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From:   Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Date:   Thu, 14 Jan 2021 19:14:56 +0100
Message-ID: <CANiq72krA1VrVC2ecUCQFAgJC07od8POjpVUoGFYJOHjZ23ckQ@mail.gmail.com>
Subject: Re: [PATCH v2] kbuild: check the minimum compiler version in Kconfig
To:     Masahiro Yamada <masahiroy@kernel.org>
Cc:     Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Paul Gortmaker <paul.gortmaker@windriver.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Nathan Chancellor <natechancellor@gmail.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Will Deacon <will@kernel.org>,
        clang-built-linux <clang-built-linux@googlegroups.com>,
        linux-kernel <linux-kernel@vger.kernel.org>
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On Thu, Jan 14, 2021 at 5:25 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> The cc-version.sh also shows the error if the compiler is old:
>
>   $ make defconfig CC=clang-9
>   *** Default configuration is based on 'x86_64_defconfig'
>   ***
>   *** Compiler is too old.
>   ***   Your Clang version:    9.0.1
>   ***   Minimum Clang version: 10.0.1
>   ***
>   scripts/Kconfig.include:46: Sorry, this compiler is unsupported.

That looks nice. Hopefully we can do the same approach for other tools too!

> I put the stub for ICC because I see <linux/compiler-intel.h> although
> I am not sure if building the kernel with ICC is well-supported.

I doubt it, and there seems to be no maintainer listed either. I think
it could be considered for removal in an RFC.

Cheers,
Miguel