powerpc allnoconfig

powerpc allnoconfig

[Andrew Morton]

make mrproper
make allnoconfig
make vmlinux

gives:

scripts/kconfig/conf -s arch/powerpc/Kconfig
  CHK     include/linux/version.h
  UPD     include/linux/version.h
  CHK     include/linux/utsrelease.h
  UPD     include/linux/utsrelease.h
  SYMLINK include/asm -> include/asm-powerpc
  HOSTCC  scripts/ihex2fw
  HOSTCC  scripts/kallsyms
  HOSTCC  scripts/conmakehash
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
scripts/mod/empty.c:1: error: -m64 requires a PowerPC64 cpu
make[2]: *** [scripts/mod/empty.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [scripts/mod] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [scripts] Error 2

Re: powerpc allnoconfig

[Michael Neuling]

> make mrproper
> make allnoconfig
> make vmlinux
> 
> gives:
> 
> scripts/kconfig/conf -s arch/powerpc/Kconfig
>   CHK     include/linux/version.h
>   UPD     include/linux/version.h
>   CHK     include/linux/utsrelease.h
>   UPD     include/linux/utsrelease.h
>   SYMLINK include/asm -> include/asm-powerpc
>   HOSTCC  scripts/ihex2fw
>   HOSTCC  scripts/kallsyms
>   HOSTCC  scripts/conmakehash
>   CC      scripts/mod/empty.o
>   HOSTCC  scripts/mod/mk_elfconfig
> scripts/mod/empty.c:1: error: -m64 requires a PowerPC64 cpu
> make[2]: *** [scripts/mod/empty.o] Error 1
> make[2]: *** Waiting for unfinished jobs....
> make[1]: *** [scripts/mod] Error 2
> make[1]: *** Waiting for unfinished jobs....
> make: *** [scripts] Error 2

I can't replicate this with Linus' latest tree with gcc 4.3 or 4.0.

What's your tool chain?  Does it compile 32 or 64bit by default?

Mikey

Re: powerpc allnoconfig

[Andrew Morton]

On Tue, 03 Mar 2009 13:31:10 +1100 Michael Neuling <mikey@neuling.org> wrote:

> > make mrproper
> > make allnoconfig
> > make vmlinux
> > 
> > gives:
> > 
> > scripts/kconfig/conf -s arch/powerpc/Kconfig
> >   CHK     include/linux/version.h
> >   UPD     include/linux/version.h
> >   CHK     include/linux/utsrelease.h
> >   UPD     include/linux/utsrelease.h
> >   SYMLINK include/asm -> include/asm-powerpc
> >   HOSTCC  scripts/ihex2fw
> >   HOSTCC  scripts/kallsyms
> >   HOSTCC  scripts/conmakehash
> >   CC      scripts/mod/empty.o
> >   HOSTCC  scripts/mod/mk_elfconfig
> > scripts/mod/empty.c:1: error: -m64 requires a PowerPC64 cpu
> > make[2]: *** [scripts/mod/empty.o] Error 1
> > make[2]: *** Waiting for unfinished jobs....
> > make[1]: *** [scripts/mod] Error 2
> > make[1]: *** Waiting for unfinished jobs....
> > make: *** [scripts] Error 2
> 
> I can't replicate this with Linus' latest tree with gcc 4.3 or 4.0.

ho hum.

> What's your tool chain?  Does it compile 32 or 64bit by default?

It's a cross-compiler: http://userweb.kernel.org/~akpm/cross-compilers/

Here's a `make V=1':

