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Re: [XEN PATCH 15/15] build: remove Config.mk include from Rules.mk
- To: Anthony PERARD <anthony.perard@xxxxxxxxxx>
- From: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- Date: Wed, 24 May 2023 10:27:28 +0000
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- Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Wed, 24 May 2023 10:28:02 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-index: AQHZjZZcR9VZERXJ80eRAbM26/D8DK9pOXQA
- Thread-topic: [XEN PATCH 15/15] build: remove Config.mk include from Rules.mk
> On 23 May 2023, at 17:38, Anthony PERARD <anthony.perard@xxxxxxxxxx> wrote:
>
> Everything needed to build the hypervisor should already be configured
> by "xen/Makefile", thus Config.mk shouldn't be needed.
>
> Then, Config.mk keeps on testing support of some CFLAGS with CC, the
> result of this testing is not used at this stage so the build is
> slowed unnecessarily.
>
> Likewise, GCC is checked to be at the minimum at 4.2 when entering
> every sub-directory, so the check have run countless time at this
> stage.
>
> We only need to export a few more configuration variables. And add
> some variables in Kbuild.include, and macro fallbacks for Make older
> than 3.81. (Adding `or` just in case. it's only used in xen/Makefile,
> which includes Config.mk and so has already the fallback.)
>
> Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
> ---
Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx>
Tested-by: Luca Fancellu <luca.fancellu@xxxxxxx>
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