kernel build fails with 12.04 and 12.05 toolchain released

Thank you report the issue. But I can not reproduce it with the following steps:

export ARCH=arm
export CROSS_COMPILE=.../gcc-linaro-arm-linux-gnueabihf-2012.05-20120523_linux/bin/arm-linux-gnueabihf-
make omap2plus_defconfig
make uImage -j4 V=1

Logs show there is no error and I can get a vmlinux.

Would you please give more instructions to reproduce it?

On Mon, Jun 4, 2012 at 3:25 PM, Zhenqiang Chen
<email address hidden>wrote:

> Thank you report the issue. But I can not reproduce it with the
> following steps:
>
> export ARCH=arm
> export
> CROSS_COMPILE=.../gcc-linaro-arm-linux-gnueabihf-2012.05-20120523_linux/bin/arm-linux-gnueabihf-
> make omap2plus_defconfig
> make uImage -j4 V=1
>
> Logs show there is no error and I can get a vmlinux.
>
> Would you please give more instructions to reproduce it?
>

Well the above instructions work. But if I try to do something like the
following I get the compilation error mentioned previously

make ARCH=arm clean mrproper
make ARCH=arm
CROSS_COMPILE='~/work/kernel/gcc_4.7/gcc-linaro-arm-linux-gnueabi-2012.04-20120426_linux/bin/arm-linux-gnueabi-'
omap2plus_defconfig
echo 'CONFIG_ARCH_OMAP2=n' >> .config
echo 'CONFIG_THUMB2_KERNEL=y' >> .config
yes '' |make ARCH=arm oldconfig
 make ARCH=arm
CROSS_COMPILE='~/work/kernel/gcc_4.7/gcc-linaro-arm-linux-gnueabi-2012.04-20120426_linux/bin/arm-linux-gnueabi-'
-j4 uImage

> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1007353
>
> Title:
> kernel build fails with 12.04 and 12.05 toolchain released
>
> Status in Linaro Toolchain Binaries:
> New
>
> Bug description:
> Hi,
>
> The kernel build for linux-linaro-tracking tree (linux-linaro branch)
> with the latest released 12.04 and 12.05 gcc binaries fails with the
> following error:
>
> CC arch/arm/boot/compressed/decompress.o
> /mnt/ci_build/workspace/linux-linaro-tracking_panda-omap2plus_sandbox_job/arch/arm/boot/compressed/head.S:
> Assembler messages:
> /mnt/ci_build/workspace/linux-linaro-tracking_panda-omap2plus_sandbox_job/arch/arm/boot/compressed/head.S:127:
> Error: selected processor does not support requested special purpose
> register -- `mrs r2,cpsr'
> /mnt/ci_build/workspace/linux-linaro-tracking_panda-omap2plus_sandbox_job/arch/arm/boot/compressed/head.S:134:
> Error: selected processor does not support requested special purpose
> register -- `mrs r2,cpsr'
> /mnt/ci_build/workspace/linux-linaro-tracking_panda-omap2plus_sandbox_job/arch/arm/boot/compressed/head.S:136:
> Error: selected processor does not support requested special purpose
> register -- `msr cpsr_c,r2'
> make[3]: *** [arch/arm/boot/compressed/head.o] Error 1
> make[3]: *** Waiting for unfinished jobs....
> make[2]: *** [arch/arm/boot/compressed/vmlinux] Error 2
> make[1]: *** [uImage] Error 2
> make: *** [sub-make] Error 2
>
> The build was executed on a precise ec2 instance. Here is the link to
> the complete failure log: https://ci.linaro.org/jenkins/job/linux-
> linaro-tracking_panda-omap2plus_sandbox_job/78/console.
>
> Regards,
> Deepti.
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/linaro-toolchain-binaries/+bug/1007353/+subscriptions
>

--
Thanks and Regards,
Deepti

Thank you! I can reproduce it with the new config.

Hmm, this is:
 http://sourceware.org/bugzilla/show_bug.cgi?id=12698

which was fixed in mid 2011 in commit 6413e2b47bbbcfe1f4d5df11a4472ccd9a85b78d. This is included in the 2.22 that we ship.

This reduces to:

michaelh@crucis:~$ arm-linux-gnueabi-as --gdwarf2 -EL -march=armv7-a -mfloat-abi=soft -mfpu=vfpv3-d16 -meabi=5 -mimplicit-it=always -mno-warn-deprecated -mthumb -march=all -o head.o head2.s
head2.s: Assembler messages:
head2.s:60: Error: selected processor does not support requested special purpose register -- `mrs r2,cpsr'
head2.s:67: Error: selected processor does not support requested special purpose register -- `mrs r2,cpsr'
head2.s:69: Error: selected processor does not support requested special purpose register -- `msr cpsr_c,r2'

The fault occurs in 2.22 and current trunk.

The fault seems to be in gas/config/tc-arm.c:11203:

if (ARM_CPU_HAS_FEATURE (selected_cpu, arm_ext_m))

This needs to go upstream.

Yip. Two functions need fix after "if (ARM_CPU_HAS_FEATURE (selected_cpu, arm_ext_m))".

do_t_msr
do_t_mrs

I will create similar workaround patch as http://sourceware.org/bugzilla/show_bug.cgi?id=12698

Reopen http://sourceware.org/bugzilla/show_bug.cgi?id=12698 and create a reference patch for it.

Zhenqiang, could you drive this?

Where can I get the latest gcc binary containing the fix.
http://releases.linaro.org/12.06/components/toolchain/gcc-linaro/4.7/gcc-linaro-4.7-2012.06.tar.bz2 is the location for the same ?

No. It is the source tarball. The 2012.06 binary toolchain is not released yet.

In general, we release the binary toolchain at the last week of a month.

To verify it, you can try an internal build at: http://people.linaro.org/~zhenqiangchen/gcc-linaro-arm-linux-gnueabihf-2012.06-20120528+bzr2438_linux.tar.bz2.

I have verified that the http://people.linaro.org/~zhenqiangchen/gcc-linaro-arm-linux-gnueabihf-2012.06-20120528+bzr2438_linux.tar.bz2 and it works.

But, I dont see anything under http://releases.linaro.org/12.06/components/toolchain/binaries/ dir.
when can I get the gcc binary on releases.linaro.org ?

Thanks!!!
Deepti

The linux toolchain is: gcc-linaro-arm-linux-gnueabihf-2012.06-20120625_linux.tar.bz2

You can get it from
  http://releases.linaro.org/12.06/components/toolchain/binaries/
or
  https://launchpad.net/linaro-toolchain-binaries/+download

Yup, Fathi was in the process of uploading the binaries to r.l.o when I replied.
I see the binaries now on r.l.o and I tested it with my CI job using the http://releases.linaro.org/12.06/components/toolchain/binaries/gcc-linaro-arm-linux-gnueabihf-2012.06-20120625_linux.tar.bz2 binary and it works now.
Here is the test job which passes now https://ci.linaro.org/jenkins/job/linux-linaro-tracking_panda-omap2plus_sandbox_job/84/consoleFull.

Thanks!!!
Deepti.