[yocto] [meta-raspberrypi] poky linux build fails if ARM erratum mfix linker switch is specified

[Andrei Gherzan]

On 3 November 2019 13:18:53 GMT, Khem Raj <raj.khem at gmail.com> wrote:
>On Sun, Nov 3, 2019 at 2:46 AM Andrei Gherzan <andrei at gherzan.ro>
>wrote:
>
>> On 01/11/2019 17:18, Khem Raj wrote:
>> > On Fri, Nov 1, 2019 at 1:28 AM Andrei Gherzan <andrei at gherzan.ro>
>wrote:
>> >>
>> >> Hi Steve,
>> >>
>> >> On 01/11/2019 05:32, Steve Pavao wrote:
>> >>> poky linux build fails when ARM erratum mfix linker switch is
>specified
>> >>> in local.conf:
>> >>>
>> >>> TARGET_LD_ARCH_append += " -mfix-cortex-a53-843419”
>> >>>
>> >>> causes build failure.
>> >>>
>> >>> Please advise how to use this switch successfully.  I am synced
>current
>> >>> in master branch in all layers as of today.  The switch causes
>libtool
>> >>> link to fail due to missing libbz2.so.  If I don’t specify the
>switch,
>> >>> the build completes without errors.
>> >>>
>> >>> It is important to be able to build poky linux with this switch
>to
>> avoid
>> >>> certain crash conditions as described in the ARM errata document.
>> >>
>> >> I haven't tried this erratum fix. It is indeed implemented at the
>> >> linker's lever. It's curious though to see the bz2 dependency. Can
>you
>> >> share the specific error? I assume you are doing this on RPi3.
>> >>
>> >
>> > this will impact rpi3 in 64bit mode, don't think 32bit needs this.
>I
>> > think its best to
>> > add this option in raspberrypi3-64.conf perhaps via TUNE_CCARGS
>>
>> I was thinking about this. The erratum seems to show that this
>applies
>> to all revisions of a53. So it sounds like we should add it in
>> `tune-cortexa53.inc`.
>>
>
>Up to r0b4 only so maybe not all a53 implementations are impacted
>

As far as I know that is the latest revision. Do you mean that newer revision might come up with this fixed? 

--
Andrei Gherzan
gpg: rsa4096/D4D94F67AD0E9640 | t: @agherzan