rm -f include/config/kernel.release
echo 2.6.29-rc6 > include/config/kernel.release
set -e; : '  CHK     include/linux/version.h'; mkdir -p include/linux/; 	(echo \#define LINUX_VERSION_CODE 132637; echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) < /usr/src/25/Makefile > include/linux/version.h.tmp; if [ -r include/linux/version.h ] && cmp -s include/linux/version.h include/linux/version.h.tmp; then rm -f include/linux/version.h.tmp; else : '  UPD     include/linux/version.h'; mv -f include/linux/version.h.tmp include/linux/version.h; fi
set -e; : '  CHK     include/linux/utsrelease.h'; mkdir -p include/linux/; 	if [ `echo -n "2.6.29-rc6" | wc -c ` -gt 64 ]; then echo '"2.6.29-rc6" exceeds 64 characters' >&2; exit 1; fi; (echo \#define UTS_RELEASE \"2.6.29-rc6\";) < include/config/kernel.release > include/linux/utsrelease.h.tmp; if [ -r include/linux/utsrelease.h ] && cmp -s include/linux/utsrelease.h include/linux/utsrelease.h.tmp; then rm -f include/linux/utsrelease.h.tmp; else : '  UPD     include/linux/utsrelease.h'; mv -f include/linux/utsrelease.h.tmp include/linux/utsrelease.h; fi
set -e; if [ -L include/asm ]; then asmlink=`readlink include/asm | cut -d '-' -f 2`; if [ "$asmlink" != "powerpc" ]; then echo "ERROR: the symlink include/asm points to asm-$asmlink but asm-powerpc was expected"; echo "       set ARCH or save .config and run 'make mrproper' to fix it"; exit 1; fi; test -e $asmlink || rm include/asm; elif [ -d include/asm ]; then echo "ERROR: include/asm is a directory but a symlink was expected"; exit 1; fi
make -f scripts/Makefile.build obj=scripts/basic
if [ ! -L include/asm ]; then : '  SYMLINK include/asm -> include/asm-powerpc'; if [ ! -d include/asm-powerpc ]; then mkdir -p include/asm-powerpc; fi; ln -fsn asm-powerpc include/asm; fi
mkdir -p .tmp_versions 
make -f scripts/Makefile.build obj=scripts
make -f scripts/Makefile.build obj=scripts/mod
  /opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/bin/powerpc64-unknown-linux-gnu-gcc -Wp,-MD,scripts/mod/.empty.o.d  -nostdinc -isystem /opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/lib/gcc/powerpc64-unknown-linux-gnu/4.1.0/./include -Iinclude  -I/usr/src/25/arch/powerpc/include -include include/linux/autoconf.h -D__KERNEL__ -Iarch/powerpc -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -O2 -msoft-float -pipe -Iarch/powerpc -ffixed-r2 -mmultiple -mno-altivec -mno-spe -mspe=no -funit-at-a-time -mno-string -mcpu=powerpc -Wa,-maltivec -fno-stack-protector -fomit-frame-pointer -Wdeclaration-after-statement -Wno-pointer-sign  -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(empty)"  -D"KBUILD_MODNAME=KBUILD_STR(empty)"  -c -o scripts/mod/empty.o scripts/mod/empty.c
scripts/mod/empty.c:1: error: -m64 requires a PowerPC64 cpu
make[2]: *** [scripts/mod/empty.o] Error 1
make[1]: *** [scripts/mod] Error 2
make: *** [scripts] Error 2
**FAILED**

Re: powerpc allnoconfig

[Stephen Rothwell]

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Hi Andrew,

On Mon, 2 Mar 2009 18:40:49 -0800 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> It's a cross-compiler: http://userweb.kernel.org/~akpm/cross-compilers/

What does
"/opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/bin/powerpc64-unknown-linux-gnu-gcc -v" say?

I suspect you have a 64 bit only compiler and allnoconfig produces a 32
bit kernel.  Is this a new error?

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

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Re: powerpc allnoconfig

[Andrew Morton]

On Tue, 3 Mar 2009 13:52:03 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi Andrew,
> 
> On Mon, 2 Mar 2009 18:40:49 -0800 Andrew Morton <akpm@linux-foundation.org> wrote:
> >
> > It's a cross-compiler: http://userweb.kernel.org/~akpm/cross-compilers/
> 
> What does
> "/opt/crosstool/gcc-4.1.0-glibc-2.3.6/powerpc64-unknown-linux-gnu/bin/powerpc64-unknown-linux-gnu-gcc -v" say?

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.

Re: powerpc allnoconfig

[Stephen Rothwell]

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Hi Andrew,

On Mon, 2 Mar 2009 18:55:14 -0800 Andrew Morton <akpm@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).  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 :-)
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

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Re: powerpc allnoconfig

[Andrew Morton]

On Tue, 3 Mar 2009 14:19:05 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi Andrew,
> 
> On Mon, 2 Mar 2009 18:55:14 -0800 Andrew Morton <akpm@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.

It seems odd that it breaks an allnoconfig build, whereas defconfig and
allmodconfig are OK.

Re: powerpc allnoconfig

[Stephen Rothwell]

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Hi Andrew,

On Mon, 2 Mar 2009 20:08:09 -0800 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> > 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.

