Re: [PATCH] x86/build/64: Prevent native builds from generating APX instructions

[Chang S. Bae]

On 7/12/2026 1:25 PM, Nathan Chancellor wrote:
> Miguel's comment aside:
>
> Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx>

Thanks!

> As the flag is the same between the two compilers, I think it would be
> more readable to do something like:
>
>    # Do not generate APX instructions as in-kernel use isn't ready
>    # Supported by GCC 14+ and LLVM 18+
>    KBUILD_CFLAGS += $(call cc-option,-mno-apxf)
Yeah, thanks -- I took this for V2.

BTW now I realized that both compilers already support `apx-features=` 
to specify sub-options. Instead of -mno-apxf entirely, 
-mno-apx-features="egpr" can just disable the use of EGPRs.

Thanks,
Chang