[FFmpeg-devel] [PATCH v2] configure: fix clang on macOS 10.15

[Jan Ekström]

On Wed, Apr 15, 2020 at 4:34 PM Josh de Kock <josh at itanimul.li> wrote:
>
> Works around a bug in the newer Xcode 11's clang with -fstack-check
> emitting bad code with misaligned call instructions.
>
> This fixes Trac #8073
> ---
>  configure | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/configure b/configure
> index 4d4c429be9..2ede4e7163 100755
> --- a/configure
> +++ b/configure
> @@ -5358,6 +5358,11 @@ case $target_os in
>          fi
>          version_script='-exported_symbols_list'
>          VERSION_SCRIPT_POSTPROCESS_CMD='tr " " "\n" | sed -n /global:/,/local:/p | grep ";" | tr ";" "\n" | sed -E "s/(.+)/_\1/g" | sed -E "s/(.+[^*])$$$$/\1*/"'
> +        # Workaround for Xcode 11 -fstack-check bug
> +        if enabled clang; then
> +            clang_version=$($cc -dumpversion)
> +            test ${clang_version%%.*} -eq 11 && add_cflags -fno-stack-check
> +        fi

Thank you, LGTM from me.

Jan