Re: [OE-core] [PATCH v5 07/15] kernel-yocto.bbclass: Disable ccache when rust-kernel is enabled

[Paul Barker <paul@pbarker.dev>]

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On Thu, 2026-01-29 at 08:39 -0800, Sadineni, Harish via
lists.openembedded.org wrote:
> From: Yoann Congal <yoann.congal@smile.fr>
> 
> 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 <elmehdi.younes@smile.fr>
> Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
> Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>

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?

Best regards,

-- 
Paul Barker


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