From: Carlo Arenas <carenas@gmail.com>
Date: Tue, 09 Dec 2025 00:44:05 GMT
Subject: Re: [PATCH 0/2] Few fixes for cross-compiling with Meson
Message-ID: <CAPUEspjifD8MYp6UR4pE91OqcJQdFafpeG8zNo1kfdxhnch_3A@mail.gmail.com>
In-Reply-To: <874iq1vxwt.fsf@iotcl.com>

On Mon, Dec 8, 2025 at 6:41 AM Toon Claes <toon@iotcl.com> wrote:
>
> Carlo Marcelo Arenas Belón <carenas@gmail.com> writes:
>
> > On Tue, Dec 02, 2025 at 11:48:07AM -0800, Toon Claes wrote:
> >> I was cross-compiling for s390x.
> >
> > Just to clarify, you mean Linux on IBM Z/LinuxOne, not 64bit ZOS/ZVM,
> > right?
>
> I'm sorry, I'm not aware of the correct terminology here.

IBM marketing doesn't make it easier, but yes IBM mainframes can run
multiple OS, and I have to admit I was kind of surprised to read we
had a working meson cross compilation for Z/OS, because I know that at
least cmake has issues even building natively.

> If I run file(1) on the compiled binary, I'm getting:
>
>     ELF 64-bit MSB pie executable, IBM S/390, version 1 (SYSV),
>     dynamically linked, interpreter /lib/ld64.so.1, for GNU/Linux 3.2.0

So this is 64-bit Big Endian linux for the s390x architecture (likely
compatible with z13 or higher CPUs)

I happen to have one of those under the desk running RHEL9/s390x, so
will be happy to test your crosscompiled binaries, assuming it is as
simple as installing them somewhere and running something like `make
test`

Carlo