Re: [Qemu-devel] [PATCH 2/2] build: get dependency file directories from object file names

["Andreas Färber" <afaerber@suse.de>]

Am 24.07.2012 13:43, schrieb Paolo Bonzini:
> Il 24/07/2012 13:38, Andreas Färber ha scritto:
>>>> +$(foreach var,$(nested-vars), $(eval \
>>>> +  -include $(addsuffix *.d, $(sort $(dir $($(var)))))))
>>>>  endef
>>>>
>> Are you sure? Dependencies are not guaranteed to be in one of the
>> unnested variables, thought we ran into some issues earlier... In
>> particular I'm thinking of tcg/*.d and of *.d in .user, .target, those
>> that are actually recursed into.
> 
> obj-y is a nested variable:
> 
>   nested-vars += obj-y
> 
>   # This resolves all nested paths, so it must come last
>   include $(SRC_PATH)/Makefile.objs
> 
> $(dir $(obj-y)) contains tcg/ and from there you get tcg/*.d.
> 
> The only makefile that doesn't use the nesting mechanism is tests/Makefile.

I think you misunderstood: My worry is

qemu-something: $(obj-y) foo bar baz

obj-y and friends are handled, foo, bar, baz are not. If you checked all
those cases, fine with me. :) Otherwise the new unnesting rule is fine,
but not all "*.d" inclusions could be deleted.

Andreas

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