Re: [Qemu-devel] [PATCH 06/10] target-i386: print obsolete warnings if +-features are used

[Paolo Bonzini <pbonzini@redhat.com>]

On 06/06/2016 17:16, Igor Mammedov wrote:
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> ---
>  target-i386/cpu.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> index f791a06..31e5e6f 100644
> --- a/target-i386/cpu.c
> +++ b/target-i386/cpu.c
> @@ -1975,6 +1975,9 @@ static void x86_cpu_parse_featurestr(CPUState *cs, char *features,
>                  error_propagate(errp, local_err);
>                  return;
>              }
> +            fprintf(stderr,
> +                "'+%s' is obsolete and will be removed in future, use '%s=on'",
> +                featurestr + 1, featurestr + 1);

Could you detect using +foo together with foo=off, and -foo together
with foo=on?  Those are the really problematic cases, without them +foo
and -foo can become synonyms for =on and =off.

Paolo

>              continue;
>          } else if (featurestr[0] == '-') {
>              add_flagname_to_bitmaps(featurestr + 1, minus_features, &local_err);
> @@ -1982,6 +1985,9 @@ static void x86_cpu_parse_featurestr(CPUState *cs, char *features,
>                  error_propagate(errp, local_err);
>                  return;
>              }
> +            fprintf(stderr,
> +                "'-%s' is obsolete and will be removed in future, use '%s=off'",
> +                featurestr + 1, featurestr + 1);
>              continue;
>          }
>  
>