linux-kernel - Re: [PATCH 0/2] selftests/nolibc: small simplification of test development phase

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Date:   Mon, 23 Jan 2023 18:20:16 +0100
From:   Willy Tarreau <w@....eu>
To:     Ammar Faizi <ammarfaizi2@...weeb.org>
Cc:     "Paul E. McKenney" <paulmck@...nel.org>,
        linux-kernel@...r.kernel.org, Shuah Khan <shuah@...nel.org>,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 0/2] selftests/nolibc: small simplification of test
 development phase

Hi Ammar,

On Mon, Jan 23, 2023 at 11:57:56PM +0700, Ammar Faizi wrote:
> Is there a way to make it work for the default qemu installation?
> Or maybe it's a mandatory requirement to build qemu from the source?
> 
> I use the qemu that comes from Ubuntu apt. I have "qemu-system-x86_64",
> but no "qemu-x86_64". So, something like this...
> 
>   $ which qemu-x86_64
>   $ echo $?
>   1
> 
>   $ which qemu-system-x86_64
>   /usr/bin/qemu-system-x86_64

Ah now I think I understand Paul's question. I didn't know that the
userland version was not always provided. I've always had both side
by side.

> It would be great if we can avoid building qemu from the source. But if
> not, let's go with that.

As Paul indicated, it's really trouble-free and I think I've only done
that since the very first day I started to use QEMU, reason why I probably
never noticed that not everything was packaged.

Then at least to respond to Paul, it could make sense to add a note that
on some distros the userland version might not always be provided and
might require a pretty simple rebuild of QEMU.

Thanks!
Willy