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Re: [XEN PATCH v8 00/47] xen: Build system improvements, now with out-of-tree build!
- To: Anthony PERARD <anthony.perard@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 21 Jan 2022 11:58:18 +0100
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- Cc: Wei Liu <wl@xxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Alistair Francis <alistair.francis@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Doug Goldstein <cardoe@xxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>, Bob Eshleman <bobbyeshleman@xxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Tamas K Lengyel <tamas@xxxxxxxxxxxxx>, Paul Durrant <paul@xxxxxxx>, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 21 Jan 2022 10:58:31 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 21.01.2022 11:34, Anthony PERARD wrote:
> On Fri, Jan 21, 2022 at 07:59:40AM +0100, Jan Beulich wrote:
>> One more question: With an out-of-tree build, where do I put the
>> (build flavor specific) ./.config (not xen/.config)? I'm using this
>> extensively for cross builds and to override tool chain components
>> (to avoid having to remember to always specify the right combination
>> for a certain flavor on the command line).
>
> You mean the optional ".config" that "Config.mk" includes? This file is
> still included as "$(XEN_ROOT)/.config", and XEN_ROOT is set to be the
> source tree.
It being taken from the source tree is precisely the issue.
> Maybe you could abuse a file named "xen-version" which is included near
> the top of "xen/Makefile" instead.
I don't think that would work. The settings from ./.config are
needed ahead of
include $(XEN_ROOT)/config/$(XEN_OS).mk
include $(XEN_ROOT)/config/$(XEN_TARGET_ARCH).mk
which come later in Config.mk, at least when e.g. config/StdGNU.mk
properly used ?= . Plus obviously for the 2nd of the lines above
to use the right file, XEN_TARGET_ARCH already needs to be set to
its designated value (same would of course be true for XEN_OS, if
one was to override that).
Jan
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