Re: README: ports switching to GCC 8.

Thank you

On Tue, Dec 3, 2019 at 10:39 AM Michael L. Hitch <[email protected]> wrote:

> On Sun, 17 Nov 2019, Michael L. Hitch wrote:
>
> > On Sun, 17 Nov 2019, matthew green wrote:
> >
> >> hi folks.
> >>
> >>
> >> i've recently switched sparc* to GCC 8 and will be soon
> >> switching powerpc.  just running a few more tests to
> >> ensure builds should work.
> >>
> >> you'll probably need to do a clean build, though at least
> >> tools/gcc itself will be OK.
> >>
> >> as always, please send-pr or email me with issues related
> >> to this.
> >
> >  I tried to boot a sparc64 kernel that I think was built after the
> switch on
> > an Ultra 45, and it fails to find any disks.  I see the same problem
> with a
> > netbsd-9 branch kernel.  This looks very similar to PR
> port-sparc64/54211,
> > except that mine is an mtp controller.  That PR was after sparc64 was
> > switched to GCC 7, so my first instinct is the problem may be due to GCC
> 7
> > and GCC 8.  I haven't had any time to do any debugging yet, but hope to
> work
> > on it soon.
>
>    OK, I was able to track down the commit that causes this failure, and it
> was not obvious.  The commit was revision 1.69 of sys/dev/i2c/i2c.c.  This
> resulted in attempting to configure amdtemp0 instead of gpio0.  Reverting
> this change results in a working kernel - both netbsd-9 (gcc7) and
> -current (gcc8).
>
>    So far, I've only booted a new kernel.  I plan to install th whole
> release on a disk to see that other things work.
>
> Mike
>
> ---
> Michael L. Hitch                        [email protected]
> Operations Consulting,  University Information Technology
> Montana State University, Bozeman, MT     USA
>