[Buildroot] [PATCH 1/1] arch/arm: Add Cortex-a53 CPU

[Waldemar Brodkorb <wbx@openadk.org>]

Hi Thomas,
Thomas Petazzoni wrote,

> Hello,
> 
> On Fri, 19 Aug 2016 10:07:04 +1000, Matt Flax wrote:
> > Adds the Cortex-a53 CPU to the target architecture variant choice. This sets
> > the toolchain to use cortex-a53 as the target. The effect is that various
> > cortex-a53 tunings are enabled for the compilation of packages.
> > 
> > Signed-off-by: Matt Flax <flatmax@flatmax.org>
> 
> The A53 is an ARM64 CPU, so it should rather be added to
> Config.in.aarch64 (in which we don't yet have a CPU selection, but that
> can be added).
> 
> Or are you building a 32 bits ARM system for a Cortex-A53 ? In that
> case, adding it to Config.in.arm would be OK, but it's a bit annoying
> that we would have to duplicate many ARM CPUs between Config.in.arm and
> Config.in.aarch64.

The new rpi3 can be compiled with optimization for cortex-a53 in ARM
32 bit mode. The aarch64 port for rpi3 isn't complete. So this might
be a use case. I fixed one issue in uCLibc-ng in the past to allow
cortex-a53 optimized builds.

best regards
 Waldemar