linux-kernel - Re: gcc 5 & 6 & others already out of date?

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Message-ID: <CAKwvOdnP=FTzhm1S-_ZyQaF+LGYkF1DWUekRzvEmxAr=u=FTCQ@mail.gmail.com>
Date:   Thu, 13 Oct 2022 14:03:30 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Florian Weimer <fweimer@...hat.com>
Cc:     "Jason A. Donenfeld" <Jason@...c4.com>,
        Mark Brown <broonie@...nel.org>,
        linux-toolchains@...r.kernel.org,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: gcc 5 & 6 & others already out of date?

On Thu, Oct 13, 2022 at 11:44 AM Florian Weimer <fweimer@...hat.com> wrote:
>
> * Jason A. Donenfeld:
>
> > It's also easy, nearly trivial, to download toolchains. Arnd provides a
> > bunch with his crosstool. "Must use a toolchain from your distro" is a
> > requirement that affects nobody.
>
> But not everything will be built with the cross-compiler.  For the
> kernel build tools and other userspace components, you'll need a native
> toolchain that can build programs that can actually run on the build
> host.

... when using GCC. We don't have this pain when using clang.

https://docs.kernel.org/kbuild/llvm.html#llvm-utilities

i.e.
$ make ARCH=arm LLVM=1

will build with one instance of a clang binary (and ld.lld and
llvm-objcopy etc.) for Target AND Host.  No need for multiple
toolchain binaries.
-- 
Thanks,
~Nick Desaulniers