[Buildroot] [PATCH 02/11] arch: MIPS: Add config option BR2_GCC_TARGET_TUNE
Markos Chandras
Markos.Chandras at imgtec.com
Mon Apr 7 13:53:41 UTC 2014
On 04/03/2014 10:50 PM, Paul Cercueil wrote:
> Hi Yann,
>
> This patch would pass the same value to --with-arch and --with-tune,
> unless you define a different value for BR2_GCC_TARGET_TUNE in your
> defconfig. We use that for the Ingenic jz4740 processor, which is a
> mips32 processor but running better the code tuned for mips32r2.
>
Hi Paul,
I don't understand this patch as well. If the jz4740 needs a mips32r2
userland, why not use Target Options-> Target Architecture Variant ->
mips32r2? You want to use the same toolchain for non-mips32r2 targets as
well?
The TARGET_TUNE option has been removed for MIPS in
f60dafe06833a17540608d1c8172d6535c513f1e
"arch/mips: Set BR2_GCC_TARGET_ARCH for MIPS"
and i see no good reason to bring it back.
If you need to optimize for a different ISA, wouldn't it be possible to
use custom CFLAGS in Toolchain->Target Optimizations?
--
markos
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