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Re: [XEN PATCH v7 00/51] xen: Build system improvements, now with out-of-tree build!
- To: Alex Bennée <alex.bennee@xxxxxxxxxx>
- From: Anthony PERARD <anthony.perard@xxxxxxxxxx>
- Date: Thu, 4 Nov 2021 16:34:41 +0000
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Ian Jackson <iwj@xxxxxxxxxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Bob Eshleman <bobbyeshleman@xxxxxxxxx>, Alistair Francis <alistair.francis@xxxxxxx>, "Tim Deegan" <tim@xxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>, Tamas K Lengyel <tamas@xxxxxxxxxxxxx>, Doug Goldstein <cardoe@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, "Julien Grall" <julien@xxxxxxx>, Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx>, "Stefano Stabellini" <sstabellini@xxxxxxxxxx>, Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>, Petre Pircalabu <ppircalabu@xxxxxxxxxxxxxxx>, Paul Durrant <paul@xxxxxxx>, Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Wei Liu <wl@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Lukasz Hawrylko <lukasz.hawrylko@xxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 04 Nov 2021 16:34:59 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Thu, Nov 04, 2021 at 03:49:36PM +0000, Alex Bennée wrote:
>
> Anthony PERARD <anthony.perard@xxxxxxxxxx> writes:
>
> > Patch series available in this git branch:
> > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fxenbits.xen.org%2Fgit-http%2Fpeople%2Faperard%2Fxen-unstable.git&data=04%7C01%7Canthony.perard%40citrix.com%7C85bb0d32a72542aa9f6108d99fad9607%7C335836de42ef43a2b145348c2ee9ca5b%7C0%7C0%7C637716390172120458%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=WWS4yPu9%2BJxBkBiM5SBrH7kDtHkUzMGuKSSdPcgEYII%3D&reserved=0
> > br.build-system-xen-v7
> >
> > v7:
> > Out-of-tree build!
> >
> > This mean many more patches. Everything after patch 27 is new.
> >
> > There's a few new patch before that, but otherwise are rework of
> > v6.
>
> This is something I've been looking forward to but obviously my QEMU
> focused mind meant I did it wrong. Generally I create a builds subdir in
> my tree with subdirs for each build flavour. So with:
>
> /home/alex/lsrc/xen/xen.git/builds/native
>
> And executing:
>
> ➜ ../../configure
Thanks for testing, but the patch series only focus on a subset of the
repository, that is the hypervisor "xen.git/xen/". The rest of xen.git
isn't ready for out-of-tree build unfortunately. A lot more work is
needed.
> In "build: adding out-of-tree support to the xen build" you describe the
> Linux kernel style which works well where the config can be done after
> the fact but I wonder if the configure approach is better suited to
> something that needs a bunch of checks running. Is the configure script
> pure autoconf? This should work out of the box IIRC.
"xen.git/xen/" does use a build system similar to Linux's, we use
Linux's Kconfig for example.
For the rest of the repository, it is indeed autoconf for the
configuration phase. So yes running ./configure would be mostly ok, but
it doesn't take care of Makefiles at the moment and I found one bug in
our autoconf macros. Beyond that, our Makefiles aren't ready.
xen.git isn't a single build system, they are several (at least one
foreach of xen/ stubdom/ tools/)
Cheers,
--
Anthony PERARD
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