linux-kernel - Re: [PATCH 00/12] Enable build system on macOS hosts

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Message-ID: <CAGsJ_4zA6=ajoOgAm9kweeiBFKz4TJxxjYFGHHd3HQY8dxHpWA@mail.gmail.com>
Date: Sat, 17 Aug 2024 13:11:11 +1200
From: Barry Song <21cnbao@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Daniel Gomez <da.gomez@...sung.com>, Masahiro Yamada <masahiroy@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 
	Lucas De Marchi <lucas.demarchi@...el.com>, 
	Thomas Hellström <thomas.hellstrom@...ux.intel.com>, 
	Rodrigo Vivi <rodrigo.vivi@...el.com>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
	William Hubbs <w.d.hubbs@...il.com>, Chris Brannon <chris@...-brannons.com>, 
	Kirk Reiser <kirk@...sers.ca>, Samuel Thibault <samuel.thibault@...-lyon.org>, 
	Paul Moore <paul@...l-moore.com>, Stephen Smalley <stephen.smalley.work@...il.com>, 
	Ondrej Mosnacek <omosnace@...hat.com>, Catalin Marinas <catalin.marinas@....com>, 
	Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>, 
	James Morse <james.morse@....com>, Suzuki K Poulose <suzuki.poulose@....com>, 
	Zenghui Yu <yuzenghui@...wei.com>, Jiri Slaby <jirislaby@...nel.org>, 
	Nick Desaulniers <ndesaulniers@...gle.com>, Bill Wendling <morbo@...gle.com>, 
	Justin Stitt <justinstitt@...gle.com>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>, 
	"intel-xe@...ts.freedesktop.org" <intel-xe@...ts.freedesktop.org>, 
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>, 
	"speakup@...ux-speakup.org" <speakup@...ux-speakup.org>, 
	"selinux@...r.kernel.org" <selinux@...r.kernel.org>, 
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, 
	"kvmarm@...ts.linux.dev" <kvmarm@...ts.linux.dev>, 
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>, 
	"llvm@...ts.linux.dev" <llvm@...ts.linux.dev>, Finn Behrens <me@...enk.dev>, 
	"Daniel Gomez (Samsung)" <d+samsung@...ces.com>, "gost.dev@...sung.com" <gost.dev@...sung.com>, 
	Nick Desaulniers <nick.desaulniers@...il.com>
Subject: Re: [PATCH 00/12] Enable build system on macOS hosts

On Thu, Aug 8, 2024 at 2:20 AM Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> On Wed, Aug 07, 2024 at 01:56:38PM +0000, Daniel Gomez wrote:
> > On Wed, Aug 07, 2024 at 01:01:08PM GMT, Greg Kroah-Hartman wrote:
> > > On Wed, Aug 07, 2024 at 01:09:14AM +0200, Daniel Gomez via B4 Relay wrote:
> > > > This patch set allows for building the Linux kernel for arm64 in macOS with
> > > > LLVM.
> > >
> > > Is this a requirement somewhere that this must work?  It seems like an
> > > odd request, what workflows require cross-operating-system builds like
> > > this?
> >
> > This isn't a requirement, but it would, for example, support workflows for QEMU
> > users and developers on macOS. They could build/compile the kernel natively and
> > use it to launch QEMU instances, simplifying their process.
>
> But that's not a real workload of anyone?  How often does this ever come
> up?  Who is going to maintain this cross-build functionality over time?

it is a real workload of me,  i was running qemu-system-aarch64 on x86
and it was
pretty slow. so got a M3 pro to accelerate my development. frequently changing
kernel's source code, i am using qemu-system-aarch64 to do quick verification.

>
> thanks,
>
> greg k-h
>

Thanks
Barry