Re: arm: shmobile_defconfig: ld.lld: error: undefined symbol: lynx_pcs_destroy

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On Tue, Jun 6, 2023, at 11:01, Geert Uytterhoeven wrote:
> Hi Naresh,
>
> On Tue, Jun 6, 2023 at 10:53 AM Naresh Kamboju
> <naresh.kamboju@xxxxxxxxxx> wrote:
>> On Tue, 6 Jun 2023 at 14:17, Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote:
>> > Following build regressions found while building arm shmobile_defconfig on
>> > Linux next-20230606.
>> >
>> > Regressions found on arm:
>> >
>> >  - build/clang-16-shmobile_defconfig
>> >  - build/gcc-8-shmobile_defconfig
>> >  - build/gcc-12-shmobile_defconfig
>> >  - build/clang-nightly-shmobile_defconfig
>>
>> And mips defconfig builds failed.
>> Regressions found on mips:
>>
>>   - build/clang-16-defconfig
>>   - build/gcc-12-defconfig
>>   - build/gcc-8-defconfig
>>   - build/clang-nightly-defconfig
>
> Please give my fix a try:
> https://lore.kernel.org/linux-renesas-soc/7b36ac43778b41831debd5c30b5b37d268512195.1686039915.git.geert+renesas@xxxxxxxxx
>

This won't work when PCS_LYNX is a loadable module and
STMMAC is built-in. I think we should just select PCS_LYNX
unconditionally from stmmac even if no front-end driver
using it is enabled.

I tried to come up with a way to move the dependency into
the altera specific front-end, but couldn't find an obvious
or simple way to do this.

Having a proper abstraction for PCS drivers instead of
directly calling into exported driver symbols might help
here, but that would add complexity elsewhere.

     Arnd




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