linux-kernel - Re: odd endianness toolchains for crosstool

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Message-ID: <06e71cfe-4928-539b-7b67-b06e3405f2cc@landley.net>
Date:   Thu, 28 Apr 2022 01:43:23 -0500
From:   Rob Landley <rob@...dley.net>
To:     "Jason A. Donenfeld" <Jason@...c4.com>, arnd@...db.de,
        linux-kernel@...r.kernel.org
Subject: Re: odd endianness toolchains for crosstool

On 4/24/22 20:39, Jason A. Donenfeld wrote:
> Hey Arnd,
> 
> I'm again experimenting with switching to your crosstool toolchains for
> WireGuard's CI. I've hit a few snags in the process:
> 
> - For powerpc, gcc needs to be built with `--enable-secureplt
>   --with-long-double-64` in order for musl to run.
> - Need powerpc64le compiler (-mabi=elfv2).
> - Need mipsel compiler.
> - Need aarch64_be compiler.
> - Need armeb compiler.
> - Need mips64el compiler.

https://landley.net/toybox/faq.html#cross2
https://landley.net/toybox/downloads/binaries/toolchains/latest/

They're all musl based. I use them to build little bootable systems under qemu
with a 300 line bash script:

https://landley.net/toybox/faq.html#mkroot
https://landley.net/toybox/downloads/binaries/mkroot/latest/

Ala:

https://github.com/landley/toybox/blob/master/scripts/mkroot.sh

Rob