On Mon, 30 Dec 2024, Maciej W. Rozycki wrote:
> > Contrary to user documentation the `-mbwx', `-mcix', `-mfix', `-mmax'
> > feature options and their inverse forms are ignored whenever `-mcpu='
> > option is in effect, either by having been given explicitly or where
> > configured as the default such as with the `alphaev56-linux-gnu' target.
> > In the latter case there is no way to change the settings these options
> > are supposed to tweak other than with `-mcpu=' and the settings cannot
> > be individually controlled, making all the feature options permanently
> > inactive.
>
> NB it seems this is a regression from commit 7816bea0e23b ("config.gcc:
> Reorganize --with-cpu logic.") back in 2003, which replaced the setting of
> the default feature mask with the setting of the default CPU across a few
> targets, and the complementing logic in the Alpha backend wasn't updated
> accordingly.
>
> I'll adjust the change description to mention this observation when I get
> to pushing it.
I've now made the adjustment and posted a revised version as 1/7 along
with the series here:
<https://inbox.sourceware.org/gcc-patches/[email protected]/>.
Maciej
