[OE-core] binutils: regression on kernel builds

[Martin Jansa]

On Mon, Dec 10, 2012 at 12:48 PM, Enrico Scholz
<enrico.scholz at sigma-chemnitz.de> wrote:
> Hi,
>
> with recent binutils, kernel build fails with
>
> | arm-linux-gnueabi-ld: error: arch/arm/boot/compressed/piggy.gzip.o: unknown CPU architecture
>
> I am able to reproduce it with
>
> $ > /tmp/x.s
> $ arm-linux-gnueabi-as  -march=armv7-a -march=all -o x0.o /tmp/x.s
> $ arm-linux-gnueabi-as  -march=armv7-a  -o x1.o /tmp/x.s
> $ arm-linux-gnueabi-ld.gold x0.o x1.o
> arm-linux-gnueabi-ld: error: x1.o: unknown CPU architecture
> $ arm-linux-gnueabi-ld.bfd x0.o x1.o
> arm-linux-gnueabi-ld.bfd: warning: cannot find entry symbol _start; defaulting to 0000000000008034
>
>
> (kernel sets '-Wa,-march=all' when building piggy.gzip.o)
>
>
> This works fine with binutils 2.22 and when using the BFD linker.

You need to patch your kernel sources, some examples for different
kernel versions (please ignore incorrect commit message)

https://github.com/shr-distribution/linux/commit/e465ff7527fb085b4854b0e68aa6bc592229bf43
https://github.com/shr-distribution/linux/commit/627c638794d61c27858d6220cf55c27c74dc9450
https://github.com/shr-distribution/linux/commit/37b0bacc00e81811dc113265a9ef826fe9aab788
https://github.com/shr-distribution/linux/commit/ec1ac589d49081286164246fbaaba0012ae7ecac

Cheers,