[PATCHv4] powerpc: Automatic CPU detection in preconfigure

[Paul E Murphy]

On 6/8/20 4:10 PM, Paul E. Murphy via Libc-alpha wrote:
> +  archcpu=`echo "int foo () { return 0; }" \
> +	   | $CC $CFLAGS $CPPFLAGS -S -frecord-gcc-switches -xc -o - - \
> +	   | grep -E "mcpu=|.machine" -m 1 \
> +	   | sed -e "s/.*machine \(.*\)/\1/" -e "s/.*mcpu=\(.*\)\"/\1/"`

Pushed with simplification to:

+	   | sed -e "s/.*machine //" -e "s/.*mcpu=\(.*\)\"/\1/"`

As indirectedly suggested by Tulio on v3:
<https://sourceware.org/pipermail/libc-alpha/2020-June/114912.html>