Subject: Re: [PATCH] powerpc: Fix -mcpu= options for SPE-only compiler

From: Segher Boessenkool <[email-masked]>
Date: Wed, 26 Dec 2018 17:45:52 -0600

Hi!

On Wed, Dec 26, 2018 at 02:15:11PM +0000, Ben Hutchings wrote:
> GCC for Debian's "powerpcspe" architecture only supports 32-bit
> SPE targets, and using -mcpu=powerpc or -mcpu=powerpc64 is a fatal
> error.

I don't see where your patch touches -mcpu=powerpc, and I don't see how
it would make a difference either?

> +ifdef CONFIG_PPC64
>  ifdef CONFIG_PPC_BOOK3S_64
>  ifdef CONFIG_CPU_LITTLE_ENDIAN
>  CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
> @@ -177,6 +178,7 @@ endif
>  else
>  CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
>  endif
> +endif

How can CONFIG_PPC_BOOK3S_64 be true while CONFIG_PPC64 is fals?  That
does not make a lot of sense.

Segher