patch to install unstripped vDSO on disk breaks powerpc kernel build

["Chris Friesen" <cfriesen@nortel.com>]

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 <roland@redhat.com>
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 <roland@redhat.com>
     Cc: Sam Ravnborg <sam@ravnborg.org>
     Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
     Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
     Signed-off-by: Paul Mackerras <paulus@samba.org>



Anyone have any idea what's going on?


Thanks,

Chris