linux-kernel - Re: [PATCH] x86/build: Raise the minimum LLVM version to 15.0.0

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Message-ID: <CAMj1kXGOdRXpAJT8ujpaWzcLXAJd=NOLXcRYWBKrt=oZ21EeVw@mail.gmail.com>
Date: Fri, 21 Feb 2025 11:30:09 +0100
From: Ard Biesheuvel <ardb@...nel.org>
To: Nathan Chancellor <nathan@...nel.org>
Cc: Ingo Molnar <mingo@...nel.org>, x86@...nel.org, 
	Nick Desaulniers <nick.desaulniers+lkml@...il.com>, Bill Wendling <morbo@...gle.com>, 
	Justin Stitt <justinstitt@...gle.com>, Uros Bizjak <ubizjak@...il.com>, 
	Brian Gerst <brgerst@...il.com>, linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] x86/build: Raise the minimum LLVM version to 15.0.0

On Thu, 20 Feb 2025 at 21:08, Nathan Chancellor <nathan@...nel.org> wrote:
>
> In a similar vein as commit a3e8fe814ad1 ("x86/build: Raise the minimum
> GCC version to 8.1"), bump the minimum supported version of LLVM for
> building x86 kernels to 15.0.0, as that is the first version that has
> support for '-mstack-protector-guard-symbol', which is used
> unconditionally after commit 80d47defddc0 ("x86/stackprotector/64:
> Convert to normal per-CPU variable"):
>
>   clang-14: error: unknown argument: '-mstack-protector-guard-symbol=__ref_stack_chk_guard'
>
> Fixes: 80d47defddc0 ("x86/stackprotector/64: Convert to normal per-CPU variable")
> Link: https://github.com/llvm/llvm-project/commit/efbaad1c4a526e91b034e56386e98a9268cd87b2
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>
> ---
>  scripts/min-tool-version.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>

Reviewed-by: Ard Biesheuvel <ardb@...nel.org>


> diff --git a/scripts/min-tool-version.sh b/scripts/min-tool-version.sh
> index 06c4e410ecab..787868183b84 100755
> --- a/scripts/min-tool-version.sh
> +++ b/scripts/min-tool-version.sh
> @@ -26,7 +26,7 @@ gcc)
>         fi
>         ;;
>  llvm)
> -       if [ "$SRCARCH" = s390 ]; then
> +       if [ "$SRCARCH" = s390 -o "$SRCARCH" = x86 ]; then
>                 echo 15.0.0
>         elif [ "$SRCARCH" = loongarch ]; then
>                 echo 18.0.0
>
> ---
> base-commit: 929ce2d9f919967fe8edf7e840165e43612c2576
> change-id: 20250220-x86-bump-min-llvm-for-stackp-9e358db476e2
>
> Best regards,
> --
> Nathan Chancellor <nathan@...nel.org>
>