[Buildroot] [PATCH 27/31] arch/powerpc: get rid of BR2_GCC_TARGET_TUNE
Yann E. MORIN
yann.morin.1998 at free.fr
Sun Oct 19 22:17:14 UTC 2014
Thomas, All,
On 2014-10-19 22:08 +0200, Thomas Petazzoni spake thusly:
> According to the gcc documentation for PowerPC options:
>
> '-mtune=CPU_TYPE'
> Set the instruction scheduling parameters for machine type
> CPU_TYPE, but do not set the architecture type, register usage, or
> choice of mnemonics, as '-mcpu=CPU_TYPE' would. The same values
> for CPU_TYPE are used for '-mtune' as for '-mcpu'. If both are
> specified, the code generated will use the architecture, registers,
> and mnemonics set by '-mcpu', but the scheduling parameters set by
> '-mtune'.
>
> In the case of Buildroot where we only target a specific system, using
> -mtune therefore doesn't make much sense, and using -mcpu would be
> more appropriate. As a consequence, this patch makes PowerPC use
> BR2_GCC_TARGET_CPU instead of BR2_GCC_TARGET_TUNE.
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Regards,
Yann E. MORIN.
> ---
> arch/Config.in.powerpc | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/Config.in.powerpc b/arch/Config.in.powerpc
> index 239f5dc..fabee9f 100644
> --- a/arch/Config.in.powerpc
> +++ b/arch/Config.in.powerpc
> @@ -160,7 +160,7 @@ config BR2_ENDIAN
> config BR2_ARCH_HAS_ATOMICS
> default y
>
> -config BR2_GCC_TARGET_TUNE
> +config BR2_GCC_TARGET_CPU
> default "401" if BR2_powerpc_401
> default "403" if BR2_powerpc_403
> default "405" if BR2_powerpc_405
> --
> 2.0.0
>
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
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