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15.20.9587.013; Wed, 11 Feb 2026 11:48:00 +0000 Message-ID: <92f80f63-5663-40b2-99c6-09b04a6d0c7b@windriver.com> Date: Wed, 11 Feb 2026 17:17:50 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [OE-core] [PATCH v5 07/15] kernel-yocto.bbclass: Disable ccache when rust-kernel is enabled To: Yoann Congal , Richard Purdie Cc: Paul Barker , openembedded-core@lists.openembedded.org, Randy.MacLeod@windriver.com, Sundeep.Kokkonda@windriver.com, alistair.francis@wdc.com, bruce.ashfield@gmail.com, elmehdi.younes@smile.fr References: <20260129163910.2612040-1-Harish.Sadineni@windriver.com> <20260129163910.2612040-8-Harish.Sadineni@windriver.com> <8a9cf281b36ede03135fb042e260d22785ed4f38.camel@pbarker.dev> <1cd94533d438ad4e689da8636bae06859778ef29.camel@linuxfoundation.org> Content-Language: en-US From: Harish Sadineni In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed X-ClientProxiedBy: MA5PR01CA0144.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a01:1b9::11) To 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route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602110092 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mx0a-0064b401.pphosted.com id 61B5JpXm4165743 List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Wed, 11 Feb 2026 11:48:06 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/230979 On 2/10/2026 8:54 PM, Yoann Congal wrote: > CAUTION: This email comes from a non Wind River email account! > Do not click links or open attachments unless you recognize the sender = and know the content is safe. > > On Wed Feb 4, 2026 at 2:07 PM CET, Yoann Congal wrote: >> Le mer. 4 f=C3=A9vr. 2026 =C3=A0 13:34, Richard Purdie < >> richard.purdie@linuxfoundation.org> a =C3=A9crit : >> >>> On Wed, 2026-02-04 at 13:31 +0100, Yoann Congal wrote: >>>> 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 >>>>>> >>>>>> 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_ta= rget.rs) >>>>>> when using ccache, value of "HOSTCC=3Dcache gcc" when this value i= s >>> passing >>>>>> to rustc, It is thinking gcc is a input file. when ccache is not >>> used "HOSTCC=3Dgcc" is passed. >>>>>> Disable ccache for kernel build if rust-kernel is enabled to >>> workaround >>>>>> this. >>>>>> >>>>>> Signed-off-by: El Mehdi YOUNES >>>>>> Signed-off-by: Yoann Congal >>>>>> Signed-off-by: Harish Sadineni >>>>> 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 o= ur >>>>> bugzilla to track this? >>>> Hello, >>>> >>>> For context, a lengthy discussion happened on this patch here: >>>> >>> https://lore.kernel.org/openembedded-core/CA+TGqK9Yd2WWKrhMkhofF-8N0c= ESCSefWD2DXr4sBO9fDQXyrg@mail.gmail.com/t/#u >>>> And, sadly, we lack resources at the moment on our side to follow-up= on >>> this :-/ >>> >>> Putting some links alongside this to more details would probably at >>> least help a bit, particularly if ccache upstream documents it is >>> imcompatible with rust... >>> >> Ok, I'll send a more documented patch to Harish for him to integrate i= n his >> next iteration. > I pushed a branch on contrib (v5 + this commit modified) > https://git.openembedded.org/openembedded-core-contrib/log/?h=3Dycongal= /kernel-rust > > The modified commit is: > https://git.openembedded.org/openembedded-core-contrib/commit/?h=3Dycon= gal/kernel-rust&id=3D794bdad82933ee112452c8c08c917cf235e07ada > > Harish, are you OK taking this for your next iteration? Yes, I'm=C2=A0 fine with this. Thanks Harish > > Regards, > -- > Yoann Congal > Smile ECS >