/slides/c-libraries/c-libraries.tex b/slides/c-libraries/c-libraries.tex
index 81fec1bd..9dca0ca6 100644
--- a/slides/c-libraries/c-libraries.tex
+++ b/slides/c-libraries/c-libraries.tex
@@ -75,27 +75,31 @@
   Let's compile and strip a \code{hello.c} program {\bf statically} and
 compare the size
   \begin{itemize}
-    \item With gcc 6.3, armel, musl 1.1.16:\\
-          {\bf 7300} bytes
-    \item With gcc 6.3, armel, uclibc-ng 1.0.22 :\\
-          {\bf 67204} bytes.
-    \item With gcc 6.2, armel, glibc:\\
-          {\bf 492792} bytes
+    \item With musl 1.2.0:\\
+          {\bf 9,084} bytes
+    \item With uclibc-ng 1.0.34 :\\
+          {\bf 21,916} bytes.
+    \item With glibc 2.31:\\
+          {\bf 431,140} bytes
   \end{itemize}
+  Tests run with \code{gcc 10.0.2} toolchains for \code{armv7-eabihf}\\
+  (from \url{https://toolchains.bootlin.com})
 \end{frame}
 
-\begin{frame}{glibc vs uclibc vs musl (static)}
-  Let's compile and strip BusyBox 1.26.2 {\bf statically} and compare the size
+\begin{frame}{glibc vs uclibc vs musl - more realistic example}
+  Let's compile and strip BusyBox 1.32.1 {\bf statically}\\
+  (with the \code{defconfig} configuration) and compare the size
   \begin{itemize}
-    \item With gcc 6.3, armel, musl 1.1.16:\\
-          {\bf 183348} bytes
-    \item With gcc 6.3, armel, uclibc-ng 1.0.22 :\\
-          {\bf 210620} bytes.\\
-    \item With gcc 6.2, armel, glibc:\\
-          {\bf 755088} bytes
+    \item With musl 1.2.0:\\
+          {\bf 1,176,744} bytes
+    \item With uclibc-ng 1.0.34 :\\
+          {\bf 1,251,080} bytes.\\
+    \item With glibc 2.31:\\
+          {\bf 1,852,912} bytes
   \end{itemize}
   Notes:
   \begin{itemize}
+    \item Tests run with \code{gcc 10.0.2} toolchains for \code{armv7-eabihf}
     \item BusyBox is automatically compiled with \code{-Os} and stripped.
     \item Compiling with shared libraries will mostly eliminate size differences
   \end{itemize}