On Wed Feb 4, 2026 at 1:05 PM CET, Paul Barker wrote:
> On Thu, 2026-01-29 at 08:39 -0800, Sadineni, Harish via
> lists.openembedded.org wrote:
>> From: Yoann Congal <[email protected]>
>> 
>> Currently, a ccache enabled build fails with:
>>   |   HOSTRUSTC scripts/generate_rust_target
>>   |   HOSTCC  scripts/kallsyms
>>   |   HOSTCC  scripts/sorttable
>>   |   HOSTCC  scripts/asn1_compiler
>>   |   TOUCH   include/generated/gcc-plugins.h
>>   |   DESCEND objtool
>>   | error: multiple input filenames provided (first two filenames are gcc and
>> .../tmp/work-shared/qemux86-64/kernel-source/scripts/generate_rust_target.rs)
>> 
>> when using ccache, value of "HOSTCC=cache gcc" when this value is passing
>> to rustc, It is thinking gcc is a input file. when ccache is not used 
>> "HOSTCC=gcc" is passed.
>> 
>> Disable ccache for kernel build if rust-kernel is enabled to workaround
>> this.
>> 
>> Signed-off-by: El Mehdi YOUNES <[email protected]>
>> Signed-off-by: Yoann Congal <[email protected]>
>> Signed-off-by: Harish Sadineni <[email protected]>
>
> This patch is good, but we should try to get the issue resolved upstream
> if we can so that ccache can be used.
>
> Has this been reported upstream yet? Could you also open a bug in our
> bugzilla to track this?

Hello,

For context, a lengthy discussion happened on this patch here:
https://lore.kernel.org/openembedded-core/ca+tgqk9yd2wwkrhmkhoff-8n0cescsefwd2dxr4sbo9fdqx...@mail.gmail.com/t/#u

And, sadly, we lack resources at the moment on our side to follow-up on this :-/

Regards,

-- 
Yoann Congal
Smile ECS

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