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SubjectRe: [RFC] kbuild - introduce vdir to make life easier for x86_64
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Sam,

On Mon, 2007-09-10 at 22:34 +0200, Sam Ravnborg wrote:
> Partly so. Took a look at the x86 tree.
> The main Makefile are at least not merged. Neither are pci/Makefile not
> boot/compressed/Makefile.

Yeah I know. Those are the non trivial ones and the boot/compressed one
might be split forever. The pci Makefile has link order problems
(initcall order wreckage) and the main Makefile as well. Needs more
thought.

> And some of the rest of the Makefiles are not pretty with the huge arch
> specific sections ifdeffed out.

I completely agree.

> -ifneq ($(CONFIG_ACPI_PROCESSOR),)
> -obj-y += cstate.o processor.o
> -endif
> +obj-$(CONFIG_X86_32)-if-$(CONFIG_ACPI_SLEEP) += sleep_32.o wakeup_32.o
> +obj-$(CONFIG_X86_64)-if-$(CONFIG_ACPI_SLEEP) += sleep_64.o wakeup_64.o
> +
> +obj-y-if-$(CONFIG_ACPI_PROCESSOR) += cstate.o processor.o
>
>
> My biggest worry is that we end up with a more compact format
> but only me (and a very few others) can read it.
> But I think the above could make the x86 Makefiles more readable
> as a whole.

It's way better than the ifneq(...) stuff and completely understandable
at least for me. I'd like to see that change, it is helpful on a bunch
of other places in the kernel as well.

Thanks,

tglx


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