powerpc allnoconfig

[Geert Uytterhoeven]

On Mon, 2 Mar 2009, Andrew Morton wrote:
> On Tue, 3 Mar 2009 14:19:05 +1100 Stephen Rothwell <sfr at canb.auug.org.au> wrote:
> > On Mon, 2 Mar 2009 18:55:14 -0800 Andrew Morton <akpm at linux-foundation.org> wrote:
> > > Using built-in specs.
> > > Target: powerpc64-unknown-linux-gnu
> > > Configured with: /home/axboe/crosstool-0.43/build/powerpc64-unknown-linux-gnu/gcc-4.1.0-glibc-2.3.6/gcc-4.1.0/configure --target=powerpc64-unknown-linux-gnu --host=x86_64-host_unknown-linux-gnu --prefix=/opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu --disable-multilib --with-sysroot=/opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/powerpc64-unknown-linux-gnu/sys-root --with-local-prefix=/opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/powerpc64-unknown-linux-gnu/sys-root --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit --enable-languages=c --enable-shared --enable-c99 --enable-long-long
> > > Thread model: posix
> > > gcc version 4.1.0
> > > 
> > > > I suspect you have a 64 bit only compiler and allnoconfig produces a 32
> > > > bit kernel.  Is this a new error?
> > > 
> > > 2.6.28 does the same thing.  I don't recall having tested allnoconfig
> > > for ages if at all, so I don't know if it's a regression.
> > 
> > Right, you have a 64 bit only compiler. Also it is version 4.1.0 which we now black ban (I think).
> 
> Probably.  But I only use it for compilation testing, so the `Your
> version of gcc miscompiles the __weak directive' thing is a pointless
> PITA, so I patch it out.
> 
> >  You need to either build a biarch cross compiler (--enable-targets=all) or try:
> > 
> > $ cat >xxx <<EOF
> > CONFIG_PPC64=y
> > EOF
> > $ KCONFIG_ALLCONFIG=xxx make allnoconfig
> > $ make vmlinux
> > 
> > let us know if that works :-)
> 
> didn't.  Oh well.

Does allnoconfig work if you force the compiler to be 32-bit, like

    make CC="powerpc64-unknown-linux-gnu-gcc -m32"

? This is what I'm using to compile ppc32 kernels with the Cell SDK ppu-gcc43,
which defaults to -m64 (BTW, I also had to add "-mcpu=440" for gcc 4.3.2, which
I didn't need for the banned 4.1.1).

With kind regards,

Geert Uytterhoeven
Software Architect

Sony Techsoft Centre Europe
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