Re: [PATCH] Documentation: kbuild: explain handling optional dependencies

[Randy Dunlap]

On 9/15/23 00:44, Arnd Bergmann wrote:
> On Fri, Sep 15, 2023, at 09:34, Jani Nikula wrote:
>>
>> IS_REACHABLE() considered harmful.
> 

+1 absolutely.

> Absolutely agreed, and I'm sorry I introduced it in the
> first place in commit 9b174527e7b75 ("[media] Add and use
> IS_REACHABLE macro").
> 
> At the time, it was only used by drivers/media, which used
> to have a lot of open-coded instances of it and a lot of
> wrong checks.
> 
> Having a formal syntax for it was an improvement for
> drivers/media since it was more broken before, but it's
> usually a mistake to use it when there is another solution,
> and we probably should have tried harder to fix the
> dependencies in drivers/media at the time.
> 
>       Arnd

-- 
~Randy