Re: [PATCH] ASoC: SOF: Intel: Initialize chip in hda_sdw_check_wakeen_irq()

[Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>]

>> That said, we DO compile with clang and there was no warning
>> https://github.com/thesofproject/linux/actions/runs/5542372669/job/15010818307
>>
>> Is this dependent on a specific version of clang? I'd like to make sure
>> our tools and tests are updated.
> 
> It should not be, I can reproduce it with all the versions of clang that
> the kernel supports (11.x+).
> 
> Looking at your GitHub Actions files, I am not sure exporting CC works
> correctly so I don't think you are building with clang. If I do it

D'oh. I did not see this one coming... nice.

> locally:
> 
> $ export CC=clang
> 
> $ make -j$(nproc) defconfig
> 
> $ grep -E 'CONFIG_(CC_IS|CLANG|GCC)' .config
> CONFIG_CC_IS_GCC=y
> CONFIG_GCC_VERSION=130201
> CONFIG_CLANG_VERSION=0
> CONFIG_GCC11_NO_ARRAY_BOUNDS=y
> CONFIG_GCC_PLUGINS=y
> # CONFIG_GCC_PLUGIN_LATENT_ENTROPY is not set
> # CONFIG_GCC_PLUGIN_STACKLEAK is not set
> 
> $ make -j$(nproc) sound/soc/sof/intel/hda.o
> 
> $ head -1 sound/soc/sof/intel/.hda.o.cmd
> savedcmd_sound/soc/sof/intel/hda.o := gcc ...
> 
> This was brought up some time ago and Masahiro made a decent point that
> this might not be a desirable behavior change.
> 
> https://lore.kernel.org/CAK7LNAT6Yp3oemUxSst+htnmM-St8WmSv+UZ2x2XF23cw-kU-Q@mail.gmail.com/
> 
> Switching to passing CC via the actual make command should fix that.

Not quite. We generate our .config using "make defconfig" as a baseline
and then "merge_config.sh" to add a bunch of fragments we need [1]. And
of course the latter script does not understand CC=clang and switches
back to GCC.

Looks like I painted myself in a corner for the last 5 years...Any
recommendations would be welcome.

[1]
https://github.com/thesofproject/kconfig/blob/master/kconfig-sof-default.sh