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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 ; Thu, 05 Feb 2026 09:08:40 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/230568 --------------8ZkJr8h7zsXFrntNyMHZYO5K Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mx0a-0064b401.pphosted.com id 6155vBsS2127478 On 2/4/26 23:53, Richard Purdie wrote: > On Wed, 2026-02-04 at 09:10 -0500, Bruce Ashfield wrote: >> >> On Wed, Feb 4, 2026 at 9:05=E2=80=AFAM Richard Purdie >> wrote: >>> On Wed, 2026-02-04 at 09:02 -0500, Bruce Ashfield wrote: >>>> On Wed, Feb 4, 2026 at 8:58=E2=80=AFAM Richard Purdie >>>> wrote: >>>>> On Wed, 2026-02-04 at 08:46 -0500, Bruce Ashfield via >>>>> lists.openembedded.org wrote: >>>>>> On Tue, Feb 3, 2026 at 9:09=E2=80=AFPM Kai Kang via >>>>>> lists.openembedded.org >>>>>> wrote: >>>>>>> From: Kai Kang >>>>>>> >>>>>>> Check whether kernel config CONFIG_MODULES set or not >>>>>>> before do_compile >>>>>>> and do_install in module.bbclass. If not set, it cannot >>>>>>> build and >>>>>>> install external modules. >>>>>>> >>>>>> >>>>>> This isn't the place to do that check. >>>>>> >>>>>> If modules are disabled get modules_do_compile out of the >>>>>> tasks. >>>>> Does it make sense to have something including module.bbclass >>>>> which >>>>> doesn't have CONFIG_MODULES set? >>>> Yes, that's what I'm trying to say. >>>> >>>> Don't even include it if you can't build modules. That puts >>>> the conditional in a single place, and keeps the code cleaner >>>> in the class. >>> I think we're talking cross purposes a bit. >>> >>> The issue is that if you ever reach do_compile in something using >>> module.bbclass which does not have CONFIG_MODULES set, that is a >>> problem and a hard error. >>> >>> So I'd argue that: >>> >>> * we only need the check in do_compile >>> * it should be a fatal exit hard error, not a warning >>> >>> which means the patch needs tweaking but not as you're suggesting. >>> >>> >> >> I don't have a strong opinion, so won't object. >> >> I just don't think adding any conditionals for module support in >> moduldes.bbclass makes sense. So one versus two checks >> is a wash for me. > I agree the warn conditional isn't quite right. I think it should be: > > if [ CONFIG_MODULES not set in config ]; > bberror Broken config, CONFIG_MODULES not set > exit 1 > fi > > so it is basically a sanity test that the config is valid. > > I'm a bit worried about what I'm missing though :/ The original problem is kernel config_modules is disabled, then external=20 modules such as lttng-modules can't be built. Recipe lttng-tools RRECOMMENDS on lttng-modules. If install lttng-tools=20 into image, it fails to build lttng-modules. Kernel config CONFIG_MODULES couldn't be checked whether enabled or=20 disabled after bitbake parse. Then there is no chance to remove=20 lttng-module from the dependencies. That why I check the config during=20 the do_compile and do_install with bbnote and generate empty rpm package. Regards, Kai > > Cheers, > > Richard > > > --=20 Kai Kang Wind River Linux --------------8ZkJr8h7zsXFrntNyMHZYO5K Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mx0a-0064b401.pphosted.com id 6155vBsS2127478
On 2/4/26 23:53, Richard Purdie wrote:= 
On Wed, 2026-02-04 at 09:10 =
-0500, Bruce Ashfield wrote:


On Wed, Feb 4, 2026 at 9:05=E2=80=AFAM Richard Purdie
<richard.purdie@linuxfoundation.org> wrote:

On Wed, 2026-02-04 at 09=
:02 -0500, Bruce Ashfield wrote:

On Wed, Feb 4, 2026 at=
 8:58=E2=80=AFAM Richard Purdie
<richard.purdie@linuxfoundation.org> wrote:

On Wed, 2026-02-04 a=
t 08:46 -0500, Bruce Ashfield via
lists.openembedded.org wrote:

On Tue, Feb 3, 202=
6 at 9:09=E2=80=AFPM Kai Kang via
lists.openembedded.org
<kai.kang=3Dwindriver.com@lists.openembedded=
.org> wrote:

From: Kai Kang <=
a class=3D"moz-txt-link-rfc2396E" href=3D"mailto:kai.kang@windriver.com">=
<kai.kang@windriver.com>

Check whether kernel config CONFIG_MODULES set or not
before do_compile
and do_install in module.bbclass. If not set, it cannot
build and
install external modules.



This isn't the place to do that check.

If modules are disabled get modules_do_compile out of the
tasks.

Does it make sense to have something including module.bbclass
which
doesn't have CONFIG_MODULES set?

Yes, that's what I'm trying to say.

Don't even include it if you can't build modules. That puts
the conditional in a single place, and keeps the code cleaner
in the class.

I think we're talking cross purposes a bit.

The issue is that if you ever reach do_compile in something using
module.bbclass which does not have CONFIG_MODULES set, that is a
problem and a hard error.

So I'd argue that:

* we only need the check in do_compile
* it should be a fatal exit hard error, not a warning

which means the patch needs tweaking but not as you're suggesting.




I don't have a strong opinion, so won't object.

I just don't think adding any conditionals for module support in
moduldes.bbclass makes sense. So one versus two checks
is a wash for me.

I agree the warn conditional isn't quite right. I think it should be:

if [ CONFIG_MODULES not set in config ];
    bberror Broken config, CONFIG_MODULES not set
    exit 1
fi

so it is basically a sanity test that the config is valid.

I'm a bit worried about what I'm missing though :/
The original problem is kernel config_modules is disabled, then external modules such as lttng-modules can't be built.

Recipe lttng-tools RRECOMMENDS on lttng-modules. If install lttng-tools into image, it fails to build lttng-modules.

Kernel config CONFIG_MO= DULES couldn't be checked whether enabled or disabled after bitbake parse= . Then there is no chance to remove lttng-module from the dependencies. That why I check the= config during the do_compile and do_install with bbnote and generate empty rpm package.

Regards,
Kai


Cheers,

Richard






--=20
Kai Kang
Wind River Linux
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