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SubjectRe: [PATCH] powerpc: Do not consider weak unresolved symbol relocations as bad
Hi Alexandre,

Thanks for sorting this out. Just a few comments below.

On Wed, 15 Jan 2020 15:46:48 -0500 Alexandre Ghiti <alex@ghiti.fr> wrote:
>

>
> # Have Kbuild supply the path to objdump so we handle cross compilation.
^
"and nm"

> +# Remove from the bad relocations those that match an undefined weak symbol
> +# which will result in an absolute relocation to 0.
> +# Weak unresolved symbols are of that form in nm output:
> +# " w _binary__btf_vmlinux_bin_end"
> +undef_weak_symbols=$($nm "$vmlinux" | awk -e '$1 ~ /w/ { print $2 }')
> +
> +while IFS= read -r weak_symbol; do
> + bad_relocs="$(echo -n "$bad_relocs" | sed "/$weak_symbol/d")"
> +done <<< "$undef_weak_symbols"

This is not a bash script, and the above is a bashism :-(
Also, my version of awk (mawk) doesn't have a -e option.

How about something like :

undef_weak_symbols=$($nm "$vmlinux" | awk '$1 ~ /w/ { print $2 }')
if [ "$undef_weak_symbols" ]; then
bad_relocs="$(echo "$bad_relocs" | grep -F -w -v "$undef_weak_symbols")"
fi

Or do this near the top and add the grep to the others.
--
Cheers,
Stephen Rothwell
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