linux-kernel - Re: [PATCH] powerpc: e500: Fix compilation with gcc e500 compiler

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Message-ID: <20220524195216.GL25951@gate.crashing.org>
Date:   Tue, 24 May 2022 14:52:16 -0500
From:   Segher Boessenkool <segher@...nel.crashing.org>
To:     Pali Rohár <pali@...nel.org>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc: e500: Fix compilation with gcc e500 compiler

On Tue, May 24, 2022 at 09:16:10PM +0200, Pali Rohár wrote:
> On Tuesday 24 May 2022 13:52:47 Segher Boessenkool wrote:
> > Aha.  Right, because this config forces -mspe it requires one of these
> > CPUs.
> > 
> > You can use a powerpc-linux compiler instead, and everything will just
> > work.  These CPUs are still supported, in all of GCC 9 .. GCC 12 :-)
> 
> Ok. I can use different "generic" powerpc compiler (It should work fine
> as you said, as it has also -mcpu=8540 option). But I think that
> compilation of kernel should be supported also by that gcc 8.5.0 e500
> compiler.

That linuxspe compiler you mean.  Sure, why not, the more the merrier,
as long as it doesn't get in the way of other stuff, I won't protest.

But please don't confuse people: you are talking about a
powerpc-linuxspe compiler, not e500, which is supported just fine by
current GCC trunk still, and does not have such limitations :-)


Segher