Ah, ok.

> > let us know if that works :-)
> 
> didn't.  Oh well.

Rats!

I think we need a better bug report :-)
Kernel version? What error do you get now?

It works for me:

$ /home/sfr/kernels/cross/bin/powerpc64-linux-gcc -v
Using built-in specs.
Target: powerpc64-linux
Configured with: /home/sfr/kernels/tools/gcc-4.3.2/configure --target=powerpc64-linux --enable-targets=all --prefix=/home/sfr/kernels/cross --with-mpfr=/usr --enable-languages=c --without-headers --enable-sjlj-exceptions --with-system-libunwind --disable-nls --disable-threads --disable-shared --disable-libmudflap --disable-libssp --disable-libgomp --disable-decimal-float --enable-checking=release
Thread model: single
gcc version 4.3.2 (GCC) 
$ git describe --all
tags/next-20090302

also Linus' recent tree works:

$ git describe
v2.6.29-rc6-216-g778ef1e

> It seems odd that it breaks an allnoconfig build, whereas defconfig and
> allmodconfig are OK.

allmodconfig and defconfig turn CONFIG_PPC64 on.  allnoconfig turns it
off so you are trying to build a 32 bit kernel with a 64 bit compiler.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

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Re: powerpc allnoconfig

[Andrew Morton]

On Tue, 3 Mar 2009 15:40:43 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi Andrew,
> 
> On Mon, 2 Mar 2009 20:08:09 -0800 Andrew Morton <akpm@linux-foundation.org> wrote:
> >
> > > 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.
> 
> Ah, ok.
> 
> > > let us know if that works :-)
> > 
> > didn't.  Oh well.
> 
> Rats!
> 
> I think we need a better bug report :-)
> Kernel version?

Current mainline.

> What error do you get now?

Same as before.

> allmodconfig and defconfig turn CONFIG_PPC64 on.  allnoconfig turns it
> off so you are trying to build a 32 bit kernel with a 64 bit compiler.

Oh.  Well that will tear it.

How does one prepare a powerpc64 allnoconfig?

Re: powerpc allnoconfig

[Stephen Rothwell]

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Hi Andrew,

On Mon, 2 Mar 2009 21:38:01 -0800 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> > I think we need a better bug report :-)
> > Kernel version?
> 
> Current mainline.
> 
> > What error do you get now?
> 
> Same as before.
> 
> > allmodconfig and defconfig turn CONFIG_PPC64 on.  allnoconfig turns it
> > off so you are trying to build a 32 bit kernel with a 64 bit compiler.
> 
> Oh.  Well that will tear it.
> 
> How does one prepare a powerpc64 allnoconfig?

Like above.

See this is what happens for me:

