Subject: Re: [PATCH v2] powerpc: Update compilation flags with core specific options

From: Scott Wood <[email-masked]>
Date: Mon, 29 Jul 2013 18:53:13 -0500

On 07/25/2013 06:54:14 AM, Catalin Udma wrote:
> If CONFIG_E500 is enabled, the compilation flags are updated
> specifying the target core -mcpu=3De5500/e500mc/8540
> Also remove -Wa,-me500, being incompatible with -mcpu=3De5500/e6500
> The assembler option is redundant if the -mcpu=3D flag is set.
> The patch fixes the kernel compilation problem for e5500/e6500
> when using gcc option -mcpu=3De5500/e6500.
>=20
> Signed-off-by: Catalin Udma <[email-masked]>
> ---
> changes for v2:
>     - update also KBUILD_AFLAGS with -mcpu and -msoft-float flags
>=20
>  arch/powerpc/Makefile |   16 +++++++++++++++-
>  1 files changed, 15 insertions(+), 1 deletions(-)
>=20
> diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
> index 0624909..cb5cbe2 100644
> --- a/arch/powerpc/Makefile
> +++ b/arch/powerpc/Makefile
> @@ -140,6 +140,21 @@ ifeq ($(CONFIG_6xx),y)
>  KBUILD_CFLAGS		+=3D -mcpu=3Dpowerpc
>  endif
>=20
> +ifeq ($(CONFIG_E500),y)
> +ifeq ($(CONFIG_64BIT),y)
> +KBUILD_CFLAGS		+=3D -mcpu=3De5500
> +KBUILD_AFLAGS		+=3D -mcpu=3De5500 -msoft-float
> +else
> +ifeq ($(CONFIG_PPC_E500MC),y)
> +KBUILD_CFLAGS		+=3D -mcpu=3De500mc
> +KBUILD_AFLAGS		+=3D -mcpu=3De500mc -msoft-float
> +else
> +KBUILD_CFLAGS		+=3D -mcpu=3D8540
> +KBUILD_AFLAGS		+=3D -mcpu=3D8540 -msoft-float
> +endif
> +endif
> +endif

Instead of specifying -msoft-float here, shouldn't it go on the main =20
KBUILD_AFLAGS in arch/powerpc/Makefile, right next to where it's added =20
for KBUILD_CFLAGS?

-Scott=