Re: [PATCH][PPC32] Makefile cleanups and gcc-3.4+binutils-2.14 c

Giuliano Pochini
2004-07-30T19:01:38Z

On Thu, 29 Jul 2004 07:43:47 -0700
Tom Rini <trini@kernel.crashing.org> wrote:

> > I had no time to do a lot of testing, but it seems that binutils 2.15 +
> > gcc 3.3.3 is a bad one too. I didn't try to compile the kernel (which
> > may also break), but at least I couldn't compile gcc 3.4.1 with the
> > above combination. It seems that as doesn't get the -mxxx parameter
> > required to compile altivec stuff. Hacking the Makefile to make it
> > pass -Wa,-m7455 helped a little, but it eventually failed in another
> > weird way. I hadn't time to investigate further, sorry.
>
> Stock gcc-3.3.3 or from the hammer branch ?

Stock.

> There is, I think, a second
> problem that was left out. The problem with gcc-3.4 + binutils-2.14 is
> that -many gets passed, which zeros out previous flags. -many is fine
> in binutils-2.15 (and 2.13 and 2.12 and 2.12.1 it seems), but 2.15 does
> require -maltivec to be passed in order to handle altivec instructions.
> Getting this right was part of the cleanup that conflicted with the
> mpc52xx changes (Andrew: trying to take care of getting this into Linus'
> tree now).

Ah, ok, this is useful to know. Btw, I compiled linux 2.6.7 with gcc 3.4.1
and binutils 2.15 without problems.

--
Giuliano.