Re: [PATCH v1 3/6] configure: also skip deprecated targets with target-list-exclude

[Peter Maydell <peter.maydell@linaro.org>]

On Mon, 14 Sep 2020 at 16:27, Alex Bennée <alex.bennee@linaro.org> wrote:
>
> Now the user has to make an even more deliberate decision to
> enable a deprecated target rather than getting it as a side effect of
> using --target-exclude-list.
>
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> ---
>  configure | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/configure b/configure
> index e365a90cc133..50052378e417 100755
> --- a/configure
> +++ b/configure
> @@ -1722,9 +1722,15 @@ if [ "$bsd_user" = "yes" ]; then
>      mak_wilds="${mak_wilds} $source_path/default-configs/*-bsd-user.mak"
>  fi
>
> -if test -z "$target_list_exclude" -a -z "$target_list"; then
> -    # if the user doesn't specify anything lets skip deprecating stuff
> -    target_list_exclude=ppc64abi32-linux-user
> +# If the user doesn't explicitly specify a deprecated target we will
> +# skip it.
> +if test -z "$target_list"; then
> +    deprecated_targets_list=ppc64abi32-linux-user

If you put this variable setting outside the if...

> +    if test -z "$target_list_exclude"; then
> +        target_list_exclude="$deprecated_targets_list"
> +    else
> +        target_list_exclude="$target_list_exclude,$deprecated_targets_list"
> +    fi
>  fi
>
>  exclude_list=$(echo "$target_list_exclude" | sed -e 's/,/ /g')

then later on once we've parsed the exclude list and set
default_target_list we can say something like (untested!)

for dep_target in $(echo "$deprecated_targets_list" | sed -e 's/,/ /g'); do
    for target in $default_target_list; do
        if "$dep_target" = "target"; then
            add_to deprecated_features $target
            break
        fi
    done
done

and then the only thing necessary to add another deprecated target
will be to add it to the variable (ie we can just delete the
add_to line your patch 2 puts in as we don't need to modify
that code at all any more).

(Side note: I just followed the code we have currently for
doing the "is the target in the exclude list" but this
seems tremendously clunky given we're really just trying
to ask "is string X in set Y"...)

thanks
-- PMM