Re: GCC-4 problems

[Mike F. <va...@ge...>]

On Saturday 07 July 2007, Manuel Lauss wrote:
> Paul Mundt wrote:
> > On Mon, Mar 19, 2007 at 09:27:57AM +0100, Manuel Lauss wrote:
> >> Also, these exports need to be removed from sh_ksyms.c, they give
> >> "undefined reference" errors:
> >> __sdivsi3_i4i __udiv_qrnnd_16 __udivsi3_i4i
> >
> > Ok, so removing these seems to be have created fallout all over the
> > place. Apparently it's just your GCC4 that seems to have problems with
> > these symbols, whereas the other ones really seem to want them. It looks
>
> Oh, sorry, that wasn't my intention at all.
>
> > like we're going to have to narrow it down to the exact release in which
> > they vanished (I would guess 4.1.2, since 4.1.1 still wants them).
> >
> > akpm also suggests he has a 3.4.5 toolchain that needs these, which is
> > also very unusual. Do you have a tarball of your compiler somewhere so
> > it's easier to debug?
>
> Prompted by your mail I reverted commit
> 9c5b406b9a857a67caf778f096bfc7f4e6b0401a and GCC builds the kernel
> just fine now; the only difference is that I've upgraded from 4.1.1 to
> 4.1.2 in the meantime.
>
> Compiler is made with Gentoo's "crossdev" tool, which AFAICT is vanilla
> 4.1.2 with a few bugfix patches applied (+ PR29599 fix for me)
> (see http://gentoo.inode.at/distfiles/gcc-4.1.2-patches-1.0.1.tar.bz2)
>
> I can rebuild gcc-4.1.1 which failed for me if you like.

ruh roh ... someone said Gentoo ;)

default gcc-4.x in Gentoo enables multilib for SuperH targets akin to gcc-3=
=2Ex=20
(since vanilla gcc-4.x does not include nofpu support by default)

to doubly verify, you can emerge gcc with USE=3Dvanilla ... that'll disable=
 the=20
Gentoo patchset ...
=2Dmike