$ git describe
v2.6.29-rc6-305-g2450cf5
$ /home/sfr/kernels/cross/bin/powerpc64-linux-gcc -v
Using built-in specs.
Target: powerpc64-linux
Configured with: /home/sfr/kernels/tools/gcc-4.3.2/configure --target=powerpc64-linux --enable-targets=all --prefix=/home/sfr/kernels/cross --with-mpfr=/usr --enable-languages=c --without-headers --enable-sjlj-exceptions --with-system-libunwind --disable-nls --disable-threads --disable-shared --disable-libmudflap --disable-libssp --disable-libgomp --disable-decimal-float --enable-checking=release
Thread model: single
gcc version 4.3.2 (GCC) 
$ mkdir ../powerpc_allnoconfig
$ echo CONFIG_PPC64=y >../powerpc64_allnoconfig
$ KCONFIG_ALLCONFIG=../powerpc64_allnoconfig make O=../powerpc_allnoconfig ARCH=powerpc CROSS_COMPILE=/home/sfr/kernels/cross/bin/powerpc64-linux- allnoconfig
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/basic/docproc
  HOSTCC  scripts/basic/hash
  GEN     /home/sfr/kernels/powerpc_allnoconfig/Makefile
  HOSTCC  scripts/kconfig/conf.o
  HOSTCC  scripts/kconfig/kxgettext.o
  SHIPPED scripts/kconfig/zconf.tab.c
  SHIPPED scripts/kconfig/lex.zconf.c
  SHIPPED scripts/kconfig/zconf.hash.c
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
scripts/kconfig/conf -n arch/powerpc/Kconfig
#
# configuration written to .config
#
$ make O=../powerpc_allnoconfig ARCH=powerpc CROSS_COMPILE=/home/sfr/kernels/cross/bin/powerpc64-linux- vmlinux
  GEN     /home/sfr/kernels/powerpc_allnoconfig/Makefile
scripts/kconfig/conf -s arch/powerpc/Kconfig
  Using /home/sfr/kernels/work as source for kernel
  GEN     /home/sfr/kernels/powerpc_allnoconfig/Makefile
  CHK     include/linux/version.h
  UPD     include/linux/version.h
  CHK     include/linux/utsrelease.h
  UPD     include/linux/utsrelease.h
  SYMLINK include/asm -> include/asm-powerpc
  CC      kernel/bounds.s
  GEN     include/linux/bounds.h
  CC      arch/powerpc/kernel/asm-offsets.s
  GEN     include/asm/asm-offsets.h
  CALL    /home/sfr/kernels/work/scripts/checksyscalls.sh
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/file2alias.o
	.
	.
	.
  CC      kernel/sysctl.o
/home/sfr/kernels/work/kernel/sysctl.c:103: warning: 'one' defined but not used
	.
	.
	.
  LD      vmlinux.o
  MODPOST vmlinux.o
WARNING: modpost: Found 2 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
  GEN     .version
  CHK     include/linux/compile.h
  UPD     include/linux/compile.h
  CC      init/version.o
  LD      init/built-in.o
  LD      .tmp_vmlinux1
  KSYM    .tmp_kallsyms1.S
  AS      .tmp_kallsyms1.o
  LD      .tmp_vmlinux2
  KSYM    .tmp_kallsyms2.S
  AS      .tmp_kallsyms2.o
  LD      vmlinux
  SYSMAP  System.map
  SYSMAP  .tmp_System.map
$ grep CONFIG_PPC64 ../powerpc_allnoconfig/.config
CONFIG_PPC64=y
$ file ../powerpc_allnoconfig/vmlinux
../powerpc_allnoconfig/vmlinux: ELF 64-bit MSB executable, 64-bit PowerPC or cisco 7500, version 1 (SYSV), statically linked, not stripped

So, I can only imagine it is your toolchain that is letting you down.
What is your host machine?  Can I send you a new toolchain? (Mine are only
good for building kernels - they have no libraries - they are build by a
script I got from Segher Boessenkool.)

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

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Re: powerpc allnoconfig

[Andrew Morton]

On Tue, 3 Mar 2009 17:22:32 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> So, I can only imagine it is your toolchain that is letting you down.

hrm.  I blame Rusty.

> What is your host machine?

x86_64/FCx

>  Can I send you a new toolchain? (Mine are only
> good for building kernels - they have no libraries - they are build by a
> script I got from Segher Boessenkool.)

It's OK - I don't really care and as long as it's OK on a realistic
build setup, I guess we're good.

Re: powerpc allnoconfig

[Geert Uytterhoeven]

On Mon, 2 Mar 2009, Andrew Morton wrote:
> On Tue, 3 Mar 2009 14:19:05 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> > On Mon, 2 Mar 2009 18:55:14 -0800 Andrew Morton <akpm@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
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium

Phone:    +32 (0)2 700 8453
Fax:      +32 (0)2 700 8622
E-mail:   Geert.Uytterhoeven@sonycom.com
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Re: powerpc allnoconfig

[Andrew Morton]

On Tue, 3 Mar 2009 11:14:04 +0100 (CET) Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> wrote:

> > > 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"

Nope:

scripts/mod/empty.c:1: error: -m64 requires a PowerPC64 cpu

I have a 32-bit-only gcc and `allnoconfig' secretly switches your
CPU from 64-bit to 32-bit.

Re: powerpc allnoconfig

[Peter Bergner]

On Tue, 2009-03-03 at 08:56 -0800, Andrew Morton wrote:
> On Tue, 3 Mar 2009 11:14:04 +0100 (CET) Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> wrote:
> 
> > > > 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"
> 
> Nope:
> 
> scripts/mod/empty.c:1: error: -m64 requires a PowerPC64 cpu

To build a biarch compiler that defaults to 32-bit, try adding the
option --with-cpu=default32 to your GCC configure options.  You also
shouldn't need --enable-targets=all.  We haven't used that option
for ages when building powerpc64-linux enabled GCCs.

Peter