patch to install unstripped vDSO on disk breaks powerpc kernel build

I'm using gcc 3.4.3 and binutils 2.15.92.0.2.  I originally saw the following problem in 2.6.25 but it's present in git head as well:

  CALL /home/cfriesen/kernels/2.6.25/linux-2.6.25/scripts/checksyscalls.sh
  CHK     include/linux/compile.h
  CALL /home/cfriesen/kernels/2.6.25/linux-2.6.25/arch/powerpc/kernel/systbl_chk.sh
  AS      arch/powerpc/kernel/systbl.o
  OBJCOPY arch/powerpc/kernel/vdso64/vdso64.so
BFD: arch/powerpc/kernel/vdso64/vdso64.so: The first section in the PT_DYNAMIC segment is not the .dynamic section
/home/cfriesen/bin/ppc64-R9a/bin/ppc64-R9a-objcopy: arch/powerpc/kernel/vdso64/vdso64.so: Bad value
BFD: arch/powerpc/kernel/vdso64/vdso64.so: The first section in the PT_DYNAMIC segment is not the .dynamic section
/home/cfriesen/bin/ppc64-R9a/bin/ppc64-R9a-objcopy: arch/powerpc/kernel/vdso64/vdso64.so: Bad value
make[3]: *** [arch/powerpc/kernel/vdso64/vdso64.so] Error 1
make[2]: *** [arch/powerpc/kernel/vdso64] Error 2
make[1]: *** [arch/powerpc/kernel] Error 2
make: *** [sub-make] Error 2



I installed git and bisected the problem.  It turns out that it's due to the following commit:


commit 8150caad02266623b5b9f58088d589f130fccd97
Author: Roland McGrath [off-list ref]
Date:   Tue Oct 2 13:30:04 2007 -0700

[POWERPC] powerpc vDSO: install unstripped copies on disk
This keeps an unstripped copy of the vDSO images built before they are stripped and embedded in the kernel.  The unstripped copies get installed in $(MODLIB)/vdso/ by "make install".  These files can be useful when they contain source-level debugging information.

    Signed-off-by: Roland McGrath [off-list ref]
    Cc: Sam Ravnborg [off-list ref]
    Cc: Benjamin Herrenschmidt [off-list ref]
    Signed-off-by: Andrew Morton [off-list ref]
    Signed-off-by: Paul Mackerras [off-list ref]



Anyone have any idea what's going on?


Thanks,

Chris