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Mon, 3 Mar 2025 03:30:12 +0000 Received: from DS0PR11MB7312.namprd11.prod.outlook.com ([fe80::8436:b2d3:31a9:1c8c]) by DS0PR11MB7312.namprd11.prod.outlook.com ([fe80::8436:b2d3:31a9:1c8c%5]) with mapi id 15.20.8489.025; Mon, 3 Mar 2025 03:30:12 +0000 Content-Type: multipart/alternative; boundary="------------wvkEsBQiEdEzGUe0y0lS9eUE" Message-ID: Date: Mon, 3 Mar 2025 11:30:05 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [OE-core] [PATCH] Revert "python3-ctypes: depend on ldconfig only if distro-feature set" To: Richard Purdie , =?UTF-8?Q?J=C3=B6rg_Sommer?= Cc: Mathieu Dubois-Briand , openembedded-core@lists.openembedded.org References: <20250220035724.1460062-1-changqing.li@windriver.com> <23e2fa72-4225-4dfd-8d5b-cd8afe03b411@windriver.com> <48f11c6288db844ec985daf20f34e92974519e82.camel@linuxfoundation.org> <6f23591757291b5bdeea36d6bf630c121e188db3.camel@linuxfoundation.org> Content-Language: en-US From: Changqing Li In-Reply-To: <6f23591757291b5bdeea36d6bf630c121e188db3.camel@linuxfoundation.org> X-ClientProxiedBy: SG2PR06CA0227.apcprd06.prod.outlook.com (2603:1096:4:68::35) To DS0PR11MB7312.namprd11.prod.outlook.com (2603:10b6:8:11f::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR11MB7312:EE_|DM4PR11MB7277:EE_ X-MS-Office365-Filtering-Correlation-Id: ebf85569-e19b-4bcb-d5e2-08dd5a03b4ad X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|8096899003|13003099007; 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Mon, 03 Mar 2025 03:30:22 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/212196 --------------wvkEsBQiEdEzGUe0y0lS9eUE 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 5233K3I1021733 On 2/28/25 18:50, Richard Purdie 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 Fri, 2025-02-28 at 11:35 +0100, J=C3=B6rg Sommer wrote: >> Richard Purdie schrieb am Fr 28. Feb, 10:20 (+0000): >>> DISTRO_FEATURES are high level policy controls, not "this should be >>> included or excluded" controls. For example "pam" controls whether th= e >>> access control modules are configured/used, not whether libpam is or = is >>> not included. >> But it controls if other packages (e.g. systemd) enable pam support or= not. >> The same goes with ldconfig: Should ldconfig support in the packages b= e >> enabled (which would pull-in ldconfig as dependency). >> >>> For ldconfig, as I remember, the distro config was about whether to >>> include "ldconfig" calls after installing libraries and whether to us= e the >>> ld cache. >> If the feature is only about enabling code in the postinst script, tha= n we >> should find a better description of the feature > I think the description needs improving and I think we'd take patches > to do that. > >>> ldconfig: Include support for ldconfig and ld.so.conf on the target. >> https://docs.yoctoproject.org/ref-manual/features.html >> >>> Packages being installed or not is an image level decision, not distr= o >>> level. >> Yes, that's also my understanding. But enabling some features (e.g. x1= 1 >> support) leads to recipes set DEPENDS on libs and this leads to the >> installation of some packages. So DISTRO_FEATURES influence indirectly= what >> gets into the image. > The key word is indirectly. Where things have a hard dependency on > something, they do include that dependency and it isn't conditional on > a distro feature. > > In this case, the usage is tangential to what the DISTRO_FEATURE was > designed for (ld cache). I do agree ldconfig is optional so RRECOMMENDS > seems better than a hard RDEPENDS though. I will send a patch to update RDEPENDS -> RRECOMMENDS Thanks Changqing > >>> In this case, perhaps we should drop the RDEPENDS to a RRECOMMENDS? >> This would be helpful to remove ldconfig, if django is installed. >> >> But the main question is still open: Why should I want ldconfig and re= move >> it from DISTRO_FEATURES? What is this use case? > It is being used to control whether the ld cache is being used or not. > That has to be done at a distro wide policy level. Whether ldconfig > makes it into the image or not is an indirect effect. > > We can control the inclusion of ldconfig for ctypes at a package/image > level, it isn't a distro config level issue. > > Cheers, > > Richard > > --------------wvkEsBQiEdEzGUe0y0lS9eUE 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 5233K3I1021733


On 2/28/25 18:50, Richard Purdie wrote= :
CAUTION: This email comes fr=
om a non Wind River email account!
Do not click links or open attachments unless you recognize the sender an=
d know the content is safe.

On Fri, 2025-02-28 at 11:35 +0100, J=C3=B6rg Sommer wrote:

Richard Purdie schrieb am =
Fr 28. Feb, 10:20 (+0000):

DISTRO_FEATURES are high=
 level policy controls, not "this should be
included or excluded" controls. For example "pam" controls=
 whether the
access control modules are configured/used, not whether libpam is or is
not included.

But it controls if other packages (e.g. systemd) enable pam support or no=
t.
The same goes with ldconfig: Should ldconfig support in the packages be
enabled (which would pull-in ldconfig as dependency).


For ldconfig, as I remem=
ber, the distro config was about whether to
include "ldconfig" calls after installing libraries and whether=
 to use the
ld cache.

If the feature is only about enabling code in the postinst script, than w=
e
should find a better description of the feature

I think the description needs improving and I think we'd take patches
to do that.


ldconfig: Include suppor=
t for ldconfig and ld.so.conf on the target.

https://docs.yoctoproject.org/ref-manual/featur=
es.html


Packages being installed=
 or not is an image level decision, not distro
level.

Yes, that's also my understanding. But enabling some features (e.g. x11
support) leads to recipes set DEPENDS on libs and this leads to the
installation of some packages. So DISTRO_FEATURES influence indirectly wh=
at
gets into the image.

The key word is indirectly. Where things have a hard dependency on
something, they do include that dependency and it isn't conditional on
a distro feature.

In this case, the usage is tangential to what the DISTRO_FEATURE was
designed for (ld cache). I do agree ldconfig is optional so RRECOMMENDS
seems better than a hard RDEPENDS though.

I will send a patch to update RRECOMMENDS=

Thanks

Changqing 



In this case, perhaps we=
 should drop the RDEPENDS to a RRECOMMENDS?

This would be helpful to remove ldconfig, if django is installed.

But the main question is still open: Why should I want ldconfig and remov=
e
it from DISTRO_FEATURES? What is this use case?

It is being used to control whether the ld cache is being used or not.
That has to be done at a distro wide policy level. Whether ldconfig
makes it into the image or not is an indirect effect.

We can control the inclusion of ldconfig for ctypes at a package/image
level, it isn't a distro config level issue.

Cheers,

Richard
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