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Re: [Xen-devel] [PATCH v2] common: make sure symbols-dummy.o gets rebuilt when needed
- To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Fri, 23 Nov 2018 11:55:19 +0000
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>
- Delivery-date: Fri, 23 Nov 2018 11:55:26 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 23/11/2018 11:36, Jan Beulich wrote:
> The per-arch top level make files don't record any dependencies for the
> file, so its mere existence is enough for make to consider it up-to-
> date. As of ab3e5f5ff9 ("xsplice, symbols: Implement fast symbol names
> -> virtual addresses lookup") the file, however, depends on the
> FAST_SYMBOL_LOOKUP config option, which may change between incremental
> re-builds.
>
> Use the $(extra-y) machinery to get the file built without an extra
> recursion step into common/, but instead right when the other things in
> that directory get built. Some makefile adjustments are necessary to
> actually make this machinery work beyond the restricted set of place it
> was used in before. Note however that an important restriction remains:
> $(extra-y) may not overlap $(obj-y) or $(obj-bin-y).
>
> Take the opportunity and also make the gendep invocation cover both
> $(obj-bin-y) and $(extra-y), even if this is not directly related here.
> I should have included them right away in 8b6ef9c152 ("compat: enforce
> distinguishable file names in symbol table").
>
> Reported-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
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