Re: [PATCH] x86: LLVMLinux: Wrap -mno-80387 with cc-option

[Ingo Molnar]

* behanw@xxxxxxxxxxxxxxxxxx <behanw@xxxxxxxxxxxxxxxxxx> wrote:

> From: Behan Webster <behanw@xxxxxxxxxxxxxxxxxx>
> 
> Wrap -mno-80387 gcc options with cc-option so they don't break clang.
> 
> Signed-off-by: Behan Webster <behanw@xxxxxxxxxxxxxxxxxx>
> ---
>  arch/x86/Makefile | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/x86/Makefile b/arch/x86/Makefile
> index d1b7c37..ce6ad7e 100644
> --- a/arch/x86/Makefile
> +++ b/arch/x86/Makefile
> @@ -83,7 +83,9 @@ else
>          KBUILD_CFLAGS += -m64
>  
>          # Don't autogenerate traditional x87, MMX or SSE instructions
> -        KBUILD_CFLAGS += -mno-mmx -mno-sse -mno-80387 -mno-fp-ret-in-387
> +        KBUILD_CFLAGS += -mno-mmx -mno-sse
> +        KBUILD_CFLAGS += $(call cc-option,-mno-80387)
> +        KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)

Is there a clang equivalent option that inhibits all things FPU opcode 
generation by the compiler?

That's the general purpose of -no-80387.

Thanks,

	Ingo
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