[PATCH v2] RISC-V: Deprecate ".option arch, -ext" for users due to its controversial use

[Andreas Schwab]

On Jul 09 2025, Nelson Chu wrote:

> @@ -217,17 +219,11 @@ desirable.
>  Enables or disables the CSR checking.
>  
>  @item arch, @var{+extension[version]} [,...,@var{+extension_n[version_n]}]
> -@itemx arch, @var{-extension} [,...,@var{-extension_n}]
>  @itemx arch, @var{ISA}
> -Enables or disables the extensions for specific code region.  For example,
> -@samp{.option arch, +m2p0} means add m extension with version 2.0, and
> -@samp{.option arch, -f, -d} means remove extensions, f and d, from the
> -architecture string.  Note that, @samp{.option arch, +c, -c} have the same
> -behavior as @samp{.option rvc, norvc}.  However, they are also undesirable
> -sometimes.  Besides, @samp{.option arch, -i} is illegal, since we cannot
> -remove the base i extension anytime.  If you want to reset the whole ISA
> -string, you can also use @samp{.option arch, rv32imac} to overwrite the
> -previous settings.
> +Enables or reset the extensions for specific code region.  For example,

Enable or reset ...

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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"And now for something completely different."