O= compilation failure in 2.6.21-rc

[Milton Miller]

On Thu Mar 22 03:17:28 EST 2007, Christoph Hellwig wrote:
> looks like 2.6.21-rc4 doesn't compile anymore when using objdir !=
> srcdir.  The message is:
> 
> WRAP    arch/powerpc/boot/zImage.pseries
> powerpc64-linux-ld: cannot open linker script file
> arch/powerpc/boot/zImage.lds: No such file or directory
> arch/powerpc/boot/zImage.pseries: No such file or directory
> 
> works fine for either building in the source dir or just doing a make
> vmlinux instead of make so that the zImage wrapper isn't built.


Works for me.

unpack 2.6.24-rc4
mkdir obj_4k
make pseries_defconfig O=obj_4k/
make zImage O=obj_4k/

..
  BOOTCC  arch/powerpc/boot/of.o
  BOOTCC  arch/powerpc/boot/empty.o
  HOSTCC  arch/powerpc/boot/addnote
  HOSTCC  arch/powerpc/boot/hack-coff
  HOSTCC  arch/powerpc/boot/mktree
  WRAP    arch/powerpc/boot/zImage.pseries

[no complaints]

In additon, here is the dependency chain in arch/powerpc/boot/Makefile
from the wrapper invocation to the generation of zImage.lds:


$(obj)/zImage:          $(addprefix $(obj)/, $(image-y))

$(obj)/zImage.pseries:  vmlinux $(wrapperbits)
        $(call cmd,wrap,pseries)

wrapperbits     := $(extra-y) $(addprefix $(obj)/,addnote hack-coff mktree)

extra-y         := $(obj)/crt0.o $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
                   $(obj)/zImage.lds $(obj)/zImage.coff.lds

$(obj)/zImage.lds $(obj)/zImage.coff.lds: $(obj)/%: $(srctree)/$(src)/%.S
        @cp $< $@



So either your tree is broken, cp is broken, or you need to provide more
information.

milton