Bug#1036158: gcc-13: Please raise baseline for alpha to EV56

[Michael Cree <mcree@orcon.net.nz>]

On Tue, May 16, 2023 at 09:38:56AM +0200, John Paul Adrian Glaubitz wrote:
> After a long discussion on IRC and the mailing list, we have agreed to raise the
> baseline for the alpha architecture to EV56 to improve the generated code and fix
> a number of issues. The change is already being implemented in the glibc packages
> which switches to EV56 [1] since hwcaps are no longer available with glibc 2.37 [2].
> 
> Could you raise the baseline for gcc on alpha to EV56?
> 
> I assume, it should be "--with-cpu=ev56" or "--with-arch=ev56".

Yes, please!

I suggest the following in debian/rules2:

ifneq (,$(findstring alpha,$(DEB_TARGET_ARCH)))
  CONFARGS += --with-cpu=ev56 --with-tune=ev6
endif

(the --with-tune only affects instruction scheduling and better tunes
code for ev6 and more recent machines, but allows execution down to
ev56.)  I have tested this in the past with a rebuild of most packages
that are in the base essential chroot in the past and it works well.

Regards,
Michael.