mainline: misc.o uses VFP instructions error

mainline: misc.o uses VFP instructions error

[Kalle Valo]

Hello,

I'm trying to compile omap_generic_2420_defconfig in mainline and I get
this error:

  Kernel: arch/arm/boot/Image is ready
  LD      arch/arm/boot/compressed/vmlinux
arm-linux-ld: ERROR: arch/arm/boot/compressed/misc.o uses VFP
  instructions, whereas arch/arm/boot/compressed/vmlinux does not
arm-linux-ld: failed to merge target specific data of file
  arch/arm/boot/compressed/misc.o

Here are the exact commands I used:

make ARCH=arm CROSS_COMPILE=arm-linux- clean
make ARCH=arm CROSS_COMPILE=arm-linux- mrproper
make ARCH=arm CROSS_COMPILE=arm-linux- omap_generic_2420_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux- -j 2

The compiler and linker used:

$ arm-linux-gcc -v
Using built-in specs.
Target: arm-none-eabi
Configured with: /scratch/julian/lite-respin/eabi/src/gcc-4.3/configure
--build=i686-pc-linux-gnu --host=i686-pc-linux-gnu
--target=arm-none-eabi --enable-threads --disable-libmudflap
--disable-libssp --disable-libstdcxx-pch --with-gnu-as --with-gnu-ld
--enable-languages=c,c++ --disable-shared --with-newlib
--with-pkgversion='Sourcery G++ Lite 2008q3-66'
--with-bugurl=https://support.codesourcery.com/GNUToolchain/
--disable-nls --prefix=/opt/codesourcery --with-headers=yes
--with-sysroot=/opt/codesourcery/arm-none-eabi
--with-build-sysroot=/scratch/julian/lite-respin/eabi/install/arm-none-eabi
--with-gmp=/scratch/julian/lite-respin/eabi/obj/host-libs-2008q3-66-arm-none-eabi-i686-pc-linux-gnu/usr
--with-mpfr=/scratch/julian/lite-respin/eabi/obj/host-libs-2008q3-66-arm-none-eabi-i686-pc-linux-gnu/usr
--disable-libgomp --enable-poison-system-directories
--with-build-time-tools=/scratch/julian/lite-respin/eabi/install/arm-none-eabi/bin
--with-build-time-tools=/scratch/julian/lite-respin/eabi/install/arm-none-eabi/bin
Thread model: single
gcc version 4.3.2 (Sourcery G++ Lite 2008q3-66) 
$ arm-linux-ld -v
GNU ld (Sourcery G++ Lite 2008q3-66) 2.18.50.20080215
$ 

The commit in question is 746a99a5af6 (2.6.31-rc1 plus something on top)
from Linus' tree. 

Any ideas why this is happening? The same toolchain has worked fine with
n800 code in linux-omap.

-- 
Kalle Valo

Re: mainline: misc.o uses VFP instructions error

[Kalle Valo]

On Sat, Jul 4, 2009 at 6:12 PM, Kalle Valo<kalle.valo@iki.fi> wrote:
> I'm trying to compile omap_generic_2420_defconfig in mainline and I get
> this error:
>
>  Kernel: arch/arm/boot/Image is ready
>  LD      arch/arm/boot/compressed/vmlinux
> arm-linux-ld: ERROR: arch/arm/boot/compressed/misc.o uses VFP
>  instructions, whereas arch/arm/boot/compressed/vmlinux does not
> arm-linux-ld: failed to merge target specific data of file
>  arch/arm/boot/compressed/misc.o

I tried omap3_beagle_defconfig and it compiled without errors. I found
discussion about the error here:

http://www.spinics.net/lists/arm-kernel/msg59073.html

And reverting this commit fixed the issue with omap_generic_2420_defconfig:

commit 80cec14a83ad0ad109d822b3f3482a379bc481ba
Author: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date:   Tue Sep 9 13:56:45 2008 +0100

    [ARM] Add -march=all to assembly file build in arch/arm/boot/compressed

    This allows assembly files to be crafted to cover all ARM CPU types
    rather than erroring out on instructions only in later CPUs.  We
    are careful in these files to only execute CPU specific code when
    the CPU ID says we can.

    Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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