linux-kernel - Re: [PATCH v2 0/4] tools/nolibc: MIPS: entrypoint cleanups and N32/N64 ABIs

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Message-ID: <20250326220430._IkF6-zy@breakpoint.cc>
Date: Wed, 26 Mar 2025 23:04:30 +0100
From: Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
To: Thomas Weißschuh <linux@...ssschuh.net>
Cc: Willy Tarreau <w@....eu>, Shuah Khan <shuah@...nel.org>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	"Maciej W. Rozycki" <macro@...am.me.uk>,
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-mips@...r.kernel.org
Subject: Re: [PATCH v2 0/4] tools/nolibc: MIPS: entrypoint cleanups and
 N32/N64 ABIs

On 2025-03-26 22:51:54 [+0100], Thomas Weißschuh wrote:
> > mips32le works as-is.
> > For mips64le I had to s/-march=mips64r6/-march=mips64r2 to match the
> > ABI. Which makes me wonder: Why do do we need to pass -march here and
> > can't rely on toolchain defaults?
> 
> The goal here is to have an as-wide-as-possible test matrix for
> nolibc-test, which will mostly be running on QEMU anyways.
> Also we need to run the correct QEMU user variant; by fixing the
> architecture this is easy to do.

I would prefer to make distro users as in real hardware first class
citizen and not QEMU users. If you run qemu you can specify the ABI
anyway.

> Thomas

Sebastian